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