2 * Copyright (C) 2018 The Geeqie Team
4 * Author: Wolfgang Lieff
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 * Derived from dds_reader written by:
21 * Copyright (c) 2015 Kenji Sasaki
22 * Released under the MIT license.
23 * https://github.com/npedotnet/DDSReader/blob/master/LICENSE
27 #include "image-load-dds.h"
29 #include <sys/types.h>
31 #include <gdk-pixbuf/gdk-pixbuf.h>
32 #include <glib-object.h>
35 #include "image-load.h"
40 struct ImageLoaderDDS : public ImageLoaderBackend
43 ~ImageLoaderDDS() override;
45 void init(AreaUpdatedCb area_updated_cb, SizePreparedCb size_prepared_cb, AreaPreparedCb area_prepared_cb, gpointer data) override;
46 gboolean write(const guchar *buf, gsize &chunk_size, gsize count, GError **error) override;
47 GdkPixbuf *get_pixbuf() override;
48 gchar *get_format_name() override;
49 gchar **get_format_mime_types() override;
52 AreaUpdatedCb area_updated_cb;
58 void free_buffer(guchar *pixels, gpointer)
63 uint ddsGetHeight(unsigned const char * buffer) {
64 return (buffer[12] & 0xFF) | (buffer[13] & 0xFF) << 8 | (buffer[14] & 0xFF) << 16 | (buffer[15] & 0xFF) << 24;
67 uint ddsGetWidth(unsigned const char * buffer) {
68 return (buffer[16] & 0xFF) | (buffer[17] & 0xFF) << 8 | (buffer[18] & 0xFF) << 16 | (buffer[19] & 0xFF) << 24;
71 #pragma GCC diagnostic push
72 #pragma GCC diagnostic ignored "-Wunused-function"
73 uint ddsGetMipmap_unused(unsigned const char * buffer) {
74 return (buffer[28] & 0xFF) | (buffer[29] & 0xFF) << 8 | (buffer[30] & 0xFF) << 16 | (buffer[31] & 0xFF) << 24;
76 #pragma GCC diagnostic pop
78 uint ddsGetPixelFormatFlags(unsigned const char * buffer) {
79 return (buffer[80] & 0xFF) | (buffer[81] & 0xFF) << 8 | (buffer[82] & 0xFF) << 16 | (buffer[83] & 0xFF) << 24;
82 uint ddsGetFourCC(unsigned const char * buffer) {
83 return (buffer[84] & 0xFF) << 24 | (buffer[85] & 0xFF) << 16 | (buffer[86] & 0xFF) << 8 | (buffer[87] & 0xFF);
86 uint ddsGetBitCount(unsigned const char * buffer) {
87 return (buffer[88] & 0xFF) | (buffer[89] & 0xFF) << 8 | (buffer[90] & 0xFF) << 16 | (buffer[91] & 0xFF) << 24;
90 uint ddsGetRedMask(unsigned const char * buffer) {
91 return (buffer[92] & 0xFF) | (buffer[93] & 0xFF) << 8 | (buffer[94] & 0xFF) << 16 | (buffer[95] & 0xFF) << 24;
94 uint ddsGetGreenMask(unsigned const char * buffer) {
95 return (buffer[96] & 0xFF) | (buffer[97] & 0xFF) << 8 | (buffer[98] & 0xFF) << 16 | (buffer[99] & 0xFF) << 24;
98 uint ddsGetBlueMask(unsigned const char * buffer) {
99 return (buffer[100] & 0xFF) | (buffer[101] & 0xFF) << 8 | (buffer[102] & 0xFF) << 16 | (buffer[103] & 0xFF) << 24;
102 uint ddsGetAlphaMask(unsigned const char * buffer) {
103 return (buffer[104] & 0xFF) | (buffer[105] & 0xFF) << 8 | (buffer[106] & 0xFF) << 16 | (buffer[107] & 0xFF) << 24;
113 A1R5G5B5 = ((1 << 16) | 2),
114 X1R5G5B5 = ((2 << 16) | 2),
115 A4R4G4B4 = ((3 << 16) | 2),
116 X4R4G4B4 = ((4 << 16) | 2),
117 R5G6B5 = ((5 << 16) | 2),
118 R8G8B8 = ((1 << 16) | 3),
119 A8B8G8R8 = ((1 << 16) | 4),
120 X8B8G8R8 = ((2 << 16) | 4),
121 A8R8G8B8 = ((3 << 16) | 4),
122 X8R8G8B8 = ((4 << 16) | 4)
126 constexpr uint A1R5G5B5_MASKS[] = { 0x7C00, 0x03E0, 0x001F, 0x8000 };
127 constexpr uint X1R5G5B5_MASKS[] = { 0x7C00, 0x03E0, 0x001F, 0x0000 };
128 constexpr uint A4R4G4B4_MASKS[] = { 0x0F00, 0x00F0, 0x000F, 0xF000 };
129 constexpr uint X4R4G4B4_MASKS[] = { 0x0F00, 0x00F0, 0x000F, 0x0000 };
130 constexpr uint R5G6B5_MASKS[] = { 0xF800, 0x07E0, 0x001F, 0x0000 };
131 constexpr uint R8G8B8_MASKS[] = { 0xFF0000, 0x00FF00, 0x0000FF, 0x000000 };
132 constexpr uint A8B8G8R8_MASKS[] = { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 };
133 constexpr uint X8B8G8R8_MASKS[] = { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 };
134 constexpr uint A8R8G8B8_MASKS[] = { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 };
135 constexpr uint X8R8G8B8_MASKS[] = { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 };
137 // BIT4 = 17 * index;
138 constexpr uint BIT5[] = { 0, 8, 16, 25, 33, 41, 49, 58, 66, 74, 82, 90, 99, 107, 115, 123, 132, 140, 148, 156, 165, 173, 181, 189, 197, 206, 214, 222, 230, 239, 247, 255 };
139 constexpr uint BIT6[] = { 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 130, 134, 138, 142, 146, 150, 154, 158, 162, 166, 170, 174, 178, 182, 186, 190, 194, 198, 202, 206, 210, 215, 219, 223, 227, 231, 235, 239, 243, 247, 251, 255 };
141 uint ddsGetType(const unsigned char *buffer) {
143 uint flags = ddsGetPixelFormatFlags(buffer);
144 if ((flags & 0x04) != 0) {
146 type = ddsGetFourCC(buffer);
148 else if ((flags & 0x40) != 0) {
150 uint bitCount = ddsGetBitCount(buffer);
151 uint redMask = ddsGetRedMask(buffer);
152 uint greenMask = ddsGetGreenMask(buffer);
153 uint blueMask = ddsGetBlueMask(buffer);
154 uint alphaMask = ((flags & 0x01) != 0) ? ddsGetAlphaMask(buffer) : 0; // 0x01 alpha
155 if (bitCount == 16) {
156 if (redMask == A1R5G5B5_MASKS[0] && greenMask == A1R5G5B5_MASKS[1] && blueMask == A1R5G5B5_MASKS[2] && alphaMask == A1R5G5B5_MASKS[3]) {
160 else if (redMask == X1R5G5B5_MASKS[0] && greenMask == X1R5G5B5_MASKS[1] && blueMask == X1R5G5B5_MASKS[2] && alphaMask == X1R5G5B5_MASKS[3]) {
164 else if (redMask == A4R4G4B4_MASKS[0] && greenMask == A4R4G4B4_MASKS[1] && blueMask == A4R4G4B4_MASKS[2] && alphaMask == A4R4G4B4_MASKS[3]) {
168 else if (redMask == X4R4G4B4_MASKS[0] && greenMask == X4R4G4B4_MASKS[1] && blueMask == X4R4G4B4_MASKS[2] && alphaMask == X4R4G4B4_MASKS[3]) {
172 else if (redMask == R5G6B5_MASKS[0] && greenMask == R5G6B5_MASKS[1] && blueMask == R5G6B5_MASKS[2] && alphaMask == R5G6B5_MASKS[3]) {
177 // Unsupported 16bit RGB image
180 else if (bitCount == 24) {
181 if (redMask == R8G8B8_MASKS[0] && greenMask == R8G8B8_MASKS[1] && blueMask == R8G8B8_MASKS[2] && alphaMask == R8G8B8_MASKS[3]) {
186 // Unsupported 24bit RGB image
189 else if (bitCount == 32) {
190 if (redMask == A8B8G8R8_MASKS[0] && greenMask == A8B8G8R8_MASKS[1] && blueMask == A8B8G8R8_MASKS[2] && alphaMask == A8B8G8R8_MASKS[3]) {
194 else if (redMask == X8B8G8R8_MASKS[0] && greenMask == X8B8G8R8_MASKS[1] && blueMask == X8B8G8R8_MASKS[2] && alphaMask == X8B8G8R8_MASKS[3]) {
198 else if (redMask == A8R8G8B8_MASKS[0] && greenMask == A8R8G8B8_MASKS[1] && blueMask == A8R8G8B8_MASKS[2] && alphaMask == A8R8G8B8_MASKS[3]) {
202 else if (redMask == X8R8G8B8_MASKS[0] && greenMask == X8R8G8B8_MASKS[1] && blueMask == X8R8G8B8_MASKS[2] && alphaMask == X8R8G8B8_MASKS[3]) {
207 // Unsupported 32bit RGB image
212 // YUV or LUMINANCE image
217 uint ddsGetDXTColor2_1(uint c0, uint c1, uint a) {
219 uint r = (2 * BIT5[(c0 & 0xFC00) >> 11] + BIT5[(c1 & 0xFC00) >> 11]) / 3;
220 uint g = (2 * BIT6[(c0 & 0x07E0) >> 5] + BIT6[(c1 & 0x07E0) >> 5]) / 3;
221 uint b = (2 * BIT5[c0 & 0x001F] + BIT5[c1 & 0x001F]) / 3;
222 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
225 uint ddsGetDXTColor1_1(uint c0, uint c1, uint a) {
227 uint r = (BIT5[(c0 & 0xFC00) >> 11] + BIT5[(c1 & 0xFC00) >> 11]) / 2;
228 uint g = (BIT6[(c0 & 0x07E0) >> 5] + BIT6[(c1 & 0x07E0) >> 5]) / 2;
229 uint b = (BIT5[c0 & 0x001F] + BIT5[c1 & 0x001F]) / 2;
230 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
233 uint ddsGetDXTColor1(uint c, uint a) {
234 uint r = BIT5[(c & 0xFC00) >> 11];
235 uint g = BIT6[(c & 0x07E0) >> 5];
236 uint b = BIT5[(c & 0x001F)];
237 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
240 uint ddsGetDXTColor(uint c0, uint c1, uint a, uint t) {
242 case 0: return ddsGetDXTColor1(c0, a);
243 case 1: return ddsGetDXTColor1(c1, a);
244 case 2: return (c0 > c1) ? ddsGetDXTColor2_1(c0, c1, a) : ddsGetDXTColor1_1(c0, c1, a);
245 case 3: return (c0 > c1) ? ddsGetDXTColor2_1(c1, c0, a) : 0;
252 guchar *ddsDecodeDXT1(uint width, uint height, const unsigned char *buffer) {
253 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
254 if (pixels == nullptr) return nullptr;
256 uint w = (width + 3) / 4;
257 uint h = (height + 3) / 4;
258 for (uint i = 0; i<h; i++) {
259 for (uint j = 0; j<w; j++) {
260 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
261 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
262 for (uint k = 0; k<4; k++) {
263 if (4 * i + k >= height) break;
264 uint t0 = (buffer[index] & 0x03);
265 uint t1 = (buffer[index] & 0x0C) >> 2;
266 uint t2 = (buffer[index] & 0x30) >> 4;
267 uint t3 = (buffer[index++] & 0xC0) >> 6;
268 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, 0xFF, t0);
269 if (4 * j + 1 >= width) continue;
270 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, 0xFF, t1);
271 if (4 * j + 2 >= width) continue;
272 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, 0xFF, t2);
273 if (4 * j + 3 >= width) continue;
274 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, 0xFF, t3);
278 return reinterpret_cast<guchar *>(pixels);
281 guchar *ddsDecodeDXT3(uint width, uint height, const unsigned char *buffer) {
282 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
283 if (pixels == nullptr) return nullptr;
285 uint w = (width + 3) / 4;
286 uint h = (height + 3) / 4;
288 for (uint i = 0; i<h; i++) {
289 for (uint j = 0; j<w; j++) {
290 // create alpha table(4bit to 8bit)
291 for (uint k = 0; k<4; k++) {
292 uint a0 = (buffer[index++] & 0xFF);
293 uint a1 = (buffer[index++] & 0xFF);
294 // 4bit alpha to 8bit alpha
295 alphaTable[4 * k + 0] = 17 * ((a0 & 0xF0) >> 4);
296 alphaTable[4 * k + 1] = 17 * (a0 & 0x0F);
297 alphaTable[4 * k + 2] = 17 * ((a1 & 0xF0) >> 4);
298 alphaTable[4 * k + 3] = 17 * (a1 & 0x0F);
300 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
301 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
302 for (uint k = 0; k<4; k++) {
303 if (4 * i + k >= height) break;
304 uint t0 = (buffer[index] & 0x03);
305 uint t1 = (buffer[index] & 0x0C) >> 2;
306 uint t2 = (buffer[index] & 0x30) >> 4;
307 uint t3 = (buffer[index++] & 0xC0) >> 6;
308 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 0], t0);
309 if (4 * j + 1 >= width) continue;
310 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 1], t1);
311 if (4 * j + 2 >= width) continue;
312 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 2], t2);
313 if (4 * j + 3 >= width) continue;
314 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 3], t3);
318 return reinterpret_cast<guchar *>(pixels);
321 guchar *ddsDecodeDXT2(uint width, uint height, const unsigned char *buffer) {
322 return ddsDecodeDXT3(width, height, buffer);
325 int ddsGetDXT5Alpha(uint a0, uint a1, uint t) {
326 if (a0 > a1) switch (t) {
329 case 2: return (6 * a0 + a1) / 7;
330 case 3: return (5 * a0 + 2 * a1) / 7;
331 case 4: return (4 * a0 + 3 * a1) / 7;
332 case 5: return (3 * a0 + 4 * a1) / 7;
333 case 6: return (2 * a0 + 5 * a1) / 7;
334 case 7: return (a0 + 6 * a1) / 7;
341 case 2: return (4 * a0 + a1) / 5;
342 case 3: return (3 * a0 + 2 * a1) / 5;
343 case 4: return (2 * a0 + 3 * a1) / 5;
344 case 5: return (a0 + 4 * a1) / 5;
353 guchar *ddsDecodeDXT5(uint width, uint height, const unsigned char *buffer) {
354 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
355 if (pixels == nullptr) return nullptr;
357 uint w = (width + 3) / 4;
358 uint h = (height + 3) / 4;
360 for (uint i = 0; i<h; i++) {
361 for (uint j = 0; j<w; j++) {
362 // create alpha table
363 uint a0 = (buffer[index++] & 0xFF);
364 uint a1 = (buffer[index++] & 0xFF);
365 uint b0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8 | (buffer[index + 2] & 0xFF) << 16; index += 3;
366 uint b1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8 | (buffer[index + 2] & 0xFF) << 16; index += 3;
367 alphaTable[0] = b0 & 0x07;
368 alphaTable[1] = (b0 >> 3) & 0x07;
369 alphaTable[2] = (b0 >> 6) & 0x07;
370 alphaTable[3] = (b0 >> 9) & 0x07;
371 alphaTable[4] = (b0 >> 12) & 0x07;
372 alphaTable[5] = (b0 >> 15) & 0x07;
373 alphaTable[6] = (b0 >> 18) & 0x07;
374 alphaTable[7] = (b0 >> 21) & 0x07;
375 alphaTable[8] = b1 & 0x07;
376 alphaTable[9] = (b1 >> 3) & 0x07;
377 alphaTable[10] = (b1 >> 6) & 0x07;
378 alphaTable[11] = (b1 >> 9) & 0x07;
379 alphaTable[12] = (b1 >> 12) & 0x07;
380 alphaTable[13] = (b1 >> 15) & 0x07;
381 alphaTable[14] = (b1 >> 18) & 0x07;
382 alphaTable[15] = (b1 >> 21) & 0x07;
383 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
384 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
385 for (uint k = 0; k<4; k++) {
386 if (4 * i + k >= height) break;
387 uint t0 = (buffer[index] & 0x03);
388 uint t1 = (buffer[index] & 0x0C) >> 2;
389 uint t2 = (buffer[index] & 0x30) >> 4;
390 uint t3 = (buffer[index++] & 0xC0) >> 6;
391 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 0]), t0);
392 if (4 * j + 1 >= width) continue;
393 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 1]), t1);
394 if (4 * j + 2 >= width) continue;
395 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 2]), t2);
396 if (4 * j + 3 >= width) continue;
397 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 3]), t3);
401 return reinterpret_cast<guchar *>(pixels);
404 guchar *ddsDecodeDXT4(uint width, uint height, const unsigned char *buffer) {
405 return ddsDecodeDXT5(width, height, buffer);
408 guchar *ddsReadA1R5G5B5(uint width, uint height, const unsigned char *buffer) {
409 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
410 if (pixels == nullptr) return nullptr;
412 for (uint i = 0; i<height*width; i++) {
413 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
414 uint r = BIT5[(rgba & A1R5G5B5_MASKS[0]) >> 10];
415 uint g = BIT5[(rgba & A1R5G5B5_MASKS[1]) >> 5];
416 uint b = BIT5[(rgba & A1R5G5B5_MASKS[2])];
417 uint a = 255 * ((rgba & A1R5G5B5_MASKS[3]) >> 15);
418 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
420 return reinterpret_cast<guchar *>(pixels);
423 guchar *ddsReadX1R5G5B5(uint width, uint height, const unsigned char *buffer) {
424 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
425 if (pixels == nullptr) return nullptr;
427 for (uint i = 0; i<height*width; i++) {
428 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
429 uint r = BIT5[(rgba & X1R5G5B5_MASKS[0]) >> 10];
430 uint g = BIT5[(rgba & X1R5G5B5_MASKS[1]) >> 5];
431 uint b = BIT5[(rgba & X1R5G5B5_MASKS[2])];
433 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
435 return reinterpret_cast<guchar *>(pixels);
438 guchar *ddsReadA4R4G4B4(uint width, uint height, const unsigned char *buffer) {
439 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
440 if (pixels == nullptr) return nullptr;
442 for (uint i = 0; i<height*width; i++) {
443 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
444 uint r = 17 * ((rgba & A4R4G4B4_MASKS[0]) >> 8);
445 uint g = 17 * ((rgba & A4R4G4B4_MASKS[1]) >> 4);
446 uint b = 17 * ((rgba & A4R4G4B4_MASKS[2]));
447 uint a = 17 * ((rgba & A4R4G4B4_MASKS[3]) >> 12);
448 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
450 return reinterpret_cast<guchar *>(pixels);
453 guchar *ddsReadX4R4G4B4(uint width, uint height, const unsigned char *buffer) {
454 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
455 if (pixels == nullptr) return nullptr;
457 for (uint i = 0; i<height*width; i++) {
458 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
459 uint r = 17 * ((rgba & A4R4G4B4_MASKS[0]) >> 8);
460 uint g = 17 * ((rgba & A4R4G4B4_MASKS[1]) >> 4);
461 uint b = 17 * ((rgba & A4R4G4B4_MASKS[2]));
463 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
465 return reinterpret_cast<guchar *>(pixels);
468 guchar *ddsReadR5G6B5(uint width, uint height, const unsigned char *buffer) {
469 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
470 if (pixels == nullptr) return nullptr;
472 for (uint i = 0; i<height*width; i++) {
473 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
474 uint r = BIT5[((rgba & R5G6B5_MASKS[0]) >> 11)];
475 uint g = BIT6[((rgba & R5G6B5_MASKS[1]) >> 5)];
476 uint b = BIT5[((rgba & R5G6B5_MASKS[2]))];
478 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
480 return reinterpret_cast<guchar *>(pixels);
483 guchar *ddsReadR8G8B8(uint width, uint height, const unsigned char *buffer) {
484 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
485 if (pixels == nullptr) return nullptr;
487 for (uint i = 0; i<height*width; i++) {
488 uint b = buffer[index++] & 0xFF;
489 uint g = buffer[index++] & 0xFF;
490 uint r = buffer[index++] & 0xFF;
492 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
494 return reinterpret_cast<guchar *>(pixels);
497 guchar *ddsReadA8B8G8R8(uint width, uint height, const unsigned char *buffer) {
498 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
499 if (pixels == nullptr) return nullptr;
501 for (uint i = 0; i<height*width; i++) {
502 uint r = buffer[index++] & 0xFF;
503 uint g = buffer[index++] & 0xFF;
504 uint b = buffer[index++] & 0xFF;
505 uint a = buffer[index++] & 0xFF;
506 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
508 return reinterpret_cast<guchar *>(pixels);
511 guchar *ddsReadX8B8G8R8(uint width, uint height, const unsigned char *buffer) {
512 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
513 if (pixels == nullptr) return nullptr;
515 for (uint i = 0; i<height*width; i++) {
516 uint r = buffer[index++] & 0xFF;
517 uint g = buffer[index++] & 0xFF;
518 uint b = buffer[index++] & 0xFF;
519 uint a = 255; index++;
520 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
522 return reinterpret_cast<guchar *>(pixels);
525 guchar *ddsReadA8R8G8B8(uint width, uint height, const unsigned char *buffer) {
526 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
527 if (pixels == nullptr) return nullptr;
529 for (uint i = 0; i<height*width; i++) {
530 uint b = buffer[index++] & 0xFF;
531 uint g = buffer[index++] & 0xFF;
532 uint r = buffer[index++] & 0xFF;
533 uint a = buffer[index++] & 0xFF;
534 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
536 return reinterpret_cast<guchar *>(pixels);
539 guchar *ddsReadX8R8G8B8(uint width, uint height, const unsigned char *buffer) {
540 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
541 if (pixels == nullptr) return nullptr;
543 for (uint i = 0; i<height*width; i++) {
544 uint b = buffer[index++] & 0xFF;
545 uint g = buffer[index++] & 0xFF;
546 uint r = buffer[index++] & 0xFF;
547 uint a = 255; index++;
548 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
550 return reinterpret_cast<guchar *>(pixels);
553 gboolean ImageLoaderDDS::write(const guchar *buf, gsize &chunk_size, gsize count, GError **)
555 uint width = ddsGetWidth(buf);
556 uint height = ddsGetHeight(buf);
557 uint type = ddsGetType(buf);
558 if (type == 0) return FALSE;
560 guchar *pixels = nullptr;
561 guint rowstride = width * 4;
563 case DXT1: pixels = ddsDecodeDXT1(width, height, buf); break;
564 case DXT2: pixels = ddsDecodeDXT2(width, height, buf); break;
565 case DXT3: pixels = ddsDecodeDXT3(width, height, buf); break;
566 case DXT4: pixels = ddsDecodeDXT4(width, height, buf); break;
567 case DXT5: pixels = ddsDecodeDXT5(width, height, buf); break;
568 case A1R5G5B5: pixels = ddsReadA1R5G5B5(width, height, buf); break;
569 case X1R5G5B5: pixels = ddsReadX1R5G5B5(width, height, buf); break;
570 case A4R4G4B4: pixels = ddsReadA4R4G4B4(width, height, buf); break;
571 case X4R4G4B4: pixels = ddsReadX4R4G4B4(width, height, buf); break;
572 case R5G6B5: pixels = ddsReadR5G6B5(width, height, buf); break;
573 case R8G8B8: pixels = ddsReadR8G8B8(width, height, buf); break;
574 case A8B8G8R8: pixels = ddsReadA8B8G8R8(width, height, buf); break;
575 case X8B8G8R8: pixels = ddsReadX8B8G8R8(width, height, buf); break;
576 case A8R8G8B8: pixels = ddsReadA8R8G8B8(width, height, buf); break;
577 case X8R8G8B8: pixels = ddsReadX8R8G8B8(width, height, buf); break;
581 pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8, width, height, rowstride, free_buffer, nullptr);
582 area_updated_cb(nullptr, 0, 0, width, height, data);
588 void ImageLoaderDDS::init(AreaUpdatedCb area_updated_cb, SizePreparedCb, AreaPreparedCb, gpointer data)
590 this->area_updated_cb = area_updated_cb;
594 GdkPixbuf *ImageLoaderDDS::get_pixbuf()
599 gchar *ImageLoaderDDS::get_format_name()
601 return g_strdup("dds");
604 gchar **ImageLoaderDDS::get_format_mime_types()
606 static const gchar *mime[] = {"image/vnd-ms.dds", nullptr};
607 return g_strdupv(const_cast<gchar **>(mime));
610 ImageLoaderDDS::~ImageLoaderDDS()
612 if (pixbuf) g_object_unref(pixbuf);
617 std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_dds()
619 return std::make_unique<ImageLoaderDDS>();
622 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */