summaryrefslogtreecommitdiff
path: root/core/fxcodec/codec/fx_codec_tiff.cpp
blob: 96249f9d1477b8e5bcc74760cb88a696850f6612 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "core/fxcodec/codec/codec_int.h"
#include "core/include/fxcodec/fx_codec.h"
#include "core/include/fxge/fx_dib.h"

extern "C" {
#include "third_party/libtiff/tiffiop.h"
}

void* IccLib_CreateTransform_sRGB(const unsigned char* pProfileData,
                                  unsigned int dwProfileSize,
                                  int nComponents,
                                  int intent,
                                  uint32_t dwSrcFormat = Icc_FORMAT_DEFAULT);
void IccLib_TranslateImage(void* pTransform,
                           unsigned char* pDest,
                           const unsigned char* pSrc,
                           int pixels);
void IccLib_DestroyTransform(void* pTransform);
class CCodec_TiffContext {
 public:
  CCodec_TiffContext();
  ~CCodec_TiffContext();

  FX_BOOL InitDecoder(IFX_FileRead* file_ptr);
  void GetFrames(int32_t& frames);
  FX_BOOL LoadFrameInfo(int32_t frame,
                        uint32_t& width,
                        uint32_t& height,
                        uint32_t& comps,
                        uint32_t& bpc,
                        CFX_DIBAttribute* pAttribute);
  FX_BOOL Decode(CFX_DIBitmap* pDIBitmap);

  union {
    IFX_FileRead* in;
    IFX_FileStream* out;
  } io;

  uint32_t offset;

  TIFF* tif_ctx;
  void* icc_ctx;
  int32_t frame_num;
  int32_t frame_cur;
  FX_BOOL isDecoder;

 private:
  FX_BOOL isSupport(CFX_DIBitmap* pDIBitmap);
  void SetPalette(CFX_DIBitmap* pDIBitmap, uint16_t bps);
  FX_BOOL Decode1bppRGB(CFX_DIBitmap* pDIBitmap,
                        int32_t height,
                        int32_t width,
                        uint16_t bps,
                        uint16_t spp);
  FX_BOOL Decode8bppRGB(CFX_DIBitmap* pDIBitmap,
                        int32_t height,
                        int32_t width,
                        uint16_t bps,
                        uint16_t spp);
  FX_BOOL Decode24bppRGB(CFX_DIBitmap* pDIBitmap,
                         int32_t height,
                         int32_t width,
                         uint16_t bps,
                         uint16_t spp);
};
CCodec_TiffContext::CCodec_TiffContext() {
  offset = 0;
  frame_num = 0;
  frame_cur = 0;
  io.in = NULL;
  tif_ctx = NULL;
  icc_ctx = NULL;
  isDecoder = TRUE;
}
CCodec_TiffContext::~CCodec_TiffContext() {
  if (icc_ctx) {
    IccLib_DestroyTransform(icc_ctx);
    icc_ctx = NULL;
  }
  if (tif_ctx) {
    TIFFClose(tif_ctx);
  }
}
static tsize_t _tiff_read(thandle_t context, tdata_t buf, tsize_t length) {
  CCodec_TiffContext* pTiffContext = (CCodec_TiffContext*)context;
  FX_BOOL ret = FALSE;
  if (pTiffContext->isDecoder) {
    ret = pTiffContext->io.in->ReadBlock(buf, pTiffContext->offset, length);
  } else {
    ret = pTiffContext->io.out->ReadBlock(buf, pTiffContext->offset, length);
  }
  if (!ret) {
    return 0;
  }
  pTiffContext->offset += (uint32_t)length;
  return length;
}
static tsize_t _tiff_write(thandle_t context, tdata_t buf, tsize_t length) {
  CCodec_TiffContext* pTiffContext = (CCodec_TiffContext*)context;
  ASSERT(!pTiffContext->isDecoder);
  if (!pTiffContext->io.out->WriteBlock(buf, pTiffContext->offset, length)) {
    return 0;
  }
  pTiffContext->offset += (uint32_t)length;
  return length;
}
static toff_t _tiff_seek(thandle_t context, toff_t offset, int whence) {
  CCodec_TiffContext* pTiffContext = (CCodec_TiffContext*)context;
  switch (whence) {
    case 0:
      pTiffContext->offset = (uint32_t)offset;
      break;
    case 1:
      pTiffContext->offset += (uint32_t)offset;
      break;
    case 2:
      if (pTiffContext->isDecoder) {
        if (pTiffContext->io.in->GetSize() < (FX_FILESIZE)offset) {
          return static_cast<toff_t>(-1);
        }
        pTiffContext->offset =
            (uint32_t)(pTiffContext->io.in->GetSize() - offset);
      } else {
        if (pTiffContext->io.out->GetSize() < (FX_FILESIZE)offset) {
          return static_cast<toff_t>(-1);
        }
        pTiffContext->offset =
            (uint32_t)(pTiffContext->io.out->GetSize() - offset);
      }
      break;
    default:
      return static_cast<toff_t>(-1);
  }
  ASSERT(pTiffContext->isDecoder ? (pTiffContext->offset <=
                                    (uint32_t)pTiffContext->io.in->GetSize())
                                 : TRUE);
  return pTiffContext->offset;
}
static int _tiff_close(thandle_t context) {
  return 0;
}
static toff_t _tiff_get_size(thandle_t context) {
  CCodec_TiffContext* pTiffContext = (CCodec_TiffContext*)context;
  return pTiffContext->isDecoder ? (toff_t)pTiffContext->io.in->GetSize()
                                 : (toff_t)pTiffContext->io.out->GetSize();
}
static int _tiff_map(thandle_t context, tdata_t*, toff_t*) {
  return 0;
}
static void _tiff_unmap(thandle_t context, tdata_t, toff_t) {}
TIFF* _tiff_open(void* context, const char* mode) {
  TIFF* tif = TIFFClientOpen("Tiff Image", mode, (thandle_t)context, _tiff_read,
                             _tiff_write, _tiff_seek, _tiff_close,
                             _tiff_get_size, _tiff_map, _tiff_unmap);
  if (tif) {
    tif->tif_fd = (int)(intptr_t)context;
  }
  return tif;
}
void* _TIFFmalloc(tmsize_t size) {
  return FXMEM_DefaultAlloc(size, 0);
}
void _TIFFfree(void* ptr) {
  FXMEM_DefaultFree(ptr, 0);
}
void* _TIFFrealloc(void* ptr, tmsize_t size) {
  return FXMEM_DefaultRealloc(ptr, size, 0);
}
void _TIFFmemset(void* ptr, int val, tmsize_t size) {
  FXSYS_memset(ptr, val, (size_t)size);
}
void _TIFFmemcpy(void* des, const void* src, tmsize_t size) {
  FXSYS_memcpy(des, src, (size_t)size);
}
int _TIFFmemcmp(const void* ptr1, const void* ptr2, tmsize_t size) {
  return FXSYS_memcmp(ptr1, ptr2, (size_t)size);
}

TIFFErrorHandler _TIFFwarningHandler = nullptr;
TIFFErrorHandler _TIFFerrorHandler = nullptr;

int TIFFCmyk2Rgb(thandle_t context,
                 uint8 c,
                 uint8 m,
                 uint8 y,
                 uint8 k,
                 uint8* r,
                 uint8* g,
                 uint8* b) {
  if (context == NULL) {
    return 0;
  }
  CCodec_TiffContext* p = (CCodec_TiffContext*)context;
  if (p->icc_ctx) {
    unsigned char cmyk[4], bgr[3];
    cmyk[0] = c, cmyk[1] = m, cmyk[2] = y, cmyk[3] = k;
    IccLib_TranslateImage(p->icc_ctx, bgr, cmyk, 1);
    *r = bgr[2], *g = bgr[1], *b = bgr[0];
  } else {
    AdobeCMYK_to_sRGB1(c, m, y, k, *r, *g, *b);
  }
  return 1;
}
FX_BOOL CCodec_TiffContext::InitDecoder(IFX_FileRead* file_ptr) {
  io.in = file_ptr;
  tif_ctx = _tiff_open(this, "r");
  if (tif_ctx == NULL) {
    return FALSE;
  }
  return TRUE;
}
void CCodec_TiffContext::GetFrames(int32_t& frames) {
  frames = frame_num = TIFFNumberOfDirectories(tif_ctx);
}
#define TIFF_EXIF_GETINFO(key, T, tag)      \
  {                                         \
    T val = (T)0;                           \
    TIFFGetField(tif_ctx, tag, &val);       \
    if (val) {                              \
      (key) = FX_Alloc(uint8_t, sizeof(T)); \
      if ((key)) {                          \
        T* ptr = (T*)(key);                 \
        *ptr = val;                         \
        pExif->m_TagVal.SetAt(tag, (key));  \
      }                                     \
    }                                       \
  }                                         \
  (key) = NULL;
#define TIFF_EXIF_GETSTRINGINFO(key, tag)    \
  {                                          \
    uint32_t size = 0;                       \
    uint8_t* buf = NULL;                     \
    TIFFGetField(tif_ctx, tag, &size, &buf); \
    if (size && buf) {                       \
      (key) = FX_Alloc(uint8_t, size);       \
      if ((key)) {                           \
        FXSYS_memcpy((key), buf, size);      \
        pExif->m_TagVal.SetAt(tag, (key));   \
      }                                      \
    }                                        \
  }                                          \
  (key) = NULL;

namespace {

template <class T>
FX_BOOL Tiff_Exif_GetInfo(TIFF* tif_ctx, ttag_t tag, CFX_DIBAttribute* pAttr) {
  T val = 0;
  TIFFGetField(tif_ctx, tag, &val);
  if (!val)
    return FALSE;
  T* ptr = FX_Alloc(T, 1);
  *ptr = val;
  pAttr->m_Exif[tag] = (void*)ptr;
  return TRUE;
}
void Tiff_Exif_GetStringInfo(TIFF* tif_ctx,
                             ttag_t tag,
                             CFX_DIBAttribute* pAttr) {
  FX_CHAR* buf = nullptr;
  TIFFGetField(tif_ctx, tag, &buf);
  if (!buf)
    return;
  FX_STRSIZE size = FXSYS_strlen(buf);
  uint8_t* ptr = FX_Alloc(uint8_t, size + 1);
  FXSYS_memcpy(ptr, buf, size);
  ptr[size] = 0;
  pAttr->m_Exif[tag] = ptr;
}

}  // namespace

FX_BOOL CCodec_TiffContext::LoadFrameInfo(int32_t frame,
                                          uint32_t& width,
                                          uint32_t& height,
                                          uint32_t& comps,
                                          uint32_t& bpc,
                                          CFX_DIBAttribute* pAttribute) {
  if (!TIFFSetDirectory(tif_ctx, (uint16)frame)) {
    return FALSE;
  }
  uint16_t tif_cs;
  uint32_t tif_icc_size = 0;
  uint8_t* tif_icc_buf = NULL;
  uint16_t tif_bpc = 0;
  uint16_t tif_cps;
  uint32_t tif_rps;
  width = height = comps = 0;
  TIFFGetField(tif_ctx, TIFFTAG_IMAGEWIDTH, &width);
  TIFFGetField(tif_ctx, TIFFTAG_IMAGELENGTH, &height);
  TIFFGetField(tif_ctx, TIFFTAG_SAMPLESPERPIXEL, &comps);
  TIFFGetField(tif_ctx, TIFFTAG_BITSPERSAMPLE, &tif_bpc);
  TIFFGetField(tif_ctx, TIFFTAG_PHOTOMETRIC, &tif_cs);
  TIFFGetField(tif_ctx, TIFFTAG_COMPRESSION, &tif_cps);
  TIFFGetField(tif_ctx, TIFFTAG_ROWSPERSTRIP, &tif_rps);
  TIFFGetField(tif_ctx, TIFFTAG_ICCPROFILE, &tif_icc_size, &tif_icc_buf);
  if (pAttribute) {
    pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_INCH;
    if (TIFFGetField(tif_ctx, TIFFTAG_RESOLUTIONUNIT,
                     &pAttribute->m_wDPIUnit)) {
      pAttribute->m_wDPIUnit -= 1;
    }
    Tiff_Exif_GetInfo<uint16_t>(tif_ctx, TIFFTAG_ORIENTATION, pAttribute);
    if (Tiff_Exif_GetInfo<FX_FLOAT>(tif_ctx, TIFFTAG_XRESOLUTION, pAttribute)) {
      void* val = pAttribute->m_Exif[TIFFTAG_XRESOLUTION];
      FX_FLOAT fDpi = val ? *reinterpret_cast<FX_FLOAT*>(val) : 0;
      pAttribute->m_nXDPI = (int32_t)(fDpi + 0.5f);
    }
    if (Tiff_Exif_GetInfo<FX_FLOAT>(tif_ctx, TIFFTAG_YRESOLUTION, pAttribute)) {
      void* val = pAttribute->m_Exif[TIFFTAG_YRESOLUTION];
      FX_FLOAT fDpi = val ? *reinterpret_cast<FX_FLOAT*>(val) : 0;
      pAttribute->m_nYDPI = (int32_t)(fDpi + 0.5f);
    }
    Tiff_Exif_GetStringInfo(tif_ctx, TIFFTAG_IMAGEDESCRIPTION, pAttribute);
    Tiff_Exif_GetStringInfo(tif_ctx, TIFFTAG_MAKE, pAttribute);
    Tiff_Exif_GetStringInfo(tif_ctx, TIFFTAG_MODEL, pAttribute);
  }
  bpc = tif_bpc;
  if (tif_rps > height) {
    TIFFSetField(tif_ctx, TIFFTAG_ROWSPERSTRIP, tif_rps = height);
  }
  return TRUE;
}
void _TiffBGRA2RGBA(uint8_t* pBuf, int32_t pixel, int32_t spp) {
  for (int32_t n = 0; n < pixel; n++) {
    uint8_t tmp = pBuf[0];
    pBuf[0] = pBuf[2];
    pBuf[2] = tmp;
    pBuf += spp;
  }
}
FX_BOOL CCodec_TiffContext::isSupport(CFX_DIBitmap* pDIBitmap) {
  if (TIFFIsTiled(tif_ctx)) {
    return FALSE;
  }
  uint16_t photometric;
  if (!TIFFGetField(tif_ctx, TIFFTAG_PHOTOMETRIC, &photometric)) {
    return FALSE;
  }
  switch (pDIBitmap->GetBPP()) {
    case 1:
    case 8:
      if (photometric != PHOTOMETRIC_PALETTE) {
        return FALSE;
      }
      break;
    case 24:
      if (photometric != PHOTOMETRIC_RGB) {
        return FALSE;
      }
      break;
    default:
      return FALSE;
  }
  uint16_t planarconfig;
  if (!TIFFGetFieldDefaulted(tif_ctx, TIFFTAG_PLANARCONFIG, &planarconfig)) {
    return FALSE;
  }
  if (planarconfig == PLANARCONFIG_SEPARATE) {
    return FALSE;
  }
  return TRUE;
}
void CCodec_TiffContext::SetPalette(CFX_DIBitmap* pDIBitmap, uint16_t bps) {
  uint16_t *red_orig, *green_orig, *blue_orig;
  TIFFGetField(tif_ctx, TIFFTAG_COLORMAP, &red_orig, &green_orig, &blue_orig);
  for (int32_t i = (1L << bps) - 1; i >= 0; i--) {
#define CVT(x) ((uint16_t)((x) >> 8))
    red_orig[i] = CVT(red_orig[i]);
    green_orig[i] = CVT(green_orig[i]);
    blue_orig[i] = CVT(blue_orig[i]);
#undef CVT
  }
  int32_t len = 1 << bps;
  for (int32_t index = 0; index < len; index++) {
    uint32_t r = red_orig[index] & 0xFF;
    uint32_t g = green_orig[index] & 0xFF;
    uint32_t b = blue_orig[index] & 0xFF;
    uint32_t color = (uint32_t)b | ((uint32_t)g << 8) | ((uint32_t)r << 16) |
                     (((uint32)0xffL) << 24);
    pDIBitmap->SetPaletteEntry(index, color);
  }
}
FX_BOOL CCodec_TiffContext::Decode1bppRGB(CFX_DIBitmap* pDIBitmap,
                                          int32_t height,
                                          int32_t width,
                                          uint16_t bps,
                                          uint16_t spp) {
  if (pDIBitmap->GetBPP() != 1 || spp != 1 || bps != 1 ||
      !isSupport(pDIBitmap)) {
    return FALSE;
  }
  SetPalette(pDIBitmap, bps);
  int32_t size = (int32_t)TIFFScanlineSize(tif_ctx);
  uint8_t* buf = (uint8_t*)_TIFFmalloc(size);
  if (buf == NULL) {
    TIFFError(TIFFFileName(tif_ctx), "No space for scanline buffer");
    return FALSE;
  }
  uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer();
  uint32_t pitch = pDIBitmap->GetPitch();
  for (int32_t row = 0; row < height; row++) {
    TIFFReadScanline(tif_ctx, buf, row, 0);
    for (int32_t j = 0; j < size; j++) {
      bitMapbuffer[row * pitch + j] = buf[j];
    }
  }
  _TIFFfree(buf);
  return TRUE;
}
FX_BOOL CCodec_TiffContext::Decode8bppRGB(CFX_DIBitmap* pDIBitmap,
                                          int32_t height,
                                          int32_t width,
                                          uint16_t bps,
                                          uint16_t spp) {
  if (pDIBitmap->GetBPP() != 8 || spp != 1 || (bps != 4 && bps != 8) ||
      !isSupport(pDIBitmap)) {
    return FALSE;
  }
  SetPalette(pDIBitmap, bps);
  int32_t size = (int32_t)TIFFScanlineSize(tif_ctx);
  uint8_t* buf = (uint8_t*)_TIFFmalloc(size);
  if (buf == NULL) {
    TIFFError(TIFFFileName(tif_ctx), "No space for scanline buffer");
    return FALSE;
  }
  uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer();
  uint32_t pitch = pDIBitmap->GetPitch();
  for (int32_t row = 0; row < height; row++) {
    TIFFReadScanline(tif_ctx, buf, row, 0);
    for (int32_t j = 0; j < size; j++) {
      switch (bps) {
        case 4:
          bitMapbuffer[row * pitch + 2 * j + 0] = (buf[j] & 0xF0) >> 4;
          bitMapbuffer[row * pitch + 2 * j + 1] = (buf[j] & 0x0F) >> 0;
          break;
        case 8:
          bitMapbuffer[row * pitch + j] = buf[j];
          break;
      }
    }
  }
  _TIFFfree(buf);
  return TRUE;
}
FX_BOOL CCodec_TiffContext::Decode24bppRGB(CFX_DIBitmap* pDIBitmap,
                                           int32_t height,
                                           int32_t width,
                                           uint16_t bps,
                                           uint16_t spp) {
  if (pDIBitmap->GetBPP() != 24 || !isSupport(pDIBitmap)) {
    return FALSE;
  }
  int32_t size = (int32_t)TIFFScanlineSize(tif_ctx);
  uint8_t* buf = (uint8_t*)_TIFFmalloc(size);
  if (buf == NULL) {
    TIFFError(TIFFFileName(tif_ctx), "No space for scanline buffer");
    return FALSE;
  }
  uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer();
  uint32_t pitch = pDIBitmap->GetPitch();
  for (int32_t row = 0; row < height; row++) {
    TIFFReadScanline(tif_ctx, buf, row, 0);
    for (int32_t j = 0; j < size - 2; j += 3) {
      bitMapbuffer[row * pitch + j + 0] = buf[j + 2];
      bitMapbuffer[row * pitch + j + 1] = buf[j + 1];
      bitMapbuffer[row * pitch + j + 2] = buf[j + 0];
    }
  }
  _TIFFfree(buf);
  return TRUE;
}
FX_BOOL CCodec_TiffContext::Decode(CFX_DIBitmap* pDIBitmap) {
  uint32_t img_wid = pDIBitmap->GetWidth();
  uint32_t img_hei = pDIBitmap->GetHeight();
  uint32_t width = 0;
  uint32_t height = 0;
  TIFFGetField(tif_ctx, TIFFTAG_IMAGEWIDTH, &width);
  TIFFGetField(tif_ctx, TIFFTAG_IMAGELENGTH, &height);
  if (img_wid != width || img_hei != height) {
    return FALSE;
  }
  if (pDIBitmap->GetBPP() == 32) {
    uint16_t rotation = ORIENTATION_TOPLEFT;
    TIFFGetField(tif_ctx, TIFFTAG_ORIENTATION, &rotation);
    if (TIFFReadRGBAImageOriented(tif_ctx, img_wid, img_hei,
                                  (uint32*)pDIBitmap->GetBuffer(), rotation,
                                  1)) {
      for (uint32_t row = 0; row < img_hei; row++) {
        uint8_t* row_buf = (uint8_t*)pDIBitmap->GetScanline(row);
        _TiffBGRA2RGBA(row_buf, img_wid, 4);
      }
      return TRUE;
    }
  }
  uint16_t spp, bps;
  TIFFGetField(tif_ctx, TIFFTAG_SAMPLESPERPIXEL, &spp);
  TIFFGetField(tif_ctx, TIFFTAG_BITSPERSAMPLE, &bps);
  uint32_t bpp = bps * spp;
  if (bpp == 1) {
    return Decode1bppRGB(pDIBitmap, height, width, bps, spp);
  } else if (bpp <= 8) {
    return Decode8bppRGB(pDIBitmap, height, width, bps, spp);
  } else if (bpp <= 24) {
    return Decode24bppRGB(pDIBitmap, height, width, bps, spp);
  }
  return FALSE;
}
void* CCodec_TiffModule::CreateDecoder(IFX_FileRead* file_ptr) {
  CCodec_TiffContext* pDecoder = new CCodec_TiffContext;
  if (!pDecoder->InitDecoder(file_ptr)) {
    delete pDecoder;
    return NULL;
  }
  return pDecoder;
}
void CCodec_TiffModule::GetFrames(void* ctx, int32_t& frames) {
  CCodec_TiffContext* pDecoder = (CCodec_TiffContext*)ctx;
  pDecoder->GetFrames(frames);
}
FX_BOOL CCodec_TiffModule::LoadFrameInfo(void* ctx,
                                         int32_t frame,
                                         uint32_t& width,
                                         uint32_t& height,
                                         uint32_t& comps,
                                         uint32_t& bpc,
                                         CFX_DIBAttribute* pAttribute) {
  CCodec_TiffContext* pDecoder = (CCodec_TiffContext*)ctx;
  return pDecoder->LoadFrameInfo(frame, width, height, comps, bpc, pAttribute);
}
FX_BOOL CCodec_TiffModule::Decode(void* ctx, class CFX_DIBitmap* pDIBitmap) {
  CCodec_TiffContext* pDecoder = (CCodec_TiffContext*)ctx;
  return pDecoder->Decode(pDIBitmap);
}
void CCodec_TiffModule::DestroyDecoder(void* ctx) {
  CCodec_TiffContext* pDecoder = (CCodec_TiffContext*)ctx;
  delete pDecoder;
}