objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "winbase.h"
  25 #include "bitmap.h"
  26 #include "selectors.h"
  27 #include "gdi.h"
  28 #include "wine/debug.h"
  29 #include "palette.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  32
  33 /***********************************************************************
  34  *           DIB_GetDIBWidthBytes
  35  *
  36  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  37  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  38  */
  39 int DIB_GetDIBWidthBytes( int width, int depth )
  40 {
  41     int words;
  42
  43     switch(depth)
  44     {
  45         case 1:  words = (width + 31) / 32; break;
  46         case 4:  words = (width + 7) / 8; break;
  47         case 8:  words = (width + 3) / 4; break;
  48         case 15:
  49         case 16: words = (width + 1) / 2; break;
  50         case 24: words = (width * 3 + 3)/4; break;
  51
  52         default:
  53             WARN("(%d): Unsupported depth\n", depth );
  54         /* fall through */
  55         case 32:
  56                 words = width;
  57     }
  58     return 4 * words;
  59 }
  60
  61 /***********************************************************************
  62  *           DIB_GetDIBImageBytes
  63  *
  64  * Return the number of bytes used to hold the image in a DIB bitmap.
  65  */
  66 int DIB_GetDIBImageBytes( int width, int height, int depth )
  67 {
  68     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  69 }
  70
  71
  72 /***********************************************************************
  73  *           DIB_BitmapInfoSize
  74  *
  75  * Return the size of the bitmap info structure including color table.
  76  */
  77 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  78 {
  79     int colors;
  80
  81     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  82     {
  83         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  84         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  85         return sizeof(BITMAPCOREHEADER) + colors *
  86              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  87     }
  88     else  /* assume BITMAPINFOHEADER */
  89     {
  90         colors = info->bmiHeader.biClrUsed;
  91         if (!colors && (info->bmiHeader.biBitCount <= 8))
  92             colors = 1 << info->bmiHeader.biBitCount;
  93         return sizeof(BITMAPINFOHEADER) + colors *
  94                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  95     }
  96 }
  97
  98
  99 /***********************************************************************
 100  *           DIB_GetBitmapInfo
 101  *
 102  * Get the info from a bitmap header.
 103  * Return 1 for INFOHEADER, 0 for COREHEADER,
 104  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
 105  */
 106 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
 107                               int *height, WORD *bpp, WORD *compr )
 108 {
 109     if (header->biSize == sizeof(BITMAPINFOHEADER))
 110     {
 111         *width  = header->biWidth;
 112         *height = header->biHeight;
 113         *bpp    = header->biBitCount;
 114         *compr  = header->biCompression;
 115         return 1;
 116     }
 117     if (header->biSize == sizeof(BITMAPCOREHEADER))
 118     {
 119         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 120         *width  = core->bcWidth;
 121         *height = core->bcHeight;
 122         *bpp    = core->bcBitCount;
 123         *compr  = 0;
 124         return 0;
 125     }
 126     if (header->biSize == sizeof(BITMAPV4HEADER))
 127     {
 128         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 129         *width  = v4hdr->bV4Width;
 130         *height = v4hdr->bV4Height;
 131         *bpp    = v4hdr->bV4BitCount;
 132         *compr  = v4hdr->bV4Compression;
 133         return 4;
 134     }
 135     if (header->biSize == sizeof(BITMAPV5HEADER))
 136     {
 137         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 138         *width  = v5hdr->bV5Width;
 139         *height = v5hdr->bV5Height;
 140         *bpp    = v5hdr->bV5BitCount;
 141         *compr  = v5hdr->bV5Compression;
 142         return 5;
 143     }
 144     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 145     return -1;
 146 }
 147
 148
 149 /***********************************************************************
 150  *           StretchDIBits   (GDI.439)
 151  */
 152 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
 153                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
 154                        INT16 heightSrc, const VOID *bits,
 155                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
 156 {
 157     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
 158                                    xSrc, ySrc, widthSrc, heightSrc, bits,
 159                                    info, wUsage, dwRop );
 160 }
 161
 162
 163 /***********************************************************************
 164  *           StretchDIBits   (GDI32.@)
 165  */
 166 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 167                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 168                        INT heightSrc, const void *bits,
 169                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 170 {
 171     DC *dc = DC_GetDCUpdate( hdc );
 172     if(!dc) return FALSE;
 173
 174     if(dc->funcs->pStretchDIBits)
 175     {
 176         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 177                                               heightDst, xSrc, ySrc, widthSrc,
 178                                               heightSrc, bits, info, wUsage, dwRop);
 179         GDI_ReleaseObj( hdc );
 180     }
 181     else /* use StretchBlt */
 182     {
 183         HBITMAP hBitmap, hOldBitmap;
 184         HDC hdcMem;
 185
 186         GDI_ReleaseObj( hdc );
 187         hdcMem = CreateCompatibleDC( hdc );
 188         if (info->bmiHeader.biCompression == BI_RLE4 ||
 189             info->bmiHeader.biCompression == BI_RLE8) {
 190
 191            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 192             * contain all the rectangle described in bmiHeader, but only part of it.
 193             * This mean that those undescribed pixels must be left untouched.
 194             * So, we first copy on a memory bitmap the current content of the
 195             * destination rectangle, blit the DIB bits on top of it - hence leaving
 196             * the gaps untouched -, and blitting the rectangle back.
 197             * This insure that gaps are untouched on the destination rectangle
 198             * Not doing so leads to trashed images (the gaps contain what was on the
 199             * memory bitmap => generally black or garbage)
 200             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 201             * another speed vs correctness issue. Anyway, if speed is needed, then the
 202             * pStretchDIBits function shall be implemented.
 203             * ericP (2000/09/09)
 204             */
 205            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 206                                             info->bmiHeader.biHeight);
 207            hOldBitmap = SelectObject( hdcMem, hBitmap );
 208
 209            /* copy existing bitmap from destination dc */
 210            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 211                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 212                        dwRop );
 213            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 214                      info, DIB_RGB_COLORS);
 215
 216         } else {
 217            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 218                                      bits, info, wUsage );
 219            hOldBitmap = SelectObject( hdcMem, hBitmap );
 220         }
 221
 222         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 223            left (negative biHeight) */
 224         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 225                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 226                     widthSrc, heightSrc, dwRop );
 227         SelectObject( hdcMem, hOldBitmap );
 228         DeleteDC( hdcMem );
 229         DeleteObject( hBitmap );
 230     }
 231     return heightSrc;
 232 }
 233
 234
 235 /***********************************************************************
 236  *           SetDIBits    (GDI.440)
 237  */
 238 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 239                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 240                           UINT16 coloruse )
 241 {
 242     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 243 }
 244
 245
 246 /******************************************************************************
 247  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 248  *
 249  * PARAMS
 250  *    hdc       [I] Handle to device context
 251  *    hbitmap   [I] Handle to bitmap
 252  *    startscan [I] Starting scan line
 253  *    lines     [I] Number of scan lines
 254  *    bits      [I] Array of bitmap bits
 255  *    info      [I] Address of structure with data
 256  *    coloruse  [I] Type of color indexes to use
 257  *
 258  * RETURNS
 259  *    Success: Number of scan lines copied
 260  *    Failure: 0
 261  */
 262 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 263                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 264                       UINT coloruse )
 265 {
 266     DC *dc;
 267     INT result = 0;
 268
 269     /* Check parameters */
 270     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 271
 272     if (dc->funcs->pSetDIBits)
 273         result = dc->funcs->pSetDIBits(dc->physDev, hbitmap, startscan, lines, bits, info, coloruse);
 274
 275     GDI_ReleaseObj( hdc );
 276     return result;
 277 }
 278
 279
 280 /***********************************************************************
 281  *           SetDIBitsToDevice    (GDI.443)
 282  */
 283 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 284                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 285                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 286                            UINT16 coloruse )
 287 {
 288     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 289                                 startscan, lines, bits, info, coloruse );
 290 }
 291
 292
 293 /***********************************************************************
 294  *           SetDIBitsToDevice   (GDI32.@)
 295  */
 296 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 297                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 298                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 299                            UINT coloruse )
 300 {
 301     INT ret;
 302     DC *dc;
 303
 304     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 305
 306     if(dc->funcs->pSetDIBitsToDevice)
 307         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 308                                              ySrc, startscan, lines, bits,
 309                                              info, coloruse );
 310     else {
 311         FIXME("unimplemented on hdc %08x\n", hdc);
 312         ret = 0;
 313     }
 314
 315     GDI_ReleaseObj( hdc );
 316     return ret;
 317 }
 318
 319 /***********************************************************************
 320  *           SetDIBColorTable    (GDI.602)
 321  */
 322 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 323                                   RGBQUAD *colors )
 324 {
 325     return SetDIBColorTable( hdc, startpos, entries, colors );
 326 }
 327
 328 /***********************************************************************
 329  *           SetDIBColorTable    (GDI32.@)
 330  */
 331 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 332 {
 333     DC * dc;
 334     UINT result = 0;
 335
 336     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 337
 338     if (dc->funcs->pSetDIBColorTable)
 339         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 340
 341     GDI_ReleaseObj( hdc );
 342     return result;
 343 }
 344
 345 /***********************************************************************
 346  *           GetDIBColorTable    (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.@)
 356  */
 357 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 358 {
 359     DC * dc;
 360     UINT result = 0;
 361
 362     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 363
 364     if (dc->funcs->pGetDIBColorTable)
 365         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 366
 367     GDI_ReleaseObj( hdc );
 368     return result;
 369 }
 370
 371 /* FIXME the following two structs should be combined with __sysPalTemplate in
 372    objects/color.c - this should happen after de-X11-ing both of these
 373    files.
 374    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 375    and blue - sigh */
 376
 377 static RGBQUAD EGAColors[16] = {
 378 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 379     { 0x00, 0x00, 0x00, 0x00 },
 380     { 0x00, 0x00, 0x80, 0x00 },
 381     { 0x00, 0x80, 0x00, 0x00 },
 382     { 0x00, 0x80, 0x80, 0x00 },
 383     { 0x80, 0x00, 0x00, 0x00 },
 384     { 0x80, 0x00, 0x80, 0x00 },
 385     { 0x80, 0x80, 0x00, 0x00 },
 386     { 0x80, 0x80, 0x80, 0x00 },
 387     { 0xc0, 0xc0, 0xc0, 0x00 },
 388     { 0x00, 0x00, 0xff, 0x00 },
 389     { 0x00, 0xff, 0x00, 0x00 },
 390     { 0x00, 0xff, 0xff, 0x00 },
 391     { 0xff, 0x00, 0x00, 0x00 },
 392     { 0xff, 0x00, 0xff, 0x00 },
 393     { 0xff, 0xff, 0x00, 0x00 },
 394     { 0xff, 0xff, 0xff, 0x00 }
 395 };
 396
 397
 398 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 399 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 400     { 0x00, 0x00, 0x00, 0x00 },
 401     { 0x00, 0x00, 0x80, 0x00 },
 402     { 0x00, 0x80, 0x00, 0x00 },
 403     { 0x00, 0x80, 0x80, 0x00 },
 404     { 0x80, 0x00, 0x00, 0x00 },
 405     { 0x80, 0x00, 0x80, 0x00 },
 406     { 0x80, 0x80, 0x00, 0x00 },
 407     { 0xc0, 0xc0, 0xc0, 0x00 },
 408     { 0xc0, 0xdc, 0xc0, 0x00 },
 409     { 0xf0, 0xca, 0xa6, 0x00 },
 410     { 0xf0, 0xfb, 0xff, 0x00 },
 411     { 0xa4, 0xa0, 0xa0, 0x00 },
 412     { 0x80, 0x80, 0x80, 0x00 },
 413     { 0x00, 0x00, 0xf0, 0x00 },
 414     { 0x00, 0xff, 0x00, 0x00 },
 415     { 0x00, 0xff, 0xff, 0x00 },
 416     { 0xff, 0x00, 0x00, 0x00 },
 417     { 0xff, 0x00, 0xff, 0x00 },
 418     { 0xff, 0xff, 0x00, 0x00 },
 419     { 0xff, 0xff, 0xff, 0x00 }
 420 };
 421
 422 /***********************************************************************
 423  *           GetDIBits    (GDI.441)
 424  */
 425 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 426                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 427                           UINT16 coloruse )
 428 {
 429     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 430 }
 431
 432
 433 /******************************************************************************
 434  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 435  *
 436  * RETURNS
 437  *    Success: Number of scan lines copied from bitmap
 438  *    Failure: 0
 439  *
 440  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 441  */
 442 INT WINAPI GetDIBits(
 443     HDC hdc,         /* [in]  Handle to device context */
 444     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 445     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 446     UINT lines,      /* [in]  Number of scan lines to copy */
 447     LPVOID bits,       /* [out] Address of array for bitmap bits */
 448     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 449     UINT coloruse)   /* [in]  RGB or palette index */
 450 {
 451     DC * dc;
 452     BITMAPOBJ * bmp;
 453     PALETTEENTRY * palEntry;
 454     PALETTEOBJ * palette;
 455     int i;
 456
 457     if (!info) return 0;
 458     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 459     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 460     {
 461         GDI_ReleaseObj( hdc );
 462         return 0;
 463     }
 464     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 465     {
 466         GDI_ReleaseObj( hdc );
 467         GDI_ReleaseObj( hbitmap );
 468         return 0;
 469     }
 470
 471     /* Transfer color info */
 472
 473     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 474
 475         info->bmiHeader.biClrUsed = 0;
 476
 477         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 478             palEntry = palette->logpalette.palPalEntry;
 479             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 480                 if (coloruse == DIB_RGB_COLORS) {
 481                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 482                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 483                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 484                     info->bmiColors[i].rgbReserved = 0;
 485                 }
 486                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 487             }
 488         } else {
 489             switch (info->bmiHeader.biBitCount) {
 490             case 1:
 491                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 492                   info->bmiColors[0].rgbBlue = 0;
 493                 info->bmiColors[0].rgbReserved = 0;
 494                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 495                   info->bmiColors[1].rgbBlue = 0xff;
 496                 info->bmiColors[1].rgbReserved = 0;
 497                 break;
 498
 499             case 4:
 500                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 501                 break;
 502
 503             case 8:
 504                 {
 505                 INT r, g, b;
 506                 RGBQUAD *color;
 507
 508                 memcpy(info->bmiColors, DefLogPalette,
 509                        10 * sizeof(RGBQUAD));
 510                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 511                        10 * sizeof(RGBQUAD));
 512                 color = info->bmiColors + 10;
 513                 for(r = 0; r <= 5; r++) /* FIXME */
 514                     for(g = 0; g <= 5; g++)
 515                         for(b = 0; b <= 5; b++) {
 516                             color->rgbRed =   (r * 0xff) / 5;
 517                             color->rgbGreen = (g * 0xff) / 5;
 518                             color->rgbBlue =  (b * 0xff) / 5;
 519                             color->rgbReserved = 0;
 520                             color++;
 521                         }
 522                 }
 523             }
 524         }
 525     }
 526
 527     GDI_ReleaseObj( dc->hPalette );
 528
 529     if (bits && lines)
 530     {
 531         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 532         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 533         {
 534             /*FIXME: Only RGB dibs supported for now */
 535             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 536             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 537             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 538             unsigned int x, y;
 539
 540             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 541             {
 542                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 543                 dstwidthb = -dstwidthb;
 544             }
 545
 546             switch( info->bmiHeader.biBitCount ) {
 547
 548             case 15:
 549             case 16: /* 16 bpp dstDIB */
 550                 {
 551                     LPWORD dstbits = (LPWORD)dbits;
 552                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 553
 554                     /* FIXME: BI_BITFIELDS not supported yet */
 555
 556                     switch(bmp->dib->dsBm.bmBitsPixel) {
 557
 558                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 559                         {
 560                             /* FIXME: BI_BITFIELDS not supported yet */
 561                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 562                                 memcpy(dbits, sbits, srcwidthb);
 563                         }
 564                         break;
 565
 566                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 567                         {
 568                             LPBYTE srcbits = sbits;
 569
 570                             for( y = 0; y < lines; y++) {
 571                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 572                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 573                                                  (((WORD)srcbits[1] << 2) & gmask) |
 574                                                  (((WORD)srcbits[2] << 7) & rmask);
 575
 576                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 577                                 srcbits = (sbits += srcwidthb);
 578                             }
 579                         }
 580                         break;
 581
 582                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 583                         {
 584                             LPDWORD srcbits = (LPDWORD)sbits;
 585                             DWORD val;
 586
 587                             for( y = 0; y < lines; y++) {
 588                                 for( x = 0; x < srcwidth; x++ ) {
 589                                     val = *srcbits++;
 590                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 591                                                        ((val >> 9) & rmask));
 592                                 }
 593                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 594                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 595                             }
 596                         }
 597                         break;
 598
 599                     default: /* ? bit bmp -> 16 bit DIB */
 600                         FIXME("15/16 bit DIB %d bit bitmap\n",
 601                         bmp->bitmap.bmBitsPixel);
 602                         break;
 603                     }
 604                 }
 605                 break;
 606
 607             case 24: /* 24 bpp dstDIB */
 608                 {
 609                     LPBYTE dstbits = dbits;
 610
 611                     switch(bmp->dib->dsBm.bmBitsPixel) {
 612
 613                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 614                         {
 615                             LPWORD srcbits = (LPWORD)sbits;
 616                             WORD val;
 617
 618                             /* FIXME: BI_BITFIELDS not supported yet */
 619                             for( y = 0; y < lines; y++) {
 620                                 for( x = 0; x < srcwidth; x++ ) {
 621                                     val = *srcbits++;
 622                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 623                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 624                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 625                                 }
 626                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 627                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 628                             }
 629                         }
 630                         break;
 631
 632                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 633                         {
 634                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 635                                 memcpy(dbits, sbits, srcwidthb);
 636                         }
 637                         break;
 638
 639                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 640                         {
 641                             LPBYTE srcbits = (LPBYTE)sbits;
 642
 643                             for( y = 0; y < lines; y++) {
 644                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 645                                     *dstbits++ = *srcbits++;
 646                                     *dstbits++ = *srcbits++;
 647                                     *dstbits++ = *srcbits++;
 648                                 }
 649                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 650                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 651                             }
 652                         }
 653                         break;
 654
 655                     default: /* ? bit bmp -> 24 bit DIB */
 656                         FIXME("24 bit DIB %d bit bitmap\n",
 657                               bmp->bitmap.bmBitsPixel);
 658                         break;
 659                     }
 660                 }
 661                 break;
 662
 663             case 32: /* 32 bpp dstDIB */
 664                 {
 665                     LPDWORD dstbits = (LPDWORD)dbits;
 666
 667                     /* FIXME: BI_BITFIELDS not supported yet */
 668
 669                     switch(bmp->dib->dsBm.bmBitsPixel) {
 670                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 671                         {
 672                             LPWORD srcbits = (LPWORD)sbits;
 673                             DWORD val;
 674
 675                             /* FIXME: BI_BITFIELDS not supported yet */
 676                             for( y = 0; y < lines; y++) {
 677                                 for( x = 0; x < srcwidth; x++ ) {
 678                                     val = (DWORD)*srcbits++;
 679                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 680                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 681                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 682                                 }
 683                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 684                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 685                             }
 686                         }
 687                         break;
 688
 689                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 690                         {
 691                             LPBYTE srcbits = sbits;
 692
 693                             for( y = 0; y < lines; y++) {
 694                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 695                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 696                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 697                                 srcbits=(sbits+=srcwidthb);
 698                             }
 699                         }
 700                         break;
 701
 702                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 703                         {
 704                             /* FIXME: BI_BITFIELDS not supported yet */
 705                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 706                                 memcpy(dbits, sbits, srcwidthb);
 707                         }
 708                         break;
 709
 710                     default: /* ? bit bmp -> 16 bit DIB */
 711                         FIXME("15/16 bit DIB %d bit bitmap\n",
 712                         bmp->bitmap.bmBitsPixel);
 713                         break;
 714                     }
 715                 }
 716                 break;
 717
 718             default: /* ? bit DIB */
 719                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 720                 break;
 721             }
 722         }
 723         /* Otherwise, get bits from the XImage */
 724         else if (!dc->funcs->pGetDIBits ||
 725                  !dc->funcs->pGetDIBits(dc->physDev, hbitmap, startscan, lines, bits, info, coloruse))
 726         {
 727             GDI_ReleaseObj( hdc );
 728             GDI_ReleaseObj( hbitmap );
 729
 730             return 0;
 731         }
 732     }
 733     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 734     {
 735         /* fill in struct members */
 736
 737         if( info->bmiHeader.biBitCount == 0)
 738         {
 739             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 740             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 741             info->bmiHeader.biPlanes = 1;
 742             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 743             info->bmiHeader.biSizeImage =
 744                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 745                                                    bmp->bitmap.bmHeight,
 746                                                    bmp->bitmap.bmBitsPixel );
 747             info->bmiHeader.biCompression = 0;
 748         }
 749         else
 750         {
 751             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 752                                                info->bmiHeader.biWidth,
 753                                                info->bmiHeader.biHeight,
 754                                                info->bmiHeader.biBitCount );
 755         }
 756     }
 757
 758     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 759           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 760           info->bmiHeader.biHeight);
 761
 762     GDI_ReleaseObj( hdc );
 763     GDI_ReleaseObj( hbitmap );
 764
 765     return lines;
 766 }
 767
 768
 769 /***********************************************************************
 770  *           CreateDIBitmap    (GDI.442)
 771  */
 772 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 773                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 774                             UINT16 coloruse )
 775 {
 776     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 777 }
 778
 779
 780 /***********************************************************************
 781  *           CreateDIBitmap    (GDI32.@)
 782  */
 783 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 784                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 785                             UINT coloruse )
 786 {
 787     HBITMAP handle;
 788     BOOL fColor;
 789     DWORD width;
 790     int height;
 791     WORD bpp;
 792     WORD compr;
 793
 794     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 795     if (height < 0) height = -height;
 796
 797     /* Check if we should create a monochrome or color bitmap. */
 798     /* We create a monochrome bitmap only if it has exactly 2  */
 799     /* colors, which are black followed by white, nothing else.  */
 800     /* In all other cases, we create a color bitmap.           */
 801
 802     if (bpp != 1) fColor = TRUE;
 803     else if ((coloruse != DIB_RGB_COLORS) ||
 804              (init != CBM_INIT) || !data) fColor = FALSE;
 805     else
 806     {
 807         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 808         {
 809             RGBQUAD *rgb = data->bmiColors;
 810             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 811
 812             /* Check if the first color of the colormap is black */
 813             if ((col == RGB(0,0,0)))
 814             {
 815                 rgb++;
 816                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 817                 /* If the second color is white, create a monochrome bitmap */
 818                 fColor =  (col != RGB(0xff,0xff,0xff));
 819             }
 820             /* Note : If the first color of the colormap is white
 821                followed by black, we have to create a color bitmap.
 822                If we don't the white will be displayed in black later on!*/
 823             else fColor = TRUE;
 824         }
 825         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 826         {
 827             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 828             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 829             if ((col == RGB(0,0,0)))
 830             {
 831                 rgb++;
 832                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 833                 fColor = (col != RGB(0xff,0xff,0xff));
 834             }
 835             else fColor = TRUE;
 836         }
 837         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 838         { /* FIXME: correct ? */
 839             RGBQUAD *rgb = data->bmiColors;
 840             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 841
 842             /* Check if the first color of the colormap is black */
 843             if ((col == RGB(0,0,0)))
 844             {
 845                 rgb++;
 846                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 847                 /* If the second color is white, create a monochrome bitmap */
 848                 fColor =  (col != RGB(0xff,0xff,0xff));
 849             }
 850             /* Note : If the first color of the colormap is white
 851                followed by black, we have to create a color bitmap.
 852                If we don't the white will be displayed in black later on!*/
 853             else fColor = TRUE;
 854         }
 855         else
 856         {
 857             ERR("(%ld): wrong/unknown size for data\n",
 858                      data->bmiHeader.biSize );
 859             return 0;
 860         }
 861     }
 862
 863     /* Now create the bitmap */
 864
 865     if (fColor)
 866         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 867                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 868     else handle = CreateBitmap( width, height, 1, 1, NULL );
 869
 870     if (!handle) return 0;
 871
 872     if (init == CBM_INIT)
 873         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 874     return handle;
 875 }
 876
 877 /***********************************************************************
 878  *           CreateDIBSection    (GDI.489)
 879  */
 880 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 881                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 882 {
 883     LPVOID bits32;
 884     HBITMAP hbitmap;
 885
 886     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 887     if (hbitmap)
 888     {
 889         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 890         if (bmp && bmp->dib && bits32)
 891         {
 892             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 893             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 894             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 895             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 896                          bi->biSizeImage : width_bytes * height;
 897
 898             WORD sel = SELECTOR_AllocBlock( bits32, size, WINE_LDT_FLAGS_DATA );
 899             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 900             if (bits16) *bits16 = bmp->segptr_bits;
 901         }
 902         if (bmp) GDI_ReleaseObj( hbitmap );
 903     }
 904     return hbitmap;
 905 }
 906
 907 /***********************************************************************
 908  *           DIB_CreateDIBSection
 909  */
 910 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 911                              LPVOID *bits, HANDLE section,
 912                              DWORD offset, DWORD ovr_pitch)
 913 {
 914     HBITMAP hbitmap = 0;
 915     DC *dc;
 916     BOOL bDesktopDC = FALSE;
 917
 918     /* If the reference hdc is null, take the desktop dc */
 919     if (hdc == 0)
 920     {
 921         hdc = CreateCompatibleDC(0);
 922         bDesktopDC = TRUE;
 923     }
 924
 925     if ((dc = DC_GetDCPtr( hdc )))
 926     {
 927         hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 928         GDI_ReleaseObj(hdc);
 929     }
 930
 931     if (bDesktopDC)
 932       DeleteDC(hdc);
 933
 934     return hbitmap;
 935 }
 936
 937 /***********************************************************************
 938  *           CreateDIBSection    (GDI32.@)
 939  */
 940 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 941                                 LPVOID *bits, HANDLE section,
 942                                 DWORD offset)
 943 {
 944     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 945 }
 946
 947 /***********************************************************************
 948  *           DIB_CreateDIBFromBitmap
 949  *  Allocates a packed DIB and copies the bitmap data into it.
 950  */
 951 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 952 {
 953     BITMAPOBJ *pBmp = NULL;
 954     HGLOBAL hPackedDIB = 0;
 955     LPBYTE pPackedDIB = NULL;
 956     LPBITMAPINFOHEADER pbmiHeader = NULL;
 957     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 958                  OffsetBits = 0, nLinesCopied = 0;
 959
 960     /* Get a pointer to the BITMAPOBJ structure */
 961     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 962     if (!pBmp) return hPackedDIB;
 963
 964     /* Get the bitmap dimensions */
 965     width = pBmp->bitmap.bmWidth;
 966     height = pBmp->bitmap.bmHeight;
 967     depth = pBmp->bitmap.bmBitsPixel;
 968
 969     /*
 970      * A packed DIB contains a BITMAPINFO structure followed immediately by
 971      * an optional color palette and the pixel data.
 972      */
 973
 974     /* Calculate the size of the packed DIB */
 975     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 976     cPackedSize = sizeof(BITMAPINFOHEADER)
 977                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 978                   + cDataSize;
 979     /* Get the offset to the bits */
 980     OffsetBits = cPackedSize - cDataSize;
 981
 982     /* Allocate the packed DIB */
 983     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 984     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 985                              cPackedSize );
 986     if ( !hPackedDIB )
 987     {
 988         WARN("Could not allocate packed DIB!\n");
 989         goto END;
 990     }
 991
 992     /* A packed DIB starts with a BITMAPINFOHEADER */
 993     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 994     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 995
 996     /* Init the BITMAPINFOHEADER */
 997     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 998     pbmiHeader->biWidth = width;
 999     pbmiHeader->biHeight = height;
1000     pbmiHeader->biPlanes = 1;
1001     pbmiHeader->biBitCount = depth;
1002     pbmiHeader->biCompression = BI_RGB;
1003     pbmiHeader->biSizeImage = 0;
1004     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1005     pbmiHeader->biClrUsed = 0;
1006     pbmiHeader->biClrImportant = 0;
1007
1008     /* Retrieve the DIB bits from the bitmap and fill in the
1009      * DIB color table if present */
1010
1011     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1012                              hBmp,                      /* Handle to bitmap */
1013                              0,                         /* First scan line to set in dest bitmap */
1014                              height,                    /* Number of scan lines to copy */
1015                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1016                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1017                              0);                        /* RGB or palette index */
1018     GlobalUnlock(hPackedDIB);
1019
1020     /* Cleanup if GetDIBits failed */
1021     if (nLinesCopied != height)
1022     {
1023         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1024         GlobalFree(hPackedDIB);
1025         hPackedDIB = 0;
1026     }
1027
1028 END:
1029     GDI_ReleaseObj( hBmp );
1030     return hPackedDIB;
1031 }