git.oblomov.eu Git - wine/blob - dlls/windowscodecs/bmpdecode.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 "winreg.h"
  28 #include "wingdi.h"
  29 #include "objbase.h"
  30 #include "wincodec.h"
  31
  32 #include "wincodecs_private.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  37
  38 typedef struct {
  39     DWORD bc2Size;
  40     DWORD bc2Width;
  41     DWORD bc2Height;
  42     WORD  bc2Planes;
  43     WORD  bc2BitCount;
  44     DWORD bc2Compression;
  45     DWORD bc2SizeImage;
  46     DWORD bc2XRes;
  47     DWORD bc2YRes;
  48     DWORD bc2ClrUsed;
  49     DWORD bc2ClrImportant;
  50     /* same as BITMAPINFOHEADER until this point */
  51     WORD  bc2ResUnit;
  52     WORD  bc2Reserved;
  53     WORD  bc2Orientation;
  54     WORD  bc2Halftoning;
  55     DWORD bc2HalftoneSize1;
  56     DWORD bc2HalftoneSize2;
  57     DWORD bc2ColorSpace;
  58     DWORD bc2AppData;
  59 } BITMAPCOREHEADER2;
  60
  61 struct BmpFrameDecode;
  62 typedef HRESULT (*ReadDataFunc)(struct BmpFrameDecode* This);
  63
  64 typedef struct BmpFrameDecode {
  65     const IWICBitmapFrameDecodeVtbl *lpVtbl;
  66     LONG ref;
  67     IStream *stream;
  68     BITMAPFILEHEADER bfh;
  69     BITMAPV5HEADER bih;
  70     const WICPixelFormatGUID *pixelformat;
  71     int bitsperpixel;
  72     ReadDataFunc read_data_func;
  73     INT stride;
  74     BYTE *imagedata;
  75     BYTE *imagedatastart;
  76 } BmpFrameDecode;
  77
  78 static HRESULT WINAPI BmpFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
  79     void **ppv)
  80 {
  81     BmpFrameDecode *This = (BmpFrameDecode*)iface;
  82     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  83
  84     if (!ppv) return E_INVALIDARG;
  85
  86     if (IsEqualIID(&IID_IUnknown, iid) ||
  87         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  88         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
  89     {
  90         *ppv = This;
  91     }
  92     else
  93     {
  94         *ppv = NULL;
  95         return E_NOINTERFACE;
  96     }
  97
  98     IUnknown_AddRef((IUnknown*)*ppv);
  99     return S_OK;
 100 }
 101
 102 static ULONG WINAPI BmpFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
 103 {
 104     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 105     ULONG ref = InterlockedIncrement(&This->ref);
 106
 107     TRACE("(%p) refcount=%u\n", iface, ref);
 108
 109     return ref;
 110 }
 111
 112 static ULONG WINAPI BmpFrameDecode_Release(IWICBitmapFrameDecode *iface)
 113 {
 114     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 115     ULONG ref = InterlockedDecrement(&This->ref);
 116
 117     TRACE("(%p) refcount=%u\n", iface, ref);
 118
 119     if (ref == 0)
 120     {
 121         IStream_Release(This->stream);
 122         HeapFree(GetProcessHeap(), 0, This->imagedata);
 123         HeapFree(GetProcessHeap(), 0, This);
 124     }
 125
 126     return ref;
 127 }
 128
 129 static HRESULT WINAPI BmpFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
 130     UINT *puiWidth, UINT *puiHeight)
 131 {
 132     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 133     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 134
 135     if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
 136     {
 137         BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
 138         *puiWidth = bch->bcWidth;
 139         *puiHeight = bch->bcHeight;
 140     }
 141     else
 142     {
 143         *puiWidth = This->bih.bV5Width;
 144         *puiHeight = abs(This->bih.bV5Height);
 145     }
 146     return S_OK;
 147 }
 148
 149 static HRESULT WINAPI BmpFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
 150     WICPixelFormatGUID *pPixelFormat)
 151 {
 152     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 153     TRACE("(%p,%p)\n", iface, pPixelFormat);
 154
 155     memcpy(pPixelFormat, This->pixelformat, sizeof(GUID));
 156
 157     return S_OK;
 158 }
 159
 160 static HRESULT BmpHeader_GetResolution(BITMAPV5HEADER *bih, double *pDpiX, double *pDpiY)
 161 {
 162     switch (bih->bV5Size)
 163     {
 164     case sizeof(BITMAPCOREHEADER):
 165         *pDpiX = 96.0;
 166         *pDpiY = 96.0;
 167         return S_OK;
 168     case sizeof(BITMAPCOREHEADER2):
 169     case sizeof(BITMAPINFOHEADER):
 170     case sizeof(BITMAPV4HEADER):
 171     case sizeof(BITMAPV5HEADER):
 172         *pDpiX = bih->bV5XPelsPerMeter * 0.0254;
 173         *pDpiY = bih->bV5YPelsPerMeter * 0.0254;
 174         return S_OK;
 175     default:
 176         return E_FAIL;
 177     }
 178 }
 179
 180 static HRESULT WINAPI BmpFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
 181     double *pDpiX, double *pDpiY)
 182 {
 183     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 184     TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
 185
 186     return BmpHeader_GetResolution(&This->bih, pDpiX, pDpiY);
 187 }
 188
 189 static HRESULT WINAPI BmpFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
 190     IWICPalette *pIPalette)
 191 {
 192     HRESULT hr;
 193     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 194     int count;
 195     WICColor *wiccolors=NULL;
 196     RGBTRIPLE *bgrcolors=NULL;
 197
 198     TRACE("(%p,%p)\n", iface, pIPalette);
 199
 200     if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
 201     {
 202         BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
 203         if (bch->bcBitCount <= 8)
 204         {
 205             /* 2**n colors in BGR format after the header */
 206             ULONG tablesize, bytesread;
 207             LARGE_INTEGER offset;
 208             int i;
 209
 210             count = 1 << bch->bcBitCount;
 211             wiccolors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * count);
 212             tablesize = sizeof(RGBTRIPLE) * count;
 213             bgrcolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
 214             if (!wiccolors || !bgrcolors)
 215             {
 216                 hr = E_OUTOFMEMORY;
 217                 goto end;
 218             }
 219
 220             offset.QuadPart = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPCOREHEADER);
 221             hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
 222             if (FAILED(hr)) goto end;
 223
 224             hr = IStream_Read(This->stream, bgrcolors, tablesize, &bytesread);
 225             if (FAILED(hr)) goto end;
 226             if (bytesread != tablesize) {
 227                 hr = E_FAIL;
 228                 goto end;
 229             }
 230
 231             for (i=0; i<count; i++)
 232             {
 233                 wiccolors[i] = 0xff000000|
 234                                (bgrcolors[i].rgbtRed<<16)|
 235                                (bgrcolors[i].rgbtGreen<<8)|
 236                                bgrcolors[i].rgbtBlue;
 237             }
 238         }
 239         else
 240         {
 241             return WINCODEC_ERR_PALETTEUNAVAILABLE;
 242         }
 243     }
 244     else
 245     {
 246         if (This->bih.bV5BitCount <= 8)
 247         {
 248             ULONG tablesize, bytesread;
 249             LARGE_INTEGER offset;
 250             int i;
 251
 252             if (This->bih.bV5ClrUsed == 0)
 253                 count = 1 << This->bih.bV5BitCount;
 254             else
 255                 count = This->bih.bV5ClrUsed;
 256
 257             tablesize = sizeof(WICColor) * count;
 258             wiccolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
 259             if (!wiccolors) return E_OUTOFMEMORY;
 260
 261             offset.QuadPart = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
 262             hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
 263             if (FAILED(hr)) goto end;
 264
 265             hr = IStream_Read(This->stream, wiccolors, tablesize, &bytesread);
 266             if (FAILED(hr)) goto end;
 267             if (bytesread != tablesize) {
 268                 hr = E_FAIL;
 269                 goto end;
 270             }
 271
 272             /* convert from BGR to BGRA by setting alpha to 100% */
 273             for (i=0; i<count; i++)
 274                 wiccolors[i] |= 0xff000000;
 275         }
 276         else
 277         {
 278             return WINCODEC_ERR_PALETTEUNAVAILABLE;
 279         }
 280     }
 281
 282     hr = IWICPalette_InitializeCustom(pIPalette, wiccolors, count);
 283
 284 end:
 285     HeapFree(GetProcessHeap(), 0, wiccolors);
 286     HeapFree(GetProcessHeap(), 0, bgrcolors);
 287     return hr;
 288 }
 289
 290 static HRESULT WINAPI BmpFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
 291     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 292 {
 293     BmpFrameDecode *This = (BmpFrameDecode*)iface;
 294     HRESULT hr;
 295     UINT width, height;
 296     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 297
 298     if (!This->imagedata)
 299     {
 300         hr = This->read_data_func(This);
 301         if (FAILED(hr)) return hr;
 302     }
 303
 304     hr = BmpFrameDecode_GetSize(iface, &width, &height);
 305     if (FAILED(hr)) return hr;
 306
 307     return copy_pixels(This->bitsperpixel, This->imagedatastart,
 308         width, height, This->stride,
 309         prc, cbStride, cbBufferSize, pbBuffer);
 310 }
 311
 312 static HRESULT WINAPI BmpFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 313     IWICMetadataQueryReader **ppIMetadataQueryReader)
 314 {
 315     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 316     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 317 }
 318
 319 static HRESULT WINAPI BmpFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
 320     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 321 {
 322     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 323     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 324 }
 325
 326 static HRESULT WINAPI BmpFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
 327     IWICBitmapSource **ppIThumbnail)
 328 {
 329     TRACE("(%p,%p)\n", iface, ppIThumbnail);
 330     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 331 }
 332
 333 static HRESULT BmpFrameDecode_ReadUncompressed(BmpFrameDecode* This)
 334 {
 335     UINT bytesperrow;
 336     UINT width, height;
 337     UINT datasize;
 338     int bottomup;
 339     HRESULT hr;
 340     LARGE_INTEGER offbits;
 341     ULONG bytesread;
 342
 343     if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
 344     {
 345         BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
 346         width = bch->bcWidth;
 347         height = bch->bcHeight;
 348         bottomup = 1;
 349     }
 350     else
 351     {
 352         width = This->bih.bV5Width;
 353         height = abs(This->bih.bV5Height);
 354         bottomup = (This->bih.bV5Height > 0);
 355     }
 356
 357     /* row sizes in BMP files must be divisible by 4 bytes */
 358     bytesperrow = (((width * This->bitsperpixel)+31)/32)*4;
 359     datasize = bytesperrow * height;
 360
 361     This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
 362     if (!This->imagedata) return E_OUTOFMEMORY;
 363
 364     offbits.QuadPart = This->bfh.bfOffBits;
 365     hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
 366     if (FAILED(hr)) goto fail;
 367
 368     hr = IStream_Read(This->stream, This->imagedata, datasize, &bytesread);
 369     if (FAILED(hr) || bytesread != datasize) goto fail;
 370
 371     if (bottomup)
 372     {
 373         This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
 374         This->stride = -bytesperrow;
 375     }
 376     else
 377     {
 378         This->imagedatastart = This->imagedata;
 379         This->stride = bytesperrow;
 380     }
 381     return S_OK;
 382
 383 fail:
 384     HeapFree(GetProcessHeap(), 0, This->imagedata);
 385     This->imagedata = NULL;
 386     if (SUCCEEDED(hr)) hr = E_FAIL;
 387     return hr;
 388 }
 389
 390 static HRESULT BmpFrameDecode_ReadRLE8(BmpFrameDecode* This)
 391 {
 392     UINT bytesperrow;
 393     UINT width, height;
 394     BYTE *rledata, *cursor, *rledataend;
 395     UINT rlesize, datasize, palettesize;
 396     DWORD palette[256];
 397     UINT x, y;
 398     DWORD *bgrdata;
 399     HRESULT hr;
 400     LARGE_INTEGER offbits;
 401     ULONG bytesread;
 402
 403     width = This->bih.bV5Width;
 404     height = abs(This->bih.bV5Height);
 405     bytesperrow = width * 4;
 406     datasize = bytesperrow * height;
 407     rlesize = This->bih.bV5SizeImage;
 408     if (This->bih.bV5ClrUsed && This->bih.bV5ClrUsed < 256)
 409         palettesize = 4 * This->bih.bV5ClrUsed;
 410     else
 411         palettesize = 4 * 256;
 412
 413     rledata = HeapAlloc(GetProcessHeap(), 0, rlesize);
 414     This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
 415     if (!This->imagedata || !rledata)
 416     {
 417         hr = E_OUTOFMEMORY;
 418         goto fail;
 419     }
 420
 421     /* read palette */
 422     offbits.QuadPart = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
 423     hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
 424     if (FAILED(hr)) goto fail;
 425
 426     hr = IStream_Read(This->stream, palette, palettesize, &bytesread);
 427     if (FAILED(hr) || bytesread != palettesize) goto fail;
 428
 429     /* read RLE data */
 430     offbits.QuadPart = This->bfh.bfOffBits;
 431     hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
 432     if (FAILED(hr)) goto fail;
 433
 434     hr = IStream_Read(This->stream, rledata, rlesize, &bytesread);
 435     if (FAILED(hr) || bytesread != rlesize) goto fail;
 436
 437     /* decode RLE */
 438     bgrdata = (DWORD*)This->imagedata;
 439     x = 0;
 440     y = 0;
 441     rledataend = rledata + rlesize;
 442     cursor = rledata;
 443     while (cursor < rledataend && y < height)
 444     {
 445         BYTE length = *cursor++;
 446         if (length == 0)
 447         {
 448             /* escape code */
 449             BYTE escape = *cursor++;
 450             switch(escape)
 451             {
 452             case 0: /* end of line */
 453                 x = 0;
 454                 y++;
 455                 break;
 456             case 1: /* end of bitmap */
 457                 goto end;
 458             case 2: /* delta */
 459                 if (cursor < rledataend)
 460                 {
 461                     x += *cursor++;
 462                     y += *cursor++;
 463                 }
 464                 break;
 465             default: /* absolute mode */
 466                 length = escape;
 467                 while (cursor < rledataend && length-- && x < width)
 468                     bgrdata[y*width + x++] = palette[*cursor++];
 469                 if (escape & 1) cursor++; /* skip pad byte */
 470             }
 471         }
 472         else
 473         {
 474             DWORD color = palette[*cursor++];
 475             while (length-- && x < width)
 476                 bgrdata[y*width + x++] = color;
 477         }
 478     }
 479
 480 end:
 481     HeapFree(GetProcessHeap(), 0, rledata);
 482
 483     This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
 484     This->stride = -bytesperrow;
 485
 486     return S_OK;
 487
 488 fail:
 489     HeapFree(GetProcessHeap(), 0, rledata);
 490     HeapFree(GetProcessHeap(), 0, This->imagedata);
 491     This->imagedata = NULL;
 492     if (SUCCEEDED(hr)) hr = E_FAIL;
 493     return hr;
 494 }
 495
 496 static HRESULT BmpFrameDecode_ReadRLE4(BmpFrameDecode* This)
 497 {
 498     UINT bytesperrow;
 499     UINT width, height;
 500     BYTE *rledata, *cursor, *rledataend;
 501     UINT rlesize, datasize, palettesize;
 502     DWORD palette[16];
 503     UINT x, y;
 504     DWORD *bgrdata;
 505     HRESULT hr;
 506     LARGE_INTEGER offbits;
 507     ULONG bytesread;
 508
 509     width = This->bih.bV5Width;
 510     height = abs(This->bih.bV5Height);
 511     bytesperrow = width * 4;
 512     datasize = bytesperrow * height;
 513     rlesize = This->bih.bV5SizeImage;
 514     if (This->bih.bV5ClrUsed && This->bih.bV5ClrUsed < 16)
 515         palettesize = 4 * This->bih.bV5ClrUsed;
 516     else
 517         palettesize = 4 * 16;
 518
 519     rledata = HeapAlloc(GetProcessHeap(), 0, rlesize);
 520     This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
 521     if (!This->imagedata || !rledata)
 522     {
 523         hr = E_OUTOFMEMORY;
 524         goto fail;
 525     }
 526
 527     /* read palette */
 528     offbits.QuadPart = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
 529     hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
 530     if (FAILED(hr)) goto fail;
 531
 532     hr = IStream_Read(This->stream, palette, palettesize, &bytesread);
 533     if (FAILED(hr) || bytesread != palettesize) goto fail;
 534
 535     /* read RLE data */
 536     offbits.QuadPart = This->bfh.bfOffBits;
 537     hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
 538     if (FAILED(hr)) goto fail;
 539
 540     hr = IStream_Read(This->stream, rledata, rlesize, &bytesread);
 541     if (FAILED(hr) || bytesread != rlesize) goto fail;
 542
 543     /* decode RLE */
 544     bgrdata = (DWORD*)This->imagedata;
 545     x = 0;
 546     y = 0;
 547     rledataend = rledata + rlesize;
 548     cursor = rledata;
 549     while (cursor < rledataend && y < height)
 550     {
 551         BYTE length = *cursor++;
 552         if (length == 0)
 553         {
 554             /* escape code */
 555             BYTE escape = *cursor++;
 556             switch(escape)
 557             {
 558             case 0: /* end of line */
 559                 x = 0;
 560                 y++;
 561                 break;
 562             case 1: /* end of bitmap */
 563                 goto end;
 564             case 2: /* delta */
 565                 if (cursor < rledataend)
 566                 {
 567                     x += *cursor++;
 568                     y += *cursor++;
 569                 }
 570                 break;
 571             default: /* absolute mode */
 572                 length = escape;
 573                 while (cursor < rledataend && length-- && x < width)
 574                 {
 575                     BYTE colors = *cursor++;
 576                     bgrdata[y*width + x++] = palette[colors>>4];
 577                     if (length-- && x < width)
 578                         bgrdata[y*width + x++] = palette[colors&0xf];
 579                     else
 580                         break;
 581                 }
 582                 if ((cursor - rledata) & 1) cursor++; /* skip pad byte */
 583             }
 584         }
 585         else
 586         {
 587             BYTE colors = *cursor++;
 588             DWORD color1 = palette[colors>>4];
 589             DWORD color2 = palette[colors&0xf];
 590             while (length-- && x < width)
 591             {
 592                 bgrdata[y*width + x++] = color1;
 593                 if (length-- && x < width)
 594                     bgrdata[y*width + x++] = color2;
 595                 else
 596                     break;
 597             }
 598         }
 599     }
 600
 601 end:
 602     HeapFree(GetProcessHeap(), 0, rledata);
 603
 604     This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
 605     This->stride = -bytesperrow;
 606
 607     return S_OK;
 608
 609 fail:
 610     HeapFree(GetProcessHeap(), 0, rledata);
 611     HeapFree(GetProcessHeap(), 0, This->imagedata);
 612     This->imagedata = NULL;
 613     if (SUCCEEDED(hr)) hr = E_FAIL;
 614     return hr;
 615 }
 616
 617 static HRESULT BmpFrameDecode_ReadUnsupported(BmpFrameDecode* This)
 618 {
 619     return E_FAIL;
 620 }
 621
 622 struct bitfields_format {
 623     WORD bitcount; /* 0 for end of list */
 624     DWORD redmask;
 625     DWORD greenmask;
 626     DWORD bluemask;
 627     DWORD alphamask;
 628     const WICPixelFormatGUID *pixelformat;
 629     ReadDataFunc read_data_func;
 630 };
 631
 632 static const struct bitfields_format bitfields_formats[] = {
 633     {16,0x7c00,0x3e0,0x1f,0,&GUID_WICPixelFormat16bppBGR555,BmpFrameDecode_ReadUncompressed},
 634     {16,0xf800,0x7e0,0x1f,0,&GUID_WICPixelFormat16bppBGR565,BmpFrameDecode_ReadUncompressed},
 635     {32,0xff0000,0xff00,0xff,0,&GUID_WICPixelFormat32bppBGR,BmpFrameDecode_ReadUncompressed},
 636     {32,0xff0000,0xff00,0xff,0xff000000,&GUID_WICPixelFormat32bppBGRA,BmpFrameDecode_ReadUncompressed},
 637     {0}
 638 };
 639
 640 static const IWICBitmapFrameDecodeVtbl BmpFrameDecode_Vtbl = {
 641     BmpFrameDecode_QueryInterface,
 642     BmpFrameDecode_AddRef,
 643     BmpFrameDecode_Release,
 644     BmpFrameDecode_GetSize,
 645     BmpFrameDecode_GetPixelFormat,
 646     BmpFrameDecode_GetResolution,
 647     BmpFrameDecode_CopyPalette,
 648     BmpFrameDecode_CopyPixels,
 649     BmpFrameDecode_GetMetadataQueryReader,
 650     BmpFrameDecode_GetColorContexts,
 651     BmpFrameDecode_GetThumbnail
 652 };
 653
 654 typedef struct {
 655     const IWICBitmapDecoderVtbl *lpVtbl;
 656     LONG ref;
 657     BOOL initialized;
 658     IStream *stream;
 659     BITMAPFILEHEADER bfh;
 660     BITMAPV5HEADER bih;
 661     BmpFrameDecode *framedecode;
 662     const WICPixelFormatGUID *pixelformat;
 663     int bitsperpixel;
 664     ReadDataFunc read_data_func;
 665 } BmpDecoder;
 666
 667 static HRESULT BmpDecoder_ReadHeaders(BmpDecoder* This, IStream *stream)
 668 {
 669     HRESULT hr;
 670     ULONG bytestoread, bytesread;
 671     LARGE_INTEGER seek;
 672
 673     if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
 674
 675     seek.QuadPart = 0;
 676     hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
 677     if (FAILED(hr)) return hr;
 678
 679     hr = IStream_Read(stream, &This->bfh, sizeof(BITMAPFILEHEADER), &bytesread);
 680     if (FAILED(hr)) return hr;
 681     if (bytesread != sizeof(BITMAPFILEHEADER) ||
 682         This->bfh.bfType != 0x4d42 /* "BM" */) return E_FAIL;
 683
 684     hr = IStream_Read(stream, &This->bih.bV5Size, sizeof(DWORD), &bytesread);
 685     if (FAILED(hr)) return hr;
 686     if (bytesread != sizeof(DWORD) ||
 687         (This->bih.bV5Size != sizeof(BITMAPCOREHEADER) &&
 688          This->bih.bV5Size != sizeof(BITMAPCOREHEADER2) &&
 689          This->bih.bV5Size != sizeof(BITMAPINFOHEADER) &&
 690          This->bih.bV5Size != sizeof(BITMAPV4HEADER) &&
 691          This->bih.bV5Size != sizeof(BITMAPV5HEADER))) return E_FAIL;
 692
 693     bytestoread = This->bih.bV5Size-sizeof(DWORD);
 694     hr = IStream_Read(stream, &This->bih.bV5Width, bytestoread, &bytesread);
 695     if (FAILED(hr)) return hr;
 696     if (bytestoread != bytesread) return E_FAIL;
 697
 698     /* if this is a BITMAPINFOHEADER with BI_BITFIELDS compression, we need to
 699         read the extra fields */
 700     if (This->bih.bV5Size == sizeof(BITMAPINFOHEADER) &&
 701         This->bih.bV5Compression == BI_BITFIELDS)
 702     {
 703         hr = IStream_Read(stream, &This->bih.bV5RedMask, 12, &bytesread);
 704         if (FAILED(hr)) return hr;
 705         if (bytesread != 12) return E_FAIL;
 706         This->bih.bV5AlphaMask = 0;
 707     }
 708
 709     /* decide what kind of bitmap this is and how/if we can read it */
 710     if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
 711     {
 712         BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
 713         TRACE("BITMAPCOREHEADER with depth=%i\n", bch->bcBitCount);
 714         This->bitsperpixel = bch->bcBitCount;
 715         This->read_data_func = BmpFrameDecode_ReadUncompressed;
 716         switch(bch->bcBitCount)
 717         {
 718         case 1:
 719             This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
 720             break;
 721         case 2:
 722             This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
 723             break;
 724         case 4:
 725             This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
 726             break;
 727         case 8:
 728             This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
 729             break;
 730         case 24:
 731             This->pixelformat = &GUID_WICPixelFormat24bppBGR;
 732             break;
 733         default:
 734             This->pixelformat = &GUID_WICPixelFormatUndefined;
 735             WARN("unsupported bit depth %i for BITMAPCOREHEADER\n", bch->bcBitCount);
 736             break;
 737         }
 738     }
 739     else /* struct is compatible with BITMAPINFOHEADER */
 740     {
 741         TRACE("bitmap header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
 742         switch(This->bih.bV5Compression)
 743         {
 744         case BI_RGB:
 745             This->bitsperpixel = This->bih.bV5BitCount;
 746             This->read_data_func = BmpFrameDecode_ReadUncompressed;
 747             switch(This->bih.bV5BitCount)
 748             {
 749             case 1:
 750                 This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
 751                 break;
 752             case 2:
 753                 This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
 754                 break;
 755             case 4:
 756                 This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
 757                 break;
 758             case 8:
 759                 This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
 760                 break;
 761             case 16:
 762                 This->pixelformat = &GUID_WICPixelFormat16bppBGR555;
 763                 break;
 764             case 24:
 765                 This->pixelformat = &GUID_WICPixelFormat24bppBGR;
 766                 break;
 767             case 32:
 768                 This->pixelformat = &GUID_WICPixelFormat32bppBGR;
 769                 break;
 770             default:
 771                 This->pixelformat = &GUID_WICPixelFormatUndefined;
 772                 FIXME("unsupported bit depth %i for uncompressed RGB\n", This->bih.bV5BitCount);
 773             }
 774             break;
 775         case BI_RLE8:
 776             This->bitsperpixel = 32;
 777             This->read_data_func = BmpFrameDecode_ReadRLE8;
 778             This->pixelformat = &GUID_WICPixelFormat32bppBGR;
 779             break;
 780         case BI_RLE4:
 781             This->bitsperpixel = 32;
 782             This->read_data_func = BmpFrameDecode_ReadRLE4;
 783             This->pixelformat = &GUID_WICPixelFormat32bppBGR;
 784             break;
 785         case BI_BITFIELDS:
 786         {
 787             const struct bitfields_format *format;
 788             if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER2))
 789             {
 790                 /* BCH2 doesn't support bitfields; this is Huffman 1D compression */
 791                 This->bitsperpixel = 0;
 792                 This->read_data_func = BmpFrameDecode_ReadUnsupported;
 793                 This->pixelformat = &GUID_WICPixelFormatUndefined;
 794                 FIXME("Huffman 1D compression is unsupported\n");
 795                 break;
 796             }
 797             This->bitsperpixel = This->bih.bV5BitCount;
 798             for (format = bitfields_formats; format->bitcount; format++)
 799             {
 800                 if ((format->bitcount == This->bih.bV5BitCount) &&
 801                     (format->redmask == This->bih.bV5RedMask) &&
 802                     (format->greenmask == This->bih.bV5GreenMask) &&
 803                     (format->bluemask == This->bih.bV5BlueMask) &&
 804                     (format->alphamask == This->bih.bV5AlphaMask))
 805                 {
 806                     This->read_data_func = format->read_data_func;
 807                     This->pixelformat = format->pixelformat;
 808                     break;
 809                 }
 810             }
 811             if (!format->bitcount)
 812             {
 813                 This->read_data_func = BmpFrameDecode_ReadUncompressed;
 814                 This->pixelformat = &GUID_WICPixelFormatUndefined;
 815                 FIXME("unsupported bitfields type depth=%i red=%x green=%x blue=%x alpha=%x\n",
 816                     This->bih.bV5BitCount, This->bih.bV5RedMask, This->bih.bV5GreenMask, This->bih.bV5BlueMask, This->bih.bV5AlphaMask);
 817             }
 818             break;
 819         }
 820         default:
 821             This->bitsperpixel = 0;
 822             This->read_data_func = BmpFrameDecode_ReadUnsupported;
 823             This->pixelformat = &GUID_WICPixelFormatUndefined;
 824             FIXME("unsupported bitmap type header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
 825             break;
 826         }
 827     }
 828
 829     This->initialized = TRUE;
 830
 831     return S_OK;
 832 }
 833
 834 static HRESULT WINAPI BmpDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
 835     void **ppv)
 836 {
 837     BmpDecoder *This = (BmpDecoder*)iface;
 838     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 839
 840     if (!ppv) return E_INVALIDARG;
 841
 842     if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
 843     {
 844         *ppv = This;
 845     }
 846     else
 847     {
 848         *ppv = NULL;
 849         return E_NOINTERFACE;
 850     }
 851
 852     IUnknown_AddRef((IUnknown*)*ppv);
 853     return S_OK;
 854 }
 855
 856 static ULONG WINAPI BmpDecoder_AddRef(IWICBitmapDecoder *iface)
 857 {
 858     BmpDecoder *This = (BmpDecoder*)iface;
 859     ULONG ref = InterlockedIncrement(&This->ref);
 860
 861     TRACE("(%p) refcount=%u\n", iface, ref);
 862
 863     return ref;
 864 }
 865
 866 static ULONG WINAPI BmpDecoder_Release(IWICBitmapDecoder *iface)
 867 {
 868     BmpDecoder *This = (BmpDecoder*)iface;
 869     ULONG ref = InterlockedDecrement(&This->ref);
 870
 871     TRACE("(%p) refcount=%u\n", iface, ref);
 872
 873     if (ref == 0)
 874     {
 875         if (This->stream) IStream_Release(This->stream);
 876         if (This->framedecode) IUnknown_Release((IUnknown*)This->framedecode);
 877         HeapFree(GetProcessHeap(), 0, This);
 878     }
 879
 880     return ref;
 881 }
 882
 883 static HRESULT WINAPI BmpDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
 884     DWORD *pdwCapability)
 885 {
 886     HRESULT hr;
 887     BmpDecoder *This = (BmpDecoder*)iface;
 888
 889     hr = BmpDecoder_ReadHeaders(This, pIStream);
 890     if (FAILED(hr)) return hr;
 891
 892     if (This->read_data_func == BmpFrameDecode_ReadUnsupported)
 893         *pdwCapability = 0;
 894     else
 895         *pdwCapability = WICBitmapDecoderCapabilityCanDecodeAllImages;
 896
 897     return S_OK;
 898 }
 899
 900 static HRESULT WINAPI BmpDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 901     WICDecodeOptions cacheOptions)
 902 {
 903     HRESULT hr;
 904     BmpDecoder *This = (BmpDecoder*)iface;
 905
 906     hr = BmpDecoder_ReadHeaders(This, pIStream);
 907
 908     if (SUCCEEDED(hr))
 909     {
 910         This->stream = pIStream;
 911         IStream_AddRef(pIStream);
 912     }
 913
 914     return hr;
 915 }
 916
 917 static HRESULT WINAPI BmpDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 918     GUID *pguidContainerFormat)
 919 {
 920     memcpy(pguidContainerFormat, &GUID_ContainerFormatBmp, sizeof(GUID));
 921     return S_OK;
 922 }
 923
 924 static HRESULT WINAPI BmpDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 925     IWICBitmapDecoderInfo **ppIDecoderInfo)
 926 {
 927     HRESULT hr;
 928     IWICComponentInfo *compinfo;
 929
 930     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 931
 932     hr = CreateComponentInfo(&CLSID_WICBmpDecoder, &compinfo);
 933     if (FAILED(hr)) return hr;
 934
 935     hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
 936         (void**)ppIDecoderInfo);
 937
 938     IWICComponentInfo_Release(compinfo);
 939
 940     return hr;
 941 }
 942
 943 static HRESULT WINAPI BmpDecoder_CopyPalette(IWICBitmapDecoder *iface,
 944     IWICPalette *pIPalette)
 945 {
 946     TRACE("(%p,%p)\n", iface, pIPalette);
 947
 948     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 949 }
 950
 951 static HRESULT WINAPI BmpDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 952     IWICMetadataQueryReader **ppIMetadataQueryReader)
 953 {
 954     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 955     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 956 }
 957
 958 static HRESULT WINAPI BmpDecoder_GetPreview(IWICBitmapDecoder *iface,
 959     IWICBitmapSource **ppIBitmapSource)
 960 {
 961     TRACE("(%p,%p)\n", iface, ppIBitmapSource);
 962     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 963 }
 964
 965 static HRESULT WINAPI BmpDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 966     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 967 {
 968     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 969     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 970 }
 971
 972 static HRESULT WINAPI BmpDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 973     IWICBitmapSource **ppIThumbnail)
 974 {
 975     TRACE("(%p,%p)\n", iface, ppIThumbnail);
 976     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 977 }
 978
 979 static HRESULT WINAPI BmpDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 980     UINT *pCount)
 981 {
 982     *pCount = 1;
 983     return S_OK;
 984 }
 985
 986 static HRESULT WINAPI BmpDecoder_GetFrame(IWICBitmapDecoder *iface,
 987     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 988 {
 989     BmpDecoder *This = (BmpDecoder*)iface;
 990
 991     if (index != 0) return E_INVALIDARG;
 992
 993     if (!This->stream) return WINCODEC_ERR_WRONGSTATE;
 994
 995     if (!This->framedecode)
 996     {
 997         This->framedecode = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpFrameDecode));
 998         if (!This->framedecode) return E_OUTOFMEMORY;
 999
1000         This->framedecode->lpVtbl = &BmpFrameDecode_Vtbl;
1001         This->framedecode->ref = 1;
1002         This->framedecode->stream = This->stream;
1003         IStream_AddRef(This->stream);
1004         This->framedecode->bfh = This->bfh;
1005         This->framedecode->bih = This->bih;
1006         This->framedecode->pixelformat = This->pixelformat;
1007         This->framedecode->bitsperpixel = This->bitsperpixel;
1008         This->framedecode->read_data_func = This->read_data_func;
1009         This->framedecode->imagedata = NULL;
1010     }
1011
1012     *ppIBitmapFrame = (IWICBitmapFrameDecode*)This->framedecode;
1013     IWICBitmapFrameDecode_AddRef((IWICBitmapFrameDecode*)This->framedecode);
1014
1015     return S_OK;
1016 }
1017
1018 static const IWICBitmapDecoderVtbl BmpDecoder_Vtbl = {
1019     BmpDecoder_QueryInterface,
1020     BmpDecoder_AddRef,
1021     BmpDecoder_Release,
1022     BmpDecoder_QueryCapability,
1023     BmpDecoder_Initialize,
1024     BmpDecoder_GetContainerFormat,
1025     BmpDecoder_GetDecoderInfo,
1026     BmpDecoder_CopyPalette,
1027     BmpDecoder_GetMetadataQueryReader,
1028     BmpDecoder_GetPreview,
1029     BmpDecoder_GetColorContexts,
1030     BmpDecoder_GetThumbnail,
1031     BmpDecoder_GetFrameCount,
1032     BmpDecoder_GetFrame
1033 };
1034
1035 HRESULT BmpDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
1036 {
1037     BmpDecoder *This;
1038     HRESULT ret;
1039
1040     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
1041
1042     *ppv = NULL;
1043
1044     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
1045
1046     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpDecoder));
1047     if (!This) return E_OUTOFMEMORY;
1048
1049     This->lpVtbl = &BmpDecoder_Vtbl;
1050     This->ref = 1;
1051     This->initialized = FALSE;
1052     This->stream = NULL;
1053     This->framedecode = NULL;
1054
1055     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
1056     IUnknown_Release((IUnknown*)This);
1057
1058     return ret;
1059 }