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image_compress_astcenc.cpp
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/**************************************************************************/
/* image_compress_astcenc.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#include "image_compress_astcenc.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include <astcenc.h>
void _compress_astc(Image *r_img, float p_lossy_quality, Image::ASTCFormat p_format) {
uint64_t start_time = OS::get_singleton()->get_ticks_msec();
// TODO: See how to handle lossy quality.
Image::Format img_format = r_img->get_format();
if (img_format >= Image::FORMAT_DXT1) {
return; // Do not compress, already compressed.
}
bool is_hdr = false;
if ((img_format >= Image::FORMAT_RH) && (img_format <= Image::FORMAT_RGBE9995)) {
is_hdr = true;
r_img->convert(Image::FORMAT_RGBAF);
} else {
r_img->convert(Image::FORMAT_RGBA8);
}
// Determine encoder output format from our enum.
Image::Format target_format = Image::FORMAT_RGBA8;
astcenc_profile profile = ASTCENC_PRF_LDR;
unsigned int block_x = 4;
unsigned int block_y = 4;
if (p_format == Image::ASTCFormat::ASTC_FORMAT_4x4) {
if (is_hdr) {
target_format = Image::FORMAT_ASTC_4x4_HDR;
profile = ASTCENC_PRF_HDR;
} else {
target_format = Image::FORMAT_ASTC_4x4;
}
} else if (p_format == Image::ASTCFormat::ASTC_FORMAT_8x8) {
if (is_hdr) {
target_format = Image::FORMAT_ASTC_8x8_HDR;
profile = ASTCENC_PRF_HDR;
} else {
target_format = Image::FORMAT_ASTC_8x8;
}
block_x = 8;
block_y = 8;
}
// Compress image data and (if required) mipmaps.
const bool mipmaps = r_img->has_mipmaps();
int width = r_img->get_width();
int height = r_img->get_height();
print_verbose(vformat("astcenc: Encoding image size %dx%d to format %s%s.", width, height, Image::get_format_name(target_format), mipmaps ? ", with mipmaps" : ""));
// Initialize astcenc.
astcenc_config config;
config.block_x = block_x;
config.block_y = block_y;
config.profile = profile;
const float quality = ASTCENC_PRE_MEDIUM;
astcenc_error status = astcenc_config_init(profile, block_x, block_y, block_x, quality, 0, &config);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
// Context allocation.
astcenc_context *context;
const unsigned int thread_count = OS::get_singleton()->get_processor_count();
status = astcenc_context_alloc(&config, thread_count, &context);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
// Compress image.
Vector<uint8_t> image_data = r_img->get_data();
uint8_t *slices = image_data.ptrw();
astcenc_image image;
image.dim_x = width;
image.dim_y = height;
image.dim_z = 1;
image.data_type = ASTCENC_TYPE_U8;
if (is_hdr) {
image.data_type = ASTCENC_TYPE_F32;
}
image.data = reinterpret_cast<void **>(&slices);
// Compute the number of ASTC blocks in each dimension.
unsigned int block_count_x = (width + block_x - 1) / block_x;
unsigned int block_count_y = (height + block_y - 1) / block_y;
size_t comp_len = block_count_x * block_count_y * 16;
Vector<uint8_t> compressed_data;
compressed_data.resize(comp_len);
compressed_data.fill(0);
const astcenc_swizzle swizzle = {
ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
};
status = astcenc_compress_image(context, &image, &swizzle, compressed_data.ptrw(), comp_len, 0);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: ASTC image compression failed: %s.", astcenc_get_error_string(status)));
// Replace original image with compressed one.
r_img->set_data(width, height, mipmaps, target_format, compressed_data);
print_verbose(vformat("astcenc: Encoding took %s ms.", rtos(OS::get_singleton()->get_ticks_msec() - start_time)));
}
void _decompress_astc(Image *r_img) {
uint64_t start_time = OS::get_singleton()->get_ticks_msec();
// Determine decompression parameters from image format.
Image::Format img_format = r_img->get_format();
bool is_hdr = false;
unsigned int block_x = 0;
unsigned int block_y = 0;
if (img_format == Image::FORMAT_ASTC_4x4) {
block_x = 4;
block_y = 4;
is_hdr = false;
} else if (img_format == Image::FORMAT_ASTC_4x4_HDR) {
block_x = 4;
block_y = 4;
is_hdr = true;
} else if (img_format == Image::FORMAT_ASTC_8x8) {
block_x = 8;
block_y = 8;
is_hdr = false;
} else if (img_format == Image::FORMAT_ASTC_8x8_HDR) {
block_x = 8;
block_y = 8;
is_hdr = true;
} else {
ERR_FAIL_MSG("astcenc: Cannot decompress Image with a non-ASTC format.");
}
// Initialize astcenc.
astcenc_profile profile = ASTCENC_PRF_LDR;
if (is_hdr) {
profile = ASTCENC_PRF_HDR;
}
astcenc_config config;
const float quality = ASTCENC_PRE_MEDIUM;
astcenc_error status = astcenc_config_init(profile, block_x, block_y, block_x, quality, 0, &config);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
// Context allocation.
astcenc_context *context = nullptr;
const unsigned int thread_count = OS::get_singleton()->get_processor_count();
status = astcenc_context_alloc(&config, thread_count, &context);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
// Decompress image.
const bool mipmaps = r_img->has_mipmaps();
int width = r_img->get_width();
int height = r_img->get_height();
astcenc_image image;
image.dim_x = width;
image.dim_y = height;
image.dim_z = 1;
image.data_type = ASTCENC_TYPE_U8;
Image::Format target_format = Image::FORMAT_RGBA8;
if (is_hdr) {
target_format = Image::FORMAT_RGBAF;
image.data_type = ASTCENC_TYPE_F32;
}
Vector<uint8_t> image_data = r_img->get_data();
Vector<uint8_t> new_image_data;
new_image_data.resize(Image::get_image_data_size(width, height, target_format, false));
new_image_data.fill(0);
uint8_t *slices = new_image_data.ptrw();
image.data = reinterpret_cast<void **>(&slices);
const astcenc_swizzle swizzle = {
ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
};
status = astcenc_decompress_image(context, image_data.ptr(), image_data.size(), &image, &swizzle, 0);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: ASTC decompression failed: %s.", astcenc_get_error_string(status)));
ERR_FAIL_COND_MSG(image.dim_z > 1,
"astcenc: ASTC decompression failed because this is a 3D texture, which is not supported.");
// Replace original image with compressed one.
Image::Format image_format = Image::FORMAT_RGBA8;
if (image.data_type == ASTCENC_TYPE_F32) {
image_format = Image::FORMAT_RGBAF;
} else if (image.data_type == ASTCENC_TYPE_U8) {
image_format = Image::FORMAT_RGBA8;
} else if (image.data_type == ASTCENC_TYPE_F16) {
image_format = Image::FORMAT_RGBAH;
} else {
ERR_FAIL_MSG("astcenc: ASTC decompression failed with an unknown format.");
}
r_img->set_data(image.dim_x, image.dim_y, mipmaps, image_format, new_image_data);
print_verbose(vformat("astcenc: Decompression took %s ms.", rtos(OS::get_singleton()->get_ticks_msec() - start_time)));
}