dlls/windowscodecs/converter.c

   1 /*
   2  * Copyright 2009 Vincent Povirk
   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 "objbase.h"
  28 #include "wincodec.h"
  29
  30 #include "wincodecs_private.h"
  31
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  35
  36 struct FormatConverter;
  37
  38 enum pixelformat {
  39     format_1bppIndexed,
  40     format_2bppIndexed,
  41     format_4bppIndexed,
  42     format_8bppIndexed,
  43     format_BlackWhite,
  44     format_2bppGray,
  45     format_4bppGray,
  46     format_8bppGray,
  47     format_16bppGray,
  48     format_16bppBGR555,
  49     format_16bppBGR565,
  50     format_24bppBGR,
  51     format_32bppBGR,
  52     format_32bppBGRA,
  53     format_48bppRGB,
  54     format_64bppRGBA,
  55 };
  56
  57 typedef HRESULT (*copyfunc)(struct FormatConverter *This, const WICRect *prc,
  58     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format);
  59
  60 struct pixelformatinfo {
  61     enum pixelformat format;
  62     const WICPixelFormatGUID *guid;
  63     copyfunc copy_function;
  64 };
  65
  66 typedef struct FormatConverter {
  67     const IWICFormatConverterVtbl *lpVtbl;
  68     LONG ref;
  69     IWICBitmapSource *source;
  70     const struct pixelformatinfo *dst_format, *src_format;
  71     WICBitmapDitherType dither;
  72     double alpha_threshold;
  73     WICBitmapPaletteType palette_type;
  74     CRITICAL_SECTION lock; /* must be held when initialized */
  75 } FormatConverter;
  76
  77 static void make_grayscale_palette(WICColor *colors, UINT num_colors)
  78 {
  79     int i, v;
  80     for (i=0; i<num_colors; i++)
  81     {
  82         v = i * 255 / (num_colors-1);
  83         colors[i] = 0xff000000 | v<<16 | v<<8 | v;
  84     }
  85 }
  86
  87 static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRect *prc,
  88     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format)
  89 {
  90     switch (source_format)
  91     {
  92     case format_1bppIndexed:
  93     case format_BlackWhite:
  94         if (prc)
  95         {
  96             HRESULT res;
  97             UINT x, y;
  98             BYTE *srcdata;
  99             UINT srcstride, srcdatasize;
 100             const BYTE *srcrow;
 101             const BYTE *srcbyte;
 102             BYTE *dstrow;
 103             DWORD *dstpixel;
 104             WICColor colors[2];
 105             IWICPalette *palette;
 106             UINT actualcolors;
 107
 108             if (source_format == format_1bppIndexed)
 109             {
 110                 res = PaletteImpl_Create(&palette);
 111                 if (FAILED(res)) return res;
 112
 113                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 114                 if (SUCCEEDED(res))
 115                     res = IWICPalette_GetColors(palette, 2, colors, &actualcolors);
 116
 117                 IWICPalette_Release(palette);
 118
 119                 if (FAILED(res)) return res;
 120             }
 121             else
 122             {
 123                 colors[0] = 0xff000000;
 124                 colors[1] = 0xffffffff;
 125             }
 126
 127             srcstride = (prc->Width+7)/8;
 128             srcdatasize = srcstride * prc->Height;
 129
 130             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 131             if (!srcdata) return E_OUTOFMEMORY;
 132
 133             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 134
 135             if (SUCCEEDED(res))
 136             {
 137                 srcrow = srcdata;
 138                 dstrow = pbBuffer;
 139                 for (y=0; y<prc->Height; y++) {
 140                     srcbyte=(const BYTE*)srcrow;
 141                     dstpixel=(DWORD*)dstrow;
 142                     for (x=0; x<prc->Width; x+=8) {
 143                         BYTE srcval;
 144                         srcval=*srcbyte++;
 145                         *dstpixel++ = colors[srcval>>7&1];
 146                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval>>6&1];
 147                         if (x+2 < prc->Width) *dstpixel++ = colors[srcval>>5&1];
 148                         if (x+3 < prc->Width) *dstpixel++ = colors[srcval>>4&1];
 149                         if (x+4 < prc->Width) *dstpixel++ = colors[srcval>>3&1];
 150                         if (x+5 < prc->Width) *dstpixel++ = colors[srcval>>2&1];
 151                         if (x+6 < prc->Width) *dstpixel++ = colors[srcval>>1&1];
 152                         if (x+7 < prc->Width) *dstpixel++ = colors[srcval&1];
 153                     }
 154                     srcrow += srcstride;
 155                     dstrow += cbStride;
 156                 }
 157             }
 158
 159             HeapFree(GetProcessHeap(), 0, srcdata);
 160
 161             return res;
 162         }
 163         return S_OK;
 164     case format_2bppIndexed:
 165     case format_2bppGray:
 166         if (prc)
 167         {
 168             HRESULT res;
 169             UINT x, y;
 170             BYTE *srcdata;
 171             UINT srcstride, srcdatasize;
 172             const BYTE *srcrow;
 173             const BYTE *srcbyte;
 174             BYTE *dstrow;
 175             DWORD *dstpixel;
 176             WICColor colors[4];
 177             IWICPalette *palette;
 178             UINT actualcolors;
 179
 180             if (source_format == format_2bppIndexed)
 181             {
 182                 res = PaletteImpl_Create(&palette);
 183                 if (FAILED(res)) return res;
 184
 185                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 186                 if (SUCCEEDED(res))
 187                     res = IWICPalette_GetColors(palette, 4, colors, &actualcolors);
 188
 189                 IWICPalette_Release(palette);
 190
 191                 if (FAILED(res)) return res;
 192             }
 193             else
 194                 make_grayscale_palette(colors, 4);
 195
 196             srcstride = (prc->Width+3)/4;
 197             srcdatasize = srcstride * prc->Height;
 198
 199             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 200             if (!srcdata) return E_OUTOFMEMORY;
 201
 202             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 203
 204             if (SUCCEEDED(res))
 205             {
 206                 srcrow = srcdata;
 207                 dstrow = pbBuffer;
 208                 for (y=0; y<prc->Height; y++) {
 209                     srcbyte=(const BYTE*)srcrow;
 210                     dstpixel=(DWORD*)dstrow;
 211                     for (x=0; x<prc->Width; x+=4) {
 212                         BYTE srcval;
 213                         srcval=*srcbyte++;
 214                         *dstpixel++ = colors[srcval>>6];
 215                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval>>4&0x3];
 216                         if (x+2 < prc->Width) *dstpixel++ = colors[srcval>>2&0x3];
 217                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval&0x3];
 218                     }
 219                     srcrow += srcstride;
 220                     dstrow += cbStride;
 221                 }
 222             }
 223
 224             HeapFree(GetProcessHeap(), 0, srcdata);
 225
 226             return res;
 227         }
 228         return S_OK;
 229     case format_4bppIndexed:
 230     case format_4bppGray:
 231         if (prc)
 232         {
 233             HRESULT res;
 234             UINT x, y;
 235             BYTE *srcdata;
 236             UINT srcstride, srcdatasize;
 237             const BYTE *srcrow;
 238             const BYTE *srcbyte;
 239             BYTE *dstrow;
 240             DWORD *dstpixel;
 241             WICColor colors[16];
 242             IWICPalette *palette;
 243             UINT actualcolors;
 244
 245             if (source_format == format_4bppIndexed)
 246             {
 247                 res = PaletteImpl_Create(&palette);
 248                 if (FAILED(res)) return res;
 249
 250                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 251                 if (SUCCEEDED(res))
 252                     res = IWICPalette_GetColors(palette, 16, colors, &actualcolors);
 253
 254                 IWICPalette_Release(palette);
 255
 256                 if (FAILED(res)) return res;
 257             }
 258             else
 259                 make_grayscale_palette(colors, 16);
 260
 261             srcstride = (prc->Width+1)/2;
 262             srcdatasize = srcstride * prc->Height;
 263
 264             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 265             if (!srcdata) return E_OUTOFMEMORY;
 266
 267             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 268
 269             if (SUCCEEDED(res))
 270             {
 271                 srcrow = srcdata;
 272                 dstrow = pbBuffer;
 273                 for (y=0; y<prc->Height; y++) {
 274                     srcbyte=(const BYTE*)srcrow;
 275                     dstpixel=(DWORD*)dstrow;
 276                     for (x=0; x<prc->Width; x+=2) {
 277                         BYTE srcval;
 278                         srcval=*srcbyte++;
 279                         *dstpixel++ = colors[srcval>>4];
 280                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval&0xf];
 281                     }
 282                     srcrow += srcstride;
 283                     dstrow += cbStride;
 284                 }
 285             }
 286
 287             HeapFree(GetProcessHeap(), 0, srcdata);
 288
 289             return res;
 290         }
 291         return S_OK;
 292     case format_8bppGray:
 293         if (prc)
 294         {
 295             HRESULT res;
 296             UINT x, y;
 297             BYTE *srcdata;
 298             UINT srcstride, srcdatasize;
 299             const BYTE *srcrow;
 300             const BYTE *srcbyte;
 301             BYTE *dstrow;
 302             DWORD *dstpixel;
 303
 304             srcstride = prc->Width;
 305             srcdatasize = srcstride * prc->Height;
 306
 307             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 308             if (!srcdata) return E_OUTOFMEMORY;
 309
 310             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 311
 312             if (SUCCEEDED(res))
 313             {
 314                 srcrow = srcdata;
 315                 dstrow = pbBuffer;
 316                 for (y=0; y<prc->Height; y++) {
 317                     srcbyte=(const BYTE*)srcrow;
 318                     dstpixel=(DWORD*)dstrow;
 319                     for (x=0; x<prc->Width; x++)
 320                     {
 321                         *dstpixel++ = 0xff000000|(*srcbyte<<16)|(*srcbyte<<8)|*srcbyte;
 322                         srcbyte++;
 323                     }
 324                     srcrow += srcstride;
 325                     dstrow += cbStride;
 326                 }
 327             }
 328
 329             HeapFree(GetProcessHeap(), 0, srcdata);
 330
 331             return res;
 332         }
 333         return S_OK;
 334     case format_8bppIndexed:
 335         if (prc)
 336         {
 337             HRESULT res;
 338             UINT x, y;
 339             BYTE *srcdata;
 340             UINT srcstride, srcdatasize;
 341             const BYTE *srcrow;
 342             const BYTE *srcbyte;
 343             BYTE *dstrow;
 344             DWORD *dstpixel;
 345             WICColor colors[256];
 346             IWICPalette *palette;
 347             UINT actualcolors;
 348
 349             res = PaletteImpl_Create(&palette);
 350             if (FAILED(res)) return res;
 351
 352             res = IWICBitmapSource_CopyPalette(This->source, palette);
 353             if (SUCCEEDED(res))
 354                 res = IWICPalette_GetColors(palette, 256, colors, &actualcolors);
 355
 356             IWICPalette_Release(palette);
 357
 358             if (FAILED(res)) return res;
 359
 360             srcstride = prc->Width;
 361             srcdatasize = srcstride * prc->Height;
 362
 363             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 364             if (!srcdata) return E_OUTOFMEMORY;
 365
 366             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 367
 368             if (SUCCEEDED(res))
 369             {
 370                 srcrow = srcdata;
 371                 dstrow = pbBuffer;
 372                 for (y=0; y<prc->Height; y++) {
 373                     srcbyte=(const BYTE*)srcrow;
 374                     dstpixel=(DWORD*)dstrow;
 375                     for (x=0; x<prc->Width; x++)
 376                         *dstpixel++ = colors[*srcbyte++];
 377                     srcrow += srcstride;
 378                     dstrow += cbStride;
 379                 }
 380             }
 381
 382             HeapFree(GetProcessHeap(), 0, srcdata);
 383
 384             return res;
 385         }
 386         return S_OK;
 387     case format_16bppGray:
 388         if (prc)
 389         {
 390             HRESULT res;
 391             UINT x, y;
 392             BYTE *srcdata;
 393             UINT srcstride, srcdatasize;
 394             const BYTE *srcrow;
 395             const BYTE *srcbyte;
 396             BYTE *dstrow;
 397             DWORD *dstpixel;
 398
 399             srcstride = prc->Width * 2;
 400             srcdatasize = srcstride * prc->Height;
 401
 402             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 403             if (!srcdata) return E_OUTOFMEMORY;
 404
 405             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 406
 407             if (SUCCEEDED(res))
 408             {
 409                 srcrow = srcdata;
 410                 dstrow = pbBuffer;
 411                 for (y=0; y<prc->Height; y++) {
 412                     srcbyte=(const BYTE*)srcrow;
 413                     dstpixel=(DWORD*)dstrow;
 414                     for (x=0; x<prc->Width; x++)
 415                     {
 416                         *dstpixel++ = 0xff000000|(*srcbyte<<16)|(*srcbyte<<8)|*srcbyte;
 417                         srcbyte+=2;
 418                     }
 419                     srcrow += srcstride;
 420                     dstrow += cbStride;
 421                 }
 422             }
 423
 424             HeapFree(GetProcessHeap(), 0, srcdata);
 425
 426             return res;
 427         }
 428         return S_OK;
 429     case format_16bppBGR555:
 430         if (prc)
 431         {
 432             HRESULT res;
 433             UINT x, y;
 434             BYTE *srcdata;
 435             UINT srcstride, srcdatasize;
 436             const BYTE *srcrow;
 437             const WORD *srcpixel;
 438             BYTE *dstrow;
 439             DWORD *dstpixel;
 440
 441             srcstride = 2 * prc->Width;
 442             srcdatasize = srcstride * prc->Height;
 443
 444             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 445             if (!srcdata) return E_OUTOFMEMORY;
 446
 447             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 448
 449             if (SUCCEEDED(res))
 450             {
 451                 srcrow = srcdata;
 452                 dstrow = pbBuffer;
 453                 for (y=0; y<prc->Height; y++) {
 454                     srcpixel=(const WORD*)srcrow;
 455                     dstpixel=(DWORD*)dstrow;
 456                     for (x=0; x<prc->Width; x++) {
 457                         WORD srcval;
 458                         srcval=*srcpixel++;
 459                         *dstpixel++=0xff000000 | /* constant 255 alpha */
 460                                     ((srcval << 9) & 0xf80000) | /* r */
 461                                     ((srcval << 4) & 0x070000) | /* r - 3 bits */
 462                                     ((srcval << 6) & 0x00f800) | /* g */
 463                                     ((srcval << 1) & 0x000700) | /* g - 3 bits */
 464                                     ((srcval << 3) & 0x0000f8) | /* b */
 465                                     ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 466                     }
 467                     srcrow += srcstride;
 468                     dstrow += cbStride;
 469                 }
 470             }
 471
 472             HeapFree(GetProcessHeap(), 0, srcdata);
 473
 474             return res;
 475         }
 476         return S_OK;
 477     case format_16bppBGR565:
 478         if (prc)
 479         {
 480             HRESULT res;
 481             UINT x, y;
 482             BYTE *srcdata;
 483             UINT srcstride, srcdatasize;
 484             const BYTE *srcrow;
 485             const WORD *srcpixel;
 486             BYTE *dstrow;
 487             DWORD *dstpixel;
 488
 489             srcstride = 2 * prc->Width;
 490             srcdatasize = srcstride * prc->Height;
 491
 492             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 493             if (!srcdata) return E_OUTOFMEMORY;
 494
 495             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 496
 497             if (SUCCEEDED(res))
 498             {
 499                 srcrow = srcdata;
 500                 dstrow = pbBuffer;
 501                 for (y=0; y<prc->Height; y++) {
 502                     srcpixel=(const WORD*)srcrow;
 503                     dstpixel=(DWORD*)dstrow;
 504                     for (x=0; x<prc->Width; x++) {
 505                         WORD srcval;
 506                         srcval=*srcpixel++;
 507                         *dstpixel++=0xff000000 | /* constant 255 alpha */
 508                                     ((srcval << 8) & 0xf80000) | /* r */
 509                                     ((srcval << 3) & 0x070000) | /* r - 3 bits */
 510                                     ((srcval << 5) & 0x00fc00) | /* g */
 511                                     ((srcval >> 1) & 0x000300) | /* g - 2 bits */
 512                                     ((srcval << 3) & 0x0000f8) | /* b */
 513                                     ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 514                     }
 515                     srcrow += srcstride;
 516                     dstrow += cbStride;
 517                 }
 518             }
 519
 520             HeapFree(GetProcessHeap(), 0, srcdata);
 521
 522             return res;
 523         }
 524         return S_OK;
 525     case format_24bppBGR:
 526         if (prc)
 527         {
 528             HRESULT res;
 529             UINT x, y;
 530             BYTE *srcdata;
 531             UINT srcstride, srcdatasize;
 532             const BYTE *srcrow;
 533             const BYTE *srcpixel;
 534             BYTE *dstrow;
 535             BYTE *dstpixel;
 536
 537             srcstride = 3 * prc->Width;
 538             srcdatasize = srcstride * prc->Height;
 539
 540             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 541             if (!srcdata) return E_OUTOFMEMORY;
 542
 543             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 544
 545             if (SUCCEEDED(res))
 546             {
 547                 srcrow = srcdata;
 548                 dstrow = pbBuffer;
 549                 for (y=0; y<prc->Height; y++) {
 550                     srcpixel=srcrow;
 551                     dstpixel=dstrow;
 552                     for (x=0; x<prc->Width; x++) {
 553                         *dstpixel++=*srcpixel++; /* blue */
 554                         *dstpixel++=*srcpixel++; /* green */
 555                         *dstpixel++=*srcpixel++; /* red */
 556                         *dstpixel++=255; /* alpha */
 557                     }
 558                     srcrow += srcstride;
 559                     dstrow += cbStride;
 560                 }
 561             }
 562
 563             HeapFree(GetProcessHeap(), 0, srcdata);
 564
 565             return res;
 566         }
 567         return S_OK;
 568     case format_32bppBGR:
 569         if (prc)
 570         {
 571             HRESULT res;
 572             UINT x, y;
 573
 574             res = IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 575             if (FAILED(res)) return res;
 576
 577             /* set all alpha values to 255 */
 578             for (y=0; y<prc->Height; y++)
 579                 for (x=0; x<prc->Width; x++)
 580                     pbBuffer[cbStride*y+4*x+3] = 0xff;
 581         }
 582         return S_OK;
 583     case format_32bppBGRA:
 584         if (prc)
 585             return IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 586         return S_OK;
 587     case format_48bppRGB:
 588         if (prc)
 589         {
 590             HRESULT res;
 591             UINT x, y;
 592             BYTE *srcdata;
 593             UINT srcstride, srcdatasize;
 594             const BYTE *srcrow;
 595             const BYTE *srcpixel;
 596             BYTE *dstrow;
 597             DWORD *dstpixel;
 598
 599             srcstride = 6 * prc->Width;
 600             srcdatasize = srcstride * prc->Height;
 601
 602             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 603             if (!srcdata) return E_OUTOFMEMORY;
 604
 605             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 606
 607             if (SUCCEEDED(res))
 608             {
 609                 srcrow = srcdata;
 610                 dstrow = pbBuffer;
 611                 for (y=0; y<prc->Height; y++) {
 612                     srcpixel=srcrow;
 613                     dstpixel=(DWORD*)dstrow;
 614                     for (x=0; x<prc->Width; x++) {
 615                         BYTE red, green, blue;
 616                         red = *srcpixel++; srcpixel++;
 617                         green = *srcpixel++; srcpixel++;
 618                         blue = *srcpixel++; srcpixel++;
 619                         *dstpixel++=0xff000000|red<<16|green<<8|blue;
 620                     }
 621                     srcrow += srcstride;
 622                     dstrow += cbStride;
 623                 }
 624             }
 625
 626             HeapFree(GetProcessHeap(), 0, srcdata);
 627
 628             return res;
 629         }
 630         return S_OK;
 631     case format_64bppRGBA:
 632         if (prc)
 633         {
 634             HRESULT res;
 635             UINT x, y;
 636             BYTE *srcdata;
 637             UINT srcstride, srcdatasize;
 638             const BYTE *srcrow;
 639             const BYTE *srcpixel;
 640             BYTE *dstrow;
 641             DWORD *dstpixel;
 642
 643             srcstride = 8 * prc->Width;
 644             srcdatasize = srcstride * prc->Height;
 645
 646             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 647             if (!srcdata) return E_OUTOFMEMORY;
 648
 649             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 650
 651             if (SUCCEEDED(res))
 652             {
 653                 srcrow = srcdata;
 654                 dstrow = pbBuffer;
 655                 for (y=0; y<prc->Height; y++) {
 656                     srcpixel=srcrow;
 657                     dstpixel=(DWORD*)dstrow;
 658                     for (x=0; x<prc->Width; x++) {
 659                         BYTE red, green, blue, alpha;
 660                         red = *srcpixel++; srcpixel++;
 661                         green = *srcpixel++; srcpixel++;
 662                         blue = *srcpixel++; srcpixel++;
 663                         alpha = *srcpixel++; srcpixel++;
 664                         *dstpixel++=alpha<<24|red<<16|green<<8|blue;
 665                     }
 666                     srcrow += srcstride;
 667                     dstrow += cbStride;
 668                 }
 669             }
 670
 671             HeapFree(GetProcessHeap(), 0, srcdata);
 672
 673             return res;
 674         }
 675         return S_OK;
 676     default:
 677         return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 678     }
 679 }
 680
 681 static HRESULT copypixels_to_32bppBGR(struct FormatConverter *This, const WICRect *prc,
 682     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format)
 683 {
 684     switch (source_format)
 685     {
 686     case format_32bppBGR:
 687     case format_32bppBGRA:
 688         if (prc)
 689             return IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 690         return S_OK;
 691     default:
 692         return copypixels_to_32bppBGRA(This, prc, cbStride, cbBufferSize, pbBuffer, source_format);
 693     }
 694 }
 695
 696 static const struct pixelformatinfo supported_formats[] = {
 697     {format_1bppIndexed, &GUID_WICPixelFormat1bppIndexed, NULL},
 698     {format_2bppIndexed, &GUID_WICPixelFormat2bppIndexed, NULL},
 699     {format_4bppIndexed, &GUID_WICPixelFormat4bppIndexed, NULL},
 700     {format_8bppIndexed, &GUID_WICPixelFormat8bppIndexed, NULL},
 701     {format_BlackWhite, &GUID_WICPixelFormatBlackWhite, NULL},
 702     {format_2bppGray, &GUID_WICPixelFormat2bppGray, NULL},
 703     {format_4bppGray, &GUID_WICPixelFormat4bppGray, NULL},
 704     {format_8bppGray, &GUID_WICPixelFormat8bppGray, NULL},
 705     {format_16bppGray, &GUID_WICPixelFormat16bppGray, NULL},
 706     {format_16bppBGR555, &GUID_WICPixelFormat16bppBGR555, NULL},
 707     {format_16bppBGR565, &GUID_WICPixelFormat16bppBGR565, NULL},
 708     {format_24bppBGR, &GUID_WICPixelFormat24bppBGR, NULL},
 709     {format_32bppBGR, &GUID_WICPixelFormat32bppBGR, copypixels_to_32bppBGR},
 710     {format_32bppBGRA, &GUID_WICPixelFormat32bppBGRA, copypixels_to_32bppBGRA},
 711     {format_48bppRGB, &GUID_WICPixelFormat48bppRGB, NULL},
 712     {format_64bppRGBA, &GUID_WICPixelFormat64bppRGBA, NULL},
 713     {0}
 714 };
 715
 716 static const struct pixelformatinfo *get_formatinfo(const WICPixelFormatGUID *format)
 717 {
 718     UINT i;
 719
 720     for (i=0; supported_formats[i].guid; i++)
 721         if (IsEqualGUID(supported_formats[i].guid, format)) return &supported_formats[i];
 722
 723     return NULL;
 724 }
 725
 726 static HRESULT WINAPI FormatConverter_QueryInterface(IWICFormatConverter *iface, REFIID iid,
 727     void **ppv)
 728 {
 729     FormatConverter *This = (FormatConverter*)iface;
 730     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 731
 732     if (!ppv) return E_INVALIDARG;
 733
 734     if (IsEqualIID(&IID_IUnknown, iid) ||
 735         IsEqualIID(&IID_IWICBitmapSource, iid) ||
 736         IsEqualIID(&IID_IWICFormatConverter, iid))
 737     {
 738         *ppv = This;
 739     }
 740     else
 741     {
 742         *ppv = NULL;
 743         return E_NOINTERFACE;
 744     }
 745
 746     IUnknown_AddRef((IUnknown*)*ppv);
 747     return S_OK;
 748 }
 749
 750 static ULONG WINAPI FormatConverter_AddRef(IWICFormatConverter *iface)
 751 {
 752     FormatConverter *This = (FormatConverter*)iface;
 753     ULONG ref = InterlockedIncrement(&This->ref);
 754
 755     TRACE("(%p) refcount=%u\n", iface, ref);
 756
 757     return ref;
 758 }
 759
 760 static ULONG WINAPI FormatConverter_Release(IWICFormatConverter *iface)
 761 {
 762     FormatConverter *This = (FormatConverter*)iface;
 763     ULONG ref = InterlockedDecrement(&This->ref);
 764
 765     TRACE("(%p) refcount=%u\n", iface, ref);
 766
 767     if (ref == 0)
 768     {
 769         This->lock.DebugInfo->Spare[0] = 0;
 770         DeleteCriticalSection(&This->lock);
 771         if (This->source) IWICBitmapSource_Release(This->source);
 772         HeapFree(GetProcessHeap(), 0, This);
 773     }
 774
 775     return ref;
 776 }
 777
 778 static HRESULT WINAPI FormatConverter_GetSize(IWICFormatConverter *iface,
 779     UINT *puiWidth, UINT *puiHeight)
 780 {
 781     FormatConverter *This = (FormatConverter*)iface;
 782
 783     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 784
 785     if (This->source)
 786         return IWICBitmapSource_GetSize(This->source, puiWidth, puiHeight);
 787     else
 788         return WINCODEC_ERR_NOTINITIALIZED;
 789 }
 790
 791 static HRESULT WINAPI FormatConverter_GetPixelFormat(IWICFormatConverter *iface,
 792     WICPixelFormatGUID *pPixelFormat)
 793 {
 794     FormatConverter *This = (FormatConverter*)iface;
 795
 796     TRACE("(%p,%p): stub\n", iface, pPixelFormat);
 797
 798     if (This->source)
 799         memcpy(pPixelFormat, This->dst_format->guid, sizeof(GUID));
 800     else
 801         return WINCODEC_ERR_NOTINITIALIZED;
 802
 803     return S_OK;
 804 }
 805
 806 static HRESULT WINAPI FormatConverter_GetResolution(IWICFormatConverter *iface,
 807     double *pDpiX, double *pDpiY)
 808 {
 809     FormatConverter *This = (FormatConverter*)iface;
 810
 811     TRACE("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 812
 813     if (This->source)
 814         return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
 815     else
 816         return WINCODEC_ERR_NOTINITIALIZED;
 817 }
 818
 819 static HRESULT WINAPI FormatConverter_CopyPalette(IWICFormatConverter *iface,
 820     IWICPalette *pIPalette)
 821 {
 822     FIXME("(%p,%p): stub\n", iface, pIPalette);
 823     return E_NOTIMPL;
 824 }
 825
 826 static HRESULT WINAPI FormatConverter_CopyPixels(IWICFormatConverter *iface,
 827     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 828 {
 829     FormatConverter *This = (FormatConverter*)iface;
 830     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 831
 832     if (This->source)
 833         return This->dst_format->copy_function(This, prc, cbStride, cbBufferSize,
 834             pbBuffer, This->src_format->format);
 835     else
 836         return WINCODEC_ERR_NOTINITIALIZED;
 837 }
 838
 839 static HRESULT WINAPI FormatConverter_Initialize(IWICFormatConverter *iface,
 840     IWICBitmapSource *pISource, REFWICPixelFormatGUID dstFormat, WICBitmapDitherType dither,
 841     IWICPalette *pIPalette, double alphaThresholdPercent, WICBitmapPaletteType paletteTranslate)
 842 {
 843     FormatConverter *This = (FormatConverter*)iface;
 844     const struct pixelformatinfo *srcinfo, *dstinfo;
 845     static INT fixme=0;
 846     GUID srcFormat;
 847     HRESULT res=S_OK;
 848
 849     TRACE("(%p,%p,%s,%u,%p,%0.1f,%u)\n", iface, pISource, debugstr_guid(dstFormat),
 850         dither, pIPalette, alphaThresholdPercent, paletteTranslate);
 851
 852     if (pIPalette && !fixme++) FIXME("ignoring palette\n");
 853
 854     EnterCriticalSection(&This->lock);
 855
 856     if (This->source)
 857     {
 858         res = WINCODEC_ERR_WRONGSTATE;
 859         goto end;
 860     }
 861
 862     res = IWICBitmapSource_GetPixelFormat(pISource, &srcFormat);
 863     if (FAILED(res)) goto end;
 864
 865     srcinfo = get_formatinfo(&srcFormat);
 866     if (!srcinfo)
 867     {
 868         res = WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 869         goto end;
 870     }
 871
 872     dstinfo = get_formatinfo(dstFormat);
 873     if (!dstinfo)
 874     {
 875         res = WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 876         goto end;
 877     }
 878
 879     if (dstinfo->copy_function)
 880     {
 881         IWICBitmapSource_AddRef(pISource);
 882         This->src_format = srcinfo;
 883         This->dst_format = dstinfo;
 884         This->dither = dither;
 885         This->alpha_threshold = alphaThresholdPercent;
 886         This->palette_type = paletteTranslate;
 887         This->source = pISource;
 888     }
 889     else
 890         res = WINCODEC_ERR_UNSUPPORTEDOPERATION;
 891
 892 end:
 893
 894     LeaveCriticalSection(&This->lock);
 895
 896     return res;
 897 }
 898
 899 static HRESULT WINAPI FormatConverter_CanConvert(IWICFormatConverter *iface,
 900     REFWICPixelFormatGUID srcPixelFormat, REFWICPixelFormatGUID dstPixelFormat,
 901     BOOL *pfCanConvert)
 902 {
 903     FormatConverter *This = (FormatConverter*)iface;
 904     const struct pixelformatinfo *srcinfo, *dstinfo;
 905
 906     TRACE("(%p,%s,%s,%p)\n", iface, debugstr_guid(srcPixelFormat),
 907         debugstr_guid(dstPixelFormat), pfCanConvert);
 908
 909     srcinfo = get_formatinfo(srcPixelFormat);
 910     if (!srcinfo) return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 911
 912     dstinfo = get_formatinfo(dstPixelFormat);
 913     if (!dstinfo) return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 914
 915     if (dstinfo->copy_function &&
 916         SUCCEEDED(dstinfo->copy_function(This, NULL, 0, 0, NULL, dstinfo->format)))
 917         *pfCanConvert = TRUE;
 918     else
 919         *pfCanConvert = FALSE;
 920
 921     return S_OK;
 922 }
 923
 924 static const IWICFormatConverterVtbl FormatConverter_Vtbl = {
 925     FormatConverter_QueryInterface,
 926     FormatConverter_AddRef,
 927     FormatConverter_Release,
 928     FormatConverter_GetSize,
 929     FormatConverter_GetPixelFormat,
 930     FormatConverter_GetResolution,
 931     FormatConverter_CopyPalette,
 932     FormatConverter_CopyPixels,
 933     FormatConverter_Initialize,
 934     FormatConverter_CanConvert
 935 };
 936
 937 HRESULT FormatConverter_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 938 {
 939     FormatConverter *This;
 940     HRESULT ret;
 941
 942     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 943
 944     *ppv = NULL;
 945
 946     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 947
 948     This = HeapAlloc(GetProcessHeap(), 0, sizeof(FormatConverter));
 949     if (!This) return E_OUTOFMEMORY;
 950
 951     This->lpVtbl = &FormatConverter_Vtbl;
 952     This->ref = 1;
 953     This->source = NULL;
 954     InitializeCriticalSection(&This->lock);
 955     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FormatConverter.lock");
 956
 957     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 958     IUnknown_Release((IUnknown*)This);
 959
 960     return ret;
 961 }