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
29 #include "image-load.h"
30 #include "image-load-dds.h"
32 struct ImageLoaderDDS {
33 ImageLoaderBackendCbAreaUpdated area_updated_cb;
34 ImageLoaderBackendCbSize size_cb;
35 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
38 guint requested_width;
39 guint requested_height;
43 static void free_buffer(guchar *pixels, gpointer)
48 uint ddsGetHeight(unsigned const char * buffer) {
49 return (buffer[12] & 0xFF) | (buffer[13] & 0xFF) << 8 | (buffer[14] & 0xFF) << 16 | (buffer[15] & 0xFF) << 24;
52 uint ddsGetWidth(unsigned const char * buffer) {
53 return (buffer[16] & 0xFF) | (buffer[17] & 0xFF) << 8 | (buffer[18] & 0xFF) << 16 | (buffer[19] & 0xFF) << 24;
56 #pragma GCC diagnostic push
57 #pragma GCC diagnostic ignored "-Wunused-function"
58 uint ddsGetMipmap_unused(unsigned const char * buffer) {
59 return (buffer[28] & 0xFF) | (buffer[29] & 0xFF) << 8 | (buffer[30] & 0xFF) << 16 | (buffer[31] & 0xFF) << 24;
61 #pragma GCC diagnostic pop
63 uint ddsGetPixelFormatFlags(unsigned const char * buffer) {
64 return (buffer[80] & 0xFF) | (buffer[81] & 0xFF) << 8 | (buffer[82] & 0xFF) << 16 | (buffer[83] & 0xFF) << 24;
67 uint ddsGetFourCC(unsigned const char * buffer) {
68 return (buffer[84] & 0xFF) << 24 | (buffer[85] & 0xFF) << 16 | (buffer[86] & 0xFF) << 8 | (buffer[87] & 0xFF);
71 uint ddsGetBitCount(unsigned const char * buffer) {
72 return (buffer[88] & 0xFF) | (buffer[89] & 0xFF) << 8 | (buffer[90] & 0xFF) << 16 | (buffer[91] & 0xFF) << 24;
75 uint ddsGetRedMask(unsigned const char * buffer) {
76 return (buffer[92] & 0xFF) | (buffer[93] & 0xFF) << 8 | (buffer[94] & 0xFF) << 16 | (buffer[95] & 0xFF) << 24;
79 uint ddsGetGreenMask(unsigned const char * buffer) {
80 return (buffer[96] & 0xFF) | (buffer[97] & 0xFF) << 8 | (buffer[98] & 0xFF) << 16 | (buffer[99] & 0xFF) << 24;
83 uint ddsGetBlueMask(unsigned const char * buffer) {
84 return (buffer[100] & 0xFF) | (buffer[101] & 0xFF) << 8 | (buffer[102] & 0xFF) << 16 | (buffer[103] & 0xFF) << 24;
87 uint ddsGetAlphaMask(unsigned const char * buffer) {
88 return (buffer[104] & 0xFF) | (buffer[105] & 0xFF) << 8 | (buffer[106] & 0xFF) << 16 | (buffer[107] & 0xFF) << 24;
92 #define DXT1 (0x44585431)
93 #define DXT2 (0x44585432)
94 #define DXT3 (0x44585433)
95 #define DXT4 (0x44585434)
96 #define DXT5 (0x44585435)
97 #define A1R5G5B5 ((1 << 16) | 2)
98 #define X1R5G5B5 ((2 << 16) | 2)
99 #define A4R4G4B4 ((3 << 16) | 2)
100 #define X4R4G4B4 ((4 << 16) | 2)
101 #define R5G6B5 ((5 << 16) | 2)
102 #define R8G8B8 ((1 << 16) | 3)
103 #define A8B8G8R8 ((1 << 16) | 4)
104 #define X8B8G8R8 ((2 << 16) | 4)
105 #define A8R8G8B8 ((3 << 16) | 4)
106 #define X8R8G8B8 ((4 << 16) | 4)
109 static const uint A1R5G5B5_MASKS[] = { 0x7C00, 0x03E0, 0x001F, 0x8000 };
110 static const uint X1R5G5B5_MASKS[] = { 0x7C00, 0x03E0, 0x001F, 0x0000 };
111 static const uint A4R4G4B4_MASKS[] = { 0x0F00, 0x00F0, 0x000F, 0xF000 };
112 static const uint X4R4G4B4_MASKS[] = { 0x0F00, 0x00F0, 0x000F, 0x0000 };
113 static const uint R5G6B5_MASKS[] = { 0xF800, 0x07E0, 0x001F, 0x0000 };
114 static const uint R8G8B8_MASKS[] = { 0xFF0000, 0x00FF00, 0x0000FF, 0x000000 };
115 static const uint A8B8G8R8_MASKS[] = { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 };
116 static const uint X8B8G8R8_MASKS[] = { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 };
117 static const uint A8R8G8B8_MASKS[] = { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 };
118 static const uint X8R8G8B8_MASKS[] = { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 };
120 // BIT4 = 17 * index;
121 static const 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 };
122 static const 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 };
124 static uint ddsGetType(const unsigned char *buffer) {
126 uint flags = ddsGetPixelFormatFlags(buffer);
127 if ((flags & 0x04) != 0) {
129 type = ddsGetFourCC(buffer);
131 else if ((flags & 0x40) != 0) {
133 uint bitCount = ddsGetBitCount(buffer);
134 uint redMask = ddsGetRedMask(buffer);
135 uint greenMask = ddsGetGreenMask(buffer);
136 uint blueMask = ddsGetBlueMask(buffer);
137 uint alphaMask = ((flags & 0x01) != 0) ? ddsGetAlphaMask(buffer) : 0; // 0x01 alpha
138 if (bitCount == 16) {
139 if (redMask == A1R5G5B5_MASKS[0] && greenMask == A1R5G5B5_MASKS[1] && blueMask == A1R5G5B5_MASKS[2] && alphaMask == A1R5G5B5_MASKS[3]) {
143 else if (redMask == X1R5G5B5_MASKS[0] && greenMask == X1R5G5B5_MASKS[1] && blueMask == X1R5G5B5_MASKS[2] && alphaMask == X1R5G5B5_MASKS[3]) {
147 else if (redMask == A4R4G4B4_MASKS[0] && greenMask == A4R4G4B4_MASKS[1] && blueMask == A4R4G4B4_MASKS[2] && alphaMask == A4R4G4B4_MASKS[3]) {
151 else if (redMask == X4R4G4B4_MASKS[0] && greenMask == X4R4G4B4_MASKS[1] && blueMask == X4R4G4B4_MASKS[2] && alphaMask == X4R4G4B4_MASKS[3]) {
155 else if (redMask == R5G6B5_MASKS[0] && greenMask == R5G6B5_MASKS[1] && blueMask == R5G6B5_MASKS[2] && alphaMask == R5G6B5_MASKS[3]) {
160 // Unsupported 16bit RGB image
163 else if (bitCount == 24) {
164 if (redMask == R8G8B8_MASKS[0] && greenMask == R8G8B8_MASKS[1] && blueMask == R8G8B8_MASKS[2] && alphaMask == R8G8B8_MASKS[3]) {
169 // Unsupported 24bit RGB image
172 else if (bitCount == 32) {
173 if (redMask == A8B8G8R8_MASKS[0] && greenMask == A8B8G8R8_MASKS[1] && blueMask == A8B8G8R8_MASKS[2] && alphaMask == A8B8G8R8_MASKS[3]) {
177 else if (redMask == X8B8G8R8_MASKS[0] && greenMask == X8B8G8R8_MASKS[1] && blueMask == X8B8G8R8_MASKS[2] && alphaMask == X8B8G8R8_MASKS[3]) {
181 else if (redMask == A8R8G8B8_MASKS[0] && greenMask == A8R8G8B8_MASKS[1] && blueMask == A8R8G8B8_MASKS[2] && alphaMask == A8R8G8B8_MASKS[3]) {
185 else if (redMask == X8R8G8B8_MASKS[0] && greenMask == X8R8G8B8_MASKS[1] && blueMask == X8R8G8B8_MASKS[2] && alphaMask == X8R8G8B8_MASKS[3]) {
190 // Unsupported 32bit RGB image
195 // YUV or LUMINANCE image
200 uint ddsGetDXTColor2_1(uint c0, uint c1, uint a) {
202 uint r = (2 * BIT5[(c0 & 0xFC00) >> 11] + BIT5[(c1 & 0xFC00) >> 11]) / 3;
203 uint g = (2 * BIT6[(c0 & 0x07E0) >> 5] + BIT6[(c1 & 0x07E0) >> 5]) / 3;
204 uint b = (2 * BIT5[c0 & 0x001F] + BIT5[c1 & 0x001F]) / 3;
205 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
208 uint ddsGetDXTColor1_1(uint c0, uint c1, uint a) {
210 uint r = (BIT5[(c0 & 0xFC00) >> 11] + BIT5[(c1 & 0xFC00) >> 11]) / 2;
211 uint g = (BIT6[(c0 & 0x07E0) >> 5] + BIT6[(c1 & 0x07E0) >> 5]) / 2;
212 uint b = (BIT5[c0 & 0x001F] + BIT5[c1 & 0x001F]) / 2;
213 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
216 uint ddsGetDXTColor1(uint c, uint a) {
217 uint r = BIT5[(c & 0xFC00) >> 11];
218 uint g = BIT6[(c & 0x07E0) >> 5];
219 uint b = BIT5[(c & 0x001F)];
220 return (a << 24) | (r << 0) | (g << 8) | (b << 16);
223 uint ddsGetDXTColor(uint c0, uint c1, uint a, uint t) {
225 case 0: return ddsGetDXTColor1(c0, a);
226 case 1: return ddsGetDXTColor1(c1, a);
227 case 2: return (c0 > c1) ? ddsGetDXTColor2_1(c0, c1, a) : ddsGetDXTColor1_1(c0, c1, a);
228 case 3: return (c0 > c1) ? ddsGetDXTColor2_1(c1, c0, a) : 0;
233 guchar *ddsDecodeDXT1(uint width, uint height, const unsigned char *buffer) {
234 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
235 if (pixels == nullptr) return nullptr;
237 uint w = (width + 3) / 4;
238 uint h = (height + 3) / 4;
239 for (uint i = 0; i<h; i++) {
240 for (uint j = 0; j<w; j++) {
241 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
242 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
243 for (uint k = 0; k<4; k++) {
244 if (4 * i + k >= height) break;
245 uint t0 = (buffer[index] & 0x03);
246 uint t1 = (buffer[index] & 0x0C) >> 2;
247 uint t2 = (buffer[index] & 0x30) >> 4;
248 uint t3 = (buffer[index++] & 0xC0) >> 6;
249 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, 0xFF, t0);
250 if (4 * j + 1 >= width) continue;
251 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, 0xFF, t1);
252 if (4 * j + 2 >= width) continue;
253 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, 0xFF, t2);
254 if (4 * j + 3 >= width) continue;
255 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, 0xFF, t3);
259 return reinterpret_cast<guchar *>(pixels);
262 guchar *ddsDecodeDXT3(uint width, uint height, const unsigned char *buffer) {
263 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
264 if (pixels == nullptr) return nullptr;
266 uint w = (width + 3) / 4;
267 uint h = (height + 3) / 4;
269 for (uint i = 0; i<h; i++) {
270 for (uint j = 0; j<w; j++) {
271 // create alpha table(4bit to 8bit)
272 for (uint k = 0; k<4; k++) {
273 uint a0 = (buffer[index++] & 0xFF);
274 uint a1 = (buffer[index++] & 0xFF);
275 // 4bit alpha to 8bit alpha
276 alphaTable[4 * k + 0] = 17 * ((a0 & 0xF0) >> 4);
277 alphaTable[4 * k + 1] = 17 * (a0 & 0x0F);
278 alphaTable[4 * k + 2] = 17 * ((a1 & 0xF0) >> 4);
279 alphaTable[4 * k + 3] = 17 * (a1 & 0x0F);
281 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
282 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
283 for (uint k = 0; k<4; k++) {
284 if (4 * i + k >= height) break;
285 uint t0 = (buffer[index] & 0x03);
286 uint t1 = (buffer[index] & 0x0C) >> 2;
287 uint t2 = (buffer[index] & 0x30) >> 4;
288 uint t3 = (buffer[index++] & 0xC0) >> 6;
289 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 0], t0);
290 if (4 * j + 1 >= width) continue;
291 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 1], t1);
292 if (4 * j + 2 >= width) continue;
293 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 2], t2);
294 if (4 * j + 3 >= width) continue;
295 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, alphaTable[4 * k + 3], t3);
299 return reinterpret_cast<guchar *>(pixels);
302 guchar *ddsDecodeDXT2(uint width, uint height, const unsigned char *buffer) {
303 return ddsDecodeDXT3(width, height, buffer);
306 int ddsGetDXT5Alpha(uint a0, uint a1, uint t) {
307 if (a0 > a1) switch (t) {
310 case 2: return (6 * a0 + a1) / 7;
311 case 3: return (5 * a0 + 2 * a1) / 7;
312 case 4: return (4 * a0 + 3 * a1) / 7;
313 case 5: return (3 * a0 + 4 * a1) / 7;
314 case 6: return (2 * a0 + 5 * a1) / 7;
315 case 7: return (a0 + 6 * a1) / 7;
320 case 2: return (4 * a0 + a1) / 5;
321 case 3: return (3 * a0 + 2 * a1) / 5;
322 case 4: return (2 * a0 + 3 * a1) / 5;
323 case 5: return (a0 + 4 * a1) / 5;
330 guchar *ddsDecodeDXT5(uint width, uint height, const unsigned char *buffer) {
331 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
332 if (pixels == nullptr) return nullptr;
334 uint w = (width + 3) / 4;
335 uint h = (height + 3) / 4;
337 for (uint i = 0; i<h; i++) {
338 for (uint j = 0; j<w; j++) {
339 // create alpha table
340 uint a0 = (buffer[index++] & 0xFF);
341 uint a1 = (buffer[index++] & 0xFF);
342 uint b0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8 | (buffer[index + 2] & 0xFF) << 16; index += 3;
343 uint b1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8 | (buffer[index + 2] & 0xFF) << 16; index += 3;
344 alphaTable[0] = b0 & 0x07;
345 alphaTable[1] = (b0 >> 3) & 0x07;
346 alphaTable[2] = (b0 >> 6) & 0x07;
347 alphaTable[3] = (b0 >> 9) & 0x07;
348 alphaTable[4] = (b0 >> 12) & 0x07;
349 alphaTable[5] = (b0 >> 15) & 0x07;
350 alphaTable[6] = (b0 >> 18) & 0x07;
351 alphaTable[7] = (b0 >> 21) & 0x07;
352 alphaTable[8] = b1 & 0x07;
353 alphaTable[9] = (b1 >> 3) & 0x07;
354 alphaTable[10] = (b1 >> 6) & 0x07;
355 alphaTable[11] = (b1 >> 9) & 0x07;
356 alphaTable[12] = (b1 >> 12) & 0x07;
357 alphaTable[13] = (b1 >> 15) & 0x07;
358 alphaTable[14] = (b1 >> 18) & 0x07;
359 alphaTable[15] = (b1 >> 21) & 0x07;
360 uint c0 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
361 uint c1 = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
362 for (uint k = 0; k<4; k++) {
363 if (4 * i + k >= height) break;
364 uint t0 = (buffer[index] & 0x03);
365 uint t1 = (buffer[index] & 0x0C) >> 2;
366 uint t2 = (buffer[index] & 0x30) >> 4;
367 uint t3 = (buffer[index++] & 0xC0) >> 6;
368 pixels[4 * width*i + 4 * j + width*k + 0] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 0]), t0);
369 if (4 * j + 1 >= width) continue;
370 pixels[4 * width*i + 4 * j + width*k + 1] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 1]), t1);
371 if (4 * j + 2 >= width) continue;
372 pixels[4 * width*i + 4 * j + width*k + 2] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 2]), t2);
373 if (4 * j + 3 >= width) continue;
374 pixels[4 * width*i + 4 * j + width*k + 3] = ddsGetDXTColor(c0, c1, ddsGetDXT5Alpha(a0, a1, alphaTable[4 * k + 3]), t3);
378 return reinterpret_cast<guchar *>(pixels);
381 guchar *ddsDecodeDXT4(uint width, uint height, const unsigned char *buffer) {
382 return ddsDecodeDXT5(width, height, buffer);
385 guchar *ddsReadA1R5G5B5(uint width, uint height, const unsigned char *buffer) {
386 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
387 if (pixels == nullptr) return nullptr;
389 for (uint i = 0; i<height*width; i++) {
390 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
391 uint r = BIT5[(rgba & A1R5G5B5_MASKS[0]) >> 10];
392 uint g = BIT5[(rgba & A1R5G5B5_MASKS[1]) >> 5];
393 uint b = BIT5[(rgba & A1R5G5B5_MASKS[2])];
394 uint a = 255 * ((rgba & A1R5G5B5_MASKS[3]) >> 15);
395 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
397 return reinterpret_cast<guchar *>(pixels);
400 guchar *ddsReadX1R5G5B5(uint width, uint height, const unsigned char *buffer) {
401 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
402 if (pixels == nullptr) return nullptr;
404 for (uint i = 0; i<height*width; i++) {
405 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
406 uint r = BIT5[(rgba & X1R5G5B5_MASKS[0]) >> 10];
407 uint g = BIT5[(rgba & X1R5G5B5_MASKS[1]) >> 5];
408 uint b = BIT5[(rgba & X1R5G5B5_MASKS[2])];
410 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
412 return reinterpret_cast<guchar *>(pixels);
415 guchar *ddsReadA4R4G4B4(uint width, uint height, const unsigned char *buffer) {
416 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
417 if (pixels == nullptr) return nullptr;
419 for (uint i = 0; i<height*width; i++) {
420 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
421 uint r = 17 * ((rgba & A4R4G4B4_MASKS[0]) >> 8);
422 uint g = 17 * ((rgba & A4R4G4B4_MASKS[1]) >> 4);
423 uint b = 17 * ((rgba & A4R4G4B4_MASKS[2]));
424 uint a = 17 * ((rgba & A4R4G4B4_MASKS[3]) >> 12);
425 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
427 return reinterpret_cast<guchar *>(pixels);
430 guchar *ddsReadX4R4G4B4(uint width, uint height, const unsigned char *buffer) {
431 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
432 if (pixels == nullptr) return nullptr;
434 for (uint i = 0; i<height*width; i++) {
435 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
436 uint r = 17 * ((rgba & A4R4G4B4_MASKS[0]) >> 8);
437 uint g = 17 * ((rgba & A4R4G4B4_MASKS[1]) >> 4);
438 uint b = 17 * ((rgba & A4R4G4B4_MASKS[2]));
440 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
442 return reinterpret_cast<guchar *>(pixels);
445 guchar *ddsReadR5G6B5(uint width, uint height, const unsigned char *buffer) {
446 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
447 if (pixels == nullptr) return nullptr;
449 for (uint i = 0; i<height*width; i++) {
450 uint rgba = (buffer[index] & 0xFF) | (buffer[index + 1] & 0xFF) << 8; index += 2;
451 uint r = BIT5[((rgba & R5G6B5_MASKS[0]) >> 11)];
452 uint g = BIT6[((rgba & R5G6B5_MASKS[1]) >> 5)];
453 uint b = BIT5[((rgba & R5G6B5_MASKS[2]))];
455 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
457 return reinterpret_cast<guchar *>(pixels);
460 guchar *ddsReadR8G8B8(uint width, uint height, const unsigned char *buffer) {
461 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
462 if (pixels == nullptr) return nullptr;
464 for (uint i = 0; i<height*width; i++) {
465 uint b = buffer[index++] & 0xFF;
466 uint g = buffer[index++] & 0xFF;
467 uint r = buffer[index++] & 0xFF;
469 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
471 return reinterpret_cast<guchar *>(pixels);
474 guchar *ddsReadA8B8G8R8(uint width, uint height, const unsigned char *buffer) {
475 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
476 if (pixels == nullptr) return nullptr;
478 for (uint i = 0; i<height*width; i++) {
479 uint r = buffer[index++] & 0xFF;
480 uint g = buffer[index++] & 0xFF;
481 uint b = buffer[index++] & 0xFF;
482 uint a = buffer[index++] & 0xFF;
483 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
485 return reinterpret_cast<guchar *>(pixels);
488 guchar *ddsReadX8B8G8R8(uint width, uint height, const unsigned char *buffer) {
489 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
490 if (pixels == nullptr) return nullptr;
492 for (uint i = 0; i<height*width; i++) {
493 uint r = buffer[index++] & 0xFF;
494 uint g = buffer[index++] & 0xFF;
495 uint b = buffer[index++] & 0xFF;
496 uint a = 255; index++;
497 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
499 return reinterpret_cast<guchar *>(pixels);
502 guchar *ddsReadA8R8G8B8(uint width, uint height, const unsigned char *buffer) {
503 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
504 if (pixels == nullptr) return nullptr;
506 for (uint i = 0; i<height*width; i++) {
507 uint b = buffer[index++] & 0xFF;
508 uint g = buffer[index++] & 0xFF;
509 uint r = buffer[index++] & 0xFF;
510 uint a = buffer[index++] & 0xFF;
511 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
513 return reinterpret_cast<guchar *>(pixels);
516 guchar *ddsReadX8R8G8B8(uint width, uint height, const unsigned char *buffer) {
517 auto pixels = static_cast<uint *>(g_try_malloc(4 * width*height));
518 if (pixels == nullptr) return nullptr;
520 for (uint i = 0; i<height*width; i++) {
521 uint b = buffer[index++] & 0xFF;
522 uint g = buffer[index++] & 0xFF;
523 uint r = buffer[index++] & 0xFF;
524 uint a = 255; index++;
525 pixels[i] = (a << 24) | (r << 0) | (g << 8) | (b << 16);
527 return reinterpret_cast<guchar *>(pixels);
530 static gboolean image_loader_dds_load (gpointer loader, const guchar *buf, gsize, GError **)
532 auto ld = static_cast<ImageLoaderDDS *>(loader);
533 uint width = ddsGetWidth(buf);
534 uint height = ddsGetHeight(buf);
535 uint type = ddsGetType(buf);
536 if (type == 0) return FALSE;
538 guchar *pixels = nullptr;
539 guint rowstride = width * 4;
541 case DXT1: pixels = ddsDecodeDXT1(width, height, buf); break;
542 case DXT2: pixels = ddsDecodeDXT2(width, height, buf); break;
543 case DXT3: pixels = ddsDecodeDXT3(width, height, buf); break;
544 case DXT4: pixels = ddsDecodeDXT4(width, height, buf); break;
545 case DXT5: pixels = ddsDecodeDXT5(width, height, buf); break;
546 case A1R5G5B5: pixels = ddsReadA1R5G5B5(width, height, buf); break;
547 case X1R5G5B5: pixels = ddsReadX1R5G5B5(width, height, buf); break;
548 case A4R4G4B4: pixels = ddsReadA4R4G4B4(width, height, buf); break;
549 case X4R4G4B4: pixels = ddsReadX4R4G4B4(width, height, buf); break;
550 case R5G6B5: pixels = ddsReadR5G6B5(width, height, buf); break;
551 case R8G8B8: pixels = ddsReadR8G8B8(width, height, buf); break;
552 case A8B8G8R8: pixels = ddsReadA8B8G8R8(width, height, buf); break;
553 case X8B8G8R8: pixels = ddsReadX8B8G8R8(width, height, buf); break;
554 case A8R8G8B8: pixels = ddsReadA8R8G8B8(width, height, buf); break;
555 case X8R8G8B8: pixels = ddsReadX8R8G8B8(width, height, buf); break;
557 ld->pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8, width, height, rowstride, free_buffer, nullptr);
558 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
563 static gpointer image_loader_dds_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
565 auto loader = g_new0(ImageLoaderDDS, 1);
566 loader->area_updated_cb = area_updated_cb;
567 loader->size_cb = size_cb;
568 loader->area_prepared_cb = area_prepared_cb;
573 static void image_loader_dds_set_size(gpointer loader, int width, int height)
575 auto ld = static_cast<ImageLoaderDDS *>(loader);
576 ld->requested_width = width;
577 ld->requested_height = height;
580 static GdkPixbuf* image_loader_dds_get_pixbuf(gpointer loader)
582 auto ld = static_cast<ImageLoaderDDS *>(loader);
586 static gchar* image_loader_dds_get_format_name(gpointer)
588 return g_strdup("dds");
590 static gchar** image_loader_dds_get_format_mime_types(gpointer)
592 static const gchar *mime[] = {"image/vnd-ms.dds", nullptr};
593 return g_strdupv(const_cast<gchar **>(mime));
596 static gboolean image_loader_dds_close(gpointer, GError **)
601 static void image_loader_dds_abort(gpointer loader)
603 auto ld = static_cast<ImageLoaderDDS *>(loader);
607 static void image_loader_dds_free(gpointer loader)
609 auto ld = static_cast<ImageLoaderDDS *>(loader);
610 if (ld->pixbuf) g_object_unref(ld->pixbuf);
614 void image_loader_backend_set_dds(ImageLoaderBackend *funcs)
616 funcs->loader_new = image_loader_dds_new;
617 funcs->set_size = image_loader_dds_set_size;
618 funcs->load = image_loader_dds_load;
619 funcs->write = nullptr;
620 funcs->get_pixbuf = image_loader_dds_get_pixbuf;
621 funcs->close = image_loader_dds_close;
622 funcs->abort = image_loader_dds_abort;
623 funcs->free = image_loader_dds_free;
624 funcs->get_format_name = image_loader_dds_get_format_name;
625 funcs->get_format_mime_types = image_loader_dds_get_format_mime_types;
628 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */