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