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     format_32bppCMYK,
  56 };
  57
  58 typedef HRESULT (*copyfunc)(struct FormatConverter *This, const WICRect *prc,
  59     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format);
  60
  61 struct pixelformatinfo {
  62     enum pixelformat format;
  63     const WICPixelFormatGUID *guid;
  64     copyfunc copy_function;
  65 };
  66
  67 typedef struct FormatConverter {
  68     const IWICFormatConverterVtbl *lpVtbl;
  69     LONG ref;
  70     IWICBitmapSource *source;
  71     const struct pixelformatinfo *dst_format, *src_format;
  72     WICBitmapDitherType dither;
  73     double alpha_threshold;
  74     WICBitmapPaletteType palette_type;
  75     CRITICAL_SECTION lock; /* must be held when initialized */
  76 } FormatConverter;
  77
  78 static void make_grayscale_palette(WICColor *colors, UINT num_colors)
  79 {
  80     int i, v;
  81     for (i=0; i<num_colors; i++)
  82     {
  83         v = i * 255 / (num_colors-1);
  84         colors[i] = 0xff000000 | v<<16 | v<<8 | v;
  85     }
  86 }
  87
  88 static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRect *prc,
  89     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format)
  90 {
  91     switch (source_format)
  92     {
  93     case format_1bppIndexed:
  94     case format_BlackWhite:
  95         if (prc)
  96         {
  97             HRESULT res;
  98             UINT x, y;
  99             BYTE *srcdata;
 100             UINT srcstride, srcdatasize;
 101             const BYTE *srcrow;
 102             const BYTE *srcbyte;
 103             BYTE *dstrow;
 104             DWORD *dstpixel;
 105             WICColor colors[2];
 106             IWICPalette *palette;
 107             UINT actualcolors;
 108
 109             if (source_format == format_1bppIndexed)
 110             {
 111                 res = PaletteImpl_Create(&palette);
 112                 if (FAILED(res)) return res;
 113
 114                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 115                 if (SUCCEEDED(res))
 116                     res = IWICPalette_GetColors(palette, 2, colors, &actualcolors);
 117
 118                 IWICPalette_Release(palette);
 119
 120                 if (FAILED(res)) return res;
 121             }
 122             else
 123             {
 124                 colors[0] = 0xff000000;
 125                 colors[1] = 0xffffffff;
 126             }
 127
 128             srcstride = (prc->Width+7)/8;
 129             srcdatasize = srcstride * prc->Height;
 130
 131             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 132             if (!srcdata) return E_OUTOFMEMORY;
 133
 134             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 135
 136             if (SUCCEEDED(res))
 137             {
 138                 srcrow = srcdata;
 139                 dstrow = pbBuffer;
 140                 for (y=0; y<prc->Height; y++) {
 141                     srcbyte=(const BYTE*)srcrow;
 142                     dstpixel=(DWORD*)dstrow;
 143                     for (x=0; x<prc->Width; x+=8) {
 144                         BYTE srcval;
 145                         srcval=*srcbyte++;
 146                         *dstpixel++ = colors[srcval>>7&1];
 147                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval>>6&1];
 148                         if (x+2 < prc->Width) *dstpixel++ = colors[srcval>>5&1];
 149                         if (x+3 < prc->Width) *dstpixel++ = colors[srcval>>4&1];
 150                         if (x+4 < prc->Width) *dstpixel++ = colors[srcval>>3&1];
 151                         if (x+5 < prc->Width) *dstpixel++ = colors[srcval>>2&1];
 152                         if (x+6 < prc->Width) *dstpixel++ = colors[srcval>>1&1];
 153                         if (x+7 < prc->Width) *dstpixel++ = colors[srcval&1];
 154                     }
 155                     srcrow += srcstride;
 156                     dstrow += cbStride;
 157                 }
 158             }
 159
 160             HeapFree(GetProcessHeap(), 0, srcdata);
 161
 162             return res;
 163         }
 164         return S_OK;
 165     case format_2bppIndexed:
 166     case format_2bppGray:
 167         if (prc)
 168         {
 169             HRESULT res;
 170             UINT x, y;
 171             BYTE *srcdata;
 172             UINT srcstride, srcdatasize;
 173             const BYTE *srcrow;
 174             const BYTE *srcbyte;
 175             BYTE *dstrow;
 176             DWORD *dstpixel;
 177             WICColor colors[4];
 178             IWICPalette *palette;
 179             UINT actualcolors;
 180
 181             if (source_format == format_2bppIndexed)
 182             {
 183                 res = PaletteImpl_Create(&palette);
 184                 if (FAILED(res)) return res;
 185
 186                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 187                 if (SUCCEEDED(res))
 188                     res = IWICPalette_GetColors(palette, 4, colors, &actualcolors);
 189
 190                 IWICPalette_Release(palette);
 191
 192                 if (FAILED(res)) return res;
 193             }
 194             else
 195                 make_grayscale_palette(colors, 4);
 196
 197             srcstride = (prc->Width+3)/4;
 198             srcdatasize = srcstride * prc->Height;
 199
 200             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 201             if (!srcdata) return E_OUTOFMEMORY;
 202
 203             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 204
 205             if (SUCCEEDED(res))
 206             {
 207                 srcrow = srcdata;
 208                 dstrow = pbBuffer;
 209                 for (y=0; y<prc->Height; y++) {
 210                     srcbyte=(const BYTE*)srcrow;
 211                     dstpixel=(DWORD*)dstrow;
 212                     for (x=0; x<prc->Width; x+=4) {
 213                         BYTE srcval;
 214                         srcval=*srcbyte++;
 215                         *dstpixel++ = colors[srcval>>6];
 216                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval>>4&0x3];
 217                         if (x+2 < prc->Width) *dstpixel++ = colors[srcval>>2&0x3];
 218                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval&0x3];
 219                     }
 220                     srcrow += srcstride;
 221                     dstrow += cbStride;
 222                 }
 223             }
 224
 225             HeapFree(GetProcessHeap(), 0, srcdata);
 226
 227             return res;
 228         }
 229         return S_OK;
 230     case format_4bppIndexed:
 231     case format_4bppGray:
 232         if (prc)
 233         {
 234             HRESULT res;
 235             UINT x, y;
 236             BYTE *srcdata;
 237             UINT srcstride, srcdatasize;
 238             const BYTE *srcrow;
 239             const BYTE *srcbyte;
 240             BYTE *dstrow;
 241             DWORD *dstpixel;
 242             WICColor colors[16];
 243             IWICPalette *palette;
 244             UINT actualcolors;
 245
 246             if (source_format == format_4bppIndexed)
 247             {
 248                 res = PaletteImpl_Create(&palette);
 249                 if (FAILED(res)) return res;
 250
 251                 res = IWICBitmapSource_CopyPalette(This->source, palette);
 252                 if (SUCCEEDED(res))
 253                     res = IWICPalette_GetColors(palette, 16, colors, &actualcolors);
 254
 255                 IWICPalette_Release(palette);
 256
 257                 if (FAILED(res)) return res;
 258             }
 259             else
 260                 make_grayscale_palette(colors, 16);
 261
 262             srcstride = (prc->Width+1)/2;
 263             srcdatasize = srcstride * prc->Height;
 264
 265             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 266             if (!srcdata) return E_OUTOFMEMORY;
 267
 268             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 269
 270             if (SUCCEEDED(res))
 271             {
 272                 srcrow = srcdata;
 273                 dstrow = pbBuffer;
 274                 for (y=0; y<prc->Height; y++) {
 275                     srcbyte=(const BYTE*)srcrow;
 276                     dstpixel=(DWORD*)dstrow;
 277                     for (x=0; x<prc->Width; x+=2) {
 278                         BYTE srcval;
 279                         srcval=*srcbyte++;
 280                         *dstpixel++ = colors[srcval>>4];
 281                         if (x+1 < prc->Width) *dstpixel++ = colors[srcval&0xf];
 282                     }
 283                     srcrow += srcstride;
 284                     dstrow += cbStride;
 285                 }
 286             }
 287
 288             HeapFree(GetProcessHeap(), 0, srcdata);
 289
 290             return res;
 291         }
 292         return S_OK;
 293     case format_8bppGray:
 294         if (prc)
 295         {
 296             HRESULT res;
 297             UINT x, y;
 298             BYTE *srcdata;
 299             UINT srcstride, srcdatasize;
 300             const BYTE *srcrow;
 301             const BYTE *srcbyte;
 302             BYTE *dstrow;
 303             DWORD *dstpixel;
 304
 305             srcstride = prc->Width;
 306             srcdatasize = srcstride * prc->Height;
 307
 308             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 309             if (!srcdata) return E_OUTOFMEMORY;
 310
 311             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 312
 313             if (SUCCEEDED(res))
 314             {
 315                 srcrow = srcdata;
 316                 dstrow = pbBuffer;
 317                 for (y=0; y<prc->Height; y++) {
 318                     srcbyte=(const BYTE*)srcrow;
 319                     dstpixel=(DWORD*)dstrow;
 320                     for (x=0; x<prc->Width; x++)
 321                     {
 322                         *dstpixel++ = 0xff000000|(*srcbyte<<16)|(*srcbyte<<8)|*srcbyte;
 323                         srcbyte++;
 324                     }
 325                     srcrow += srcstride;
 326                     dstrow += cbStride;
 327                 }
 328             }
 329
 330             HeapFree(GetProcessHeap(), 0, srcdata);
 331
 332             return res;
 333         }
 334         return S_OK;
 335     case format_8bppIndexed:
 336         if (prc)
 337         {
 338             HRESULT res;
 339             UINT x, y;
 340             BYTE *srcdata;
 341             UINT srcstride, srcdatasize;
 342             const BYTE *srcrow;
 343             const BYTE *srcbyte;
 344             BYTE *dstrow;
 345             DWORD *dstpixel;
 346             WICColor colors[256];
 347             IWICPalette *palette;
 348             UINT actualcolors;
 349
 350             res = PaletteImpl_Create(&palette);
 351             if (FAILED(res)) return res;
 352
 353             res = IWICBitmapSource_CopyPalette(This->source, palette);
 354             if (SUCCEEDED(res))
 355                 res = IWICPalette_GetColors(palette, 256, colors, &actualcolors);
 356
 357             IWICPalette_Release(palette);
 358
 359             if (FAILED(res)) return res;
 360
 361             srcstride = prc->Width;
 362             srcdatasize = srcstride * prc->Height;
 363
 364             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 365             if (!srcdata) return E_OUTOFMEMORY;
 366
 367             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 368
 369             if (SUCCEEDED(res))
 370             {
 371                 srcrow = srcdata;
 372                 dstrow = pbBuffer;
 373                 for (y=0; y<prc->Height; y++) {
 374                     srcbyte=(const BYTE*)srcrow;
 375                     dstpixel=(DWORD*)dstrow;
 376                     for (x=0; x<prc->Width; x++)
 377                         *dstpixel++ = colors[*srcbyte++];
 378                     srcrow += srcstride;
 379                     dstrow += cbStride;
 380                 }
 381             }
 382
 383             HeapFree(GetProcessHeap(), 0, srcdata);
 384
 385             return res;
 386         }
 387         return S_OK;
 388     case format_16bppGray:
 389         if (prc)
 390         {
 391             HRESULT res;
 392             UINT x, y;
 393             BYTE *srcdata;
 394             UINT srcstride, srcdatasize;
 395             const BYTE *srcrow;
 396             const BYTE *srcbyte;
 397             BYTE *dstrow;
 398             DWORD *dstpixel;
 399
 400             srcstride = prc->Width * 2;
 401             srcdatasize = srcstride * prc->Height;
 402
 403             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 404             if (!srcdata) return E_OUTOFMEMORY;
 405
 406             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 407
 408             if (SUCCEEDED(res))
 409             {
 410                 srcrow = srcdata;
 411                 dstrow = pbBuffer;
 412                 for (y=0; y<prc->Height; y++) {
 413                     srcbyte=(const BYTE*)srcrow;
 414                     dstpixel=(DWORD*)dstrow;
 415                     for (x=0; x<prc->Width; x++)
 416                     {
 417                         *dstpixel++ = 0xff000000|(*srcbyte<<16)|(*srcbyte<<8)|*srcbyte;
 418                         srcbyte+=2;
 419                     }
 420                     srcrow += srcstride;
 421                     dstrow += cbStride;
 422                 }
 423             }
 424
 425             HeapFree(GetProcessHeap(), 0, srcdata);
 426
 427             return res;
 428         }
 429         return S_OK;
 430     case format_16bppBGR555:
 431         if (prc)
 432         {
 433             HRESULT res;
 434             UINT x, y;
 435             BYTE *srcdata;
 436             UINT srcstride, srcdatasize;
 437             const BYTE *srcrow;
 438             const WORD *srcpixel;
 439             BYTE *dstrow;
 440             DWORD *dstpixel;
 441
 442             srcstride = 2 * prc->Width;
 443             srcdatasize = srcstride * prc->Height;
 444
 445             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 446             if (!srcdata) return E_OUTOFMEMORY;
 447
 448             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 449
 450             if (SUCCEEDED(res))
 451             {
 452                 srcrow = srcdata;
 453                 dstrow = pbBuffer;
 454                 for (y=0; y<prc->Height; y++) {
 455                     srcpixel=(const WORD*)srcrow;
 456                     dstpixel=(DWORD*)dstrow;
 457                     for (x=0; x<prc->Width; x++) {
 458                         WORD srcval;
 459                         srcval=*srcpixel++;
 460                         *dstpixel++=0xff000000 | /* constant 255 alpha */
 461                                     ((srcval << 9) & 0xf80000) | /* r */
 462                                     ((srcval << 4) & 0x070000) | /* r - 3 bits */
 463                                     ((srcval << 6) & 0x00f800) | /* g */
 464                                     ((srcval << 1) & 0x000700) | /* g - 3 bits */
 465                                     ((srcval << 3) & 0x0000f8) | /* b */
 466                                     ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 467                     }
 468                     srcrow += srcstride;
 469                     dstrow += cbStride;
 470                 }
 471             }
 472
 473             HeapFree(GetProcessHeap(), 0, srcdata);
 474
 475             return res;
 476         }
 477         return S_OK;
 478     case format_16bppBGR565:
 479         if (prc)
 480         {
 481             HRESULT res;
 482             UINT x, y;
 483             BYTE *srcdata;
 484             UINT srcstride, srcdatasize;
 485             const BYTE *srcrow;
 486             const WORD *srcpixel;
 487             BYTE *dstrow;
 488             DWORD *dstpixel;
 489
 490             srcstride = 2 * prc->Width;
 491             srcdatasize = srcstride * prc->Height;
 492
 493             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 494             if (!srcdata) return E_OUTOFMEMORY;
 495
 496             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 497
 498             if (SUCCEEDED(res))
 499             {
 500                 srcrow = srcdata;
 501                 dstrow = pbBuffer;
 502                 for (y=0; y<prc->Height; y++) {
 503                     srcpixel=(const WORD*)srcrow;
 504                     dstpixel=(DWORD*)dstrow;
 505                     for (x=0; x<prc->Width; x++) {
 506                         WORD srcval;
 507                         srcval=*srcpixel++;
 508                         *dstpixel++=0xff000000 | /* constant 255 alpha */
 509                                     ((srcval << 8) & 0xf80000) | /* r */
 510                                     ((srcval << 3) & 0x070000) | /* r - 3 bits */
 511                                     ((srcval << 5) & 0x00fc00) | /* g */
 512                                     ((srcval >> 1) & 0x000300) | /* g - 2 bits */
 513                                     ((srcval << 3) & 0x0000f8) | /* b */
 514                                     ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 515                     }
 516                     srcrow += srcstride;
 517                     dstrow += cbStride;
 518                 }
 519             }
 520
 521             HeapFree(GetProcessHeap(), 0, srcdata);
 522
 523             return res;
 524         }
 525         return S_OK;
 526     case format_24bppBGR:
 527         if (prc)
 528         {
 529             HRESULT res;
 530             UINT x, y;
 531             BYTE *srcdata;
 532             UINT srcstride, srcdatasize;
 533             const BYTE *srcrow;
 534             const BYTE *srcpixel;
 535             BYTE *dstrow;
 536             BYTE *dstpixel;
 537
 538             srcstride = 3 * prc->Width;
 539             srcdatasize = srcstride * prc->Height;
 540
 541             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 542             if (!srcdata) return E_OUTOFMEMORY;
 543
 544             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 545
 546             if (SUCCEEDED(res))
 547             {
 548                 srcrow = srcdata;
 549                 dstrow = pbBuffer;
 550                 for (y=0; y<prc->Height; y++) {
 551                     srcpixel=srcrow;
 552                     dstpixel=dstrow;
 553                     for (x=0; x<prc->Width; x++) {
 554                         *dstpixel++=*srcpixel++; /* blue */
 555                         *dstpixel++=*srcpixel++; /* green */
 556                         *dstpixel++=*srcpixel++; /* red */
 557                         *dstpixel++=255; /* alpha */
 558                     }
 559                     srcrow += srcstride;
 560                     dstrow += cbStride;
 561                 }
 562             }
 563
 564             HeapFree(GetProcessHeap(), 0, srcdata);
 565
 566             return res;
 567         }
 568         return S_OK;
 569     case format_32bppBGR:
 570         if (prc)
 571         {
 572             HRESULT res;
 573             UINT x, y;
 574
 575             res = IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 576             if (FAILED(res)) return res;
 577
 578             /* set all alpha values to 255 */
 579             for (y=0; y<prc->Height; y++)
 580                 for (x=0; x<prc->Width; x++)
 581                     pbBuffer[cbStride*y+4*x+3] = 0xff;
 582         }
 583         return S_OK;
 584     case format_32bppBGRA:
 585         if (prc)
 586             return IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 587         return S_OK;
 588     case format_48bppRGB:
 589         if (prc)
 590         {
 591             HRESULT res;
 592             UINT x, y;
 593             BYTE *srcdata;
 594             UINT srcstride, srcdatasize;
 595             const BYTE *srcrow;
 596             const BYTE *srcpixel;
 597             BYTE *dstrow;
 598             DWORD *dstpixel;
 599
 600             srcstride = 6 * prc->Width;
 601             srcdatasize = srcstride * prc->Height;
 602
 603             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 604             if (!srcdata) return E_OUTOFMEMORY;
 605
 606             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 607
 608             if (SUCCEEDED(res))
 609             {
 610                 srcrow = srcdata;
 611                 dstrow = pbBuffer;
 612                 for (y=0; y<prc->Height; y++) {
 613                     srcpixel=srcrow;
 614                     dstpixel=(DWORD*)dstrow;
 615                     for (x=0; x<prc->Width; x++) {
 616                         BYTE red, green, blue;
 617                         red = *srcpixel++; srcpixel++;
 618                         green = *srcpixel++; srcpixel++;
 619                         blue = *srcpixel++; srcpixel++;
 620                         *dstpixel++=0xff000000|red<<16|green<<8|blue;
 621                     }
 622                     srcrow += srcstride;
 623                     dstrow += cbStride;
 624                 }
 625             }
 626
 627             HeapFree(GetProcessHeap(), 0, srcdata);
 628
 629             return res;
 630         }
 631         return S_OK;
 632     case format_64bppRGBA:
 633         if (prc)
 634         {
 635             HRESULT res;
 636             UINT x, y;
 637             BYTE *srcdata;
 638             UINT srcstride, srcdatasize;
 639             const BYTE *srcrow;
 640             const BYTE *srcpixel;
 641             BYTE *dstrow;
 642             DWORD *dstpixel;
 643
 644             srcstride = 8 * prc->Width;
 645             srcdatasize = srcstride * prc->Height;
 646
 647             srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
 648             if (!srcdata) return E_OUTOFMEMORY;
 649
 650             res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
 651
 652             if (SUCCEEDED(res))
 653             {
 654                 srcrow = srcdata;
 655                 dstrow = pbBuffer;
 656                 for (y=0; y<prc->Height; y++) {
 657                     srcpixel=srcrow;
 658                     dstpixel=(DWORD*)dstrow;
 659                     for (x=0; x<prc->Width; x++) {
 660                         BYTE red, green, blue, alpha;
 661                         red = *srcpixel++; srcpixel++;
 662                         green = *srcpixel++; srcpixel++;
 663                         blue = *srcpixel++; srcpixel++;
 664                         alpha = *srcpixel++; srcpixel++;
 665                         *dstpixel++=alpha<<24|red<<16|green<<8|blue;
 666                     }
 667                     srcrow += srcstride;
 668                     dstrow += cbStride;
 669                 }
 670             }
 671
 672             HeapFree(GetProcessHeap(), 0, srcdata);
 673
 674             return res;
 675         }
 676         return S_OK;
 677     case format_32bppCMYK:
 678         if (prc)
 679         {
 680             HRESULT res;
 681             UINT x, y;
 682
 683             res = IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 684             if (FAILED(res)) return res;
 685
 686             for (y=0; y<prc->Height; y++)
 687                 for (x=0; x<prc->Width; x++)
 688                 {
 689                     BYTE *pixel = pbBuffer+cbStride*y+4*x;
 690                     BYTE c=pixel[0], m=pixel[1], y=pixel[2], k=pixel[3];
 691                     pixel[0] = (255-y)*(255-k)/255; /* blue */
 692                     pixel[1] = (255-m)*(255-k)/255; /* green */
 693                     pixel[2] = (255-c)*(255-k)/255; /* red */
 694                     pixel[3] = 255; /* alpha */
 695                 }
 696         }
 697         return S_OK;
 698     default:
 699         return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 700     }
 701 }
 702
 703 static HRESULT copypixels_to_32bppBGR(struct FormatConverter *This, const WICRect *prc,
 704     UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format)
 705 {
 706     switch (source_format)
 707     {
 708     case format_32bppBGR:
 709     case format_32bppBGRA:
 710         if (prc)
 711             return IWICBitmapSource_CopyPixels(This->source, prc, cbStride, cbBufferSize, pbBuffer);
 712         return S_OK;
 713     default:
 714         return copypixels_to_32bppBGRA(This, prc, cbStride, cbBufferSize, pbBuffer, source_format);
 715     }
 716 }
 717
 718 static const struct pixelformatinfo supported_formats[] = {
 719     {format_1bppIndexed, &GUID_WICPixelFormat1bppIndexed, NULL},
 720     {format_2bppIndexed, &GUID_WICPixelFormat2bppIndexed, NULL},
 721     {format_4bppIndexed, &GUID_WICPixelFormat4bppIndexed, NULL},
 722     {format_8bppIndexed, &GUID_WICPixelFormat8bppIndexed, NULL},
 723     {format_BlackWhite, &GUID_WICPixelFormatBlackWhite, NULL},
 724     {format_2bppGray, &GUID_WICPixelFormat2bppGray, NULL},
 725     {format_4bppGray, &GUID_WICPixelFormat4bppGray, NULL},
 726     {format_8bppGray, &GUID_WICPixelFormat8bppGray, NULL},
 727     {format_16bppGray, &GUID_WICPixelFormat16bppGray, NULL},
 728     {format_16bppBGR555, &GUID_WICPixelFormat16bppBGR555, NULL},
 729     {format_16bppBGR565, &GUID_WICPixelFormat16bppBGR565, NULL},
 730     {format_24bppBGR, &GUID_WICPixelFormat24bppBGR, NULL},
 731     {format_32bppBGR, &GUID_WICPixelFormat32bppBGR, copypixels_to_32bppBGR},
 732     {format_32bppBGRA, &GUID_WICPixelFormat32bppBGRA, copypixels_to_32bppBGRA},
 733     {format_48bppRGB, &GUID_WICPixelFormat48bppRGB, NULL},
 734     {format_64bppRGBA, &GUID_WICPixelFormat64bppRGBA, NULL},
 735     {format_32bppCMYK, &GUID_WICPixelFormat32bppCMYK, NULL},
 736     {0}
 737 };
 738
 739 static const struct pixelformatinfo *get_formatinfo(const WICPixelFormatGUID *format)
 740 {
 741     UINT i;
 742
 743     for (i=0; supported_formats[i].guid; i++)
 744         if (IsEqualGUID(supported_formats[i].guid, format)) return &supported_formats[i];
 745
 746     return NULL;
 747 }
 748
 749 static HRESULT WINAPI FormatConverter_QueryInterface(IWICFormatConverter *iface, REFIID iid,
 750     void **ppv)
 751 {
 752     FormatConverter *This = (FormatConverter*)iface;
 753     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 754
 755     if (!ppv) return E_INVALIDARG;
 756
 757     if (IsEqualIID(&IID_IUnknown, iid) ||
 758         IsEqualIID(&IID_IWICBitmapSource, iid) ||
 759         IsEqualIID(&IID_IWICFormatConverter, iid))
 760     {
 761         *ppv = This;
 762     }
 763     else
 764     {
 765         *ppv = NULL;
 766         return E_NOINTERFACE;
 767     }
 768
 769     IUnknown_AddRef((IUnknown*)*ppv);
 770     return S_OK;
 771 }
 772
 773 static ULONG WINAPI FormatConverter_AddRef(IWICFormatConverter *iface)
 774 {
 775     FormatConverter *This = (FormatConverter*)iface;
 776     ULONG ref = InterlockedIncrement(&This->ref);
 777
 778     TRACE("(%p) refcount=%u\n", iface, ref);
 779
 780     return ref;
 781 }
 782
 783 static ULONG WINAPI FormatConverter_Release(IWICFormatConverter *iface)
 784 {
 785     FormatConverter *This = (FormatConverter*)iface;
 786     ULONG ref = InterlockedDecrement(&This->ref);
 787
 788     TRACE("(%p) refcount=%u\n", iface, ref);
 789
 790     if (ref == 0)
 791     {
 792         This->lock.DebugInfo->Spare[0] = 0;
 793         DeleteCriticalSection(&This->lock);
 794         if (This->source) IWICBitmapSource_Release(This->source);
 795         HeapFree(GetProcessHeap(), 0, This);
 796     }
 797
 798     return ref;
 799 }
 800
 801 static HRESULT WINAPI FormatConverter_GetSize(IWICFormatConverter *iface,
 802     UINT *puiWidth, UINT *puiHeight)
 803 {
 804     FormatConverter *This = (FormatConverter*)iface;
 805
 806     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 807
 808     if (This->source)
 809         return IWICBitmapSource_GetSize(This->source, puiWidth, puiHeight);
 810     else
 811         return WINCODEC_ERR_NOTINITIALIZED;
 812 }
 813
 814 static HRESULT WINAPI FormatConverter_GetPixelFormat(IWICFormatConverter *iface,
 815     WICPixelFormatGUID *pPixelFormat)
 816 {
 817     FormatConverter *This = (FormatConverter*)iface;
 818
 819     TRACE("(%p,%p): stub\n", iface, pPixelFormat);
 820
 821     if (This->source)
 822         memcpy(pPixelFormat, This->dst_format->guid, sizeof(GUID));
 823     else
 824         return WINCODEC_ERR_NOTINITIALIZED;
 825
 826     return S_OK;
 827 }
 828
 829 static HRESULT WINAPI FormatConverter_GetResolution(IWICFormatConverter *iface,
 830     double *pDpiX, double *pDpiY)
 831 {
 832     FormatConverter *This = (FormatConverter*)iface;
 833
 834     TRACE("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 835
 836     if (This->source)
 837         return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
 838     else
 839         return WINCODEC_ERR_NOTINITIALIZED;
 840 }
 841
 842 static HRESULT WINAPI FormatConverter_CopyPalette(IWICFormatConverter *iface,
 843     IWICPalette *pIPalette)
 844 {
 845     FIXME("(%p,%p): stub\n", iface, pIPalette);
 846     return E_NOTIMPL;
 847 }
 848
 849 static HRESULT WINAPI FormatConverter_CopyPixels(IWICFormatConverter *iface,
 850     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 851 {
 852     FormatConverter *This = (FormatConverter*)iface;
 853     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 854
 855     if (This->source)
 856         return This->dst_format->copy_function(This, prc, cbStride, cbBufferSize,
 857             pbBuffer, This->src_format->format);
 858     else
 859         return WINCODEC_ERR_NOTINITIALIZED;
 860 }
 861
 862 static HRESULT WINAPI FormatConverter_Initialize(IWICFormatConverter *iface,
 863     IWICBitmapSource *pISource, REFWICPixelFormatGUID dstFormat, WICBitmapDitherType dither,
 864     IWICPalette *pIPalette, double alphaThresholdPercent, WICBitmapPaletteType paletteTranslate)
 865 {
 866     FormatConverter *This = (FormatConverter*)iface;
 867     const struct pixelformatinfo *srcinfo, *dstinfo;
 868     static INT fixme=0;
 869     GUID srcFormat;
 870     HRESULT res=S_OK;
 871
 872     TRACE("(%p,%p,%s,%u,%p,%0.1f,%u)\n", iface, pISource, debugstr_guid(dstFormat),
 873         dither, pIPalette, alphaThresholdPercent, paletteTranslate);
 874
 875     if (pIPalette && !fixme++) FIXME("ignoring palette\n");
 876
 877     EnterCriticalSection(&This->lock);
 878
 879     if (This->source)
 880     {
 881         res = WINCODEC_ERR_WRONGSTATE;
 882         goto end;
 883     }
 884
 885     res = IWICBitmapSource_GetPixelFormat(pISource, &srcFormat);
 886     if (FAILED(res)) goto end;
 887
 888     srcinfo = get_formatinfo(&srcFormat);
 889     if (!srcinfo)
 890     {
 891         res = WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 892         goto end;
 893     }
 894
 895     dstinfo = get_formatinfo(dstFormat);
 896     if (!dstinfo)
 897     {
 898         res = WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 899         goto end;
 900     }
 901
 902     if (dstinfo->copy_function)
 903     {
 904         IWICBitmapSource_AddRef(pISource);
 905         This->src_format = srcinfo;
 906         This->dst_format = dstinfo;
 907         This->dither = dither;
 908         This->alpha_threshold = alphaThresholdPercent;
 909         This->palette_type = paletteTranslate;
 910         This->source = pISource;
 911     }
 912     else
 913         res = WINCODEC_ERR_UNSUPPORTEDOPERATION;
 914
 915 end:
 916
 917     LeaveCriticalSection(&This->lock);
 918
 919     return res;
 920 }
 921
 922 static HRESULT WINAPI FormatConverter_CanConvert(IWICFormatConverter *iface,
 923     REFWICPixelFormatGUID srcPixelFormat, REFWICPixelFormatGUID dstPixelFormat,
 924     BOOL *pfCanConvert)
 925 {
 926     FormatConverter *This = (FormatConverter*)iface;
 927     const struct pixelformatinfo *srcinfo, *dstinfo;
 928
 929     TRACE("(%p,%s,%s,%p)\n", iface, debugstr_guid(srcPixelFormat),
 930         debugstr_guid(dstPixelFormat), pfCanConvert);
 931
 932     srcinfo = get_formatinfo(srcPixelFormat);
 933     if (!srcinfo) return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 934
 935     dstinfo = get_formatinfo(dstPixelFormat);
 936     if (!dstinfo) return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
 937
 938     if (dstinfo->copy_function &&
 939         SUCCEEDED(dstinfo->copy_function(This, NULL, 0, 0, NULL, dstinfo->format)))
 940         *pfCanConvert = TRUE;
 941     else
 942         *pfCanConvert = FALSE;
 943
 944     return S_OK;
 945 }
 946
 947 static const IWICFormatConverterVtbl FormatConverter_Vtbl = {
 948     FormatConverter_QueryInterface,
 949     FormatConverter_AddRef,
 950     FormatConverter_Release,
 951     FormatConverter_GetSize,
 952     FormatConverter_GetPixelFormat,
 953     FormatConverter_GetResolution,
 954     FormatConverter_CopyPalette,
 955     FormatConverter_CopyPixels,
 956     FormatConverter_Initialize,
 957     FormatConverter_CanConvert
 958 };
 959
 960 HRESULT FormatConverter_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 961 {
 962     FormatConverter *This;
 963     HRESULT ret;
 964
 965     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 966
 967     *ppv = NULL;
 968
 969     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 970
 971     This = HeapAlloc(GetProcessHeap(), 0, sizeof(FormatConverter));
 972     if (!This) return E_OUTOFMEMORY;
 973
 974     This->lpVtbl = &FormatConverter_Vtbl;
 975     This->ref = 1;
 976     This->source = NULL;
 977     InitializeCriticalSection(&This->lock);
 978     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FormatConverter.lock");
 979
 980     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 981     IUnknown_Release((IUnknown*)This);
 982
 983     return ret;
 984 }