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image.c
1
22#include <stdlib.h>
23
24#include <winpr/config.h>
25
26#include <winpr/wtypes.h>
27#include <winpr/crt.h>
28#include <winpr/file.h>
29#include <winpr/cast.h>
30
31#include <winpr/image.h>
32
33#if defined(WINPR_UTILS_IMAGE_PNG)
34#include <png.h>
35#endif
36
37#if defined(WINPR_UTILS_IMAGE_JPEG)
38#define INT32 INT32_WINPR
39#include <jpeglib.h>
40#undef INT32
41#endif
42
43#if defined(WINPR_UTILS_IMAGE_WEBP)
44#include <webp/encode.h>
45#include <webp/decode.h>
46#endif
47
48#if defined(WITH_LODEPNG)
49#include <lodepng.h>
50#endif
51#include <winpr/stream.h>
52
53#include "image.h"
54#include "../log.h"
55#define TAG WINPR_TAG("utils.image")
56
57static SSIZE_T winpr_convert_from_jpeg(const BYTE* comp_data, size_t comp_data_bytes, UINT32* width,
58 UINT32* height, UINT32* bpp, BYTE** ppdecomp_data);
59static SSIZE_T winpr_convert_from_png(const BYTE* comp_data, size_t comp_data_bytes, UINT32* width,
60 UINT32* height, UINT32* bpp, BYTE** ppdecomp_data);
61static SSIZE_T winpr_convert_from_webp(const BYTE* comp_data, size_t comp_data_bytes, UINT32* width,
62 UINT32* height, UINT32* bpp, BYTE** ppdecomp_data);
63
64BOOL writeBitmapFileHeader(wStream* s, const WINPR_BITMAP_FILE_HEADER* bf)
65{
66 if (!Stream_EnsureRemainingCapacity(s, sizeof(WINPR_BITMAP_FILE_HEADER)))
67 return FALSE;
68
69 Stream_Write_UINT8(s, bf->bfType[0]);
70 Stream_Write_UINT8(s, bf->bfType[1]);
71 Stream_Write_UINT32(s, bf->bfSize);
72 Stream_Write_UINT16(s, bf->bfReserved1);
73 Stream_Write_UINT16(s, bf->bfReserved2);
74 Stream_Write_UINT32(s, bf->bfOffBits);
75 return TRUE;
76}
77
78BOOL readBitmapFileHeader(wStream* s, WINPR_BITMAP_FILE_HEADER* bf)
79{
80 static wLog* log = NULL;
81 if (!log)
82 log = WLog_Get(TAG);
83
84 if (!s || !bf ||
85 (!Stream_CheckAndLogRequiredLengthWLog(log, s, sizeof(WINPR_BITMAP_FILE_HEADER))))
86 return FALSE;
87
88 Stream_Read_UINT8(s, bf->bfType[0]);
89 Stream_Read_UINT8(s, bf->bfType[1]);
90 Stream_Read_UINT32(s, bf->bfSize);
91 Stream_Read_UINT16(s, bf->bfReserved1);
92 Stream_Read_UINT16(s, bf->bfReserved2);
93 Stream_Read_UINT32(s, bf->bfOffBits);
94
95 if (bf->bfSize < sizeof(WINPR_BITMAP_FILE_HEADER))
96 {
97 WLog_Print(log, WLOG_ERROR, "Invalid bitmap::bfSize=%" PRIu32 ", require at least %" PRIuz,
98 bf->bfSize, sizeof(WINPR_BITMAP_FILE_HEADER));
99 return FALSE;
100 }
101
102 if ((bf->bfType[0] != 'B') || (bf->bfType[1] != 'M'))
103 {
104 WLog_Print(log, WLOG_ERROR, "Invalid bitmap header [%c%c], expected [BM]", bf->bfType[0],
105 bf->bfType[1]);
106 return FALSE;
107 }
108 return Stream_CheckAndLogRequiredCapacityWLog(log, s,
109 bf->bfSize - sizeof(WINPR_BITMAP_FILE_HEADER));
110}
111
112BOOL writeBitmapInfoHeader(wStream* s, const WINPR_BITMAP_INFO_HEADER* bi)
113{
114 if (!Stream_EnsureRemainingCapacity(s, sizeof(WINPR_BITMAP_INFO_HEADER)))
115 return FALSE;
116
117 Stream_Write_UINT32(s, bi->biSize);
118 Stream_Write_INT32(s, bi->biWidth);
119 Stream_Write_INT32(s, bi->biHeight);
120 Stream_Write_UINT16(s, bi->biPlanes);
121 Stream_Write_UINT16(s, bi->biBitCount);
122 Stream_Write_UINT32(s, bi->biCompression);
123 Stream_Write_UINT32(s, bi->biSizeImage);
124 Stream_Write_INT32(s, bi->biXPelsPerMeter);
125 Stream_Write_INT32(s, bi->biYPelsPerMeter);
126 Stream_Write_UINT32(s, bi->biClrUsed);
127 Stream_Write_UINT32(s, bi->biClrImportant);
128 return TRUE;
129}
130
131BOOL readBitmapInfoHeader(wStream* s, WINPR_BITMAP_INFO_HEADER* bi, size_t* poffset)
132{
133 if (!s || !bi || (!Stream_CheckAndLogRequiredLength(TAG, s, sizeof(WINPR_BITMAP_INFO_HEADER))))
134 return FALSE;
135
136 const size_t start = Stream_GetPosition(s);
137 Stream_Read_UINT32(s, bi->biSize);
138 Stream_Read_INT32(s, bi->biWidth);
139 Stream_Read_INT32(s, bi->biHeight);
140 Stream_Read_UINT16(s, bi->biPlanes);
141 Stream_Read_UINT16(s, bi->biBitCount);
142 Stream_Read_UINT32(s, bi->biCompression);
143 Stream_Read_UINT32(s, bi->biSizeImage);
144 Stream_Read_INT32(s, bi->biXPelsPerMeter);
145 Stream_Read_INT32(s, bi->biYPelsPerMeter);
146 Stream_Read_UINT32(s, bi->biClrUsed);
147 Stream_Read_UINT32(s, bi->biClrImportant);
148
149 if ((bi->biBitCount < 1) || (bi->biBitCount > 32))
150 {
151 WLog_WARN(TAG, "invalid biBitCount=%" PRIu32, bi->biBitCount);
152 return FALSE;
153 }
154
155 /* https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapinfoheader */
156 size_t offset = 0;
157 switch (bi->biCompression)
158 {
159 case BI_RGB:
160 if (bi->biBitCount <= 8)
161 {
162 DWORD used = bi->biClrUsed;
163 if (used == 0)
164 used = (1 << bi->biBitCount) / 8;
165 offset += sizeof(RGBQUAD) * used;
166 }
167 if (bi->biSizeImage == 0)
168 {
169 UINT32 stride = WINPR_ASSERTING_INT_CAST(
170 uint32_t, ((((bi->biWidth * bi->biBitCount) + 31) & ~31) >> 3));
171 bi->biSizeImage = WINPR_ASSERTING_INT_CAST(uint32_t, abs(bi->biHeight)) * stride;
172 }
173 break;
174 case BI_BITFIELDS:
175 offset += sizeof(DWORD) * 3; // 3 DWORD color masks
176 break;
177 default:
178 WLog_ERR(TAG, "unsupported biCompression %" PRIu32, bi->biCompression);
179 return FALSE;
180 }
181
182 if (bi->biSizeImage == 0)
183 {
184 WLog_ERR(TAG, "invalid biSizeImage %" PRIu32, bi->biSizeImage);
185 return FALSE;
186 }
187
188 const size_t pos = Stream_GetPosition(s) - start;
189 if (bi->biSize < pos)
190 {
191 WLog_ERR(TAG, "invalid biSize %" PRIu32 " < (actual) offset %" PRIuz, bi->biSize, pos);
192 return FALSE;
193 }
194
195 *poffset = offset;
196 return Stream_SafeSeek(s, bi->biSize - pos);
197}
198
199BYTE* winpr_bitmap_construct_header(size_t width, size_t height, size_t bpp)
200{
201 BYTE* result = NULL;
202 WINPR_BITMAP_FILE_HEADER bf = { 0 };
203 WINPR_BITMAP_INFO_HEADER bi = { 0 };
204
205 size_t stride = (width * bpp + 7) / 8;
206 if ((stride % 4) != 0)
207 stride += 4 - (stride % 4);
208
209 size_t imgSize = stride * height;
210 if ((width > INT32_MAX) || (height > INT32_MAX) || (bpp > UINT16_MAX) || (imgSize > UINT32_MAX))
211 return NULL;
212
213 wStream* s = Stream_New(NULL, WINPR_IMAGE_BMP_HEADER_LEN);
214 if (!s)
215 return NULL;
216
217 bf.bfType[0] = 'B';
218 bf.bfType[1] = 'M';
219 bf.bfReserved1 = 0;
220 bf.bfReserved2 = 0;
221 bi.biSize = (UINT32)sizeof(WINPR_BITMAP_INFO_HEADER);
222 bf.bfOffBits = (UINT32)sizeof(WINPR_BITMAP_FILE_HEADER) + bi.biSize;
223 bi.biSizeImage = (UINT32)imgSize;
224 bf.bfSize = bf.bfOffBits + bi.biSizeImage;
225 bi.biWidth = (INT32)width;
226 bi.biHeight = -1 * (INT32)height;
227 bi.biPlanes = 1;
228 bi.biBitCount = (UINT16)bpp;
229 bi.biCompression = BI_RGB;
230 bi.biXPelsPerMeter = (INT32)width;
231 bi.biYPelsPerMeter = (INT32)height;
232 bi.biClrUsed = 0;
233 bi.biClrImportant = 0;
234
235 size_t offset = 0;
236 switch (bi.biCompression)
237 {
238 case BI_RGB:
239 if (bi.biBitCount <= 8)
240 {
241 DWORD used = bi.biClrUsed;
242 if (used == 0)
243 used = (1 << bi.biBitCount) / 8;
244 offset += sizeof(RGBQUAD) * used;
245 }
246 break;
247 case BI_BITFIELDS:
248 offset += sizeof(DWORD) * 3; // 3 DWORD color masks
249 break;
250 default:
251 return NULL;
252 }
253
254 if (!writeBitmapFileHeader(s, &bf))
255 goto fail;
256
257 if (!writeBitmapInfoHeader(s, &bi))
258 goto fail;
259
260 if (!Stream_EnsureRemainingCapacity(s, offset))
261 goto fail;
262
263 Stream_Zero(s, offset);
264 result = Stream_Buffer(s);
265fail:
266 Stream_Free(s, result == 0);
267 return result;
268}
269
274WINPR_ATTR_MALLOC(free, 1)
275WINPR_ATTR_NODISCARD
276static void* winpr_bitmap_write_buffer(const BYTE* data, WINPR_ATTR_UNUSED size_t size,
277 UINT32 width, UINT32 height, UINT32 stride, UINT32 bpp,
278 UINT32* pSize)
279{
280 WINPR_ASSERT(data || (size == 0));
281
282 void* result = NULL;
283 size_t bpp_stride = 1ull * width * (bpp / 8);
284 if ((bpp_stride % 4) != 0)
285 bpp_stride += 4 - (bpp_stride % 4);
286
287 if (bpp_stride > UINT32_MAX)
288 return NULL;
289
290 wStream* s = Stream_New(NULL, 1024);
291
292 if (stride == 0)
293 stride = (UINT32)bpp_stride;
294
295 BYTE* bmp_header = winpr_bitmap_construct_header(width, height, bpp);
296 if (!bmp_header)
297 goto fail;
298 if (!Stream_EnsureRemainingCapacity(s, WINPR_IMAGE_BMP_HEADER_LEN))
299 goto fail;
300 Stream_Write(s, bmp_header, WINPR_IMAGE_BMP_HEADER_LEN);
301
302 if (!Stream_EnsureRemainingCapacity(s, 1ULL * bpp_stride * height))
303 goto fail;
304
305 for (size_t y = 0; y < height; y++)
306 {
307 const BYTE* line = &data[stride * y];
308
309 Stream_Write(s, line, stride);
310 Stream_Zero(s, bpp_stride - stride);
311 }
312
313 result = Stream_Buffer(s);
314 {
315 const size_t pos = Stream_GetPosition(s);
316 if (pos > UINT32_MAX)
317 goto fail;
318 *pSize = (UINT32)pos;
319 }
320fail:
321 Stream_Free(s, result == NULL);
322 free(bmp_header);
323 return result;
324}
325
326int winpr_bitmap_write(const char* filename, const BYTE* data, size_t width, size_t height,
327 size_t bpp)
328{
329 return winpr_bitmap_write_ex(filename, data, 0, width, height, bpp);
330}
331
332int winpr_bitmap_write_ex(const char* filename, const BYTE* data, size_t stride, size_t width,
333 size_t height, size_t bpp)
334{
335 FILE* fp = NULL;
336 int ret = -1;
337 void* bmpdata = NULL;
338 const size_t bpp_stride = ((((width * bpp) + 31) & (size_t)~31) >> 3);
339
340 if ((stride > UINT32_MAX) || (width > UINT32_MAX) || (height > UINT32_MAX) ||
341 (bpp > UINT32_MAX))
342 goto fail;
343
344 if (stride == 0)
345 stride = bpp_stride;
346
347 {
348 UINT32 bmpsize = 0;
349 {
350 const size_t size = stride * 1ull * height;
351 bmpdata = winpr_bitmap_write_buffer(data, size, (UINT32)width, (UINT32)height,
352 (UINT32)stride, (UINT32)bpp, &bmpsize);
353 }
354 if (!bmpdata)
355 goto fail;
356
357 fp = winpr_fopen(filename, "w+b");
358 if (!fp)
359 {
360 WLog_ERR(TAG, "failed to open file %s", filename);
361 goto fail;
362 }
363
364 if (fwrite(bmpdata, bmpsize, 1, fp) != 1)
365 goto fail;
366 }
367
368 ret = 0;
369fail:
370 if (fp)
371 (void)fclose(fp);
372 free(bmpdata);
373 return ret;
374}
375
376static int write_and_free(const char* filename, void* data, size_t size)
377{
378 int status = -1;
379 if (!data)
380 goto fail;
381
382 {
383 FILE* fp = winpr_fopen(filename, "w+b");
384 if (!fp)
385 goto fail;
386
387 {
388 const size_t w = fwrite(data, 1, size, fp);
389 (void)fclose(fp);
390 status = (w == size) ? 1 : -1;
391 }
392 }
393fail:
394 free(data);
395 return status;
396}
397
398int winpr_image_write(wImage* image, const char* filename)
399{
400 WINPR_ASSERT(image);
401 return winpr_image_write_ex(image, WINPR_ASSERTING_INT_CAST(uint32_t, image->type), filename);
402}
403
404int winpr_image_write_ex(wImage* image, UINT32 format, const char* filename)
405{
406 WINPR_ASSERT(image);
407
408 size_t size = 0;
409 void* data = winpr_image_write_buffer(image, format, &size);
410 if (!data)
411 return -1;
412 return write_and_free(filename, data, size);
413}
414
415static int winpr_image_bitmap_read_buffer(wImage* image, const BYTE* buffer, size_t size)
416{
417 int rc = -1;
418 BOOL vFlip = 0;
419 WINPR_BITMAP_FILE_HEADER bf = { 0 };
420 WINPR_BITMAP_INFO_HEADER bi = { 0 };
421 wStream sbuffer = { 0 };
422 wStream* s = Stream_StaticConstInit(&sbuffer, buffer, size);
423
424 if (!s)
425 return -1;
426
427 size_t bmpoffset = 0;
428 if (!readBitmapFileHeader(s, &bf) || !readBitmapInfoHeader(s, &bi, &bmpoffset))
429 goto fail;
430
431 if ((bf.bfType[0] != 'B') || (bf.bfType[1] != 'M'))
432 {
433 WLog_WARN(TAG, "Invalid bitmap header %c%c", bf.bfType[0], bf.bfType[1]);
434 goto fail;
435 }
436
437 image->type = WINPR_IMAGE_BITMAP;
438
439 {
440 const size_t pos = Stream_GetPosition(s);
441 const size_t expect = bf.bfOffBits;
442 if (pos != expect)
443 {
444 WLog_WARN(TAG, "pos=%" PRIuz ", expected %" PRIuz ", offset=%" PRIuz, pos, expect,
445 bmpoffset);
446 goto fail;
447 }
448 }
449
450 if (!Stream_CheckAndLogRequiredCapacity(TAG, s, bi.biSizeImage))
451 goto fail;
452
453 if (bi.biWidth <= 0)
454 {
455 WLog_WARN(TAG, "bi.biWidth=%" PRId32, bi.biWidth);
456 goto fail;
457 }
458
459 image->width = (UINT32)bi.biWidth;
460
461 if (bi.biHeight < 0)
462 {
463 vFlip = FALSE;
464 image->height = (UINT32)(-1 * bi.biHeight);
465 }
466 else
467 {
468 vFlip = TRUE;
469 image->height = (UINT32)bi.biHeight;
470 }
471
472 if (image->height <= 0)
473 {
474 WLog_WARN(TAG, "image->height=%" PRIu32, image->height);
475 goto fail;
476 }
477
478 image->bitsPerPixel = bi.biBitCount;
479 {
480 const size_t bpp = (bi.biBitCount + 7UL) / 8UL;
481 image->bytesPerPixel = WINPR_ASSERTING_INT_CAST(uint32_t, bpp);
482
483 image->scanline = WINPR_ASSERTING_INT_CAST(uint32_t, bi.biWidth) * image->bytesPerPixel;
484 if ((image->scanline % 4) != 0)
485 image->scanline += 4 - image->scanline % 4;
486
487 {
488 const size_t bmpsize = 1ULL * image->scanline * image->height;
489 if (bmpsize != bi.biSizeImage)
490 WLog_WARN(TAG, "bmpsize=%" PRIuz " != bi.biSizeImage=%" PRIu32, bmpsize,
491 bi.biSizeImage);
492
493 {
494 size_t scanline = image->scanline;
495 if (bi.biSizeImage < bmpsize)
496 {
497 /* Workaround for unaligned bitmaps */
498 const size_t uscanline = image->width * bpp;
499 const size_t unaligned = image->height * uscanline;
500 if (bi.biSizeImage != unaligned)
501 goto fail;
502 scanline = uscanline;
503 }
504
505 image->data = NULL;
506 {
507 const size_t asize = 1ULL * image->scanline * image->height;
508 if (asize > 0)
509 image->data = (BYTE*)malloc(asize);
510 }
511
512 if (!image->data)
513 goto fail;
514
515 if (!vFlip)
516 {
517 BYTE* pDstData = image->data;
518
519 for (size_t index = 0; index < image->height; index++)
520 {
521 Stream_Read(s, pDstData, scanline);
522 Stream_Seek(s, image->scanline - scanline);
523 pDstData += scanline;
524 }
525 }
526 else
527 {
528 BYTE* pDstData = &(image->data[(image->height - 1ull) * image->scanline]);
529
530 for (size_t index = 0; index < image->height; index++)
531 {
532 Stream_Read(s, pDstData, scanline);
533 Stream_Seek(s, image->scanline - scanline);
534 pDstData -= scanline;
535 }
536 }
537 }
538 }
539 }
540
541 rc = 1;
542fail:
543
544 if (rc < 0)
545 {
546 free(image->data);
547 image->data = NULL;
548 }
549
550 return rc;
551}
552
553int winpr_image_read(wImage* image, const char* filename)
554{
555 int status = -1;
556
557 FILE* fp = winpr_fopen(filename, "rb");
558 if (!fp)
559 {
560 WLog_ERR(TAG, "failed to open file %s", filename);
561 return -1;
562 }
563
564 (void)fseek(fp, 0, SEEK_END);
565 INT64 pos = _ftelli64(fp);
566 (void)fseek(fp, 0, SEEK_SET);
567
568 if (pos > 0)
569 {
570 BYTE* buffer = malloc((size_t)pos);
571 if (buffer)
572 {
573 size_t r = fread(buffer, 1, (size_t)pos, fp);
574 if (r == (size_t)pos)
575 {
576 status = winpr_image_read_buffer(image, buffer, (size_t)pos);
577 }
578 }
579 free(buffer);
580 }
581 (void)fclose(fp);
582 return status;
583}
584
585int winpr_image_read_buffer(wImage* image, const BYTE* buffer, size_t size)
586{
587 BYTE sig[12] = { 0 };
588 int status = -1;
589
590 if (size < sizeof(sig))
591 return -1;
592
593 CopyMemory(sig, buffer, sizeof(sig));
594
595 if ((sig[0] == 'B') && (sig[1] == 'M'))
596 {
597 image->type = WINPR_IMAGE_BITMAP;
598 status = winpr_image_bitmap_read_buffer(image, buffer, size);
599 }
600 else if ((sig[0] == 'R') && (sig[1] == 'I') && (sig[2] == 'F') && (sig[3] == 'F') &&
601 (sig[8] == 'W') && (sig[9] == 'E') && (sig[10] == 'B') && (sig[11] == 'P'))
602 {
603 image->type = WINPR_IMAGE_WEBP;
604 const SSIZE_T rc = winpr_convert_from_webp(buffer, size, &image->width, &image->height,
605 &image->bitsPerPixel, &image->data);
606 if (rc >= 0)
607 {
608 image->bytesPerPixel = (image->bitsPerPixel + 7) / 8;
609 image->scanline = image->width * image->bytesPerPixel;
610 status = 1;
611 }
612 }
613 else if ((sig[0] == 0xFF) && (sig[1] == 0xD8) && (sig[2] == 0xFF) && (sig[3] == 0xE0) &&
614 (sig[6] == 0x4A) && (sig[7] == 0x46) && (sig[8] == 0x49) && (sig[9] == 0x46) &&
615 (sig[10] == 0x00))
616 {
617 image->type = WINPR_IMAGE_JPEG;
618 const SSIZE_T rc = winpr_convert_from_jpeg(buffer, size, &image->width, &image->height,
619 &image->bitsPerPixel, &image->data);
620 if (rc >= 0)
621 {
622 image->bytesPerPixel = (image->bitsPerPixel + 7) / 8;
623 image->scanline = image->width * image->bytesPerPixel;
624 status = 1;
625 }
626 }
627 else if ((sig[0] == 0x89) && (sig[1] == 'P') && (sig[2] == 'N') && (sig[3] == 'G') &&
628 (sig[4] == '\r') && (sig[5] == '\n') && (sig[6] == 0x1A) && (sig[7] == '\n'))
629 {
630 image->type = WINPR_IMAGE_PNG;
631 const SSIZE_T rc = winpr_convert_from_png(buffer, size, &image->width, &image->height,
632 &image->bitsPerPixel, &image->data);
633 if (rc >= 0)
634 {
635 image->bytesPerPixel = (image->bitsPerPixel + 7) / 8;
636 image->scanline = image->width * image->bytesPerPixel;
637 status = 1;
638 }
639 }
640
641 return status;
642}
643
644wImage* winpr_image_new(void)
645{
646 wImage* image = (wImage*)calloc(1, sizeof(wImage));
647
648 if (!image)
649 return NULL;
650
651 return image;
652}
653
654void winpr_image_free(wImage* image, BOOL bFreeBuffer)
655{
656 if (!image)
657 return;
658
659 if (bFreeBuffer)
660 free(image->data);
661
662 free(image);
663}
664
665static void* winpr_convert_to_jpeg(WINPR_ATTR_UNUSED const void* data,
666 WINPR_ATTR_UNUSED size_t size, WINPR_ATTR_UNUSED UINT32 width,
667 WINPR_ATTR_UNUSED UINT32 height, WINPR_ATTR_UNUSED UINT32 stride,
668 WINPR_ATTR_UNUSED UINT32 bpp, WINPR_ATTR_UNUSED UINT32* pSize)
669{
670 WINPR_ASSERT(data || (size == 0));
671 WINPR_ASSERT(pSize);
672
673 *pSize = 0;
674
675#if !defined(WINPR_UTILS_IMAGE_JPEG)
676 WLog_WARN(TAG, "JPEG not supported in this build");
677 return NULL;
678#else
679 BYTE* outbuffer = NULL;
680 unsigned long outsize = 0;
681 struct jpeg_compress_struct cinfo = { 0 };
682
683 const size_t expect1 = 1ull * stride * height;
684 const size_t bytes = (bpp + 7) / 8;
685 const size_t expect2 = 1ull * width * height * bytes;
686 if (expect1 < expect2)
687 return NULL;
688 if (expect1 > size)
689 return NULL;
690
691 /* Set up the error handler. */
692 struct jpeg_error_mgr jerr = { 0 };
693 cinfo.err = jpeg_std_error(&jerr);
694
695 jpeg_create_compress(&cinfo);
696 jpeg_mem_dest(&cinfo, &outbuffer, &outsize);
697
698 cinfo.image_width = width;
699 cinfo.image_height = height;
700 WINPR_ASSERT(bpp <= INT32_MAX / 8);
701 cinfo.input_components = (int)(bpp + 7) / 8;
702 cinfo.in_color_space = (bpp > 24) ? JCS_EXT_BGRA : JCS_EXT_BGR;
703 cinfo.data_precision = 8;
704
705 jpeg_set_defaults(&cinfo);
706 jpeg_set_quality(&cinfo, 100, TRUE);
707 /* Use 4:4:4 subsampling (default is 4:2:0) */
708 cinfo.comp_info[0].h_samp_factor = cinfo.comp_info[0].v_samp_factor = 1;
709
710 jpeg_start_compress(&cinfo, TRUE);
711
712 const JSAMPLE* cdata = data;
713 for (size_t x = 0; x < height; x++)
714 {
715 WINPR_ASSERT(x * stride <= UINT32_MAX);
716 const JDIMENSION offset = (JDIMENSION)x * stride;
717
718 /* libjpeg is not const correct, we must cast here to avoid issues
719 * with newer C compilers type check errors */
720 JSAMPLE* coffset = WINPR_CAST_CONST_PTR_AWAY(&cdata[offset], JSAMPLE*);
721 if (jpeg_write_scanlines(&cinfo, &coffset, 1) != 1)
722 goto fail;
723 }
724
725fail:
726 jpeg_finish_compress(&cinfo);
727 jpeg_destroy_compress(&cinfo);
728
729 WINPR_ASSERT(outsize <= UINT32_MAX);
730 *pSize = (UINT32)outsize;
731 return outbuffer;
732#endif
733}
734
735// NOLINTBEGIN(readability-non-const-parameter)
736SSIZE_T winpr_convert_from_jpeg(WINPR_ATTR_UNUSED const BYTE* comp_data,
737 WINPR_ATTR_UNUSED size_t comp_data_bytes,
738 WINPR_ATTR_UNUSED UINT32* width, WINPR_ATTR_UNUSED UINT32* height,
739 WINPR_ATTR_UNUSED UINT32* bpp,
740 WINPR_ATTR_UNUSED BYTE** ppdecomp_data)
741// NOLINTEND(readability-non-const-parameter)
742{
743 WINPR_ASSERT(comp_data || (comp_data_bytes == 0));
744 WINPR_ASSERT(width);
745 WINPR_ASSERT(height);
746 WINPR_ASSERT(bpp);
747 WINPR_ASSERT(ppdecomp_data);
748
749#if !defined(WINPR_UTILS_IMAGE_JPEG)
750 WLog_WARN(TAG, "JPEG not supported in this build");
751 return -1;
752#else
753 struct jpeg_decompress_struct cinfo = { 0 };
754 struct jpeg_error_mgr jerr;
755 SSIZE_T size = -1;
756 BYTE* decomp_data = NULL;
757
758 cinfo.err = jpeg_std_error(&jerr);
759 jpeg_create_decompress(&cinfo);
760 jpeg_mem_src(&cinfo, comp_data, comp_data_bytes);
761
762 if (jpeg_read_header(&cinfo, 1) != JPEG_HEADER_OK)
763 goto fail;
764
765 cinfo.out_color_space = cinfo.num_components > 3 ? JCS_EXT_RGBA : JCS_EXT_BGR;
766
767 *width = WINPR_ASSERTING_INT_CAST(uint32_t, cinfo.image_width);
768 *height = WINPR_ASSERTING_INT_CAST(uint32_t, cinfo.image_height);
769 *bpp = WINPR_ASSERTING_INT_CAST(uint32_t, cinfo.num_components * 8);
770
771 if (!jpeg_start_decompress(&cinfo))
772 goto fail;
773
774 size_t stride =
775 1ULL * cinfo.image_width * WINPR_ASSERTING_INT_CAST(uint32_t, cinfo.num_components);
776
777 if ((stride == 0) || (cinfo.image_height == 0))
778 goto fail;
779
780 decomp_data = calloc(stride, cinfo.image_height);
781 if (decomp_data)
782 {
783 while (cinfo.output_scanline < cinfo.image_height)
784 {
785 JSAMPROW row = &decomp_data[cinfo.output_scanline * stride];
786 if (jpeg_read_scanlines(&cinfo, &row, 1) != 1)
787 goto fail;
788 }
789 const size_t ssize = stride * cinfo.image_height;
790 WINPR_ASSERT(ssize < SSIZE_MAX);
791 size = (SSIZE_T)ssize;
792 }
793 jpeg_finish_decompress(&cinfo);
794
795fail:
796 jpeg_destroy_decompress(&cinfo);
797 *ppdecomp_data = decomp_data;
798 return size;
799#endif
800}
801
802static void* winpr_convert_to_webp(WINPR_ATTR_UNUSED const void* data,
803 WINPR_ATTR_UNUSED size_t size, WINPR_ATTR_UNUSED UINT32 width,
804 WINPR_ATTR_UNUSED UINT32 height, WINPR_ATTR_UNUSED UINT32 stride,
805 WINPR_ATTR_UNUSED UINT32 bpp, UINT32* pSize)
806{
807 WINPR_ASSERT(data || (size == 0));
808 WINPR_ASSERT(pSize);
809
810 *pSize = 0;
811
812#if !defined(WINPR_UTILS_IMAGE_WEBP)
813 WLog_WARN(TAG, "WEBP not supported in this build");
814 return NULL;
815#else
816 size_t dstSize = 0;
817 uint8_t* pDstData = NULL;
818 WINPR_ASSERT(width <= INT32_MAX);
819 WINPR_ASSERT(height <= INT32_MAX);
820 WINPR_ASSERT(stride <= INT32_MAX);
821 switch (bpp)
822 {
823 case 32:
824 dstSize = WebPEncodeLosslessBGRA(data, (int)width, (int)height, (int)stride, &pDstData);
825 break;
826 case 24:
827 dstSize = WebPEncodeLosslessBGR(data, (int)width, (int)height, (int)stride, &pDstData);
828 break;
829 default:
830 return NULL;
831 }
832
833 void* rc = malloc(dstSize);
834 if (rc)
835 {
836 memcpy(rc, pDstData, dstSize);
837
838 WINPR_ASSERT(dstSize <= UINT32_MAX);
839 *pSize = (UINT32)dstSize;
840 }
841 WebPFree(pDstData);
842 return rc;
843#endif
844}
845
846SSIZE_T winpr_convert_from_webp(WINPR_ATTR_UNUSED const BYTE* comp_data,
847 WINPR_ATTR_UNUSED size_t comp_data_bytes, UINT32* width,
848 UINT32* height, UINT32* bpp, BYTE** ppdecomp_data)
849{
850 WINPR_ASSERT(comp_data || (comp_data_bytes == 0));
851 WINPR_ASSERT(width);
852 WINPR_ASSERT(height);
853 WINPR_ASSERT(bpp);
854 WINPR_ASSERT(ppdecomp_data);
855
856 *width = 0;
857 *height = 0;
858 *bpp = 0;
859 *ppdecomp_data = NULL;
860#if !defined(WINPR_UTILS_IMAGE_WEBP)
861 WLog_WARN(TAG, "WEBP not supported in this build");
862 return -1;
863#else
864
865 int w = 0;
866 int h = 0;
867 uint8_t* dst = WebPDecodeBGRA(comp_data, comp_data_bytes, &w, &h);
868 if (!dst || (w < 0) || (h < 0))
869 {
870 free(dst);
871 return -1;
872 }
873
874 *width = WINPR_ASSERTING_INT_CAST(uint32_t, w);
875 *height = WINPR_ASSERTING_INT_CAST(uint32_t, h);
876 *bpp = 32;
877 *ppdecomp_data = dst;
878 return 4ll * w * h;
879#endif
880}
881
882#if defined(WINPR_UTILS_IMAGE_PNG)
883struct png_mem_encode
884{
885 char* buffer;
886 size_t size;
887};
888
889static void png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
890{
891 /* with libpng15 next line causes pointer deference error; use libpng12 */
892 struct png_mem_encode* p =
893 (struct png_mem_encode*)png_get_io_ptr(png_ptr); /* was png_ptr->io_ptr */
894 size_t nsize = p->size + length;
895
896 /* allocate or grow buffer */
897 if (p->buffer)
898 {
899 char* tmp = realloc(p->buffer, nsize);
900 if (tmp)
901 p->buffer = tmp;
902 }
903 else
904 p->buffer = malloc(nsize);
905
906 if (!p->buffer)
907 png_error(png_ptr, "Write Error");
908
909 /* copy new bytes to end of buffer */
910 memcpy(p->buffer + p->size, data, length);
911 p->size += length;
912}
913
914/* This is optional but included to show how png_set_write_fn() is called */
915static void png_flush(WINPR_ATTR_UNUSED png_structp png_ptr)
916{
917}
918
919static SSIZE_T save_png_to_buffer(UINT32 bpp, UINT32 width, uint32_t stride, UINT32 height,
920 const uint8_t* data, size_t size, void** pDstData)
921{
922 SSIZE_T rc = -1;
923 png_structp png_ptr = NULL;
924 png_infop info_ptr = NULL;
925 png_byte** row_pointers = NULL;
926 struct png_mem_encode state = { 0 };
927
928 *pDstData = NULL;
929
930 if (!data || (size == 0))
931 return 0;
932
933 WINPR_ASSERT(pDstData);
934
935 if (size < (1ULL * stride * height))
936 goto fail;
937
938 /* Initialize the write struct. */
939 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
940 if (png_ptr == NULL)
941 goto fail;
942
943 /* Initialize the info struct. */
944 info_ptr = png_create_info_struct(png_ptr);
945 if (info_ptr == NULL)
946 goto fail;
947
948 /* Set up error handling. */
949 if (setjmp(png_jmpbuf(png_ptr)))
950 goto fail;
951
952 /* Set image attributes. */
953 int colorType = PNG_COLOR_TYPE_PALETTE;
954 if (bpp > 8)
955 colorType = PNG_COLOR_TYPE_RGB;
956 if (bpp > 16)
957 colorType = PNG_COLOR_TYPE_RGB;
958 if (bpp > 24)
959 colorType = PNG_COLOR_TYPE_RGBA;
960
961 png_set_IHDR(png_ptr, info_ptr, width, height, 8, colorType, PNG_INTERLACE_NONE,
962 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
963
964 /* Initialize rows of PNG. */
965 row_pointers = (png_byte**)png_malloc(png_ptr, height * sizeof(png_byte*));
966 for (size_t y = 0; y < height; ++y)
967 {
968 const uint8_t* line = &data[y * stride];
969 uint8_t* row = png_malloc(png_ptr, sizeof(uint8_t) * stride);
970 row_pointers[y] = (png_byte*)row;
971 for (size_t x = 0; x < width; ++x)
972 {
973
974 *row++ = *line++;
975 if (bpp > 8)
976 *row++ = *line++;
977 if (bpp > 16)
978 *row++ = *line++;
979 if (bpp > 24)
980 *row++ = *line++;
981 }
982 }
983
984 /* Actually write the image data. */
985 png_set_write_fn(png_ptr, &state, png_write_data, png_flush);
986 png_set_rows(png_ptr, info_ptr, row_pointers);
987 png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
988
989 /* Cleanup. */
990 for (size_t y = 0; y < height; y++)
991 png_free(png_ptr, row_pointers[y]);
992 png_free(png_ptr, (void*)row_pointers);
993
994 /* Finish writing. */
995 if (state.size > SSIZE_MAX)
996 goto fail;
997 rc = (SSIZE_T)state.size;
998 *pDstData = state.buffer;
999fail:
1000 png_destroy_write_struct(&png_ptr, &info_ptr);
1001 if (rc < 0)
1002 free(state.buffer);
1003 return rc;
1004}
1005
1006typedef struct
1007{
1008 png_bytep buffer;
1009 png_uint_32 bufsize;
1010 png_uint_32 current_pos;
1011} MEMORY_READER_STATE;
1012
1013static void read_data_memory(png_structp png_ptr, png_bytep data, size_t length)
1014{
1015 MEMORY_READER_STATE* f = png_get_io_ptr(png_ptr);
1016 if (length > (f->bufsize - f->current_pos))
1017 png_error(png_ptr, "read error in read_data_memory (loadpng)");
1018 else
1019 {
1020 memcpy(data, f->buffer + f->current_pos, length);
1021 f->current_pos += length;
1022 }
1023}
1024
1025static void* winpr_read_png_from_buffer(const void* data, size_t SrcSize, size_t* pSize,
1026 UINT32* pWidth, UINT32* pHeight, UINT32* pBpp)
1027{
1028 void* rc = NULL;
1029 png_uint_32 width = 0;
1030 png_uint_32 height = 0;
1031 int bit_depth = 0;
1032 int color_type = 0;
1033 int interlace_type = 0;
1034 int transforms = PNG_TRANSFORM_IDENTITY;
1035 MEMORY_READER_STATE memory_reader_state = { 0 };
1036 png_bytepp row_pointers = NULL;
1037 png_infop info_ptr = NULL;
1038 if (SrcSize > UINT32_MAX)
1039 return NULL;
1040
1041 png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1042 if (!png_ptr)
1043 goto fail;
1044 info_ptr = png_create_info_struct(png_ptr);
1045 if (!info_ptr)
1046 goto fail;
1047
1048 memory_reader_state.buffer = WINPR_CAST_CONST_PTR_AWAY(data, png_bytep);
1049 memory_reader_state.bufsize = (UINT32)SrcSize;
1050 memory_reader_state.current_pos = 0;
1051
1052 png_set_read_fn(png_ptr, &memory_reader_state, read_data_memory);
1053
1054 transforms |= PNG_TRANSFORM_BGR;
1055 png_read_png(png_ptr, info_ptr, transforms, NULL);
1056
1057 if (png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type,
1058 NULL, NULL) != 1)
1059 goto fail;
1060
1061 WINPR_ASSERT(bit_depth >= 0);
1062 const png_byte channelcount = png_get_channels(png_ptr, info_ptr);
1063 const size_t bpp = channelcount * (size_t)bit_depth;
1064
1065 row_pointers = png_get_rows(png_ptr, info_ptr);
1066 if (row_pointers)
1067 {
1068 const size_t stride = 1ULL * width * bpp / 8ull;
1069 const size_t png_stride = png_get_rowbytes(png_ptr, info_ptr);
1070 const size_t size = 1ULL * width * height * bpp / 8ull;
1071 const size_t copybytes = stride > png_stride ? png_stride : stride;
1072
1073 rc = malloc(size);
1074 if (rc)
1075 {
1076 char* cur = rc;
1077 for (png_uint_32 i = 0; i < height; i++)
1078 {
1079 memcpy(cur, row_pointers[i], copybytes);
1080 cur += stride;
1081 }
1082 *pSize = size;
1083 *pWidth = width;
1084 *pHeight = height;
1085 WINPR_ASSERT(bpp <= UINT32_MAX);
1086 *pBpp = (UINT32)bpp;
1087 }
1088 }
1089fail:
1090
1091 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
1092 return rc;
1093}
1094#endif
1095
1096static void* winpr_convert_to_png(WINPR_ATTR_UNUSED const void* data, WINPR_ATTR_UNUSED size_t size,
1097 WINPR_ATTR_UNUSED UINT32 width, WINPR_ATTR_UNUSED UINT32 height,
1098 WINPR_ATTR_UNUSED UINT32 stride, WINPR_ATTR_UNUSED UINT32 bpp,
1099 UINT32* pSize)
1100{
1101 WINPR_ASSERT(data || (size == 0));
1102 WINPR_ASSERT(pSize);
1103
1104 *pSize = 0;
1105
1106#if defined(WINPR_UTILS_IMAGE_PNG)
1107 void* dst = NULL;
1108 SSIZE_T rc = save_png_to_buffer(bpp, width, stride, height, data, size, &dst);
1109 if (rc <= 0)
1110 return NULL;
1111 *pSize = (UINT32)rc;
1112 return dst;
1113#elif defined(WITH_LODEPNG)
1114 {
1115 BYTE* dst = NULL;
1116 size_t dstsize = 0;
1117 unsigned rc = 1;
1118
1119 switch (bpp)
1120 {
1121 case 32:
1122 rc = lodepng_encode32(&dst, &dstsize, data, width, height);
1123 break;
1124 case 24:
1125 rc = lodepng_encode24(&dst, &dstsize, data, width, height);
1126 break;
1127 default:
1128 break;
1129 }
1130 if (rc)
1131 return NULL;
1132 *pSize = (UINT32)dstsize;
1133 return dst;
1134 }
1135#else
1136 WLog_WARN(TAG, "PNG not supported in this build");
1137 return NULL;
1138#endif
1139}
1140
1141SSIZE_T winpr_convert_from_png(WINPR_ATTR_UNUSED const BYTE* comp_data,
1142 WINPR_ATTR_UNUSED size_t comp_data_bytes,
1143 WINPR_ATTR_UNUSED UINT32* width, WINPR_ATTR_UNUSED UINT32* height,
1144 WINPR_ATTR_UNUSED UINT32* bpp,
1145 WINPR_ATTR_UNUSED BYTE** ppdecomp_data)
1146{
1147#if defined(WINPR_UTILS_IMAGE_PNG)
1148 size_t len = 0;
1149 *ppdecomp_data =
1150 winpr_read_png_from_buffer(comp_data, comp_data_bytes, &len, width, height, bpp);
1151 if (!*ppdecomp_data)
1152 return -1;
1153 return (SSIZE_T)len;
1154#elif defined(WITH_LODEPNG)
1155 *bpp = 32;
1156 return lodepng_decode32((unsigned char**)ppdecomp_data, width, height, comp_data,
1157 comp_data_bytes);
1158#else
1159 WLog_WARN(TAG, "PNG not supported in this build");
1160 return -1;
1161#endif
1162}
1163
1164BOOL winpr_image_format_is_supported(UINT32 format)
1165{
1166 switch (format)
1167 {
1168 case WINPR_IMAGE_BITMAP:
1169#if defined(WINPR_UTILS_IMAGE_PNG) || defined(WITH_LODEPNG)
1170 case WINPR_IMAGE_PNG:
1171#endif
1172#if defined(WINPR_UTILS_IMAGE_JPEG)
1173 case WINPR_IMAGE_JPEG:
1174#endif
1175#if defined(WINPR_UTILS_IMAGE_WEBP)
1176 case WINPR_IMAGE_WEBP:
1177#endif
1178 return TRUE;
1179 default:
1180 return FALSE;
1181 }
1182}
1183
1184static BYTE* convert(const wImage* image, size_t* pstride, WINPR_ATTR_UNUSED UINT32 flags)
1185{
1186 WINPR_ASSERT(image);
1187 WINPR_ASSERT(pstride);
1188
1189 *pstride = 0;
1190 if (image->bitsPerPixel < 24)
1191 return NULL;
1192
1193 const size_t stride = image->width * 4ull;
1194 BYTE* data = calloc(stride, image->height);
1195 if (data)
1196 {
1197 for (size_t y = 0; y < image->height; y++)
1198 {
1199 const BYTE* srcLine = &image->data[image->scanline * y];
1200 BYTE* dstLine = &data[stride * y];
1201 if (image->bitsPerPixel == 32)
1202 memcpy(dstLine, srcLine, stride);
1203 else
1204 {
1205 for (size_t x = 0; x < image->width; x++)
1206 {
1207 const BYTE* src = &srcLine[image->bytesPerPixel * x];
1208 BYTE* dst = &dstLine[4ull * x];
1209 BYTE b = *src++;
1210 BYTE g = *src++;
1211 BYTE r = *src++;
1212
1213 *dst++ = b;
1214 *dst++ = g;
1215 *dst++ = r;
1216 *dst++ = 0xff;
1217 }
1218 }
1219 }
1220 *pstride = stride;
1221 }
1222 return data;
1223}
1224
1225static BOOL compare_byte_relaxed(BYTE a, BYTE b, UINT32 flags)
1226{
1227 if (a != b)
1228 {
1229 if ((flags & WINPR_IMAGE_CMP_FUZZY) != 0)
1230 {
1231 const int diff = abs((int)a) - abs((int)b);
1232 /* filter out quantization errors */
1233 if (diff > 6)
1234 return FALSE;
1235 }
1236 else
1237 {
1238 return FALSE;
1239 }
1240 }
1241 return TRUE;
1242}
1243
1244static BOOL compare_pixel(const BYTE* pa, const BYTE* pb, UINT32 flags)
1245{
1246 WINPR_ASSERT(pa);
1247 WINPR_ASSERT(pb);
1248
1249 if (!compare_byte_relaxed(*pa++, *pb++, flags))
1250 return FALSE;
1251 if (!compare_byte_relaxed(*pa++, *pb++, flags))
1252 return FALSE;
1253 if (!compare_byte_relaxed(*pa++, *pb++, flags))
1254 return FALSE;
1255 if ((flags & WINPR_IMAGE_CMP_IGNORE_ALPHA) == 0)
1256 {
1257 if (!compare_byte_relaxed(*pa++, *pb++, flags))
1258 return FALSE;
1259 }
1260 return TRUE;
1261}
1262
1263BOOL winpr_image_equal(const wImage* imageA, const wImage* imageB, UINT32 flags)
1264{
1265 if (imageA == imageB)
1266 return TRUE;
1267 if (!imageA || !imageB)
1268 return FALSE;
1269
1270 if (imageA->height != imageB->height)
1271 return FALSE;
1272 if (imageA->width != imageB->width)
1273 return FALSE;
1274
1275 if ((flags & WINPR_IMAGE_CMP_IGNORE_DEPTH) == 0)
1276 {
1277 if (imageA->bitsPerPixel != imageB->bitsPerPixel)
1278 return FALSE;
1279 if (imageA->bytesPerPixel != imageB->bytesPerPixel)
1280 return FALSE;
1281 }
1282
1283 BOOL rc = FALSE;
1284 size_t astride = 0;
1285 size_t bstride = 0;
1286 BYTE* dataA = convert(imageA, &astride, flags);
1287 BYTE* dataB = convert(imageA, &bstride, flags);
1288 if (dataA && dataB && (astride == bstride))
1289 {
1290 rc = TRUE;
1291 for (size_t y = 0; y < imageA->height; y++)
1292 {
1293 const BYTE* lineA = &dataA[astride * y];
1294 const BYTE* lineB = &dataB[bstride * y];
1295
1296 for (size_t x = 0; x < imageA->width; x++)
1297 {
1298 const BYTE* pa = &lineA[x * 4ull];
1299 const BYTE* pb = &lineB[x * 4ull];
1300
1301 if (!compare_pixel(pa, pb, flags))
1302 rc = FALSE;
1303 }
1304 }
1305 }
1306 free(dataA);
1307 free(dataB);
1308 return rc;
1309}
1310
1311const char* winpr_image_format_mime(UINT32 format)
1312{
1313 switch (format)
1314 {
1315 case WINPR_IMAGE_BITMAP:
1316 return "image/bmp";
1317 case WINPR_IMAGE_PNG:
1318 return "image/png";
1319 case WINPR_IMAGE_WEBP:
1320 return "image/webp";
1321 case WINPR_IMAGE_JPEG:
1322 return "image/jpeg";
1323 default:
1324 return NULL;
1325 }
1326}
1327
1328const char* winpr_image_format_extension(UINT32 format)
1329{
1330 switch (format)
1331 {
1332 case WINPR_IMAGE_BITMAP:
1333 return "bmp";
1334 case WINPR_IMAGE_PNG:
1335 return "png";
1336 case WINPR_IMAGE_WEBP:
1337 return "webp";
1338 case WINPR_IMAGE_JPEG:
1339 return "jpg";
1340 default:
1341 return NULL;
1342 }
1343}
1344
1345void* winpr_image_write_buffer(wImage* image, UINT32 format, size_t* psize)
1346{
1347 WINPR_ASSERT(image);
1348 switch (format)
1349 {
1350 case WINPR_IMAGE_BITMAP:
1351 {
1352 UINT32 outsize = 0;
1353 size_t size = 1ull * image->height * image->scanline;
1354 void* data = winpr_bitmap_write_buffer(image->data, size, image->width, image->height,
1355 image->scanline, image->bitsPerPixel, &outsize);
1356 *psize = outsize;
1357 return data;
1358 }
1359 case WINPR_IMAGE_WEBP:
1360 {
1361 UINT32 outsize = 0;
1362 size_t size = 1ull * image->height * image->scanline;
1363 void* data = winpr_convert_to_webp(image->data, size, image->width, image->height,
1364 image->scanline, image->bitsPerPixel, &outsize);
1365 *psize = outsize;
1366 return data;
1367 }
1368 case WINPR_IMAGE_JPEG:
1369 {
1370 UINT32 outsize = 0;
1371 size_t size = 1ull * image->height * image->scanline;
1372 void* data = winpr_convert_to_jpeg(image->data, size, image->width, image->height,
1373 image->scanline, image->bitsPerPixel, &outsize);
1374 *psize = outsize;
1375 return data;
1376 }
1377 case WINPR_IMAGE_PNG:
1378 {
1379 UINT32 outsize = 0;
1380 size_t size = 1ull * image->height * image->scanline;
1381 void* data = winpr_convert_to_png(image->data, size, image->width, image->height,
1382 image->scanline, image->bitsPerPixel, &outsize);
1383 *psize = outsize;
1384 return data;
1385 }
1386 default:
1387 *psize = 0;
1388 return NULL;
1389 }
1390}
WINPR_BITMAP_FILE_HEADER
Definition include/winpr/image.h:29
WINPR_BITMAP_INFO_HEADER
Definition include/winpr/image.h:38