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     const IWICBitmapDecoderVtbl *lpVtbl;
  61     LONG ref;
  62     BOOL initialized;
  63     IStream *stream;
  64     ICONHEADER header;
  65 } IcoDecoder;
  66
  67 typedef struct {
  68     const IWICBitmapFrameDecodeVtbl *lpVtbl;
  69     LONG ref;
  70     ICONDIRENTRY entry;
  71     IcoDecoder *parent;
  72     BYTE *bits;
  73 } IcoFrameDecode;
  74
  75 static HRESULT WINAPI IcoFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
  76     void **ppv)
  77 {
  78     IcoFrameDecode *This = (IcoFrameDecode*)iface;
  79     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  80
  81     if (!ppv) return E_INVALIDARG;
  82
  83     if (IsEqualIID(&IID_IUnknown, iid) ||
  84         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  85         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
  86     {
  87         *ppv = This;
  88     }
  89     else
  90     {
  91         *ppv = NULL;
  92         return E_NOINTERFACE;
  93     }
  94
  95     IUnknown_AddRef((IUnknown*)*ppv);
  96     return S_OK;
  97 }
  98
  99 static ULONG WINAPI IcoFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
 100 {
 101     IcoFrameDecode *This = (IcoFrameDecode*)iface;
 102     ULONG ref = InterlockedIncrement(&This->ref);
 103
 104     TRACE("(%p) refcount=%u\n", iface, ref);
 105
 106     return ref;
 107 }
 108
 109 static ULONG WINAPI IcoFrameDecode_Release(IWICBitmapFrameDecode *iface)
 110 {
 111     IcoFrameDecode *This = (IcoFrameDecode*)iface;
 112     ULONG ref = InterlockedDecrement(&This->ref);
 113
 114     TRACE("(%p) refcount=%u\n", iface, ref);
 115
 116     if (ref == 0)
 117     {
 118         IUnknown_Release((IUnknown*)This->parent);
 119         HeapFree(GetProcessHeap(), 0, This->bits);
 120         HeapFree(GetProcessHeap(), 0, This);
 121     }
 122
 123     return ref;
 124 }
 125
 126 static HRESULT WINAPI IcoFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
 127     UINT *puiWidth, UINT *puiHeight)
 128 {
 129     IcoFrameDecode *This = (IcoFrameDecode*)iface;
 130
 131     *puiWidth = This->entry.bWidth ? This->entry.bWidth : 256;
 132     *puiHeight = This->entry.bHeight ? This->entry.bHeight : 256;
 133
 134     TRACE("(%p) -> (%i,%i)\n", iface, *puiWidth, *puiHeight);
 135
 136     return S_OK;
 137 }
 138
 139 static HRESULT WINAPI IcoFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
 140     WICPixelFormatGUID *pPixelFormat)
 141 {
 142     memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
 143     return S_OK;
 144 }
 145
 146 static HRESULT WINAPI IcoFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
 147     double *pDpiX, double *pDpiY)
 148 {
 149     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 150     return E_NOTIMPL;
 151 }
 152
 153 static HRESULT WINAPI IcoFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
 154     IWICPalette *pIPalette)
 155 {
 156     TRACE("(%p,%p)\n", iface, pIPalette);
 157     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 158 }
 159
 160 static inline void pixel_set_trans(DWORD* pixel, BOOL transparent)
 161 {
 162     if (transparent) *pixel = 0;
 163     else *pixel |= 0xff000000;
 164 }
 165
 166 static HRESULT IcoFrameDecode_ReadPixels(IcoFrameDecode *This)
 167 {
 168     BITMAPINFOHEADER bih;
 169     DWORD colors[256];
 170     UINT colorcount=0;
 171     LARGE_INTEGER seek;
 172     ULONG bytesread;
 173     HRESULT hr;
 174     BYTE *tempdata = NULL;
 175     BYTE *bits = NULL;
 176     UINT bitsStride;
 177     UINT bitsSize;
 178     UINT width, height;
 179
 180     width = This->entry.bWidth ? This->entry.bWidth : 256;
 181     height = This->entry.bHeight ? This->entry.bHeight : 256;
 182
 183     /* read the BITMAPINFOHEADER */
 184     seek.QuadPart = This->entry.dwDIBOffset;
 185     hr = IStream_Seek(This->parent->stream, seek, STREAM_SEEK_SET, NULL);
 186     if (FAILED(hr)) goto fail;
 187
 188     hr = IStream_Read(This->parent->stream, &bih, sizeof(BITMAPINFOHEADER), &bytesread);
 189     if (FAILED(hr) || bytesread != sizeof(BITMAPINFOHEADER)) goto fail;
 190
 191     if (This->entry.wBitCount <= 8)
 192     {
 193         /* read the palette */
 194         colorcount = This->entry.bColorCount ? This->entry.bColorCount : 256;
 195
 196         hr = IStream_Read(This->parent->stream, colors, sizeof(RGBQUAD)*colorcount, &bytesread);
 197         if (FAILED(hr) || bytesread != sizeof(RGBQUAD)*colorcount) goto fail;
 198     }
 199
 200     bitsStride = width * 4;
 201     bitsSize = bitsStride * height;
 202
 203     /* read the XOR data */
 204     switch (This->entry.wBitCount)
 205     {
 206     case 1:
 207     {
 208         UINT xorBytesPerRow = (width+31)/32*4;
 209         UINT xorBytes = xorBytesPerRow * height;
 210         INT xorStride;
 211         BYTE *xorRow;
 212         BYTE *bitsRow;
 213         UINT x, y;
 214
 215         tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
 216         if (!tempdata)
 217         {
 218             hr = E_OUTOFMEMORY;
 219             goto fail;
 220         }
 221
 222         hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
 223         if (FAILED(hr) || bytesread != xorBytes) goto fail;
 224
 225         if (bih.biHeight > 0) /* bottom-up DIB */
 226         {
 227             xorStride = -xorBytesPerRow;
 228             xorRow = tempdata + (height-1)*xorBytesPerRow;
 229         }
 230         else /* top-down DIB */
 231         {
 232             xorStride = xorBytesPerRow;
 233             xorRow = tempdata;
 234         }
 235
 236         bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
 237
 238         /* palette-map the 1-bit data */
 239         bitsRow = bits;
 240         for (y=0; y<height; y++) {
 241             BYTE *xorByte=xorRow;
 242             DWORD *bitsPixel=(DWORD*)bitsRow;
 243             for (x=0; x<width; x+=8) {
 244                 BYTE xorVal;
 245                 xorVal=*xorByte++;
 246                 *bitsPixel++ = colors[xorVal>>7];
 247                 if (x+1 < width) *bitsPixel++ = colors[xorVal>>6&1];
 248                 if (x+2 < width) *bitsPixel++ = colors[xorVal>>5&1];
 249                 if (x+3 < width) *bitsPixel++ = colors[xorVal>>4&1];
 250                 if (x+4 < width) *bitsPixel++ = colors[xorVal>>3&1];
 251                 if (x+5 < width) *bitsPixel++ = colors[xorVal>>2&1];
 252                 if (x+6 < width) *bitsPixel++ = colors[xorVal>>1&1];
 253                 if (x+7 < width) *bitsPixel++ = colors[xorVal&1];
 254             }
 255             xorRow += xorStride;
 256             bitsRow += bitsStride;
 257         }
 258
 259         HeapFree(GetProcessHeap(), 0, tempdata);
 260         break;
 261     }
 262     case 4:
 263     {
 264         UINT xorBytesPerRow = (width+7)/8*4;
 265         UINT xorBytes = xorBytesPerRow * height;
 266         INT xorStride;
 267         BYTE *xorRow;
 268         BYTE *bitsRow;
 269         UINT x, y;
 270
 271         tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
 272         if (!tempdata)
 273         {
 274             hr = E_OUTOFMEMORY;
 275             goto fail;
 276         }
 277
 278         hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
 279         if (FAILED(hr) || bytesread != xorBytes) goto fail;
 280
 281         if (bih.biHeight > 0) /* bottom-up DIB */
 282         {
 283             xorStride = -xorBytesPerRow;
 284             xorRow = tempdata + (height-1)*xorBytesPerRow;
 285         }
 286         else /* top-down DIB */
 287         {
 288             xorStride = xorBytesPerRow;
 289             xorRow = tempdata;
 290         }
 291
 292         bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
 293
 294         /* palette-map the 4-bit data */
 295         bitsRow = bits;
 296         for (y=0; y<height; y++) {
 297             BYTE *xorByte=xorRow;
 298             DWORD *bitsPixel=(DWORD*)bitsRow;
 299             for (x=0; x<width; x+=2) {
 300                 BYTE xorVal;
 301                 xorVal=*xorByte++;
 302                 *bitsPixel++ = colors[xorVal>>4];
 303                 if (x+1 < width) *bitsPixel++ = colors[xorVal&0xf];
 304             }
 305             xorRow += xorStride;
 306             bitsRow += bitsStride;
 307         }
 308
 309         HeapFree(GetProcessHeap(), 0, tempdata);
 310         break;
 311     }
 312     case 8:
 313     {
 314         UINT xorBytesPerRow = (width+3)/4*4;
 315         UINT xorBytes = xorBytesPerRow * height;
 316         INT xorStride;
 317         BYTE *xorRow;
 318         BYTE *bitsRow;
 319         UINT x, y;
 320
 321         tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
 322         if (!tempdata)
 323         {
 324             hr = E_OUTOFMEMORY;
 325             goto fail;
 326         }
 327
 328         hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
 329         if (FAILED(hr) || bytesread != xorBytes) goto fail;
 330
 331         if (bih.biHeight > 0) /* bottom-up DIB */
 332         {
 333             xorStride = -xorBytesPerRow;
 334             xorRow = tempdata + (height-1)*xorBytesPerRow;
 335         }
 336         else /* top-down DIB */
 337         {
 338             xorStride = xorBytesPerRow;
 339             xorRow = tempdata;
 340         }
 341
 342         bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
 343
 344         /* palette-map the 8-bit data */
 345         bitsRow = bits;
 346         for (y=0; y<height; y++) {
 347             BYTE *xorByte=xorRow;
 348             DWORD *bitsPixel=(DWORD*)bitsRow;
 349             for (x=0; x<width; x++)
 350                 *bitsPixel++ = colors[*xorByte++];
 351             xorRow += xorStride;
 352             bitsRow += bitsStride;
 353         }
 354
 355         HeapFree(GetProcessHeap(), 0, tempdata);
 356         break;
 357     }
 358     case 24:
 359     {
 360         UINT xorBytesPerRow = (width*3+3)/4*4;
 361         UINT xorBytes = xorBytesPerRow * height;
 362         INT xorStride;
 363         BYTE *xorRow;
 364         BYTE *bitsRow;
 365         UINT x, y;
 366
 367         tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
 368         if (!tempdata)
 369         {
 370             hr = E_OUTOFMEMORY;
 371             goto fail;
 372         }
 373
 374         hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
 375         if (FAILED(hr) || bytesread != xorBytes) goto fail;
 376
 377         if (bih.biHeight > 0) /* bottom-up DIB */
 378         {
 379             xorStride = -xorBytesPerRow;
 380             xorRow = tempdata + (height-1)*xorBytesPerRow;
 381         }
 382         else /* top-down DIB */
 383         {
 384             xorStride = xorBytesPerRow;
 385             xorRow = tempdata;
 386         }
 387
 388         bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
 389
 390         /* copy BGR->BGRA */
 391         bitsRow = bits;
 392         for (y=0; y<height; y++) {
 393             BYTE *xorByte=xorRow;
 394             BYTE *bitsByte=bitsRow;
 395             for (x=0; x<width; x++)
 396             {
 397                 *bitsByte++ = *xorByte++; /* blue */
 398                 *bitsByte++ = *xorByte++; /* green */
 399                 *bitsByte++ = *xorByte++; /* red */
 400                 bitsByte++; /* alpha */
 401             }
 402             xorRow += xorStride;
 403             bitsRow += bitsStride;
 404         }
 405
 406         HeapFree(GetProcessHeap(), 0, tempdata);
 407         break;
 408     }
 409     case 32:
 410     {
 411         UINT xorBytesPerRow = width*4;
 412         UINT xorBytes = xorBytesPerRow * height;
 413
 414         bits = HeapAlloc(GetProcessHeap(), 0, xorBytes);
 415         if (!bits)
 416         {
 417             hr = E_OUTOFMEMORY;
 418             goto fail;
 419         }
 420
 421         if (bih.biHeight > 0) /* bottom-up DIB */
 422         {
 423             /* read the rows backwards so we get a top-down DIB */
 424             UINT i;
 425             BYTE *xorRow = bits + xorBytesPerRow * (height-1);
 426
 427             for (i=0; i<height; i++)
 428             {
 429                 hr = IStream_Read(This->parent->stream, xorRow, xorBytesPerRow, &bytesread);
 430                 if (FAILED(hr) || bytesread != xorBytesPerRow) goto fail;
 431                 xorRow -= xorBytesPerRow;
 432             }
 433         }
 434         else /* top-down DIB */
 435         {
 436             hr = IStream_Read(This->parent->stream, bits, xorBytes, &bytesread);
 437             if (FAILED(hr) || bytesread != xorBytes) goto fail;
 438         }
 439         break;
 440     }
 441     default:
 442         FIXME("unsupported bitcount: %u\n", This->entry.wBitCount);
 443         goto fail;
 444     }
 445
 446     if (This->entry.wBitCount < 32)
 447     {
 448         /* set alpha data based on the AND mask */
 449         UINT andBytesPerRow = (width+31)/32*4;
 450         UINT andBytes = andBytesPerRow * height;
 451         INT andStride;
 452         BYTE *andRow;
 453         BYTE *bitsRow;
 454         UINT x, y;
 455
 456         tempdata = HeapAlloc(GetProcessHeap(), 0, andBytes);
 457         if (!tempdata)
 458         {
 459             hr = E_OUTOFMEMORY;
 460             goto fail;
 461         }
 462
 463         hr = IStream_Read(This->parent->stream, tempdata, andBytes, &bytesread);
 464         if (FAILED(hr) || bytesread != andBytes) goto fail;
 465
 466         if (bih.biHeight > 0) /* bottom-up DIB */
 467         {
 468             andStride = -andBytesPerRow;
 469             andRow = tempdata + (height-1)*andBytesPerRow;
 470         }
 471         else /* top-down DIB */
 472         {
 473             andStride = andBytesPerRow;
 474             andRow = tempdata;
 475         }
 476
 477         bitsRow = bits;
 478         for (y=0; y<height; y++) {
 479             BYTE *andByte=andRow;
 480             DWORD *bitsPixel=(DWORD*)bitsRow;
 481             for (x=0; x<width; x+=8) {
 482                 BYTE andVal=*andByte++;
 483                 pixel_set_trans(bitsPixel++, andVal>>7&1);
 484                 if (x+1 < width) pixel_set_trans(bitsPixel++, andVal>>6&1);
 485                 if (x+2 < width) pixel_set_trans(bitsPixel++, andVal>>5&1);
 486                 if (x+3 < width) pixel_set_trans(bitsPixel++, andVal>>4&1);
 487                 if (x+4 < width) pixel_set_trans(bitsPixel++, andVal>>3&1);
 488                 if (x+5 < width) pixel_set_trans(bitsPixel++, andVal>>2&1);
 489                 if (x+6 < width) pixel_set_trans(bitsPixel++, andVal>>1&1);
 490                 if (x+7 < width) pixel_set_trans(bitsPixel++, andVal&1);
 491             }
 492             andRow += andStride;
 493             bitsRow += bitsStride;
 494         }
 495
 496         HeapFree(GetProcessHeap(), 0, tempdata);
 497     }
 498
 499     This->bits = bits;
 500
 501     return S_OK;
 502
 503 fail:
 504     HeapFree(GetProcessHeap(), 0, tempdata);
 505     HeapFree(GetProcessHeap(), 0, bits);
 506     if (SUCCEEDED(hr)) hr = E_FAIL;
 507     TRACE("<-- %x\n", hr);
 508     return hr;
 509 }
 510
 511 static HRESULT WINAPI IcoFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
 512     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 513 {
 514     IcoFrameDecode *This = (IcoFrameDecode*)iface;
 515     HRESULT hr;
 516     UINT width, height, stride;
 517     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 518
 519     if (!This->bits)
 520     {
 521         hr = IcoFrameDecode_ReadPixels(This);
 522         if (FAILED(hr)) return hr;
 523     }
 524
 525     width = This->entry.bWidth ? This->entry.bWidth : 256;
 526     height = This->entry.bHeight ? This->entry.bHeight : 256;
 527     stride = width * 4;
 528
 529     return copy_pixels(32, This->bits, width, height, stride,
 530         prc, cbStride, cbBufferSize, pbBuffer);
 531 }
 532
 533 static HRESULT WINAPI IcoFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 534     IWICMetadataQueryReader **ppIMetadataQueryReader)
 535 {
 536     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 537     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 538 }
 539
 540 static HRESULT WINAPI IcoFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
 541     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 542 {
 543     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 544     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 545 }
 546
 547 static HRESULT WINAPI IcoFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
 548     IWICBitmapSource **ppIThumbnail)
 549 {
 550     TRACE("(%p,%p)\n", iface, ppIThumbnail);
 551     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 552 }
 553
 554 static const IWICBitmapFrameDecodeVtbl IcoFrameDecode_Vtbl = {
 555     IcoFrameDecode_QueryInterface,
 556     IcoFrameDecode_AddRef,
 557     IcoFrameDecode_Release,
 558     IcoFrameDecode_GetSize,
 559     IcoFrameDecode_GetPixelFormat,
 560     IcoFrameDecode_GetResolution,
 561     IcoFrameDecode_CopyPalette,
 562     IcoFrameDecode_CopyPixels,
 563     IcoFrameDecode_GetMetadataQueryReader,
 564     IcoFrameDecode_GetColorContexts,
 565     IcoFrameDecode_GetThumbnail
 566 };
 567
 568 static HRESULT WINAPI IcoDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
 569     void **ppv)
 570 {
 571     IcoDecoder *This = (IcoDecoder*)iface;
 572     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 573
 574     if (!ppv) return E_INVALIDARG;
 575
 576     if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
 577     {
 578         *ppv = This;
 579     }
 580     else
 581     {
 582         *ppv = NULL;
 583         return E_NOINTERFACE;
 584     }
 585
 586     IUnknown_AddRef((IUnknown*)*ppv);
 587     return S_OK;
 588 }
 589
 590 static ULONG WINAPI IcoDecoder_AddRef(IWICBitmapDecoder *iface)
 591 {
 592     IcoDecoder *This = (IcoDecoder*)iface;
 593     ULONG ref = InterlockedIncrement(&This->ref);
 594
 595     TRACE("(%p) refcount=%u\n", iface, ref);
 596
 597     return ref;
 598 }
 599
 600 static ULONG WINAPI IcoDecoder_Release(IWICBitmapDecoder *iface)
 601 {
 602     IcoDecoder *This = (IcoDecoder*)iface;
 603     ULONG ref = InterlockedDecrement(&This->ref);
 604
 605     TRACE("(%p) refcount=%u\n", iface, ref);
 606
 607     if (ref == 0)
 608     {
 609         if (This->stream) IStream_Release(This->stream);
 610         HeapFree(GetProcessHeap(), 0, This);
 611     }
 612
 613     return ref;
 614 }
 615
 616 static HRESULT WINAPI IcoDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
 617     DWORD *pdwCapability)
 618 {
 619     FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
 620     return E_NOTIMPL;
 621 }
 622
 623 static HRESULT WINAPI IcoDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 624     WICDecodeOptions cacheOptions)
 625 {
 626     IcoDecoder *This = (IcoDecoder*)iface;
 627     LARGE_INTEGER seek;
 628     HRESULT hr;
 629     ULONG bytesread;
 630     TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
 631
 632     if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
 633
 634     seek.QuadPart = 0;
 635     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 636     if (FAILED(hr)) return hr;
 637
 638     hr = IStream_Read(pIStream, &This->header, sizeof(ICONHEADER), &bytesread);
 639     if (FAILED(hr)) return hr;
 640     if (bytesread != sizeof(ICONHEADER) ||
 641         This->header.idReserved != 0 ||
 642         This->header.idType != 1) return E_FAIL;
 643
 644     This->initialized = TRUE;
 645     This->stream = pIStream;
 646     IStream_AddRef(pIStream);
 647
 648     return S_OK;
 649 }
 650
 651 static HRESULT WINAPI IcoDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 652     GUID *pguidContainerFormat)
 653 {
 654     FIXME("(%p,%p): stub\n", iface, pguidContainerFormat);
 655     return E_NOTIMPL;
 656 }
 657
 658 static HRESULT WINAPI IcoDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 659     IWICBitmapDecoderInfo **ppIDecoderInfo)
 660 {
 661     FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
 662     return E_NOTIMPL;
 663 }
 664
 665 static HRESULT WINAPI IcoDecoder_CopyPalette(IWICBitmapDecoder *iface,
 666     IWICPalette *pIPalette)
 667 {
 668     TRACE("(%p,%p)\n", iface, pIPalette);
 669     return WINCODEC_ERR_PALETTEUNAVAILABLE;
 670 }
 671
 672 static HRESULT WINAPI IcoDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 673     IWICMetadataQueryReader **ppIMetadataQueryReader)
 674 {
 675     TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
 676     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 677 }
 678
 679 static HRESULT WINAPI IcoDecoder_GetPreview(IWICBitmapDecoder *iface,
 680     IWICBitmapSource **ppIBitmapSource)
 681 {
 682     TRACE("(%p,%p)\n", iface, ppIBitmapSource);
 683     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 684 }
 685
 686 static HRESULT WINAPI IcoDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 687     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 688 {
 689     TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
 690     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 691 }
 692
 693 static HRESULT WINAPI IcoDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 694     IWICBitmapSource **ppIThumbnail)
 695 {
 696     TRACE("(%p,%p)\n", iface, ppIThumbnail);
 697     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 698 }
 699
 700 static HRESULT WINAPI IcoDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 701     UINT *pCount)
 702 {
 703     IcoDecoder *This = (IcoDecoder*)iface;
 704     TRACE("(%p,%p)\n", iface, pCount);
 705
 706     if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
 707
 708     *pCount = This->header.idCount;
 709     TRACE("<-- %u\n", *pCount);
 710
 711     return S_OK;
 712 }
 713
 714 static HRESULT WINAPI IcoDecoder_GetFrame(IWICBitmapDecoder *iface,
 715     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 716 {
 717     IcoDecoder *This = (IcoDecoder*)iface;
 718     IcoFrameDecode *result;
 719     LARGE_INTEGER seek;
 720     HRESULT hr;
 721     ULONG bytesread;
 722     TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
 723
 724     if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
 725
 726     if (This->header.idCount < index) return E_INVALIDARG;
 727
 728     result = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoFrameDecode));
 729     if (!result) return E_OUTOFMEMORY;
 730
 731     result->lpVtbl = &IcoFrameDecode_Vtbl;
 732     result->ref = 1;
 733     result->parent = This;
 734     result->bits = NULL;
 735
 736     /* read the icon entry */
 737     seek.QuadPart = sizeof(ICONHEADER) + sizeof(ICONDIRENTRY) * index;
 738     hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, 0);
 739     if (FAILED(hr)) goto fail;
 740
 741     hr = IStream_Read(This->stream, &result->entry, sizeof(ICONDIRENTRY), &bytesread);
 742     if (FAILED(hr) || bytesread != sizeof(ICONDIRENTRY)) goto fail;
 743
 744     IWICBitmapDecoder_AddRef(iface);
 745
 746     *ppIBitmapFrame = (IWICBitmapFrameDecode*)result;
 747
 748     return S_OK;
 749
 750 fail:
 751     HeapFree(GetProcessHeap(), 0, result);
 752     if (SUCCEEDED(hr)) hr = E_FAIL;
 753     TRACE("<-- %x\n", hr);
 754     return hr;
 755 }
 756
 757 static const IWICBitmapDecoderVtbl IcoDecoder_Vtbl = {
 758     IcoDecoder_QueryInterface,
 759     IcoDecoder_AddRef,
 760     IcoDecoder_Release,
 761     IcoDecoder_QueryCapability,
 762     IcoDecoder_Initialize,
 763     IcoDecoder_GetContainerFormat,
 764     IcoDecoder_GetDecoderInfo,
 765     IcoDecoder_CopyPalette,
 766     IcoDecoder_GetMetadataQueryReader,
 767     IcoDecoder_GetPreview,
 768     IcoDecoder_GetColorContexts,
 769     IcoDecoder_GetThumbnail,
 770     IcoDecoder_GetFrameCount,
 771     IcoDecoder_GetFrame
 772 };
 773
 774 HRESULT IcoDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 775 {
 776     IcoDecoder *This;
 777     HRESULT ret;
 778
 779     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 780
 781     *ppv = NULL;
 782
 783     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 784
 785     This = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoDecoder));
 786     if (!This) return E_OUTOFMEMORY;
 787
 788     This->lpVtbl = &IcoDecoder_Vtbl;
 789     This->ref = 1;
 790     This->stream = NULL;
 791     This->initialized = FALSE;
 792
 793     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 794     IUnknown_Release((IUnknown*)This);
 795
 796     return ret;
 797 }