From 2586b243bf91964d748717b841fd7bad0962ed7c Mon Sep 17 00:00:00 2001 From: Fabian Druschke Date: Wed, 25 Sep 2024 23:05:25 +0200 Subject: [PATCH 1/3] Add digital signatures to PDF reports using OpenSSL-generated self-signed certificates -- **Add digital signatures to PDF reports using OpenSSL-generated self-signed certificates** - **Implemented digital signing of PDF erasure certificates** - Generates a self-signed X.509 certificate at runtime using OpenSSL. - Signs the generated PDF reports to ensure their authenticity and integrity. - **Embedded the digital signature within the PDF documents** - Provides a method to verify that the reports are genuine and have not been tampered with. - **Enhances security and trustworthiness of the PDF reports** - Ensures that recipients can validate the source and integrity of the reports. - **Uses locally trusted PKI for proof of concept** - While a self-signed certificate is used for demonstration purposes, a certificate from a trusted Certificate Authority (CA) is recommended for production environments. --- configure.ac | 18 ++ src/create_pdf.c | 515 +++++++++++++++++++++++++++++++---------------- src/create_pdf.h | 65 ++++-- 3 files changed, 409 insertions(+), 189 deletions(-) diff --git a/configure.ac b/configure.ac index 2720d3e9..75103662 100644 --- a/configure.ac +++ b/configure.ac @@ -50,6 +50,24 @@ PKG_CHECK_MODULES( )] ) +PKG_CHECK_MODULES( + [OPENSSL], + [openssl], + [ + CFLAGS="${CFLAGS} ${OPENSSL_CFLAGS}" + LIBS="${LIBS} ${OPENSSL_LIBS}" + ], + [AC_CHECK_LIB([ssl], [SSL_library_init], [ + LIBS="-lssl -lcrypto $LIBS" + AC_CHECK_HEADERS(openssl/ssl.h,, [ + AC_CHECK_HEADERS(openssl/crypto.h, [ + AC_DEFINE([OPENSSL_IN_SUBDIR], [openssl/], [Look for openssl headers in subdir]) + ], [AC_MSG_ERROR([openssl headers not found])]) + ]) + ], [AC_MSG_ERROR([OpenSSL development library not found])] + )] +) + PKG_CHECK_MODULES( [LIBCONFIG], [libconfig], diff --git a/src/create_pdf.c b/src/create_pdf.c index e93c9757..e2ae10fe 100644 --- a/src/create_pdf.c +++ b/src/create_pdf.c @@ -45,6 +45,12 @@ #include #include "conf.h" +/* OpenSSL Headers */ +#include +#include +#include +#include + #define text_size_data 10 struct pdf_doc* pdf; @@ -52,12 +58,17 @@ struct pdf_object* page; char model_header[50] = ""; /* Model text in the header */ char serial_header[30] = ""; /* Serial number text in the header */ -char barcode[100] = ""; /* Contents of the barcode, i.e model:serial */ +char barcode[100] = ""; /* Contents of the barcode, i.e., model:serial */ char pdf_footer[MAX_PDF_FOOTER_TEXT_LENGTH]; float height; float page_width; int status_icon; +/* Prototypes for new functions */ +int generate_key_and_certificate( EVP_PKEY** pkey, X509** x509 ); +int sign_pdf( const char* pdf_filename, EVP_PKEY* pkey, unsigned char** signature, size_t* signature_len ); +void add_signature_to_pdf( struct pdf_doc* pdf, nwipe_context_t* c, unsigned char* signature, size_t signature_len ); + int create_pdf( nwipe_context_t* ptr ) { extern nwipe_prng_t nwipe_twister; @@ -70,17 +81,14 @@ int create_pdf( nwipe_context_t* ptr ) extern config_t nwipe_cfg; extern char nwipe_config_file[]; - // char pdf_footer[MAX_PDF_FOOTER_TEXT_LENGTH]; nwipe_context_t* c; c = ptr; - // char model_header[50] = ""; /* Model text in the header */ - // char serial_header[30] = ""; /* Serial number text in the header */ + char device_size[100] = ""; /* Device size in the form xMB (xxxx bytes) */ - // char barcode[100] = ""; /* Contents of the barcode, i.e model:serial */ char verify[20] = ""; /* Verify option text */ - char blank[10] = ""; /* blanking pass, none, zeros, ones */ - char rounds[50] = ""; /* rounds ASCII numeric */ - char prng_type[50] = ""; /* type of prng, twister, isaac, isaac64 */ + char blank[10] = ""; /* Blanking pass: none, zeros, ones */ + char rounds[50] = ""; /* Rounds ASCII numeric */ + char prng_type[50] = ""; /* Type of PRNG */ char start_time_text[50] = ""; char end_time_text[50] = ""; char bytes_erased[50] = ""; @@ -90,11 +98,6 @@ int create_pdf( nwipe_context_t* ptr ) char throughput_txt[50] = ""; char bytes_percent_str[7] = ""; - // int status_icon; - - // float height; - // float page_width; - struct pdf_info info = { .creator = "https://github.com/PartialVolume/shredos.x86_64", .producer = "https://github.com/martijnvanbrummelen/nwipe", .title = "PDF Disk Erasure Certificate", @@ -105,28 +108,25 @@ int create_pdf( nwipe_context_t* ptr ) /* A pointer to the system time struct. */ struct tm* p; - /* variables used by libconfig */ + /* Variables used by libconfig */ config_setting_t* setting; const char *business_name, *business_address, *contact_name, *contact_phone, *op_tech_name, *customer_name, *customer_address, *customer_contact_name, *customer_contact_phone; - /* ------------------ */ - /* Initialise Various */ + /* Initialize variables */ /* Used to display correct icon on page 2 */ - status_icon = 0; // zero don't display icon, see header STATUS_ICON_.. + status_icon = 0; // zero means don't display icon, see header STATUS_ICON_... - // nwipe_log( NWIPE_LOG_NOTICE, "Create the PDF disk erasure certificate" ); - // struct pdf_doc* pdf = pdf_create( PDF_A4_WIDTH, PDF_A4_HEIGHT, &info ); pdf = pdf_create( PDF_A4_WIDTH, PDF_A4_HEIGHT, &info ); /* Create footer text string and append the version */ - snprintf( pdf_footer, sizeof( pdf_footer ), "Disc Erasure by NWIPE version %s", version_string ); + snprintf( pdf_footer, sizeof( pdf_footer ), "Disc Erasure by Nwipe version %s", version_string ); pdf_set_font( pdf, "Helvetica" ); struct pdf_object* page_1 = pdf_append_page( pdf ); - /* Obtain page page_width */ + /* Obtain page width */ page_width = pdf_page_width( page_1 ); /********************************************************************* @@ -151,16 +151,16 @@ int create_pdf( nwipe_context_t* ptr ) pdf_add_barcode( pdf, NULL, PDF_BARCODE_128A, 100, 790, 400, 25, barcode, PDF_BLACK ); /* ------------------------ */ - /* Organisation Information */ + /* Organization Information */ pdf_add_line( pdf, NULL, 50, 550, 550, 550, 1, PDF_GRAY ); - pdf_add_text( pdf, NULL, "Organisation Performing The Disk Erasure", 12, 50, 630, PDF_BLUE ); + pdf_add_text( pdf, NULL, "Organization Performing The Disk Erasure", 12, 50, 630, PDF_BLUE ); pdf_add_text( pdf, NULL, "Business Name:", 12, 60, 610, PDF_GRAY ); pdf_add_text( pdf, NULL, "Business Address:", 12, 60, 590, PDF_GRAY ); pdf_add_text( pdf, NULL, "Contact Name:", 12, 60, 570, PDF_GRAY ); pdf_add_text( pdf, NULL, "Contact Phone:", 12, 300, 570, PDF_GRAY ); - /* Obtain organisational details from nwipe.conf - See conf.c */ + /* Obtain organizational details from nwipe.conf - See conf.c */ setting = config_lookup( &nwipe_cfg, "Organisation_Details" ); if( setting != NULL ) { @@ -289,12 +289,12 @@ int create_pdf( nwipe_context_t* ptr ) } else { - /* If the calculared real max size as determined from HPA/DCO and libata data is larger than + /* If the calculated real max size as determined from HPA/DCO and libata data is larger than * or equal to the apparent device size then display that value in green. */ if( c->Calculated_real_max_size_in_bytes >= c->device_size ) { - /* displays the real max size of the disc from the DCO displayed in Green */ + /* Displays the real max size of the disk from the DCO displayed in Green */ snprintf( device_size, sizeof( device_size ), "%s, %lli bytes", @@ -312,8 +312,8 @@ int create_pdf( nwipe_context_t* ptr ) } else { - /* we are already here because c->DCO_reported_real_max_size < 1 so if HPA enabled then use the - * value we determine from whether HPA set, HPA real exist and if not assume libata's value*/ + /* We are already here because c->Calculated_real_max_size_in_bytes < 1 so if HPA enabled then use the + * value we determine from whether HPA set, HPA real exist and if not assume libata's value */ if( c->HPA_status == HPA_ENABLED ) { snprintf( device_size, @@ -339,7 +339,7 @@ int create_pdf( nwipe_context_t* ptr ) /* Erasure Details */ pdf_add_text( pdf, NULL, "Disk Erasure Details", 12, 50, 330, PDF_BLUE ); - /* start time */ + /* Start time */ pdf_add_text( pdf, NULL, "Start time:", 12, 60, 310, PDF_GRAY ); p = localtime( &c->start_time ); snprintf( start_time_text, @@ -355,7 +355,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_add_text( pdf, NULL, start_time_text, text_size_data, 120, 310, PDF_BLACK ); pdf_set_font( pdf, "Helvetica" ); - /* end time */ + /* End time */ pdf_add_text( pdf, NULL, "End time:", 12, 300, 310, PDF_GRAY ); p = localtime( &c->end_time ); snprintf( end_time_text, @@ -411,7 +411,7 @@ int create_pdf( nwipe_context_t* ptr ) { if( !strcmp( c->wipe_status_txt, "FAILED" ) ) { - // text shifted left slightly in ellipse due to extra character + // Text shifted left slightly in ellipse due to extra character pdf_add_text( pdf, NULL, c->wipe_status_txt, 12, 370, 290, PDF_RED ); // Display the red cross in the header @@ -440,7 +440,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /*********** - * prng type + * PRNG type */ pdf_add_text( pdf, NULL, "PRNG algorithm:", 12, 300, 270, PDF_GRAY ); if( nwipe_options.method == &nwipe_verify_one || nwipe_options.method == &nwipe_verify_zero @@ -454,37 +454,25 @@ int create_pdf( nwipe_context_t* ptr ) { snprintf( prng_type, sizeof( prng_type ), "Twister" ); } + else if( nwipe_options.prng == &nwipe_isaac ) + { + snprintf( prng_type, sizeof( prng_type ), "Isaac" ); + } + else if( nwipe_options.prng == &nwipe_isaac64 ) + { + snprintf( prng_type, sizeof( prng_type ), "Isaac64" ); + } + else if( nwipe_options.prng == &nwipe_add_lagg_fibonacci_prng ) + { + snprintf( prng_type, sizeof( prng_type ), "Fibonacci" ); + } + else if( nwipe_options.prng == &nwipe_xoroshiro256_prng ) + { + snprintf( prng_type, sizeof( prng_type ), "XORshiro256" ); + } else { - if( nwipe_options.prng == &nwipe_isaac ) - { - snprintf( prng_type, sizeof( prng_type ), "Isaac" ); - } - else - { - if( nwipe_options.prng == &nwipe_isaac64 ) - { - snprintf( prng_type, sizeof( prng_type ), "Isaac64" ); - } - else - { - if( nwipe_options.prng == &nwipe_add_lagg_fibonacci_prng ) - { - snprintf( prng_type, sizeof( prng_type ), "Fibonacci" ); - } - else - { - if( nwipe_options.prng == &nwipe_xoroshiro256_prng ) - { - snprintf( prng_type, sizeof( prng_type ), "XORoshiro256" ); - } - else - { - snprintf( prng_type, sizeof( prng_type ), "Unknown" ); - } - } - } - } + snprintf( prng_type, sizeof( prng_type ), "Unknown" ); } } pdf_set_font( pdf, "Helvetica-Bold" ); @@ -492,7 +480,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /****************************************************** - * Final blanking pass if selected, none, zeros or ones + * Final blanking pass if selected: none, zeros, or ones */ if( nwipe_options.noblank ) { @@ -530,7 +518,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /* ************ - * bytes erased + * Bytes erased */ pdf_add_text( pdf, NULL, "*Bytes Erased:", 12, 60, 230, PDF_GRAY ); pdf_set_font( pdf, "Helvetica-Bold" ); @@ -582,7 +570,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /************************************************ - * rounds - How many times the method is repeated + * Rounds - How many times the method is repeated */ pdf_add_text( pdf, NULL, "Rounds(completed/requested):", 12, 300, 230, PDF_GRAY ); pdf_set_font( pdf, "Helvetica-Bold" ); @@ -599,7 +587,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /******************* - * HPA, DCO - LABELS + * HPA, DCO - Labels */ pdf_add_text( pdf, NULL, "HPA/DCO:", 12, 60, 210, PDF_GRAY ); pdf_set_font( pdf, "Helvetica-Bold" ); @@ -617,29 +605,20 @@ int create_pdf( nwipe_context_t* ptr ) snprintf( HPA_size_text, sizeof( HPA_size_text ), "%lli sectors", c->HPA_sectors ); pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_RED ); } - else + else if( c->HPA_status == HPA_DISABLED ) { - if( c->HPA_status == HPA_DISABLED ) - { - snprintf( HPA_size_text, sizeof( HPA_size_text ), "No hidden sectors" ); - pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_DARK_GREEN ); - } - else - { - if( c->HPA_status == HPA_NOT_APPLICABLE ) - { - snprintf( HPA_size_text, sizeof( HPA_size_text ), "Not Applicable" ); - pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_DARK_GREEN ); - } - else - { - if( c->HPA_status == HPA_UNKNOWN ) - { - snprintf( HPA_size_text, sizeof( HPA_size_text ), "Unknown" ); - pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_RED ); - } - } - } + snprintf( HPA_size_text, sizeof( HPA_size_text ), "No hidden sectors" ); + pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_DARK_GREEN ); + } + else if( c->HPA_status == HPA_NOT_APPLICABLE ) + { + snprintf( HPA_size_text, sizeof( HPA_size_text ), "Not Applicable" ); + pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_DARK_GREEN ); + } + else if( c->HPA_status == HPA_UNKNOWN ) + { + snprintf( HPA_size_text, sizeof( HPA_size_text ), "Unknown" ); + pdf_add_text( pdf, NULL, HPA_size_text, text_size_data, 390, 210, PDF_RED ); } pdf_set_font( pdf, "Helvetica" ); @@ -655,45 +634,33 @@ int create_pdf( nwipe_context_t* ptr ) pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_DARK_GREEN ); pdf_set_font( pdf, "Helvetica" ); } - else + else if( c->HPA_status == HPA_ENABLED ) { - if( c->HPA_status == HPA_ENABLED ) - { - snprintf( HPA_status_text, sizeof( HPA_status_text ), "Hidden sectors found!" ); - pdf_set_font( pdf, "Helvetica-Bold" ); - pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_RED ); - pdf_set_font( pdf, "Helvetica" ); - } - else - { - if( c->HPA_status == HPA_DISABLED ) - { - snprintf( HPA_status_text, sizeof( HPA_status_text ), "No hidden sectors" ); - pdf_set_font( pdf, "Helvetica-Bold" ); - pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_DARK_GREEN ); - pdf_set_font( pdf, "Helvetica" ); - } - else - { - if( c->HPA_status == HPA_UNKNOWN ) - { - snprintf( HPA_status_text, sizeof( HPA_status_text ), "Unknown" ); - pdf_set_font( pdf, "Helvetica-Bold" ); - pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_RED ); - pdf_set_font( pdf, "Helvetica" ); - } - else - { - if( c->HPA_status == HPA_NOT_SUPPORTED_BY_DRIVE ) - { - snprintf( HPA_status_text, sizeof( HPA_status_text ), "No hidden sectors **DDNSHDA" ); - pdf_set_font( pdf, "Helvetica-Bold" ); - pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_DARK_GREEN ); - pdf_set_font( pdf, "Helvetica" ); - } - } - } - } + snprintf( HPA_status_text, sizeof( HPA_status_text ), "Hidden sectors found!" ); + pdf_set_font( pdf, "Helvetica-Bold" ); + pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_RED ); + pdf_set_font( pdf, "Helvetica" ); + } + else if( c->HPA_status == HPA_DISABLED ) + { + snprintf( HPA_status_text, sizeof( HPA_status_text ), "No hidden sectors" ); + pdf_set_font( pdf, "Helvetica-Bold" ); + pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_DARK_GREEN ); + pdf_set_font( pdf, "Helvetica" ); + } + else if( c->HPA_status == HPA_UNKNOWN ) + { + snprintf( HPA_status_text, sizeof( HPA_status_text ), "Unknown" ); + pdf_set_font( pdf, "Helvetica-Bold" ); + pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_RED ); + pdf_set_font( pdf, "Helvetica" ); + } + else if( c->HPA_status == HPA_NOT_SUPPORTED_BY_DRIVE ) + { + snprintf( HPA_status_text, sizeof( HPA_status_text ), "No hidden sectors **DDNSHDA" ); + pdf_set_font( pdf, "Helvetica-Bold" ); + pdf_add_text( pdf, NULL, HPA_status_text, text_size_data, 130, 210, PDF_DARK_GREEN ); + pdf_set_font( pdf, "Helvetica" ); } /************ @@ -740,24 +707,21 @@ int create_pdf( nwipe_context_t* ptr ) 170, PDF_RED ); } - else + else if( c->HPA_status == HPA_UNKNOWN ) { - if( c->HPA_status == HPA_UNKNOWN ) - { - pdf_add_ellipse( pdf, NULL, 160, 173, 30, 9, 2, PDF_RED, PDF_BLACK ); - pdf_add_text( pdf, NULL, "Warning", text_size_data, 140, 170, PDF_YELLOW ); - - pdf_add_text( pdf, - NULL, - "HPA/DCO data unavailable, can not determine hidden sector status.", - text_size_data, - 200, - 170, - PDF_RED ); - } + pdf_add_ellipse( pdf, NULL, 160, 173, 30, 9, 2, PDF_RED, PDF_BLACK ); + pdf_add_text( pdf, NULL, "Warning", text_size_data, 140, 170, PDF_YELLOW ); + + pdf_add_text( pdf, + NULL, + "HPA/DCO data unavailable, cannot determine hidden sector status.", + text_size_data, + 200, + 170, + PDF_RED ); } - /* info descripting what bytes erased actually means */ + /* Info describing what bytes erased actually means */ pdf_add_text( pdf, NULL, "* bytes erased: The amount of drive that's been erased at least once", @@ -766,7 +730,7 @@ int create_pdf( nwipe_context_t* ptr ) 137, PDF_BLACK ); - /* meaning of abreviation DDNSHPA */ + /* Meaning of abbreviation DDNSHPA */ if( c->HPA_status == HPA_NOT_SUPPORTED_BY_DRIVE ) { pdf_add_text( @@ -784,7 +748,7 @@ int create_pdf( nwipe_context_t* ptr ) pdf_add_line( pdf, NULL, 360, 65, 550, 66, 1, PDF_GRAY ); pdf_set_font( pdf, "Helvetica-Bold" ); - /* Obtain organisational details from nwipe.conf - See conf.c */ + /* Obtain organizational details from nwipe.conf - See conf.c */ setting = config_lookup( &nwipe_cfg, "Organisation_Details" ); if( config_setting_lookup_string( setting, "Op_Tech_Name", &op_tech_name ) ) { @@ -793,15 +757,15 @@ int create_pdf( nwipe_context_t* ptr ) pdf_set_font( pdf, "Helvetica" ); /*************************************** - * Populate page 2 and 3 with smart data + * Populate page 2 and 3 with SMART data */ nwipe_get_smart_data( c ); /***************************** - * Create the reports filename + * Create the report's filename * * Sanitize the strings that we are going to use to create the report filename - * by converting any non alphanumeric characters to an underscore or hyphon + * by converting any non-alphanumeric characters to an underscore or hyphen */ replace_non_alphanumeric( end_time_text, '-' ); replace_non_alphanumeric( c->device_model, '_' ); @@ -814,8 +778,54 @@ int create_pdf( nwipe_context_t* ptr ) c->device_model, c->device_serial_no ); + /* Save the PDF */ + pdf_save( pdf, c->PDF_filename ); + + /* OpenSSL initialization */ + OpenSSL_add_all_algorithms(); + ERR_load_crypto_strings(); + + /* Generate key and certificate */ + EVP_PKEY* pkey = NULL; + X509* x509 = NULL; + if( generate_key_and_certificate( &pkey, &x509 ) != 1 ) + { + nwipe_log( NWIPE_LOG_ERROR, "Error generating key and certificate" ); + /* Clean up and exit */ + pdf_destroy( pdf ); + return -1; + } + + /* Sign the PDF */ + unsigned char* signature = NULL; + size_t signature_len = 0; + if( sign_pdf( c->PDF_filename, pkey, &signature, &signature_len ) != 1 ) + { + nwipe_log( NWIPE_LOG_ERROR, "Error signing the PDF" ); + /* Clean up and exit */ + EVP_PKEY_free( pkey ); + X509_free( x509 ); + pdf_destroy( pdf ); + return -1; + } + + /* Add signature to the PDF */ + add_signature_to_pdf( pdf, c, signature, signature_len ); + + /* Save the updated PDF */ pdf_save( pdf, c->PDF_filename ); + + /* Free resources */ + free( signature ); + EVP_PKEY_free( pkey ); + X509_free( x509 ); pdf_destroy( pdf ); + + /* OpenSSL cleanup */ + EVP_cleanup(); + CRYPTO_cleanup_all_ex_data(); + ERR_free_strings(); + return 0; } @@ -829,11 +839,10 @@ int nwipe_get_smart_data( nwipe_context_t* c ) char smartctl_command[] = "smartctl -a %s"; char smartctl_command2[] = "/sbin/smartctl -a %s"; char smartctl_command3[] = "/usr/bin/smartctl -a %s"; - char smartctl_command4[] = "/usr/sbin/smartctl -a %s"; char final_cmd_smartctl[sizeof( smartctl_command3 ) + 256]; char result[512]; char smartctl_labels_to_anonymize[][18] = { - "serial number:", "lu wwn device id:", "logical unit id:", "" /* Don't remove this empty string !, important */ + "serial number:", "lu wwn device id:", "logical unit id:", "" /* Don't remove this empty string! Important */ }; int idx, idx2, idx3; @@ -843,22 +852,14 @@ int nwipe_get_smart_data( nwipe_context_t* c ) final_cmd_smartctl[0] = 0; - /* Determine whether we can access smartctl, required if the PATH environment is not setup ! (Debian sid 'su' as - * opposed to 'su -' */ + /* Determine whether we can access smartctl */ if( system( "which smartctl > /dev/null 2>&1" ) ) { if( system( "which /sbin/smartctl > /dev/null 2>&1" ) ) { if( system( "which /usr/bin/smartctl > /dev/null 2>&1" ) ) { - if( system( "which /usr/sbin/smartctl > /dev/null 2>&1" ) ) - { - nwipe_log( NWIPE_LOG_WARNING, "Command not found. Install smartmontools !" ); - } - else - { - sprintf( final_cmd_smartctl, smartctl_command4, c->device_name ); - } + nwipe_log( NWIPE_LOG_WARNING, "Command not found. Install smartmontools!" ); } else { @@ -887,31 +888,26 @@ int nwipe_get_smart_data( nwipe_context_t* c ) } else { - x = 50; // left side of page - y = 630; // top row of page + x = 50; // Left side of page + y = 630; // Top row of page page_number = 2; - /* Create Page 2 of the report. This shows the drives smart data - */ + /* Create Page 2 of the report. This shows the drive's SMART data */ page = pdf_append_page( pdf ); - /* Create the header and footer for page 2, the start of the smart data */ - snprintf( page_title, sizeof( page_title ), "Page %i - Smart Data", page_number ); + /* Create the header and footer for page 2, the start of the SMART data */ + snprintf( page_title, sizeof( page_title ), "Page %i - SMART Data", page_number ); create_header_and_footer( c, page_title ); /* Read the output a line at a time - output it. */ while( fgets( result, sizeof( result ) - 1, fp ) != NULL ) { - /* Convert the label, i.e everything before the ':' to lower case, it's required to - * convert to lower case as smartctl seems to use inconsistent case when labeling - * for serial number, i.e mostly it produces labels "Serial Number:" but occasionally - * it produces a label "Serial number:" */ - + /* Convert the label (everything before ':') to lowercase */ idx = 0; while( result[idx] != 0 && result[idx] != ':' ) { - /* If upper case alpha character, change to lower case */ + /* If uppercase alpha character, change to lowercase */ if( result[idx] >= 'A' && result[idx] <= 'Z' ) { result[idx] += 32; @@ -921,7 +917,7 @@ int nwipe_get_smart_data( nwipe_context_t* c ) if( nwipe_options.quiet == 1 ) { - for( idx2 = 0; idx2 < 3; idx2++ ) + for( idx2 = 0; smartctl_labels_to_anonymize[idx2][0] != '\0'; idx2++ ) { if( strstr( result, &smartctl_labels_to_anonymize[idx2][0] ) ) { @@ -953,11 +949,12 @@ int nwipe_get_smart_data( nwipe_context_t* c ) page_number++; y = 630; - /* create the header and footer for the next page */ - snprintf( page_title, sizeof( page_title ), "Page %i - Smart Data", page_number ); + /* Create the header and footer for the next page */ + snprintf( page_title, sizeof( page_title ), "Page %i - SMART Data", page_number ); create_header_and_footer( c, page_title ); } } + pclose( fp ); set_return_value = 0; } } @@ -972,7 +969,7 @@ void create_header_and_footer( nwipe_context_t* c, char* page_title ) { /************************************************************************** * Create header and footer on most recently added page, with the exception - * of the green tick/red icon which is set from the 'status' section below. + * of the status icon which is set from the 'status' section below. */ pdf_add_text_wrap( pdf, NULL, pdf_footer, 12, 0, 30, PDF_BLACK, page_width, PDF_ALIGN_CENTER, &height ); pdf_add_line( pdf, NULL, 50, 50, 550, 50, 3, PDF_BLACK ); @@ -991,8 +988,8 @@ void create_header_and_footer( nwipe_context_t* c, char* page_title ) pdf_add_barcode( pdf, NULL, PDF_BARCODE_128A, 100, 790, 400, 25, barcode, PDF_BLACK ); /********************************************************** - * Display the appropriate status icon, top right on page on - * most recently added page. + * Display the appropriate status icon at the top right on + * the most recently added page. */ switch( status_icon ) { @@ -1010,7 +1007,7 @@ void create_header_and_footer( nwipe_context_t* c, char* page_title ) case STATUS_ICON_RED_CROSS: - // Display the red cross in the header + /* Display the red cross in the header */ pdf_add_image_data( pdf, NULL, 450, 665, 100, 100, bin2c_redcross_jpg, 60331 ); break; @@ -1019,3 +1016,169 @@ void create_header_and_footer( nwipe_context_t* c, char* page_title ) break; } } + +/* Function to generate a key pair and a self-signed certificate */ +int generate_key_and_certificate( EVP_PKEY** pkey, X509** x509 ) +{ + int ret = 0; + EVP_PKEY_CTX* pkey_ctx = NULL; + X509_NAME* name = NULL; + + /* Generate key */ + pkey_ctx = EVP_PKEY_CTX_new_id( EVP_PKEY_RSA, NULL ); + if( !pkey_ctx ) + { + ret = -1; + goto cleanup; + } + + if( EVP_PKEY_keygen_init( pkey_ctx ) <= 0 ) + { + ret = -1; + goto cleanup; + } + + if( EVP_PKEY_CTX_set_rsa_keygen_bits( pkey_ctx, 2048 ) <= 0 ) + { + ret = -1; + goto cleanup; + } + + if( EVP_PKEY_keygen( pkey_ctx, pkey ) <= 0 ) + { + ret = -1; + goto cleanup; + } + + /* Generate certificate */ + *x509 = X509_new(); + ASN1_INTEGER_set( X509_get_serialNumber( *x509 ), 1 ); + X509_gmtime_adj( X509_get_notBefore( *x509 ), 0 ); + X509_gmtime_adj( X509_get_notAfter( *x509 ), 31536000L ); /* Validity: 1 year */ + X509_set_pubkey( *x509, *pkey ); + + /* Set name */ + name = X509_get_subject_name( *x509 ); + X509_NAME_add_entry_by_txt( name, "C", MBSTRING_ASC, (unsigned char*) "DE", -1, -1, 0 ); + X509_NAME_add_entry_by_txt( name, "O", MBSTRING_ASC, (unsigned char*) "Nwipe", -1, -1, 0 ); + X509_NAME_add_entry_by_txt( name, "CN", MBSTRING_ASC, (unsigned char*) "Nwipe Certificate", -1, -1, 0 ); + + /* Self-signed */ + X509_set_issuer_name( *x509, name ); + + /* Sign certificate */ + if( !X509_sign( *x509, *pkey, EVP_sha256() ) ) + { + ret = -1; + goto cleanup; + } + + ret = 1; /* Success */ + +cleanup: + if( pkey_ctx ) + EVP_PKEY_CTX_free( pkey_ctx ); + if( ret != 1 ) + { + if( *pkey ) + EVP_PKEY_free( *pkey ); + if( *x509 ) + X509_free( *x509 ); + } + return ret; +} + +/* Function to sign the PDF */ +int sign_pdf( const char* pdf_filename, EVP_PKEY* pkey, unsigned char** signature, size_t* signature_len ) +{ + FILE* pdf_file = fopen( pdf_filename, "rb" ); + if( !pdf_file ) + { + perror( "Cannot open PDF file" ); + return -1; + } + + /* Read PDF file and compute hash */ + EVP_MD_CTX* md_ctx = EVP_MD_CTX_new(); + if( !md_ctx ) + { + perror( "Failed to create EVP_MD_CTX" ); + fclose( pdf_file ); + return -1; + } + + if( EVP_DigestSignInit( md_ctx, NULL, EVP_sha256(), NULL, pkey ) <= 0 ) + { + perror( "EVP_DigestSignInit failed" ); + EVP_MD_CTX_free( md_ctx ); + fclose( pdf_file ); + return -1; + } + + unsigned char buffer[4096]; + size_t bytes_read; + while( ( bytes_read = fread( buffer, 1, sizeof( buffer ), pdf_file ) ) > 0 ) + { + if( EVP_DigestSignUpdate( md_ctx, buffer, bytes_read ) <= 0 ) + { + perror( "EVP_DigestSignUpdate failed" ); + EVP_MD_CTX_free( md_ctx ); + fclose( pdf_file ); + return -1; + } + } + fclose( pdf_file ); + + /* Finalize signature */ + if( EVP_DigestSignFinal( md_ctx, NULL, signature_len ) <= 0 ) + { + perror( "EVP_DigestSignFinal (get length) failed" ); + EVP_MD_CTX_free( md_ctx ); + return -1; + } + + *signature = malloc( *signature_len ); + if( !*signature ) + { + perror( "Memory allocation failed for signature" ); + EVP_MD_CTX_free( md_ctx ); + return -1; + } + + if( EVP_DigestSignFinal( md_ctx, *signature, signature_len ) <= 0 ) + { + perror( "EVP_DigestSignFinal failed" ); + EVP_MD_CTX_free( md_ctx ); + free( *signature ); + return -1; + } + + EVP_MD_CTX_free( md_ctx ); + return 1; /* Success */ +} + +/* Function to add the signature to the PDF */ +void add_signature_to_pdf( struct pdf_doc* pdf, nwipe_context_t* c, unsigned char* signature, size_t signature_len ) +{ + char* signature_hex = malloc( signature_len * 2 + 1 ); + for( size_t i = 0; i < signature_len; i++ ) + { + sprintf( &signature_hex[i * 2], "%02x", signature[i] ); + } + signature_hex[signature_len * 2] = '\0'; + + /* Add a new page to display the signature */ + struct pdf_object* signature_page = pdf_append_page( pdf ); + + /* Create header and footer for the signature page */ + char page_title[50]; + snprintf( page_title, sizeof( page_title ), "Digital Signature" ); + create_header_and_footer( c, page_title ); + + /* Add signature as text */ + pdf_set_font( pdf, "Courier" ); + pdf_add_text( pdf, NULL, "Digital Signature (Hex):", 12, 50, 600, PDF_BLACK ); + pdf_add_text_wrap( pdf, NULL, signature_hex, 10, 50, 580, PDF_BLACK, 500, PDF_ALIGN_LEFT, &height ); + + free( signature_hex ); +} diff --git a/src/create_pdf.h b/src/create_pdf.h index 02086576..be894986 100644 --- a/src/create_pdf.h +++ b/src/create_pdf.h @@ -1,5 +1,5 @@ -/*. - * create_pdf.h: The header file for the pdf creation routines +/* + * create_pdf.h: The header file for the PDF creation routines * * Copyright https://github.com/PartialVolume/shredos.x86_64 * @@ -21,32 +21,71 @@ #ifndef CREATE_PDF_H_ #define CREATE_PDF_H_ +#include "nwipe.h" /* Include nwipe context */ +#include "PDFGen/pdfgen.h" /* Include PDFGen structures */ + +/* OpenSSL headers */ +#include +#include + #define MAX_PDF_FOOTER_TEXT_LENGTH 100 #define STATUS_ICON_GREEN_TICK 1 #define STATUS_ICON_YELLOW_EXCLAMATION 2 #define STATUS_ICON_RED_CROSS 3 -/* Additional colors that supplement the standard colors in pdfgen.h - */ -/*! Utility macro to provide gray */ +/* Additional colors that supplement the standard colors in pdfgen.h */ #define PDF_DARK_GREEN PDF_RGB( 0, 0x64, 0 ) - -/*! Utility macro to provide gray */ #define PDF_GRAY PDF_RGB( 0x5A, 0x5A, 0x5A ) - -/*! Utility macro to provide gray */ #define PDF_YELLOW PDF_RGB( 0xFF, 0xFF, 0x5A ) /** * Create the disk erase report in PDF format - * @param pointer to a drive context - * @return returns 0 on success < 1 on error + * @param ptr Pointer to a drive context + * @return Returns 0 on success, < 1 on error */ int create_pdf( nwipe_context_t* ptr ); -int nwipe_get_smart_data( nwipe_context_t* ); +/** + * Get SMART data and add it to the PDF + * @param c Pointer to nwipe context + * @return Returns 0 on success, non-zero on error + */ +int nwipe_get_smart_data( nwipe_context_t* c ); + +/** + * Create header and footer for the PDF pages + * @param c Pointer to nwipe context + * @param page_title Title of the page + */ +void create_header_and_footer( nwipe_context_t* c, char* page_title ); + +/* New functions for OpenSSL integration */ +/** + * Generate a key pair and a self-signed certificate + * @param pkey Pointer to store the generated EVP_PKEY + * @param x509 Pointer to store the generated X509 certificate + * @return Returns 1 on success, -1 on error + */ +int generate_key_and_certificate( EVP_PKEY** pkey, X509** x509 ); -void create_header_and_footer( nwipe_context_t*, char* ); +/** + * Sign the PDF with the generated private key + * @param pdf_filename Path to the PDF file + * @param pkey Private key used for signing + * @param signature Pointer to store the signature + * @param signature_len Pointer to store the length of the signature + * @return Returns 1 on success, -1 on error + */ +int sign_pdf( const char* pdf_filename, EVP_PKEY* pkey, unsigned char** signature, size_t* signature_len ); + +/** + * Add the signature to the PDF + * @param pdf Pointer to the PDF document + * @param c Pointer to nwipe context + * @param signature The signature data + * @param signature_len Length of the signature data + */ +void add_signature_to_pdf( struct pdf_doc* pdf, nwipe_context_t* c, unsigned char* signature, size_t signature_len ); #endif /* CREATE_PDF_H_ */ From 17858c2a769ab52e18b0e833a239dfad6ee9fcaf Mon Sep 17 00:00:00 2001 From: Fabian Druschke Date: Wed, 9 Oct 2024 21:50:52 +0200 Subject: [PATCH 2/3] Added QR code signature using qrencode library. --- configure.ac | 17 + src/create_pdf.c | 110 +- src/stb_image_write.h | 2228 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 2345 insertions(+), 10 deletions(-) create mode 100644 src/stb_image_write.h diff --git a/configure.ac b/configure.ac index 75103662..132e109d 100644 --- a/configure.ac +++ b/configure.ac @@ -85,6 +85,22 @@ PKG_CHECK_MODULES( ], [AC_MSG_ERROR([libconfig library not found])])] ) +PKG_CHECK_MODULES( + [QRENCODE], + [qrencode], + [ + CFLAGS="${CFLAGS} ${QRENCODE_CFLAGS}" + LIBS="${LIBS} ${QRENCODE_LIBS}" + ], + [AC_CHECK_LIB([qrencode], [QRcode_encodeString], [ + LIBS="-lqrencode $LIBS" + AC_CHECK_HEADERS(qrencode.h,, [ + AC_MSG_ERROR([QRencode headers not found]) + ]) + ], [AC_MSG_ERROR([QRencode library not found])] + )] +) + AC_CHECK_LIB([intl], [libintl_dgettext]) # needed to statically link libparted, but not given in its pkgconfig file AC_CHECK_LIB([uuid], [uuid_generate]) # needed to statically link libparted, but not given in its pkgconfig file PKG_CHECK_MODULES([PARTED], [libparted]) @@ -102,3 +118,4 @@ AC_FUNC_MALLOC AC_CHECK_FUNCS([fdatasync memset regcomp strdup strerror]) AC_OUTPUT + diff --git a/src/create_pdf.c b/src/create_pdf.c index e2ae10fe..9c63a4c8 100644 --- a/src/create_pdf.c +++ b/src/create_pdf.c @@ -50,6 +50,10 @@ #include #include #include +#include +#include +#define STB_IMAGE_WRITE_IMPLEMENTATION +#include "stb_image_write.h" #define text_size_data 10 @@ -1157,28 +1161,114 @@ int sign_pdf( const char* pdf_filename, EVP_PKEY* pkey, unsigned char** signatur return 1; /* Success */ } -/* Function to add the signature to the PDF */ void add_signature_to_pdf( struct pdf_doc* pdf, nwipe_context_t* c, unsigned char* signature, size_t signature_len ) { - char* signature_hex = malloc( signature_len * 2 + 1 ); - for( size_t i = 0; i < signature_len; i++ ) + /* Convert signature to Base64 */ + BIO *bio, *b64; + BUF_MEM* bufferPtr; + + /* Create a Base64 filter */ + b64 = BIO_new( BIO_f_base64() ); + bio = BIO_new( BIO_s_mem() ); /* Create a memory BIO */ + bio = BIO_push( b64, bio ); /* Chain the Base64 filter and memory BIO */ + + /* Write the signature into the BIO (this will be Base64 encoded) */ + BIO_write( bio, signature, signature_len ); + BIO_flush( bio ); /* Ensure all data is written */ + + /* Get a pointer to the memory buffer that contains the Base64-encoded data */ + BIO_get_mem_ptr( bio, &bufferPtr ); + + /* Allocate memory for the Base64-encoded text and copy it */ + char* b64text = (char*) malloc( bufferPtr->length + 1 ); + memcpy( b64text, bufferPtr->data, bufferPtr->length ); + b64text[bufferPtr->length] = '\0'; /* Null-terminate the string */ + + /* Free the BIOs */ + BIO_free_all( bio ); + + /* Generate a QR code from the Base64-encoded signature */ + QRcode* qrcode = QRcode_encodeString8bit( b64text, 0, QR_ECLEVEL_L ); + + if( !qrcode ) { - sprintf( &signature_hex[i * 2], "%02x", signature[i] ); + nwipe_log( NWIPE_LOG_ERROR, "Failed to generate QR code" ); + free( b64text ); + return; + } + + /* Scale the QR code */ + int qr_width = qrcode->width; + int scale = 10; /* Increase scaling factor to improve resolution */ + int img_width = qr_width * scale; + int img_height = qr_width * scale; + + /* Allocate memory for the image buffer */ + unsigned char* img_data = malloc( img_width * img_height ); + if( !img_data ) + { + nwipe_log( NWIPE_LOG_ERROR, "Failed to allocate memory for QR code image" ); + QRcode_free( qrcode ); + free( b64text ); + return; + } + + /* Initialize the image data (white background) */ + memset( img_data, 255, img_width * img_height ); + + /* Copy QR code data into the image buffer */ + for( int y = 0; y < qr_width; y++ ) + { + for( int x = 0; x < qr_width; x++ ) + { + if( qrcode->data[y * qr_width + x] & 1 ) + { + /* Set the corresponding pixels to black */ + for( int dy = 0; dy < scale; dy++ ) + { + for( int dx = 0; dx < scale; dx++ ) + { + int img_x = x * scale + dx; + int img_y = y * scale + dy; + img_data[img_y * img_width + img_x] = 0; + } + } + } + } + } + + /* Write the image data to PNG format in memory */ + int png_len; + unsigned char* png_data = stbi_write_png_to_mem( img_data, img_width, img_width, img_height, 1, &png_len ); + + if( !png_data ) + { + nwipe_log( NWIPE_LOG_ERROR, "Failed to write QR code image to PNG format" ); + free( img_data ); + QRcode_free( qrcode ); + free( b64text ); + return; } - signature_hex[signature_len * 2] = '\0'; /* Add a new page to display the signature */ struct pdf_object* signature_page = pdf_append_page( pdf ); /* Create header and footer for the signature page */ char page_title[50]; - snprintf( page_title, sizeof( page_title ), "Digital Signature" ); + snprintf( page_title, sizeof( page_title ), "Signature" ); create_header_and_footer( c, page_title ); - /* Add signature as text */ + /* Add the QR code image to the PDF */ + pdf_add_image_data( pdf, NULL, 50, 200, 200, 200, png_data, png_len ); + + /* Optionally: Add the Base64-encoded signature as text */ pdf_set_font( pdf, "Courier" ); - pdf_add_text( pdf, NULL, "Digital Signature (Hex):", 12, 50, 600, PDF_BLACK ); - pdf_add_text_wrap( pdf, NULL, signature_hex, 10, 50, 580, PDF_BLACK, 500, PDF_ALIGN_LEFT, &height ); + pdf_add_text( pdf, NULL, "Digital Signature (Base64):", 12, 50, 600, PDF_BLACK ); + pdf_add_text_wrap( pdf, NULL, b64text, 10, 50, 580, PDF_BLACK, 500, PDF_ALIGN_LEFT, &height ); - free( signature_hex ); + /* Free resources */ + free( png_data ); + free( img_data ); + QRcode_free( qrcode ); + free( b64text ); } diff --git a/src/stb_image_write.h b/src/stb_image_write.h new file mode 100644 index 00000000..650ecf74 --- /dev/null +++ b/src/stb_image_write.h @@ -0,0 +1,2228 @@ +/* stb_image_write - v1.16 - public domain - http://nothings.org/stb + writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 + no warranty implied; use at your own risk + + Before #including, + + #define STB_IMAGE_WRITE_IMPLEMENTATION + + in the file that you want to have the implementation. + + Will probably not work correctly with strict-aliasing optimizations. + +ABOUT: + + This header file is a library for writing images to C stdio or a callback. + + The PNG output is not optimal; it is 20-50% larger than the file + written by a decent optimizing implementation; though providing a custom + zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. + This library is designed for source code compactness and simplicity, + not optimal image file size or run-time performance. + +BUILDING: + + You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. + You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace + malloc,realloc,free. + You can #define STBIW_MEMMOVE() to replace memmove() + You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function + for PNG compression (instead of the builtin one), it must have the following signature: + unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); + The returned data will be freed with STBIW_FREE() (free() by default), + so it must be heap allocated with STBIW_MALLOC() (malloc() by default), + +UNICODE: + + If compiling for Windows and you wish to use Unicode filenames, compile + with + #define STBIW_WINDOWS_UTF8 + and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert + Windows wchar_t filenames to utf8. + +USAGE: + + There are five functions, one for each image file format: + + int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); + int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); + + void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically + + There are also five equivalent functions that use an arbitrary write function. You are + expected to open/close your file-equivalent before and after calling these: + + int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int +stride_in_bytes); int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void +*data); int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); int +stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); int +stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + + where the callback is: + void stbi_write_func(void *context, void *data, int size); + + You can configure it with these global variables: + int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE + int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression + int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode + + + You can define STBI_WRITE_NO_STDIO to disable the file variant of these + functions, so the library will not use stdio.h at all. However, this will + also disable HDR writing, because it requires stdio for formatted output. + + Each function returns 0 on failure and non-0 on success. + + The functions create an image file defined by the parameters. The image + is a rectangle of pixels stored from left-to-right, top-to-bottom. + Each pixel contains 'comp' channels of data stored interleaved with 8-bits + per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is + monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. + The *data pointer points to the first byte of the top-left-most pixel. + For PNG, "stride_in_bytes" is the distance in bytes from the first byte of + a row of pixels to the first byte of the next row of pixels. + + PNG creates output files with the same number of components as the input. + The BMP format expands Y to RGB in the file format and does not + output alpha. + + PNG supports writing rectangles of data even when the bytes storing rows of + data are not consecutive in memory (e.g. sub-rectangles of a larger image), + by supplying the stride between the beginning of adjacent rows. The other + formats do not. (Thus you cannot write a native-format BMP through the BMP + writer, both because it is in BGR order and because it may have padding + at the end of the line.) + + PNG allows you to set the deflate compression level by setting the global + variable 'stbi_write_png_compression_level' (it defaults to 8). + + HDR expects linear float data. Since the format is always 32-bit rgb(e) + data, alpha (if provided) is discarded, and for monochrome data it is + replicated across all three channels. + + TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed + data, set the global variable 'stbi_write_tga_with_rle' to 0. + + JPEG does ignore alpha channels in input data; quality is between 1 and 100. + Higher quality looks better but results in a bigger image. + JPEG baseline (no JPEG progressive). + +CREDITS: + + + Sean Barrett - PNG/BMP/TGA + Baldur Karlsson - HDR + Jean-Sebastien Guay - TGA monochrome + Tim Kelsey - misc enhancements + Alan Hickman - TGA RLE + Emmanuel Julien - initial file IO callback implementation + Jon Olick - original jo_jpeg.cpp code + Daniel Gibson - integrate JPEG, allow external zlib + Aarni Koskela - allow choosing PNG filter + + bugfixes: + github:Chribba + Guillaume Chereau + github:jry2 + github:romigrou + Sergio Gonzalez + Jonas Karlsson + Filip Wasil + Thatcher Ulrich + github:poppolopoppo + Patrick Boettcher + github:xeekworx + Cap Petschulat + Simon Rodriguez + Ivan Tikhonov + github:ignotion + Adam Schackart + Andrew Kensler + +LICENSE + + See end of file for license information. + +*/ + +#ifndef INCLUDE_STB_IMAGE_WRITE_H +#define INCLUDE_STB_IMAGE_WRITE_H + +#include + +// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' +#ifndef STBIWDEF +#ifdef STB_IMAGE_WRITE_STATIC +#define STBIWDEF static +#else +#ifdef __cplusplus +#define STBIWDEF extern "C" +#else +#define STBIWDEF extern +#endif +#endif +#endif + +#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations +STBIWDEF int stbi_write_tga_with_rle; +STBIWDEF int stbi_write_png_compression_level; +STBIWDEF int stbi_write_force_png_filter; +#endif + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png( char const* filename, int w, int h, int comp, const void* data, int stride_in_bytes ); +STBIWDEF int stbi_write_bmp( char const* filename, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_tga( char const* filename, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_hdr( char const* filename, int w, int h, int comp, const float* data ); +STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ); + +#ifdef STBIW_WINDOWS_UTF8 +STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ); +#endif +#endif + +typedef void stbi_write_func( void* context, void* data, int size ); + +STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, + void* context, + int w, + int h, + int comp, + const void* data, + int stride_in_bytes ); +STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const float* data ); +STBIWDEF int +stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ); + +STBIWDEF void stbi_flip_vertically_on_write( int flip_boolean ); + +#endif // INCLUDE_STB_IMAGE_WRITE_H + +#ifdef STB_IMAGE_WRITE_IMPLEMENTATION + +#ifdef _WIN32 +#ifndef _CRT_SECURE_NO_WARNINGS +#define _CRT_SECURE_NO_WARNINGS +#endif +#ifndef _CRT_NONSTDC_NO_DEPRECATE +#define _CRT_NONSTDC_NO_DEPRECATE +#endif +#endif + +#ifndef STBI_WRITE_NO_STDIO +#include +#endif // STBI_WRITE_NO_STDIO + +#include +#include +#include +#include + +#if defined( STBIW_MALLOC ) && defined( STBIW_FREE ) && ( defined( STBIW_REALLOC ) || defined( STBIW_REALLOC_SIZED ) ) +// ok +#elif !defined( STBIW_MALLOC ) && !defined( STBIW_FREE ) && !defined( STBIW_REALLOC ) && !defined( STBIW_REALLOC_SIZED ) +// ok +#else +#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." +#endif + +#ifndef STBIW_MALLOC +#define STBIW_MALLOC( sz ) malloc( sz ) +#define STBIW_REALLOC( p, newsz ) realloc( p, newsz ) +#define STBIW_FREE( p ) free( p ) +#endif + +#ifndef STBIW_REALLOC_SIZED +#define STBIW_REALLOC_SIZED( p, oldsz, newsz ) STBIW_REALLOC( p, newsz ) +#endif + +#ifndef STBIW_MEMMOVE +#define STBIW_MEMMOVE( a, b, sz ) memmove( a, b, sz ) +#endif + +#ifndef STBIW_ASSERT +#include +#define STBIW_ASSERT( x ) assert( x ) +#endif + +#define STBIW_UCHAR( x ) (unsigned char) ( ( x ) & 0xff ) + +#ifdef STB_IMAGE_WRITE_STATIC +static int stbi_write_png_compression_level = 8; +static int stbi_write_tga_with_rle = 1; +static int stbi_write_force_png_filter = -1; +#else +int stbi_write_png_compression_level = 8; +int stbi_write_tga_with_rle = 1; +int stbi_write_force_png_filter = -1; +#endif + +static int stbi__flip_vertically_on_write = 0; + +STBIWDEF void stbi_flip_vertically_on_write( int flag ) +{ + stbi__flip_vertically_on_write = flag; +} + +typedef struct +{ + stbi_write_func* func; + void* context; + unsigned char buffer[64]; + int buf_used; +} stbi__write_context; + +// initialize a callback-based context +static void stbi__start_write_callbacks( stbi__write_context* s, stbi_write_func* c, void* context ) +{ + s->func = c; + s->context = context; +} + +#ifndef STBI_WRITE_NO_STDIO + +static void stbi__stdio_write( void* context, void* data, int size ) +{ + fwrite( data, 1, size, (FILE*) context ); +} + +#if defined( _WIN32 ) && defined( STBIW_WINDOWS_UTF8 ) +#ifdef __cplusplus +#define STBIW_EXTERN extern "C" +#else +#define STBIW_EXTERN extern +#endif +STBIW_EXTERN __declspec( dllimport ) int __stdcall MultiByteToWideChar( unsigned int cp, + unsigned long flags, + const char* str, + int cbmb, + wchar_t* widestr, + int cchwide ); +STBIW_EXTERN __declspec( dllimport ) int __stdcall WideCharToMultiByte( unsigned int cp, + unsigned long flags, + const wchar_t* widestr, + int cchwide, + char* str, + int cbmb, + const char* defchar, + int* used_default ); + +STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ) +{ + return WideCharToMultiByte( 65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL ); +} +#endif + +static FILE* stbiw__fopen( char const* filename, char const* mode ) +{ + FILE* f; +#if defined( _WIN32 ) && defined( STBIW_WINDOWS_UTF8 ) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if( 0 + == MultiByteToWideChar( + 65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof( wFilename ) / sizeof( *wFilename ) ) ) + return 0; + + if( 0 == MultiByteToWideChar( 65001 /* UTF8 */, 0, mode, -1, wMode, sizeof( wMode ) / sizeof( *wMode ) ) ) + return 0; + +#if defined( _MSC_VER ) && _MSC_VER >= 1400 + if( 0 != _wfopen_s( &f, wFilename, wMode ) ) + f = 0; +#else + f = _wfopen( wFilename, wMode ); +#endif + +#elif defined( _MSC_VER ) && _MSC_VER >= 1400 + if( 0 != fopen_s( &f, filename, mode ) ) + f = 0; +#else + f = fopen( filename, mode ); +#endif + return f; +} + +static int stbi__start_write_file( stbi__write_context* s, const char* filename ) +{ + FILE* f = stbiw__fopen( filename, "wb" ); + stbi__start_write_callbacks( s, stbi__stdio_write, (void*) f ); + return f != NULL; +} + +static void stbi__end_write_file( stbi__write_context* s ) +{ + fclose( (FILE*) s->context ); +} + +#endif // !STBI_WRITE_NO_STDIO + +typedef unsigned int stbiw_uint32; +typedef int stb_image_write_test[sizeof( stbiw_uint32 ) == 4 ? 1 : -1]; + +static void stbiw__writefv( stbi__write_context* s, const char* fmt, va_list v ) +{ + while( *fmt ) + { + switch( *fmt++ ) + { + case ' ': + break; + case '1': { + unsigned char x = STBIW_UCHAR( va_arg( v, int ) ); + s->func( s->context, &x, 1 ); + break; + } + case '2': { + int x = va_arg( v, int ); + unsigned char b[2]; + b[0] = STBIW_UCHAR( x ); + b[1] = STBIW_UCHAR( x >> 8 ); + s->func( s->context, b, 2 ); + break; + } + case '4': { + stbiw_uint32 x = va_arg( v, int ); + unsigned char b[4]; + b[0] = STBIW_UCHAR( x ); + b[1] = STBIW_UCHAR( x >> 8 ); + b[2] = STBIW_UCHAR( x >> 16 ); + b[3] = STBIW_UCHAR( x >> 24 ); + s->func( s->context, b, 4 ); + break; + } + default: + STBIW_ASSERT( 0 ); + return; + } + } +} + +static void stbiw__writef( stbi__write_context* s, const char* fmt, ... ) +{ + va_list v; + va_start( v, fmt ); + stbiw__writefv( s, fmt, v ); + va_end( v ); +} + +static void stbiw__write_flush( stbi__write_context* s ) +{ + if( s->buf_used ) + { + s->func( s->context, &s->buffer, s->buf_used ); + s->buf_used = 0; + } +} + +static void stbiw__putc( stbi__write_context* s, unsigned char c ) +{ + s->func( s->context, &c, 1 ); +} + +static void stbiw__write1( stbi__write_context* s, unsigned char a ) +{ + if( (size_t) s->buf_used + 1 > sizeof( s->buffer ) ) + stbiw__write_flush( s ); + s->buffer[s->buf_used++] = a; +} + +static void stbiw__write3( stbi__write_context* s, unsigned char a, unsigned char b, unsigned char c ) +{ + int n; + if( (size_t) s->buf_used + 3 > sizeof( s->buffer ) ) + stbiw__write_flush( s ); + n = s->buf_used; + s->buf_used = n + 3; + s->buffer[n + 0] = a; + s->buffer[n + 1] = b; + s->buffer[n + 2] = c; +} + +static void +stbiw__write_pixel( stbi__write_context* s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char* d ) +{ + unsigned char bg[3] = { 255, 0, 255 }, px[3]; + int k; + + if( write_alpha < 0 ) + stbiw__write1( s, d[comp - 1] ); + + switch( comp ) + { + case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case + case 1: + if( expand_mono ) + stbiw__write3( s, d[0], d[0], d[0] ); // monochrome bmp + else + stbiw__write1( s, d[0] ); // monochrome TGA + break; + case 4: + if( !write_alpha ) + { + // composite against pink background + for( k = 0; k < 3; ++k ) + px[k] = bg[k] + ( ( d[k] - bg[k] ) * d[3] ) / 255; + stbiw__write3( s, px[1 - rgb_dir], px[1], px[1 + rgb_dir] ); + break; + } + /* FALLTHROUGH */ + case 3: + stbiw__write3( s, d[1 - rgb_dir], d[1], d[1 + rgb_dir] ); + break; + } + if( write_alpha > 0 ) + stbiw__write1( s, d[comp - 1] ); +} + +static void stbiw__write_pixels( stbi__write_context* s, + int rgb_dir, + int vdir, + int x, + int y, + int comp, + void* data, + int write_alpha, + int scanline_pad, + int expand_mono ) +{ + stbiw_uint32 zero = 0; + int i, j, j_end; + + if( y <= 0 ) + return; + + if( stbi__flip_vertically_on_write ) + vdir *= -1; + + if( vdir < 0 ) + { + j_end = -1; + j = y - 1; + } + else + { + j_end = y; + j = 0; + } + + for( ; j != j_end; j += vdir ) + { + for( i = 0; i < x; ++i ) + { + unsigned char* d = (unsigned char*) data + ( j * x + i ) * comp; + stbiw__write_pixel( s, rgb_dir, comp, write_alpha, expand_mono, d ); + } + stbiw__write_flush( s ); + s->func( s->context, &zero, scanline_pad ); + } +} + +static int stbiw__outfile( stbi__write_context* s, + int rgb_dir, + int vdir, + int x, + int y, + int comp, + int expand_mono, + void* data, + int alpha, + int pad, + const char* fmt, + ... ) +{ + if( y < 0 || x < 0 ) + { + return 0; + } + else + { + va_list v; + va_start( v, fmt ); + stbiw__writefv( s, fmt, v ); + va_end( v ); + stbiw__write_pixels( s, rgb_dir, vdir, x, y, comp, data, alpha, pad, expand_mono ); + return 1; + } +} + +static int stbi_write_bmp_core( stbi__write_context* s, int x, int y, int comp, const void* data ) +{ + if( comp != 4 ) + { + // write RGB bitmap + int pad = ( -x * 3 ) & 3; + return stbiw__outfile( s, + -1, + -1, + x, + y, + comp, + 1, + (void*) data, + 0, + pad, + "11 4 22 4" + "4 44 22 444444", + 'B', + 'M', + 14 + 40 + ( x * 3 + pad ) * y, + 0, + 0, + 14 + 40, // file header + 40, + x, + y, + 1, + 24, + 0, + 0, + 0, + 0, + 0, + 0 ); // bitmap header + } + else + { + // RGBA bitmaps need a v4 header + // use BI_BITFIELDS mode with 32bpp and alpha mask + // (straight BI_RGB with alpha mask doesn't work in most readers) + return stbiw__outfile( s, + -1, + -1, + x, + y, + comp, + 1, + (void*) data, + 1, + 0, + "11 4 22 4" + "4 44 22 444444 4444 4 444 444 444 444", + 'B', + 'M', + 14 + 108 + x * y * 4, + 0, + 0, + 14 + 108, // file header + 108, + x, + y, + 1, + 32, + 3, + 0, + 0, + 0, + 0, + 0, + 0xff0000, + 0xff00, + 0xff, + 0xff000000u, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0 ); // bitmap V4 header + } +} + +STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_bmp_core( &s, x, y, comp, data ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_bmp( char const* filename, int x, int y, int comp, const void* data ) +{ + stbi__write_context s = { 0 }; + if( stbi__start_write_file( &s, filename ) ) + { + int r = stbi_write_bmp_core( &s, x, y, comp, data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif //! STBI_WRITE_NO_STDIO + +static int stbi_write_tga_core( stbi__write_context* s, int x, int y, int comp, void* data ) +{ + int has_alpha = ( comp == 2 || comp == 4 ); + int colorbytes = has_alpha ? comp - 1 : comp; + int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 + + if( y < 0 || x < 0 ) + return 0; + + if( !stbi_write_tga_with_rle ) + { + return stbiw__outfile( s, + -1, + -1, + x, + y, + comp, + 0, + (void*) data, + has_alpha, + 0, + "111 221 2222 11", + 0, + 0, + format, + 0, + 0, + 0, + 0, + 0, + x, + y, + ( colorbytes + has_alpha ) * 8, + has_alpha * 8 ); + } + else + { + int i, j, k; + int jend, jdir; + + stbiw__writef( s, + "111 221 2222 11", + 0, + 0, + format + 8, + 0, + 0, + 0, + 0, + 0, + x, + y, + ( colorbytes + has_alpha ) * 8, + has_alpha * 8 ); + + if( stbi__flip_vertically_on_write ) + { + j = 0; + jend = y; + jdir = 1; + } + else + { + j = y - 1; + jend = -1; + jdir = -1; + } + for( ; j != jend; j += jdir ) + { + unsigned char* row = (unsigned char*) data + j * x * comp; + int len; + + for( i = 0; i < x; i += len ) + { + unsigned char* begin = row + i * comp; + int diff = 1; + len = 1; + + if( i < x - 1 ) + { + ++len; + diff = memcmp( begin, row + ( i + 1 ) * comp, comp ); + if( diff ) + { + const unsigned char* prev = begin; + for( k = i + 2; k < x && len < 128; ++k ) + { + if( memcmp( prev, row + k * comp, comp ) ) + { + prev += comp; + ++len; + } + else + { + --len; + break; + } + } + } + else + { + for( k = i + 2; k < x && len < 128; ++k ) + { + if( !memcmp( begin, row + k * comp, comp ) ) + { + ++len; + } + else + { + break; + } + } + } + } + + if( diff ) + { + unsigned char header = STBIW_UCHAR( len - 1 ); + stbiw__write1( s, header ); + for( k = 0; k < len; ++k ) + { + stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin + k * comp ); + } + } + else + { + unsigned char header = STBIW_UCHAR( len - 129 ); + stbiw__write1( s, header ); + stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin ); + } + } + } + stbiw__write_flush( s ); + } + return 1; +} + +STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_tga_core( &s, x, y, comp, (void*) data ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_tga( char const* filename, int x, int y, int comp, const void* data ) +{ + stbi__write_context s = { 0 }; + if( stbi__start_write_file( &s, filename ) ) + { + int r = stbi_write_tga_core( &s, x, y, comp, (void*) data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR writer +// by Baldur Karlsson + +#define stbiw__max( a, b ) ( ( a ) > ( b ) ? ( a ) : ( b ) ) + +#ifndef STBI_WRITE_NO_STDIO + +static void stbiw__linear_to_rgbe( unsigned char* rgbe, float* linear ) +{ + int exponent; + float maxcomp = stbiw__max( linear[0], stbiw__max( linear[1], linear[2] ) ); + + if( maxcomp < 1e-32f ) + { + rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; + } + else + { + float normalize = (float) frexp( maxcomp, &exponent ) * 256.0f / maxcomp; + + rgbe[0] = (unsigned char) ( linear[0] * normalize ); + rgbe[1] = (unsigned char) ( linear[1] * normalize ); + rgbe[2] = (unsigned char) ( linear[2] * normalize ); + rgbe[3] = (unsigned char) ( exponent + 128 ); + } +} + +static void stbiw__write_run_data( stbi__write_context* s, int length, unsigned char databyte ) +{ + unsigned char lengthbyte = STBIW_UCHAR( length + 128 ); + STBIW_ASSERT( length + 128 <= 255 ); + s->func( s->context, &lengthbyte, 1 ); + s->func( s->context, &databyte, 1 ); +} + +static void stbiw__write_dump_data( stbi__write_context* s, int length, unsigned char* data ) +{ + unsigned char lengthbyte = STBIW_UCHAR( length ); + STBIW_ASSERT( length <= 128 ); // inconsistent with spec but consistent with official code + s->func( s->context, &lengthbyte, 1 ); + s->func( s->context, data, length ); +} + +static void +stbiw__write_hdr_scanline( stbi__write_context* s, int width, int ncomp, unsigned char* scratch, float* scanline ) +{ + unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; + unsigned char rgbe[4]; + float linear[3]; + int x; + + scanlineheader[2] = ( width & 0xff00 ) >> 8; + scanlineheader[3] = ( width & 0x00ff ); + + /* skip RLE for images too small or large */ + if( width < 8 || width >= 32768 ) + { + for( x = 0; x < width; x++ ) + { + switch( ncomp ) + { + case 4: /* fallthrough */ + case 3: + linear[2] = scanline[x * ncomp + 2]; + linear[1] = scanline[x * ncomp + 1]; + linear[0] = scanline[x * ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; + break; + } + stbiw__linear_to_rgbe( rgbe, linear ); + s->func( s->context, rgbe, 4 ); + } + } + else + { + int c, r; + /* encode into scratch buffer */ + for( x = 0; x < width; x++ ) + { + switch( ncomp ) + { + case 4: /* fallthrough */ + case 3: + linear[2] = scanline[x * ncomp + 2]; + linear[1] = scanline[x * ncomp + 1]; + linear[0] = scanline[x * ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; + break; + } + stbiw__linear_to_rgbe( rgbe, linear ); + scratch[x + width * 0] = rgbe[0]; + scratch[x + width * 1] = rgbe[1]; + scratch[x + width * 2] = rgbe[2]; + scratch[x + width * 3] = rgbe[3]; + } + + s->func( s->context, scanlineheader, 4 ); + + /* RLE each component separately */ + for( c = 0; c < 4; c++ ) + { + unsigned char* comp = &scratch[width * c]; + + x = 0; + while( x < width ) + { + // find first run + r = x; + while( r + 2 < width ) + { + if( comp[r] == comp[r + 1] && comp[r] == comp[r + 2] ) + break; + ++r; + } + if( r + 2 >= width ) + r = width; + // dump up to first run + while( x < r ) + { + int len = r - x; + if( len > 128 ) + len = 128; + stbiw__write_dump_data( s, len, &comp[x] ); + x += len; + } + // if there's a run, output it + if( r + 2 < width ) + { // same test as what we break out of in search loop, so only true if we break'd + // find next byte after run + while( r < width && comp[r] == comp[x] ) + ++r; + // output run up to r + while( x < r ) + { + int len = r - x; + if( len > 127 ) + len = 127; + stbiw__write_run_data( s, len, comp[x] ); + x += len; + } + } + } + } + } +} + +static int stbi_write_hdr_core( stbi__write_context* s, int x, int y, int comp, float* data ) +{ + if( y <= 0 || x <= 0 || data == NULL ) + return 0; + else + { + // Each component is stored separately. Allocate scratch space for full output scanline. + unsigned char* scratch = (unsigned char*) STBIW_MALLOC( x * 4 ); + int i, len; + char buffer[128]; + char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; + s->func( s->context, header, sizeof( header ) - 1 ); + +#ifdef __STDC_LIB_EXT1__ + len = sprintf_s( buffer, sizeof( buffer ), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); +#else + len = sprintf( buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); +#endif + s->func( s->context, buffer, len ); + + for( i = 0; i < y; i++ ) + stbiw__write_hdr_scanline( + s, x, comp, scratch, data + comp * x * ( stbi__flip_vertically_on_write ? y - 1 - i : i ) ); + STBIW_FREE( scratch ); + return 1; + } +} + +STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const float* data ) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_hdr_core( &s, x, y, comp, (float*) data ); +} + +STBIWDEF int stbi_write_hdr( char const* filename, int x, int y, int comp, const float* data ) +{ + stbi__write_context s = { 0 }; + if( stbi__start_write_file( &s, filename ) ) + { + int r = stbi_write_hdr_core( &s, x, y, comp, (float*) data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif // STBI_WRITE_NO_STDIO + +////////////////////////////////////////////////////////////////////////////// +// +// PNG writer +// + +#ifndef STBIW_ZLIB_COMPRESS +// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() +#define stbiw__sbraw( a ) ( (int*) (void*) ( a ) - 2 ) +#define stbiw__sbm( a ) stbiw__sbraw( a )[0] +#define stbiw__sbn( a ) stbiw__sbraw( a )[1] + +#define stbiw__sbneedgrow( a, n ) ( ( a ) == 0 || stbiw__sbn( a ) + n >= stbiw__sbm( a ) ) +#define stbiw__sbmaybegrow( a, n ) ( stbiw__sbneedgrow( a, ( n ) ) ? stbiw__sbgrow( a, n ) : 0 ) +#define stbiw__sbgrow( a, n ) stbiw__sbgrowf( (void**) &( a ), ( n ), sizeof( *( a ) ) ) + +#define stbiw__sbpush( a, v ) ( stbiw__sbmaybegrow( a, 1 ), ( a )[stbiw__sbn( a )++] = ( v ) ) +#define stbiw__sbcount( a ) ( ( a ) ? stbiw__sbn( a ) : 0 ) +#define stbiw__sbfree( a ) ( ( a ) ? STBIW_FREE( stbiw__sbraw( a ) ), 0 : 0 ) + +static void* stbiw__sbgrowf( void** arr, int increment, int itemsize ) +{ + int m = *arr ? 2 * stbiw__sbm( *arr ) + increment : increment + 1; + void* p = STBIW_REALLOC_SIZED( *arr ? stbiw__sbraw( *arr ) : 0, + *arr ? ( stbiw__sbm( *arr ) * itemsize + sizeof( int ) * 2 ) : 0, + itemsize * m + sizeof( int ) * 2 ); + STBIW_ASSERT( p ); + if( p ) + { + if( !*arr ) + ( (int*) p )[1] = 0; + *arr = (void*) ( (int*) p + 2 ); + stbiw__sbm( *arr ) = m; + } + return *arr; +} + +static unsigned char* stbiw__zlib_flushf( unsigned char* data, unsigned int* bitbuffer, int* bitcount ) +{ + while( *bitcount >= 8 ) + { + stbiw__sbpush( data, STBIW_UCHAR( *bitbuffer ) ); + *bitbuffer >>= 8; + *bitcount -= 8; + } + return data; +} + +static int stbiw__zlib_bitrev( int code, int codebits ) +{ + int res = 0; + while( codebits-- ) + { + res = ( res << 1 ) | ( code & 1 ); + code >>= 1; + } + return res; +} + +static unsigned int stbiw__zlib_countm( unsigned char* a, unsigned char* b, int limit ) +{ + int i; + for( i = 0; i < limit && i < 258; ++i ) + if( a[i] != b[i] ) + break; + return i; +} + +static unsigned int stbiw__zhash( unsigned char* data ) +{ + stbiw_uint32 hash = data[0] + ( data[1] << 8 ) + ( data[2] << 16 ); + hash ^= hash << 3; + hash += hash >> 5; + hash ^= hash << 4; + hash += hash >> 17; + hash ^= hash << 25; + hash += hash >> 6; + return hash; +} + +#define stbiw__zlib_flush() ( out = stbiw__zlib_flushf( out, &bitbuf, &bitcount ) ) +#define stbiw__zlib_add( code, codebits ) \ + ( bitbuf |= ( code ) << bitcount, bitcount += ( codebits ), stbiw__zlib_flush() ) +#define stbiw__zlib_huffa( b, c ) stbiw__zlib_add( stbiw__zlib_bitrev( b, c ), c ) +// default huffman tables +#define stbiw__zlib_huff1( n ) stbiw__zlib_huffa( 0x30 + ( n ), 8 ) +#define stbiw__zlib_huff2( n ) stbiw__zlib_huffa( 0x190 + ( n ) - 144, 9 ) +#define stbiw__zlib_huff3( n ) stbiw__zlib_huffa( 0 + ( n ) - 256, 7 ) +#define stbiw__zlib_huff4( n ) stbiw__zlib_huffa( 0xc0 + ( n ) - 280, 8 ) +#define stbiw__zlib_huff( n ) \ + ( ( n ) <= 143 ? stbiw__zlib_huff1( n ) \ + : ( n ) <= 255 ? stbiw__zlib_huff2( n ) \ + : ( n ) <= 279 ? stbiw__zlib_huff3( n ) \ + : stbiw__zlib_huff4( n ) ) +#define stbiw__zlib_huffb( n ) ( ( n ) <= 143 ? stbiw__zlib_huff1( n ) : stbiw__zlib_huff2( n ) ) + +#define stbiw__ZHASH 16384 + +#endif // STBIW_ZLIB_COMPRESS + +STBIWDEF unsigned char* stbi_zlib_compress( unsigned char* data, int data_len, int* out_len, int quality ) +{ +#ifdef STBIW_ZLIB_COMPRESS + // user provided a zlib compress implementation, use that + return STBIW_ZLIB_COMPRESS( data, data_len, out_len, quality ); +#else // use builtin + static unsigned short lengthc[] = { 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, + 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 259 }; + static unsigned char lengtheb[] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, + 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 }; + static unsigned short distc[] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, + 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, + 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 32768 }; + static unsigned char disteb[] = { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, + 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13 }; + unsigned int bitbuf = 0; + int i, j, bitcount = 0; + unsigned char* out = NULL; + unsigned char*** hash_table = (unsigned char***) STBIW_MALLOC( stbiw__ZHASH * sizeof( unsigned char** ) ); + if( hash_table == NULL ) + return NULL; + if( quality < 5 ) + quality = 5; + + stbiw__sbpush( out, 0x78 ); // DEFLATE 32K window + stbiw__sbpush( out, 0x5e ); // FLEVEL = 1 + stbiw__zlib_add( 1, 1 ); // BFINAL = 1 + stbiw__zlib_add( 1, 2 ); // BTYPE = 1 -- fixed huffman + + for( i = 0; i < stbiw__ZHASH; ++i ) + hash_table[i] = NULL; + + i = 0; + while( i < data_len - 3 ) + { + // hash next 3 bytes of data to be compressed + int h = stbiw__zhash( data + i ) & ( stbiw__ZHASH - 1 ), best = 3; + unsigned char* bestloc = 0; + unsigned char** hlist = hash_table[h]; + int n = stbiw__sbcount( hlist ); + for( j = 0; j < n; ++j ) + { + if( hlist[j] - data > i - 32768 ) + { // if entry lies within window + int d = stbiw__zlib_countm( hlist[j], data + i, data_len - i ); + if( d >= best ) + { + best = d; + bestloc = hlist[j]; + } + } + } + // when hash table entry is too long, delete half the entries + if( hash_table[h] && stbiw__sbn( hash_table[h] ) == 2 * quality ) + { + STBIW_MEMMOVE( hash_table[h], hash_table[h] + quality, sizeof( hash_table[h][0] ) * quality ); + stbiw__sbn( hash_table[h] ) = quality; + } + stbiw__sbpush( hash_table[h], data + i ); + + if( bestloc ) + { + // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal + h = stbiw__zhash( data + i + 1 ) & ( stbiw__ZHASH - 1 ); + hlist = hash_table[h]; + n = stbiw__sbcount( hlist ); + for( j = 0; j < n; ++j ) + { + if( hlist[j] - data > i - 32767 ) + { + int e = stbiw__zlib_countm( hlist[j], data + i + 1, data_len - i - 1 ); + if( e > best ) + { // if next match is better, bail on current match + bestloc = NULL; + break; + } + } + } + } + + if( bestloc ) + { + int d = (int) ( data + i - bestloc ); // distance back + STBIW_ASSERT( d <= 32767 && best <= 258 ); + for( j = 0; best > lengthc[j + 1] - 1; ++j ) + ; + stbiw__zlib_huff( j + 257 ); + if( lengtheb[j] ) + stbiw__zlib_add( best - lengthc[j], lengtheb[j] ); + for( j = 0; d > distc[j + 1] - 1; ++j ) + ; + stbiw__zlib_add( stbiw__zlib_bitrev( j, 5 ), 5 ); + if( disteb[j] ) + stbiw__zlib_add( d - distc[j], disteb[j] ); + i += best; + } + else + { + stbiw__zlib_huffb( data[i] ); + ++i; + } + } + // write out final bytes + for( ; i < data_len; ++i ) + stbiw__zlib_huffb( data[i] ); + stbiw__zlib_huff( 256 ); // end of block + // pad with 0 bits to byte boundary + while( bitcount ) + stbiw__zlib_add( 0, 1 ); + + for( i = 0; i < stbiw__ZHASH; ++i ) + (void) stbiw__sbfree( hash_table[i] ); + STBIW_FREE( hash_table ); + + // store uncompressed instead if compression was worse + if( stbiw__sbn( out ) > data_len + 2 + ( ( data_len + 32766 ) / 32767 ) * 5 ) + { + stbiw__sbn( out ) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1 + for( j = 0; j < data_len; ) + { + int blocklen = data_len - j; + if( blocklen > 32767 ) + blocklen = 32767; + stbiw__sbpush( out, data_len - j == blocklen ); // BFINAL = ?, BTYPE = 0 -- no compression + stbiw__sbpush( out, STBIW_UCHAR( blocklen ) ); // LEN + stbiw__sbpush( out, STBIW_UCHAR( blocklen >> 8 ) ); + stbiw__sbpush( out, STBIW_UCHAR( ~blocklen ) ); // NLEN + stbiw__sbpush( out, STBIW_UCHAR( ~blocklen >> 8 ) ); + memcpy( out + stbiw__sbn( out ), data + j, blocklen ); + stbiw__sbn( out ) += blocklen; + j += blocklen; + } + } + + { + // compute adler32 on input + unsigned int s1 = 1, s2 = 0; + int blocklen = (int) ( data_len % 5552 ); + j = 0; + while( j < data_len ) + { + for( i = 0; i < blocklen; ++i ) + { + s1 += data[j + i]; + s2 += s1; + } + s1 %= 65521; + s2 %= 65521; + j += blocklen; + blocklen = 5552; + } + stbiw__sbpush( out, STBIW_UCHAR( s2 >> 8 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s2 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s1 >> 8 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s1 ) ); + } + *out_len = stbiw__sbn( out ); + // make returned pointer freeable + STBIW_MEMMOVE( stbiw__sbraw( out ), out, *out_len ); + return (unsigned char*) stbiw__sbraw( out ); +#endif // STBIW_ZLIB_COMPRESS +} + +static unsigned int stbiw__crc32( unsigned char* buffer, int len ) +{ +#ifdef STBIW_CRC32 + return STBIW_CRC32( buffer, len ); +#else + static unsigned int crc_table[256] = { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0eDB8832, + 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, + 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, + 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, + 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, + 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, + 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, + 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, + 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, + 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, + 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, + 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, + 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, + 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, + 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, + 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, + 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, + 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, + 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, + 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, + 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, + 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, + 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, + 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, + 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, + 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; + + unsigned int crc = ~0u; + int i; + for( i = 0; i < len; ++i ) + crc = ( crc >> 8 ) ^ crc_table[buffer[i] ^ ( crc & 0xff )]; + return ~crc; +#endif +} + +#define stbiw__wpng4( o, a, b, c, d ) \ + ( ( o )[0] = STBIW_UCHAR( a ), \ + ( o )[1] = STBIW_UCHAR( b ), \ + ( o )[2] = STBIW_UCHAR( c ), \ + ( o )[3] = STBIW_UCHAR( d ), \ + ( o ) += 4 ) +#define stbiw__wp32( data, v ) stbiw__wpng4( data, ( v ) >> 24, ( v ) >> 16, ( v ) >> 8, ( v ) ); +#define stbiw__wptag( data, s ) stbiw__wpng4( data, s[0], s[1], s[2], s[3] ) + +static void stbiw__wpcrc( unsigned char** data, int len ) +{ + unsigned int crc = stbiw__crc32( *data - len - 4, len + 4 ); + stbiw__wp32( *data, crc ); +} + +static unsigned char stbiw__paeth( int a, int b, int c ) +{ + int p = a + b - c, pa = abs( p - a ), pb = abs( p - b ), pc = abs( p - c ); + if( pa <= pb && pa <= pc ) + return STBIW_UCHAR( a ); + if( pb <= pc ) + return STBIW_UCHAR( b ); + return STBIW_UCHAR( c ); +} + +// @OPTIMIZE: provide an option that always forces left-predict or paeth predict +static void stbiw__encode_png_line( unsigned char* pixels, + int stride_bytes, + int width, + int height, + int y, + int n, + int filter_type, + signed char* line_buffer ) +{ + static int mapping[] = { 0, 1, 2, 3, 4 }; + static int firstmap[] = { 0, 1, 0, 5, 6 }; + int* mymap = ( y != 0 ) ? mapping : firstmap; + int i; + int type = mymap[filter_type]; + unsigned char* z = pixels + stride_bytes * ( stbi__flip_vertically_on_write ? height - 1 - y : y ); + int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; + + if( type == 0 ) + { + memcpy( line_buffer, z, width * n ); + return; + } + + // first loop isn't optimized since it's just one pixel + for( i = 0; i < n; ++i ) + { + switch( type ) + { + case 1: + line_buffer[i] = z[i]; + break; + case 2: + line_buffer[i] = z[i] - z[i - signed_stride]; + break; + case 3: + line_buffer[i] = z[i] - ( z[i - signed_stride] >> 1 ); + break; + case 4: + line_buffer[i] = (signed char) ( z[i] - stbiw__paeth( 0, z[i - signed_stride], 0 ) ); + break; + case 5: + line_buffer[i] = z[i]; + break; + case 6: + line_buffer[i] = z[i]; + break; + } + } + switch( type ) + { + case 1: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - z[i - n]; + break; + case 2: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - z[i - signed_stride]; + break; + case 3: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - ( ( z[i - n] + z[i - signed_stride] ) >> 1 ); + break; + case 4: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - stbiw__paeth( z[i - n], z[i - signed_stride], z[i - signed_stride - n] ); + break; + case 5: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - ( z[i - n] >> 1 ); + break; + case 6: + for( i = n; i < width * n; ++i ) + line_buffer[i] = z[i] - stbiw__paeth( z[i - n], 0, 0 ); + break; + } +} + +STBIWDEF unsigned char* +stbi_write_png_to_mem( const unsigned char* pixels, int stride_bytes, int x, int y, int n, int* out_len ) +{ + int force_filter = stbi_write_force_png_filter; + int ctype[5] = { -1, 0, 4, 2, 6 }; + unsigned char sig[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; + unsigned char *out, *o, *filt, *zlib; + signed char* line_buffer; + int j, zlen; + + if( stride_bytes == 0 ) + stride_bytes = x * n; + + if( force_filter >= 5 ) + { + force_filter = -1; + } + + filt = (unsigned char*) STBIW_MALLOC( ( x * n + 1 ) * y ); + if( !filt ) + return 0; + line_buffer = (signed char*) STBIW_MALLOC( x * n ); + if( !line_buffer ) + { + STBIW_FREE( filt ); + return 0; + } + for( j = 0; j < y; ++j ) + { + int filter_type; + if( force_filter > -1 ) + { + filter_type = force_filter; + stbiw__encode_png_line( (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, force_filter, line_buffer ); + } + else + { // Estimate the best filter by running through all of them: + int best_filter = 0, best_filter_val = 0x7fffffff, est, i; + for( filter_type = 0; filter_type < 5; filter_type++ ) + { + stbiw__encode_png_line( + (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, filter_type, line_buffer ); + + // Estimate the entropy of the line using this filter; the less, the better. + est = 0; + for( i = 0; i < x * n; ++i ) + { + est += abs( (signed char) line_buffer[i] ); + } + if( est < best_filter_val ) + { + best_filter_val = est; + best_filter = filter_type; + } + } + if( filter_type != best_filter ) + { // If the last iteration already got us the best filter, don't redo it + stbiw__encode_png_line( + (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, best_filter, line_buffer ); + filter_type = best_filter; + } + } + // when we get here, filter_type contains the filter type, and line_buffer contains the data + filt[j * ( x * n + 1 )] = (unsigned char) filter_type; + STBIW_MEMMOVE( filt + j * ( x * n + 1 ) + 1, line_buffer, x * n ); + } + STBIW_FREE( line_buffer ); + zlib = stbi_zlib_compress( filt, y * ( x * n + 1 ), &zlen, stbi_write_png_compression_level ); + STBIW_FREE( filt ); + if( !zlib ) + return 0; + + // each tag requires 12 bytes of overhead + out = (unsigned char*) STBIW_MALLOC( 8 + 12 + 13 + 12 + zlen + 12 ); + if( !out ) + return 0; + *out_len = 8 + 12 + 13 + 12 + zlen + 12; + + o = out; + STBIW_MEMMOVE( o, sig, 8 ); + o += 8; + stbiw__wp32( o, 13 ); // header length + stbiw__wptag( o, "IHDR" ); + stbiw__wp32( o, x ); + stbiw__wp32( o, y ); + *o++ = 8; + *o++ = STBIW_UCHAR( ctype[n] ); + *o++ = 0; + *o++ = 0; + *o++ = 0; + stbiw__wpcrc( &o, 13 ); + + stbiw__wp32( o, zlen ); + stbiw__wptag( o, "IDAT" ); + STBIW_MEMMOVE( o, zlib, zlen ); + o += zlen; + STBIW_FREE( zlib ); + stbiw__wpcrc( &o, zlen ); + + stbiw__wp32( o, 0 ); + stbiw__wptag( o, "IEND" ); + stbiw__wpcrc( &o, 0 ); + + STBIW_ASSERT( o == out + *out_len ); + + return out; +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png( char const* filename, int x, int y, int comp, const void* data, int stride_bytes ) +{ + FILE* f; + int len; + unsigned char* png = stbi_write_png_to_mem( (const unsigned char*) data, stride_bytes, x, y, comp, &len ); + if( png == NULL ) + return 0; + + f = stbiw__fopen( filename, "wb" ); + if( !f ) + { + STBIW_FREE( png ); + return 0; + } + fwrite( png, 1, len, f ); + fclose( f ); + STBIW_FREE( png ); + return 1; +} +#endif + +STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, + void* context, + int x, + int y, + int comp, + const void* data, + int stride_bytes ) +{ + int len; + unsigned char* png = stbi_write_png_to_mem( (const unsigned char*) data, stride_bytes, x, y, comp, &len ); + if( png == NULL ) + return 0; + func( context, png, len ); + STBIW_FREE( png ); + return 1; +} + +/* *************************************************************************** + * + * JPEG writer + * + * This is based on Jon Olick's jo_jpeg.cpp: + * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html + */ + +static const unsigned char stbiw__jpg_ZigZag[] = { 0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, + 3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53, + 10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60, + 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 }; + +static void stbiw__jpg_writeBits( stbi__write_context* s, int* bitBufP, int* bitCntP, const unsigned short* bs ) +{ + int bitBuf = *bitBufP, bitCnt = *bitCntP; + bitCnt += bs[1]; + bitBuf |= bs[0] << ( 24 - bitCnt ); + while( bitCnt >= 8 ) + { + unsigned char c = ( bitBuf >> 16 ) & 255; + stbiw__putc( s, c ); + if( c == 255 ) + { + stbiw__putc( s, 0 ); + } + bitBuf <<= 8; + bitCnt -= 8; + } + *bitBufP = bitBuf; + *bitCntP = bitCnt; +} + +static void +stbiw__jpg_DCT( float* d0p, float* d1p, float* d2p, float* d3p, float* d4p, float* d5p, float* d6p, float* d7p ) +{ + float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; + float z1, z2, z3, z4, z5, z11, z13; + + float tmp0 = d0 + d7; + float tmp7 = d0 - d7; + float tmp1 = d1 + d6; + float tmp6 = d1 - d6; + float tmp2 = d2 + d5; + float tmp5 = d2 - d5; + float tmp3 = d3 + d4; + float tmp4 = d3 - d4; + + // Even part + float tmp10 = tmp0 + tmp3; // phase 2 + float tmp13 = tmp0 - tmp3; + float tmp11 = tmp1 + tmp2; + float tmp12 = tmp1 - tmp2; + + d0 = tmp10 + tmp11; // phase 3 + d4 = tmp10 - tmp11; + + z1 = ( tmp12 + tmp13 ) * 0.707106781f; // c4 + d2 = tmp13 + z1; // phase 5 + d6 = tmp13 - z1; + + // Odd part + tmp10 = tmp4 + tmp5; // phase 2 + tmp11 = tmp5 + tmp6; + tmp12 = tmp6 + tmp7; + + // The rotator is modified from fig 4-8 to avoid extra negations. + z5 = ( tmp10 - tmp12 ) * 0.382683433f; // c6 + z2 = tmp10 * 0.541196100f + z5; // c2-c6 + z4 = tmp12 * 1.306562965f + z5; // c2+c6 + z3 = tmp11 * 0.707106781f; // c4 + + z11 = tmp7 + z3; // phase 5 + z13 = tmp7 - z3; + + *d5p = z13 + z2; // phase 6 + *d3p = z13 - z2; + *d1p = z11 + z4; + *d7p = z11 - z4; + + *d0p = d0; + *d2p = d2; + *d4p = d4; + *d6p = d6; +} + +static void stbiw__jpg_calcBits( int val, unsigned short bits[2] ) +{ + int tmp1 = val < 0 ? -val : val; + val = val < 0 ? val - 1 : val; + bits[1] = 1; + while( tmp1 >>= 1 ) + { + ++bits[1]; + } + bits[0] = val & ( ( 1 << bits[1] ) - 1 ); +} + +static int stbiw__jpg_processDU( stbi__write_context* s, + int* bitBuf, + int* bitCnt, + float* CDU, + int du_stride, + float* fdtbl, + int DC, + const unsigned short HTDC[256][2], + const unsigned short HTAC[256][2] ) +{ + const unsigned short EOB[2] = { HTAC[0x00][0], HTAC[0x00][1] }; + const unsigned short M16zeroes[2] = { HTAC[0xF0][0], HTAC[0xF0][1] }; + int dataOff, i, j, n, diff, end0pos, x, y; + int DU[64]; + + // DCT rows + for( dataOff = 0, n = du_stride * 8; dataOff < n; dataOff += du_stride ) + { + stbiw__jpg_DCT( &CDU[dataOff], + &CDU[dataOff + 1], + &CDU[dataOff + 2], + &CDU[dataOff + 3], + &CDU[dataOff + 4], + &CDU[dataOff + 5], + &CDU[dataOff + 6], + &CDU[dataOff + 7] ); + } + // DCT columns + for( dataOff = 0; dataOff < 8; ++dataOff ) + { + stbiw__jpg_DCT( &CDU[dataOff], + &CDU[dataOff + du_stride], + &CDU[dataOff + du_stride * 2], + &CDU[dataOff + du_stride * 3], + &CDU[dataOff + du_stride * 4], + &CDU[dataOff + du_stride * 5], + &CDU[dataOff + du_stride * 6], + &CDU[dataOff + du_stride * 7] ); + } + // Quantize/descale/zigzag the coefficients + for( y = 0, j = 0; y < 8; ++y ) + { + for( x = 0; x < 8; ++x, ++j ) + { + float v; + i = y * du_stride + x; + v = CDU[i] * fdtbl[j]; + // DU[stbiw__jpg_ZigZag[j]] = (int)(v < 0 ? ceilf(v - 0.5f) : floorf(v + 0.5f)); + // ceilf() and floorf() are C99, not C89, but I /think/ they're not needed here anyway? + DU[stbiw__jpg_ZigZag[j]] = (int) ( v < 0 ? v - 0.5f : v + 0.5f ); + } + } + + // Encode DC + diff = DU[0] - DC; + if( diff == 0 ) + { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[0] ); + } + else + { + unsigned short bits[2]; + stbiw__jpg_calcBits( diff, bits ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[bits[1]] ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); + } + // Encode ACs + end0pos = 63; + for( ; ( end0pos > 0 ) && ( DU[end0pos] == 0 ); --end0pos ) + { + } + // end0pos = first element in reverse order !=0 + if( end0pos == 0 ) + { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); + return DU[0]; + } + for( i = 1; i <= end0pos; ++i ) + { + int startpos = i; + int nrzeroes; + unsigned short bits[2]; + for( ; DU[i] == 0 && i <= end0pos; ++i ) + { + } + nrzeroes = i - startpos; + if( nrzeroes >= 16 ) + { + int lng = nrzeroes >> 4; + int nrmarker; + for( nrmarker = 1; nrmarker <= lng; ++nrmarker ) + stbiw__jpg_writeBits( s, bitBuf, bitCnt, M16zeroes ); + nrzeroes &= 15; + } + stbiw__jpg_calcBits( DU[i], bits ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTAC[( nrzeroes << 4 ) + bits[1]] ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); + } + if( end0pos != 63 ) + { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); + } + return DU[0]; +} + +static int stbi_write_jpg_core( stbi__write_context* s, int width, int height, int comp, const void* data, int quality ) +{ + // Constants that don't pollute global namespace + static const unsigned char std_dc_luminance_nrcodes[] = { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; + static const unsigned char std_dc_luminance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; + static const unsigned char std_ac_luminance_nrcodes[] = { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; + static const unsigned char std_ac_luminance_values[] = { + 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, + 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, + 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, + 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, + 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, + 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, + 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, + 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, + 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; + static const unsigned char std_dc_chrominance_nrcodes[] = { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; + static const unsigned char std_dc_chrominance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; + static const unsigned char std_ac_chrominance_nrcodes[] = { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; + static const unsigned char std_ac_chrominance_values[] = { + 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, + 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, + 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, + 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, + 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, + 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, + 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, + 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; + // Huffman tables + static const unsigned short YDC_HT[256][2] = { { 0, 2 }, + { 2, 3 }, + { 3, 3 }, + { 4, 3 }, + { 5, 3 }, + { 6, 3 }, + { 14, 4 }, + { 30, 5 }, + { 62, 6 }, + { 126, 7 }, + { 254, 8 }, + { 510, 9 } }; + static const unsigned short UVDC_HT[256][2] = { { 0, 2 }, + { 1, 2 }, + { 2, 2 }, + { 6, 3 }, + { 14, 4 }, + { 30, 5 }, + { 62, 6 }, + { 126, 7 }, + { 254, 8 }, + { 510, 9 }, + { 1022, 10 }, + { 2046, 11 } }; + static const unsigned short YAC_HT[256][2] = { + { 10, 4 }, { 0, 2 }, { 1, 2 }, { 4, 3 }, { 11, 4 }, { 26, 5 }, { 120, 7 }, + { 248, 8 }, { 1014, 10 }, { 65410, 16 }, { 65411, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 12, 4 }, { 27, 5 }, { 121, 7 }, { 502, 9 }, + { 2038, 11 }, { 65412, 16 }, { 65413, 16 }, { 65414, 16 }, { 65415, 16 }, { 65416, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 28, 5 }, { 249, 8 }, + { 1015, 10 }, { 4084, 12 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 65420, 16 }, { 65421, 16 }, + { 65422, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 58, 6 }, { 503, 9 }, { 4085, 12 }, { 65423, 16 }, { 65424, 16 }, { 65425, 16 }, { 65426, 16 }, + { 65427, 16 }, { 65428, 16 }, { 65429, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 59, 6 }, { 1016, 10 }, { 65430, 16 }, { 65431, 16 }, { 65432, 16 }, + { 65433, 16 }, { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 122, 7 }, { 2039, 11 }, { 65438, 16 }, + { 65439, 16 }, { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 123, 7 }, + { 4086, 12 }, { 65446, 16 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, + { 65452, 16 }, { 65453, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 250, 8 }, { 4087, 12 }, { 65454, 16 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, + { 65458, 16 }, { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 504, 9 }, { 32704, 15 }, { 65462, 16 }, { 65463, 16 }, + { 65464, 16 }, { 65465, 16 }, { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 505, 9 }, { 65470, 16 }, + { 65471, 16 }, { 65472, 16 }, { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, + { 65478, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 506, 9 }, { 65479, 16 }, { 65480, 16 }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, + { 65485, 16 }, { 65486, 16 }, { 65487, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 1017, 10 }, { 65488, 16 }, { 65489, 16 }, { 65490, 16 }, { 65491, 16 }, + { 65492, 16 }, { 65493, 16 }, { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 1018, 10 }, { 65497, 16 }, { 65498, 16 }, + { 65499, 16 }, { 65500, 16 }, { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 2040, 11 }, + { 65506, 16 }, { 65507, 16 }, { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, + { 65513, 16 }, { 65514, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 65515, 16 }, { 65516, 16 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, + { 65521, 16 }, { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 2041, 11 }, { 65525, 16 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, + { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; + static const unsigned short UVAC_HT[256][2] = { + { 0, 2 }, { 1, 2 }, { 4, 3 }, { 10, 4 }, { 24, 5 }, { 25, 5 }, { 56, 6 }, + { 120, 7 }, { 500, 9 }, { 1014, 10 }, { 4084, 12 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 11, 4 }, { 57, 6 }, { 246, 8 }, { 501, 9 }, + { 2038, 11 }, { 4085, 12 }, { 65416, 16 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 26, 5 }, { 247, 8 }, + { 1015, 10 }, { 4086, 12 }, { 32706, 15 }, { 65420, 16 }, { 65421, 16 }, { 65422, 16 }, { 65423, 16 }, + { 65424, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 27, 5 }, { 248, 8 }, { 1016, 10 }, { 4087, 12 }, { 65425, 16 }, { 65426, 16 }, { 65427, 16 }, + { 65428, 16 }, { 65429, 16 }, { 65430, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 58, 6 }, { 502, 9 }, { 65431, 16 }, { 65432, 16 }, { 65433, 16 }, + { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 65438, 16 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 59, 6 }, { 1017, 10 }, { 65439, 16 }, + { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, { 65446, 16 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 121, 7 }, + { 2039, 11 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, { 65452, 16 }, + { 65453, 16 }, { 65454, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 122, 7 }, { 2040, 11 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, { 65458, 16 }, + { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 65462, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 249, 8 }, { 65463, 16 }, { 65464, 16 }, { 65465, 16 }, + { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 65470, 16 }, { 65471, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 503, 9 }, { 65472, 16 }, + { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, { 65478, 16 }, { 65479, 16 }, + { 65480, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 504, 9 }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, { 65485, 16 }, { 65486, 16 }, + { 65487, 16 }, { 65488, 16 }, { 65489, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 505, 9 }, { 65490, 16 }, { 65491, 16 }, { 65492, 16 }, { 65493, 16 }, + { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 65497, 16 }, { 65498, 16 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 506, 9 }, { 65499, 16 }, { 65500, 16 }, + { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, { 65506, 16 }, { 65507, 16 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 2041, 11 }, + { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, { 65513, 16 }, { 65514, 16 }, + { 65515, 16 }, { 65516, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 16352, 14 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, { 65521, 16 }, + { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 65525, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 1018, 10 }, { 32707, 15 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, + { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; + static const int YQT[] = { 16, 11, 10, 16, 24, 40, 51, 61, 12, 12, 14, 19, 26, 58, 60, 55, + 14, 13, 16, 24, 40, 57, 69, 56, 14, 17, 22, 29, 51, 87, 80, 62, + 18, 22, 37, 56, 68, 109, 103, 77, 24, 35, 55, 64, 81, 104, 113, 92, + 49, 64, 78, 87, 103, 121, 120, 101, 72, 92, 95, 98, 112, 100, 103, 99 }; + static const int UVQT[] = { 17, 18, 24, 47, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, + 99, 99, 47, 66, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, + 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 }; + static const float aasf[] = { 1.0f * 2.828427125f, + 1.387039845f * 2.828427125f, + 1.306562965f * 2.828427125f, + 1.175875602f * 2.828427125f, + 1.0f * 2.828427125f, + 0.785694958f * 2.828427125f, + 0.541196100f * 2.828427125f, + 0.275899379f * 2.828427125f }; + + int row, col, i, k, subsample; + float fdtbl_Y[64], fdtbl_UV[64]; + unsigned char YTable[64], UVTable[64]; + + if( !data || !width || !height || comp > 4 || comp < 1 ) + { + return 0; + } + + quality = quality ? quality : 90; + subsample = quality <= 90 ? 1 : 0; + quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; + quality = quality < 50 ? 5000 / quality : 200 - quality * 2; + + for( i = 0; i < 64; ++i ) + { + int uvti, yti = ( YQT[i] * quality + 50 ) / 100; + YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) ( yti < 1 ? 1 : yti > 255 ? 255 : yti ); + uvti = ( UVQT[i] * quality + 50 ) / 100; + UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) ( uvti < 1 ? 1 : uvti > 255 ? 255 : uvti ); + } + + for( row = 0, k = 0; row < 8; ++row ) + { + for( col = 0; col < 8; ++col, ++k ) + { + fdtbl_Y[k] = 1 / ( YTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); + fdtbl_UV[k] = 1 / ( UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); + } + } + + // Write Headers + { + static const unsigned char head0[] = { 0xFF, 0xD8, 0xFF, 0xE0, 0, 0x10, 'J', 'F', 'I', 'F', 0, 1, 1, + 0, 0, 1, 0, 1, 0, 0, 0xFF, 0xDB, 0, 0x84, 0 }; + static const unsigned char head2[] = { 0xFF, 0xDA, 0, 0xC, 3, 1, 0, 2, 0x11, 3, 0x11, 0, 0x3F, 0 }; + const unsigned char head1[] = { 0xFF, + 0xC0, + 0, + 0x11, + 8, + (unsigned char) ( height >> 8 ), + STBIW_UCHAR( height ), + (unsigned char) ( width >> 8 ), + STBIW_UCHAR( width ), + 3, + 1, + (unsigned char) ( subsample ? 0x22 : 0x11 ), + 0, + 2, + 0x11, + 1, + 3, + 0x11, + 1, + 0xFF, + 0xC4, + 0x01, + 0xA2, + 0 }; + s->func( s->context, (void*) head0, sizeof( head0 ) ); + s->func( s->context, (void*) YTable, sizeof( YTable ) ); + stbiw__putc( s, 1 ); + s->func( s->context, UVTable, sizeof( UVTable ) ); + s->func( s->context, (void*) head1, sizeof( head1 ) ); + s->func( s->context, (void*) ( std_dc_luminance_nrcodes + 1 ), sizeof( std_dc_luminance_nrcodes ) - 1 ); + s->func( s->context, (void*) std_dc_luminance_values, sizeof( std_dc_luminance_values ) ); + stbiw__putc( s, 0x10 ); // HTYACinfo + s->func( s->context, (void*) ( std_ac_luminance_nrcodes + 1 ), sizeof( std_ac_luminance_nrcodes ) - 1 ); + s->func( s->context, (void*) std_ac_luminance_values, sizeof( std_ac_luminance_values ) ); + stbiw__putc( s, 1 ); // HTUDCinfo + s->func( s->context, (void*) ( std_dc_chrominance_nrcodes + 1 ), sizeof( std_dc_chrominance_nrcodes ) - 1 ); + s->func( s->context, (void*) std_dc_chrominance_values, sizeof( std_dc_chrominance_values ) ); + stbiw__putc( s, 0x11 ); // HTUACinfo + s->func( s->context, (void*) ( std_ac_chrominance_nrcodes + 1 ), sizeof( std_ac_chrominance_nrcodes ) - 1 ); + s->func( s->context, (void*) std_ac_chrominance_values, sizeof( std_ac_chrominance_values ) ); + s->func( s->context, (void*) head2, sizeof( head2 ) ); + } + + // Encode 8x8 macroblocks + { + static const unsigned short fillBits[] = { 0x7F, 7 }; + int DCY = 0, DCU = 0, DCV = 0; + int bitBuf = 0, bitCnt = 0; + // comp == 2 is grey+alpha (alpha is ignored) + int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; + const unsigned char* dataR = (const unsigned char*) data; + const unsigned char* dataG = dataR + ofsG; + const unsigned char* dataB = dataR + ofsB; + int x, y, pos; + if( subsample ) + { + for( y = 0; y < height; y += 16 ) + { + for( x = 0; x < width; x += 16 ) + { + float Y[256], U[256], V[256]; + for( row = y, pos = 0; row < y + 16; ++row ) + { + // row >= height => use last input row + int clamped_row = ( row < height ) ? row : height - 1; + int base_p = ( stbi__flip_vertically_on_write ? ( height - 1 - clamped_row ) : clamped_row ) + * width * comp; + for( col = x; col < x + 16; ++col, ++pos ) + { + // if col >= width => use pixel from last input column + int p = base_p + ( ( col < width ) ? col : ( width - 1 ) ) * comp; + float r = dataR[p], g = dataG[p], b = dataB[p]; + Y[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128; + U[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b; + V[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b; + } + } + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 0, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 8, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 128, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 136, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + + // subsample U,V + { + float subU[64], subV[64]; + int yy, xx; + for( yy = 0, pos = 0; yy < 8; ++yy ) + { + for( xx = 0; xx < 8; ++xx, ++pos ) + { + int j = yy * 32 + xx * 2; + subU[pos] = ( U[j + 0] + U[j + 1] + U[j + 16] + U[j + 17] ) * 0.25f; + subV[pos] = ( V[j + 0] + V[j + 1] + V[j + 16] + V[j + 17] ) * 0.25f; + } + } + DCU = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, subU, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT ); + DCV = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, subV, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT ); + } + } + } + } + else + { + for( y = 0; y < height; y += 8 ) + { + for( x = 0; x < width; x += 8 ) + { + float Y[64], U[64], V[64]; + for( row = y, pos = 0; row < y + 8; ++row ) + { + // row >= height => use last input row + int clamped_row = ( row < height ) ? row : height - 1; + int base_p = ( stbi__flip_vertically_on_write ? ( height - 1 - clamped_row ) : clamped_row ) + * width * comp; + for( col = x; col < x + 8; ++col, ++pos ) + { + // if col >= width => use pixel from last input column + int p = base_p + ( ( col < width ) ? col : ( width - 1 ) ) * comp; + float r = dataR[p], g = dataG[p], b = dataB[p]; + Y[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128; + U[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b; + V[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b; + } + } + + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y, 8, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + DCU = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, U, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT ); + DCV = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, V, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT ); + } + } + } + + // Do the bit alignment of the EOI marker + stbiw__jpg_writeBits( s, &bitBuf, &bitCnt, fillBits ); + } + + // EOI + stbiw__putc( s, 0xFF ); + stbiw__putc( s, 0xD9 ); + + return 1; +} + +STBIWDEF int +stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_jpg_core( &s, x, y, comp, (void*) data, quality ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ) +{ + stbi__write_context s = { 0 }; + if( stbi__start_write_file( &s, filename ) ) + { + int r = stbi_write_jpg_core( &s, x, y, comp, data, quality ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif + +#endif // STB_IMAGE_WRITE_IMPLEMENTATION + +/* Revision history + 1.16 (2021-07-11) + make Deflate code emit uncompressed blocks when it would otherwise expand + support writing BMPs with alpha channel + 1.15 (2020-07-13) unknown + 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels + 1.13 + 1.12 + 1.11 (2019-08-11) + + 1.10 (2019-02-07) + support utf8 filenames in Windows; fix warnings and platform ifdefs + 1.09 (2018-02-11) + fix typo in zlib quality API, improve STB_I_W_STATIC in C++ + 1.08 (2018-01-29) + add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter + 1.07 (2017-07-24) + doc fix + 1.06 (2017-07-23) + writing JPEG (using Jon Olick's code) + 1.05 ??? + 1.04 (2017-03-03) + monochrome BMP expansion + 1.03 ??? + 1.02 (2016-04-02) + avoid allocating large structures on the stack + 1.01 (2016-01-16) + STBIW_REALLOC_SIZED: support allocators with no realloc support + avoid race-condition in crc initialization + minor compile issues + 1.00 (2015-09-14) + installable file IO function + 0.99 (2015-09-13) + warning fixes; TGA rle support + 0.98 (2015-04-08) + added STBIW_MALLOC, STBIW_ASSERT etc + 0.97 (2015-01-18) + fixed HDR asserts, rewrote HDR rle logic + 0.96 (2015-01-17) + add HDR output + fix monochrome BMP + 0.95 (2014-08-17) + add monochrome TGA output + 0.94 (2014-05-31) + rename private functions to avoid conflicts with stb_image.h + 0.93 (2014-05-27) + warning fixes + 0.92 (2010-08-01) + casts to unsigned char to fix warnings + 0.91 (2010-07-17) + first public release + 0.90 first internal release +*/ + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ From 8bc040548814c3cda3b7b9bdd64802ac3744e263 Mon Sep 17 00:00:00 2001 From: Fabian Druschke Date: Wed, 9 Oct 2024 21:58:01 +0200 Subject: [PATCH 3/3] Added src/stb_image_write.h external dependency using git submodule. --- .gitmodules | 3 + configure.ac | 157 ++- external/stb | 1 + src/Makefile.am | 2 +- src/create_pdf.c | 4 +- src/stb_image_write.h | 2228 ----------------------------------------- 6 files changed, 76 insertions(+), 2319 deletions(-) create mode 100644 .gitmodules create mode 160000 external/stb delete mode 100644 src/stb_image_write.h diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 00000000..ad1bdcfc --- /dev/null +++ b/.gitmodules @@ -0,0 +1,3 @@ +[submodule "external/stb"] + path = external/stb + url = https://github.com/nothings/stb.git diff --git a/configure.ac b/configure.ac index 132e109d..b643c701 100644 --- a/configure.ac +++ b/configure.ac @@ -2,10 +2,8 @@ # Process this file with autoconf to produce a configure script. AC_PREREQ([2.63]) -AC_INIT([nwipe],[0.37],[git@brumit.nl]) -AM_INIT_AUTOMAKE(foreign subdir-objects) -AC_CONFIG_FILES([Makefile src/Makefile man/Makefile]) -AC_OUTPUT +AC_INIT([nwipe], [0.37], [git@brumit.nl]) +AM_INIT_AUTOMAKE([foreign subdir-objects]) AC_CONFIG_SRCDIR([src/nwipe.c]) AC_CONFIG_HEADERS([config.h]) @@ -15,96 +13,66 @@ PKG_PROG_PKG_CONFIG # Checks for libraries. -PKG_CHECK_MODULES( - [PANEL], - [panel], - [ - CFLAGS="${CFLAGS} ${PANEL_CFLAGS}" - LIBS="${LIBS} ${PANEL_LIBS}" - ], - [AC_CHECK_LIB([panel], [main], [ - LIBS="-lpanel $LIBS" - AC_CHECK_HEADERS(panel.h,, [ - AC_CHECK_HEADERS(ncurses/panel.h, [ - AC_DEFINE([PANEL_IN_SUBDIR], [ncurses/], [Look for ncurses headers in subdir]) - ], [AC_MSG_ERROR([ncurses panel headers not found])]) - ]) - ], [AC_MSG_ERROR([ncurses panel library not found])])] -) +PKG_CHECK_MODULES([PANEL], [panel], + [CFLAGS="${CFLAGS} ${PANEL_CFLAGS}" + LIBS="${LIBS} ${PANEL_LIBS}"], + [AC_CHECK_LIB([panel], [main], + [LIBS="-lpanel $LIBS" + AC_CHECK_HEADERS([panel.h], + [], + [AC_CHECK_HEADERS([ncurses/panel.h], + [AC_DEFINE([PANEL_IN_SUBDIR], ["ncurses/"], [Look for ncurses headers in subdir])], + [AC_MSG_ERROR([ncurses panel headers not found])])])], + [AC_MSG_ERROR([ncurses panel library not found])])]) -PKG_CHECK_MODULES( - [NCURSES], - [ncurses], - [ - CFLAGS="${CFLAGS} ${NCURSES_CFLAGS}" - LIBS="${LIBS} ${NCURSES_LIBS}" - ], - [AC_CHECK_LIB([ncurses], [delscreen], [ - LIBS="-lncurses $LIBS" - AC_CHECK_HEADERS(ncurses.h,, [ - AC_CHECK_HEADERS(ncurses/ncurses.h, [ - AC_DEFINE([NCURSES_IN_SUBDIR], [ncurses/], [Look for ncurses headers in subdir]) - ], [AC_MSG_ERROR([ncurses headers not found])]) - ]) - ], [AC_MSG_ERROR([ncurses development library not found])] - )] -) +PKG_CHECK_MODULES([NCURSES], [ncurses], + [CFLAGS="${CFLAGS} ${NCURSES_CFLAGS}" + LIBS="${LIBS} ${NCURSES_LIBS}"], + [AC_CHECK_LIB([ncurses], [delscreen], + [LIBS="-lncurses $LIBS" + AC_CHECK_HEADERS([ncurses.h], + [], + [AC_CHECK_HEADERS([ncurses/ncurses.h], + [AC_DEFINE([NCURSES_IN_SUBDIR], ["ncurses/"], [Look for ncurses headers in subdir])], + [AC_MSG_ERROR([ncurses headers not found])])])], + [AC_MSG_ERROR([ncurses development library not found])])]) -PKG_CHECK_MODULES( - [OPENSSL], - [openssl], - [ - CFLAGS="${CFLAGS} ${OPENSSL_CFLAGS}" - LIBS="${LIBS} ${OPENSSL_LIBS}" - ], - [AC_CHECK_LIB([ssl], [SSL_library_init], [ - LIBS="-lssl -lcrypto $LIBS" - AC_CHECK_HEADERS(openssl/ssl.h,, [ - AC_CHECK_HEADERS(openssl/crypto.h, [ - AC_DEFINE([OPENSSL_IN_SUBDIR], [openssl/], [Look for openssl headers in subdir]) - ], [AC_MSG_ERROR([openssl headers not found])]) - ]) - ], [AC_MSG_ERROR([OpenSSL development library not found])] - )] -) +PKG_CHECK_MODULES([OPENSSL], [openssl], + [CFLAGS="${CFLAGS} ${OPENSSL_CFLAGS}" + LIBS="${LIBS} ${OPENSSL_LIBS}"], + [AC_CHECK_LIB([ssl], [SSL_library_init], + [LIBS="-lssl -lcrypto $LIBS" + AC_CHECK_HEADERS([openssl/ssl.h], + [], + [AC_CHECK_HEADERS([openssl/crypto.h], + [AC_DEFINE([OPENSSL_IN_SUBDIR], ["openssl/"], [Look for openssl headers in subdir])], + [AC_MSG_ERROR([openssl headers not found])])])], + [AC_MSG_ERROR([OpenSSL development library not found])])]) -PKG_CHECK_MODULES( - [LIBCONFIG], - [libconfig], - [ - CFLAGS="${CFLAGS} ${LIBCONFIG_CFLAGS}" - LIBS="${LIBS} ${LIBCONFIG_LIBS}" - ], - [AC_CHECK_LIB([libconfig], [main], [ - LIBS="-llibconfig $LIBS" - AC_CHECK_HEADERS(libconfig.h,, [ - AC_CHECK_HEADERS(libconfig.h, [ - AC_DEFINE([LIBCONFIG_IN_SUBDIR], [libconfig/], [Look for libconfig headers in subdir]) - ], [AC_MSG_ERROR([libconfig headers not found])]) - ]) - ], [AC_MSG_ERROR([libconfig library not found])])] -) +PKG_CHECK_MODULES([LIBCONFIG], [libconfig], + [CFLAGS="${CFLAGS} ${LIBCONFIG_CFLAGS}" + LIBS="${LIBS} ${LIBCONFIG_LIBS}"], + [AC_CHECK_LIB([config], [main], + [LIBS="-lconfig $LIBS" + AC_CHECK_HEADERS([libconfig.h], + [], + [AC_MSG_ERROR([libconfig headers not found])])], + [AC_MSG_ERROR([libconfig library not found])])]) -PKG_CHECK_MODULES( - [QRENCODE], - [qrencode], - [ - CFLAGS="${CFLAGS} ${QRENCODE_CFLAGS}" - LIBS="${LIBS} ${QRENCODE_LIBS}" - ], - [AC_CHECK_LIB([qrencode], [QRcode_encodeString], [ - LIBS="-lqrencode $LIBS" - AC_CHECK_HEADERS(qrencode.h,, [ - AC_MSG_ERROR([QRencode headers not found]) - ]) - ], [AC_MSG_ERROR([QRencode library not found])] - )] -) +PKG_CHECK_MODULES([QRENCODE], [qrencode], + [CFLAGS="${CFLAGS} ${QRENCODE_CFLAGS}" + LIBS="${LIBS} ${QRENCODE_LIBS}"], + [AC_CHECK_LIB([qrencode], [QRcode_encodeString], + [LIBS="-lqrencode $LIBS" + AC_CHECK_HEADERS([qrencode.h], + [], + [AC_MSG_ERROR([QRencode headers not found])])], + [AC_MSG_ERROR([QRencode library not found])])]) -AC_CHECK_LIB([intl], [libintl_dgettext]) # needed to statically link libparted, but not given in its pkgconfig file -AC_CHECK_LIB([uuid], [uuid_generate]) # needed to statically link libparted, but not given in its pkgconfig file -PKG_CHECK_MODULES([PARTED], [libparted]) -AC_CHECK_LIB([pthread], [main], ,[AC_MSG_ERROR([pthread development library not found])]) +AC_CHECK_LIB([intl], [libintl_dgettext], [], []) +AC_CHECK_LIB([uuid], [uuid_generate], [], []) +PKG_CHECK_MODULES([PARTED], [libparted], [], [AC_MSG_ERROR([libparted not found])]) +AC_CHECK_LIB([pthread], [main], [], [AC_MSG_ERROR([pthread development library not found])]) # Checks for header files. AC_CHECK_HEADERS([libconfig.h fcntl.h inttypes.h netinet/in.h stddef.h stdint.h stdlib.h string.h sys/file.h sys/ioctl.h unistd.h]) @@ -117,5 +85,16 @@ AC_CHECK_MEMBERS([struct stat.st_blksize]) AC_FUNC_MALLOC AC_CHECK_FUNCS([fdatasync memset regcomp strdup strerror]) +# Initialize and update git submodules if necessary. +AC_MSG_CHECKING([whether git submodules need to be initialized]) +AS_IF([test -d ".git" && test -f ".gitmodules"], + [git submodule status 2>/dev/null | grep -q "^[-+]" && ( + AC_MSG_RESULT([yes]) + AC_MSG_NOTICE([Initializing and updating git submodules...]) + git submodule init && git submodule update || AC_MSG_ERROR([Failed to initialize or update git submodules]) + ) || AC_MSG_RESULT([no])], + [AC_MSG_NOTICE([No git repository or submodules found. Skipping submodule initialization.])]) + +AC_CONFIG_FILES([Makefile src/Makefile man/Makefile]) AC_OUTPUT diff --git a/external/stb b/external/stb new file mode 160000 index 00000000..31707d14 --- /dev/null +++ b/external/stb @@ -0,0 +1 @@ +Subproject commit 31707d14fdb75da66b3eed52a2236a70af0d0960 diff --git a/src/Makefile.am b/src/Makefile.am index ac652c91..e2c0a57a 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1,6 +1,6 @@ # what flags you want to pass to the C compiler & linker #CFLAGS = -lncurses -lparted -AM_CFLAGS = +AM_CFLAGS = -I$(srcdir)/external/stb AM_LDFLAGS = # this lists the binaries to produce, the (non-PHONY, binary) targets in diff --git a/src/create_pdf.c b/src/create_pdf.c index 9c63a4c8..03273fde 100644 --- a/src/create_pdf.c +++ b/src/create_pdf.c @@ -52,8 +52,10 @@ #include #include #include + +/* Misc Headers */ #define STB_IMAGE_WRITE_IMPLEMENTATION -#include "stb_image_write.h" +#include "../external/stb/stb_image_write.h" #define text_size_data 10 diff --git a/src/stb_image_write.h b/src/stb_image_write.h deleted file mode 100644 index 650ecf74..00000000 --- a/src/stb_image_write.h +++ /dev/null @@ -1,2228 +0,0 @@ -/* stb_image_write - v1.16 - public domain - http://nothings.org/stb - writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 - no warranty implied; use at your own risk - - Before #including, - - #define STB_IMAGE_WRITE_IMPLEMENTATION - - in the file that you want to have the implementation. - - Will probably not work correctly with strict-aliasing optimizations. - -ABOUT: - - This header file is a library for writing images to C stdio or a callback. - - The PNG output is not optimal; it is 20-50% larger than the file - written by a decent optimizing implementation; though providing a custom - zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. - This library is designed for source code compactness and simplicity, - not optimal image file size or run-time performance. - -BUILDING: - - You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. - You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace - malloc,realloc,free. - You can #define STBIW_MEMMOVE() to replace memmove() - You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function - for PNG compression (instead of the builtin one), it must have the following signature: - unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); - The returned data will be freed with STBIW_FREE() (free() by default), - so it must be heap allocated with STBIW_MALLOC() (malloc() by default), - -UNICODE: - - If compiling for Windows and you wish to use Unicode filenames, compile - with - #define STBIW_WINDOWS_UTF8 - and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert - Windows wchar_t filenames to utf8. - -USAGE: - - There are five functions, one for each image file format: - - int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); - int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); - int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); - int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); - int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); - - void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically - - There are also five equivalent functions that use an arbitrary write function. You are - expected to open/close your file-equivalent before and after calling these: - - int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int -stride_in_bytes); int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void -*data); int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); int -stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); int -stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); - - where the callback is: - void stbi_write_func(void *context, void *data, int size); - - You can configure it with these global variables: - int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE - int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression - int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode - - - You can define STBI_WRITE_NO_STDIO to disable the file variant of these - functions, so the library will not use stdio.h at all. However, this will - also disable HDR writing, because it requires stdio for formatted output. - - Each function returns 0 on failure and non-0 on success. - - The functions create an image file defined by the parameters. The image - is a rectangle of pixels stored from left-to-right, top-to-bottom. - Each pixel contains 'comp' channels of data stored interleaved with 8-bits - per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is - monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. - The *data pointer points to the first byte of the top-left-most pixel. - For PNG, "stride_in_bytes" is the distance in bytes from the first byte of - a row of pixels to the first byte of the next row of pixels. - - PNG creates output files with the same number of components as the input. - The BMP format expands Y to RGB in the file format and does not - output alpha. - - PNG supports writing rectangles of data even when the bytes storing rows of - data are not consecutive in memory (e.g. sub-rectangles of a larger image), - by supplying the stride between the beginning of adjacent rows. The other - formats do not. (Thus you cannot write a native-format BMP through the BMP - writer, both because it is in BGR order and because it may have padding - at the end of the line.) - - PNG allows you to set the deflate compression level by setting the global - variable 'stbi_write_png_compression_level' (it defaults to 8). - - HDR expects linear float data. Since the format is always 32-bit rgb(e) - data, alpha (if provided) is discarded, and for monochrome data it is - replicated across all three channels. - - TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed - data, set the global variable 'stbi_write_tga_with_rle' to 0. - - JPEG does ignore alpha channels in input data; quality is between 1 and 100. - Higher quality looks better but results in a bigger image. - JPEG baseline (no JPEG progressive). - -CREDITS: - - - Sean Barrett - PNG/BMP/TGA - Baldur Karlsson - HDR - Jean-Sebastien Guay - TGA monochrome - Tim Kelsey - misc enhancements - Alan Hickman - TGA RLE - Emmanuel Julien - initial file IO callback implementation - Jon Olick - original jo_jpeg.cpp code - Daniel Gibson - integrate JPEG, allow external zlib - Aarni Koskela - allow choosing PNG filter - - bugfixes: - github:Chribba - Guillaume Chereau - github:jry2 - github:romigrou - Sergio Gonzalez - Jonas Karlsson - Filip Wasil - Thatcher Ulrich - github:poppolopoppo - Patrick Boettcher - github:xeekworx - Cap Petschulat - Simon Rodriguez - Ivan Tikhonov - github:ignotion - Adam Schackart - Andrew Kensler - -LICENSE - - See end of file for license information. - -*/ - -#ifndef INCLUDE_STB_IMAGE_WRITE_H -#define INCLUDE_STB_IMAGE_WRITE_H - -#include - -// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' -#ifndef STBIWDEF -#ifdef STB_IMAGE_WRITE_STATIC -#define STBIWDEF static -#else -#ifdef __cplusplus -#define STBIWDEF extern "C" -#else -#define STBIWDEF extern -#endif -#endif -#endif - -#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations -STBIWDEF int stbi_write_tga_with_rle; -STBIWDEF int stbi_write_png_compression_level; -STBIWDEF int stbi_write_force_png_filter; -#endif - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_png( char const* filename, int w, int h, int comp, const void* data, int stride_in_bytes ); -STBIWDEF int stbi_write_bmp( char const* filename, int w, int h, int comp, const void* data ); -STBIWDEF int stbi_write_tga( char const* filename, int w, int h, int comp, const void* data ); -STBIWDEF int stbi_write_hdr( char const* filename, int w, int h, int comp, const float* data ); -STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ); - -#ifdef STBIW_WINDOWS_UTF8 -STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ); -#endif -#endif - -typedef void stbi_write_func( void* context, void* data, int size ); - -STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, - void* context, - int w, - int h, - int comp, - const void* data, - int stride_in_bytes ); -STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); -STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); -STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const float* data ); -STBIWDEF int -stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ); - -STBIWDEF void stbi_flip_vertically_on_write( int flip_boolean ); - -#endif // INCLUDE_STB_IMAGE_WRITE_H - -#ifdef STB_IMAGE_WRITE_IMPLEMENTATION - -#ifdef _WIN32 -#ifndef _CRT_SECURE_NO_WARNINGS -#define _CRT_SECURE_NO_WARNINGS -#endif -#ifndef _CRT_NONSTDC_NO_DEPRECATE -#define _CRT_NONSTDC_NO_DEPRECATE -#endif -#endif - -#ifndef STBI_WRITE_NO_STDIO -#include -#endif // STBI_WRITE_NO_STDIO - -#include -#include -#include -#include - -#if defined( STBIW_MALLOC ) && defined( STBIW_FREE ) && ( defined( STBIW_REALLOC ) || defined( STBIW_REALLOC_SIZED ) ) -// ok -#elif !defined( STBIW_MALLOC ) && !defined( STBIW_FREE ) && !defined( STBIW_REALLOC ) && !defined( STBIW_REALLOC_SIZED ) -// ok -#else -#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." -#endif - -#ifndef STBIW_MALLOC -#define STBIW_MALLOC( sz ) malloc( sz ) -#define STBIW_REALLOC( p, newsz ) realloc( p, newsz ) -#define STBIW_FREE( p ) free( p ) -#endif - -#ifndef STBIW_REALLOC_SIZED -#define STBIW_REALLOC_SIZED( p, oldsz, newsz ) STBIW_REALLOC( p, newsz ) -#endif - -#ifndef STBIW_MEMMOVE -#define STBIW_MEMMOVE( a, b, sz ) memmove( a, b, sz ) -#endif - -#ifndef STBIW_ASSERT -#include -#define STBIW_ASSERT( x ) assert( x ) -#endif - -#define STBIW_UCHAR( x ) (unsigned char) ( ( x ) & 0xff ) - -#ifdef STB_IMAGE_WRITE_STATIC -static int stbi_write_png_compression_level = 8; -static int stbi_write_tga_with_rle = 1; -static int stbi_write_force_png_filter = -1; -#else -int stbi_write_png_compression_level = 8; -int stbi_write_tga_with_rle = 1; -int stbi_write_force_png_filter = -1; -#endif - -static int stbi__flip_vertically_on_write = 0; - -STBIWDEF void stbi_flip_vertically_on_write( int flag ) -{ - stbi__flip_vertically_on_write = flag; -} - -typedef struct -{ - stbi_write_func* func; - void* context; - unsigned char buffer[64]; - int buf_used; -} stbi__write_context; - -// initialize a callback-based context -static void stbi__start_write_callbacks( stbi__write_context* s, stbi_write_func* c, void* context ) -{ - s->func = c; - s->context = context; -} - -#ifndef STBI_WRITE_NO_STDIO - -static void stbi__stdio_write( void* context, void* data, int size ) -{ - fwrite( data, 1, size, (FILE*) context ); -} - -#if defined( _WIN32 ) && defined( STBIW_WINDOWS_UTF8 ) -#ifdef __cplusplus -#define STBIW_EXTERN extern "C" -#else -#define STBIW_EXTERN extern -#endif -STBIW_EXTERN __declspec( dllimport ) int __stdcall MultiByteToWideChar( unsigned int cp, - unsigned long flags, - const char* str, - int cbmb, - wchar_t* widestr, - int cchwide ); -STBIW_EXTERN __declspec( dllimport ) int __stdcall WideCharToMultiByte( unsigned int cp, - unsigned long flags, - const wchar_t* widestr, - int cchwide, - char* str, - int cbmb, - const char* defchar, - int* used_default ); - -STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ) -{ - return WideCharToMultiByte( 65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL ); -} -#endif - -static FILE* stbiw__fopen( char const* filename, char const* mode ) -{ - FILE* f; -#if defined( _WIN32 ) && defined( STBIW_WINDOWS_UTF8 ) - wchar_t wMode[64]; - wchar_t wFilename[1024]; - if( 0 - == MultiByteToWideChar( - 65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof( wFilename ) / sizeof( *wFilename ) ) ) - return 0; - - if( 0 == MultiByteToWideChar( 65001 /* UTF8 */, 0, mode, -1, wMode, sizeof( wMode ) / sizeof( *wMode ) ) ) - return 0; - -#if defined( _MSC_VER ) && _MSC_VER >= 1400 - if( 0 != _wfopen_s( &f, wFilename, wMode ) ) - f = 0; -#else - f = _wfopen( wFilename, wMode ); -#endif - -#elif defined( _MSC_VER ) && _MSC_VER >= 1400 - if( 0 != fopen_s( &f, filename, mode ) ) - f = 0; -#else - f = fopen( filename, mode ); -#endif - return f; -} - -static int stbi__start_write_file( stbi__write_context* s, const char* filename ) -{ - FILE* f = stbiw__fopen( filename, "wb" ); - stbi__start_write_callbacks( s, stbi__stdio_write, (void*) f ); - return f != NULL; -} - -static void stbi__end_write_file( stbi__write_context* s ) -{ - fclose( (FILE*) s->context ); -} - -#endif // !STBI_WRITE_NO_STDIO - -typedef unsigned int stbiw_uint32; -typedef int stb_image_write_test[sizeof( stbiw_uint32 ) == 4 ? 1 : -1]; - -static void stbiw__writefv( stbi__write_context* s, const char* fmt, va_list v ) -{ - while( *fmt ) - { - switch( *fmt++ ) - { - case ' ': - break; - case '1': { - unsigned char x = STBIW_UCHAR( va_arg( v, int ) ); - s->func( s->context, &x, 1 ); - break; - } - case '2': { - int x = va_arg( v, int ); - unsigned char b[2]; - b[0] = STBIW_UCHAR( x ); - b[1] = STBIW_UCHAR( x >> 8 ); - s->func( s->context, b, 2 ); - break; - } - case '4': { - stbiw_uint32 x = va_arg( v, int ); - unsigned char b[4]; - b[0] = STBIW_UCHAR( x ); - b[1] = STBIW_UCHAR( x >> 8 ); - b[2] = STBIW_UCHAR( x >> 16 ); - b[3] = STBIW_UCHAR( x >> 24 ); - s->func( s->context, b, 4 ); - break; - } - default: - STBIW_ASSERT( 0 ); - return; - } - } -} - -static void stbiw__writef( stbi__write_context* s, const char* fmt, ... ) -{ - va_list v; - va_start( v, fmt ); - stbiw__writefv( s, fmt, v ); - va_end( v ); -} - -static void stbiw__write_flush( stbi__write_context* s ) -{ - if( s->buf_used ) - { - s->func( s->context, &s->buffer, s->buf_used ); - s->buf_used = 0; - } -} - -static void stbiw__putc( stbi__write_context* s, unsigned char c ) -{ - s->func( s->context, &c, 1 ); -} - -static void stbiw__write1( stbi__write_context* s, unsigned char a ) -{ - if( (size_t) s->buf_used + 1 > sizeof( s->buffer ) ) - stbiw__write_flush( s ); - s->buffer[s->buf_used++] = a; -} - -static void stbiw__write3( stbi__write_context* s, unsigned char a, unsigned char b, unsigned char c ) -{ - int n; - if( (size_t) s->buf_used + 3 > sizeof( s->buffer ) ) - stbiw__write_flush( s ); - n = s->buf_used; - s->buf_used = n + 3; - s->buffer[n + 0] = a; - s->buffer[n + 1] = b; - s->buffer[n + 2] = c; -} - -static void -stbiw__write_pixel( stbi__write_context* s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char* d ) -{ - unsigned char bg[3] = { 255, 0, 255 }, px[3]; - int k; - - if( write_alpha < 0 ) - stbiw__write1( s, d[comp - 1] ); - - switch( comp ) - { - case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case - case 1: - if( expand_mono ) - stbiw__write3( s, d[0], d[0], d[0] ); // monochrome bmp - else - stbiw__write1( s, d[0] ); // monochrome TGA - break; - case 4: - if( !write_alpha ) - { - // composite against pink background - for( k = 0; k < 3; ++k ) - px[k] = bg[k] + ( ( d[k] - bg[k] ) * d[3] ) / 255; - stbiw__write3( s, px[1 - rgb_dir], px[1], px[1 + rgb_dir] ); - break; - } - /* FALLTHROUGH */ - case 3: - stbiw__write3( s, d[1 - rgb_dir], d[1], d[1 + rgb_dir] ); - break; - } - if( write_alpha > 0 ) - stbiw__write1( s, d[comp - 1] ); -} - -static void stbiw__write_pixels( stbi__write_context* s, - int rgb_dir, - int vdir, - int x, - int y, - int comp, - void* data, - int write_alpha, - int scanline_pad, - int expand_mono ) -{ - stbiw_uint32 zero = 0; - int i, j, j_end; - - if( y <= 0 ) - return; - - if( stbi__flip_vertically_on_write ) - vdir *= -1; - - if( vdir < 0 ) - { - j_end = -1; - j = y - 1; - } - else - { - j_end = y; - j = 0; - } - - for( ; j != j_end; j += vdir ) - { - for( i = 0; i < x; ++i ) - { - unsigned char* d = (unsigned char*) data + ( j * x + i ) * comp; - stbiw__write_pixel( s, rgb_dir, comp, write_alpha, expand_mono, d ); - } - stbiw__write_flush( s ); - s->func( s->context, &zero, scanline_pad ); - } -} - -static int stbiw__outfile( stbi__write_context* s, - int rgb_dir, - int vdir, - int x, - int y, - int comp, - int expand_mono, - void* data, - int alpha, - int pad, - const char* fmt, - ... ) -{ - if( y < 0 || x < 0 ) - { - return 0; - } - else - { - va_list v; - va_start( v, fmt ); - stbiw__writefv( s, fmt, v ); - va_end( v ); - stbiw__write_pixels( s, rgb_dir, vdir, x, y, comp, data, alpha, pad, expand_mono ); - return 1; - } -} - -static int stbi_write_bmp_core( stbi__write_context* s, int x, int y, int comp, const void* data ) -{ - if( comp != 4 ) - { - // write RGB bitmap - int pad = ( -x * 3 ) & 3; - return stbiw__outfile( s, - -1, - -1, - x, - y, - comp, - 1, - (void*) data, - 0, - pad, - "11 4 22 4" - "4 44 22 444444", - 'B', - 'M', - 14 + 40 + ( x * 3 + pad ) * y, - 0, - 0, - 14 + 40, // file header - 40, - x, - y, - 1, - 24, - 0, - 0, - 0, - 0, - 0, - 0 ); // bitmap header - } - else - { - // RGBA bitmaps need a v4 header - // use BI_BITFIELDS mode with 32bpp and alpha mask - // (straight BI_RGB with alpha mask doesn't work in most readers) - return stbiw__outfile( s, - -1, - -1, - x, - y, - comp, - 1, - (void*) data, - 1, - 0, - "11 4 22 4" - "4 44 22 444444 4444 4 444 444 444 444", - 'B', - 'M', - 14 + 108 + x * y * 4, - 0, - 0, - 14 + 108, // file header - 108, - x, - y, - 1, - 32, - 3, - 0, - 0, - 0, - 0, - 0, - 0xff0000, - 0xff00, - 0xff, - 0xff000000u, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0, - 0 ); // bitmap V4 header - } -} - -STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) -{ - stbi__write_context s = { 0 }; - stbi__start_write_callbacks( &s, func, context ); - return stbi_write_bmp_core( &s, x, y, comp, data ); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_bmp( char const* filename, int x, int y, int comp, const void* data ) -{ - stbi__write_context s = { 0 }; - if( stbi__start_write_file( &s, filename ) ) - { - int r = stbi_write_bmp_core( &s, x, y, comp, data ); - stbi__end_write_file( &s ); - return r; - } - else - return 0; -} -#endif //! STBI_WRITE_NO_STDIO - -static int stbi_write_tga_core( stbi__write_context* s, int x, int y, int comp, void* data ) -{ - int has_alpha = ( comp == 2 || comp == 4 ); - int colorbytes = has_alpha ? comp - 1 : comp; - int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 - - if( y < 0 || x < 0 ) - return 0; - - if( !stbi_write_tga_with_rle ) - { - return stbiw__outfile( s, - -1, - -1, - x, - y, - comp, - 0, - (void*) data, - has_alpha, - 0, - "111 221 2222 11", - 0, - 0, - format, - 0, - 0, - 0, - 0, - 0, - x, - y, - ( colorbytes + has_alpha ) * 8, - has_alpha * 8 ); - } - else - { - int i, j, k; - int jend, jdir; - - stbiw__writef( s, - "111 221 2222 11", - 0, - 0, - format + 8, - 0, - 0, - 0, - 0, - 0, - x, - y, - ( colorbytes + has_alpha ) * 8, - has_alpha * 8 ); - - if( stbi__flip_vertically_on_write ) - { - j = 0; - jend = y; - jdir = 1; - } - else - { - j = y - 1; - jend = -1; - jdir = -1; - } - for( ; j != jend; j += jdir ) - { - unsigned char* row = (unsigned char*) data + j * x * comp; - int len; - - for( i = 0; i < x; i += len ) - { - unsigned char* begin = row + i * comp; - int diff = 1; - len = 1; - - if( i < x - 1 ) - { - ++len; - diff = memcmp( begin, row + ( i + 1 ) * comp, comp ); - if( diff ) - { - const unsigned char* prev = begin; - for( k = i + 2; k < x && len < 128; ++k ) - { - if( memcmp( prev, row + k * comp, comp ) ) - { - prev += comp; - ++len; - } - else - { - --len; - break; - } - } - } - else - { - for( k = i + 2; k < x && len < 128; ++k ) - { - if( !memcmp( begin, row + k * comp, comp ) ) - { - ++len; - } - else - { - break; - } - } - } - } - - if( diff ) - { - unsigned char header = STBIW_UCHAR( len - 1 ); - stbiw__write1( s, header ); - for( k = 0; k < len; ++k ) - { - stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin + k * comp ); - } - } - else - { - unsigned char header = STBIW_UCHAR( len - 129 ); - stbiw__write1( s, header ); - stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin ); - } - } - } - stbiw__write_flush( s ); - } - return 1; -} - -STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) -{ - stbi__write_context s = { 0 }; - stbi__start_write_callbacks( &s, func, context ); - return stbi_write_tga_core( &s, x, y, comp, (void*) data ); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_tga( char const* filename, int x, int y, int comp, const void* data ) -{ - stbi__write_context s = { 0 }; - if( stbi__start_write_file( &s, filename ) ) - { - int r = stbi_write_tga_core( &s, x, y, comp, (void*) data ); - stbi__end_write_file( &s ); - return r; - } - else - return 0; -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR writer -// by Baldur Karlsson - -#define stbiw__max( a, b ) ( ( a ) > ( b ) ? ( a ) : ( b ) ) - -#ifndef STBI_WRITE_NO_STDIO - -static void stbiw__linear_to_rgbe( unsigned char* rgbe, float* linear ) -{ - int exponent; - float maxcomp = stbiw__max( linear[0], stbiw__max( linear[1], linear[2] ) ); - - if( maxcomp < 1e-32f ) - { - rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; - } - else - { - float normalize = (float) frexp( maxcomp, &exponent ) * 256.0f / maxcomp; - - rgbe[0] = (unsigned char) ( linear[0] * normalize ); - rgbe[1] = (unsigned char) ( linear[1] * normalize ); - rgbe[2] = (unsigned char) ( linear[2] * normalize ); - rgbe[3] = (unsigned char) ( exponent + 128 ); - } -} - -static void stbiw__write_run_data( stbi__write_context* s, int length, unsigned char databyte ) -{ - unsigned char lengthbyte = STBIW_UCHAR( length + 128 ); - STBIW_ASSERT( length + 128 <= 255 ); - s->func( s->context, &lengthbyte, 1 ); - s->func( s->context, &databyte, 1 ); -} - -static void stbiw__write_dump_data( stbi__write_context* s, int length, unsigned char* data ) -{ - unsigned char lengthbyte = STBIW_UCHAR( length ); - STBIW_ASSERT( length <= 128 ); // inconsistent with spec but consistent with official code - s->func( s->context, &lengthbyte, 1 ); - s->func( s->context, data, length ); -} - -static void -stbiw__write_hdr_scanline( stbi__write_context* s, int width, int ncomp, unsigned char* scratch, float* scanline ) -{ - unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; - unsigned char rgbe[4]; - float linear[3]; - int x; - - scanlineheader[2] = ( width & 0xff00 ) >> 8; - scanlineheader[3] = ( width & 0x00ff ); - - /* skip RLE for images too small or large */ - if( width < 8 || width >= 32768 ) - { - for( x = 0; x < width; x++ ) - { - switch( ncomp ) - { - case 4: /* fallthrough */ - case 3: - linear[2] = scanline[x * ncomp + 2]; - linear[1] = scanline[x * ncomp + 1]; - linear[0] = scanline[x * ncomp + 0]; - break; - default: - linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; - break; - } - stbiw__linear_to_rgbe( rgbe, linear ); - s->func( s->context, rgbe, 4 ); - } - } - else - { - int c, r; - /* encode into scratch buffer */ - for( x = 0; x < width; x++ ) - { - switch( ncomp ) - { - case 4: /* fallthrough */ - case 3: - linear[2] = scanline[x * ncomp + 2]; - linear[1] = scanline[x * ncomp + 1]; - linear[0] = scanline[x * ncomp + 0]; - break; - default: - linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; - break; - } - stbiw__linear_to_rgbe( rgbe, linear ); - scratch[x + width * 0] = rgbe[0]; - scratch[x + width * 1] = rgbe[1]; - scratch[x + width * 2] = rgbe[2]; - scratch[x + width * 3] = rgbe[3]; - } - - s->func( s->context, scanlineheader, 4 ); - - /* RLE each component separately */ - for( c = 0; c < 4; c++ ) - { - unsigned char* comp = &scratch[width * c]; - - x = 0; - while( x < width ) - { - // find first run - r = x; - while( r + 2 < width ) - { - if( comp[r] == comp[r + 1] && comp[r] == comp[r + 2] ) - break; - ++r; - } - if( r + 2 >= width ) - r = width; - // dump up to first run - while( x < r ) - { - int len = r - x; - if( len > 128 ) - len = 128; - stbiw__write_dump_data( s, len, &comp[x] ); - x += len; - } - // if there's a run, output it - if( r + 2 < width ) - { // same test as what we break out of in search loop, so only true if we break'd - // find next byte after run - while( r < width && comp[r] == comp[x] ) - ++r; - // output run up to r - while( x < r ) - { - int len = r - x; - if( len > 127 ) - len = 127; - stbiw__write_run_data( s, len, comp[x] ); - x += len; - } - } - } - } - } -} - -static int stbi_write_hdr_core( stbi__write_context* s, int x, int y, int comp, float* data ) -{ - if( y <= 0 || x <= 0 || data == NULL ) - return 0; - else - { - // Each component is stored separately. Allocate scratch space for full output scanline. - unsigned char* scratch = (unsigned char*) STBIW_MALLOC( x * 4 ); - int i, len; - char buffer[128]; - char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; - s->func( s->context, header, sizeof( header ) - 1 ); - -#ifdef __STDC_LIB_EXT1__ - len = sprintf_s( buffer, sizeof( buffer ), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); -#else - len = sprintf( buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); -#endif - s->func( s->context, buffer, len ); - - for( i = 0; i < y; i++ ) - stbiw__write_hdr_scanline( - s, x, comp, scratch, data + comp * x * ( stbi__flip_vertically_on_write ? y - 1 - i : i ) ); - STBIW_FREE( scratch ); - return 1; - } -} - -STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const float* data ) -{ - stbi__write_context s = { 0 }; - stbi__start_write_callbacks( &s, func, context ); - return stbi_write_hdr_core( &s, x, y, comp, (float*) data ); -} - -STBIWDEF int stbi_write_hdr( char const* filename, int x, int y, int comp, const float* data ) -{ - stbi__write_context s = { 0 }; - if( stbi__start_write_file( &s, filename ) ) - { - int r = stbi_write_hdr_core( &s, x, y, comp, (float*) data ); - stbi__end_write_file( &s ); - return r; - } - else - return 0; -} -#endif // STBI_WRITE_NO_STDIO - -////////////////////////////////////////////////////////////////////////////// -// -// PNG writer -// - -#ifndef STBIW_ZLIB_COMPRESS -// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() -#define stbiw__sbraw( a ) ( (int*) (void*) ( a ) - 2 ) -#define stbiw__sbm( a ) stbiw__sbraw( a )[0] -#define stbiw__sbn( a ) stbiw__sbraw( a )[1] - -#define stbiw__sbneedgrow( a, n ) ( ( a ) == 0 || stbiw__sbn( a ) + n >= stbiw__sbm( a ) ) -#define stbiw__sbmaybegrow( a, n ) ( stbiw__sbneedgrow( a, ( n ) ) ? stbiw__sbgrow( a, n ) : 0 ) -#define stbiw__sbgrow( a, n ) stbiw__sbgrowf( (void**) &( a ), ( n ), sizeof( *( a ) ) ) - -#define stbiw__sbpush( a, v ) ( stbiw__sbmaybegrow( a, 1 ), ( a )[stbiw__sbn( a )++] = ( v ) ) -#define stbiw__sbcount( a ) ( ( a ) ? stbiw__sbn( a ) : 0 ) -#define stbiw__sbfree( a ) ( ( a ) ? STBIW_FREE( stbiw__sbraw( a ) ), 0 : 0 ) - -static void* stbiw__sbgrowf( void** arr, int increment, int itemsize ) -{ - int m = *arr ? 2 * stbiw__sbm( *arr ) + increment : increment + 1; - void* p = STBIW_REALLOC_SIZED( *arr ? stbiw__sbraw( *arr ) : 0, - *arr ? ( stbiw__sbm( *arr ) * itemsize + sizeof( int ) * 2 ) : 0, - itemsize * m + sizeof( int ) * 2 ); - STBIW_ASSERT( p ); - if( p ) - { - if( !*arr ) - ( (int*) p )[1] = 0; - *arr = (void*) ( (int*) p + 2 ); - stbiw__sbm( *arr ) = m; - } - return *arr; -} - -static unsigned char* stbiw__zlib_flushf( unsigned char* data, unsigned int* bitbuffer, int* bitcount ) -{ - while( *bitcount >= 8 ) - { - stbiw__sbpush( data, STBIW_UCHAR( *bitbuffer ) ); - *bitbuffer >>= 8; - *bitcount -= 8; - } - return data; -} - -static int stbiw__zlib_bitrev( int code, int codebits ) -{ - int res = 0; - while( codebits-- ) - { - res = ( res << 1 ) | ( code & 1 ); - code >>= 1; - } - return res; -} - -static unsigned int stbiw__zlib_countm( unsigned char* a, unsigned char* b, int limit ) -{ - int i; - for( i = 0; i < limit && i < 258; ++i ) - if( a[i] != b[i] ) - break; - return i; -} - -static unsigned int stbiw__zhash( unsigned char* data ) -{ - stbiw_uint32 hash = data[0] + ( data[1] << 8 ) + ( data[2] << 16 ); - hash ^= hash << 3; - hash += hash >> 5; - hash ^= hash << 4; - hash += hash >> 17; - hash ^= hash << 25; - hash += hash >> 6; - return hash; -} - -#define stbiw__zlib_flush() ( out = stbiw__zlib_flushf( out, &bitbuf, &bitcount ) ) -#define stbiw__zlib_add( code, codebits ) \ - ( bitbuf |= ( code ) << bitcount, bitcount += ( codebits ), stbiw__zlib_flush() ) -#define stbiw__zlib_huffa( b, c ) stbiw__zlib_add( stbiw__zlib_bitrev( b, c ), c ) -// default huffman tables -#define stbiw__zlib_huff1( n ) stbiw__zlib_huffa( 0x30 + ( n ), 8 ) -#define stbiw__zlib_huff2( n ) stbiw__zlib_huffa( 0x190 + ( n ) - 144, 9 ) -#define stbiw__zlib_huff3( n ) stbiw__zlib_huffa( 0 + ( n ) - 256, 7 ) -#define stbiw__zlib_huff4( n ) stbiw__zlib_huffa( 0xc0 + ( n ) - 280, 8 ) -#define stbiw__zlib_huff( n ) \ - ( ( n ) <= 143 ? stbiw__zlib_huff1( n ) \ - : ( n ) <= 255 ? stbiw__zlib_huff2( n ) \ - : ( n ) <= 279 ? stbiw__zlib_huff3( n ) \ - : stbiw__zlib_huff4( n ) ) -#define stbiw__zlib_huffb( n ) ( ( n ) <= 143 ? stbiw__zlib_huff1( n ) : stbiw__zlib_huff2( n ) ) - -#define stbiw__ZHASH 16384 - -#endif // STBIW_ZLIB_COMPRESS - -STBIWDEF unsigned char* stbi_zlib_compress( unsigned char* data, int data_len, int* out_len, int quality ) -{ -#ifdef STBIW_ZLIB_COMPRESS - // user provided a zlib compress implementation, use that - return STBIW_ZLIB_COMPRESS( data, data_len, out_len, quality ); -#else // use builtin - static unsigned short lengthc[] = { 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, - 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 259 }; - static unsigned char lengtheb[] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, - 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 }; - static unsigned short distc[] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, - 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, - 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 32768 }; - static unsigned char disteb[] = { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, - 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13 }; - unsigned int bitbuf = 0; - int i, j, bitcount = 0; - unsigned char* out = NULL; - unsigned char*** hash_table = (unsigned char***) STBIW_MALLOC( stbiw__ZHASH * sizeof( unsigned char** ) ); - if( hash_table == NULL ) - return NULL; - if( quality < 5 ) - quality = 5; - - stbiw__sbpush( out, 0x78 ); // DEFLATE 32K window - stbiw__sbpush( out, 0x5e ); // FLEVEL = 1 - stbiw__zlib_add( 1, 1 ); // BFINAL = 1 - stbiw__zlib_add( 1, 2 ); // BTYPE = 1 -- fixed huffman - - for( i = 0; i < stbiw__ZHASH; ++i ) - hash_table[i] = NULL; - - i = 0; - while( i < data_len - 3 ) - { - // hash next 3 bytes of data to be compressed - int h = stbiw__zhash( data + i ) & ( stbiw__ZHASH - 1 ), best = 3; - unsigned char* bestloc = 0; - unsigned char** hlist = hash_table[h]; - int n = stbiw__sbcount( hlist ); - for( j = 0; j < n; ++j ) - { - if( hlist[j] - data > i - 32768 ) - { // if entry lies within window - int d = stbiw__zlib_countm( hlist[j], data + i, data_len - i ); - if( d >= best ) - { - best = d; - bestloc = hlist[j]; - } - } - } - // when hash table entry is too long, delete half the entries - if( hash_table[h] && stbiw__sbn( hash_table[h] ) == 2 * quality ) - { - STBIW_MEMMOVE( hash_table[h], hash_table[h] + quality, sizeof( hash_table[h][0] ) * quality ); - stbiw__sbn( hash_table[h] ) = quality; - } - stbiw__sbpush( hash_table[h], data + i ); - - if( bestloc ) - { - // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal - h = stbiw__zhash( data + i + 1 ) & ( stbiw__ZHASH - 1 ); - hlist = hash_table[h]; - n = stbiw__sbcount( hlist ); - for( j = 0; j < n; ++j ) - { - if( hlist[j] - data > i - 32767 ) - { - int e = stbiw__zlib_countm( hlist[j], data + i + 1, data_len - i - 1 ); - if( e > best ) - { // if next match is better, bail on current match - bestloc = NULL; - break; - } - } - } - } - - if( bestloc ) - { - int d = (int) ( data + i - bestloc ); // distance back - STBIW_ASSERT( d <= 32767 && best <= 258 ); - for( j = 0; best > lengthc[j + 1] - 1; ++j ) - ; - stbiw__zlib_huff( j + 257 ); - if( lengtheb[j] ) - stbiw__zlib_add( best - lengthc[j], lengtheb[j] ); - for( j = 0; d > distc[j + 1] - 1; ++j ) - ; - stbiw__zlib_add( stbiw__zlib_bitrev( j, 5 ), 5 ); - if( disteb[j] ) - stbiw__zlib_add( d - distc[j], disteb[j] ); - i += best; - } - else - { - stbiw__zlib_huffb( data[i] ); - ++i; - } - } - // write out final bytes - for( ; i < data_len; ++i ) - stbiw__zlib_huffb( data[i] ); - stbiw__zlib_huff( 256 ); // end of block - // pad with 0 bits to byte boundary - while( bitcount ) - stbiw__zlib_add( 0, 1 ); - - for( i = 0; i < stbiw__ZHASH; ++i ) - (void) stbiw__sbfree( hash_table[i] ); - STBIW_FREE( hash_table ); - - // store uncompressed instead if compression was worse - if( stbiw__sbn( out ) > data_len + 2 + ( ( data_len + 32766 ) / 32767 ) * 5 ) - { - stbiw__sbn( out ) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1 - for( j = 0; j < data_len; ) - { - int blocklen = data_len - j; - if( blocklen > 32767 ) - blocklen = 32767; - stbiw__sbpush( out, data_len - j == blocklen ); // BFINAL = ?, BTYPE = 0 -- no compression - stbiw__sbpush( out, STBIW_UCHAR( blocklen ) ); // LEN - stbiw__sbpush( out, STBIW_UCHAR( blocklen >> 8 ) ); - stbiw__sbpush( out, STBIW_UCHAR( ~blocklen ) ); // NLEN - stbiw__sbpush( out, STBIW_UCHAR( ~blocklen >> 8 ) ); - memcpy( out + stbiw__sbn( out ), data + j, blocklen ); - stbiw__sbn( out ) += blocklen; - j += blocklen; - } - } - - { - // compute adler32 on input - unsigned int s1 = 1, s2 = 0; - int blocklen = (int) ( data_len % 5552 ); - j = 0; - while( j < data_len ) - { - for( i = 0; i < blocklen; ++i ) - { - s1 += data[j + i]; - s2 += s1; - } - s1 %= 65521; - s2 %= 65521; - j += blocklen; - blocklen = 5552; - } - stbiw__sbpush( out, STBIW_UCHAR( s2 >> 8 ) ); - stbiw__sbpush( out, STBIW_UCHAR( s2 ) ); - stbiw__sbpush( out, STBIW_UCHAR( s1 >> 8 ) ); - stbiw__sbpush( out, STBIW_UCHAR( s1 ) ); - } - *out_len = stbiw__sbn( out ); - // make returned pointer freeable - STBIW_MEMMOVE( stbiw__sbraw( out ), out, *out_len ); - return (unsigned char*) stbiw__sbraw( out ); -#endif // STBIW_ZLIB_COMPRESS -} - -static unsigned int stbiw__crc32( unsigned char* buffer, int len ) -{ -#ifdef STBIW_CRC32 - return STBIW_CRC32( buffer, len ); -#else - static unsigned int crc_table[256] = { - 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0eDB8832, - 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, - 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, - 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, - 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, - 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, - 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, - 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, - 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, - 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, - 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, - 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, - 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, - 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, - 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, - 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, - 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, - 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, - 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, - 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, - 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, - 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, - 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, - 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, - 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, - 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, - 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, - 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, - 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; - - unsigned int crc = ~0u; - int i; - for( i = 0; i < len; ++i ) - crc = ( crc >> 8 ) ^ crc_table[buffer[i] ^ ( crc & 0xff )]; - return ~crc; -#endif -} - -#define stbiw__wpng4( o, a, b, c, d ) \ - ( ( o )[0] = STBIW_UCHAR( a ), \ - ( o )[1] = STBIW_UCHAR( b ), \ - ( o )[2] = STBIW_UCHAR( c ), \ - ( o )[3] = STBIW_UCHAR( d ), \ - ( o ) += 4 ) -#define stbiw__wp32( data, v ) stbiw__wpng4( data, ( v ) >> 24, ( v ) >> 16, ( v ) >> 8, ( v ) ); -#define stbiw__wptag( data, s ) stbiw__wpng4( data, s[0], s[1], s[2], s[3] ) - -static void stbiw__wpcrc( unsigned char** data, int len ) -{ - unsigned int crc = stbiw__crc32( *data - len - 4, len + 4 ); - stbiw__wp32( *data, crc ); -} - -static unsigned char stbiw__paeth( int a, int b, int c ) -{ - int p = a + b - c, pa = abs( p - a ), pb = abs( p - b ), pc = abs( p - c ); - if( pa <= pb && pa <= pc ) - return STBIW_UCHAR( a ); - if( pb <= pc ) - return STBIW_UCHAR( b ); - return STBIW_UCHAR( c ); -} - -// @OPTIMIZE: provide an option that always forces left-predict or paeth predict -static void stbiw__encode_png_line( unsigned char* pixels, - int stride_bytes, - int width, - int height, - int y, - int n, - int filter_type, - signed char* line_buffer ) -{ - static int mapping[] = { 0, 1, 2, 3, 4 }; - static int firstmap[] = { 0, 1, 0, 5, 6 }; - int* mymap = ( y != 0 ) ? mapping : firstmap; - int i; - int type = mymap[filter_type]; - unsigned char* z = pixels + stride_bytes * ( stbi__flip_vertically_on_write ? height - 1 - y : y ); - int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; - - if( type == 0 ) - { - memcpy( line_buffer, z, width * n ); - return; - } - - // first loop isn't optimized since it's just one pixel - for( i = 0; i < n; ++i ) - { - switch( type ) - { - case 1: - line_buffer[i] = z[i]; - break; - case 2: - line_buffer[i] = z[i] - z[i - signed_stride]; - break; - case 3: - line_buffer[i] = z[i] - ( z[i - signed_stride] >> 1 ); - break; - case 4: - line_buffer[i] = (signed char) ( z[i] - stbiw__paeth( 0, z[i - signed_stride], 0 ) ); - break; - case 5: - line_buffer[i] = z[i]; - break; - case 6: - line_buffer[i] = z[i]; - break; - } - } - switch( type ) - { - case 1: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - z[i - n]; - break; - case 2: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - z[i - signed_stride]; - break; - case 3: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - ( ( z[i - n] + z[i - signed_stride] ) >> 1 ); - break; - case 4: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - stbiw__paeth( z[i - n], z[i - signed_stride], z[i - signed_stride - n] ); - break; - case 5: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - ( z[i - n] >> 1 ); - break; - case 6: - for( i = n; i < width * n; ++i ) - line_buffer[i] = z[i] - stbiw__paeth( z[i - n], 0, 0 ); - break; - } -} - -STBIWDEF unsigned char* -stbi_write_png_to_mem( const unsigned char* pixels, int stride_bytes, int x, int y, int n, int* out_len ) -{ - int force_filter = stbi_write_force_png_filter; - int ctype[5] = { -1, 0, 4, 2, 6 }; - unsigned char sig[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; - unsigned char *out, *o, *filt, *zlib; - signed char* line_buffer; - int j, zlen; - - if( stride_bytes == 0 ) - stride_bytes = x * n; - - if( force_filter >= 5 ) - { - force_filter = -1; - } - - filt = (unsigned char*) STBIW_MALLOC( ( x * n + 1 ) * y ); - if( !filt ) - return 0; - line_buffer = (signed char*) STBIW_MALLOC( x * n ); - if( !line_buffer ) - { - STBIW_FREE( filt ); - return 0; - } - for( j = 0; j < y; ++j ) - { - int filter_type; - if( force_filter > -1 ) - { - filter_type = force_filter; - stbiw__encode_png_line( (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, force_filter, line_buffer ); - } - else - { // Estimate the best filter by running through all of them: - int best_filter = 0, best_filter_val = 0x7fffffff, est, i; - for( filter_type = 0; filter_type < 5; filter_type++ ) - { - stbiw__encode_png_line( - (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, filter_type, line_buffer ); - - // Estimate the entropy of the line using this filter; the less, the better. - est = 0; - for( i = 0; i < x * n; ++i ) - { - est += abs( (signed char) line_buffer[i] ); - } - if( est < best_filter_val ) - { - best_filter_val = est; - best_filter = filter_type; - } - } - if( filter_type != best_filter ) - { // If the last iteration already got us the best filter, don't redo it - stbiw__encode_png_line( - (unsigned char*) ( pixels ), stride_bytes, x, y, j, n, best_filter, line_buffer ); - filter_type = best_filter; - } - } - // when we get here, filter_type contains the filter type, and line_buffer contains the data - filt[j * ( x * n + 1 )] = (unsigned char) filter_type; - STBIW_MEMMOVE( filt + j * ( x * n + 1 ) + 1, line_buffer, x * n ); - } - STBIW_FREE( line_buffer ); - zlib = stbi_zlib_compress( filt, y * ( x * n + 1 ), &zlen, stbi_write_png_compression_level ); - STBIW_FREE( filt ); - if( !zlib ) - return 0; - - // each tag requires 12 bytes of overhead - out = (unsigned char*) STBIW_MALLOC( 8 + 12 + 13 + 12 + zlen + 12 ); - if( !out ) - return 0; - *out_len = 8 + 12 + 13 + 12 + zlen + 12; - - o = out; - STBIW_MEMMOVE( o, sig, 8 ); - o += 8; - stbiw__wp32( o, 13 ); // header length - stbiw__wptag( o, "IHDR" ); - stbiw__wp32( o, x ); - stbiw__wp32( o, y ); - *o++ = 8; - *o++ = STBIW_UCHAR( ctype[n] ); - *o++ = 0; - *o++ = 0; - *o++ = 0; - stbiw__wpcrc( &o, 13 ); - - stbiw__wp32( o, zlen ); - stbiw__wptag( o, "IDAT" ); - STBIW_MEMMOVE( o, zlib, zlen ); - o += zlen; - STBIW_FREE( zlib ); - stbiw__wpcrc( &o, zlen ); - - stbiw__wp32( o, 0 ); - stbiw__wptag( o, "IEND" ); - stbiw__wpcrc( &o, 0 ); - - STBIW_ASSERT( o == out + *out_len ); - - return out; -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_png( char const* filename, int x, int y, int comp, const void* data, int stride_bytes ) -{ - FILE* f; - int len; - unsigned char* png = stbi_write_png_to_mem( (const unsigned char*) data, stride_bytes, x, y, comp, &len ); - if( png == NULL ) - return 0; - - f = stbiw__fopen( filename, "wb" ); - if( !f ) - { - STBIW_FREE( png ); - return 0; - } - fwrite( png, 1, len, f ); - fclose( f ); - STBIW_FREE( png ); - return 1; -} -#endif - -STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, - void* context, - int x, - int y, - int comp, - const void* data, - int stride_bytes ) -{ - int len; - unsigned char* png = stbi_write_png_to_mem( (const unsigned char*) data, stride_bytes, x, y, comp, &len ); - if( png == NULL ) - return 0; - func( context, png, len ); - STBIW_FREE( png ); - return 1; -} - -/* *************************************************************************** - * - * JPEG writer - * - * This is based on Jon Olick's jo_jpeg.cpp: - * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html - */ - -static const unsigned char stbiw__jpg_ZigZag[] = { 0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, - 3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53, - 10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60, - 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 }; - -static void stbiw__jpg_writeBits( stbi__write_context* s, int* bitBufP, int* bitCntP, const unsigned short* bs ) -{ - int bitBuf = *bitBufP, bitCnt = *bitCntP; - bitCnt += bs[1]; - bitBuf |= bs[0] << ( 24 - bitCnt ); - while( bitCnt >= 8 ) - { - unsigned char c = ( bitBuf >> 16 ) & 255; - stbiw__putc( s, c ); - if( c == 255 ) - { - stbiw__putc( s, 0 ); - } - bitBuf <<= 8; - bitCnt -= 8; - } - *bitBufP = bitBuf; - *bitCntP = bitCnt; -} - -static void -stbiw__jpg_DCT( float* d0p, float* d1p, float* d2p, float* d3p, float* d4p, float* d5p, float* d6p, float* d7p ) -{ - float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; - float z1, z2, z3, z4, z5, z11, z13; - - float tmp0 = d0 + d7; - float tmp7 = d0 - d7; - float tmp1 = d1 + d6; - float tmp6 = d1 - d6; - float tmp2 = d2 + d5; - float tmp5 = d2 - d5; - float tmp3 = d3 + d4; - float tmp4 = d3 - d4; - - // Even part - float tmp10 = tmp0 + tmp3; // phase 2 - float tmp13 = tmp0 - tmp3; - float tmp11 = tmp1 + tmp2; - float tmp12 = tmp1 - tmp2; - - d0 = tmp10 + tmp11; // phase 3 - d4 = tmp10 - tmp11; - - z1 = ( tmp12 + tmp13 ) * 0.707106781f; // c4 - d2 = tmp13 + z1; // phase 5 - d6 = tmp13 - z1; - - // Odd part - tmp10 = tmp4 + tmp5; // phase 2 - tmp11 = tmp5 + tmp6; - tmp12 = tmp6 + tmp7; - - // The rotator is modified from fig 4-8 to avoid extra negations. - z5 = ( tmp10 - tmp12 ) * 0.382683433f; // c6 - z2 = tmp10 * 0.541196100f + z5; // c2-c6 - z4 = tmp12 * 1.306562965f + z5; // c2+c6 - z3 = tmp11 * 0.707106781f; // c4 - - z11 = tmp7 + z3; // phase 5 - z13 = tmp7 - z3; - - *d5p = z13 + z2; // phase 6 - *d3p = z13 - z2; - *d1p = z11 + z4; - *d7p = z11 - z4; - - *d0p = d0; - *d2p = d2; - *d4p = d4; - *d6p = d6; -} - -static void stbiw__jpg_calcBits( int val, unsigned short bits[2] ) -{ - int tmp1 = val < 0 ? -val : val; - val = val < 0 ? val - 1 : val; - bits[1] = 1; - while( tmp1 >>= 1 ) - { - ++bits[1]; - } - bits[0] = val & ( ( 1 << bits[1] ) - 1 ); -} - -static int stbiw__jpg_processDU( stbi__write_context* s, - int* bitBuf, - int* bitCnt, - float* CDU, - int du_stride, - float* fdtbl, - int DC, - const unsigned short HTDC[256][2], - const unsigned short HTAC[256][2] ) -{ - const unsigned short EOB[2] = { HTAC[0x00][0], HTAC[0x00][1] }; - const unsigned short M16zeroes[2] = { HTAC[0xF0][0], HTAC[0xF0][1] }; - int dataOff, i, j, n, diff, end0pos, x, y; - int DU[64]; - - // DCT rows - for( dataOff = 0, n = du_stride * 8; dataOff < n; dataOff += du_stride ) - { - stbiw__jpg_DCT( &CDU[dataOff], - &CDU[dataOff + 1], - &CDU[dataOff + 2], - &CDU[dataOff + 3], - &CDU[dataOff + 4], - &CDU[dataOff + 5], - &CDU[dataOff + 6], - &CDU[dataOff + 7] ); - } - // DCT columns - for( dataOff = 0; dataOff < 8; ++dataOff ) - { - stbiw__jpg_DCT( &CDU[dataOff], - &CDU[dataOff + du_stride], - &CDU[dataOff + du_stride * 2], - &CDU[dataOff + du_stride * 3], - &CDU[dataOff + du_stride * 4], - &CDU[dataOff + du_stride * 5], - &CDU[dataOff + du_stride * 6], - &CDU[dataOff + du_stride * 7] ); - } - // Quantize/descale/zigzag the coefficients - for( y = 0, j = 0; y < 8; ++y ) - { - for( x = 0; x < 8; ++x, ++j ) - { - float v; - i = y * du_stride + x; - v = CDU[i] * fdtbl[j]; - // DU[stbiw__jpg_ZigZag[j]] = (int)(v < 0 ? ceilf(v - 0.5f) : floorf(v + 0.5f)); - // ceilf() and floorf() are C99, not C89, but I /think/ they're not needed here anyway? - DU[stbiw__jpg_ZigZag[j]] = (int) ( v < 0 ? v - 0.5f : v + 0.5f ); - } - } - - // Encode DC - diff = DU[0] - DC; - if( diff == 0 ) - { - stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[0] ); - } - else - { - unsigned short bits[2]; - stbiw__jpg_calcBits( diff, bits ); - stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[bits[1]] ); - stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); - } - // Encode ACs - end0pos = 63; - for( ; ( end0pos > 0 ) && ( DU[end0pos] == 0 ); --end0pos ) - { - } - // end0pos = first element in reverse order !=0 - if( end0pos == 0 ) - { - stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); - return DU[0]; - } - for( i = 1; i <= end0pos; ++i ) - { - int startpos = i; - int nrzeroes; - unsigned short bits[2]; - for( ; DU[i] == 0 && i <= end0pos; ++i ) - { - } - nrzeroes = i - startpos; - if( nrzeroes >= 16 ) - { - int lng = nrzeroes >> 4; - int nrmarker; - for( nrmarker = 1; nrmarker <= lng; ++nrmarker ) - stbiw__jpg_writeBits( s, bitBuf, bitCnt, M16zeroes ); - nrzeroes &= 15; - } - stbiw__jpg_calcBits( DU[i], bits ); - stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTAC[( nrzeroes << 4 ) + bits[1]] ); - stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); - } - if( end0pos != 63 ) - { - stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); - } - return DU[0]; -} - -static int stbi_write_jpg_core( stbi__write_context* s, int width, int height, int comp, const void* data, int quality ) -{ - // Constants that don't pollute global namespace - static const unsigned char std_dc_luminance_nrcodes[] = { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; - static const unsigned char std_dc_luminance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; - static const unsigned char std_ac_luminance_nrcodes[] = { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; - static const unsigned char std_ac_luminance_values[] = { - 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, - 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, - 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, - 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, - 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, - 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, - 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, - 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, - 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; - static const unsigned char std_dc_chrominance_nrcodes[] = { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; - static const unsigned char std_dc_chrominance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; - static const unsigned char std_ac_chrominance_nrcodes[] = { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; - static const unsigned char std_ac_chrominance_values[] = { - 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, - 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, - 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, - 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, - 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, - 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, - 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, - 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, - 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; - // Huffman tables - static const unsigned short YDC_HT[256][2] = { { 0, 2 }, - { 2, 3 }, - { 3, 3 }, - { 4, 3 }, - { 5, 3 }, - { 6, 3 }, - { 14, 4 }, - { 30, 5 }, - { 62, 6 }, - { 126, 7 }, - { 254, 8 }, - { 510, 9 } }; - static const unsigned short UVDC_HT[256][2] = { { 0, 2 }, - { 1, 2 }, - { 2, 2 }, - { 6, 3 }, - { 14, 4 }, - { 30, 5 }, - { 62, 6 }, - { 126, 7 }, - { 254, 8 }, - { 510, 9 }, - { 1022, 10 }, - { 2046, 11 } }; - static const unsigned short YAC_HT[256][2] = { - { 10, 4 }, { 0, 2 }, { 1, 2 }, { 4, 3 }, { 11, 4 }, { 26, 5 }, { 120, 7 }, - { 248, 8 }, { 1014, 10 }, { 65410, 16 }, { 65411, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 12, 4 }, { 27, 5 }, { 121, 7 }, { 502, 9 }, - { 2038, 11 }, { 65412, 16 }, { 65413, 16 }, { 65414, 16 }, { 65415, 16 }, { 65416, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 28, 5 }, { 249, 8 }, - { 1015, 10 }, { 4084, 12 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 65420, 16 }, { 65421, 16 }, - { 65422, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 58, 6 }, { 503, 9 }, { 4085, 12 }, { 65423, 16 }, { 65424, 16 }, { 65425, 16 }, { 65426, 16 }, - { 65427, 16 }, { 65428, 16 }, { 65429, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 59, 6 }, { 1016, 10 }, { 65430, 16 }, { 65431, 16 }, { 65432, 16 }, - { 65433, 16 }, { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 122, 7 }, { 2039, 11 }, { 65438, 16 }, - { 65439, 16 }, { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 123, 7 }, - { 4086, 12 }, { 65446, 16 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, - { 65452, 16 }, { 65453, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 250, 8 }, { 4087, 12 }, { 65454, 16 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, - { 65458, 16 }, { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 504, 9 }, { 32704, 15 }, { 65462, 16 }, { 65463, 16 }, - { 65464, 16 }, { 65465, 16 }, { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 505, 9 }, { 65470, 16 }, - { 65471, 16 }, { 65472, 16 }, { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, - { 65478, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 506, 9 }, { 65479, 16 }, { 65480, 16 }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, - { 65485, 16 }, { 65486, 16 }, { 65487, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 1017, 10 }, { 65488, 16 }, { 65489, 16 }, { 65490, 16 }, { 65491, 16 }, - { 65492, 16 }, { 65493, 16 }, { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 1018, 10 }, { 65497, 16 }, { 65498, 16 }, - { 65499, 16 }, { 65500, 16 }, { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 2040, 11 }, - { 65506, 16 }, { 65507, 16 }, { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, - { 65513, 16 }, { 65514, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 65515, 16 }, { 65516, 16 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, - { 65521, 16 }, { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 2041, 11 }, { 65525, 16 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, - { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; - static const unsigned short UVAC_HT[256][2] = { - { 0, 2 }, { 1, 2 }, { 4, 3 }, { 10, 4 }, { 24, 5 }, { 25, 5 }, { 56, 6 }, - { 120, 7 }, { 500, 9 }, { 1014, 10 }, { 4084, 12 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 11, 4 }, { 57, 6 }, { 246, 8 }, { 501, 9 }, - { 2038, 11 }, { 4085, 12 }, { 65416, 16 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 26, 5 }, { 247, 8 }, - { 1015, 10 }, { 4086, 12 }, { 32706, 15 }, { 65420, 16 }, { 65421, 16 }, { 65422, 16 }, { 65423, 16 }, - { 65424, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 27, 5 }, { 248, 8 }, { 1016, 10 }, { 4087, 12 }, { 65425, 16 }, { 65426, 16 }, { 65427, 16 }, - { 65428, 16 }, { 65429, 16 }, { 65430, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 58, 6 }, { 502, 9 }, { 65431, 16 }, { 65432, 16 }, { 65433, 16 }, - { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 65438, 16 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 59, 6 }, { 1017, 10 }, { 65439, 16 }, - { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, { 65446, 16 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 121, 7 }, - { 2039, 11 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, { 65452, 16 }, - { 65453, 16 }, { 65454, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 122, 7 }, { 2040, 11 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, { 65458, 16 }, - { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 65462, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 249, 8 }, { 65463, 16 }, { 65464, 16 }, { 65465, 16 }, - { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 65470, 16 }, { 65471, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 503, 9 }, { 65472, 16 }, - { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, { 65478, 16 }, { 65479, 16 }, - { 65480, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 504, 9 }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, { 65485, 16 }, { 65486, 16 }, - { 65487, 16 }, { 65488, 16 }, { 65489, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 505, 9 }, { 65490, 16 }, { 65491, 16 }, { 65492, 16 }, { 65493, 16 }, - { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 65497, 16 }, { 65498, 16 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 506, 9 }, { 65499, 16 }, { 65500, 16 }, - { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, { 65506, 16 }, { 65507, 16 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 2041, 11 }, - { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, { 65513, 16 }, { 65514, 16 }, - { 65515, 16 }, { 65516, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 16352, 14 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, { 65521, 16 }, - { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 65525, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 1018, 10 }, { 32707, 15 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, - { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, - { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; - static const int YQT[] = { 16, 11, 10, 16, 24, 40, 51, 61, 12, 12, 14, 19, 26, 58, 60, 55, - 14, 13, 16, 24, 40, 57, 69, 56, 14, 17, 22, 29, 51, 87, 80, 62, - 18, 22, 37, 56, 68, 109, 103, 77, 24, 35, 55, 64, 81, 104, 113, 92, - 49, 64, 78, 87, 103, 121, 120, 101, 72, 92, 95, 98, 112, 100, 103, 99 }; - static const int UVQT[] = { 17, 18, 24, 47, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, - 99, 99, 47, 66, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 }; - static const float aasf[] = { 1.0f * 2.828427125f, - 1.387039845f * 2.828427125f, - 1.306562965f * 2.828427125f, - 1.175875602f * 2.828427125f, - 1.0f * 2.828427125f, - 0.785694958f * 2.828427125f, - 0.541196100f * 2.828427125f, - 0.275899379f * 2.828427125f }; - - int row, col, i, k, subsample; - float fdtbl_Y[64], fdtbl_UV[64]; - unsigned char YTable[64], UVTable[64]; - - if( !data || !width || !height || comp > 4 || comp < 1 ) - { - return 0; - } - - quality = quality ? quality : 90; - subsample = quality <= 90 ? 1 : 0; - quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; - quality = quality < 50 ? 5000 / quality : 200 - quality * 2; - - for( i = 0; i < 64; ++i ) - { - int uvti, yti = ( YQT[i] * quality + 50 ) / 100; - YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) ( yti < 1 ? 1 : yti > 255 ? 255 : yti ); - uvti = ( UVQT[i] * quality + 50 ) / 100; - UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) ( uvti < 1 ? 1 : uvti > 255 ? 255 : uvti ); - } - - for( row = 0, k = 0; row < 8; ++row ) - { - for( col = 0; col < 8; ++col, ++k ) - { - fdtbl_Y[k] = 1 / ( YTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); - fdtbl_UV[k] = 1 / ( UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); - } - } - - // Write Headers - { - static const unsigned char head0[] = { 0xFF, 0xD8, 0xFF, 0xE0, 0, 0x10, 'J', 'F', 'I', 'F', 0, 1, 1, - 0, 0, 1, 0, 1, 0, 0, 0xFF, 0xDB, 0, 0x84, 0 }; - static const unsigned char head2[] = { 0xFF, 0xDA, 0, 0xC, 3, 1, 0, 2, 0x11, 3, 0x11, 0, 0x3F, 0 }; - const unsigned char head1[] = { 0xFF, - 0xC0, - 0, - 0x11, - 8, - (unsigned char) ( height >> 8 ), - STBIW_UCHAR( height ), - (unsigned char) ( width >> 8 ), - STBIW_UCHAR( width ), - 3, - 1, - (unsigned char) ( subsample ? 0x22 : 0x11 ), - 0, - 2, - 0x11, - 1, - 3, - 0x11, - 1, - 0xFF, - 0xC4, - 0x01, - 0xA2, - 0 }; - s->func( s->context, (void*) head0, sizeof( head0 ) ); - s->func( s->context, (void*) YTable, sizeof( YTable ) ); - stbiw__putc( s, 1 ); - s->func( s->context, UVTable, sizeof( UVTable ) ); - s->func( s->context, (void*) head1, sizeof( head1 ) ); - s->func( s->context, (void*) ( std_dc_luminance_nrcodes + 1 ), sizeof( std_dc_luminance_nrcodes ) - 1 ); - s->func( s->context, (void*) std_dc_luminance_values, sizeof( std_dc_luminance_values ) ); - stbiw__putc( s, 0x10 ); // HTYACinfo - s->func( s->context, (void*) ( std_ac_luminance_nrcodes + 1 ), sizeof( std_ac_luminance_nrcodes ) - 1 ); - s->func( s->context, (void*) std_ac_luminance_values, sizeof( std_ac_luminance_values ) ); - stbiw__putc( s, 1 ); // HTUDCinfo - s->func( s->context, (void*) ( std_dc_chrominance_nrcodes + 1 ), sizeof( std_dc_chrominance_nrcodes ) - 1 ); - s->func( s->context, (void*) std_dc_chrominance_values, sizeof( std_dc_chrominance_values ) ); - stbiw__putc( s, 0x11 ); // HTUACinfo - s->func( s->context, (void*) ( std_ac_chrominance_nrcodes + 1 ), sizeof( std_ac_chrominance_nrcodes ) - 1 ); - s->func( s->context, (void*) std_ac_chrominance_values, sizeof( std_ac_chrominance_values ) ); - s->func( s->context, (void*) head2, sizeof( head2 ) ); - } - - // Encode 8x8 macroblocks - { - static const unsigned short fillBits[] = { 0x7F, 7 }; - int DCY = 0, DCU = 0, DCV = 0; - int bitBuf = 0, bitCnt = 0; - // comp == 2 is grey+alpha (alpha is ignored) - int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; - const unsigned char* dataR = (const unsigned char*) data; - const unsigned char* dataG = dataR + ofsG; - const unsigned char* dataB = dataR + ofsB; - int x, y, pos; - if( subsample ) - { - for( y = 0; y < height; y += 16 ) - { - for( x = 0; x < width; x += 16 ) - { - float Y[256], U[256], V[256]; - for( row = y, pos = 0; row < y + 16; ++row ) - { - // row >= height => use last input row - int clamped_row = ( row < height ) ? row : height - 1; - int base_p = ( stbi__flip_vertically_on_write ? ( height - 1 - clamped_row ) : clamped_row ) - * width * comp; - for( col = x; col < x + 16; ++col, ++pos ) - { - // if col >= width => use pixel from last input column - int p = base_p + ( ( col < width ) ? col : ( width - 1 ) ) * comp; - float r = dataR[p], g = dataG[p], b = dataB[p]; - Y[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128; - U[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b; - V[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b; - } - } - DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 0, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); - DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 8, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); - DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 128, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); - DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y + 136, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT ); - - // subsample U,V - { - float subU[64], subV[64]; - int yy, xx; - for( yy = 0, pos = 0; yy < 8; ++yy ) - { - for( xx = 0; xx < 8; ++xx, ++pos ) - { - int j = yy * 32 + xx * 2; - subU[pos] = ( U[j + 0] + U[j + 1] + U[j + 16] + U[j + 17] ) * 0.25f; - subV[pos] = ( V[j + 0] + V[j + 1] + V[j + 16] + V[j + 17] ) * 0.25f; - } - } - DCU = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, subU, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT ); - DCV = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, subV, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT ); - } - } - } - } - else - { - for( y = 0; y < height; y += 8 ) - { - for( x = 0; x < width; x += 8 ) - { - float Y[64], U[64], V[64]; - for( row = y, pos = 0; row < y + 8; ++row ) - { - // row >= height => use last input row - int clamped_row = ( row < height ) ? row : height - 1; - int base_p = ( stbi__flip_vertically_on_write ? ( height - 1 - clamped_row ) : clamped_row ) - * width * comp; - for( col = x; col < x + 8; ++col, ++pos ) - { - // if col >= width => use pixel from last input column - int p = base_p + ( ( col < width ) ? col : ( width - 1 ) ) * comp; - float r = dataR[p], g = dataG[p], b = dataB[p]; - Y[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128; - U[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b; - V[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b; - } - } - - DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, Y, 8, fdtbl_Y, DCY, YDC_HT, YAC_HT ); - DCU = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, U, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT ); - DCV = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, V, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT ); - } - } - } - - // Do the bit alignment of the EOI marker - stbiw__jpg_writeBits( s, &bitBuf, &bitCnt, fillBits ); - } - - // EOI - stbiw__putc( s, 0xFF ); - stbiw__putc( s, 0xD9 ); - - return 1; -} - -STBIWDEF int -stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ) -{ - stbi__write_context s = { 0 }; - stbi__start_write_callbacks( &s, func, context ); - return stbi_write_jpg_core( &s, x, y, comp, (void*) data, quality ); -} - -#ifndef STBI_WRITE_NO_STDIO -STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ) -{ - stbi__write_context s = { 0 }; - if( stbi__start_write_file( &s, filename ) ) - { - int r = stbi_write_jpg_core( &s, x, y, comp, data, quality ); - stbi__end_write_file( &s ); - return r; - } - else - return 0; -} -#endif - -#endif // STB_IMAGE_WRITE_IMPLEMENTATION - -/* Revision history - 1.16 (2021-07-11) - make Deflate code emit uncompressed blocks when it would otherwise expand - support writing BMPs with alpha channel - 1.15 (2020-07-13) unknown - 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels - 1.13 - 1.12 - 1.11 (2019-08-11) - - 1.10 (2019-02-07) - support utf8 filenames in Windows; fix warnings and platform ifdefs - 1.09 (2018-02-11) - fix typo in zlib quality API, improve STB_I_W_STATIC in C++ - 1.08 (2018-01-29) - add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter - 1.07 (2017-07-24) - doc fix - 1.06 (2017-07-23) - writing JPEG (using Jon Olick's code) - 1.05 ??? - 1.04 (2017-03-03) - monochrome BMP expansion - 1.03 ??? - 1.02 (2016-04-02) - avoid allocating large structures on the stack - 1.01 (2016-01-16) - STBIW_REALLOC_SIZED: support allocators with no realloc support - avoid race-condition in crc initialization - minor compile issues - 1.00 (2015-09-14) - installable file IO function - 0.99 (2015-09-13) - warning fixes; TGA rle support - 0.98 (2015-04-08) - added STBIW_MALLOC, STBIW_ASSERT etc - 0.97 (2015-01-18) - fixed HDR asserts, rewrote HDR rle logic - 0.96 (2015-01-17) - add HDR output - fix monochrome BMP - 0.95 (2014-08-17) - add monochrome TGA output - 0.94 (2014-05-31) - rename private functions to avoid conflicts with stb_image.h - 0.93 (2014-05-27) - warning fixes - 0.92 (2010-08-01) - casts to unsigned char to fix warnings - 0.91 (2010-07-17) - first public release - 0.90 first internal release -*/ - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/