git.oblomov.eu Git - wine/blob - objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  */
   7
   8 #include "winbase.h"
   9 #include "bitmap.h"
  10 #include "callback.h"
  11 #include "dc.h"
  12 #include "debugtools.h"
  13 #include "monitor.h"
  14 #include "palette.h"
  15
  16 DEFAULT_DEBUG_CHANNEL(bitmap)
  17
  18 /***********************************************************************
  19  *           DIB_GetDIBWidthBytes
  20  *
  21  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  22  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  23  */
  24 int DIB_GetDIBWidthBytes( int width, int depth )
  25 {
  26     int words;
  27
  28     switch(depth)
  29     {
  30         case 1:  words = (width + 31) / 32; break;
  31         case 4:  words = (width + 7) / 8; break;
  32         case 8:  words = (width + 3) / 4; break;
  33         case 15:
  34         case 16: words = (width + 1) / 2; break;
  35         case 24: words = (width * 3 + 3)/4; break;
  36
  37         default:
  38             WARN("(%d): Unsupported depth\n", depth );
  39         /* fall through */
  40         case 32:
  41                 words = width;
  42     }
  43     return 4 * words;
  44 }
  45
  46 /***********************************************************************
  47  *           DIB_GetDIBImageBytes
  48  *
  49  * Return the number of bytes used to hold the image in a DIB bitmap.
  50  */
  51 int DIB_GetDIBImageBytes( int width, int height, int depth )
  52 {
  53     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  54 }
  55
  56
  57 /***********************************************************************
  58  *           DIB_BitmapInfoSize
  59  *
  60  * Return the size of the bitmap info structure including color table.
  61  */
  62 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  63 {
  64     int colors;
  65
  66     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  67     {
  68         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  69         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  70         return sizeof(BITMAPCOREHEADER) + colors *
  71              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  72     }
  73     else  /* assume BITMAPINFOHEADER */
  74     {
  75         colors = info->bmiHeader.biClrUsed;
  76         if (!colors && (info->bmiHeader.biBitCount <= 8))
  77             colors = 1 << info->bmiHeader.biBitCount;
  78         return sizeof(BITMAPINFOHEADER) + colors *
  79                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  80     }
  81 }
  82
  83
  84 /***********************************************************************
  85  *           DIB_GetBitmapInfo
  86  *
  87  * Get the info from a bitmap header.
  88  * Return 1 for INFOHEADER, 0 for COREHEADER, -1 for error.
  89  */
  90 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
  91                               int *height, WORD *bpp, WORD *compr )
  92 {
  93     if (header->biSize == sizeof(BITMAPINFOHEADER))
  94     {
  95         *width  = header->biWidth;
  96         *height = header->biHeight;
  97         *bpp    = header->biBitCount;
  98         *compr  = header->biCompression;
  99         return 1;
 100     }
 101     if (header->biSize == sizeof(BITMAPCOREHEADER))
 102     {
 103         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 104         *width  = core->bcWidth;
 105         *height = core->bcHeight;
 106         *bpp    = core->bcBitCount;
 107         *compr  = 0;
 108         return 0;
 109     }
 110     WARN("(%ld): wrong size for header\n", header->biSize );
 111     return -1;
 112 }
 113
 114
 115 /***********************************************************************
 116  *           StretchDIBits16   (GDI.439)
 117  */
 118 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
 119                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
 120                        INT16 heightSrc, const VOID *bits,
 121                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
 122 {
 123     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
 124                                    xSrc, ySrc, widthSrc, heightSrc, bits,
 125                                    info, wUsage, dwRop );
 126 }
 127
 128
 129 /***********************************************************************
 130  *           StretchDIBits32   (GDI32.351)
 131  */
 132 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 133                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 134                        INT heightSrc, const void *bits,
 135                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 136 {
 137     DC *dc = DC_GetDCPtr( hdc );
 138     if(!dc) return FALSE;
 139
 140     if(dc->funcs->pStretchDIBits)
 141            return dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
 142                                             heightDst, xSrc, ySrc, widthSrc,
 143                                             heightSrc, bits, info, wUsage,
 144                                             dwRop);
 145     else { /* use StretchBlt32 */
 146         HBITMAP hBitmap, hOldBitmap;
 147         HDC hdcMem;
 148
 149         hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 150                                     bits, info, wUsage );
 151         hdcMem = CreateCompatibleDC( hdc );
 152         hOldBitmap = SelectObject( hdcMem, hBitmap );
 153         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 154            left (negative biHeight) */
 155         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 156                       hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 157                       widthSrc, heightSrc, dwRop );
 158         SelectObject( hdcMem, hOldBitmap );
 159         DeleteDC( hdcMem );
 160         DeleteObject( hBitmap );
 161         return heightSrc;
 162     }
 163 }
 164
 165
 166 /***********************************************************************
 167  *           SetDIBits16    (GDI.440)
 168  */
 169 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 170                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 171                           UINT16 coloruse )
 172 {
 173     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 174 }
 175
 176
 177 /******************************************************************************
 178  * SetDIBits32 [GDI32.312]  Sets pixels in a bitmap using colors from DIB
 179  *
 180  * PARAMS
 181  *    hdc       [I] Handle to device context
 182  *    hbitmap   [I] Handle to bitmap
 183  *    startscan [I] Starting scan line
 184  *    lines     [I] Number of scan lines
 185  *    bits      [I] Array of bitmap bits
 186  *    info      [I] Address of structure with data
 187  *    coloruse  [I] Type of color indexes to use
 188  *
 189  * RETURNS
 190  *    Success: Number of scan lines copied
 191  *    Failure: 0
 192  */
 193 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 194                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 195                       UINT coloruse )
 196 {
 197     DC *dc;
 198     BITMAPOBJ *bitmap;
 199     INT result;
 200
 201     /* Check parameters */
 202     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 203     if (!dc)
 204     {
 205         dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 206         if (!dc) return 0;
 207     }
 208
 209     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 210     {
 211         GDI_HEAP_UNLOCK( hdc );
 212         return 0;
 213     }
 214
 215     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
 216                                        lines, bits, info,
 217                                        coloruse, hbitmap);
 218
 219     GDI_HEAP_UNLOCK( hdc );
 220     GDI_HEAP_UNLOCK( hbitmap );
 221
 222     return result;
 223 }
 224
 225
 226 /***********************************************************************
 227  *           SetDIBitsToDevice16    (GDI.443)
 228  */
 229 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 230                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 231                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 232                            UINT16 coloruse )
 233 {
 234     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 235                                 startscan, lines, bits, info, coloruse );
 236 }
 237
 238
 239 /***********************************************************************
 240  *           SetDIBitsToDevice32   (GDI32.313)
 241  */
 242 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 243                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 244                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 245                            UINT coloruse )
 246 {
 247     INT ret;
 248     DC *dc;
 249
 250     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 251
 252     if(dc->funcs->pSetDIBitsToDevice)
 253         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
 254                                              ySrc, startscan, lines, bits,
 255                                              info, coloruse );
 256     else {
 257         FIXME("unimplemented on hdc %08x\n", hdc);
 258         ret = 0;
 259     }
 260
 261     GDI_HEAP_UNLOCK( hdc );
 262     return ret;
 263 }
 264
 265 /***********************************************************************
 266  *           SetDIBColorTable16    (GDI.602)
 267  */
 268 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 269                                   RGBQUAD *colors )
 270 {
 271     return SetDIBColorTable( hdc, startpos, entries, colors );
 272 }
 273
 274 /***********************************************************************
 275  *           SetDIBColorTable32    (GDI32.311)
 276  */
 277 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 278                                   RGBQUAD *colors )
 279 {
 280     DC * dc;
 281     PALETTEENTRY * palEntry;
 282     PALETTEOBJ * palette;
 283     RGBQUAD *end;
 284
 285     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 286     if (!dc)
 287     {
 288         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 289         if (!dc) return 0;
 290     }
 291
 292     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
 293     {
 294         return 0;
 295     }
 296
 297     /* Transfer color info */
 298
 299     if (dc->w.bitsPerPixel <= 8) {
 300         palEntry = palette->logpalette.palPalEntry + startpos;
 301         if (startpos + entries > (1 << dc->w.bitsPerPixel))
 302             entries = (1 << dc->w.bitsPerPixel) - startpos;
 303
 304         if (startpos + entries > palette->logpalette.palNumEntries)
 305             entries = palette->logpalette.palNumEntries - startpos;
 306
 307         for (end = colors + entries; colors < end; palEntry++, colors++)
 308         {
 309             palEntry->peRed   = colors->rgbRed;
 310             palEntry->peGreen = colors->rgbGreen;
 311             palEntry->peBlue  = colors->rgbBlue;
 312         }
 313     } else {
 314         entries = 0;
 315     }
 316     GDI_HEAP_UNLOCK( dc->w.hPalette );
 317     return entries;
 318 }
 319
 320 /***********************************************************************
 321  *           GetDIBColorTable16    (GDI.603)
 322  */
 323 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 324                                   RGBQUAD *colors )
 325 {
 326     return GetDIBColorTable( hdc, startpos, entries, colors );
 327 }
 328
 329 /***********************************************************************
 330  *           GetDIBColorTable32    (GDI32.169)
 331  */
 332 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 333                                   RGBQUAD *colors )
 334 {
 335     DC * dc;
 336     PALETTEENTRY * palEntry;
 337     PALETTEOBJ * palette;
 338     RGBQUAD *end;
 339
 340     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 341     if (!dc)
 342     {
 343         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 344         if (!dc) return 0;
 345     }
 346
 347     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
 348     {
 349         return 0;
 350     }
 351
 352     /* Transfer color info */
 353
 354     if (dc->w.bitsPerPixel <= 8) {
 355         palEntry = palette->logpalette.palPalEntry + startpos;
 356         if (startpos + entries > (1 << dc->w.bitsPerPixel)) {
 357             entries = (1 << dc->w.bitsPerPixel) - startpos;
 358         }
 359         for (end = colors + entries; colors < end; palEntry++, colors++)
 360         {
 361             colors->rgbRed      = palEntry->peRed;
 362             colors->rgbGreen    = palEntry->peGreen;
 363             colors->rgbBlue     = palEntry->peBlue;
 364             colors->rgbReserved = 0;
 365         }
 366     } else {
 367         entries = 0;
 368     }
 369     GDI_HEAP_UNLOCK( dc->w.hPalette );
 370     return entries;
 371 }
 372
 373 /* FIXME the following two structs should be combined with __sysPalTemplate in
 374    objects/color.c - this should happen after de-X11-ing both of these
 375    files.
 376    NB. RGBQUAD and PALETTENTRY have different orderings of red, green
 377    and blue - sigh */
 378
 379 static RGBQUAD EGAColors[16] = {
 380 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 381     { 0x00, 0x00, 0x00, 0x00 },
 382     { 0x00, 0x00, 0x80, 0x00 },
 383     { 0x00, 0x80, 0x00, 0x00 },
 384     { 0x00, 0x80, 0x80, 0x00 },
 385     { 0x80, 0x00, 0x00, 0x00 },
 386     { 0x80, 0x00, 0x80, 0x00 },
 387     { 0x80, 0x80, 0x00, 0x00 },
 388     { 0x80, 0x80, 0x80, 0x00 },
 389     { 0xc0, 0xc0, 0xc0, 0x00 },
 390     { 0x00, 0x00, 0xff, 0x00 },
 391     { 0x00, 0xff, 0x00, 0x00 },
 392     { 0x00, 0xff, 0xff, 0x00 },
 393     { 0xff, 0x00, 0x00, 0x00 },
 394     { 0xff, 0x00, 0xff, 0x00 },
 395     { 0xff, 0xff, 0x00, 0x00 },
 396     { 0xff, 0xff, 0xff, 0x00 }
 397 };
 398
 399
 400 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 401 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 402     { 0x00, 0x00, 0x00, 0x00 },
 403     { 0x00, 0x00, 0x80, 0x00 },
 404     { 0x00, 0x80, 0x00, 0x00 },
 405     { 0x00, 0x80, 0x80, 0x00 },
 406     { 0x80, 0x00, 0x00, 0x00 },
 407     { 0x80, 0x00, 0x80, 0x00 },
 408     { 0x80, 0x80, 0x00, 0x00 },
 409     { 0xc0, 0xc0, 0xc0, 0x00 },
 410     { 0xc0, 0xdc, 0xc0, 0x00 },
 411     { 0xf0, 0xca, 0xa6, 0x00 },
 412     { 0xf0, 0xfb, 0xff, 0x00 },
 413     { 0xa4, 0xa0, 0xa0, 0x00 },
 414     { 0x80, 0x80, 0x80, 0x00 },
 415     { 0x00, 0x00, 0xf0, 0x00 },
 416     { 0x00, 0xff, 0x00, 0x00 },
 417     { 0x00, 0xff, 0xff, 0x00 },
 418     { 0xff, 0x00, 0x00, 0x00 },
 419     { 0xff, 0x00, 0xff, 0x00 },
 420     { 0xff, 0xff, 0x00, 0x00 },
 421     { 0xff, 0xff, 0xff, 0x00 }
 422 };
 423
 424 /***********************************************************************
 425  *           GetDIBits16    (GDI.441)
 426  */
 427 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 428                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 429                           UINT16 coloruse )
 430 {
 431     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 432 }
 433
 434
 435 /******************************************************************************
 436  * GetDIBits32 [GDI32.170]  Retrieves bits of bitmap and copies to buffer
 437  *
 438  * RETURNS
 439  *    Success: Number of scan lines copied from bitmap
 440  *    Failure: 0
 441  *
 442  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 443  */
 444 INT WINAPI GetDIBits(
 445     HDC hdc,         /* [in]  Handle to device context */
 446     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 447     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 448     UINT lines,      /* [in]  Number of scan lines to copy */
 449     LPVOID bits,       /* [out] Address of array for bitmap bits */
 450     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 451     UINT coloruse)   /* [in]  RGB or palette index */
 452 {
 453     DC * dc;
 454     BITMAPOBJ * bmp;
 455     PALETTEENTRY * palEntry;
 456     PALETTEOBJ * palette;
 457     int i;
 458
 459     if (!info) return 0;
 460     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 461     if (!dc)
 462     {
 463         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 464         if (!dc) return 0;
 465     }
 466     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 467     {
 468         GDI_HEAP_UNLOCK( hdc );
 469         return 0;
 470     }
 471     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
 472     {
 473         GDI_HEAP_UNLOCK( hdc );
 474         GDI_HEAP_UNLOCK( hbitmap );
 475         return 0;
 476     }
 477
 478     /* Transfer color info */
 479
 480     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 481
 482         info->bmiHeader.biClrUsed = 0;
 483
 484         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 485             palEntry = palette->logpalette.palPalEntry;
 486             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 487                 if (coloruse == DIB_RGB_COLORS) {
 488                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 489                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 490                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 491                     info->bmiColors[i].rgbReserved = 0;
 492                 }
 493                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 494             }
 495         } else {
 496             switch (info->bmiHeader.biBitCount) {
 497             case 1:
 498                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 499                   info->bmiColors[0].rgbBlue = 0;
 500                 info->bmiColors[0].rgbReserved = 0;
 501                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 502                   info->bmiColors[1].rgbBlue = 0xff;
 503                 info->bmiColors[1].rgbReserved = 0;
 504                 break;
 505
 506             case 4:
 507                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 508                 break;
 509
 510             case 8:
 511                 {
 512                 INT r, g, b;
 513                 RGBQUAD *color;
 514
 515                 memcpy(info->bmiColors, DefLogPalette,
 516                        10 * sizeof(RGBQUAD));
 517                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 518                        10 * sizeof(RGBQUAD));
 519                 color = info->bmiColors + 10;
 520                 for(r = 0; r <= 5; r++) /* FIXME */
 521                     for(g = 0; g <= 5; g++)
 522                         for(b = 0; b <= 5; b++) {
 523                             color->rgbRed =   (r * 0xff) / 5;
 524                             color->rgbGreen = (g * 0xff) / 5;
 525                             color->rgbBlue =  (b * 0xff) / 5;
 526                             color->rgbReserved = 0;
 527                             color++;
 528                         }
 529                 }
 530             }
 531         }
 532     }
 533
 534     GDI_HEAP_UNLOCK( dc->w.hPalette );
 535
 536     if (bits && lines)
 537     {
 538         /* If the bitmap object already have a dib section that contains image data, get the bits from it*/
 539         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 540         {
 541             /*FIXME: Only RGB dibs supported for now */
 542             int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 543             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 544             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 545             int x, y;
 546
 547             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 548             {
 549                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 550                 dstwidthb = -dstwidthb;
 551             }
 552
 553             switch( info->bmiHeader.biBitCount ) {
 554
 555             case 15:
 556             case 16: /* 16 bpp dstDIB */
 557                 {
 558                     LPWORD dstbits = (LPWORD)dbits;
 559                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 560
 561                     /* FIXME: BI_BITFIELDS not supported yet */
 562
 563                     switch(bmp->dib->dsBm.bmBitsPixel) {
 564
 565                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 566                         {
 567                             /* FIXME: BI_BITFIELDS not supported yet */
 568                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 569                                 memcpy(dbits, sbits, srcwidthb);
 570                         }
 571                         break;
 572
 573                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 574                         {
 575                             LPBYTE srcbits = sbits;
 576
 577                             for( y = 0; y < lines; y++) {
 578                                 for( x = 0; x < srcwidth; x++ )
 579                                     *dstbits++ = ((*srcbits++ >> 3) & bmask) |
 580                                                  (((WORD)*srcbits++ << 2) & gmask) |
 581                                                  (((WORD)*srcbits++ << 7) & rmask);
 582                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 583                                 srcbits = (sbits += srcwidthb);
 584                             }
 585                         }
 586                         break;
 587
 588                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 589                         {
 590                             LPDWORD srcbits = (LPDWORD)sbits;
 591                             DWORD val;
 592
 593                             for( y = 0; y < lines; y++) {
 594                                 for( x = 0; x < srcwidth; x++ ) {
 595                                     val = *srcbits++;
 596                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 597                                                        ((val >> 9) & rmask));
 598                                 }
 599                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 600                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 601                             }
 602                         }
 603                         break;
 604
 605                     default: /* ? bit bmp -> 16 bit DIB */
 606                         FIXME("15/16 bit DIB %d bit bitmap\n",
 607                         bmp->bitmap.bmBitsPixel);
 608                         break;
 609                     }
 610                 }
 611                 break;
 612
 613             case 24: /* 24 bpp dstDIB */
 614                 {
 615                     LPBYTE dstbits = dbits;
 616
 617                     switch(bmp->dib->dsBm.bmBitsPixel) {
 618
 619                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 620                         {
 621                             LPWORD srcbits = (LPWORD)sbits;
 622                             WORD val;
 623
 624                             /* FIXME: BI_BITFIELDS not supported yet */
 625                             for( y = 0; y < lines; y++) {
 626                                 for( x = 0; x < srcwidth; x++ ) {
 627                                     val = *srcbits++;
 628                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 629                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 630                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 631                                 }
 632                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 633                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 634                             }
 635                         }
 636                         break;
 637
 638                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 639                         {
 640                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 641                                 memcpy(dbits, sbits, srcwidthb);
 642                         }
 643                         break;
 644
 645                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 646                         {
 647                             LPBYTE srcbits = (LPBYTE)sbits;
 648
 649                             for( y = 0; y < lines; y++) {
 650                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 651                                     *dstbits++ = *srcbits++;
 652                                     *dstbits++ = *srcbits++;
 653                                     *dstbits++ = *srcbits++;
 654                                 }
 655                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 656                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 657                             }
 658                         }
 659                         break;
 660
 661                     default: /* ? bit bmp -> 24 bit DIB */
 662                         FIXME("24 bit DIB %d bit bitmap\n",
 663                               bmp->bitmap.bmBitsPixel);
 664                         break;
 665                     }
 666                 }
 667                 break;
 668
 669             case 32: /* 32 bpp dstDIB */
 670                 {
 671                     LPDWORD dstbits = (LPDWORD)dbits;
 672
 673                     /* FIXME: BI_BITFIELDS not supported yet */
 674
 675                     switch(bmp->dib->dsBm.bmBitsPixel) {
 676                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 677                         {
 678                             LPWORD srcbits = (LPWORD)sbits;
 679                             DWORD val;
 680
 681                             /* FIXME: BI_BITFIELDS not supported yet */
 682                             for( y = 0; y < lines; y++) {
 683                                 for( x = 0; x < srcwidth; x++ ) {
 684                                     val = (DWORD)*srcbits++;
 685                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 686                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 687                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 688                                 }
 689                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 690                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 691                             }
 692                         }
 693                         break;
 694
 695                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 696                         {
 697                             LPBYTE srcbits = sbits;
 698
 699                             for( y = 0; y < lines; y++) {
 700                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 701                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 702                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 703                                 srcbits=(sbits+=srcwidthb);
 704                             }
 705                         }
 706                         break;
 707
 708                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 709                         {
 710                             /* FIXME: BI_BITFIELDS not supported yet */
 711                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 712                                 memcpy(dbits, sbits, srcwidthb);
 713                         }
 714                         break;
 715
 716                     default: /* ? bit bmp -> 16 bit DIB */
 717                         FIXME("15/16 bit DIB %d bit bitmap\n",
 718                         bmp->bitmap.bmBitsPixel);
 719                         break;
 720                     }
 721                 }
 722                 break;
 723
 724             default: /* ? bit DIB */
 725                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 726                 break;
 727             }
 728         }
 729         /* Otherwise, get bits from the XImage */
 730         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
 731         {
 732             GDI_HEAP_UNLOCK( hdc );
 733             GDI_HEAP_UNLOCK( hbitmap );
 734
 735             return FALSE;
 736         }
 737     }
 738     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 739     {
 740         /* fill in struct members */
 741
 742         if( info->bmiHeader.biBitCount == 0)
 743         {
 744             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 745             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 746             info->bmiHeader.biPlanes = 1;
 747             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 748             info->bmiHeader.biSizeImage =
 749                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 750                                                    bmp->bitmap.bmHeight,
 751                                                    bmp->bitmap.bmBitsPixel );
 752             info->bmiHeader.biCompression = 0;
 753         }
 754         else
 755         {
 756             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 757                                                info->bmiHeader.biWidth,
 758                                                info->bmiHeader.biHeight,
 759                                                info->bmiHeader.biBitCount );
 760         }
 761     }
 762
 763     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 764           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 765           info->bmiHeader.biHeight);
 766
 767     GDI_HEAP_UNLOCK( hdc );
 768     GDI_HEAP_UNLOCK( hbitmap );
 769
 770     return lines;
 771 }
 772
 773
 774 /***********************************************************************
 775  *           CreateDIBitmap16    (GDI.442)
 776  */
 777 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 778                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 779                             UINT16 coloruse )
 780 {
 781     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 782 }
 783
 784
 785 /***********************************************************************
 786  *           CreateDIBitmap32    (GDI32.37)
 787  */
 788 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 789                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 790                             UINT coloruse )
 791 {
 792     HBITMAP handle;
 793     BOOL fColor;
 794     DWORD width;
 795     int height;
 796     WORD bpp;
 797     WORD compr;
 798
 799     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 800     if (height < 0) height = -height;
 801
 802     /* Check if we should create a monochrome or color bitmap. */
 803     /* We create a monochrome bitmap only if it has exactly 2  */
 804     /* colors, which are black followed by white, nothing else.  */
 805     /* In all other cases, we create a color bitmap.           */
 806
 807     if (bpp != 1) fColor = TRUE;
 808     else if ((coloruse != DIB_RGB_COLORS) ||
 809              (init != CBM_INIT) || !data) fColor = FALSE;
 810     else
 811     {
 812         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 813         {
 814             RGBQUAD *rgb = data->bmiColors;
 815             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 816
 817             /* Check if the first color of the colormap is black */
 818             if ((col == RGB(0,0,0)))
 819             {
 820                 rgb++;
 821                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 822                 /* If the second color is white, create a monochrome bitmap */
 823                 fColor =  (col != RGB(0xff,0xff,0xff));
 824             }
 825             /* Note : If the first color of the colormap is white
 826                followed by black, we have to create a color bitmap.
 827                If we don't the white will be displayed in black later on!*/
 828             else fColor = TRUE;
 829         }
 830         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 831         {
 832             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 833             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 834             if ((col == RGB(0,0,0)))
 835             {
 836                 rgb++;
 837                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 838                 fColor = (col != RGB(0xff,0xff,0xff));
 839             }
 840             else fColor = TRUE;
 841         }
 842         else
 843         {
 844             WARN("(%ld): wrong size for data\n",
 845                      data->bmiHeader.biSize );
 846             return 0;
 847         }
 848     }
 849
 850     /* Now create the bitmap */
 851
 852     handle = fColor ? CreateBitmap( width, height, 1, MONITOR_GetDepth(&MONITOR_PrimaryMonitor), NULL ) :
 853                       CreateBitmap( width, height, 1, 1, NULL );
 854     if (!handle) return 0;
 855
 856     if (init == CBM_INIT)
 857         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 858     return handle;
 859 }
 860
 861 /***********************************************************************
 862  *           CreateDIBSection16    (GDI.489)
 863  */
 864 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 865                                      SEGPTR *bits, HANDLE section,
 866                                      DWORD offset)
 867 {
 868     HBITMAP16 hbitmap;
 869     DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
 870     if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 871     if(!dc) return (HBITMAP16) NULL;
 872
 873     hbitmap = dc->funcs->pCreateDIBSection16(dc, bmi, usage, bits, section, offset);
 874
 875     GDI_HEAP_UNLOCK(hdc);
 876
 877     return hbitmap;
 878 }
 879
 880 /***********************************************************************
 881  *           CreateDIBSection32    (GDI32.36)
 882  */
 883 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 884                                 LPVOID *bits, HANDLE section,
 885                                 DWORD offset)
 886 {
 887     HBITMAP hbitmap;
 888     DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
 889     if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 890     if(!dc) return (HBITMAP) NULL;
 891
 892     hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset);
 893
 894     GDI_HEAP_UNLOCK(hdc);
 895
 896     return hbitmap;
 897 }
 898
 899 /***********************************************************************
 900  *           DIB_DeleteDIBSection
 901  */
 902 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
 903 {
 904     if (bmp && bmp->dib)
 905     {
 906         DIBSECTION *dib = bmp->dib;
 907
 908         if (dib->dsBm.bmBits)
 909         {
 910             if (dib->dshSection)
 911                 UnmapViewOfFile(dib->dsBm.bmBits);
 912             else
 913                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 914         }
 915
 916         BITMAP_Driver->pDeleteDIBSection(bmp);
 917
 918         HeapFree(GetProcessHeap(), 0, dib);
 919         bmp->dib = NULL;
 920     }
 921 }
 922
 923 /***********************************************************************
 924  *           DIB_FixColorsToLoadflags
 925  *
 926  * Change color table entries when LR_LOADTRANSPARENT or LR_LOADMAP3DCOLORS
 927  * are in loadflags
 928  */
 929 void DIB_FixColorsToLoadflags(BITMAPINFO * bmi, UINT loadflags, BYTE pix)
 930 {
 931   int colors;
 932   COLORREF c_W, c_S, c_F, c_L, c_C;
 933   int incr,i;
 934   RGBQUAD *ptr;
 935
 936   if (bmi->bmiHeader.biBitCount > 8) return;
 937   if (bmi->bmiHeader.biSize == sizeof(BITMAPINFOHEADER)) incr = 4;
 938   else if (bmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) incr = 3;
 939   else {
 940     WARN("Wrong bitmap header size!\n");
 941     return;
 942   }
 943   colors = bmi->bmiHeader.biClrUsed;
 944   if (!colors && (bmi->bmiHeader.biBitCount <= 8))
 945     colors = 1 << bmi->bmiHeader.biBitCount;
 946   c_W = GetSysColor(COLOR_WINDOW);
 947   c_S = GetSysColor(COLOR_3DSHADOW);
 948   c_F = GetSysColor(COLOR_3DFACE);
 949   c_L = GetSysColor(COLOR_3DLIGHT);
 950   if (loadflags & LR_LOADTRANSPARENT) {
 951     switch (bmi->bmiHeader.biBitCount) {
 952       case 1: pix = pix >> 7; break;
 953       case 4: pix = pix >> 4; break;
 954       case 8: break;
 955       default:
 956         WARN("(%d): Unsupported depth\n", bmi->bmiHeader.biBitCount);
 957         return;
 958     }
 959     if (pix >= colors) {
 960       WARN("pixel has color index greater than biClrUsed!\n");
 961       return;
 962     }
 963     if (loadflags & LR_LOADMAP3DCOLORS) c_W = c_F;
 964     ptr = (RGBQUAD*)((char*)bmi->bmiColors+pix*incr);
 965     ptr->rgbBlue = GetBValue(c_W);
 966     ptr->rgbGreen = GetGValue(c_W);
 967     ptr->rgbRed = GetRValue(c_W);
 968   }
 969   if (loadflags & LR_LOADMAP3DCOLORS)
 970     for (i=0; i<colors; i++) {
 971       ptr = (RGBQUAD*)((char*)bmi->bmiColors+i*incr);
 972       c_C = RGB(ptr->rgbRed, ptr->rgbGreen, ptr->rgbBlue);
 973       if (c_C == RGB(128, 128, 128)) {
 974         ptr->rgbRed = GetRValue(c_S);
 975         ptr->rgbGreen = GetGValue(c_S);
 976         ptr->rgbBlue = GetBValue(c_S);
 977       } else if (c_C == RGB(192, 192, 192)) {
 978         ptr->rgbRed = GetRValue(c_F);
 979         ptr->rgbGreen = GetGValue(c_F);
 980         ptr->rgbBlue = GetBValue(c_F);
 981       } else if (c_C == RGB(223, 223, 223)) {
 982         ptr->rgbRed = GetRValue(c_L);
 983         ptr->rgbGreen = GetGValue(c_L);
 984         ptr->rgbBlue = GetBValue(c_L);
 985       }
 986     }
 987 }
 988
 989 /***********************************************************************
 990  *           DIB_CreateDIBFromBitmap
 991  *  Allocates a packed DIB and copies the bitmap data into it.
 992  */
 993 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 994 {
 995     BITMAPOBJ *pBmp = NULL;
 996     HGLOBAL hPackedDIB = 0;
 997     LPBYTE pPackedDIB = NULL;
 998     LPBITMAPINFOHEADER pbmiHeader = NULL;
 999     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
1000                  OffsetBits = 0, nLinesCopied = 0;
1001
1002     /* Get a pointer to the BITMAPOBJ structure */
1003     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1004
1005     /* Get the bitmap dimensions */
1006     width = pBmp->bitmap.bmWidth;
1007     height = pBmp->bitmap.bmHeight;
1008     depth = pBmp->bitmap.bmBitsPixel;
1009
1010     /*
1011      * A packed DIB contains a BITMAPINFO structure followed immediately by
1012      * an optional color palette and the pixel data.
1013      */
1014
1015     /* Calculate the size of the packed DIB */
1016     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1017     cPackedSize = sizeof(BITMAPINFOHEADER)
1018                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1019                   + cDataSize;
1020     /* Get the offset to the bits */
1021     OffsetBits = cPackedSize - cDataSize;
1022
1023     /* Allocate the packed DIB */
1024     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1025     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1026                              cPackedSize );
1027     if ( !hPackedDIB )
1028     {
1029         WARN("Could not allocate packed DIB!\n");
1030         goto END;
1031     }
1032
1033     /* A packed DIB starts with a BITMAPINFOHEADER */
1034     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1035     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1036
1037     /* Init the BITMAPINFOHEADER */
1038     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1039     pbmiHeader->biWidth = width;
1040     pbmiHeader->biHeight = height;
1041     pbmiHeader->biPlanes = 1;
1042     pbmiHeader->biBitCount = depth;
1043     pbmiHeader->biCompression = BI_RGB;
1044     pbmiHeader->biSizeImage = 0;
1045     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1046     pbmiHeader->biClrUsed = 0;
1047     pbmiHeader->biClrImportant = 0;
1048
1049     /* Retrieve the DIB bits from the bitmap and fill in the
1050      * DIB color table if present */
1051
1052     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1053                              hBmp,                      /* Handle to bitmap */
1054                              0,                         /* First scan line to set in dest bitmap */
1055                              height,                    /* Number of scan lines to copy */
1056                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1057                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1058                              0);                        /* RGB or palette index */
1059     GlobalUnlock(hPackedDIB);
1060
1061     /* Cleanup if GetDIBits failed */
1062     if (nLinesCopied != height)
1063     {
1064         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1065         GlobalFree(hPackedDIB);
1066         hPackedDIB = 0;
1067     }
1068
1069 END:
1070     return hPackedDIB;
1071 }