objects/dib.c

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