objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  */
   7
   8 #include <stdlib.h>
   9
  10 #include "winbase.h"
  11 #include "bitmap.h"
  12 #include "callback.h"
  13 #include "gdi.h"
  14 #include "debugtools.h"
  15 #include "palette.h"
  16
  17 DEFAULT_DEBUG_CHANNEL(bitmap);
  18
  19 /***********************************************************************
  20  *           DIB_GetDIBWidthBytes
  21  *
  22  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  23  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  24  */
  25 int DIB_GetDIBWidthBytes( int width, int depth )
  26 {
  27     int words;
  28
  29     switch(depth)
  30     {
  31         case 1:  words = (width + 31) / 32; break;
  32         case 4:  words = (width + 7) / 8; break;
  33         case 8:  words = (width + 3) / 4; break;
  34         case 15:
  35         case 16: words = (width + 1) / 2; break;
  36         case 24: words = (width * 3 + 3)/4; break;
  37
  38         default:
  39             WARN("(%d): Unsupported depth\n", depth );
  40         /* fall through */
  41         case 32:
  42                 words = width;
  43     }
  44     return 4 * words;
  45 }
  46
  47 /***********************************************************************
  48  *           DIB_GetDIBImageBytes
  49  *
  50  * Return the number of bytes used to hold the image in a DIB bitmap.
  51  */
  52 int DIB_GetDIBImageBytes( int width, int height, int depth )
  53 {
  54     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  55 }
  56
  57
  58 /***********************************************************************
  59  *           DIB_BitmapInfoSize
  60  *
  61  * Return the size of the bitmap info structure including color table.
  62  */
  63 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  64 {
  65     int colors;
  66
  67     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  68     {
  69         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  70         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  71         return sizeof(BITMAPCOREHEADER) + colors *
  72              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  73     }
  74     else  /* assume BITMAPINFOHEADER */
  75     {
  76         colors = info->bmiHeader.biClrUsed;
  77         if (!colors && (info->bmiHeader.biBitCount <= 8))
  78             colors = 1 << info->bmiHeader.biBitCount;
  79         return sizeof(BITMAPINFOHEADER) + colors *
  80                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  81     }
  82 }
  83
  84
  85 /***********************************************************************
  86  *           DIB_GetBitmapInfo
  87  *
  88  * Get the info from a bitmap header.
  89  * Return 1 for INFOHEADER, 0 for COREHEADER, -1 for error.
  90  */
  91 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
  92                               int *height, WORD *bpp, WORD *compr )
  93 {
  94     if (header->biSize == sizeof(BITMAPINFOHEADER))
  95     {
  96         *width  = header->biWidth;
  97         *height = header->biHeight;
  98         *bpp    = header->biBitCount;
  99         *compr  = header->biCompression;
 100         return 1;
 101     }
 102     if (header->biSize == sizeof(BITMAPCOREHEADER))
 103     {
 104         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 105         *width  = core->bcWidth;
 106         *height = core->bcHeight;
 107         *bpp    = core->bcBitCount;
 108         *compr  = 0;
 109         return 0;
 110     }
 111     WARN("(%ld): wrong size for header\n", header->biSize );
 112     return -1;
 113 }
 114
 115
 116 /***********************************************************************
 117  *           StretchDIBits16   (GDI.439)
 118  */
 119 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
 120                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
 121                        INT16 heightSrc, const VOID *bits,
 122                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
 123 {
 124     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
 125                                    xSrc, ySrc, widthSrc, heightSrc, bits,
 126                                    info, wUsage, dwRop );
 127 }
 128
 129
 130 /***********************************************************************
 131  *           StretchDIBits   (GDI32.351)
 132  */
 133 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 134                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 135                        INT heightSrc, const void *bits,
 136                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 137 {
 138     DC *dc = DC_GetDCUpdate( hdc );
 139     if(!dc) return FALSE;
 140
 141     if(dc->funcs->pStretchDIBits)
 142            heightSrc = dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
 143                                             heightDst, xSrc, ySrc, widthSrc,
 144                                             heightSrc, bits, info, wUsage,
 145                                             dwRop);
 146     else { /* use StretchBlt */
 147         HBITMAP hBitmap, hOldBitmap;
 148         HDC hdcMem;
 149
 150         hdcMem = CreateCompatibleDC( hdc );
 151         if (info->bmiHeader.biCompression == BI_RLE4 ||
 152             info->bmiHeader.biCompression == BI_RLE8) {
 153
 154            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 155             * contain all the rectangle described in bmiHeader, but only part of it.
 156             * This mean that those undescribed pixels must be left untouched.
 157             * So, we first copy on a memory bitmap the current content of the
 158             * destination rectangle, blit the DIB bits on top of it - hence leaving
 159             * the gaps untouched -, and blitting the rectangle back.
 160             * This insure that gaps are untouched on the destination rectangle
 161             * Not doing so leads to trashed images (the gaps contain what was on the
 162             * memory bitmap => generally black or garbage)
 163             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 164             * another speed vs correctness issue. Anyway, if speed is needed, then the
 165             * pStretchDIBits function shall be implemented.
 166             * ericP (2000/09/09)
 167             */
 168            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 169                                             info->bmiHeader.biHeight);
 170            hOldBitmap = SelectObject( hdcMem, hBitmap );
 171
 172            /* copy existing bitmap from destination dc */
 173            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 174                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 175                        dwRop );
 176            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 177                      info, DIB_RGB_COLORS);
 178
 179         } else {
 180            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 181                                      bits, info, wUsage );
 182            hOldBitmap = SelectObject( hdcMem, hBitmap );
 183         }
 184
 185         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 186            left (negative biHeight) */
 187         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 188                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 189                     widthSrc, heightSrc, dwRop );
 190         SelectObject( hdcMem, hOldBitmap );
 191         DeleteDC( hdcMem );
 192         DeleteObject( hBitmap );
 193     }
 194     GDI_ReleaseObj( hdc );
 195     return heightSrc;
 196 }
 197
 198
 199 /***********************************************************************
 200  *           SetDIBits16    (GDI.440)
 201  */
 202 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 203                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 204                           UINT16 coloruse )
 205 {
 206     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 207 }
 208
 209
 210 /******************************************************************************
 211  * SetDIBits [GDI32.312]  Sets pixels in a bitmap using colors from DIB
 212  *
 213  * PARAMS
 214  *    hdc       [I] Handle to device context
 215  *    hbitmap   [I] Handle to bitmap
 216  *    startscan [I] Starting scan line
 217  *    lines     [I] Number of scan lines
 218  *    bits      [I] Array of bitmap bits
 219  *    info      [I] Address of structure with data
 220  *    coloruse  [I] Type of color indexes to use
 221  *
 222  * RETURNS
 223  *    Success: Number of scan lines copied
 224  *    Failure: 0
 225  */
 226 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 227                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 228                       UINT coloruse )
 229 {
 230     DC *dc;
 231     BITMAPOBJ *bitmap;
 232     INT result;
 233
 234     /* Check parameters */
 235     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 236
 237     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 238     {
 239         GDI_ReleaseObj( hdc );
 240         return 0;
 241     }
 242
 243     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
 244                                        lines, bits, info,
 245                                        coloruse, hbitmap);
 246
 247     GDI_ReleaseObj( hbitmap );
 248     GDI_ReleaseObj( hdc );
 249
 250     return result;
 251 }
 252
 253
 254 /***********************************************************************
 255  *           SetDIBitsToDevice16    (GDI.443)
 256  */
 257 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 258                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 259                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 260                            UINT16 coloruse )
 261 {
 262     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 263                                 startscan, lines, bits, info, coloruse );
 264 }
 265
 266
 267 /***********************************************************************
 268  *           SetDIBitsToDevice   (GDI32.313)
 269  */
 270 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 271                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 272                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 273                            UINT coloruse )
 274 {
 275     INT ret;
 276     DC *dc;
 277
 278     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 279
 280     if(dc->funcs->pSetDIBitsToDevice)
 281         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
 282                                              ySrc, startscan, lines, bits,
 283                                              info, coloruse );
 284     else {
 285         FIXME("unimplemented on hdc %08x\n", hdc);
 286         ret = 0;
 287     }
 288
 289     GDI_ReleaseObj( hdc );
 290     return ret;
 291 }
 292
 293 /***********************************************************************
 294  *           SetDIBColorTable16    (GDI.602)
 295  */
 296 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 297                                   RGBQUAD *colors )
 298 {
 299     return SetDIBColorTable( hdc, startpos, entries, colors );
 300 }
 301
 302 /***********************************************************************
 303  *           SetDIBColorTable    (GDI32.311)
 304  */
 305 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 306                                   RGBQUAD *colors )
 307 {
 308     DC * dc;
 309     PALETTEENTRY * palEntry;
 310     PALETTEOBJ * palette;
 311     RGBQUAD *end;
 312
 313     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 314
 315     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 316     {
 317         GDI_ReleaseObj( hdc );
 318         return 0;
 319     }
 320
 321     /* Transfer color info */
 322
 323     if (dc->bitsPerPixel <= 8) {
 324         palEntry = palette->logpalette.palPalEntry + startpos;
 325         if (startpos + entries > (1 << dc->bitsPerPixel))
 326             entries = (1 << dc->bitsPerPixel) - startpos;
 327
 328         if (startpos + entries > palette->logpalette.palNumEntries)
 329             entries = palette->logpalette.palNumEntries - startpos;
 330
 331         for (end = colors + entries; colors < end; palEntry++, colors++)
 332         {
 333             palEntry->peRed   = colors->rgbRed;
 334             palEntry->peGreen = colors->rgbGreen;
 335             palEntry->peBlue  = colors->rgbBlue;
 336         }
 337     } else {
 338         entries = 0;
 339     }
 340     GDI_ReleaseObj( dc->hPalette );
 341     GDI_ReleaseObj( hdc );
 342     return entries;
 343 }
 344
 345 /***********************************************************************
 346  *           GetDIBColorTable16    (GDI.603)
 347  */
 348 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 349                                   RGBQUAD *colors )
 350 {
 351     return GetDIBColorTable( hdc, startpos, entries, colors );
 352 }
 353
 354 /***********************************************************************
 355  *           GetDIBColorTable    (GDI32.169)
 356  */
 357 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 358                                   RGBQUAD *colors )
 359 {
 360     DC * dc;
 361     PALETTEENTRY * palEntry;
 362     PALETTEOBJ * palette;
 363     RGBQUAD *end;
 364
 365     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 366
 367     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 368     {
 369         GDI_ReleaseObj( hdc );
 370         return 0;
 371     }
 372
 373     /* Transfer color info */
 374
 375     if (dc->bitsPerPixel <= 8) {
 376         palEntry = palette->logpalette.palPalEntry + startpos;
 377         if (startpos + entries > (1 << dc->bitsPerPixel)) {
 378             entries = (1 << dc->bitsPerPixel) - startpos;
 379         }
 380         for (end = colors + entries; colors < end; palEntry++, colors++)
 381         {
 382             colors->rgbRed      = palEntry->peRed;
 383             colors->rgbGreen    = palEntry->peGreen;
 384             colors->rgbBlue     = palEntry->peBlue;
 385             colors->rgbReserved = 0;
 386         }
 387     } else {
 388         entries = 0;
 389     }
 390     GDI_ReleaseObj( dc->hPalette );
 391     GDI_ReleaseObj( hdc );
 392     return entries;
 393 }
 394
 395 /* FIXME the following two structs should be combined with __sysPalTemplate in
 396    objects/color.c - this should happen after de-X11-ing both of these
 397    files.
 398    NB. RGBQUAD and PALETTENTRY have different orderings of red, green
 399    and blue - sigh */
 400
 401 static RGBQUAD EGAColors[16] = {
 402 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 403     { 0x00, 0x00, 0x00, 0x00 },
 404     { 0x00, 0x00, 0x80, 0x00 },
 405     { 0x00, 0x80, 0x00, 0x00 },
 406     { 0x00, 0x80, 0x80, 0x00 },
 407     { 0x80, 0x00, 0x00, 0x00 },
 408     { 0x80, 0x00, 0x80, 0x00 },
 409     { 0x80, 0x80, 0x00, 0x00 },
 410     { 0x80, 0x80, 0x80, 0x00 },
 411     { 0xc0, 0xc0, 0xc0, 0x00 },
 412     { 0x00, 0x00, 0xff, 0x00 },
 413     { 0x00, 0xff, 0x00, 0x00 },
 414     { 0x00, 0xff, 0xff, 0x00 },
 415     { 0xff, 0x00, 0x00, 0x00 },
 416     { 0xff, 0x00, 0xff, 0x00 },
 417     { 0xff, 0xff, 0x00, 0x00 },
 418     { 0xff, 0xff, 0xff, 0x00 }
 419 };
 420
 421
 422 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 423 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 424     { 0x00, 0x00, 0x00, 0x00 },
 425     { 0x00, 0x00, 0x80, 0x00 },
 426     { 0x00, 0x80, 0x00, 0x00 },
 427     { 0x00, 0x80, 0x80, 0x00 },
 428     { 0x80, 0x00, 0x00, 0x00 },
 429     { 0x80, 0x00, 0x80, 0x00 },
 430     { 0x80, 0x80, 0x00, 0x00 },
 431     { 0xc0, 0xc0, 0xc0, 0x00 },
 432     { 0xc0, 0xdc, 0xc0, 0x00 },
 433     { 0xf0, 0xca, 0xa6, 0x00 },
 434     { 0xf0, 0xfb, 0xff, 0x00 },
 435     { 0xa4, 0xa0, 0xa0, 0x00 },
 436     { 0x80, 0x80, 0x80, 0x00 },
 437     { 0x00, 0x00, 0xf0, 0x00 },
 438     { 0x00, 0xff, 0x00, 0x00 },
 439     { 0x00, 0xff, 0xff, 0x00 },
 440     { 0xff, 0x00, 0x00, 0x00 },
 441     { 0xff, 0x00, 0xff, 0x00 },
 442     { 0xff, 0xff, 0x00, 0x00 },
 443     { 0xff, 0xff, 0xff, 0x00 }
 444 };
 445
 446 /***********************************************************************
 447  *           GetDIBits16    (GDI.441)
 448  */
 449 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 450                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 451                           UINT16 coloruse )
 452 {
 453     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 454 }
 455
 456
 457 /******************************************************************************
 458  * GetDIBits [GDI32.170]  Retrieves bits of bitmap and copies to buffer
 459  *
 460  * RETURNS
 461  *    Success: Number of scan lines copied from bitmap
 462  *    Failure: 0
 463  *
 464  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 465  */
 466 INT WINAPI GetDIBits(
 467     HDC hdc,         /* [in]  Handle to device context */
 468     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 469     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 470     UINT lines,      /* [in]  Number of scan lines to copy */
 471     LPVOID bits,       /* [out] Address of array for bitmap bits */
 472     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 473     UINT coloruse)   /* [in]  RGB or palette index */
 474 {
 475     DC * dc;
 476     BITMAPOBJ * bmp;
 477     PALETTEENTRY * palEntry;
 478     PALETTEOBJ * palette;
 479     int i;
 480
 481     if (!info) return 0;
 482     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 483     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 484     {
 485         GDI_ReleaseObj( hdc );
 486         return 0;
 487     }
 488     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 489     {
 490         GDI_ReleaseObj( hdc );
 491         GDI_ReleaseObj( hbitmap );
 492         return 0;
 493     }
 494
 495     /* Transfer color info */
 496
 497     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 498
 499         info->bmiHeader.biClrUsed = 0;
 500
 501         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 502             palEntry = palette->logpalette.palPalEntry;
 503             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 504                 if (coloruse == DIB_RGB_COLORS) {
 505                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 506                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 507                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 508                     info->bmiColors[i].rgbReserved = 0;
 509                 }
 510                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 511             }
 512         } else {
 513             switch (info->bmiHeader.biBitCount) {
 514             case 1:
 515                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 516                   info->bmiColors[0].rgbBlue = 0;
 517                 info->bmiColors[0].rgbReserved = 0;
 518                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 519                   info->bmiColors[1].rgbBlue = 0xff;
 520                 info->bmiColors[1].rgbReserved = 0;
 521                 break;
 522
 523             case 4:
 524                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 525                 break;
 526
 527             case 8:
 528                 {
 529                 INT r, g, b;
 530                 RGBQUAD *color;
 531
 532                 memcpy(info->bmiColors, DefLogPalette,
 533                        10 * sizeof(RGBQUAD));
 534                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 535                        10 * sizeof(RGBQUAD));
 536                 color = info->bmiColors + 10;
 537                 for(r = 0; r <= 5; r++) /* FIXME */
 538                     for(g = 0; g <= 5; g++)
 539                         for(b = 0; b <= 5; b++) {
 540                             color->rgbRed =   (r * 0xff) / 5;
 541                             color->rgbGreen = (g * 0xff) / 5;
 542                             color->rgbBlue =  (b * 0xff) / 5;
 543                             color->rgbReserved = 0;
 544                             color++;
 545                         }
 546                 }
 547             }
 548         }
 549     }
 550
 551     GDI_ReleaseObj( dc->hPalette );
 552
 553     if (bits && lines)
 554     {
 555         /* If the bitmap object already have a dib section that contains image data, get the bits from it*/
 556         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 557         {
 558             /*FIXME: Only RGB dibs supported for now */
 559             int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 560             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 561             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 562             int x, y;
 563
 564             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 565             {
 566                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 567                 dstwidthb = -dstwidthb;
 568             }
 569
 570             switch( info->bmiHeader.biBitCount ) {
 571
 572             case 15:
 573             case 16: /* 16 bpp dstDIB */
 574                 {
 575                     LPWORD dstbits = (LPWORD)dbits;
 576                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 577
 578                     /* FIXME: BI_BITFIELDS not supported yet */
 579
 580                     switch(bmp->dib->dsBm.bmBitsPixel) {
 581
 582                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 583                         {
 584                             /* FIXME: BI_BITFIELDS not supported yet */
 585                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 586                                 memcpy(dbits, sbits, srcwidthb);
 587                         }
 588                         break;
 589
 590                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 591                         {
 592                             LPBYTE srcbits = sbits;
 593
 594                             for( y = 0; y < lines; y++) {
 595                                 for( x = 0; x < srcwidth; x++ )
 596                                     *dstbits++ = ((*srcbits++ >> 3) & bmask) |
 597                                                  (((WORD)*srcbits++ << 2) & gmask) |
 598                                                  (((WORD)*srcbits++ << 7) & rmask);
 599                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 600                                 srcbits = (sbits += srcwidthb);
 601                             }
 602                         }
 603                         break;
 604
 605                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 606                         {
 607                             LPDWORD srcbits = (LPDWORD)sbits;
 608                             DWORD val;
 609
 610                             for( y = 0; y < lines; y++) {
 611                                 for( x = 0; x < srcwidth; x++ ) {
 612                                     val = *srcbits++;
 613                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 614                                                        ((val >> 9) & rmask));
 615                                 }
 616                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 617                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 618                             }
 619                         }
 620                         break;
 621
 622                     default: /* ? bit bmp -> 16 bit DIB */
 623                         FIXME("15/16 bit DIB %d bit bitmap\n",
 624                         bmp->bitmap.bmBitsPixel);
 625                         break;
 626                     }
 627                 }
 628                 break;
 629
 630             case 24: /* 24 bpp dstDIB */
 631                 {
 632                     LPBYTE dstbits = dbits;
 633
 634                     switch(bmp->dib->dsBm.bmBitsPixel) {
 635
 636                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 637                         {
 638                             LPWORD srcbits = (LPWORD)sbits;
 639                             WORD val;
 640
 641                             /* FIXME: BI_BITFIELDS not supported yet */
 642                             for( y = 0; y < lines; y++) {
 643                                 for( x = 0; x < srcwidth; x++ ) {
 644                                     val = *srcbits++;
 645                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 646                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 647                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 648                                 }
 649                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 650                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 651                             }
 652                         }
 653                         break;
 654
 655                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 656                         {
 657                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 658                                 memcpy(dbits, sbits, srcwidthb);
 659                         }
 660                         break;
 661
 662                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 663                         {
 664                             LPBYTE srcbits = (LPBYTE)sbits;
 665
 666                             for( y = 0; y < lines; y++) {
 667                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 668                                     *dstbits++ = *srcbits++;
 669                                     *dstbits++ = *srcbits++;
 670                                     *dstbits++ = *srcbits++;
 671                                 }
 672                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 673                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 674                             }
 675                         }
 676                         break;
 677
 678                     default: /* ? bit bmp -> 24 bit DIB */
 679                         FIXME("24 bit DIB %d bit bitmap\n",
 680                               bmp->bitmap.bmBitsPixel);
 681                         break;
 682                     }
 683                 }
 684                 break;
 685
 686             case 32: /* 32 bpp dstDIB */
 687                 {
 688                     LPDWORD dstbits = (LPDWORD)dbits;
 689
 690                     /* FIXME: BI_BITFIELDS not supported yet */
 691
 692                     switch(bmp->dib->dsBm.bmBitsPixel) {
 693                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 694                         {
 695                             LPWORD srcbits = (LPWORD)sbits;
 696                             DWORD val;
 697
 698                             /* FIXME: BI_BITFIELDS not supported yet */
 699                             for( y = 0; y < lines; y++) {
 700                                 for( x = 0; x < srcwidth; x++ ) {
 701                                     val = (DWORD)*srcbits++;
 702                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 703                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 704                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 705                                 }
 706                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 707                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 708                             }
 709                         }
 710                         break;
 711
 712                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 713                         {
 714                             LPBYTE srcbits = sbits;
 715
 716                             for( y = 0; y < lines; y++) {
 717                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 718                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 719                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 720                                 srcbits=(sbits+=srcwidthb);
 721                             }
 722                         }
 723                         break;
 724
 725                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 726                         {
 727                             /* FIXME: BI_BITFIELDS not supported yet */
 728                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 729                                 memcpy(dbits, sbits, srcwidthb);
 730                         }
 731                         break;
 732
 733                     default: /* ? bit bmp -> 16 bit DIB */
 734                         FIXME("15/16 bit DIB %d bit bitmap\n",
 735                         bmp->bitmap.bmBitsPixel);
 736                         break;
 737                     }
 738                 }
 739                 break;
 740
 741             default: /* ? bit DIB */
 742                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 743                 break;
 744             }
 745         }
 746         /* Otherwise, get bits from the XImage */
 747         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
 748         {
 749             GDI_ReleaseObj( hdc );
 750             GDI_ReleaseObj( hbitmap );
 751
 752             return 0;
 753         }
 754     }
 755     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 756     {
 757         /* fill in struct members */
 758
 759         if( info->bmiHeader.biBitCount == 0)
 760         {
 761             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 762             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 763             info->bmiHeader.biPlanes = 1;
 764             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 765             info->bmiHeader.biSizeImage =
 766                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 767                                                    bmp->bitmap.bmHeight,
 768                                                    bmp->bitmap.bmBitsPixel );
 769             info->bmiHeader.biCompression = 0;
 770         }
 771         else
 772         {
 773             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 774                                                info->bmiHeader.biWidth,
 775                                                info->bmiHeader.biHeight,
 776                                                info->bmiHeader.biBitCount );
 777         }
 778     }
 779
 780     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 781           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 782           info->bmiHeader.biHeight);
 783
 784     GDI_ReleaseObj( hdc );
 785     GDI_ReleaseObj( hbitmap );
 786
 787     return lines;
 788 }
 789
 790
 791 /***********************************************************************
 792  *           CreateDIBitmap16    (GDI.442)
 793  */
 794 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 795                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 796                             UINT16 coloruse )
 797 {
 798     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 799 }
 800
 801
 802 /***********************************************************************
 803  *           CreateDIBitmap    (GDI32.37)
 804  */
 805 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 806                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 807                             UINT coloruse )
 808 {
 809     HBITMAP handle;
 810     BOOL fColor;
 811     DWORD width;
 812     int height;
 813     WORD bpp;
 814     WORD compr;
 815
 816     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 817     if (height < 0) height = -height;
 818
 819     /* Check if we should create a monochrome or color bitmap. */
 820     /* We create a monochrome bitmap only if it has exactly 2  */
 821     /* colors, which are black followed by white, nothing else.  */
 822     /* In all other cases, we create a color bitmap.           */
 823
 824     if (bpp != 1) fColor = TRUE;
 825     else if ((coloruse != DIB_RGB_COLORS) ||
 826              (init != CBM_INIT) || !data) fColor = FALSE;
 827     else
 828     {
 829         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 830         {
 831             RGBQUAD *rgb = data->bmiColors;
 832             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 833
 834             /* Check if the first color of the colormap is black */
 835             if ((col == RGB(0,0,0)))
 836             {
 837                 rgb++;
 838                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 839                 /* If the second color is white, create a monochrome bitmap */
 840                 fColor =  (col != RGB(0xff,0xff,0xff));
 841             }
 842             /* Note : If the first color of the colormap is white
 843                followed by black, we have to create a color bitmap.
 844                If we don't the white will be displayed in black later on!*/
 845             else fColor = TRUE;
 846         }
 847         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 848         {
 849             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 850             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 851             if ((col == RGB(0,0,0)))
 852             {
 853                 rgb++;
 854                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 855                 fColor = (col != RGB(0xff,0xff,0xff));
 856             }
 857             else fColor = TRUE;
 858         }
 859         else
 860         {
 861             WARN("(%ld): wrong size for data\n",
 862                      data->bmiHeader.biSize );
 863             return 0;
 864         }
 865     }
 866
 867     /* Now create the bitmap */
 868
 869     if (fColor)
 870     {
 871         HDC tmpdc = CreateDCA( "DISPLAY", NULL, NULL, NULL );
 872         handle = CreateCompatibleBitmap( tmpdc, width, height );
 873         DeleteDC( tmpdc );
 874     }
 875     else handle = CreateBitmap( width, height, 1, 1, NULL );
 876
 877     if (!handle) return 0;
 878
 879     if (init == CBM_INIT)
 880         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 881     return handle;
 882 }
 883
 884 /***********************************************************************
 885  *           CreateDIBSection16    (GDI.489)
 886  */
 887 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 888                                      SEGPTR *bits, HANDLE section,
 889                                      DWORD offset)
 890 {
 891     HBITMAP16 hbitmap = 0;
 892     DC *dc;
 893     BOOL bDesktopDC = FALSE;
 894
 895     /* If the reference hdc is null, take the desktop dc */
 896     if (hdc == 0)
 897     {
 898         hdc = CreateCompatibleDC(0);
 899         bDesktopDC = TRUE;
 900     }
 901
 902     if ((dc = DC_GetDCPtr( hdc )))
 903     {
 904         hbitmap = dc->funcs->pCreateDIBSection16(dc, bmi, usage, bits, section, offset, 0);
 905         GDI_ReleaseObj(hdc);
 906     }
 907
 908     if (bDesktopDC)
 909       DeleteDC(hdc);
 910
 911     return hbitmap;
 912 }
 913
 914 /***********************************************************************
 915  *           DIB_CreateDIBSection
 916  */
 917 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 918                              LPVOID *bits, HANDLE section,
 919                              DWORD offset, DWORD ovr_pitch)
 920 {
 921     HBITMAP hbitmap = 0;
 922     DC *dc;
 923     BOOL bDesktopDC = FALSE;
 924
 925     /* If the reference hdc is null, take the desktop dc */
 926     if (hdc == 0)
 927     {
 928         hdc = CreateCompatibleDC(0);
 929         bDesktopDC = TRUE;
 930     }
 931
 932     if ((dc = DC_GetDCPtr( hdc )))
 933     {
 934         hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset, ovr_pitch);
 935         GDI_ReleaseObj(hdc);
 936     }
 937
 938     if (bDesktopDC)
 939       DeleteDC(hdc);
 940
 941     return hbitmap;
 942 }
 943
 944 /***********************************************************************
 945  *           CreateDIBSection    (GDI32.36)
 946  */
 947 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 948                                 LPVOID *bits, HANDLE section,
 949                                 DWORD offset)
 950 {
 951     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 952 }
 953
 954 /***********************************************************************
 955  *           DIB_DeleteDIBSection
 956  */
 957 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
 958 {
 959     if (bmp && bmp->dib)
 960     {
 961         DIBSECTION *dib = bmp->dib;
 962
 963         if (dib->dsBm.bmBits)
 964         {
 965             if (dib->dshSection)
 966                 UnmapViewOfFile(dib->dsBm.bmBits);
 967             else if (!dib->dsOffset)
 968                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 969         }
 970
 971         BITMAP_Driver->pDeleteDIBSection(bmp);
 972
 973         HeapFree(GetProcessHeap(), 0, dib);
 974         bmp->dib = NULL;
 975     }
 976 }
 977
 978 /***********************************************************************
 979  *           DIB_CreateDIBFromBitmap
 980  *  Allocates a packed DIB and copies the bitmap data into it.
 981  */
 982 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 983 {
 984     BITMAPOBJ *pBmp = NULL;
 985     HGLOBAL hPackedDIB = 0;
 986     LPBYTE pPackedDIB = NULL;
 987     LPBITMAPINFOHEADER pbmiHeader = NULL;
 988     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 989                  OffsetBits = 0, nLinesCopied = 0;
 990
 991     /* Get a pointer to the BITMAPOBJ structure */
 992     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 993     if (!pBmp) return hPackedDIB;
 994
 995     /* Get the bitmap dimensions */
 996     width = pBmp->bitmap.bmWidth;
 997     height = pBmp->bitmap.bmHeight;
 998     depth = pBmp->bitmap.bmBitsPixel;
 999
1000     /*
1001      * A packed DIB contains a BITMAPINFO structure followed immediately by
1002      * an optional color palette and the pixel data.
1003      */
1004
1005     /* Calculate the size of the packed DIB */
1006     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1007     cPackedSize = sizeof(BITMAPINFOHEADER)
1008                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1009                   + cDataSize;
1010     /* Get the offset to the bits */
1011     OffsetBits = cPackedSize - cDataSize;
1012
1013     /* Allocate the packed DIB */
1014     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1015     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1016                              cPackedSize );
1017     if ( !hPackedDIB )
1018     {
1019         WARN("Could not allocate packed DIB!\n");
1020         goto END;
1021     }
1022
1023     /* A packed DIB starts with a BITMAPINFOHEADER */
1024     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1025     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1026
1027     /* Init the BITMAPINFOHEADER */
1028     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1029     pbmiHeader->biWidth = width;
1030     pbmiHeader->biHeight = height;
1031     pbmiHeader->biPlanes = 1;
1032     pbmiHeader->biBitCount = depth;
1033     pbmiHeader->biCompression = BI_RGB;
1034     pbmiHeader->biSizeImage = 0;
1035     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1036     pbmiHeader->biClrUsed = 0;
1037     pbmiHeader->biClrImportant = 0;
1038
1039     /* Retrieve the DIB bits from the bitmap and fill in the
1040      * DIB color table if present */
1041
1042     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1043                              hBmp,                      /* Handle to bitmap */
1044                              0,                         /* First scan line to set in dest bitmap */
1045                              height,                    /* Number of scan lines to copy */
1046                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1047                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1048                              0);                        /* RGB or palette index */
1049     GlobalUnlock(hPackedDIB);
1050
1051     /* Cleanup if GetDIBits failed */
1052     if (nLinesCopied != height)
1053     {
1054         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1055         GlobalFree(hPackedDIB);
1056         hPackedDIB = 0;
1057     }
1058
1059 END:
1060     GDI_ReleaseObj( hBmp );
1061     return hPackedDIB;
1062 }