2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write Microsoft Direct Draw Surface Image Format %
22 % Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization %
23 % dedicated to making software imaging solutions freely available. %
25 % You may not use this file except in compliance with the License. You may %
26 % obtain a copy of the License at %
28 % https://www.imagemagick.org/script/license.php %
30 % Unless required by applicable law or agreed to in writing, software %
31 % distributed under the License is distributed on an "AS IS" BASIS, %
32 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
33 % See the License for the specific language governing permissions and %
34 % limitations under the License. %
36 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
44 #include "MagickCore/studio.h"
45 #include "MagickCore/attribute.h"
46 #include "MagickCore/blob.h"
47 #include "MagickCore/blob-private.h"
48 #include "MagickCore/cache.h"
49 #include "MagickCore/colorspace.h"
50 #include "MagickCore/colorspace-private.h"
51 #include "MagickCore/exception.h"
52 #include "MagickCore/exception-private.h"
53 #include "MagickCore/image.h"
54 #include "MagickCore/image-private.h"
55 #include "MagickCore/list.h"
56 #include "MagickCore/log.h"
57 #include "MagickCore/magick.h"
58 #include "MagickCore/memory_.h"
59 #include "MagickCore/monitor.h"
60 #include "MagickCore/monitor-private.h"
61 #include "MagickCore/option.h"
62 #include "MagickCore/pixel-accessor.h"
63 #include "MagickCore/profile.h"
64 #include "MagickCore/quantum.h"
65 #include "MagickCore/quantum-private.h"
66 #include "MagickCore/resource_.h"
67 #include "MagickCore/static.h"
68 #include "MagickCore/string_.h"
69 #include "MagickCore/string-private.h"
70 #include "MagickCore/module.h"
71 #include "MagickCore/transform.h"
76 #define DDSD_CAPS 0x00000001
77 #define DDSD_HEIGHT 0x00000002
78 #define DDSD_WIDTH 0x00000004
79 #define DDSD_PITCH 0x00000008
80 #define DDSD_PIXELFORMAT 0x00001000
81 #define DDSD_MIPMAPCOUNT 0x00020000
82 #define DDSD_LINEARSIZE 0x00080000
83 #define DDSD_DEPTH 0x00800000
85 #define DDPF_ALPHAPIXELS 0x00000001
86 #define DDPF_FOURCC 0x00000004
87 #define DDPF_RGB 0x00000040
88 #define DDPF_LUMINANCE 0x00020000
90 #define FOURCC_DXT1 0x31545844
91 #define FOURCC_DXT3 0x33545844
92 #define FOURCC_DXT5 0x35545844
94 #define DDSCAPS_COMPLEX 0x00000008
95 #define DDSCAPS_TEXTURE 0x00001000
96 #define DDSCAPS_MIPMAP 0x00400000
98 #define DDSCAPS2_CUBEMAP 0x00000200
99 #define DDSCAPS2_CUBEMAP_POSITIVEX 0x00000400
100 #define DDSCAPS2_CUBEMAP_NEGATIVEX 0x00000800
101 #define DDSCAPS2_CUBEMAP_POSITIVEY 0x00001000
102 #define DDSCAPS2_CUBEMAP_NEGATIVEY 0x00002000
103 #define DDSCAPS2_CUBEMAP_POSITIVEZ 0x00004000
104 #define DDSCAPS2_CUBEMAP_NEGATIVEZ 0x00008000
105 #define DDSCAPS2_VOLUME 0x00200000
108 #define SIZE_MAX ((size_t) -1)
112 Structure declarations.
114 typedef struct _DDSPixelFormat
126 typedef struct _DDSInfo
142 typedef struct _DDSColors
151 typedef struct _DDSVector4
160 typedef struct _DDSVector3
168 typedef struct _DDSSourceBlock
176 typedef struct _DDSSingleColourLookup
178 DDSSourceBlock sources[2];
179 } DDSSingleColourLookup;
181 typedef MagickBooleanType
182 DDSDecoder(const ImageInfo *,Image *,DDSInfo *,const MagickBooleanType,
185 typedef MagickBooleanType
186 DDSPixelDecoder(Image *,DDSInfo *,ExceptionInfo *);
188 static const DDSSingleColourLookup DDSLookup_5_4[] =
190 { { { 0, 0, 0 }, { 0, 0, 0 } } },
191 { { { 0, 0, 1 }, { 0, 1, 1 } } },
192 { { { 0, 0, 2 }, { 0, 1, 0 } } },
193 { { { 0, 0, 3 }, { 0, 1, 1 } } },
194 { { { 0, 0, 4 }, { 0, 2, 1 } } },
195 { { { 1, 0, 3 }, { 0, 2, 0 } } },
196 { { { 1, 0, 2 }, { 0, 2, 1 } } },
197 { { { 1, 0, 1 }, { 0, 3, 1 } } },
198 { { { 1, 0, 0 }, { 0, 3, 0 } } },
199 { { { 1, 0, 1 }, { 1, 2, 1 } } },
200 { { { 1, 0, 2 }, { 1, 2, 0 } } },
201 { { { 1, 0, 3 }, { 0, 4, 0 } } },
202 { { { 1, 0, 4 }, { 0, 5, 1 } } },
203 { { { 2, 0, 3 }, { 0, 5, 0 } } },
204 { { { 2, 0, 2 }, { 0, 5, 1 } } },
205 { { { 2, 0, 1 }, { 0, 6, 1 } } },
206 { { { 2, 0, 0 }, { 0, 6, 0 } } },
207 { { { 2, 0, 1 }, { 2, 3, 1 } } },
208 { { { 2, 0, 2 }, { 2, 3, 0 } } },
209 { { { 2, 0, 3 }, { 0, 7, 0 } } },
210 { { { 2, 0, 4 }, { 1, 6, 1 } } },
211 { { { 3, 0, 3 }, { 1, 6, 0 } } },
212 { { { 3, 0, 2 }, { 0, 8, 0 } } },
213 { { { 3, 0, 1 }, { 0, 9, 1 } } },
214 { { { 3, 0, 0 }, { 0, 9, 0 } } },
215 { { { 3, 0, 1 }, { 0, 9, 1 } } },
216 { { { 3, 0, 2 }, { 0, 10, 1 } } },
217 { { { 3, 0, 3 }, { 0, 10, 0 } } },
218 { { { 3, 0, 4 }, { 2, 7, 1 } } },
219 { { { 4, 0, 4 }, { 2, 7, 0 } } },
220 { { { 4, 0, 3 }, { 0, 11, 0 } } },
221 { { { 4, 0, 2 }, { 1, 10, 1 } } },
222 { { { 4, 0, 1 }, { 1, 10, 0 } } },
223 { { { 4, 0, 0 }, { 0, 12, 0 } } },
224 { { { 4, 0, 1 }, { 0, 13, 1 } } },
225 { { { 4, 0, 2 }, { 0, 13, 0 } } },
226 { { { 4, 0, 3 }, { 0, 13, 1 } } },
227 { { { 4, 0, 4 }, { 0, 14, 1 } } },
228 { { { 5, 0, 3 }, { 0, 14, 0 } } },
229 { { { 5, 0, 2 }, { 2, 11, 1 } } },
230 { { { 5, 0, 1 }, { 2, 11, 0 } } },
231 { { { 5, 0, 0 }, { 0, 15, 0 } } },
232 { { { 5, 0, 1 }, { 1, 14, 1 } } },
233 { { { 5, 0, 2 }, { 1, 14, 0 } } },
234 { { { 5, 0, 3 }, { 0, 16, 0 } } },
235 { { { 5, 0, 4 }, { 0, 17, 1 } } },
236 { { { 6, 0, 3 }, { 0, 17, 0 } } },
237 { { { 6, 0, 2 }, { 0, 17, 1 } } },
238 { { { 6, 0, 1 }, { 0, 18, 1 } } },
239 { { { 6, 0, 0 }, { 0, 18, 0 } } },
240 { { { 6, 0, 1 }, { 2, 15, 1 } } },
241 { { { 6, 0, 2 }, { 2, 15, 0 } } },
242 { { { 6, 0, 3 }, { 0, 19, 0 } } },
243 { { { 6, 0, 4 }, { 1, 18, 1 } } },
244 { { { 7, 0, 3 }, { 1, 18, 0 } } },
245 { { { 7, 0, 2 }, { 0, 20, 0 } } },
246 { { { 7, 0, 1 }, { 0, 21, 1 } } },
247 { { { 7, 0, 0 }, { 0, 21, 0 } } },
248 { { { 7, 0, 1 }, { 0, 21, 1 } } },
249 { { { 7, 0, 2 }, { 0, 22, 1 } } },
250 { { { 7, 0, 3 }, { 0, 22, 0 } } },
251 { { { 7, 0, 4 }, { 2, 19, 1 } } },
252 { { { 8, 0, 4 }, { 2, 19, 0 } } },
253 { { { 8, 0, 3 }, { 0, 23, 0 } } },
254 { { { 8, 0, 2 }, { 1, 22, 1 } } },
255 { { { 8, 0, 1 }, { 1, 22, 0 } } },
256 { { { 8, 0, 0 }, { 0, 24, 0 } } },
257 { { { 8, 0, 1 }, { 0, 25, 1 } } },
258 { { { 8, 0, 2 }, { 0, 25, 0 } } },
259 { { { 8, 0, 3 }, { 0, 25, 1 } } },
260 { { { 8, 0, 4 }, { 0, 26, 1 } } },
261 { { { 9, 0, 3 }, { 0, 26, 0 } } },
262 { { { 9, 0, 2 }, { 2, 23, 1 } } },
263 { { { 9, 0, 1 }, { 2, 23, 0 } } },
264 { { { 9, 0, 0 }, { 0, 27, 0 } } },
265 { { { 9, 0, 1 }, { 1, 26, 1 } } },
266 { { { 9, 0, 2 }, { 1, 26, 0 } } },
267 { { { 9, 0, 3 }, { 0, 28, 0 } } },
268 { { { 9, 0, 4 }, { 0, 29, 1 } } },
269 { { { 10, 0, 3 }, { 0, 29, 0 } } },
270 { { { 10, 0, 2 }, { 0, 29, 1 } } },
271 { { { 10, 0, 1 }, { 0, 30, 1 } } },
272 { { { 10, 0, 0 }, { 0, 30, 0 } } },
273 { { { 10, 0, 1 }, { 2, 27, 1 } } },
274 { { { 10, 0, 2 }, { 2, 27, 0 } } },
275 { { { 10, 0, 3 }, { 0, 31, 0 } } },
276 { { { 10, 0, 4 }, { 1, 30, 1 } } },
277 { { { 11, 0, 3 }, { 1, 30, 0 } } },
278 { { { 11, 0, 2 }, { 4, 24, 0 } } },
279 { { { 11, 0, 1 }, { 1, 31, 1 } } },
280 { { { 11, 0, 0 }, { 1, 31, 0 } } },
281 { { { 11, 0, 1 }, { 1, 31, 1 } } },
282 { { { 11, 0, 2 }, { 2, 30, 1 } } },
283 { { { 11, 0, 3 }, { 2, 30, 0 } } },
284 { { { 11, 0, 4 }, { 2, 31, 1 } } },
285 { { { 12, 0, 4 }, { 2, 31, 0 } } },
286 { { { 12, 0, 3 }, { 4, 27, 0 } } },
287 { { { 12, 0, 2 }, { 3, 30, 1 } } },
288 { { { 12, 0, 1 }, { 3, 30, 0 } } },
289 { { { 12, 0, 0 }, { 4, 28, 0 } } },
290 { { { 12, 0, 1 }, { 3, 31, 1 } } },
291 { { { 12, 0, 2 }, { 3, 31, 0 } } },
292 { { { 12, 0, 3 }, { 3, 31, 1 } } },
293 { { { 12, 0, 4 }, { 4, 30, 1 } } },
294 { { { 13, 0, 3 }, { 4, 30, 0 } } },
295 { { { 13, 0, 2 }, { 6, 27, 1 } } },
296 { { { 13, 0, 1 }, { 6, 27, 0 } } },
297 { { { 13, 0, 0 }, { 4, 31, 0 } } },
298 { { { 13, 0, 1 }, { 5, 30, 1 } } },
299 { { { 13, 0, 2 }, { 5, 30, 0 } } },
300 { { { 13, 0, 3 }, { 8, 24, 0 } } },
301 { { { 13, 0, 4 }, { 5, 31, 1 } } },
302 { { { 14, 0, 3 }, { 5, 31, 0 } } },
303 { { { 14, 0, 2 }, { 5, 31, 1 } } },
304 { { { 14, 0, 1 }, { 6, 30, 1 } } },
305 { { { 14, 0, 0 }, { 6, 30, 0 } } },
306 { { { 14, 0, 1 }, { 6, 31, 1 } } },
307 { { { 14, 0, 2 }, { 6, 31, 0 } } },
308 { { { 14, 0, 3 }, { 8, 27, 0 } } },
309 { { { 14, 0, 4 }, { 7, 30, 1 } } },
310 { { { 15, 0, 3 }, { 7, 30, 0 } } },
311 { { { 15, 0, 2 }, { 8, 28, 0 } } },
312 { { { 15, 0, 1 }, { 7, 31, 1 } } },
313 { { { 15, 0, 0 }, { 7, 31, 0 } } },
314 { { { 15, 0, 1 }, { 7, 31, 1 } } },
315 { { { 15, 0, 2 }, { 8, 30, 1 } } },
316 { { { 15, 0, 3 }, { 8, 30, 0 } } },
317 { { { 15, 0, 4 }, { 10, 27, 1 } } },
318 { { { 16, 0, 4 }, { 10, 27, 0 } } },
319 { { { 16, 0, 3 }, { 8, 31, 0 } } },
320 { { { 16, 0, 2 }, { 9, 30, 1 } } },
321 { { { 16, 0, 1 }, { 9, 30, 0 } } },
322 { { { 16, 0, 0 }, { 12, 24, 0 } } },
323 { { { 16, 0, 1 }, { 9, 31, 1 } } },
324 { { { 16, 0, 2 }, { 9, 31, 0 } } },
325 { { { 16, 0, 3 }, { 9, 31, 1 } } },
326 { { { 16, 0, 4 }, { 10, 30, 1 } } },
327 { { { 17, 0, 3 }, { 10, 30, 0 } } },
328 { { { 17, 0, 2 }, { 10, 31, 1 } } },
329 { { { 17, 0, 1 }, { 10, 31, 0 } } },
330 { { { 17, 0, 0 }, { 12, 27, 0 } } },
331 { { { 17, 0, 1 }, { 11, 30, 1 } } },
332 { { { 17, 0, 2 }, { 11, 30, 0 } } },
333 { { { 17, 0, 3 }, { 12, 28, 0 } } },
334 { { { 17, 0, 4 }, { 11, 31, 1 } } },
335 { { { 18, 0, 3 }, { 11, 31, 0 } } },
336 { { { 18, 0, 2 }, { 11, 31, 1 } } },
337 { { { 18, 0, 1 }, { 12, 30, 1 } } },
338 { { { 18, 0, 0 }, { 12, 30, 0 } } },
339 { { { 18, 0, 1 }, { 14, 27, 1 } } },
340 { { { 18, 0, 2 }, { 14, 27, 0 } } },
341 { { { 18, 0, 3 }, { 12, 31, 0 } } },
342 { { { 18, 0, 4 }, { 13, 30, 1 } } },
343 { { { 19, 0, 3 }, { 13, 30, 0 } } },
344 { { { 19, 0, 2 }, { 16, 24, 0 } } },
345 { { { 19, 0, 1 }, { 13, 31, 1 } } },
346 { { { 19, 0, 0 }, { 13, 31, 0 } } },
347 { { { 19, 0, 1 }, { 13, 31, 1 } } },
348 { { { 19, 0, 2 }, { 14, 30, 1 } } },
349 { { { 19, 0, 3 }, { 14, 30, 0 } } },
350 { { { 19, 0, 4 }, { 14, 31, 1 } } },
351 { { { 20, 0, 4 }, { 14, 31, 0 } } },
352 { { { 20, 0, 3 }, { 16, 27, 0 } } },
353 { { { 20, 0, 2 }, { 15, 30, 1 } } },
354 { { { 20, 0, 1 }, { 15, 30, 0 } } },
355 { { { 20, 0, 0 }, { 16, 28, 0 } } },
356 { { { 20, 0, 1 }, { 15, 31, 1 } } },
357 { { { 20, 0, 2 }, { 15, 31, 0 } } },
358 { { { 20, 0, 3 }, { 15, 31, 1 } } },
359 { { { 20, 0, 4 }, { 16, 30, 1 } } },
360 { { { 21, 0, 3 }, { 16, 30, 0 } } },
361 { { { 21, 0, 2 }, { 18, 27, 1 } } },
362 { { { 21, 0, 1 }, { 18, 27, 0 } } },
363 { { { 21, 0, 0 }, { 16, 31, 0 } } },
364 { { { 21, 0, 1 }, { 17, 30, 1 } } },
365 { { { 21, 0, 2 }, { 17, 30, 0 } } },
366 { { { 21, 0, 3 }, { 20, 24, 0 } } },
367 { { { 21, 0, 4 }, { 17, 31, 1 } } },
368 { { { 22, 0, 3 }, { 17, 31, 0 } } },
369 { { { 22, 0, 2 }, { 17, 31, 1 } } },
370 { { { 22, 0, 1 }, { 18, 30, 1 } } },
371 { { { 22, 0, 0 }, { 18, 30, 0 } } },
372 { { { 22, 0, 1 }, { 18, 31, 1 } } },
373 { { { 22, 0, 2 }, { 18, 31, 0 } } },
374 { { { 22, 0, 3 }, { 20, 27, 0 } } },
375 { { { 22, 0, 4 }, { 19, 30, 1 } } },
376 { { { 23, 0, 3 }, { 19, 30, 0 } } },
377 { { { 23, 0, 2 }, { 20, 28, 0 } } },
378 { { { 23, 0, 1 }, { 19, 31, 1 } } },
379 { { { 23, 0, 0 }, { 19, 31, 0 } } },
380 { { { 23, 0, 1 }, { 19, 31, 1 } } },
381 { { { 23, 0, 2 }, { 20, 30, 1 } } },
382 { { { 23, 0, 3 }, { 20, 30, 0 } } },
383 { { { 23, 0, 4 }, { 22, 27, 1 } } },
384 { { { 24, 0, 4 }, { 22, 27, 0 } } },
385 { { { 24, 0, 3 }, { 20, 31, 0 } } },
386 { { { 24, 0, 2 }, { 21, 30, 1 } } },
387 { { { 24, 0, 1 }, { 21, 30, 0 } } },
388 { { { 24, 0, 0 }, { 24, 24, 0 } } },
389 { { { 24, 0, 1 }, { 21, 31, 1 } } },
390 { { { 24, 0, 2 }, { 21, 31, 0 } } },
391 { { { 24, 0, 3 }, { 21, 31, 1 } } },
392 { { { 24, 0, 4 }, { 22, 30, 1 } } },
393 { { { 25, 0, 3 }, { 22, 30, 0 } } },
394 { { { 25, 0, 2 }, { 22, 31, 1 } } },
395 { { { 25, 0, 1 }, { 22, 31, 0 } } },
396 { { { 25, 0, 0 }, { 24, 27, 0 } } },
397 { { { 25, 0, 1 }, { 23, 30, 1 } } },
398 { { { 25, 0, 2 }, { 23, 30, 0 } } },
399 { { { 25, 0, 3 }, { 24, 28, 0 } } },
400 { { { 25, 0, 4 }, { 23, 31, 1 } } },
401 { { { 26, 0, 3 }, { 23, 31, 0 } } },
402 { { { 26, 0, 2 }, { 23, 31, 1 } } },
403 { { { 26, 0, 1 }, { 24, 30, 1 } } },
404 { { { 26, 0, 0 }, { 24, 30, 0 } } },
405 { { { 26, 0, 1 }, { 26, 27, 1 } } },
406 { { { 26, 0, 2 }, { 26, 27, 0 } } },
407 { { { 26, 0, 3 }, { 24, 31, 0 } } },
408 { { { 26, 0, 4 }, { 25, 30, 1 } } },
409 { { { 27, 0, 3 }, { 25, 30, 0 } } },
410 { { { 27, 0, 2 }, { 28, 24, 0 } } },
411 { { { 27, 0, 1 }, { 25, 31, 1 } } },
412 { { { 27, 0, 0 }, { 25, 31, 0 } } },
413 { { { 27, 0, 1 }, { 25, 31, 1 } } },
414 { { { 27, 0, 2 }, { 26, 30, 1 } } },
415 { { { 27, 0, 3 }, { 26, 30, 0 } } },
416 { { { 27, 0, 4 }, { 26, 31, 1 } } },
417 { { { 28, 0, 4 }, { 26, 31, 0 } } },
418 { { { 28, 0, 3 }, { 28, 27, 0 } } },
419 { { { 28, 0, 2 }, { 27, 30, 1 } } },
420 { { { 28, 0, 1 }, { 27, 30, 0 } } },
421 { { { 28, 0, 0 }, { 28, 28, 0 } } },
422 { { { 28, 0, 1 }, { 27, 31, 1 } } },
423 { { { 28, 0, 2 }, { 27, 31, 0 } } },
424 { { { 28, 0, 3 }, { 27, 31, 1 } } },
425 { { { 28, 0, 4 }, { 28, 30, 1 } } },
426 { { { 29, 0, 3 }, { 28, 30, 0 } } },
427 { { { 29, 0, 2 }, { 30, 27, 1 } } },
428 { { { 29, 0, 1 }, { 30, 27, 0 } } },
429 { { { 29, 0, 0 }, { 28, 31, 0 } } },
430 { { { 29, 0, 1 }, { 29, 30, 1 } } },
431 { { { 29, 0, 2 }, { 29, 30, 0 } } },
432 { { { 29, 0, 3 }, { 29, 30, 1 } } },
433 { { { 29, 0, 4 }, { 29, 31, 1 } } },
434 { { { 30, 0, 3 }, { 29, 31, 0 } } },
435 { { { 30, 0, 2 }, { 29, 31, 1 } } },
436 { { { 30, 0, 1 }, { 30, 30, 1 } } },
437 { { { 30, 0, 0 }, { 30, 30, 0 } } },
438 { { { 30, 0, 1 }, { 30, 31, 1 } } },
439 { { { 30, 0, 2 }, { 30, 31, 0 } } },
440 { { { 30, 0, 3 }, { 30, 31, 1 } } },
441 { { { 30, 0, 4 }, { 31, 30, 1 } } },
442 { { { 31, 0, 3 }, { 31, 30, 0 } } },
443 { { { 31, 0, 2 }, { 31, 30, 1 } } },
444 { { { 31, 0, 1 }, { 31, 31, 1 } } },
445 { { { 31, 0, 0 }, { 31, 31, 0 } } }
448 static const DDSSingleColourLookup DDSLookup_6_4[] =
450 { { { 0, 0, 0 }, { 0, 0, 0 } } },
451 { { { 0, 0, 1 }, { 0, 1, 0 } } },
452 { { { 0, 0, 2 }, { 0, 2, 0 } } },
453 { { { 1, 0, 1 }, { 0, 3, 1 } } },
454 { { { 1, 0, 0 }, { 0, 3, 0 } } },
455 { { { 1, 0, 1 }, { 0, 4, 0 } } },
456 { { { 1, 0, 2 }, { 0, 5, 0 } } },
457 { { { 2, 0, 1 }, { 0, 6, 1 } } },
458 { { { 2, 0, 0 }, { 0, 6, 0 } } },
459 { { { 2, 0, 1 }, { 0, 7, 0 } } },
460 { { { 2, 0, 2 }, { 0, 8, 0 } } },
461 { { { 3, 0, 1 }, { 0, 9, 1 } } },
462 { { { 3, 0, 0 }, { 0, 9, 0 } } },
463 { { { 3, 0, 1 }, { 0, 10, 0 } } },
464 { { { 3, 0, 2 }, { 0, 11, 0 } } },
465 { { { 4, 0, 1 }, { 0, 12, 1 } } },
466 { { { 4, 0, 0 }, { 0, 12, 0 } } },
467 { { { 4, 0, 1 }, { 0, 13, 0 } } },
468 { { { 4, 0, 2 }, { 0, 14, 0 } } },
469 { { { 5, 0, 1 }, { 0, 15, 1 } } },
470 { { { 5, 0, 0 }, { 0, 15, 0 } } },
471 { { { 5, 0, 1 }, { 0, 16, 0 } } },
472 { { { 5, 0, 2 }, { 1, 15, 0 } } },
473 { { { 6, 0, 1 }, { 0, 17, 0 } } },
474 { { { 6, 0, 0 }, { 0, 18, 0 } } },
475 { { { 6, 0, 1 }, { 0, 19, 0 } } },
476 { { { 6, 0, 2 }, { 3, 14, 0 } } },
477 { { { 7, 0, 1 }, { 0, 20, 0 } } },
478 { { { 7, 0, 0 }, { 0, 21, 0 } } },
479 { { { 7, 0, 1 }, { 0, 22, 0 } } },
480 { { { 7, 0, 2 }, { 4, 15, 0 } } },
481 { { { 8, 0, 1 }, { 0, 23, 0 } } },
482 { { { 8, 0, 0 }, { 0, 24, 0 } } },
483 { { { 8, 0, 1 }, { 0, 25, 0 } } },
484 { { { 8, 0, 2 }, { 6, 14, 0 } } },
485 { { { 9, 0, 1 }, { 0, 26, 0 } } },
486 { { { 9, 0, 0 }, { 0, 27, 0 } } },
487 { { { 9, 0, 1 }, { 0, 28, 0 } } },
488 { { { 9, 0, 2 }, { 7, 15, 0 } } },
489 { { { 10, 0, 1 }, { 0, 29, 0 } } },
490 { { { 10, 0, 0 }, { 0, 30, 0 } } },
491 { { { 10, 0, 1 }, { 0, 31, 0 } } },
492 { { { 10, 0, 2 }, { 9, 14, 0 } } },
493 { { { 11, 0, 1 }, { 0, 32, 0 } } },
494 { { { 11, 0, 0 }, { 0, 33, 0 } } },
495 { { { 11, 0, 1 }, { 2, 30, 0 } } },
496 { { { 11, 0, 2 }, { 0, 34, 0 } } },
497 { { { 12, 0, 1 }, { 0, 35, 0 } } },
498 { { { 12, 0, 0 }, { 0, 36, 0 } } },
499 { { { 12, 0, 1 }, { 3, 31, 0 } } },
500 { { { 12, 0, 2 }, { 0, 37, 0 } } },
501 { { { 13, 0, 1 }, { 0, 38, 0 } } },
502 { { { 13, 0, 0 }, { 0, 39, 0 } } },
503 { { { 13, 0, 1 }, { 5, 30, 0 } } },
504 { { { 13, 0, 2 }, { 0, 40, 0 } } },
505 { { { 14, 0, 1 }, { 0, 41, 0 } } },
506 { { { 14, 0, 0 }, { 0, 42, 0 } } },
507 { { { 14, 0, 1 }, { 6, 31, 0 } } },
508 { { { 14, 0, 2 }, { 0, 43, 0 } } },
509 { { { 15, 0, 1 }, { 0, 44, 0 } } },
510 { { { 15, 0, 0 }, { 0, 45, 0 } } },
511 { { { 15, 0, 1 }, { 8, 30, 0 } } },
512 { { { 15, 0, 2 }, { 0, 46, 0 } } },
513 { { { 16, 0, 2 }, { 0, 47, 0 } } },
514 { { { 16, 0, 1 }, { 1, 46, 0 } } },
515 { { { 16, 0, 0 }, { 0, 48, 0 } } },
516 { { { 16, 0, 1 }, { 0, 49, 0 } } },
517 { { { 16, 0, 2 }, { 0, 50, 0 } } },
518 { { { 17, 0, 1 }, { 2, 47, 0 } } },
519 { { { 17, 0, 0 }, { 0, 51, 0 } } },
520 { { { 17, 0, 1 }, { 0, 52, 0 } } },
521 { { { 17, 0, 2 }, { 0, 53, 0 } } },
522 { { { 18, 0, 1 }, { 4, 46, 0 } } },
523 { { { 18, 0, 0 }, { 0, 54, 0 } } },
524 { { { 18, 0, 1 }, { 0, 55, 0 } } },
525 { { { 18, 0, 2 }, { 0, 56, 0 } } },
526 { { { 19, 0, 1 }, { 5, 47, 0 } } },
527 { { { 19, 0, 0 }, { 0, 57, 0 } } },
528 { { { 19, 0, 1 }, { 0, 58, 0 } } },
529 { { { 19, 0, 2 }, { 0, 59, 0 } } },
530 { { { 20, 0, 1 }, { 7, 46, 0 } } },
531 { { { 20, 0, 0 }, { 0, 60, 0 } } },
532 { { { 20, 0, 1 }, { 0, 61, 0 } } },
533 { { { 20, 0, 2 }, { 0, 62, 0 } } },
534 { { { 21, 0, 1 }, { 8, 47, 0 } } },
535 { { { 21, 0, 0 }, { 0, 63, 0 } } },
536 { { { 21, 0, 1 }, { 1, 62, 0 } } },
537 { { { 21, 0, 2 }, { 1, 63, 0 } } },
538 { { { 22, 0, 1 }, { 10, 46, 0 } } },
539 { { { 22, 0, 0 }, { 2, 62, 0 } } },
540 { { { 22, 0, 1 }, { 2, 63, 0 } } },
541 { { { 22, 0, 2 }, { 3, 62, 0 } } },
542 { { { 23, 0, 1 }, { 11, 47, 0 } } },
543 { { { 23, 0, 0 }, { 3, 63, 0 } } },
544 { { { 23, 0, 1 }, { 4, 62, 0 } } },
545 { { { 23, 0, 2 }, { 4, 63, 0 } } },
546 { { { 24, 0, 1 }, { 13, 46, 0 } } },
547 { { { 24, 0, 0 }, { 5, 62, 0 } } },
548 { { { 24, 0, 1 }, { 5, 63, 0 } } },
549 { { { 24, 0, 2 }, { 6, 62, 0 } } },
550 { { { 25, 0, 1 }, { 14, 47, 0 } } },
551 { { { 25, 0, 0 }, { 6, 63, 0 } } },
552 { { { 25, 0, 1 }, { 7, 62, 0 } } },
553 { { { 25, 0, 2 }, { 7, 63, 0 } } },
554 { { { 26, 0, 1 }, { 16, 45, 0 } } },
555 { { { 26, 0, 0 }, { 8, 62, 0 } } },
556 { { { 26, 0, 1 }, { 8, 63, 0 } } },
557 { { { 26, 0, 2 }, { 9, 62, 0 } } },
558 { { { 27, 0, 1 }, { 16, 48, 0 } } },
559 { { { 27, 0, 0 }, { 9, 63, 0 } } },
560 { { { 27, 0, 1 }, { 10, 62, 0 } } },
561 { { { 27, 0, 2 }, { 10, 63, 0 } } },
562 { { { 28, 0, 1 }, { 16, 51, 0 } } },
563 { { { 28, 0, 0 }, { 11, 62, 0 } } },
564 { { { 28, 0, 1 }, { 11, 63, 0 } } },
565 { { { 28, 0, 2 }, { 12, 62, 0 } } },
566 { { { 29, 0, 1 }, { 16, 54, 0 } } },
567 { { { 29, 0, 0 }, { 12, 63, 0 } } },
568 { { { 29, 0, 1 }, { 13, 62, 0 } } },
569 { { { 29, 0, 2 }, { 13, 63, 0 } } },
570 { { { 30, 0, 1 }, { 16, 57, 0 } } },
571 { { { 30, 0, 0 }, { 14, 62, 0 } } },
572 { { { 30, 0, 1 }, { 14, 63, 0 } } },
573 { { { 30, 0, 2 }, { 15, 62, 0 } } },
574 { { { 31, 0, 1 }, { 16, 60, 0 } } },
575 { { { 31, 0, 0 }, { 15, 63, 0 } } },
576 { { { 31, 0, 1 }, { 24, 46, 0 } } },
577 { { { 31, 0, 2 }, { 16, 62, 0 } } },
578 { { { 32, 0, 2 }, { 16, 63, 0 } } },
579 { { { 32, 0, 1 }, { 17, 62, 0 } } },
580 { { { 32, 0, 0 }, { 25, 47, 0 } } },
581 { { { 32, 0, 1 }, { 17, 63, 0 } } },
582 { { { 32, 0, 2 }, { 18, 62, 0 } } },
583 { { { 33, 0, 1 }, { 18, 63, 0 } } },
584 { { { 33, 0, 0 }, { 27, 46, 0 } } },
585 { { { 33, 0, 1 }, { 19, 62, 0 } } },
586 { { { 33, 0, 2 }, { 19, 63, 0 } } },
587 { { { 34, 0, 1 }, { 20, 62, 0 } } },
588 { { { 34, 0, 0 }, { 28, 47, 0 } } },
589 { { { 34, 0, 1 }, { 20, 63, 0 } } },
590 { { { 34, 0, 2 }, { 21, 62, 0 } } },
591 { { { 35, 0, 1 }, { 21, 63, 0 } } },
592 { { { 35, 0, 0 }, { 30, 46, 0 } } },
593 { { { 35, 0, 1 }, { 22, 62, 0 } } },
594 { { { 35, 0, 2 }, { 22, 63, 0 } } },
595 { { { 36, 0, 1 }, { 23, 62, 0 } } },
596 { { { 36, 0, 0 }, { 31, 47, 0 } } },
597 { { { 36, 0, 1 }, { 23, 63, 0 } } },
598 { { { 36, 0, 2 }, { 24, 62, 0 } } },
599 { { { 37, 0, 1 }, { 24, 63, 0 } } },
600 { { { 37, 0, 0 }, { 32, 47, 0 } } },
601 { { { 37, 0, 1 }, { 25, 62, 0 } } },
602 { { { 37, 0, 2 }, { 25, 63, 0 } } },
603 { { { 38, 0, 1 }, { 26, 62, 0 } } },
604 { { { 38, 0, 0 }, { 32, 50, 0 } } },
605 { { { 38, 0, 1 }, { 26, 63, 0 } } },
606 { { { 38, 0, 2 }, { 27, 62, 0 } } },
607 { { { 39, 0, 1 }, { 27, 63, 0 } } },
608 { { { 39, 0, 0 }, { 32, 53, 0 } } },
609 { { { 39, 0, 1 }, { 28, 62, 0 } } },
610 { { { 39, 0, 2 }, { 28, 63, 0 } } },
611 { { { 40, 0, 1 }, { 29, 62, 0 } } },
612 { { { 40, 0, 0 }, { 32, 56, 0 } } },
613 { { { 40, 0, 1 }, { 29, 63, 0 } } },
614 { { { 40, 0, 2 }, { 30, 62, 0 } } },
615 { { { 41, 0, 1 }, { 30, 63, 0 } } },
616 { { { 41, 0, 0 }, { 32, 59, 0 } } },
617 { { { 41, 0, 1 }, { 31, 62, 0 } } },
618 { { { 41, 0, 2 }, { 31, 63, 0 } } },
619 { { { 42, 0, 1 }, { 32, 61, 0 } } },
620 { { { 42, 0, 0 }, { 32, 62, 0 } } },
621 { { { 42, 0, 1 }, { 32, 63, 0 } } },
622 { { { 42, 0, 2 }, { 41, 46, 0 } } },
623 { { { 43, 0, 1 }, { 33, 62, 0 } } },
624 { { { 43, 0, 0 }, { 33, 63, 0 } } },
625 { { { 43, 0, 1 }, { 34, 62, 0 } } },
626 { { { 43, 0, 2 }, { 42, 47, 0 } } },
627 { { { 44, 0, 1 }, { 34, 63, 0 } } },
628 { { { 44, 0, 0 }, { 35, 62, 0 } } },
629 { { { 44, 0, 1 }, { 35, 63, 0 } } },
630 { { { 44, 0, 2 }, { 44, 46, 0 } } },
631 { { { 45, 0, 1 }, { 36, 62, 0 } } },
632 { { { 45, 0, 0 }, { 36, 63, 0 } } },
633 { { { 45, 0, 1 }, { 37, 62, 0 } } },
634 { { { 45, 0, 2 }, { 45, 47, 0 } } },
635 { { { 46, 0, 1 }, { 37, 63, 0 } } },
636 { { { 46, 0, 0 }, { 38, 62, 0 } } },
637 { { { 46, 0, 1 }, { 38, 63, 0 } } },
638 { { { 46, 0, 2 }, { 47, 46, 0 } } },
639 { { { 47, 0, 1 }, { 39, 62, 0 } } },
640 { { { 47, 0, 0 }, { 39, 63, 0 } } },
641 { { { 47, 0, 1 }, { 40, 62, 0 } } },
642 { { { 47, 0, 2 }, { 48, 46, 0 } } },
643 { { { 48, 0, 2 }, { 40, 63, 0 } } },
644 { { { 48, 0, 1 }, { 41, 62, 0 } } },
645 { { { 48, 0, 0 }, { 41, 63, 0 } } },
646 { { { 48, 0, 1 }, { 48, 49, 0 } } },
647 { { { 48, 0, 2 }, { 42, 62, 0 } } },
648 { { { 49, 0, 1 }, { 42, 63, 0 } } },
649 { { { 49, 0, 0 }, { 43, 62, 0 } } },
650 { { { 49, 0, 1 }, { 48, 52, 0 } } },
651 { { { 49, 0, 2 }, { 43, 63, 0 } } },
652 { { { 50, 0, 1 }, { 44, 62, 0 } } },
653 { { { 50, 0, 0 }, { 44, 63, 0 } } },
654 { { { 50, 0, 1 }, { 48, 55, 0 } } },
655 { { { 50, 0, 2 }, { 45, 62, 0 } } },
656 { { { 51, 0, 1 }, { 45, 63, 0 } } },
657 { { { 51, 0, 0 }, { 46, 62, 0 } } },
658 { { { 51, 0, 1 }, { 48, 58, 0 } } },
659 { { { 51, 0, 2 }, { 46, 63, 0 } } },
660 { { { 52, 0, 1 }, { 47, 62, 0 } } },
661 { { { 52, 0, 0 }, { 47, 63, 0 } } },
662 { { { 52, 0, 1 }, { 48, 61, 0 } } },
663 { { { 52, 0, 2 }, { 48, 62, 0 } } },
664 { { { 53, 0, 1 }, { 56, 47, 0 } } },
665 { { { 53, 0, 0 }, { 48, 63, 0 } } },
666 { { { 53, 0, 1 }, { 49, 62, 0 } } },
667 { { { 53, 0, 2 }, { 49, 63, 0 } } },
668 { { { 54, 0, 1 }, { 58, 46, 0 } } },
669 { { { 54, 0, 0 }, { 50, 62, 0 } } },
670 { { { 54, 0, 1 }, { 50, 63, 0 } } },
671 { { { 54, 0, 2 }, { 51, 62, 0 } } },
672 { { { 55, 0, 1 }, { 59, 47, 0 } } },
673 { { { 55, 0, 0 }, { 51, 63, 0 } } },
674 { { { 55, 0, 1 }, { 52, 62, 0 } } },
675 { { { 55, 0, 2 }, { 52, 63, 0 } } },
676 { { { 56, 0, 1 }, { 61, 46, 0 } } },
677 { { { 56, 0, 0 }, { 53, 62, 0 } } },
678 { { { 56, 0, 1 }, { 53, 63, 0 } } },
679 { { { 56, 0, 2 }, { 54, 62, 0 } } },
680 { { { 57, 0, 1 }, { 62, 47, 0 } } },
681 { { { 57, 0, 0 }, { 54, 63, 0 } } },
682 { { { 57, 0, 1 }, { 55, 62, 0 } } },
683 { { { 57, 0, 2 }, { 55, 63, 0 } } },
684 { { { 58, 0, 1 }, { 56, 62, 1 } } },
685 { { { 58, 0, 0 }, { 56, 62, 0 } } },
686 { { { 58, 0, 1 }, { 56, 63, 0 } } },
687 { { { 58, 0, 2 }, { 57, 62, 0 } } },
688 { { { 59, 0, 1 }, { 57, 63, 1 } } },
689 { { { 59, 0, 0 }, { 57, 63, 0 } } },
690 { { { 59, 0, 1 }, { 58, 62, 0 } } },
691 { { { 59, 0, 2 }, { 58, 63, 0 } } },
692 { { { 60, 0, 1 }, { 59, 62, 1 } } },
693 { { { 60, 0, 0 }, { 59, 62, 0 } } },
694 { { { 60, 0, 1 }, { 59, 63, 0 } } },
695 { { { 60, 0, 2 }, { 60, 62, 0 } } },
696 { { { 61, 0, 1 }, { 60, 63, 1 } } },
697 { { { 61, 0, 0 }, { 60, 63, 0 } } },
698 { { { 61, 0, 1 }, { 61, 62, 0 } } },
699 { { { 61, 0, 2 }, { 61, 63, 0 } } },
700 { { { 62, 0, 1 }, { 62, 62, 1 } } },
701 { { { 62, 0, 0 }, { 62, 62, 0 } } },
702 { { { 62, 0, 1 }, { 62, 63, 0 } } },
703 { { { 62, 0, 2 }, { 63, 62, 0 } } },
704 { { { 63, 0, 1 }, { 63, 63, 1 } } },
705 { { { 63, 0, 0 }, { 63, 63, 0 } } }
708 static const DDSSingleColourLookup*
719 #define C565_r(x) (((x) & 0xF800) >> 11)
720 #define C565_g(x) (((x) & 0x07E0) >> 5)
721 #define C565_b(x) ((x) & 0x001F)
723 #define C565_red(x) ( (C565_r(x) << 3 | C565_r(x) >> 2))
724 #define C565_green(x) ( (C565_g(x) << 2 | C565_g(x) >> 4))
725 #define C565_blue(x) ( (C565_b(x) << 3 | C565_b(x) >> 2))
727 #define DIV2(x) ((x) > 1 ? ((x) >> 1) : 1)
729 #define FixRange(min, max, steps) \
732 if ((ssize_t) max - min < steps) \
733 max = MagickMin(min + steps, 255); \
734 if ((ssize_t) max - min < steps) \
735 min = MagickMax(0, (ssize_t) max - steps)
737 #define Dot(left, right) (left.x*right.x) + (left.y*right.y) + (left.z*right.z)
739 #define VectorInit(vector, value) vector.x = vector.y = vector.z = vector.w \
741 #define VectorInit3(vector, value) vector.x = vector.y = vector.z = value
743 #define IsBitMask(mask, r, g, b, a) (mask.r_bitmask == r && mask.g_bitmask == \
744 g && mask.b_bitmask == b && mask.alpha_bitmask == a)
752 static MagickBooleanType
753 ConstructOrdering(const size_t,const DDSVector4 *,const DDSVector3,
754 DDSVector4 *, DDSVector4 *, unsigned char *, size_t),
755 ReadDDSInfo(Image *,DDSInfo *),
756 ReadDXT1(const ImageInfo *,Image *,DDSInfo *,const MagickBooleanType,
758 ReadDXT3(const ImageInfo *,Image *,DDSInfo *,const MagickBooleanType,
760 ReadDXT5(const ImageInfo *,Image *,DDSInfo *,const MagickBooleanType,
762 ReadUncompressedRGB(const ImageInfo *,Image *,DDSInfo *,
763 const MagickBooleanType,ExceptionInfo *),
764 ReadUncompressedRGBA(const ImageInfo *,Image *,DDSInfo *,
765 const MagickBooleanType,ExceptionInfo *),
766 SkipDXTMipmaps(Image *,DDSInfo *,int,ExceptionInfo *),
767 SkipRGBMipmaps(Image *,DDSInfo *,int,ExceptionInfo *),
768 WriteDDSImage(const ImageInfo *,Image *,ExceptionInfo *),
769 WriteMipmaps(Image *,const ImageInfo*,const size_t,const size_t,const size_t,
770 const MagickBooleanType,const MagickBooleanType,const MagickBooleanType,
774 RemapIndices(const ssize_t *,const unsigned char *,unsigned char *),
775 WriteDDSInfo(Image *,const size_t,const size_t,const size_t),
776 WriteFourCC(Image *,const size_t,const MagickBooleanType,
777 const MagickBooleanType,ExceptionInfo *),
778 WriteImageData(Image *,const size_t,const size_t,const MagickBooleanType,
779 const MagickBooleanType,ExceptionInfo *),
780 WriteIndices(Image *,const DDSVector3,const DDSVector3,unsigned char *),
781 WriteSingleColorFit(Image *,const DDSVector4 *,const ssize_t *),
782 WriteUncompressed(Image *,ExceptionInfo *);
784 static inline void VectorAdd(const DDSVector4 left, const DDSVector4 right,
785 DDSVector4 *destination)
787 destination->x = left.x + right.x;
788 destination->y = left.y + right.y;
789 destination->z = left.z + right.z;
790 destination->w = left.w + right.w;
793 static inline void VectorClamp(DDSVector4 *value)
795 value->x = MagickMin(1.0f,MagickMax(0.0f,value->x));
796 value->y = MagickMin(1.0f,MagickMax(0.0f,value->y));
797 value->z = MagickMin(1.0f,MagickMax(0.0f,value->z));
798 value->w = MagickMin(1.0f,MagickMax(0.0f,value->w));
801 static inline void VectorClamp3(DDSVector3 *value)
803 value->x = MagickMin(1.0f,MagickMax(0.0f,value->x));
804 value->y = MagickMin(1.0f,MagickMax(0.0f,value->y));
805 value->z = MagickMin(1.0f,MagickMax(0.0f,value->z));
808 static inline void VectorCopy43(const DDSVector4 source,
809 DDSVector3 *destination)
811 destination->x = source.x;
812 destination->y = source.y;
813 destination->z = source.z;
816 static inline void VectorCopy44(const DDSVector4 source,
817 DDSVector4 *destination)
819 destination->x = source.x;
820 destination->y = source.y;
821 destination->z = source.z;
822 destination->w = source.w;
825 static inline void VectorNegativeMultiplySubtract(const DDSVector4 a,
826 const DDSVector4 b, const DDSVector4 c, DDSVector4 *destination)
828 destination->x = c.x - (a.x * b.x);
829 destination->y = c.y - (a.y * b.y);
830 destination->z = c.z - (a.z * b.z);
831 destination->w = c.w - (a.w * b.w);
834 static inline void VectorMultiply(const DDSVector4 left,
835 const DDSVector4 right, DDSVector4 *destination)
837 destination->x = left.x * right.x;
838 destination->y = left.y * right.y;
839 destination->z = left.z * right.z;
840 destination->w = left.w * right.w;
843 static inline void VectorMultiply3(const DDSVector3 left,
844 const DDSVector3 right, DDSVector3 *destination)
846 destination->x = left.x * right.x;
847 destination->y = left.y * right.y;
848 destination->z = left.z * right.z;
851 static inline void VectorMultiplyAdd(const DDSVector4 a, const DDSVector4 b,
852 const DDSVector4 c, DDSVector4 *destination)
854 destination->x = (a.x * b.x) + c.x;
855 destination->y = (a.y * b.y) + c.y;
856 destination->z = (a.z * b.z) + c.z;
857 destination->w = (a.w * b.w) + c.w;
860 static inline void VectorMultiplyAdd3(const DDSVector3 a, const DDSVector3 b,
861 const DDSVector3 c, DDSVector3 *destination)
863 destination->x = (a.x * b.x) + c.x;
864 destination->y = (a.y * b.y) + c.y;
865 destination->z = (a.z * b.z) + c.z;
868 static inline void VectorReciprocal(const DDSVector4 value,
869 DDSVector4 *destination)
871 destination->x = 1.0f / value.x;
872 destination->y = 1.0f / value.y;
873 destination->z = 1.0f / value.z;
874 destination->w = 1.0f / value.w;
877 static inline void VectorSubtract(const DDSVector4 left,
878 const DDSVector4 right, DDSVector4 *destination)
880 destination->x = left.x - right.x;
881 destination->y = left.y - right.y;
882 destination->z = left.z - right.z;
883 destination->w = left.w - right.w;
886 static inline void VectorSubtract3(const DDSVector3 left,
887 const DDSVector3 right, DDSVector3 *destination)
889 destination->x = left.x - right.x;
890 destination->y = left.y - right.y;
891 destination->z = left.z - right.z;
894 static inline void VectorTruncate(DDSVector4 *value)
896 value->x = value->x > 0.0f ? floor(value->x) : ceil(value->x);
897 value->y = value->y > 0.0f ? floor(value->y) : ceil(value->y);
898 value->z = value->z > 0.0f ? floor(value->z) : ceil(value->z);
899 value->w = value->w > 0.0f ? floor(value->w) : ceil(value->w);
902 static inline void VectorTruncate3(DDSVector3 *value)
904 value->x = value->x > 0.0f ? floor(value->x) : ceil(value->x);
905 value->y = value->y > 0.0f ? floor(value->y) : ceil(value->y);
906 value->z = value->z > 0.0f ? floor(value->z) : ceil(value->z);
909 static void CalculateColors(unsigned short c0, unsigned short c1,
910 DDSColors *c, MagickBooleanType ignoreAlpha)
912 c->a[0] = c->a[1] = c->a[2] = c->a[3] = 0;
914 c->r[0] = (unsigned char) C565_red(c0);
915 c->g[0] = (unsigned char) C565_green(c0);
916 c->b[0] = (unsigned char) C565_blue(c0);
918 c->r[1] = (unsigned char) C565_red(c1);
919 c->g[1] = (unsigned char) C565_green(c1);
920 c->b[1] = (unsigned char) C565_blue(c1);
922 if (ignoreAlpha != MagickFalse || c0 > c1)
924 c->r[2] = (unsigned char) ((2 * c->r[0] + c->r[1]) / 3);
925 c->g[2] = (unsigned char) ((2 * c->g[0] + c->g[1]) / 3);
926 c->b[2] = (unsigned char) ((2 * c->b[0] + c->b[1]) / 3);
928 c->r[3] = (unsigned char) ((c->r[0] + 2 * c->r[1]) / 3);
929 c->g[3] = (unsigned char) ((c->g[0] + 2 * c->g[1]) / 3);
930 c->b[3] = (unsigned char) ((c->b[0] + 2 * c->b[1]) / 3);
934 c->r[2] = (unsigned char) ((c->r[0] + c->r[1]) / 2);
935 c->g[2] = (unsigned char) ((c->g[0] + c->g[1]) / 2);
936 c->b[2] = (unsigned char) ((c->b[0] + c->b[1]) / 2);
938 c->r[3] = c->g[3] = c->b[3] = 0;
943 static size_t CompressAlpha(const size_t min, const size_t max,
944 const size_t steps, const ssize_t *alphas, unsigned char* indices)
959 codes[0] = (unsigned char) min;
960 codes[1] = (unsigned char) max;
964 for (i=1; i < (ssize_t) steps; i++)
965 codes[i+1] = (unsigned char) (((steps-i)*min + i*max) / steps);
984 dist = value - (size_t)codes[j];
994 indices[i] = (unsigned char)index;
1001 static void CompressClusterFit(const size_t count,
1002 const DDSVector4 *points, const ssize_t *map, const DDSVector3 principle,
1003 const DDSVector4 metric, DDSVector3 *start, DDSVector3* end,
1004 unsigned char *indices)
1017 twothirds_twothirds2,
1038 VectorInit(half,0.5f);
1039 VectorInit(two,2.0f);
1041 VectorInit(onethird_onethird2,1.0f/3.0f);
1042 onethird_onethird2.w = 1.0f/9.0f;
1043 VectorInit(twothirds_twothirds2,2.0f/3.0f);
1044 twothirds_twothirds2.w = 4.0f/9.0f;
1045 VectorInit(twonineths,2.0f/9.0f);
1052 gridrcp.x = 1.0f/31.0f;
1053 gridrcp.y = 1.0f/63.0f;
1054 gridrcp.z = 1.0f/31.0f;
1062 ConstructOrdering(count,points,principle,pointsWeights,&xSumwSum,order,0);
1064 for (iterationIndex = 0;;)
1066 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1067 #pragma omp parallel for schedule(dynamic,1) \
1068 num_threads(GetMagickResourceLimit(ThreadResource))
1070 for (i=0; i < (ssize_t) count; i++)
1083 VectorInit(part0,0.0f);
1084 for(ii=0; ii < (size_t) i; ii++)
1085 VectorAdd(pointsWeights[ii],part0,&part0);
1087 VectorInit(part1,0.0f);
1088 for (j=(size_t) i;;)
1092 VectorCopy44(pointsWeights[0],&part2);
1097 VectorInit(part2,0.0f);
1119 VectorSubtract(xSumwSum,part2,&part3);
1120 VectorSubtract(part3,part1,&part3);
1121 VectorSubtract(part3,part0,&part3);
1123 VectorMultiplyAdd(part1,twothirds_twothirds2,part0,&alphax_sum);
1124 VectorMultiplyAdd(part2,onethird_onethird2,alphax_sum,&alphax_sum);
1125 VectorInit(alpha2_sum,alphax_sum.w);
1127 VectorMultiplyAdd(part2,twothirds_twothirds2,part3,&betax_sum);
1128 VectorMultiplyAdd(part1,onethird_onethird2,betax_sum,&betax_sum);
1129 VectorInit(beta2_sum,betax_sum.w);
1131 VectorAdd(part1,part2,&alphabeta_sum);
1132 VectorInit(alphabeta_sum,alphabeta_sum.w);
1133 VectorMultiply(twonineths,alphabeta_sum,&alphabeta_sum);
1135 VectorMultiply(alpha2_sum,beta2_sum,&factor);
1136 VectorNegativeMultiplySubtract(alphabeta_sum,alphabeta_sum,factor,
1138 VectorReciprocal(factor,&factor);
1140 VectorMultiply(alphax_sum,beta2_sum,&a);
1141 VectorNegativeMultiplySubtract(betax_sum,alphabeta_sum,a,&a);
1142 VectorMultiply(a,factor,&a);
1144 VectorMultiply(betax_sum,alpha2_sum,&b);
1145 VectorNegativeMultiplySubtract(alphax_sum,alphabeta_sum,b,&b);
1146 VectorMultiply(b,factor,&b);
1149 VectorMultiplyAdd(grid,a,half,&a);
1151 VectorMultiply(a,gridrcp,&a);
1154 VectorMultiplyAdd(grid,b,half,&b);
1156 VectorMultiply(b,gridrcp,&b);
1158 VectorMultiply(b,b,&e1);
1159 VectorMultiply(e1,beta2_sum,&e1);
1160 VectorMultiply(a,a,&e2);
1161 VectorMultiplyAdd(e2,alpha2_sum,e1,&e1);
1163 VectorMultiply(a,b,&e2);
1164 VectorMultiply(e2,alphabeta_sum,&e2);
1165 VectorNegativeMultiplySubtract(a,alphax_sum,e2,&e2);
1166 VectorNegativeMultiplySubtract(b,betax_sum,e2,&e2);
1167 VectorMultiplyAdd(two,e2,e1,&e2);
1168 VectorMultiply(e2,metric,&e2);
1170 error = e2.x + e2.y + e2.z;
1172 if (error < bestError)
1174 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1175 #pragma omp critical (DDS_CompressClusterFit)
1178 VectorCopy43(a,start);
1179 VectorCopy43(b,end);
1184 bestIteration = iterationIndex;
1191 VectorAdd(pointsWeights[k],part2,&part2);
1198 VectorAdd(pointsWeights[j],part1,&part1);
1203 if (bestIteration != iterationIndex)
1207 if (iterationIndex == 8)
1210 VectorSubtract3(*end,*start,&axis);
1211 if (ConstructOrdering(count,points,axis,pointsWeights,&xSumwSum,order,
1212 iterationIndex) == MagickFalse)
1216 o = order + (16*bestIteration);
1218 for (i=0; i < (ssize_t) besti; i++)
1219 unordered[o[i]] = 0;
1220 for (i=besti; i < (ssize_t) bestj; i++)
1221 unordered[o[i]] = 2;
1222 for (i=bestj; i < (ssize_t) bestk; i++)
1223 unordered[o[i]] = 3;
1224 for (i=bestk; i < (ssize_t) count; i++)
1225 unordered[o[i]] = 1;
1227 RemapIndices(map,unordered,indices);
1230 static void CompressRangeFit(const size_t count,
1231 const DDSVector4* points, const ssize_t *map, const DDSVector3 principle,
1232 const DDSVector4 metric, DDSVector3 *start, DDSVector3 *end,
1233 unsigned char *indices)
1259 VectorInit3(half,0.5f);
1265 gridrcp.x = 1.0f/31.0f;
1266 gridrcp.y = 1.0f/63.0f;
1267 gridrcp.z = 1.0f/31.0f;
1271 VectorCopy43(points[0],start);
1272 VectorCopy43(points[0],end);
1274 min = max = Dot(points[0],principle);
1275 for (i=1; i < (ssize_t) count; i++)
1277 val = Dot(points[i],principle);
1280 VectorCopy43(points[i],start);
1285 VectorCopy43(points[i],end);
1291 VectorClamp3(start);
1292 VectorMultiplyAdd3(grid,*start,half,start);
1293 VectorTruncate3(start);
1294 VectorMultiply3(*start,gridrcp,start);
1297 VectorMultiplyAdd3(grid,*end,half,end);
1298 VectorTruncate3(end);
1299 VectorMultiply3(*end,gridrcp,end);
1303 codes[2].x = (start->x * (2.0f/3.0f)) + (end->x * (1.0f/3.0f));
1304 codes[2].y = (start->y * (2.0f/3.0f)) + (end->y * (1.0f/3.0f));
1305 codes[2].z = (start->z * (2.0f/3.0f)) + (end->z * (1.0f/3.0f));
1306 codes[3].x = (start->x * (1.0f/3.0f)) + (end->x * (2.0f/3.0f));
1307 codes[3].y = (start->y * (1.0f/3.0f)) + (end->y * (2.0f/3.0f));
1308 codes[3].z = (start->z * (1.0f/3.0f)) + (end->z * (2.0f/3.0f));
1310 for (i=0; i < (ssize_t) count; i++)
1314 for (j=0; j < 4; j++)
1316 dist.x = (points[i].x - codes[j].x) * metric.x;
1317 dist.y = (points[i].y - codes[j].y) * metric.y;
1318 dist.z = (points[i].z - codes[j].z) * metric.z;
1328 closest[i] = (unsigned char) bestj;
1331 RemapIndices(map, closest, indices);
1334 static void ComputeEndPoints(const DDSSingleColourLookup *lookup[],
1335 const unsigned char *color, DDSVector3 *start, DDSVector3 *end,
1336 unsigned char *index)
1343 maxError = SIZE_MAX;
1345 for (i=0; i < 2; i++)
1347 const DDSSourceBlock*
1353 for (c=0; c < 3; c++)
1355 sources[c] = &lookup[c][color[c]].sources[i];
1356 error += ((size_t) sources[c]->error) * ((size_t) sources[c]->error);
1359 if (error > maxError)
1362 start->x = (float) sources[0]->start / 31.0f;
1363 start->y = (float) sources[1]->start / 63.0f;
1364 start->z = (float) sources[2]->start / 31.0f;
1366 end->x = (float) sources[0]->end / 31.0f;
1367 end->y = (float) sources[1]->end / 63.0f;
1368 end->z = (float) sources[2]->end / 31.0f;
1370 *index = (unsigned char) (2*i);
1375 static void ComputePrincipleComponent(const float *covariance,
1376 DDSVector3 *principle)
1387 row0.x = covariance[0];
1388 row0.y = covariance[1];
1389 row0.z = covariance[2];
1392 row1.x = covariance[1];
1393 row1.y = covariance[3];
1394 row1.z = covariance[4];
1397 row2.x = covariance[2];
1398 row2.y = covariance[4];
1399 row2.z = covariance[5];
1404 for (i=0; i < 8; i++)
1417 w.x = (row1.x * v.y) + w.x;
1418 w.y = (row1.y * v.y) + w.y;
1419 w.z = (row1.z * v.y) + w.z;
1420 w.w = (row1.w * v.y) + w.w;
1422 w.x = (row2.x * v.z) + w.x;
1423 w.y = (row2.y * v.z) + w.y;
1424 w.z = (row2.z * v.z) + w.z;
1425 w.w = (row2.w * v.z) + w.w;
1427 a = (float) PerceptibleReciprocal(MagickMax(w.x,MagickMax(w.y,w.z)));
1435 VectorCopy43(v,principle);
1438 static void ComputeWeightedCovariance(const size_t count,
1439 const DDSVector4 *points, float *covariance)
1451 VectorInit3(centroid,0.0f);
1453 for (i=0; i < count; i++)
1455 total += points[i].w;
1456 centroid.x += (points[i].x * points[i].w);
1457 centroid.y += (points[i].y * points[i].w);
1458 centroid.z += (points[i].z * points[i].w);
1461 if( total > 1.192092896e-07F)
1463 centroid.x /= total;
1464 centroid.y /= total;
1465 centroid.z /= total;
1468 for (i=0; i < 6; i++)
1469 covariance[i] = 0.0f;
1471 for (i = 0; i < count; i++)
1477 a.x = points[i].x - centroid.x;
1478 a.y = points[i].y - centroid.y;
1479 a.z = points[i].z - centroid.z;
1481 b.x = points[i].w * a.x;
1482 b.y = points[i].w * a.y;
1483 b.z = points[i].w * a.z;
1485 covariance[0] += a.x*b.x;
1486 covariance[1] += a.x*b.y;
1487 covariance[2] += a.x*b.z;
1488 covariance[3] += a.y*b.y;
1489 covariance[4] += a.y*b.z;
1490 covariance[5] += a.z*b.z;
1494 static MagickBooleanType ConstructOrdering(const size_t count,
1495 const DDSVector4 *points, const DDSVector3 axis, DDSVector4 *pointsWeights,
1496 DDSVector4 *xSumwSum, unsigned char *order, size_t iteration)
1513 o = order + (16*iteration);
1515 for (i=0; i < (ssize_t) count; i++)
1517 dps[i] = Dot(points[i],axis);
1518 o[i] = (unsigned char)i;
1521 for (i=0; i < (ssize_t) count; i++)
1523 for (j=i; j > 0 && dps[j] < dps[j - 1]; j--)
1526 dps[j] = dps[j - 1];
1535 for (i=0; i < (ssize_t) iteration; i++)
1543 for (j=0; j < count; j++)
1552 if (same != MagickFalse)
1561 for (i=0; i < (ssize_t) count; i++)
1568 v.x = points[j].w * points[j].x;
1569 v.y = points[j].w * points[j].y;
1570 v.z = points[j].w * points[j].z;
1571 v.w = points[j].w * 1.0f;
1573 VectorCopy44(v,&pointsWeights[i]);
1574 VectorAdd(*xSumwSum,v,xSumwSum);
1581 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1589 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1591 % IsDDS() returns MagickTrue if the image format type, identified by the
1592 % magick string, is DDS.
1594 % The format of the IsDDS method is:
1596 % MagickBooleanType IsDDS(const unsigned char *magick,const size_t length)
1598 % A description of each parameter follows:
1600 % o magick: compare image format pattern against these bytes.
1602 % o length: Specifies the length of the magick string.
1605 static MagickBooleanType IsDDS(const unsigned char *magick, const size_t length)
1608 return(MagickFalse);
1609 if (LocaleNCompare((char *) magick,"DDS ", 4) == 0)
1611 return(MagickFalse);
1614 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1618 % R e a d D D S I m a g e %
1622 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1624 % ReadDDSImage() reads a DirectDraw Surface image file and returns it. It
1625 % allocates the memory necessary for the new Image structure and returns a
1626 % pointer to the new image.
1628 % The format of the ReadDDSImage method is:
1630 % Image *ReadDDSImage(const ImageInfo *image_info,ExceptionInfo *exception)
1632 % A description of each parameter follows:
1634 % o image_info: The image info.
1636 % o exception: return any errors or warnings in this structure.
1640 static Image *ReadDDSImage(const ImageInfo *image_info,ExceptionInfo *exception)
1673 assert(image_info != (const ImageInfo *) NULL);
1674 assert(image_info->signature == MagickCoreSignature);
1675 if (image_info->debug != MagickFalse)
1676 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1677 image_info->filename);
1678 assert(exception != (ExceptionInfo *) NULL);
1679 assert(exception->signature == MagickCoreSignature);
1680 cubemap=MagickFalse,
1682 read_mipmaps=MagickFalse;
1683 image=AcquireImage(image_info,exception);
1684 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1685 if (status == MagickFalse)
1687 image=DestroyImageList(image);
1688 return((Image *) NULL);
1692 Initialize image structure.
1694 if (ReadDDSInfo(image, &dds_info) != MagickTrue)
1695 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1697 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP)
1698 cubemap = MagickTrue;
1700 if (dds_info.ddscaps2 & DDSCAPS2_VOLUME && dds_info.depth > 0)
1701 volume = MagickTrue;
1703 (void) SeekBlob(image, 128, SEEK_SET);
1706 Determine pixel format
1708 if (dds_info.pixelformat.flags & DDPF_RGB)
1710 compression = NoCompression;
1711 if (dds_info.pixelformat.flags & DDPF_ALPHAPIXELS)
1713 alpha_trait = BlendPixelTrait;
1714 decoder = ReadUncompressedRGBA;
1718 alpha_trait = UndefinedPixelTrait;
1719 decoder = ReadUncompressedRGB;
1722 else if (dds_info.pixelformat.flags & DDPF_LUMINANCE)
1724 compression = NoCompression;
1725 if (dds_info.pixelformat.flags & DDPF_ALPHAPIXELS)
1727 /* Not sure how to handle this */
1728 ThrowReaderException(CorruptImageError, "ImageTypeNotSupported");
1732 alpha_trait = UndefinedPixelTrait;
1733 decoder = ReadUncompressedRGB;
1736 else if (dds_info.pixelformat.flags & DDPF_FOURCC)
1738 switch (dds_info.pixelformat.fourcc)
1742 alpha_trait = UndefinedPixelTrait;
1743 compression = DXT1Compression;
1749 alpha_trait = BlendPixelTrait;
1750 compression = DXT3Compression;
1756 alpha_trait = BlendPixelTrait;
1757 compression = DXT5Compression;
1763 /* Unknown FOURCC */
1764 ThrowReaderException(CorruptImageError, "ImageTypeNotSupported");
1770 /* Neither compressed nor uncompressed... thus unsupported */
1771 ThrowReaderException(CorruptImageError, "ImageTypeNotSupported");
1778 Determine number of faces defined in the cubemap
1781 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_POSITIVEX) num_images++;
1782 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_NEGATIVEX) num_images++;
1783 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_POSITIVEY) num_images++;
1784 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_NEGATIVEY) num_images++;
1785 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_POSITIVEZ) num_images++;
1786 if (dds_info.ddscaps2 & DDSCAPS2_CUBEMAP_NEGATIVEZ) num_images++;
1790 num_images = dds_info.depth;
1792 if ((num_images == 0) || (num_images > GetBlobSize(image)))
1793 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1795 if (AcquireMagickResource(ListLengthResource,num_images) == MagickFalse)
1796 ThrowReaderException(ResourceLimitError,"ListLengthExceedsLimit");
1798 option=GetImageOption(image_info,"dds:skip-mipmaps");
1799 if (IsStringFalse(option) != MagickFalse)
1800 read_mipmaps=MagickTrue;
1802 for (n = 0; n < num_images; n++)
1806 /* Start a new image */
1807 if (EOFBlob(image) != MagickFalse)
1808 ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
1809 AcquireNextImage(image_info,image,exception);
1810 if (GetNextImageInList(image) == (Image *) NULL)
1811 return(DestroyImageList(image));
1812 image=SyncNextImageInList(image);
1815 image->alpha_trait=alpha_trait;
1816 image->compression=compression;
1817 image->columns=dds_info.width;
1818 image->rows=dds_info.height;
1819 image->storage_class=DirectClass;
1820 image->endian=LSBEndian;
1822 if (image_info->ping != MagickFalse)
1824 (void) CloseBlob(image);
1825 return(GetFirstImageInList(image));
1827 status=SetImageExtent(image,image->columns,image->rows,exception);
1828 if (status == MagickFalse)
1829 return(DestroyImageList(image));
1830 (void) SetImageBackgroundColor(image,exception);
1831 status=(decoder)(image_info,image,&dds_info,read_mipmaps,exception);
1832 if (status == MagickFalse)
1834 (void) CloseBlob(image);
1835 return(GetFirstImageInList(image));
1838 (void) CloseBlob(image);
1839 return(GetFirstImageInList(image));
1842 static MagickBooleanType ReadDDSInfo(Image *image, DDSInfo *dds_info)
1848 /* Seek to start of header */
1849 (void) SeekBlob(image, 4, SEEK_SET);
1851 /* Check header field */
1852 hdr_size = ReadBlobLSBLong(image);
1853 if (hdr_size != 124)
1856 /* Fill in DDS info struct */
1857 dds_info->flags = ReadBlobLSBLong(image);
1859 /* Check required flags */
1860 required=(size_t) (DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT);
1861 if ((dds_info->flags & required) != required)
1864 dds_info->height = ReadBlobLSBLong(image);
1865 dds_info->width = ReadBlobLSBLong(image);
1866 dds_info->pitchOrLinearSize = ReadBlobLSBLong(image);
1867 dds_info->depth = ReadBlobLSBLong(image);
1868 dds_info->mipmapcount = ReadBlobLSBLong(image);
1870 (void) SeekBlob(image, 44, SEEK_CUR); /* reserved region of 11 DWORDs */
1872 /* Read pixel format structure */
1873 hdr_size = ReadBlobLSBLong(image);
1877 dds_info->pixelformat.flags = ReadBlobLSBLong(image);
1878 dds_info->pixelformat.fourcc = ReadBlobLSBLong(image);
1879 dds_info->pixelformat.rgb_bitcount = ReadBlobLSBLong(image);
1880 dds_info->pixelformat.r_bitmask = ReadBlobLSBLong(image);
1881 dds_info->pixelformat.g_bitmask = ReadBlobLSBLong(image);
1882 dds_info->pixelformat.b_bitmask = ReadBlobLSBLong(image);
1883 dds_info->pixelformat.alpha_bitmask = ReadBlobLSBLong(image);
1885 dds_info->ddscaps1 = ReadBlobLSBLong(image);
1886 dds_info->ddscaps2 = ReadBlobLSBLong(image);
1887 (void) SeekBlob(image, 12, SEEK_CUR); /* 3 reserved DWORDs */
1892 static MagickBooleanType SetDXT1Pixels(Image *image,ssize_t x,ssize_t y,
1893 DDSColors colors,size_t bits,Quantum *q)
1904 for (j = 0; j < 4; j++)
1906 for (i = 0; i < 4; i++)
1908 if ((x + i) < (ssize_t) image->columns &&
1909 (y + j) < (ssize_t) image->rows)
1911 code=(unsigned char) ((bits >> ((j*4+i)*2)) & 0x3);
1912 SetPixelRed(image,ScaleCharToQuantum(colors.r[code]),q);
1913 SetPixelGreen(image,ScaleCharToQuantum(colors.g[code]),q);
1914 SetPixelBlue(image,ScaleCharToQuantum(colors.b[code]),q);
1915 SetPixelOpacity(image,ScaleCharToQuantum(colors.a[code]),q);
1916 if ((colors.a[code] != 0) &&
1917 (image->alpha_trait == UndefinedPixelTrait))
1918 return(MagickFalse);
1919 q+=GetPixelChannels(image);
1926 static MagickBooleanType ReadMipmaps(const ImageInfo *image_info,Image *image,
1927 DDSInfo *dds_info,DDSPixelDecoder decoder,ExceptionInfo *exception)
1933 Only skip mipmaps for textures and cube maps
1935 if (EOFBlob(image) != MagickFalse)
1937 ThrowFileException(exception,CorruptImageWarning,"UnexpectedEndOfFile",
1939 return(MagickFalse);
1942 if (dds_info->ddscaps1 & DDSCAPS_MIPMAP
1943 && (dds_info->ddscaps1 & DDSCAPS_TEXTURE
1944 || dds_info->ddscaps2 & DDSCAPS2_CUBEMAP))
1953 w=DIV2(dds_info->width);
1954 h=DIV2(dds_info->height);
1957 Mipmapcount includes the main image, so start from one
1959 for (i = 1; (i < (ssize_t) dds_info->mipmapcount) && w && h; i++)
1961 AcquireNextImage(image_info,image,exception);
1962 if (GetNextImageInList(image) == (Image *) NULL)
1963 return(MagickFalse);
1964 image=SyncNextImageInList(image);
1965 status=SetImageExtent(image,w,h,exception);
1966 if (status == MagickFalse)
1968 status=decoder(image,dds_info,exception);
1969 if (status == MagickFalse)
1971 if ((w == 1) && (h == 1))
1981 static MagickBooleanType ReadDXT1Pixels(Image *image,
1982 DDSInfo *magick_unused(dds_info),ExceptionInfo *exception)
2003 magick_unreferenced(dds_info);
2004 for (y = 0; y < (ssize_t) image->rows; y += 4)
2006 for (x = 0; x < (ssize_t) image->columns; x += 4)
2008 /* Get 4x4 patch of pixels to write on */
2009 q=QueueAuthenticPixels(image,x,y,MagickMin(4,image->columns-x),
2010 MagickMin(4,image->rows-y),exception);
2012 if (q == (Quantum *) NULL)
2013 return(MagickFalse);
2015 /* Read 8 bytes of data from the image */
2016 c0=ReadBlobLSBShort(image);
2017 c1=ReadBlobLSBShort(image);
2018 bits=ReadBlobLSBLong(image);
2020 CalculateColors(c0,c1,&colors,MagickFalse);
2021 if (EOFBlob(image) != MagickFalse)
2022 return(MagickFalse);
2024 /* Write the pixels */
2025 if (SetDXT1Pixels(image,x,y,colors,bits,q) == MagickFalse)
2028 SetImageAlpha(image,QuantumRange,exception);
2029 q=QueueAuthenticPixels(image,x,y,MagickMin(4,image->columns-x),
2030 MagickMin(4,image->rows-y),exception);
2031 if (q != (Quantum *) NULL)
2032 SetDXT1Pixels(image,x,y,colors,bits,q);
2034 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2035 return(MagickFalse);
2037 if (EOFBlob(image) != MagickFalse)
2038 return(MagickFalse);
2043 static MagickBooleanType ReadDXT1(const ImageInfo *image_info,Image *image,
2044 DDSInfo *dds_info,const MagickBooleanType read_mipmaps,
2045 ExceptionInfo *exception)
2047 if (ReadDXT1Pixels(image,dds_info,exception) == MagickFalse)
2048 return(MagickFalse);
2050 if (read_mipmaps != MagickFalse)
2051 return(ReadMipmaps(image_info,image,dds_info,ReadDXT1Pixels,exception));
2053 return(SkipDXTMipmaps(image,dds_info,8,exception));
2056 static MagickBooleanType ReadDXT3Pixels(Image *image,
2057 DDSInfo *magick_unused(dds_info),ExceptionInfo *exception)
2086 magick_unreferenced(dds_info);
2087 for (y = 0; y < (ssize_t) image->rows; y += 4)
2089 for (x = 0; x < (ssize_t) image->columns; x += 4)
2091 /* Get 4x4 patch of pixels to write on */
2092 q = QueueAuthenticPixels(image, x, y, MagickMin(4, image->columns - x),
2093 MagickMin(4, image->rows - y),exception);
2095 if (q == (Quantum *) NULL)
2096 return(MagickFalse);
2098 /* Read alpha values (8 bytes) */
2099 a0 = ReadBlobLSBLong(image);
2100 a1 = ReadBlobLSBLong(image);
2102 /* Read 8 bytes of data from the image */
2103 c0 = ReadBlobLSBShort(image);
2104 c1 = ReadBlobLSBShort(image);
2105 bits = ReadBlobLSBLong(image);
2107 CalculateColors(c0, c1, &colors, MagickTrue);
2109 if (EOFBlob(image) != MagickFalse)
2110 return(MagickFalse);
2112 /* Write the pixels */
2113 for (j = 0; j < 4; j++)
2115 for (i = 0; i < 4; i++)
2117 if ((x + i) < (ssize_t) image->columns && (y + j) < (ssize_t) image->rows)
2119 code = (bits >> ((4*j+i)*2)) & 0x3;
2120 SetPixelRed(image,ScaleCharToQuantum(colors.r[code]),q);
2121 SetPixelGreen(image,ScaleCharToQuantum(colors.g[code]),q);
2122 SetPixelBlue(image,ScaleCharToQuantum(colors.b[code]),q);
2124 Extract alpha value: multiply 0..15 by 17 to get range 0..255
2127 alpha = 17U * (unsigned char) ((a0 >> (4*(4*j+i))) & 0xf);
2129 alpha = 17U * (unsigned char) ((a1 >> (4*(4*(j-2)+i))) & 0xf);
2130 SetPixelAlpha(image,ScaleCharToQuantum((unsigned char) alpha),q);
2131 q+=GetPixelChannels(image);
2135 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2136 return(MagickFalse);
2138 if (EOFBlob(image) != MagickFalse)
2139 return(MagickFalse);
2144 static MagickBooleanType ReadDXT3(const ImageInfo *image_info,Image *image,
2145 DDSInfo *dds_info,const MagickBooleanType read_mipmaps,
2146 ExceptionInfo *exception)
2148 if (ReadDXT3Pixels(image,dds_info,exception) == MagickFalse)
2149 return(MagickFalse);
2151 if (read_mipmaps != MagickFalse)
2152 return(ReadMipmaps(image_info,image,dds_info,ReadDXT3Pixels,exception));
2154 return(SkipDXTMipmaps(image,dds_info,16,exception));
2157 static MagickBooleanType ReadDXT5Pixels(Image *image,
2158 DDSInfo *magick_unused(dds_info),ExceptionInfo *exception)
2191 magick_unreferenced(dds_info);
2192 for (y = 0; y < (ssize_t) image->rows; y += 4)
2194 for (x = 0; x < (ssize_t) image->columns; x += 4)
2196 /* Get 4x4 patch of pixels to write on */
2197 q = QueueAuthenticPixels(image, x, y, MagickMin(4, image->columns - x),
2198 MagickMin(4, image->rows - y),exception);
2200 if (q == (Quantum *) NULL)
2201 return(MagickFalse);
2203 /* Read alpha values (8 bytes) */
2204 a0 = (unsigned char) ReadBlobByte(image);
2205 a1 = (unsigned char) ReadBlobByte(image);
2207 alpha_bits = (MagickSizeType)ReadBlobLSBLong(image);
2208 alpha_bits = alpha_bits | ((MagickSizeType)ReadBlobLSBShort(image) << 32);
2210 /* Read 8 bytes of data from the image */
2211 c0 = ReadBlobLSBShort(image);
2212 c1 = ReadBlobLSBShort(image);
2213 bits = ReadBlobLSBLong(image);
2215 CalculateColors(c0, c1, &colors, MagickTrue);
2216 if (EOFBlob(image) != MagickFalse)
2217 return(MagickFalse);
2219 /* Write the pixels */
2220 for (j = 0; j < 4; j++)
2222 for (i = 0; i < 4; i++)
2224 if ((x + i) < (ssize_t) image->columns &&
2225 (y + j) < (ssize_t) image->rows)
2227 code = (bits >> ((4*j+i)*2)) & 0x3;
2228 SetPixelRed(image,ScaleCharToQuantum(colors.r[code]),q);
2229 SetPixelGreen(image,ScaleCharToQuantum(colors.g[code]),q);
2230 SetPixelBlue(image,ScaleCharToQuantum(colors.b[code]),q);
2231 /* Extract alpha value */
2232 alpha_code = (size_t) (alpha_bits >> (3*(4*j+i))) & 0x7;
2233 if (alpha_code == 0)
2235 else if (alpha_code == 1)
2238 alpha = ((8-alpha_code) * a0 + (alpha_code-1) * a1) / 7;
2239 else if (alpha_code == 6)
2241 else if (alpha_code == 7)
2244 alpha = (((6-alpha_code) * a0 + (alpha_code-1) * a1) / 5);
2245 SetPixelAlpha(image,ScaleCharToQuantum((unsigned char) alpha),q);
2246 q+=GetPixelChannels(image);
2250 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2251 return(MagickFalse);
2253 if (EOFBlob(image) != MagickFalse)
2254 return(MagickFalse);
2259 static MagickBooleanType ReadDXT5(const ImageInfo *image_info,Image *image,
2260 DDSInfo *dds_info,const MagickBooleanType read_mipmaps,
2261 ExceptionInfo *exception)
2263 if (ReadDXT5Pixels(image,dds_info,exception) == MagickFalse)
2264 return(MagickFalse);
2266 if (read_mipmaps != MagickFalse)
2267 return(ReadMipmaps(image_info,image,dds_info,ReadDXT5Pixels,exception));
2269 return(SkipDXTMipmaps(image,dds_info,16,exception));
2272 static MagickBooleanType ReadUncompressedRGBPixels(Image *image,
2273 DDSInfo *dds_info,ExceptionInfo *exception)
2284 for (y = 0; y < (ssize_t) image->rows; y++)
2286 q = QueueAuthenticPixels(image, 0, y, image->columns, 1,exception);
2288 if (q == (Quantum *) NULL)
2289 return(MagickFalse);
2291 for (x = 0; x < (ssize_t) image->columns; x++)
2293 if (dds_info->pixelformat.rgb_bitcount == 8)
2294 SetPixelGray(image,ScaleCharToQuantum(ReadBlobByte(image)),q);
2295 else if (dds_info->pixelformat.rgb_bitcount == 16)
2297 color=ReadBlobShort(image);
2298 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
2299 (((color >> 11)/31.0)*255)),q);
2300 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
2301 ((((unsigned short)(color << 5) >> 10)/63.0)*255)),q);
2302 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
2303 ((((unsigned short)(color << 11) >> 11)/31.0)*255)),q);
2307 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
2308 ReadBlobByte(image)),q);
2309 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
2310 ReadBlobByte(image)),q);
2311 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
2312 ReadBlobByte(image)),q);
2313 if (dds_info->pixelformat.rgb_bitcount == 32)
2314 (void) ReadBlobByte(image);
2316 q+=GetPixelChannels(image);
2318 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2319 return(MagickFalse);
2320 if (EOFBlob(image) != MagickFalse)
2321 return(MagickFalse);
2326 static MagickBooleanType ReadUncompressedRGB(const ImageInfo *image_info,
2327 Image *image,DDSInfo *dds_info,const MagickBooleanType read_mipmaps,
2328 ExceptionInfo *exception)
2330 if (dds_info->pixelformat.rgb_bitcount == 8)
2331 (void) SetImageType(image,GrayscaleType,exception);
2332 else if (dds_info->pixelformat.rgb_bitcount == 16 && !IsBitMask(
2333 dds_info->pixelformat,0xf800,0x07e0,0x001f,0x0000))
2334 ThrowBinaryException(CorruptImageError,"ImageTypeNotSupported",
2337 if (ReadUncompressedRGBPixels(image,dds_info,exception) == MagickFalse)
2338 return(MagickFalse);
2340 if (read_mipmaps != MagickFalse)
2341 return(ReadMipmaps(image_info,image,dds_info,ReadUncompressedRGBPixels,
2344 return(SkipRGBMipmaps(image,dds_info,3,exception));
2347 static MagickBooleanType ReadUncompressedRGBAPixels(Image *image,
2348 DDSInfo *dds_info,ExceptionInfo *exception)
2362 if (dds_info->pixelformat.rgb_bitcount == 16)
2364 if (IsBitMask(dds_info->pixelformat,0x7c00,0x03e0,0x001f,0x8000))
2366 else if (IsBitMask(dds_info->pixelformat,0x00ff,0x00ff,0x00ff,0xff00))
2369 (void) SetImageType(image,GrayscaleAlphaType,exception);
2371 else if (IsBitMask(dds_info->pixelformat,0x0f00,0x00f0,0x000f,0xf000))
2374 ThrowBinaryException(CorruptImageError,"ImageTypeNotSupported",
2378 for (y = 0; y < (ssize_t) image->rows; y++)
2380 q = QueueAuthenticPixels(image, 0, y, image->columns, 1,exception);
2382 if (q == (Quantum *) NULL)
2383 return(MagickFalse);
2385 for (x = 0; x < (ssize_t) image->columns; x++)
2387 if (dds_info->pixelformat.rgb_bitcount == 16)
2389 color=ReadBlobShort(image);
2392 SetPixelAlpha(image,(color & (1 << 15)) ? QuantumRange : 0,q);
2393 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
2394 ((((unsigned short)(color << 1) >> 11)/31.0)*255)),q);
2395 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
2396 ((((unsigned short)(color << 6) >> 11)/31.0)*255)),q);
2397 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
2398 ((((unsigned short)(color << 11) >> 11)/31.0)*255)),q);
2400 else if (alphaBits == 2)
2402 SetPixelAlpha(image,ScaleCharToQuantum((unsigned char)
2404 SetPixelGray(image,ScaleCharToQuantum((unsigned char)color),q);
2408 SetPixelAlpha(image,ScaleCharToQuantum((unsigned char)
2409 (((color >> 12)/15.0)*255)),q);
2410 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
2411 ((((unsigned short)(color << 4) >> 12)/15.0)*255)),q);
2412 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
2413 ((((unsigned short)(color << 8) >> 12)/15.0)*255)),q);
2414 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
2415 ((((unsigned short)(color << 12) >> 12)/15.0)*255)),q);
2420 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
2421 ReadBlobByte(image)),q);
2422 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
2423 ReadBlobByte(image)),q);
2424 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
2425 ReadBlobByte(image)),q);
2426 SetPixelAlpha(image,ScaleCharToQuantum((unsigned char)
2427 ReadBlobByte(image)),q);
2429 q+=GetPixelChannels(image);
2431 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2432 return(MagickFalse);
2433 if (EOFBlob(image) != MagickFalse)
2434 return(MagickFalse);
2439 static MagickBooleanType ReadUncompressedRGBA(const ImageInfo *image_info,
2440 Image *image,DDSInfo *dds_info,const MagickBooleanType read_mipmaps,
2441 ExceptionInfo *exception)
2443 if (ReadUncompressedRGBAPixels(image,dds_info,exception) == MagickFalse)
2444 return(MagickFalse);
2446 if (read_mipmaps != MagickFalse)
2447 return(ReadMipmaps(image_info,image,dds_info,ReadUncompressedRGBAPixels,
2450 return(SkipRGBMipmaps(image,dds_info,4,exception));
2454 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2458 % R e g i s t e r D D S I m a g e %
2462 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2464 % RegisterDDSImage() adds attributes for the DDS image format to
2465 % the list of supported formats. The attributes include the image format
2466 % tag, a method to read and/or write the format, whether the format
2467 % supports the saving of more than one frame to the same file or blob,
2468 % whether the format supports native in-memory I/O, and a brief
2469 % description of the format.
2471 % The format of the RegisterDDSImage method is:
2473 % RegisterDDSImage(void)
2476 ModuleExport size_t RegisterDDSImage(void)
2481 entry = AcquireMagickInfo("DDS","DDS","Microsoft DirectDraw Surface");
2482 entry->decoder = (DecodeImageHandler *) ReadDDSImage;
2483 entry->encoder = (EncodeImageHandler *) WriteDDSImage;
2484 entry->magick = (IsImageFormatHandler *) IsDDS;
2485 entry->flags|=CoderDecoderSeekableStreamFlag;
2486 (void) RegisterMagickInfo(entry);
2487 entry = AcquireMagickInfo("DDS","DXT1","Microsoft DirectDraw Surface");
2488 entry->decoder = (DecodeImageHandler *) ReadDDSImage;
2489 entry->encoder = (EncodeImageHandler *) WriteDDSImage;
2490 entry->magick = (IsImageFormatHandler *) IsDDS;
2491 entry->flags|=CoderDecoderSeekableStreamFlag;
2492 (void) RegisterMagickInfo(entry);
2493 entry = AcquireMagickInfo("DDS","DXT5","Microsoft DirectDraw Surface");
2494 entry->decoder = (DecodeImageHandler *) ReadDDSImage;
2495 entry->encoder = (EncodeImageHandler *) WriteDDSImage;
2496 entry->magick = (IsImageFormatHandler *) IsDDS;
2497 entry->flags|=CoderDecoderSeekableStreamFlag;
2498 (void) RegisterMagickInfo(entry);
2499 return(MagickImageCoderSignature);
2502 static void RemapIndices(const ssize_t *map, const unsigned char *source,
2503 unsigned char *target)
2508 for (i = 0; i < 16; i++)
2513 target[i] = source[map[i]];
2518 Skip the mipmap images for compressed (DXTn) dds files
2520 static MagickBooleanType SkipDXTMipmaps(Image *image,DDSInfo *dds_info,
2521 int texel_size,ExceptionInfo *exception)
2524 Only skip mipmaps for textures and cube maps
2526 if (EOFBlob(image) != MagickFalse)
2528 ThrowFileException(exception,CorruptImageWarning,"UnexpectedEndOfFile",
2530 return(MagickFalse);
2532 if (dds_info->ddscaps1 & DDSCAPS_MIPMAP
2533 && (dds_info->ddscaps1 & DDSCAPS_TEXTURE
2534 || dds_info->ddscaps2 & DDSCAPS2_CUBEMAP))
2546 w=DIV2(dds_info->width);
2547 h=DIV2(dds_info->height);
2550 Mipmapcount includes the main image, so start from one
2552 for (i = 1; (i < (ssize_t) dds_info->mipmapcount) && w && h; i++)
2554 offset=(MagickOffsetType)((w+3)/4)*((h+3)/4)*texel_size;
2555 if (SeekBlob(image,offset,SEEK_CUR) < 0)
2559 if ((w == 1) && (h == 1))
2567 Skip the mipmap images for uncompressed (RGB or RGBA) dds files
2569 static MagickBooleanType SkipRGBMipmaps(Image *image,DDSInfo *dds_info,
2570 int pixel_size,ExceptionInfo *exception)
2573 Only skip mipmaps for textures and cube maps
2575 if (EOFBlob(image) != MagickFalse)
2577 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
2579 return(MagickFalse);
2581 if (dds_info->ddscaps1 & DDSCAPS_MIPMAP
2582 && (dds_info->ddscaps1 & DDSCAPS_TEXTURE
2583 || dds_info->ddscaps2 & DDSCAPS2_CUBEMAP))
2595 w=DIV2(dds_info->width);
2596 h=DIV2(dds_info->height);
2599 Mipmapcount includes the main image, so start from one
2601 for (i=1; (i < (ssize_t) dds_info->mipmapcount) && w && h; i++)
2603 offset=(MagickOffsetType)w*h*pixel_size;
2604 if (SeekBlob(image,offset,SEEK_CUR) < 0)
2608 if ((w == 1) && (h == 1))
2616 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2620 % U n r e g i s t e r D D S I m a g e %
2624 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2626 % UnregisterDDSImage() removes format registrations made by the
2627 % DDS module from the list of supported formats.
2629 % The format of the UnregisterDDSImage method is:
2631 % UnregisterDDSImage(void)
2634 ModuleExport void UnregisterDDSImage(void)
2636 (void) UnregisterMagickInfo("DDS");
2637 (void) UnregisterMagickInfo("DXT1");
2638 (void) UnregisterMagickInfo("DXT5");
2641 static void WriteAlphas(Image *image, const ssize_t *alphas, size_t min5,
2642 size_t max5, size_t min7, size_t max7)
2656 FixRange(min5,max5,5);
2657 err5 = CompressAlpha(min5,max5,5,alphas,indices5);
2659 FixRange(min7,max7,7);
2660 err7 = CompressAlpha(min7,max7,7,alphas,indices7);
2664 for (i=0; i < 16; i++)
2669 index = indices7[i];
2672 else if (index == 1)
2675 indices5[i] = 9 - index;
2682 (void) WriteBlobByte(image,(unsigned char) min5);
2683 (void) WriteBlobByte(image,(unsigned char) max5);
2685 for(i=0; i < 2; i++)
2690 for (j=0; j < 8; j++)
2692 size_t index = (size_t) indices5[j + i*8];
2693 value |= ( index << 3*j );
2696 for (j=0; j < 3; j++)
2698 size_t byte = (value >> 8*j) & 0xff;
2699 (void) WriteBlobByte(image,(unsigned char) byte);
2704 static void WriteCompressed(Image *image, const size_t count,
2705 DDSVector4 *points, const ssize_t *map, const MagickBooleanType clusterFit)
2721 VectorInit(metric,1.0f);
2722 VectorInit3(start,0.0f);
2723 VectorInit3(end,0.0f);
2725 ComputeWeightedCovariance(count,points,covariance);
2726 ComputePrincipleComponent(covariance,&principle);
2728 if ((clusterFit == MagickFalse) || (count == 0))
2729 CompressRangeFit(count,points,map,principle,metric,&start,&end,indices);
2731 CompressClusterFit(count,points,map,principle,metric,&start,&end,indices);
2733 WriteIndices(image,start,end,indices);
2737 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2741 % W r i t e D D S I m a g e %
2745 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2747 % WriteDDSImage() writes a DirectDraw Surface image file in the DXT5 format.
2749 % The format of the WriteBMPImage method is:
2751 % MagickBooleanType WriteDDSImage(const ImageInfo *image_info,Image *image)
2753 % A description of each parameter follows.
2755 % o image_info: the image info.
2757 % o image: The image.
2760 static MagickBooleanType WriteDDSImage(const ImageInfo *image_info,
2761 Image *image, ExceptionInfo *exception)
2780 assert(image_info != (const ImageInfo *) NULL);
2781 assert(image_info->signature == MagickCoreSignature);
2782 assert(image != (Image *) NULL);
2783 assert(image->signature == MagickCoreSignature);
2784 if (image->debug != MagickFalse)
2785 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2786 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
2787 if (status == MagickFalse)
2789 (void) TransformImageColorspace(image,sRGBColorspace,exception);
2790 pixelFormat=DDPF_FOURCC;
2791 compression=FOURCC_DXT5;
2793 if (image->alpha_trait == UndefinedPixelTrait)
2794 compression=FOURCC_DXT1;
2796 if (LocaleCompare(image_info->magick,"dxt1") == 0)
2797 compression=FOURCC_DXT1;
2799 option=GetImageOption(image_info,"dds:compression");
2800 if (option != (char *) NULL)
2802 if (LocaleCompare(option,"dxt1") == 0)
2803 compression=FOURCC_DXT1;
2804 if (LocaleCompare(option,"none") == 0)
2805 pixelFormat=DDPF_RGB;
2808 clusterFit=MagickFalse;
2809 weightByAlpha=MagickFalse;
2811 if (pixelFormat == DDPF_FOURCC)
2813 option=GetImageOption(image_info,"dds:cluster-fit");
2814 if (IsStringTrue(option) != MagickFalse)
2816 clusterFit=MagickTrue;
2817 if (compression != FOURCC_DXT1)
2819 option=GetImageOption(image_info,"dds:weight-by-alpha");
2820 if (IsStringTrue(option) != MagickFalse)
2821 weightByAlpha=MagickTrue;
2827 fromlist=MagickFalse;
2828 option=GetImageOption(image_info,"dds:mipmaps");
2829 if (option != (char *) NULL)
2831 if (LocaleNCompare(option,"fromlist",8) == 0)
2836 fromlist=MagickTrue;
2838 while(next != (Image *) NULL)
2846 if ((mipmaps == 0) &&
2847 ((image->columns & (image->columns - 1)) == 0) &&
2848 ((image->rows & (image->rows - 1)) == 0))
2850 maxMipmaps=SIZE_MAX;
2851 if (option != (char *) NULL)
2852 maxMipmaps=StringToUnsignedLong(option);
2854 if (maxMipmaps != 0)
2856 columns=image->columns;
2858 while ((columns != 1 || rows != 1) && mipmaps != maxMipmaps)
2860 columns=DIV2(columns);
2867 WriteDDSInfo(image,pixelFormat,compression,mipmaps);
2869 WriteImageData(image,pixelFormat,compression,clusterFit,weightByAlpha,
2872 if ((mipmaps > 0) && (WriteMipmaps(image,image_info,pixelFormat,compression,
2873 mipmaps,fromlist,clusterFit,weightByAlpha,exception) == MagickFalse))
2874 return(MagickFalse);
2876 (void) CloseBlob(image);
2880 static void WriteDDSInfo(Image *image, const size_t pixelFormat,
2881 const size_t compression, const size_t mipmaps)
2884 software[MagickPathExtent];
2894 flags=(unsigned int) (DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT |
2896 caps=(unsigned int) DDSCAPS_TEXTURE;
2897 format=(unsigned int) pixelFormat;
2899 if (format == DDPF_FOURCC)
2900 flags=flags | DDSD_LINEARSIZE;
2902 flags=flags | DDSD_PITCH;
2906 flags=flags | (unsigned int) DDSD_MIPMAPCOUNT;
2907 caps=caps | (unsigned int) (DDSCAPS_MIPMAP | DDSCAPS_COMPLEX);
2910 if (format != DDPF_FOURCC && image->alpha_trait != UndefinedPixelTrait)
2911 format=format | DDPF_ALPHAPIXELS;
2913 (void) WriteBlob(image,4,(unsigned char *) "DDS ");
2914 (void) WriteBlobLSBLong(image,124);
2915 (void) WriteBlobLSBLong(image,flags);
2916 (void) WriteBlobLSBLong(image,(unsigned int) image->rows);
2917 (void) WriteBlobLSBLong(image,(unsigned int) image->columns);
2919 if (pixelFormat == DDPF_FOURCC)
2921 /* Compressed DDS requires linear compressed size of first image */
2922 if (compression == FOURCC_DXT1)
2923 (void) WriteBlobLSBLong(image,(unsigned int) (MagickMax(1,
2924 (image->columns+3)/4)*MagickMax(1,(image->rows+3)/4)*8));
2926 (void) WriteBlobLSBLong(image,(unsigned int) (MagickMax(1,
2927 (image->columns+3)/4)*MagickMax(1,(image->rows+3)/4)*16));
2931 /* Uncompressed DDS requires byte pitch of first image */
2932 if (image->alpha_trait != UndefinedPixelTrait)
2933 (void) WriteBlobLSBLong(image,(unsigned int) (image->columns * 4));
2935 (void) WriteBlobLSBLong(image,(unsigned int) (image->columns * 3));
2938 (void) WriteBlobLSBLong(image,0x00);
2939 (void) WriteBlobLSBLong(image,(unsigned int) mipmaps+1);
2940 (void) memset(software,0,sizeof(software));
2941 (void) CopyMagickString(software,"IMAGEMAGICK",MagickPathExtent);
2942 (void) WriteBlob(image,44,(unsigned char *) software);
2944 (void) WriteBlobLSBLong(image,32);
2945 (void) WriteBlobLSBLong(image,format);
2947 if (pixelFormat == DDPF_FOURCC)
2949 (void) WriteBlobLSBLong(image,(unsigned int) compression);
2950 for(i=0;i < 5;i++) /* bitcount / masks */
2951 (void) WriteBlobLSBLong(image,0x00);
2955 (void) WriteBlobLSBLong(image,0x00);
2956 if (image->alpha_trait != UndefinedPixelTrait)
2958 (void) WriteBlobLSBLong(image,32);
2959 (void) WriteBlobLSBLong(image,0xff0000);
2960 (void) WriteBlobLSBLong(image,0xff00);
2961 (void) WriteBlobLSBLong(image,0xff);
2962 (void) WriteBlobLSBLong(image,0xff000000);
2966 (void) WriteBlobLSBLong(image,24);
2967 (void) WriteBlobLSBLong(image,0xff0000);
2968 (void) WriteBlobLSBLong(image,0xff00);
2969 (void) WriteBlobLSBLong(image,0xff);
2970 (void) WriteBlobLSBLong(image,0x00);
2974 (void) WriteBlobLSBLong(image,caps);
2975 for(i=0;i < 4;i++) /* ddscaps2 + reserved region */
2976 (void) WriteBlobLSBLong(image,0x00);
2979 static void WriteFourCC(Image *image, const size_t compression,
2980 const MagickBooleanType clusterFit, const MagickBooleanType weightByAlpha,
2981 ExceptionInfo *exception)
2992 register const Quantum
2995 for (y=0; y < (ssize_t) image->rows; y+=4)
2997 for (x=0; x < (ssize_t) image->columns; x+=4)
3022 if (x + columns >= image->columns)
3023 columns = image->columns - x;
3025 if (y + rows >= image->rows)
3026 rows = image->rows - y;
3028 p=GetVirtualPixels(image,x,y,columns,rows,exception);
3029 if (p == (const Quantum *) NULL)
3032 for (i=0; i<16; i++)
3038 for (by=0; by < (ssize_t) rows; by++)
3040 for (bx=0; bx < (ssize_t) columns; bx++)
3042 if (compression == FOURCC_DXT5)
3043 alpha = ScaleQuantumToChar(GetPixelAlpha(image,p));
3047 if (compression == FOURCC_DXT5)
3053 if (alpha != 0 && alpha < min5)
3055 if (alpha != 255 && alpha > max5)
3059 alphas[4*by + bx] = (size_t)alpha;
3061 point.x = (float)ScaleQuantumToChar(GetPixelRed(image,p)) / 255.0f;
3062 point.y = (float)ScaleQuantumToChar(GetPixelGreen(image,p)) / 255.0f;
3063 point.z = (float)ScaleQuantumToChar(GetPixelBlue(image,p)) / 255.0f;
3064 point.w = weightByAlpha ? (float)(alpha + 1) / 256.0f : 1.0f;
3065 p+=GetPixelChannels(image);
3067 match = MagickFalse;
3068 for (i=0; i < (ssize_t) count; i++)
3070 if ((points[i].x == point.x) &&
3071 (points[i].y == point.y) &&
3072 (points[i].z == point.z) &&
3073 (alpha >= 128 || compression == FOURCC_DXT5))
3075 points[i].w += point.w;
3082 if (match != MagickFalse)
3085 points[count].x = point.x;
3086 points[count].y = point.y;
3087 points[count].z = point.z;
3088 points[count].w = point.w;
3089 map[4*by + bx] = count;
3094 for (i=0; i < (ssize_t) count; i++)
3095 points[i].w = sqrt(points[i].w);
3097 if (compression == FOURCC_DXT5)
3098 WriteAlphas(image,alphas,min5,max5,min7,max7);
3101 WriteSingleColorFit(image,points,map);
3103 WriteCompressed(image,count,points,map,clusterFit);
3108 static void WriteImageData(Image *image, const size_t pixelFormat,
3109 const size_t compression,const MagickBooleanType clusterFit,
3110 const MagickBooleanType weightByAlpha, ExceptionInfo *exception)
3112 if (pixelFormat == DDPF_FOURCC)
3113 WriteFourCC(image,compression,clusterFit,weightByAlpha,exception);
3115 WriteUncompressed(image,exception);
3118 static inline size_t ClampToLimit(const float value, const size_t limit)
3121 result = (int) (value + 0.5f);
3130 static inline size_t ColorTo565(const DDSVector3 point)
3132 size_t r = ClampToLimit(31.0f*point.x,31);
3133 size_t g = ClampToLimit(63.0f*point.y,63);
3134 size_t b = ClampToLimit(31.0f*point.z,31);
3136 return (r << 11) | (g << 5) | b;
3139 static void WriteIndices(Image *image, const DDSVector3 start,
3140 const DDSVector3 end, unsigned char *indices)
3155 a = ColorTo565(start);
3156 b = ColorTo565(end);
3158 for (i=0; i<16; i++)
3161 remapped[i] = (indices[i] ^ 0x1) & 0x3;
3165 remapped[i] = indices[i];
3171 (void) WriteBlobByte(image,(unsigned char) (a & 0xff));
3172 (void) WriteBlobByte(image,(unsigned char) (a >> 8));
3173 (void) WriteBlobByte(image,(unsigned char) (b & 0xff));
3174 (void) WriteBlobByte(image,(unsigned char) (b >> 8));
3178 ind = remapped + 4*i;
3179 (void) WriteBlobByte(image,ind[0] | (ind[1] << 2) | (ind[2] << 4) |
3184 static MagickBooleanType WriteMipmaps(Image *image,const ImageInfo *image_info,
3185 const size_t pixelFormat,const size_t compression,const size_t mipmaps,
3186 const MagickBooleanType fromlist,const MagickBooleanType clusterFit,
3187 const MagickBooleanType weightByAlpha,ExceptionInfo *exception)
3207 columns=DIV2(image->columns);
3208 rows=DIV2(image->rows);
3210 option=GetImageOption(image_info,"dds:fast-mipmaps");
3211 fast_mipmaps=IsStringTrue(option);
3215 for (i=0; i < (ssize_t) mipmaps; i++)
3217 if (fromlist == MagickFalse)
3219 mipmap_image=ResizeImage(resize_image,columns,rows,TriangleFilter,
3222 if (mipmap_image == (Image *) NULL)
3230 mipmap_image=mipmap_image->next;
3231 if ((mipmap_image->columns != columns) || (mipmap_image->rows != rows))
3232 ThrowBinaryException(CoderError,"ImageColumnOrRowSizeIsNotSupported",
3236 DestroyBlob(mipmap_image);
3237 mipmap_image->blob=ReferenceBlob(image->blob);
3239 WriteImageData(mipmap_image,pixelFormat,compression,weightByAlpha,
3240 clusterFit,exception);
3242 if (fromlist == MagickFalse)
3244 if (fast_mipmaps == MagickFalse)
3245 mipmap_image=DestroyImage(mipmap_image);
3248 if (resize_image != image)
3249 resize_image=DestroyImage(resize_image);
3250 resize_image=mipmap_image;
3254 columns=DIV2(columns);
3258 if (resize_image != image)
3259 resize_image=DestroyImage(resize_image);
3264 static void WriteSingleColorFit(Image *image, const DDSVector4 *points,
3280 color[0] = (unsigned char) ClampToLimit(255.0f*points->x,255);
3281 color[1] = (unsigned char) ClampToLimit(255.0f*points->y,255);
3282 color[2] = (unsigned char) ClampToLimit(255.0f*points->z,255);
3285 ComputeEndPoints(DDS_LOOKUP,color,&start,&end,&index);
3287 for (i=0; i< 16; i++)
3289 RemapIndices(map,indexes,indices);
3290 WriteIndices(image,start,end,indices);
3293 static void WriteUncompressed(Image *image, ExceptionInfo *exception)
3295 register const Quantum
3304 for (y=0; y < (ssize_t) image->rows; y++)
3306 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
3307 if (p == (const Quantum *) NULL)
3310 for (x=0; x < (ssize_t) image->columns; x++)
3312 (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelBlue(image,p)));
3313 (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelGreen(image,p)));
3314 (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelRed(image,p)));
3315 if (image->alpha_trait != UndefinedPixelTrait)
3316 (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelAlpha(image,p)));
3317 p+=GetPixelChannels(image);