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ddswrite.c
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ddswrite.c
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/*
DDS GIMP plugin
Copyright (C) 2004-2012 Shawn Kirst <[email protected]>,
with parts (C) 2003 Arne Reuter <[email protected]> where specified.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor
Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <gtk/gtk.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "ddsplugin.h"
#include "dds.h"
#include "dxt.h"
#include "mipmap.h"
#include "endian.h"
#include "imath.h"
#include "color.h"
static gint save_dialog(gint32 image_id, gint32 drawable);
static void save_dialog_response(GtkWidget *widget, gint response_id, gpointer data);
static int write_image(FILE *fp, gint32 image_id, gint32 drawable_id);
static int runme = 0;
enum
{
COMBO_VALUE, COMBO_STRING, COMBO_SENSITIVE
};
static const char *cubemap_face_names[4][6] =
{
{
"positive x", "negative x",
"positive y", "negative y",
"positive z", "negative z"
},
{
"pos x", "neg x",
"pos y", "neg y",
"pos z", "neg z",
},
{
"+x", "-x",
"+y", "-y",
"+z", "-z"
},
{
"right", "left",
"top", "bottom",
"back", "front"
}
};
static gint cubemap_faces[6];
static gint is_cubemap = 0;
static gint is_volume = 0;
static gint is_array = 0;
static gint is_mipmap_chain_valid = 0;
static GtkWidget *compress_opt;
static GtkWidget *format_opt;
static GtkWidget *mipmap_opt;
static GtkWidget *mipmap_filter_opt;
static GtkWidget *mipmap_wrap_opt;
static GtkWidget *srgb_chk;
static GtkWidget *gamma_chk;
static GtkWidget *gamma_spin;
static GtkWidget *pm_chk;
static GtkWidget *alpha_coverage_chk;
static GtkWidget *alpha_test_threshold_spin;
typedef struct string_value_s
{
int value;
char *string;
} string_value_t;
static string_value_t compression_strings[] =
{
{DDS_COMPRESS_NONE, "None"},
{DDS_COMPRESS_BC1, "BC1 / DXT1"},
{DDS_COMPRESS_BC2, "BC2 / DXT3"},
{DDS_COMPRESS_BC3, "BC3 / DXT5"},
{DDS_COMPRESS_BC3N, "BC3nm / DXT5nm"},
{DDS_COMPRESS_BC4, "BC4 / ATI1 (3Dc+)"},
{DDS_COMPRESS_BC5, "BC5 / ATI2 (3Dc)"},
{DDS_COMPRESS_RXGB, "RXGB (DXT5)"},
{DDS_COMPRESS_AEXP, "Alpha Exponent (DXT5)"},
{DDS_COMPRESS_YCOCG, "YCoCg (DXT5)"},
{DDS_COMPRESS_YCOCGS, "YCoCg scaled (DXT5)"},
{-1, 0}
};
static string_value_t format_strings[] =
{
{DDS_FORMAT_DEFAULT, "Default"},
{DDS_FORMAT_RGB8, "RGB8"},
{DDS_FORMAT_RGBA8, "RGBA8"},
{DDS_FORMAT_BGR8, "BGR8"},
{DDS_FORMAT_ABGR8, "ABGR8"},
{DDS_FORMAT_R5G6B5, "R5G6B5"},
{DDS_FORMAT_RGBA4, "RGBA4"},
{DDS_FORMAT_RGB5A1, "RGB5A1"},
{DDS_FORMAT_RGB10A2, "RGB10A2"},
{DDS_FORMAT_R3G3B2, "R3G3B2"},
{DDS_FORMAT_A8, "A8"},
{DDS_FORMAT_L8, "L8"},
{DDS_FORMAT_L8A8, "L8A8"},
{DDS_FORMAT_AEXP, "AExp"},
{DDS_FORMAT_YCOCG, "YCoCg"},
{-1, 0}
};
static string_value_t mipmap_strings[] =
{
{DDS_MIPMAP_NONE, "No mipmaps"},
{DDS_MIPMAP_GENERATE, "Generate mipmaps"},
{DDS_MIPMAP_EXISTING, "Use existing mipmaps"},
{-1, 0}
};
static string_value_t mipmap_filter_strings[] =
{
{DDS_MIPMAP_FILTER_DEFAULT, "Default"},
{DDS_MIPMAP_FILTER_NEAREST, "Nearest"},
{DDS_MIPMAP_FILTER_BOX, "Box"},
{DDS_MIPMAP_FILTER_TRIANGLE, "Triangle"},
{DDS_MIPMAP_FILTER_QUADRATIC, "Quadratic"},
{DDS_MIPMAP_FILTER_BSPLINE, "B-Spline"},
{DDS_MIPMAP_FILTER_MITCHELL, "Mitchell"},
{DDS_MIPMAP_FILTER_LANCZOS, "Lanczos"},
{DDS_MIPMAP_FILTER_KAISER, "Kaiser"},
{-1, 0}
};
static string_value_t mipmap_wrap_strings[] =
{
{DDS_MIPMAP_WRAP_DEFAULT, "Default"},
{DDS_MIPMAP_WRAP_MIRROR, "Mirror"},
{DDS_MIPMAP_WRAP_REPEAT, "Repeat"},
{DDS_MIPMAP_WRAP_CLAMP, "Clamp"},
{-1, 0}
};
static string_value_t save_type_strings[] =
{
{DDS_SAVE_SELECTED_LAYER, "Image / Selected layer"},
{DDS_SAVE_CUBEMAP, "As cube map"},
{DDS_SAVE_VOLUMEMAP, "As volume map"},
{DDS_SAVE_ARRAY, "As texture array"},
{-1, 0}
};
static struct
{
int format;
DXGI_FORMAT dxgi_format;
int bpp;
int alpha;
unsigned int rmask;
unsigned int gmask;
unsigned int bmask;
unsigned int amask;
} format_info[] =
{
{DDS_FORMAT_RGB8, DXGI_FORMAT_UNKNOWN, 3, 0, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000},
{DDS_FORMAT_RGBA8, DXGI_FORMAT_B8G8R8A8_UNORM, 4, 1, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000},
{DDS_FORMAT_BGR8, DXGI_FORMAT_UNKNOWN, 3, 0, 0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000},
{DDS_FORMAT_ABGR8, DXGI_FORMAT_R8G8B8A8_UNORM, 4, 1, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000},
{DDS_FORMAT_R5G6B5, DXGI_FORMAT_B5G6R5_UNORM, 2, 0, 0x0000f800, 0x000007e0, 0x0000001f, 0x00000000},
{DDS_FORMAT_RGBA4, DXGI_FORMAT_B4G4R4A4_UNORM, 2, 1, 0x00000f00, 0x000000f0, 0x0000000f, 0x0000f000},
{DDS_FORMAT_RGB5A1, DXGI_FORMAT_B5G5R5A1_UNORM, 2, 1, 0x00007c00, 0x000003e0, 0x0000001f, 0x00008000},
{DDS_FORMAT_RGB10A2, DXGI_FORMAT_R10G10B10A2_UNORM, 4, 1, 0x000003ff, 0x000ffc00, 0x3ff00000, 0xc0000000},
{DDS_FORMAT_R3G3B2, DXGI_FORMAT_UNKNOWN, 1, 0, 0x000000e0, 0x0000001c, 0x00000003, 0x00000000},
{DDS_FORMAT_A8, DXGI_FORMAT_A8_UNORM, 1, 0, 0x00000000, 0x00000000, 0x00000000, 0x000000ff},
{DDS_FORMAT_L8, DXGI_FORMAT_R8_UNORM, 1, 0, 0x000000ff, 0x000000ff, 0x000000ff, 0x00000000},
{DDS_FORMAT_L8A8, DXGI_FORMAT_UNKNOWN, 2, 1, 0x000000ff, 0x000000ff, 0x000000ff, 0x0000ff00},
{DDS_FORMAT_AEXP, DXGI_FORMAT_B8G8R8A8_UNORM, 4, 1, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000},
{DDS_FORMAT_YCOCG, DXGI_FORMAT_B8G8R8A8_UNORM, 4, 1, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000}
};
static int check_mipmaps(gint32 image_id, int savetype)
{
gint *layers, num_layers;
int i, j, w, h, mipw, miph, num_mipmaps, num_surfaces = 0;
int min_surfaces = 1, max_surfaces = 1;
int valid = 1;
GimpImageType type;
/* not handling volume maps for the moment... */
if(savetype == DDS_SAVE_VOLUMEMAP)
return(0);
if(savetype == DDS_SAVE_CUBEMAP)
{
min_surfaces = 6;
max_surfaces = 6;
}
else if(savetype == DDS_SAVE_ARRAY)
{
min_surfaces = 2;
max_surfaces = INT_MAX;
}
layers = gimp_image_get_layers(image_id, &num_layers);
w = gimp_image_width(image_id);
h = gimp_image_height(image_id);
num_mipmaps = get_num_mipmaps(w, h);
type = gimp_drawable_type(layers[0]);
for(i = 0; i < num_layers; ++i)
{
if(type != gimp_drawable_type(layers[i]))
return(0);
if((gimp_drawable_width(layers[i]) == w) &&
(gimp_drawable_height(layers[i]) == h))
++num_surfaces;
}
if((num_surfaces < min_surfaces) ||
(num_surfaces > max_surfaces) ||
(num_layers != (num_surfaces * num_mipmaps)))
return(0);
for(i = 0; valid && i < num_layers; i += num_mipmaps)
{
if((gimp_drawable_width(layers[i]) != w) ||
(gimp_drawable_height(layers[i]) != h))
{
valid = 0;
break;
}
for(j = 1; j < num_mipmaps; ++j)
{
mipw = w >> j;
miph = h >> j;
if(mipw < 1) mipw = 1;
if(miph < 1) miph = 1;
if((gimp_drawable_width(layers[i + j]) != mipw) ||
(gimp_drawable_height(layers[i + j]) != miph))
{
valid = 0;
break;
}
}
}
return(valid);
}
static int check_cubemap(gint32 image_id)
{
gint *layers, num_layers;
int cubemap = 1, i, j, k, w, h;
char *layer_name;
GimpImageType type;
layers = gimp_image_get_layers(image_id, &num_layers);
if(num_layers < 6) return(0);
/* check for a valid cubemap with mipmap layers */
if(num_layers > 6)
{
/* check that mipmap layers are in order for a cubemap */
if(!check_mipmaps(image_id, DDS_SAVE_CUBEMAP))
return(0);
/* invalidate cubemap faces */
for(i = 0; i < 6; ++i)
cubemap_faces[i] = -1;
/* find the mipmap level 0 layers */
w = gimp_image_width(image_id);
h = gimp_image_height(image_id);
for(i = 0; i < num_layers; ++i)
{
if((gimp_drawable_width(layers[i]) != w) ||
(gimp_drawable_height(layers[i]) != h))
continue;
layer_name = (char*)gimp_drawable_get_name(layers[i]);
for(j = 0; j < 6; ++j)
{
for(k = 0; k < 4; ++k)
{
if(strstr(layer_name, cubemap_face_names[k][j]))
{
if(cubemap_faces[j] == -1)
{
cubemap_faces[j] = layers[i];
break;
}
}
}
}
}
/* check for 6 valid faces */
for(i = 0; i < 6; ++i)
{
if(cubemap_faces[i] == -1)
{
cubemap = 0;
break;
}
}
/* make sure they are all the same type */
if(cubemap)
{
type = gimp_drawable_type(cubemap_faces[0]);
for(i = 1; i < 6 && cubemap; ++i)
{
if(gimp_drawable_type(cubemap_faces[i]) != type)
cubemap = 0;
}
}
}
if(num_layers == 6)
{
/* invalidate cubemap faces */
for(i = 0; i < 6; ++i)
cubemap_faces[i] = -1;
for(i = 0; i < 6; ++i)
{
layer_name = (char*)gimp_drawable_get_name(layers[i]);
for(j = 0; j < 6; ++j)
{
for(k = 0; k < 4; ++k)
{
if(strstr(layer_name, cubemap_face_names[k][j]))
{
if(cubemap_faces[j] == -1)
{
cubemap_faces[j] = layers[i];
break;
}
}
}
}
}
/* check for 6 valid faces */
for(i = 0; i < 6; ++i)
{
if(cubemap_faces[i] == -1)
{
cubemap = 0;
break;
}
}
/* make sure they are all the same size */
if(cubemap)
{
w = gimp_drawable_width(cubemap_faces[0]);
h = gimp_drawable_height(cubemap_faces[0]);
for(i = 1; i < 6 && cubemap; ++i)
{
if((gimp_drawable_width(cubemap_faces[i]) != w) ||
(gimp_drawable_height(cubemap_faces[i]) != h))
cubemap = 0;
}
}
/* make sure they are all the same type */
if(cubemap)
{
type = gimp_drawable_type(cubemap_faces[0]);
for(i = 1; i < 6 && cubemap; ++i)
{
if(gimp_drawable_type(cubemap_faces[i]) != type)
cubemap = 0;
}
}
}
return(cubemap);
}
static int check_volume(gint32 image_id)
{
gint *layers, num_layers;
int volume = 0, i, w, h;
GimpImageType type;
layers = gimp_image_get_layers(image_id, &num_layers);
if(num_layers > 1)
{
volume = 1;
/* make sure all layers are the same size */
w = gimp_drawable_width(layers[0]);
h = gimp_drawable_height(layers[0]);
for(i = 1; i < num_layers && volume; ++i)
{
if((gimp_drawable_width(layers[i]) != w) ||
(gimp_drawable_height(layers[i]) != h))
volume = 0;
}
if(volume)
{
/* make sure all layers are the same type */
type = gimp_drawable_type(layers[0]);
for(i = 1; i < num_layers && volume; ++i)
{
if(gimp_drawable_type(layers[i]) != type)
volume = 0;
}
}
}
return(volume);
}
static int check_array(gint32 image_id)
{
gint *layers, num_layers;
int array = 0, i, w, h;
GimpImageType type;
if(check_mipmaps(image_id, DDS_SAVE_ARRAY))
return(1);
layers = gimp_image_get_layers(image_id, &num_layers);
if(num_layers > 1)
{
array = 1;
/* make sure all layers are the same size */
w = gimp_drawable_width(layers[0]);
h = gimp_drawable_height(layers[0]);
for(i = 1; i < num_layers && array; ++i)
{
if((gimp_drawable_width(layers[i]) != w) ||
(gimp_drawable_height(layers[i]) != h))
array = 0;
}
if(array)
{
/* make sure all layers are the same type */
type = gimp_drawable_type(layers[0]);
for(i = 1; i < num_layers; ++i)
{
if(gimp_drawable_type(layers[i]) != type)
{
array = 0;
break;
}
}
}
}
return(array);
}
static int get_array_size(gint32 image_id)
{
gint *layers, num_layers;
int i, w, h, elements = 0;
layers = gimp_image_get_layers(image_id, &num_layers);
w = gimp_image_width(image_id);
h = gimp_image_height(image_id);
for(i = 0; i < num_layers; ++i)
{
if((gimp_drawable_width(layers[i]) == w) && (gimp_drawable_height(layers[i]) == h))
++elements;
}
return(elements);
}
GimpPDBStatusType write_dds(gchar *filename, gint32 image_id, gint32 drawable_id)
{
FILE *fp;
gchar *tmp;
int rc = 0;
is_mipmap_chain_valid = check_mipmaps(image_id, dds_write_vals.savetype);
is_cubemap = check_cubemap(image_id);
is_volume = check_volume(image_id);
is_array = check_array(image_id);
if(interactive_dds)
{
if(!is_mipmap_chain_valid &&
dds_write_vals.mipmaps == DDS_MIPMAP_EXISTING)
dds_write_vals.mipmaps = DDS_MIPMAP_NONE;
if(!save_dialog(image_id, drawable_id))
return(GIMP_PDB_CANCEL);
}
else
{
if(dds_write_vals.savetype == DDS_SAVE_CUBEMAP && !is_cubemap)
{
g_message("DDS: Cannot save image as cube map");
return(GIMP_PDB_EXECUTION_ERROR);
}
if(dds_write_vals.savetype == DDS_SAVE_VOLUMEMAP && !is_volume)
{
g_message("DDS: Cannot save image as volume map");
return(GIMP_PDB_EXECUTION_ERROR);
}
if(dds_write_vals.savetype == DDS_SAVE_VOLUMEMAP &&
dds_write_vals.compression != DDS_COMPRESS_NONE)
{
g_message("DDS: Cannot save volume map with compression");
return(GIMP_PDB_EXECUTION_ERROR);
}
if(dds_write_vals.mipmaps == DDS_MIPMAP_EXISTING &&
!is_mipmap_chain_valid)
{
g_message("DDS: Cannot save with existing mipmaps as the mipmap chain is incomplete");
return(GIMP_PDB_EXECUTION_ERROR);
}
}
fp = g_fopen(filename, "wb");
if(fp == 0)
{
g_message("Error opening %s", filename);
return(GIMP_PDB_EXECUTION_ERROR);
}
if(strrchr(filename, '/'))
tmp = g_strdup_printf("Saving %s:", strrchr(filename, '/') + 1);
else
tmp = g_strdup_printf("Saving %s:", filename);
gimp_progress_init(tmp);
g_free(tmp);
rc = write_image(fp, image_id, drawable_id);
fclose(fp);
return(rc ? GIMP_PDB_SUCCESS : GIMP_PDB_EXECUTION_ERROR);
}
static void swap_rb(unsigned char *pixels, unsigned int n, int bpp)
{
unsigned int i;
unsigned char t;
for(i = 0; i < n; ++i)
{
t = pixels[bpp * i + 0];
pixels[bpp * i + 0] = pixels[bpp * i + 2];
pixels[bpp * i + 2] = t;
}
}
static void alpha_exp(unsigned char *dst, int r, int g, int b, int a)
{
float ar, ag, ab, aa;
ar = (float)r / 255.0f;
ag = (float)g / 255.0f;
ab = (float)b / 255.0f;
aa = MAX(ar, MAX(ag, ab));
if(aa < 1e-04f)
{
dst[0] = b;
dst[1] = g;
dst[2] = r;
dst[3] = 255;
return;
}
ar /= aa;
ag /= aa;
ab /= aa;
r = (int)floorf(255.0f * ar + 0.5f);
g = (int)floorf(255.0f * ag + 0.5f);
b = (int)floorf(255.0f * ab + 0.5f);
a = (int)floorf(255.0f * aa + 0.5f);
dst[0] = MAX(0, MIN(255, b));
dst[1] = MAX(0, MIN(255, g));
dst[2] = MAX(0, MIN(255, r));
dst[3] = MAX(0, MIN(255, a));
}
static void convert_pixels(unsigned char *dst, unsigned char *src,
int format, int w, int h, int d, int bpp,
unsigned char *palette, int mipmaps)
{
unsigned int i, num_pixels;
unsigned char r, g, b, a;
if(d > 0)
num_pixels = get_volume_mipmapped_size(w, h, d, 1, 0, mipmaps, DDS_COMPRESS_NONE);
else
num_pixels = get_mipmapped_size(w, h, 1, 0, mipmaps, DDS_COMPRESS_NONE);
for(i = 0; i < num_pixels; ++i)
{
if(bpp == 1)
{
if(palette)
{
r = palette[3 * src[i] + 0];
g = palette[3 * src[i] + 1];
b = palette[3 * src[i] + 2];
}
else
r = g = b = src[i];
if(format == DDS_FORMAT_A8)
a = src[i];
else
a = 255;
}
else if(bpp == 2)
{
r = g = b = src[2 * i];
a = src[2 * i + 1];
}
else if(bpp == 3)
{
b = src[3 * i + 0];
g = src[3 * i + 1];
r = src[3 * i + 2];
a = 255;
}
else
{
b = src[4 * i + 0];
g = src[4 * i + 1];
r = src[4 * i + 2];
a = src[4 * i + 3];
}
switch(format)
{
case DDS_FORMAT_RGB8:
dst[3 * i + 0] = b;
dst[3 * i + 1] = g;
dst[3 * i + 2] = r;
break;
case DDS_FORMAT_RGBA8:
dst[4 * i + 0] = b;
dst[4 * i + 1] = g;
dst[4 * i + 2] = r;
dst[4 * i + 3] = a;
break;
case DDS_FORMAT_BGR8:
dst[3 * i + 0] = r;
dst[3 * i + 1] = g;
dst[3 * i + 2] = b;
break;
case DDS_FORMAT_ABGR8:
dst[4 * i + 0] = r;
dst[4 * i + 1] = g;
dst[4 * i + 2] = b;
dst[4 * i + 3] = a;
break;
case DDS_FORMAT_R5G6B5:
PUTL16(&dst[2 * i], pack_r5g6b5(r, g, b));
break;
case DDS_FORMAT_RGBA4:
PUTL16(&dst[2 * i], pack_rgba4(r, g, b, a));
break;
case DDS_FORMAT_RGB5A1:
PUTL16(&dst[2 * i], pack_rgb5a1(r, g, b, a));
break;
case DDS_FORMAT_RGB10A2:
PUTL32(&dst[4 * i], pack_rgb10a2(r, g, b, a));
break;
case DDS_FORMAT_R3G3B2:
dst[i] = pack_r3g3b2(r, g, b);
break;
case DDS_FORMAT_A8:
dst[i] = a;
break;
case DDS_FORMAT_L8:
dst[i] = rgb_to_luminance(r, g, b);
break;
case DDS_FORMAT_L8A8:
dst[2 * i + 0] = rgb_to_luminance(r, g, b);
dst[2 * i + 1] = a;
break;
case DDS_FORMAT_YCOCG:
dst[4 * i] = a;
RGB_to_YCoCg(&dst[4 * i], r, g, b);
break;
case DDS_FORMAT_AEXP:
alpha_exp(&dst[4 * i], r, g, b, a);
break;
default:
break;
}
}
}
static void get_mipmap_chain(unsigned char *dst, int w, int h, int bpp,
gint32 image_id, gint drawable_id)
{
gint *layers, num_layers;
GimpDrawable *drawable;
GimpPixelRgn rgn;
int i, idx = 0, offset, mipw, miph;
layers = gimp_image_get_layers(image_id, &num_layers);
for(i = 0; i < num_layers; ++i)
{
if(layers[i] == drawable_id)
{
idx = i;
break;
}
}
if(i == num_layers) return;
offset = 0;
while(get_next_mipmap_dimensions(&mipw, &miph, w, h))
{
drawable = gimp_drawable_get(layers[++idx]);
if((drawable->width != mipw) || (drawable->height != miph)) return;
gimp_pixel_rgn_init(&rgn, drawable, 0, 0, mipw, miph, 0, 0);
gimp_pixel_rgn_get_rect(&rgn, dst + offset, 0, 0, mipw, miph);
/* we need BGRX or BGRA */
if(bpp >= 3)
swap_rb(dst + offset, mipw * miph, bpp);
offset += (mipw * miph * bpp);
w = mipw;
h = miph;
gimp_drawable_detach(drawable);
}
}
static void write_layer(FILE *fp, gint32 image_id, gint32 drawable_id,
int w, int h, int bpp, int fmtbpp, int mipmaps)
{
GimpDrawable *drawable;
GimpPixelRgn rgn;
GimpImageBaseType basetype;
GimpImageType type;
unsigned char *src, *dst, *fmtdst, *tmp;
unsigned char *palette = NULL;
int i, c, x, y, size, fmtsize, offset, colors;
int compression = dds_write_vals.compression;
int flags = 0;
basetype = gimp_image_base_type(image_id);
type = gimp_drawable_type(drawable_id);
drawable = gimp_drawable_get(drawable_id);
src = g_malloc(w * h * bpp);
gimp_pixel_rgn_init(&rgn, drawable, 0, 0, w, h, 0, 0);
gimp_pixel_rgn_get_rect(&rgn, src, 0, 0, w, h);
if(basetype == GIMP_INDEXED)
{
palette = gimp_image_get_colormap(image_id, &colors);
if(type == GIMP_INDEXEDA_IMAGE)
{
tmp = g_malloc(w * h);
for(i = 0; i < w * h; ++i)
tmp[i] = src[2 * i];
g_free(src);
src = tmp;
bpp = 1;
}
}
/* we want and assume BGRA ordered pixels for bpp >= 3 from here and
onwards */
if(bpp >= 3)
swap_rb(src, w * h, bpp);
if(compression == DDS_COMPRESS_BC3N)
{
if(bpp != 4)
{
fmtsize = w * h * 4;
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_RGBA8, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = 4;
}
for(y = 0; y < drawable->height; ++y)
{
for(x = 0; x < drawable->width; ++x)
{
/* set alpha to red (x) */
src[y * (drawable->width * 4) + (x * 4) + 3] =
src[y * (drawable->width * 4) + (x * 4) + 2];
/* set red to 1 */
src[y * (drawable->width * 4) + (x * 4) + 2] = 255;
}
}
}
/* RXGB (Doom3) */
if(compression == DDS_COMPRESS_RXGB)
{
if(bpp != 4)
{
fmtsize = w * h * 4;
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_RGBA8, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = 4;
}
for(y = 0; y < drawable->height; ++y)
{
for(x = 0; x < drawable->width; ++x)
{
/* swap red and alpha */
c = src[y * (drawable->width * 4) + (x * 4) + 3];
src[y * (drawable->width * 4) + (x * 4) + 3] =
src[y * (drawable->width * 4) + (x * 4) + 2];
src[y * (drawable->width * 4) + (x * 4) + 2] = c;
}
}
}
if(compression == DDS_COMPRESS_YCOCG ||
compression == DDS_COMPRESS_YCOCGS) /* convert to YCoCG */
{
fmtsize = w * h * 4;
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_YCOCG, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = 4;
}
if(compression == DDS_COMPRESS_AEXP)
{
fmtsize = w * h * 4;
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_AEXP, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = 4;
}
if(compression == DDS_COMPRESS_NONE)
{
if(mipmaps > 1)
{
/* pre-convert indexed images to RGB for better quality mipmaps
if a pixel format conversion is requested */
if(dds_write_vals.format > DDS_FORMAT_DEFAULT && basetype == GIMP_INDEXED)
{
fmtsize = get_mipmapped_size(w, h, 3, 0, mipmaps, DDS_COMPRESS_NONE);
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_RGB8, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = 3;
palette = NULL;
}
size = get_mipmapped_size(w, h, bpp, 0, mipmaps, DDS_COMPRESS_NONE);
dst = g_malloc(size);
if(dds_write_vals.mipmaps == DDS_MIPMAP_GENERATE)
{
generate_mipmaps(dst, src, w, h, bpp, palette != NULL,
mipmaps,
dds_write_vals.mipmap_filter,
dds_write_vals.mipmap_wrap,
dds_write_vals.gamma_correct + dds_write_vals.srgb,
dds_write_vals.gamma,
dds_write_vals.preserve_alpha_coverage,
dds_write_vals.alpha_test_threshold);
}
else
{
memcpy(dst, src, w * h * bpp);
get_mipmap_chain(dst + (w * h * bpp), w, h, bpp, image_id, drawable_id);
}
if(dds_write_vals.format > DDS_FORMAT_DEFAULT)
{
fmtsize = get_mipmapped_size(w, h, fmtbpp, 0, mipmaps,
DDS_COMPRESS_NONE);
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, dst, dds_write_vals.format, w, h, 0, bpp,
palette, mipmaps);
g_free(dst);
dst = fmtdst;
bpp = fmtbpp;
}
offset = 0;
for(i = 0; i < mipmaps; ++i)
{
size = get_mipmapped_size(w, h, bpp, i, 1, DDS_COMPRESS_NONE);
fwrite(dst + offset, 1, size, fp);
offset += size;
}
g_free(dst);
}
else
{
if(dds_write_vals.format > DDS_FORMAT_DEFAULT)
{
fmtdst = g_malloc(h * w * fmtbpp);
convert_pixels(fmtdst, src, dds_write_vals.format, w, h, 0, bpp,
palette, 1);
g_free(src);
src = fmtdst;
bpp = fmtbpp;
}
fwrite(src, 1, h * w * bpp, fp);
}
}
else
{
size = get_mipmapped_size(w, h, bpp, 0, mipmaps, compression);
dst = g_malloc(size);
if(basetype == GIMP_INDEXED)
{
fmtsize = get_mipmapped_size(w, h, 3, 0, mipmaps,
DDS_COMPRESS_NONE);
fmtdst = g_malloc(fmtsize);
convert_pixels(fmtdst, src, DDS_FORMAT_RGB8, w, h, 0, bpp,
palette, mipmaps);
g_free(src);
src = fmtdst;
bpp = 3;
}