git.oblomov.eu Git - wine/blob - dlls/windowscodecs/icoformat.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
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "objbase.h"
  29 #include "wincodec.h"
  30
  31 #include "wincodecs_private.h"
  32
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  36
  37 #include "pshpack1.h"
  38
  39 typedef struct {
  40     BYTE bWidth;
  41     BYTE bHeight;
  42     BYTE bColorCount;
  43     BYTE bReserved;
  44     WORD wPlanes;
  45     WORD wBitCount;
  46     DWORD dwDIBSize;
  47     DWORD dwDIBOffset;
  48 } ICONDIRENTRY;
  49
  50 typedef struct
  51 {
  52     WORD idReserved;
  53     WORD idType;
  54     WORD idCount;
  55 } ICONHEADER;
  56
  57 #include "poppack.h"
  58
  59 typedef struct {
  60     IWICBitmapDecoder IWICBitmapDecoder_iface;
  61     LONG ref;
  62     BOOL initialized;
  63     IStream *stream;
  64     ICONHEADER header;
  65     CRITICAL_SECTION lock; /* must be held when accessing stream */
  66 } IcoDecoder;
  67
  68 typedef struct {
  69     IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
  70     LONG ref;
  71     UINT width, height;
  72     double dpiX, dpiY;
  73     BYTE *bits;
  74 } IcoFrameDecode;
  75
  76 static inline IcoDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
  77 {
  78     return CONTAINING_RECORD(iface, IcoDecoder, IWICBitmapDecoder_iface);
  79 }
  80
  81 static inline IcoFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
  82 {
  83     return CONTAINING_RECORD(iface, IcoFrameDecode, IWICBitmapFrameDecode_iface);
  84 }
  85
  86 static HRESULT WINAPI IcoFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
  87     void **ppv)
  88 {
  89     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
  90     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  91
  92     if (!ppv) return E_INVALIDARG;
  93
  94     if (IsEqualIID(&IID_IUnknown, iid) ||
  95         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  96         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
  97     {
  98         *ppv = &This->IWICBitmapFrameDecode_iface;
  99     }
 100     else
 101     {
 102         *ppv = NULL;
 103         return E_NOINTERFACE;
 104     }
 105
 106     IUnknown_AddRef((IUnknown*)*ppv);
 107     return S_OK;
 108 }
 109
 110 static ULONG WINAPI IcoFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
 111 {
 112     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
 113     ULONG ref = InterlockedIncrement(&This->ref);
 114
 115     TRACE("(%p) refcount=%u\n", iface, ref);
 116
 117     return ref;
 118 }
 119
 120 static ULONG WINAPI IcoFrameDecode_Release(IWICBitmapFrameDecode *iface)
 121 {
 122     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
 123     ULONG ref = InterlockedDecrement(&This->ref);
 124
 125     TRACE("(%p) refcount=%u\n", iface, ref);
 126
 127     if (ref == 0)
 128     {
 129         HeapFree(GetProcessHeap(), 0, This->bits);
 130         HeapFree(GetProcessHeap(), 0, This);
 131     }
 132
 133     return ref;
 134 }
 135
 136 static HRESULT WINAPI IcoFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
 137     UINT *puiWidth, UINT *puiHeight)
 138 {
 139     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
 140
 141     *puiWidth = This->width;
 142     *puiHeight = This->height;
 143
 144     TRACE("(%p) -> (%i,%i)\n", iface, *puiWidth, *puiHeight);
 145
 146     return S_OK;
 147 }
 148
 149 static HRESULT WINAPI IcoFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
 150     WICPixelFormatGUID *pPixelFormat)
 151 {
 152     memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
 153     return S_OK;
 154 }
 155
 156 static HRESULT WINAPI IcoFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
 157     double *pDpiX, double *pDpiY)
 158 {
 159     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
 160
 161     *pDpiX = This->dpiX;
 162     *pDpiY = This->dpiY;
 163
 164     TRACE("(%p) -> (%f,%f)\n", iface, *pDpiX, *pDpiY);
 165
 166     return S_OK;
 167 }
 168
 169 static HRESULT WINAPI IcoFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
 170     IWICPalette *pIPalette)
 171 {
 172     TRACE("(%p,%p)\n", iface, pIPalette);
 173     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 174 }
 175
 176 static HRESULT WINAPI IcoFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
 177     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 178 {
 179     IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
 180     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 181
 182     return copy_pixels(32, This->bits, This->width, This->height, This->width * 4,
 183         prc, cbStride, cbBufferSize, pbBuffer);
 184 }
 185
 186 static HRESULT WINAPI IcoFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 187     IWICMetadataQueryReader **ppIMetadataQueryReader)
 188 {
 189     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 190     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 191 }
 192
 193 static HRESULT WINAPI IcoFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
 194     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 195 {
 196     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 197     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 198 }
 199
 200 static HRESULT WINAPI IcoFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
 201     IWICBitmapSource **ppIThumbnail)
 202 {
 203     FIXME("(%p,%p)\n", iface, ppIThumbnail);
 204     return E_NOTIMPL;
 205 }
 206
 207 static const IWICBitmapFrameDecodeVtbl IcoFrameDecode_Vtbl = {
 208     IcoFrameDecode_QueryInterface,
 209     IcoFrameDecode_AddRef,
 210     IcoFrameDecode_Release,
 211     IcoFrameDecode_GetSize,
 212     IcoFrameDecode_GetPixelFormat,
 213     IcoFrameDecode_GetResolution,
 214     IcoFrameDecode_CopyPalette,
 215     IcoFrameDecode_CopyPixels,
 216     IcoFrameDecode_GetMetadataQueryReader,
 217     IcoFrameDecode_GetColorContexts,
 218     IcoFrameDecode_GetThumbnail
 219 };
 220
 221 static inline void pixel_set_trans(DWORD* pixel, BOOL transparent)
 222 {
 223     if (transparent) *pixel = 0;
 224     else *pixel |= 0xff000000;
 225 }
 226
 227 static HRESULT ReadIcoDib(IStream *stream, IcoFrameDecode *result)
 228 {
 229     HRESULT hr;
 230     BmpDecoder *bmp_decoder;
 231     IWICBitmapDecoder *decoder;
 232     IWICBitmapFrameDecode *framedecode;
 233     WICPixelFormatGUID pixelformat;
 234     IWICBitmapSource *source;
 235     int has_alpha=FALSE; /* if TRUE, alpha data might be in the image data */
 236     WICRect rc;
 237
 238     hr = IcoDibDecoder_CreateInstance(&bmp_decoder);
 239     if (SUCCEEDED(hr))
 240     {
 241         BmpDecoder_GetWICDecoder(bmp_decoder, &decoder);
 242         hr = IWICBitmapDecoder_Initialize(decoder, stream, WICDecodeMetadataCacheOnLoad);
 243
 244         if (SUCCEEDED(hr))
 245             hr = IWICBitmapDecoder_GetFrame(decoder, 0, &framedecode);
 246
 247         if (SUCCEEDED(hr))
 248         {
 249             hr = IWICBitmapFrameDecode_GetSize(framedecode, &result->width, &result->height);
 250
 251             if (SUCCEEDED(hr))
 252             {
 253                 result->bits = HeapAlloc(GetProcessHeap(), 0, result->width * result->height * 4);
 254                 if (!result->bits) hr = E_OUTOFMEMORY;
 255             }
 256
 257             if (SUCCEEDED(hr))
 258                 hr = IWICBitmapFrameDecode_GetPixelFormat(framedecode, &pixelformat);
 259
 260             if (IsEqualGUID(&pixelformat, &GUID_WICPixelFormat32bppBGR) ||
 261                 IsEqualGUID(&pixelformat, &GUID_WICPixelFormat32bppBGRA))
 262             {
 263                 source = (IWICBitmapSource*)framedecode;
 264                 IWICBitmapSource_AddRef(source);
 265                 has_alpha = TRUE;
 266             }
 267             else
 268             {
 269                 hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
 270                     (IWICBitmapSource*)framedecode, &source);
 271                 has_alpha = FALSE;
 272             }
 273
 274             if (SUCCEEDED(hr))
 275             {
 276                 rc.X = 0;
 277                 rc.Y = 0;
 278                 rc.Width = result->width;
 279                 rc.Height = result->height;
 280                 hr = IWICBitmapSource_CopyPixels(source, &rc, result->width * 4,
 281                     result->width * result->height * 4, result->bits);
 282
 283                 IWICBitmapSource_Release(source);
 284             }
 285
 286             if (SUCCEEDED(hr))
 287                 hr = IWICBitmapFrameDecode_GetResolution(framedecode, &result->dpiX, &result->dpiY);
 288
 289             IWICBitmapFrameDecode_Release(framedecode);
 290         }
 291
 292         if (SUCCEEDED(hr) && has_alpha)
 293         {
 294             /* If the alpha channel is fully transparent, we should ignore it. */
 295             int nonzero_alpha = 0;
 296             int i;
 297
 298             for (i=0; i<(result->height*result->width); i++)
 299             {
 300                 if (result->bits[i*4+3] != 0)
 301                 {
 302                     nonzero_alpha = 1;
 303                     break;
 304                 }
 305             }
 306
 307             if (!nonzero_alpha)
 308             {
 309                 for (i=0; i<(result->height*result->width); i++)
 310                     result->bits[i*4+3] = 0xff;
 311
 312                 has_alpha = FALSE;
 313             }
 314         }
 315
 316         if (SUCCEEDED(hr) && !has_alpha)
 317         {
 318             /* set alpha data based on the AND mask */
 319             UINT andBytesPerRow = (result->width+31)/32*4;
 320             UINT andBytes = andBytesPerRow * result->height;
 321             INT andStride;
 322             BYTE *tempdata=NULL;
 323             BYTE *andRow;
 324             BYTE *bitsRow;
 325             UINT bitsStride = result->width * 4;
 326             UINT x, y;
 327             ULONG offset;
 328             ULONG bytesread;
 329             LARGE_INTEGER seek;
 330             int topdown;
 331
 332             BmpDecoder_FindIconMask(bmp_decoder, &offset, &topdown);
 333
 334             if (offset)
 335             {
 336                 seek.QuadPart = offset;
 337
 338                 hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, 0);
 339
 340                 if (SUCCEEDED(hr))
 341                 {
 342                     tempdata = HeapAlloc(GetProcessHeap(), 0, andBytes);
 343                     if (!tempdata) hr = E_OUTOFMEMORY;
 344                 }
 345
 346                 if (SUCCEEDED(hr))
 347                     hr = IStream_Read(stream, tempdata, andBytes, &bytesread);
 348
 349                 if (SUCCEEDED(hr) && bytesread == andBytes)
 350                 {
 351                     if (topdown)
 352                     {
 353                         andStride = andBytesPerRow;
 354                         andRow = tempdata;
 355                     }
 356                     else
 357                     {
 358                         andStride = -andBytesPerRow;
 359                         andRow = tempdata + (result->height-1)*andBytesPerRow;
 360                     }
 361
 362                     bitsRow = result->bits;
 363                     for (y=0; y<result->height; y++) {
 364                         BYTE *andByte=andRow;
 365                         DWORD *bitsPixel=(DWORD*)bitsRow;
 366                         for (x=0; x<result->width; x+=8) {
 367                             BYTE andVal=*andByte++;
 368                             pixel_set_trans(bitsPixel++, andVal>>7&1);
 369                             if (x+1 < result->width) pixel_set_trans(bitsPixel++, andVal>>6&1);
 370                             if (x+2 < result->width) pixel_set_trans(bitsPixel++, andVal>>5&1);
 371                             if (x+3 < result->width) pixel_set_trans(bitsPixel++, andVal>>4&1);
 372                             if (x+4 < result->width) pixel_set_trans(bitsPixel++, andVal>>3&1);
 373                             if (x+5 < result->width) pixel_set_trans(bitsPixel++, andVal>>2&1);
 374                             if (x+6 < result->width) pixel_set_trans(bitsPixel++, andVal>>1&1);
 375                             if (x+7 < result->width) pixel_set_trans(bitsPixel++, andVal&1);
 376                         }
 377                         andRow += andStride;
 378                         bitsRow += bitsStride;
 379                     }
 380                 }
 381
 382                 HeapFree(GetProcessHeap(), 0, tempdata);
 383             }
 384         }
 385
 386         IWICBitmapDecoder_Release(decoder);
 387     }
 388
 389     return hr;
 390 }
 391
 392 static HRESULT ReadIcoPng(IStream *stream, IcoFrameDecode *result)
 393 {
 394     IWICBitmapDecoder *decoder = NULL;
 395     IWICBitmapFrameDecode *sourceFrame = NULL;
 396     IWICBitmapSource *sourceBitmap = NULL;
 397     WICRect rect;
 398     HRESULT hr;
 399
 400     hr = PngDecoder_CreateInstance(NULL, &IID_IWICBitmapDecoder, (void**)&decoder);
 401     if (FAILED(hr))
 402         goto end;
 403     hr = IWICBitmapDecoder_Initialize(decoder, stream, WICDecodeMetadataCacheOnLoad);
 404     if (FAILED(hr))
 405         goto end;
 406     hr = IWICBitmapDecoder_GetFrame(decoder, 0, &sourceFrame);
 407     if (FAILED(hr))
 408         goto end;
 409     hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA, (IWICBitmapSource*)sourceFrame, &sourceBitmap);
 410     if (FAILED(hr))
 411         goto end;
 412     hr = IWICBitmapFrameDecode_GetSize(sourceFrame, &result->width, &result->height);
 413     if (FAILED(hr))
 414         goto end;
 415     hr = IWICBitmapFrameDecode_GetResolution(sourceFrame, &result->dpiX, &result->dpiY);
 416     if (FAILED(hr))
 417         goto end;
 418     result->bits = HeapAlloc(GetProcessHeap(), 0, 4 * result->width * result->height);
 419     if (result->bits == NULL)
 420     {
 421         hr = E_OUTOFMEMORY;
 422         goto end;
 423     }
 424     rect.X = 0;
 425     rect.Y = 0;
 426     rect.Width = result->width;
 427     rect.Height = result->height;
 428     hr = IWICBitmapSource_CopyPixels(sourceBitmap, &rect, 4*result->width,
 429                                      4*result->width*result->height, result->bits);
 430
 431 end:
 432     if (decoder != NULL)
 433         IWICBitmapDecoder_Release(decoder);
 434     if (sourceFrame != NULL)
 435         IWICBitmapFrameDecode_Release(sourceFrame);
 436     if (sourceBitmap != NULL)
 437         IWICBitmapSource_Release(sourceBitmap);
 438     return hr;
 439 }
 440
 441 static HRESULT WINAPI IcoDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
 442     void **ppv)
 443 {
 444     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 445     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 446
 447     if (!ppv) return E_INVALIDARG;
 448
 449     if (IsEqualIID(&IID_IUnknown, iid) ||
 450         IsEqualIID(&IID_IWICBitmapDecoder, iid))
 451     {
 452         *ppv = &This->IWICBitmapDecoder_iface;
 453     }
 454     else
 455     {
 456         *ppv = NULL;
 457         return E_NOINTERFACE;
 458     }
 459
 460     IUnknown_AddRef((IUnknown*)*ppv);
 461     return S_OK;
 462 }
 463
 464 static ULONG WINAPI IcoDecoder_AddRef(IWICBitmapDecoder *iface)
 465 {
 466     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 467     ULONG ref = InterlockedIncrement(&This->ref);
 468
 469     TRACE("(%p) refcount=%u\n", iface, ref);
 470
 471     return ref;
 472 }
 473
 474 static ULONG WINAPI IcoDecoder_Release(IWICBitmapDecoder *iface)
 475 {
 476     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 477     ULONG ref = InterlockedDecrement(&This->ref);
 478
 479     TRACE("(%p) refcount=%u\n", iface, ref);
 480
 481     if (ref == 0)
 482     {
 483         This->lock.DebugInfo->Spare[0] = 0;
 484         DeleteCriticalSection(&This->lock);
 485         if (This->stream) IStream_Release(This->stream);
 486         HeapFree(GetProcessHeap(), 0, This);
 487     }
 488
 489     return ref;
 490 }
 491
 492 static HRESULT WINAPI IcoDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
 493     DWORD *capability)
 494 {
 495     HRESULT hr;
 496
 497     TRACE("(%p,%p,%p)\n", iface, stream, capability);
 498
 499     if (!stream || !capability) return E_INVALIDARG;
 500
 501     hr = IWICBitmapDecoder_Initialize(iface, stream, WICDecodeMetadataCacheOnDemand);
 502     if (hr != S_OK) return hr;
 503
 504     *capability = WICBitmapDecoderCapabilityCanDecodeAllImages;
 505     return S_OK;
 506 }
 507
 508 static HRESULT WINAPI IcoDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 509     WICDecodeOptions cacheOptions)
 510 {
 511     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 512     LARGE_INTEGER seek;
 513     HRESULT hr;
 514     ULONG bytesread;
 515     TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
 516
 517     EnterCriticalSection(&This->lock);
 518
 519     if (This->initialized)
 520     {
 521         hr = WINCODEC_ERR_WRONGSTATE;
 522         goto end;
 523     }
 524
 525     seek.QuadPart = 0;
 526     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 527     if (FAILED(hr)) goto end;
 528
 529     hr = IStream_Read(pIStream, &This->header, sizeof(ICONHEADER), &bytesread);
 530     if (FAILED(hr)) goto end;
 531     if (bytesread != sizeof(ICONHEADER) ||
 532         This->header.idReserved != 0 ||
 533         This->header.idType != 1)
 534     {
 535         hr = E_FAIL;
 536         goto end;
 537     }
 538
 539     This->initialized = TRUE;
 540     This->stream = pIStream;
 541     IStream_AddRef(pIStream);
 542
 543 end:
 544
 545     LeaveCriticalSection(&This->lock);
 546
 547     return hr;
 548 }
 549
 550 static HRESULT WINAPI IcoDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 551     GUID *pguidContainerFormat)
 552 {
 553     memcpy(pguidContainerFormat, &GUID_ContainerFormatIco, sizeof(GUID));
 554     return S_OK;
 555 }
 556
 557 static HRESULT WINAPI IcoDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 558     IWICBitmapDecoderInfo **ppIDecoderInfo)
 559 {
 560     HRESULT hr;
 561     IWICComponentInfo *compinfo;
 562
 563     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 564
 565     hr = CreateComponentInfo(&CLSID_WICIcoDecoder, &compinfo);
 566     if (FAILED(hr)) return hr;
 567
 568     hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
 569         (void**)ppIDecoderInfo);
 570
 571     IWICComponentInfo_Release(compinfo);
 572
 573     return hr;
 574 }
 575
 576 static HRESULT WINAPI IcoDecoder_CopyPalette(IWICBitmapDecoder *iface,
 577     IWICPalette *pIPalette)
 578 {
 579     TRACE("(%p,%p)\n", iface, pIPalette);
 580     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 581 }
 582
 583 static HRESULT WINAPI IcoDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 584     IWICMetadataQueryReader **ppIMetadataQueryReader)
 585 {
 586     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 587     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 588 }
 589
 590 static HRESULT WINAPI IcoDecoder_GetPreview(IWICBitmapDecoder *iface,
 591     IWICBitmapSource **ppIBitmapSource)
 592 {
 593     TRACE("(%p,%p)\n", iface, ppIBitmapSource);
 594     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 595 }
 596
 597 static HRESULT WINAPI IcoDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 598     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 599 {
 600     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 601     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 602 }
 603
 604 static HRESULT WINAPI IcoDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 605     IWICBitmapSource **ppIThumbnail)
 606 {
 607     TRACE("(%p,%p)\n", iface, ppIThumbnail);
 608     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 609 }
 610
 611 static HRESULT WINAPI IcoDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 612     UINT *pCount)
 613 {
 614     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 615
 616     if (!pCount) return E_INVALIDARG;
 617
 618     EnterCriticalSection(&This->lock);
 619     *pCount = This->initialized ? This->header.idCount : 0;
 620     LeaveCriticalSection(&This->lock);
 621
 622     TRACE("(%p) <-- %d\n", iface, *pCount);
 623
 624     return S_OK;
 625 }
 626
 627 static HRESULT WINAPI IcoDecoder_GetFrame(IWICBitmapDecoder *iface,
 628     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 629 {
 630     IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
 631     IcoFrameDecode *result=NULL;
 632     LARGE_INTEGER seek;
 633     ULARGE_INTEGER offset, length;
 634     HRESULT hr;
 635     ULONG bytesread;
 636     ICONDIRENTRY entry;
 637     IWICStream *substream=NULL;
 638     DWORD magic;
 639     TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
 640
 641     EnterCriticalSection(&This->lock);
 642
 643     if (!This->initialized)
 644     {
 645         hr = WINCODEC_ERR_FRAMEMISSING;
 646         goto fail;
 647     }
 648
 649     if (This->header.idCount < index)
 650     {
 651         hr = E_INVALIDARG;
 652         goto fail;
 653     }
 654
 655     result = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoFrameDecode));
 656     if (!result)
 657     {
 658         hr = E_OUTOFMEMORY;
 659         goto fail;
 660     }
 661
 662     result->IWICBitmapFrameDecode_iface.lpVtbl = &IcoFrameDecode_Vtbl;
 663     result->ref = 1;
 664     result->bits = NULL;
 665
 666     /* read the icon entry */
 667     seek.QuadPart = sizeof(ICONHEADER) + sizeof(ICONDIRENTRY) * index;
 668     hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, 0);
 669     if (FAILED(hr)) goto fail;
 670
 671     hr = IStream_Read(This->stream, &entry, sizeof(ICONDIRENTRY), &bytesread);
 672     if (FAILED(hr) || bytesread != sizeof(ICONDIRENTRY)) goto fail;
 673
 674     /* create a stream object for this icon */
 675     hr = StreamImpl_Create(&substream);
 676     if (FAILED(hr)) goto fail;
 677
 678     offset.QuadPart = entry.dwDIBOffset;
 679     length.QuadPart = entry.dwDIBSize;
 680     hr = IWICStream_InitializeFromIStreamRegion(substream, This->stream, offset, length);
 681     if (FAILED(hr)) goto fail;
 682
 683     /* read the bitmapinfo size or magic number */
 684     hr = IWICStream_Read(substream, &magic, sizeof(magic), &bytesread);
 685     if (FAILED(hr) || bytesread != sizeof(magic)) goto fail;
 686
 687     /* forward to the appropriate decoding function based on the magic number */
 688     switch (magic)
 689     {
 690     case sizeof(BITMAPCOREHEADER):
 691     case 64: /* sizeof(BITMAPCOREHEADER2) */
 692     case sizeof(BITMAPINFOHEADER):
 693     case sizeof(BITMAPV4HEADER):
 694     case sizeof(BITMAPV5HEADER):
 695         hr = ReadIcoDib((IStream*)substream, result);
 696         break;
 697     case 0x474e5089:
 698         hr = ReadIcoPng((IStream*)substream, result);
 699         break;
 700     default:
 701         FIXME("Unrecognized ICO frame magic: %x\n", magic);
 702         hr = E_FAIL;
 703         break;
 704     }
 705     if (FAILED(hr)) goto fail;
 706
 707     *ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
 708
 709     LeaveCriticalSection(&This->lock);
 710
 711     IWICStream_Release(substream);
 712
 713     return S_OK;
 714
 715 fail:
 716     LeaveCriticalSection(&This->lock);
 717     HeapFree(GetProcessHeap(), 0, result);
 718     if (substream) IWICStream_Release(substream);
 719     if (SUCCEEDED(hr)) hr = E_FAIL;
 720     TRACE("<-- %x\n", hr);
 721     return hr;
 722 }
 723
 724 static const IWICBitmapDecoderVtbl IcoDecoder_Vtbl = {
 725     IcoDecoder_QueryInterface,
 726     IcoDecoder_AddRef,
 727     IcoDecoder_Release,
 728     IcoDecoder_QueryCapability,
 729     IcoDecoder_Initialize,
 730     IcoDecoder_GetContainerFormat,
 731     IcoDecoder_GetDecoderInfo,
 732     IcoDecoder_CopyPalette,
 733     IcoDecoder_GetMetadataQueryReader,
 734     IcoDecoder_GetPreview,
 735     IcoDecoder_GetColorContexts,
 736     IcoDecoder_GetThumbnail,
 737     IcoDecoder_GetFrameCount,
 738     IcoDecoder_GetFrame
 739 };
 740
 741 HRESULT IcoDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 742 {
 743     IcoDecoder *This;
 744     HRESULT ret;
 745
 746     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 747
 748     *ppv = NULL;
 749
 750     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 751
 752     This = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoDecoder));
 753     if (!This) return E_OUTOFMEMORY;
 754
 755     This->IWICBitmapDecoder_iface.lpVtbl = &IcoDecoder_Vtbl;
 756     This->ref = 1;
 757     This->stream = NULL;
 758     This->initialized = FALSE;
 759     InitializeCriticalSection(&This->lock);
 760     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": IcoDecoder.lock");
 761
 762     ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
 763     IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
 764
 765     return ret;
 766 }