git.oblomov.eu Git - wine/blob - dlls/windowscodecs/jpegformat.c

   1 /*
   2  * Copyright 2009 Vincent Povirk for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20 #include "wine/port.h"
  21
  22 #ifdef HAVE_UNISTD_H
  23 # include <unistd.h>
  24 #endif
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <setjmp.h>
  29
  30 #ifdef SONAME_LIBJPEG
  31 /* This is a hack, so jpeglib.h does not redefine INT32 and the like*/
  32 #define XMD_H
  33 #define UINT8 JPEG_UINT8
  34 #define UINT16 JPEG_UINT16
  35 #define boolean jpeg_boolean
  36 #undef HAVE_STDLIB_H
  37 # include <jpeglib.h>
  38 #undef HAVE_STDLIB_H
  39 #define HAVE_STDLIB_H 1
  40 #undef UINT8
  41 #undef UINT16
  42 #undef boolean
  43 #endif
  44
  45 #define COBJMACROS
  46
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "objbase.h"
  50 #include "wincodec.h"
  51
  52 #include "wincodecs_private.h"
  53
  54 #include "wine/debug.h"
  55 #include "wine/library.h"
  56
  57 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  58 WINE_DECLARE_DEBUG_CHANNEL(jpeg);
  59
  60 #ifdef SONAME_LIBJPEG
  61
  62 static void *libjpeg_handle;
  63
  64 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  65 MAKE_FUNCPTR(jpeg_CreateDecompress);
  66 MAKE_FUNCPTR(jpeg_destroy_decompress);
  67 MAKE_FUNCPTR(jpeg_read_header);
  68 MAKE_FUNCPTR(jpeg_read_scanlines);
  69 MAKE_FUNCPTR(jpeg_resync_to_restart);
  70 MAKE_FUNCPTR(jpeg_start_decompress);
  71 MAKE_FUNCPTR(jpeg_std_error);
  72 #undef MAKE_FUNCPTR
  73
  74 static void *load_libjpeg(void)
  75 {
  76     if((libjpeg_handle = wine_dlopen(SONAME_LIBJPEG, RTLD_NOW, NULL, 0)) != NULL) {
  77
  78 #define LOAD_FUNCPTR(f) \
  79     if((p##f = wine_dlsym(libjpeg_handle, #f, NULL, 0)) == NULL) { \
  80         libjpeg_handle = NULL; \
  81         return NULL; \
  82     }
  83
  84         LOAD_FUNCPTR(jpeg_CreateDecompress);
  85         LOAD_FUNCPTR(jpeg_destroy_decompress);
  86         LOAD_FUNCPTR(jpeg_read_header);
  87         LOAD_FUNCPTR(jpeg_read_scanlines);
  88         LOAD_FUNCPTR(jpeg_resync_to_restart);
  89         LOAD_FUNCPTR(jpeg_start_decompress);
  90         LOAD_FUNCPTR(jpeg_std_error);
  91 #undef LOAD_FUNCPTR
  92     }
  93     return libjpeg_handle;
  94 }
  95
  96 static void error_exit_fn(j_common_ptr cinfo)
  97 {
  98     char message[JMSG_LENGTH_MAX];
  99     if (ERR_ON(jpeg))
 100     {
 101         cinfo->err->format_message(cinfo, message);
 102         ERR_(jpeg)("%s\n", message);
 103     }
 104     longjmp(*(jmp_buf*)cinfo->client_data, 1);
 105 }
 106
 107 static void emit_message_fn(j_common_ptr cinfo, int msg_level)
 108 {
 109     char message[JMSG_LENGTH_MAX];
 110
 111     if (msg_level < 0 && ERR_ON(jpeg))
 112     {
 113         cinfo->err->format_message(cinfo, message);
 114         ERR_(jpeg)("%s\n", message);
 115     }
 116     else if (msg_level == 0 && WARN_ON(jpeg))
 117     {
 118         cinfo->err->format_message(cinfo, message);
 119         WARN_(jpeg)("%s\n", message);
 120     }
 121     else if (msg_level > 0 && TRACE_ON(jpeg))
 122     {
 123         cinfo->err->format_message(cinfo, message);
 124         TRACE_(jpeg)("%s\n", message);
 125     }
 126 }
 127
 128 typedef struct {
 129     const IWICBitmapDecoderVtbl *lpVtbl;
 130     const IWICBitmapFrameDecodeVtbl *lpFrameVtbl;
 131     LONG ref;
 132     BOOL initialized;
 133     BOOL cinfo_initialized;
 134     IStream *stream;
 135     struct jpeg_decompress_struct cinfo;
 136     struct jpeg_error_mgr jerr;
 137     struct jpeg_source_mgr source_mgr;
 138     BYTE source_buffer[1024];
 139     BYTE *image_data;
 140     CRITICAL_SECTION lock;
 141 } JpegDecoder;
 142
 143 static inline JpegDecoder *decoder_from_decompress(j_decompress_ptr decompress)
 144 {
 145     return CONTAINING_RECORD(decompress, JpegDecoder, cinfo);
 146 }
 147
 148 static inline JpegDecoder *decoder_from_frame(IWICBitmapFrameDecode *iface)
 149 {
 150     return CONTAINING_RECORD(iface, JpegDecoder, lpFrameVtbl);
 151 }
 152
 153 static HRESULT WINAPI JpegDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
 154     void **ppv)
 155 {
 156     JpegDecoder *This = (JpegDecoder*)iface;
 157     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 158
 159     if (!ppv) return E_INVALIDARG;
 160
 161     if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
 162     {
 163         *ppv = This;
 164     }
 165     else
 166     {
 167         *ppv = NULL;
 168         return E_NOINTERFACE;
 169     }
 170
 171     IUnknown_AddRef((IUnknown*)*ppv);
 172     return S_OK;
 173 }
 174
 175 static ULONG WINAPI JpegDecoder_AddRef(IWICBitmapDecoder *iface)
 176 {
 177     JpegDecoder *This = (JpegDecoder*)iface;
 178     ULONG ref = InterlockedIncrement(&This->ref);
 179
 180     TRACE("(%p) refcount=%u\n", iface, ref);
 181
 182     return ref;
 183 }
 184
 185 static ULONG WINAPI JpegDecoder_Release(IWICBitmapDecoder *iface)
 186 {
 187     JpegDecoder *This = (JpegDecoder*)iface;
 188     ULONG ref = InterlockedDecrement(&This->ref);
 189
 190     TRACE("(%p) refcount=%u\n", iface, ref);
 191
 192     if (ref == 0)
 193     {
 194         This->lock.DebugInfo->Spare[0] = 0;
 195         DeleteCriticalSection(&This->lock);
 196         if (This->cinfo_initialized) pjpeg_destroy_decompress(&This->cinfo);
 197         if (This->stream) IStream_Release(This->stream);
 198         HeapFree(GetProcessHeap(), 0, This->image_data);
 199         HeapFree(GetProcessHeap(), 0, This);
 200     }
 201
 202     return ref;
 203 }
 204
 205 static HRESULT WINAPI JpegDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
 206     DWORD *pdwCapability)
 207 {
 208     FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
 209     return E_NOTIMPL;
 210 }
 211
 212 static void source_mgr_init_source(j_decompress_ptr cinfo)
 213 {
 214 }
 215
 216 static jpeg_boolean source_mgr_fill_input_buffer(j_decompress_ptr cinfo)
 217 {
 218     JpegDecoder *This = decoder_from_decompress(cinfo);
 219     HRESULT hr;
 220     ULONG bytesread;
 221
 222     hr = IStream_Read(This->stream, This->source_buffer, 1024, &bytesread);
 223
 224     if (hr != S_OK || bytesread == 0)
 225     {
 226         return FALSE;
 227     }
 228     else
 229     {
 230         This->source_mgr.next_input_byte = This->source_buffer;
 231         This->source_mgr.bytes_in_buffer = bytesread;
 232         return TRUE;
 233     }
 234 }
 235
 236 static void source_mgr_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
 237 {
 238     JpegDecoder *This = decoder_from_decompress(cinfo);
 239     LARGE_INTEGER seek;
 240
 241     if (num_bytes > This->source_mgr.bytes_in_buffer)
 242     {
 243         seek.QuadPart = num_bytes - This->source_mgr.bytes_in_buffer;
 244         IStream_Seek(This->stream, seek, STREAM_SEEK_CUR, NULL);
 245         This->source_mgr.bytes_in_buffer = 0;
 246     }
 247     else if (num_bytes > 0)
 248     {
 249         This->source_mgr.next_input_byte += num_bytes;
 250         This->source_mgr.bytes_in_buffer -= num_bytes;
 251     }
 252 }
 253
 254 static void source_mgr_term_source(j_decompress_ptr cinfo)
 255 {
 256 }
 257
 258 static HRESULT WINAPI JpegDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 259     WICDecodeOptions cacheOptions)
 260 {
 261     JpegDecoder *This = (JpegDecoder*)iface;
 262     int ret;
 263     LARGE_INTEGER seek;
 264     jmp_buf jmpbuf;
 265     TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
 266
 267     EnterCriticalSection(&This->lock);
 268
 269     if (This->cinfo_initialized)
 270     {
 271         LeaveCriticalSection(&This->lock);
 272         return WINCODEC_ERR_WRONGSTATE;
 273     }
 274
 275     pjpeg_std_error(&This->jerr);
 276
 277     This->jerr.error_exit = error_exit_fn;
 278     This->jerr.emit_message = emit_message_fn;
 279
 280     This->cinfo.err = &This->jerr;
 281
 282     This->cinfo.client_data = &jmpbuf;
 283
 284     if (setjmp(jmpbuf))
 285     {
 286         LeaveCriticalSection(&This->lock);
 287         return E_FAIL;
 288     }
 289
 290     pjpeg_CreateDecompress(&This->cinfo, JPEG_LIB_VERSION, sizeof(struct jpeg_decompress_struct));
 291
 292     This->cinfo_initialized = TRUE;
 293
 294     This->stream = pIStream;
 295     IStream_AddRef(pIStream);
 296
 297     seek.QuadPart = 0;
 298     IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
 299
 300     This->source_mgr.bytes_in_buffer = 0;
 301     This->source_mgr.init_source = source_mgr_init_source;
 302     This->source_mgr.fill_input_buffer = source_mgr_fill_input_buffer;
 303     This->source_mgr.skip_input_data = source_mgr_skip_input_data;
 304     This->source_mgr.resync_to_restart = pjpeg_resync_to_restart;
 305     This->source_mgr.term_source = source_mgr_term_source;
 306
 307     This->cinfo.src = &This->source_mgr;
 308
 309     ret = pjpeg_read_header(&This->cinfo, TRUE);
 310
 311     if (ret != JPEG_HEADER_OK) {
 312         WARN("Jpeg image in stream has bad format, read header returned %d.\n",ret);
 313         LeaveCriticalSection(&This->lock);
 314         return E_FAIL;
 315     }
 316
 317     switch (This->cinfo.jpeg_color_space)
 318     {
 319     case JCS_GRAYSCALE:
 320         This->cinfo.out_color_space = JCS_GRAYSCALE;
 321         break;
 322     case JCS_RGB:
 323     case JCS_YCbCr:
 324         This->cinfo.out_color_space = JCS_RGB;
 325         break;
 326     case JCS_CMYK:
 327     case JCS_YCCK:
 328         This->cinfo.out_color_space = JCS_CMYK;
 329         break;
 330     default:
 331         ERR("Unknown JPEG color space %i\n", This->cinfo.jpeg_color_space);
 332         LeaveCriticalSection(&This->lock);
 333         return E_FAIL;
 334     }
 335
 336     if (!pjpeg_start_decompress(&This->cinfo))
 337     {
 338         ERR("jpeg_start_decompress failed\n");
 339         LeaveCriticalSection(&This->lock);
 340         return E_FAIL;
 341     }
 342
 343     This->initialized = TRUE;
 344
 345     LeaveCriticalSection(&This->lock);
 346
 347     return S_OK;
 348 }
 349
 350 static HRESULT WINAPI JpegDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 351     GUID *pguidContainerFormat)
 352 {
 353     memcpy(pguidContainerFormat, &GUID_ContainerFormatJpeg, sizeof(GUID));
 354     return S_OK;
 355 }
 356
 357 static HRESULT WINAPI JpegDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 358     IWICBitmapDecoderInfo **ppIDecoderInfo)
 359 {
 360     FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
 361     return E_NOTIMPL;
 362 }
 363
 364 static HRESULT WINAPI JpegDecoder_CopyPalette(IWICBitmapDecoder *iface,
 365     IWICPalette *pIPalette)
 366 {
 367     TRACE("(%p,%p)\n", iface, pIPalette);
 368
 369     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 370 }
 371
 372 static HRESULT WINAPI JpegDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 373     IWICMetadataQueryReader **ppIMetadataQueryReader)
 374 {
 375     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 376     return E_NOTIMPL;
 377 }
 378
 379 static HRESULT WINAPI JpegDecoder_GetPreview(IWICBitmapDecoder *iface,
 380     IWICBitmapSource **ppIBitmapSource)
 381 {
 382     FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
 383     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 384 }
 385
 386 static HRESULT WINAPI JpegDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 387     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 388 {
 389     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 390     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 391 }
 392
 393 static HRESULT WINAPI JpegDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 394     IWICBitmapSource **ppIThumbnail)
 395 {
 396     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 397     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 398 }
 399
 400 static HRESULT WINAPI JpegDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 401     UINT *pCount)
 402 {
 403     *pCount = 1;
 404     return S_OK;
 405 }
 406
 407 static HRESULT WINAPI JpegDecoder_GetFrame(IWICBitmapDecoder *iface,
 408     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 409 {
 410     JpegDecoder *This = (JpegDecoder*)iface;
 411     TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
 412
 413     if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
 414
 415     if (index != 0) return E_INVALIDARG;
 416
 417     IWICBitmapDecoder_AddRef(iface);
 418     *ppIBitmapFrame = (IWICBitmapFrameDecode*)&This->lpFrameVtbl;
 419
 420     return S_OK;
 421 }
 422
 423 static const IWICBitmapDecoderVtbl JpegDecoder_Vtbl = {
 424     JpegDecoder_QueryInterface,
 425     JpegDecoder_AddRef,
 426     JpegDecoder_Release,
 427     JpegDecoder_QueryCapability,
 428     JpegDecoder_Initialize,
 429     JpegDecoder_GetContainerFormat,
 430     JpegDecoder_GetDecoderInfo,
 431     JpegDecoder_CopyPalette,
 432     JpegDecoder_GetMetadataQueryReader,
 433     JpegDecoder_GetPreview,
 434     JpegDecoder_GetColorContexts,
 435     JpegDecoder_GetThumbnail,
 436     JpegDecoder_GetFrameCount,
 437     JpegDecoder_GetFrame
 438 };
 439
 440 static HRESULT WINAPI JpegDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
 441     void **ppv)
 442 {
 443     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 444
 445     if (!ppv) return E_INVALIDARG;
 446
 447     if (IsEqualIID(&IID_IUnknown, iid) ||
 448         IsEqualIID(&IID_IWICBitmapSource, iid) ||
 449         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
 450     {
 451         *ppv = iface;
 452     }
 453     else
 454     {
 455         *ppv = NULL;
 456         return E_NOINTERFACE;
 457     }
 458
 459     IUnknown_AddRef((IUnknown*)*ppv);
 460     return S_OK;
 461 }
 462
 463 static ULONG WINAPI JpegDecoder_Frame_AddRef(IWICBitmapFrameDecode *iface)
 464 {
 465     JpegDecoder *This = decoder_from_frame(iface);
 466     return IUnknown_AddRef((IUnknown*)This);
 467 }
 468
 469 static ULONG WINAPI JpegDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
 470 {
 471     JpegDecoder *This = decoder_from_frame(iface);
 472     return IUnknown_Release((IUnknown*)This);
 473 }
 474
 475 static HRESULT WINAPI JpegDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
 476     UINT *puiWidth, UINT *puiHeight)
 477 {
 478     JpegDecoder *This = decoder_from_frame(iface);
 479     *puiWidth = This->cinfo.output_width;
 480     *puiHeight = This->cinfo.output_height;
 481     TRACE("(%p)->(%u,%u)\n", iface, *puiWidth, *puiHeight);
 482     return S_OK;
 483 }
 484
 485 static HRESULT WINAPI JpegDecoder_Frame_GetPixelFormat(IWICBitmapFrameDecode *iface,
 486     WICPixelFormatGUID *pPixelFormat)
 487 {
 488     JpegDecoder *This = decoder_from_frame(iface);
 489     TRACE("(%p,%p)\n", iface, pPixelFormat);
 490     if (This->cinfo.out_color_space == JCS_RGB)
 491         memcpy(pPixelFormat, &GUID_WICPixelFormat24bppBGR, sizeof(GUID));
 492     else if (This->cinfo.out_color_space == JCS_CMYK)
 493         memcpy(pPixelFormat, &GUID_WICPixelFormat32bppCMYK, sizeof(GUID));
 494     else /* This->cinfo.out_color_space == JCS_GRAYSCALE */
 495         memcpy(pPixelFormat, &GUID_WICPixelFormat8bppGray, sizeof(GUID));
 496     return S_OK;
 497 }
 498
 499 static HRESULT WINAPI JpegDecoder_Frame_GetResolution(IWICBitmapFrameDecode *iface,
 500     double *pDpiX, double *pDpiY)
 501 {
 502     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 503     return E_NOTIMPL;
 504 }
 505
 506 static HRESULT WINAPI JpegDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
 507     IWICPalette *pIPalette)
 508 {
 509     FIXME("(%p,%p): stub\n", iface, pIPalette);
 510     return E_NOTIMPL;
 511 }
 512
 513 static HRESULT WINAPI JpegDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
 514     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 515 {
 516     JpegDecoder *This = decoder_from_frame(iface);
 517     UINT bpp;
 518     UINT stride;
 519     UINT data_size;
 520     UINT max_row_needed;
 521     jmp_buf jmpbuf;
 522     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 523
 524     if (This->cinfo.out_color_space == JCS_GRAYSCALE) bpp = 8;
 525     else if (This->cinfo.out_color_space == JCS_CMYK) bpp = 32;
 526     else bpp = 24;
 527
 528     stride = bpp * This->cinfo.output_width;
 529     data_size = stride * This->cinfo.output_height;
 530
 531     max_row_needed = prc->Y + prc->Height;
 532     if (max_row_needed > This->cinfo.output_height) return E_INVALIDARG;
 533
 534     EnterCriticalSection(&This->lock);
 535
 536     if (!This->image_data)
 537     {
 538         This->image_data = HeapAlloc(GetProcessHeap(), 0, data_size);
 539         if (!This->image_data)
 540         {
 541             LeaveCriticalSection(&This->lock);
 542             return E_OUTOFMEMORY;
 543         }
 544     }
 545
 546     This->cinfo.client_data = &jmpbuf;
 547
 548     if (setjmp(jmpbuf))
 549     {
 550         LeaveCriticalSection(&This->lock);
 551         return E_FAIL;
 552     }
 553
 554     while (max_row_needed > This->cinfo.output_scanline)
 555     {
 556         UINT first_scanline = This->cinfo.output_scanline;
 557         UINT max_rows;
 558         JSAMPROW out_rows[4];
 559         UINT i, j;
 560         JDIMENSION ret;
 561
 562         max_rows = min(This->cinfo.output_height-first_scanline, 4);
 563         for (i=0; i<max_rows; i++)
 564             out_rows[i] = This->image_data + stride * (first_scanline+i);
 565
 566         ret = pjpeg_read_scanlines(&This->cinfo, out_rows, max_rows);
 567
 568         if (ret == 0)
 569         {
 570             ERR("read_scanlines failed\n");
 571             LeaveCriticalSection(&This->lock);
 572             return E_FAIL;
 573         }
 574
 575         if (bpp == 24)
 576         {
 577             /* libjpeg gives us RGB data and we want BGR, so byteswap the data */
 578             for (i=first_scanline; i<This->cinfo.output_scanline; i++)
 579             {
 580                 BYTE *pixel = This->image_data + stride * i;
 581                 for (j=0; j<This->cinfo.output_width; j++)
 582                 {
 583                     BYTE red=pixel[0];
 584                     BYTE blue=pixel[2];
 585                     pixel[0]=blue;
 586                     pixel[2]=red;
 587                     pixel+=3;
 588                 }
 589             }
 590         }
 591
 592         if (This->cinfo.out_color_space == JCS_CMYK && This->cinfo.saw_Adobe_marker)
 593             /* Adobe JPEG's have inverted CMYK data. */
 594             for (i=0; i<data_size; i++)
 595                 This->image_data[i] ^= 0xff;
 596     }
 597
 598     LeaveCriticalSection(&This->lock);
 599
 600     return copy_pixels(bpp, This->image_data,
 601         This->cinfo.output_width, This->cinfo.output_height, stride,
 602         prc, cbStride, cbBufferSize, pbBuffer);
 603 }
 604
 605 static HRESULT WINAPI JpegDecoder_Frame_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 606     IWICMetadataQueryReader **ppIMetadataQueryReader)
 607 {
 608     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 609     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 610 }
 611
 612 static HRESULT WINAPI JpegDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
 613     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 614 {
 615     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 616     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 617 }
 618
 619 static HRESULT WINAPI JpegDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
 620     IWICBitmapSource **ppIThumbnail)
 621 {
 622     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 623     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 624 }
 625
 626 static const IWICBitmapFrameDecodeVtbl JpegDecoder_Frame_Vtbl = {
 627     JpegDecoder_Frame_QueryInterface,
 628     JpegDecoder_Frame_AddRef,
 629     JpegDecoder_Frame_Release,
 630     JpegDecoder_Frame_GetSize,
 631     JpegDecoder_Frame_GetPixelFormat,
 632     JpegDecoder_Frame_GetResolution,
 633     JpegDecoder_Frame_CopyPalette,
 634     JpegDecoder_Frame_CopyPixels,
 635     JpegDecoder_Frame_GetMetadataQueryReader,
 636     JpegDecoder_Frame_GetColorContexts,
 637     JpegDecoder_Frame_GetThumbnail
 638 };
 639
 640 HRESULT JpegDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 641 {
 642     JpegDecoder *This;
 643     HRESULT ret;
 644
 645     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 646
 647     if (!libjpeg_handle && !load_libjpeg())
 648     {
 649         ERR("Failed reading JPEG because unable to find %s\n", SONAME_LIBJPEG);
 650         return E_FAIL;
 651     }
 652
 653     *ppv = NULL;
 654
 655     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 656
 657     This = HeapAlloc(GetProcessHeap(), 0, sizeof(JpegDecoder));
 658     if (!This) return E_OUTOFMEMORY;
 659
 660     This->lpVtbl = &JpegDecoder_Vtbl;
 661     This->lpFrameVtbl = &JpegDecoder_Frame_Vtbl;
 662     This->ref = 1;
 663     This->initialized = FALSE;
 664     This->cinfo_initialized = FALSE;
 665     This->stream = NULL;
 666     This->image_data = NULL;
 667     InitializeCriticalSection(&This->lock);
 668     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": JpegDecoder.lock");
 669
 670     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 671     IUnknown_Release((IUnknown*)This);
 672
 673     return ret;
 674 }
 675
 676 #else /* !defined(SONAME_LIBJPEG) */
 677
 678 HRESULT JpegDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 679 {
 680     ERR("Trying to load JPEG picture, but JPEG support is not compiled in.\n");
 681     return E_FAIL;
 682 }
 683
 684 #endif