dll/win32/windowscodecs/bmpencode.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 struct bmp_pixelformat {
  39     const WICPixelFormatGUID *guid;
  40     UINT bpp;
  41     DWORD compression;
  42     DWORD redmask;
  43     DWORD greenmask;
  44     DWORD bluemask;
  45     DWORD alphamask;
  46 };
  47
  48 static const struct bmp_pixelformat formats[] = {
  49     {&GUID_WICPixelFormat24bppBGR, 24, BI_RGB},
  50     {&GUID_WICPixelFormat16bppBGR555, 16, BI_RGB},
  51     {&GUID_WICPixelFormat16bppBGR565, 16, BI_BITFIELDS, 0xf800, 0x7e0, 0x1f, 0},
  52     {&GUID_WICPixelFormat32bppBGR, 32, BI_RGB},
  53 #if 0
  54     /* Windows doesn't seem to support this one. */
  55     {&GUID_WICPixelFormat32bppBGRA, 32, BI_BITFIELDS, 0xff0000, 0xff00, 0xff, 0xff000000},
  56 #endif
  57     {NULL}
  58 };
  59
  60 typedef struct BmpFrameEncode {
  61     const IWICBitmapFrameEncodeVtbl *lpVtbl;
  62     LONG ref;
  63     IStream *stream;
  64     BOOL initialized;
  65     UINT width, height;
  66     BYTE *bits;
  67     const struct bmp_pixelformat *format;
  68     double xres, yres;
  69     UINT lineswritten;
  70     UINT stride;
  71     BOOL committed;
  72 } BmpFrameEncode;
  73
  74 static HRESULT WINAPI BmpFrameEncode_QueryInterface(IWICBitmapFrameEncode *iface, REFIID iid,
  75     void **ppv)
  76 {
  77     BmpFrameEncode *This = (BmpFrameEncode*)iface;
  78     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  79
  80     if (!ppv) return E_INVALIDARG;
  81
  82     if (IsEqualIID(&IID_IUnknown, iid) ||
  83         IsEqualIID(&IID_IWICBitmapFrameEncode, iid))
  84     {
  85         *ppv = This;
  86     }
  87     else
  88     {
  89         *ppv = NULL;
  90         return E_NOINTERFACE;
  91     }
  92
  93     IUnknown_AddRef((IUnknown*)*ppv);
  94     return S_OK;
  95 }
  96
  97 static ULONG WINAPI BmpFrameEncode_AddRef(IWICBitmapFrameEncode *iface)
  98 {
  99     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 100     ULONG ref = InterlockedIncrement(&This->ref);
 101
 102     TRACE("(%p) refcount=%u\n", iface, ref);
 103
 104     return ref;
 105 }
 106
 107 static ULONG WINAPI BmpFrameEncode_Release(IWICBitmapFrameEncode *iface)
 108 {
 109     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 110     ULONG ref = InterlockedDecrement(&This->ref);
 111
 112     TRACE("(%p) refcount=%u\n", iface, ref);
 113
 114     if (ref == 0)
 115     {
 116         if (This->stream) IStream_Release(This->stream);
 117         HeapFree(GetProcessHeap(), 0, This->bits);
 118         HeapFree(GetProcessHeap(), 0, This);
 119     }
 120
 121     return ref;
 122 }
 123
 124 static HRESULT WINAPI BmpFrameEncode_Initialize(IWICBitmapFrameEncode *iface,
 125     IPropertyBag2 *pIEncoderOptions)
 126 {
 127     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 128     TRACE("(%p,%p)\n", iface, pIEncoderOptions);
 129
 130     if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
 131
 132     This->initialized = TRUE;
 133
 134     return S_OK;
 135 }
 136
 137 static HRESULT WINAPI BmpFrameEncode_SetSize(IWICBitmapFrameEncode *iface,
 138     UINT uiWidth, UINT uiHeight)
 139 {
 140     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 141     TRACE("(%p,%u,%u)\n", iface, uiWidth, uiHeight);
 142
 143     if (!This->initialized || This->bits) return WINCODEC_ERR_WRONGSTATE;
 144
 145     This->width = uiWidth;
 146     This->height = uiHeight;
 147
 148     return S_OK;
 149 }
 150
 151 static HRESULT WINAPI BmpFrameEncode_SetResolution(IWICBitmapFrameEncode *iface,
 152     double dpiX, double dpiY)
 153 {
 154     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 155     TRACE("(%p,%0.2f,%0.2f)\n", iface, dpiX, dpiY);
 156
 157     if (!This->initialized || This->bits) return WINCODEC_ERR_WRONGSTATE;
 158
 159     This->xres = dpiX;
 160     This->yres = dpiY;
 161
 162     return S_OK;
 163 }
 164
 165 static HRESULT WINAPI BmpFrameEncode_SetPixelFormat(IWICBitmapFrameEncode *iface,
 166     WICPixelFormatGUID *pPixelFormat)
 167 {
 168     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 169     int i;
 170     TRACE("(%p,%s)\n", iface, debugstr_guid(pPixelFormat));
 171
 172     if (!This->initialized || This->bits) return WINCODEC_ERR_WRONGSTATE;
 173
 174     for (i=0; formats[i].guid; i++)
 175     {
 176         if (memcmp(formats[i].guid, pPixelFormat, sizeof(GUID)) == 0)
 177             break;
 178     }
 179
 180     if (!formats[i].guid) i = 0;
 181
 182     This->format = &formats[i];
 183     memcpy(pPixelFormat, This->format->guid, sizeof(GUID));
 184
 185     return S_OK;
 186 }
 187
 188 static HRESULT WINAPI BmpFrameEncode_SetColorContexts(IWICBitmapFrameEncode *iface,
 189     UINT cCount, IWICColorContext **ppIColorContext)
 190 {
 191     FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
 192     return E_NOTIMPL;
 193 }
 194
 195 static HRESULT WINAPI BmpFrameEncode_SetPalette(IWICBitmapFrameEncode *iface,
 196     IWICPalette *pIPalette)
 197 {
 198     FIXME("(%p,%p): stub\n", iface, pIPalette);
 199     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 200 }
 201
 202 static HRESULT WINAPI BmpFrameEncode_SetThumbnail(IWICBitmapFrameEncode *iface,
 203     IWICBitmapSource *pIThumbnail)
 204 {
 205     FIXME("(%p,%p): stub\n", iface, pIThumbnail);
 206     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 207 }
 208
 209 static HRESULT BmpFrameEncode_AllocateBits(BmpFrameEncode *This)
 210 {
 211     if (!This->bits)
 212     {
 213         if (!This->initialized || !This->width || !This->height || !This->format)
 214             return WINCODEC_ERR_WRONGSTATE;
 215
 216         This->stride = (((This->width * This->format->bpp)+31)/32)*4;
 217         This->bits = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->stride * This->height);
 218         if (!This->bits) return E_OUTOFMEMORY;
 219     }
 220
 221     return S_OK;
 222 }
 223
 224 static HRESULT WINAPI BmpFrameEncode_WritePixels(IWICBitmapFrameEncode *iface,
 225     UINT lineCount, UINT cbStride, UINT cbBufferSize, BYTE *pbPixels)
 226 {
 227     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 228     HRESULT hr;
 229     WICRect rc;
 230     TRACE("(%p,%u,%u,%u,%p)\n", iface, lineCount, cbStride, cbBufferSize, pbPixels);
 231
 232     if (!This->initialized || !This->width || !This->height || !This->format)
 233         return WINCODEC_ERR_WRONGSTATE;
 234
 235     hr = BmpFrameEncode_AllocateBits(This);
 236     if (FAILED(hr)) return hr;
 237
 238     rc.X = 0;
 239     rc.Y = 0;
 240     rc.Width = This->width;
 241     rc.Height = lineCount;
 242
 243     hr = copy_pixels(This->format->bpp, pbPixels, This->width, lineCount, cbStride,
 244         &rc, This->stride, This->stride*(This->height-This->lineswritten),
 245         This->bits + This->stride*This->lineswritten);
 246
 247     if (SUCCEEDED(hr))
 248         This->lineswritten += lineCount;
 249
 250     return hr;
 251 }
 252
 253 static HRESULT WINAPI BmpFrameEncode_WriteSource(IWICBitmapFrameEncode *iface,
 254     IWICBitmapSource *pIBitmapSource, WICRect *prc)
 255 {
 256     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 257     HRESULT hr;
 258     WICRect rc;
 259     WICPixelFormatGUID guid;
 260     TRACE("(%p,%p,%p)\n", iface, pIBitmapSource, prc);
 261
 262     if (!This->initialized || !This->width || !This->height)
 263         return WINCODEC_ERR_WRONGSTATE;
 264
 265     if (!This->format)
 266     {
 267         hr = IWICBitmapSource_GetPixelFormat(pIBitmapSource, &guid);
 268         if (FAILED(hr)) return hr;
 269         hr = BmpFrameEncode_SetPixelFormat(iface, &guid);
 270         if (FAILED(hr)) return hr;
 271     }
 272
 273     hr = IWICBitmapSource_GetPixelFormat(pIBitmapSource, &guid);
 274     if (FAILED(hr)) return hr;
 275     if (memcmp(&guid, This->format->guid, sizeof(GUID)) != 0)
 276     {
 277         /* should use WICConvertBitmapSource to convert, but that's unimplemented */
 278         ERR("format %s unsupported\n", debugstr_guid(&guid));
 279         return E_FAIL;
 280     }
 281
 282     if (This->xres == 0.0 || This->yres == 0.0)
 283     {
 284         double xres, yres;
 285         hr = IWICBitmapSource_GetResolution(pIBitmapSource, &xres, &yres);
 286         if (FAILED(hr)) return hr;
 287         hr = BmpFrameEncode_SetResolution(iface, xres, yres);
 288         if (FAILED(hr)) return hr;
 289     }
 290
 291     if (!prc)
 292     {
 293         UINT width, height;
 294         hr = IWICBitmapSource_GetSize(pIBitmapSource, &width, &height);
 295         if (FAILED(hr)) return hr;
 296         rc.X = 0;
 297         rc.Y = 0;
 298         rc.Width = width;
 299         rc.Height = height;
 300         prc = &rc;
 301     }
 302
 303     if (prc->Width != This->width) return E_INVALIDARG;
 304
 305     hr = BmpFrameEncode_AllocateBits(This);
 306     if (FAILED(hr)) return hr;
 307
 308     hr = IWICBitmapSource_CopyPixels(pIBitmapSource, prc, This->stride,
 309         This->stride*(This->height-This->lineswritten),
 310         This->bits + This->stride*This->lineswritten);
 311
 312     This->lineswritten += rc.Height;
 313
 314     return S_OK;
 315 }
 316
 317 static HRESULT WINAPI BmpFrameEncode_Commit(IWICBitmapFrameEncode *iface)
 318 {
 319     BmpFrameEncode *This = (BmpFrameEncode*)iface;
 320     BITMAPFILEHEADER bfh;
 321     BITMAPV5HEADER bih;
 322     UINT info_size;
 323     LARGE_INTEGER pos;
 324     ULONG byteswritten;
 325     HRESULT hr;
 326
 327     TRACE("(%p)\n", iface);
 328
 329     if (!This->bits || This->committed || This->height != This->lineswritten)
 330         return WINCODEC_ERR_WRONGSTATE;
 331
 332     bfh.bfType = 0x4d42; /* "BM" */
 333     bfh.bfReserved1 = 0;
 334     bfh.bfReserved2 = 0;
 335
 336     bih.bV5Size = info_size = sizeof(BITMAPINFOHEADER);
 337     bih.bV5Width = This->width;
 338     bih.bV5Height = -This->height; /* top-down bitmap */
 339     bih.bV5Planes = 1;
 340     bih.bV5BitCount = This->format->bpp;
 341     bih.bV5Compression = This->format->compression;
 342     bih.bV5SizeImage = This->stride*This->height;
 343     bih.bV5XPelsPerMeter = (This->xres+0.0127) / 0.0254;
 344     bih.bV5YPelsPerMeter = (This->yres+0.0127) / 0.0254;
 345     bih.bV5ClrUsed = 0;
 346     bih.bV5ClrImportant = 0;
 347
 348     if (This->format->compression == BI_BITFIELDS)
 349     {
 350         if (This->format->alphamask)
 351             bih.bV5Size = info_size = sizeof(BITMAPV4HEADER);
 352         else
 353             info_size = sizeof(BITMAPINFOHEADER)+12;
 354         bih.bV5RedMask = This->format->redmask;
 355         bih.bV5GreenMask = This->format->greenmask;
 356         bih.bV5BlueMask = This->format->bluemask;
 357         bih.bV5AlphaMask = This->format->alphamask;
 358         bih.bV5AlphaMask = LCS_DEVICE_RGB;
 359     }
 360
 361     bfh.bfSize = sizeof(BITMAPFILEHEADER) + info_size + bih.bV5SizeImage;
 362     bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + info_size;
 363
 364     pos.QuadPart = 0;
 365     hr = IStream_Seek(This->stream, pos, STREAM_SEEK_SET, NULL);
 366     if (FAILED(hr)) return hr;
 367
 368     hr = IStream_Write(This->stream, &bfh, sizeof(BITMAPFILEHEADER), &byteswritten);
 369     if (FAILED(hr)) return hr;
 370     if (byteswritten != sizeof(BITMAPFILEHEADER)) return E_FAIL;
 371
 372     hr = IStream_Write(This->stream, &bih, info_size, &byteswritten);
 373     if (FAILED(hr)) return hr;
 374     if (byteswritten != info_size) return E_FAIL;
 375
 376     hr = IStream_Write(This->stream, This->bits, bih.bV5SizeImage, &byteswritten);
 377     if (FAILED(hr)) return hr;
 378     if (byteswritten != bih.bV5SizeImage) return E_FAIL;
 379
 380     This->committed = TRUE;
 381
 382     return S_OK;
 383 }
 384
 385 static HRESULT WINAPI BmpFrameEncode_GetMetadataQueryWriter(IWICBitmapFrameEncode *iface,
 386     IWICMetadataQueryWriter **ppIMetadataQueryWriter)
 387 {
 388     FIXME("(%p, %p): stub\n", iface, ppIMetadataQueryWriter);
 389     return E_NOTIMPL;
 390 }
 391
 392 static const IWICBitmapFrameEncodeVtbl BmpFrameEncode_Vtbl = {
 393     BmpFrameEncode_QueryInterface,
 394     BmpFrameEncode_AddRef,
 395     BmpFrameEncode_Release,
 396     BmpFrameEncode_Initialize,
 397     BmpFrameEncode_SetSize,
 398     BmpFrameEncode_SetResolution,
 399     BmpFrameEncode_SetPixelFormat,
 400     BmpFrameEncode_SetColorContexts,
 401     BmpFrameEncode_SetPalette,
 402     BmpFrameEncode_SetThumbnail,
 403     BmpFrameEncode_WritePixels,
 404     BmpFrameEncode_WriteSource,
 405     BmpFrameEncode_Commit,
 406     BmpFrameEncode_GetMetadataQueryWriter
 407 };
 408
 409 typedef struct BmpEncoder {
 410     const IWICBitmapEncoderVtbl *lpVtbl;
 411     LONG ref;
 412     IStream *stream;
 413     IWICBitmapFrameEncode *frame;
 414 } BmpEncoder;
 415
 416 static HRESULT WINAPI BmpEncoder_QueryInterface(IWICBitmapEncoder *iface, REFIID iid,
 417     void **ppv)
 418 {
 419     BmpEncoder *This = (BmpEncoder*)iface;
 420     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 421
 422     if (!ppv) return E_INVALIDARG;
 423
 424     if (IsEqualIID(&IID_IUnknown, iid) ||
 425         IsEqualIID(&IID_IWICBitmapEncoder, iid))
 426     {
 427         *ppv = This;
 428     }
 429     else
 430     {
 431         *ppv = NULL;
 432         return E_NOINTERFACE;
 433     }
 434
 435     IUnknown_AddRef((IUnknown*)*ppv);
 436     return S_OK;
 437 }
 438
 439 static ULONG WINAPI BmpEncoder_AddRef(IWICBitmapEncoder *iface)
 440 {
 441     BmpEncoder *This = (BmpEncoder*)iface;
 442     ULONG ref = InterlockedIncrement(&This->ref);
 443
 444     TRACE("(%p) refcount=%u\n", iface, ref);
 445
 446     return ref;
 447 }
 448
 449 static ULONG WINAPI BmpEncoder_Release(IWICBitmapEncoder *iface)
 450 {
 451     BmpEncoder *This = (BmpEncoder*)iface;
 452     ULONG ref = InterlockedDecrement(&This->ref);
 453
 454     TRACE("(%p) refcount=%u\n", iface, ref);
 455
 456     if (ref == 0)
 457     {
 458         if (This->stream) IStream_Release(This->stream);
 459         if (This->frame) IWICBitmapFrameEncode_Release(This->frame);
 460         HeapFree(GetProcessHeap(), 0, This);
 461     }
 462
 463     return ref;
 464 }
 465
 466 static HRESULT WINAPI BmpEncoder_Initialize(IWICBitmapEncoder *iface,
 467     IStream *pIStream, WICBitmapEncoderCacheOption cacheOption)
 468 {
 469     BmpEncoder *This = (BmpEncoder*)iface;
 470
 471     TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOption);
 472
 473     IStream_AddRef(pIStream);
 474     This->stream = pIStream;
 475
 476     return S_OK;
 477 }
 478
 479 static HRESULT WINAPI BmpEncoder_GetContainerFormat(IWICBitmapEncoder *iface,
 480     GUID *pguidContainerFormat)
 481 {
 482     FIXME("(%p,%s): stub\n", iface, debugstr_guid(pguidContainerFormat));
 483     return E_NOTIMPL;
 484 }
 485
 486 static HRESULT WINAPI BmpEncoder_GetEncoderInfo(IWICBitmapEncoder *iface,
 487     IWICBitmapEncoderInfo **ppIEncoderInfo)
 488 {
 489     FIXME("(%p,%p): stub\n", iface, ppIEncoderInfo);
 490     return E_NOTIMPL;
 491 }
 492
 493 static HRESULT WINAPI BmpEncoder_SetColorContexts(IWICBitmapEncoder *iface,
 494     UINT cCount, IWICColorContext **ppIColorContext)
 495 {
 496     FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
 497     return E_NOTIMPL;
 498 }
 499
 500 static HRESULT WINAPI BmpEncoder_SetPalette(IWICBitmapEncoder *iface, IWICPalette *pIPalette)
 501 {
 502     TRACE("(%p,%p)\n", iface, pIPalette);
 503     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 504 }
 505
 506 static HRESULT WINAPI BmpEncoder_SetThumbnail(IWICBitmapEncoder *iface, IWICBitmapSource *pIThumbnail)
 507 {
 508     TRACE("(%p,%p)\n", iface, pIThumbnail);
 509     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 510 }
 511
 512 static HRESULT WINAPI BmpEncoder_SetPreview(IWICBitmapEncoder *iface, IWICBitmapSource *pIPreview)
 513 {
 514     TRACE("(%p,%p)\n", iface, pIPreview);
 515     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 516 }
 517
 518 static HRESULT WINAPI BmpEncoder_CreateNewFrame(IWICBitmapEncoder *iface,
 519     IWICBitmapFrameEncode **ppIFrameEncode, IPropertyBag2 **ppIEncoderOptions)
 520 {
 521     BmpEncoder *This = (BmpEncoder*)iface;
 522     BmpFrameEncode *encode;
 523     HRESULT hr;
 524
 525     TRACE("(%p,%p,%p)\n", iface, ppIFrameEncode, ppIEncoderOptions);
 526
 527     if (This->frame) return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 528
 529     if (!This->stream) return WINCODEC_ERR_NOTINITIALIZED;
 530
 531     hr = CreatePropertyBag2(ppIEncoderOptions);
 532     if (FAILED(hr)) return hr;
 533
 534     encode = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpFrameEncode));
 535     if (!encode)
 536     {
 537         IPropertyBag2_Release(*ppIEncoderOptions);
 538         *ppIEncoderOptions = NULL;
 539         return E_OUTOFMEMORY;
 540     }
 541     encode->lpVtbl = &BmpFrameEncode_Vtbl;
 542     encode->ref = 2;
 543     IStream_AddRef(This->stream);
 544     encode->stream = This->stream;
 545     encode->initialized = FALSE;
 546     encode->width = 0;
 547     encode->height = 0;
 548     encode->bits = NULL;
 549     encode->format = NULL;
 550     encode->xres = 0.0;
 551     encode->yres = 0.0;
 552     encode->lineswritten = 0;
 553     encode->committed = FALSE;
 554
 555     *ppIFrameEncode = (IWICBitmapFrameEncode*)encode;
 556     This->frame = (IWICBitmapFrameEncode*)encode;
 557
 558     return S_OK;
 559 }
 560
 561 static HRESULT WINAPI BmpEncoder_Commit(IWICBitmapEncoder *iface)
 562 {
 563     BmpEncoder *This = (BmpEncoder*)iface;
 564     BmpFrameEncode *frame = (BmpFrameEncode*)This->frame;
 565     TRACE("(%p)\n", iface);
 566
 567     if (!frame || !frame->committed) return WINCODEC_ERR_WRONGSTATE;
 568
 569     return S_OK;
 570 }
 571
 572 static HRESULT WINAPI BmpEncoder_GetMetadataQueryWriter(IWICBitmapEncoder *iface,
 573     IWICMetadataQueryWriter **ppIMetadataQueryWriter)
 574 {
 575     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryWriter);
 576     return E_NOTIMPL;
 577 }
 578
 579 static const IWICBitmapEncoderVtbl BmpEncoder_Vtbl = {
 580     BmpEncoder_QueryInterface,
 581     BmpEncoder_AddRef,
 582     BmpEncoder_Release,
 583     BmpEncoder_Initialize,
 584     BmpEncoder_GetContainerFormat,
 585     BmpEncoder_GetEncoderInfo,
 586     BmpEncoder_SetColorContexts,
 587     BmpEncoder_SetPalette,
 588     BmpEncoder_SetThumbnail,
 589     BmpEncoder_SetPreview,
 590     BmpEncoder_CreateNewFrame,
 591     BmpEncoder_Commit,
 592     BmpEncoder_GetMetadataQueryWriter
 593 };
 594
 595 HRESULT BmpEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 596 {
 597     BmpEncoder *This;
 598     HRESULT ret;
 599
 600     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 601
 602     *ppv = NULL;
 603
 604     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 605
 606     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpEncoder));
 607     if (!This) return E_OUTOFMEMORY;
 608
 609     This->lpVtbl = &BmpEncoder_Vtbl;
 610     This->ref = 1;
 611     This->stream = NULL;
 612     This->frame = NULL;
 613
 614     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 615     IUnknown_Release((IUnknown*)This);
 616
 617     return ret;
 618 }