git.oblomov.eu Git - wine/blob - 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, 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     BITMAPOBJ *bitmap;
 268     INT result;
 269
 270     /* Check parameters */
 271     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 272
 273     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 274     {
 275         GDI_ReleaseObj( hdc );
 276         return 0;
 277     }
 278
 279     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
 280                                        lines, bits, info,
 281                                        coloruse, hbitmap);
 282
 283     GDI_ReleaseObj( hbitmap );
 284     GDI_ReleaseObj( hdc );
 285
 286     return result;
 287 }
 288
 289
 290 /***********************************************************************
 291  *           SetDIBitsToDevice    (GDI.443)
 292  */
 293 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 294                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 295                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 296                            UINT16 coloruse )
 297 {
 298     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 299                                 startscan, lines, bits, info, coloruse );
 300 }
 301
 302
 303 /***********************************************************************
 304  *           SetDIBitsToDevice   (GDI32.@)
 305  */
 306 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 307                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 308                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 309                            UINT coloruse )
 310 {
 311     INT ret;
 312     DC *dc;
 313
 314     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 315
 316     if(dc->funcs->pSetDIBitsToDevice)
 317         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
 318                                              ySrc, startscan, lines, bits,
 319                                              info, coloruse );
 320     else {
 321         FIXME("unimplemented on hdc %08x\n", hdc);
 322         ret = 0;
 323     }
 324
 325     GDI_ReleaseObj( hdc );
 326     return ret;
 327 }
 328
 329 /***********************************************************************
 330  *           SetDIBColorTable    (GDI.602)
 331  */
 332 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 333                                   RGBQUAD *colors )
 334 {
 335     return SetDIBColorTable( hdc, startpos, entries, colors );
 336 }
 337
 338 /***********************************************************************
 339  *           SetDIBColorTable    (GDI32.@)
 340  */
 341 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 342                                   RGBQUAD *colors )
 343 {
 344     DC * dc;
 345     BITMAPOBJ * bmp;
 346     UINT result;
 347
 348     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 349
 350     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 351     {
 352         GDI_ReleaseObj( hdc );
 353         return 0;
 354     }
 355
 356     result = BITMAP_Driver->pSetDIBColorTable(bmp, dc, startpos, entries, colors);
 357
 358     GDI_ReleaseObj( dc->hBitmap );
 359     GDI_ReleaseObj( hdc );
 360     return result;
 361 }
 362
 363 /***********************************************************************
 364  *           GetDIBColorTable    (GDI.603)
 365  */
 366 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 367                                   RGBQUAD *colors )
 368 {
 369     return GetDIBColorTable( hdc, startpos, entries, colors );
 370 }
 371
 372 /***********************************************************************
 373  *           GetDIBColorTable    (GDI32.@)
 374  */
 375 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 376                                   RGBQUAD *colors )
 377 {
 378     DC * dc;
 379     BITMAPOBJ * bmp;
 380     UINT result;
 381
 382     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 383
 384     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 385     {
 386         GDI_ReleaseObj( hdc );
 387         return 0;
 388     }
 389
 390     result = BITMAP_Driver->pGetDIBColorTable(bmp, dc, startpos, entries, colors);
 391
 392     GDI_ReleaseObj( dc->hBitmap );
 393     GDI_ReleaseObj( hdc );
 394     return result;
 395 }
 396
 397 /* FIXME the following two structs should be combined with __sysPalTemplate in
 398    objects/color.c - this should happen after de-X11-ing both of these
 399    files.
 400    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 401    and blue - sigh */
 402
 403 static RGBQUAD EGAColors[16] = {
 404 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 405     { 0x00, 0x00, 0x00, 0x00 },
 406     { 0x00, 0x00, 0x80, 0x00 },
 407     { 0x00, 0x80, 0x00, 0x00 },
 408     { 0x00, 0x80, 0x80, 0x00 },
 409     { 0x80, 0x00, 0x00, 0x00 },
 410     { 0x80, 0x00, 0x80, 0x00 },
 411     { 0x80, 0x80, 0x00, 0x00 },
 412     { 0x80, 0x80, 0x80, 0x00 },
 413     { 0xc0, 0xc0, 0xc0, 0x00 },
 414     { 0x00, 0x00, 0xff, 0x00 },
 415     { 0x00, 0xff, 0x00, 0x00 },
 416     { 0x00, 0xff, 0xff, 0x00 },
 417     { 0xff, 0x00, 0x00, 0x00 },
 418     { 0xff, 0x00, 0xff, 0x00 },
 419     { 0xff, 0xff, 0x00, 0x00 },
 420     { 0xff, 0xff, 0xff, 0x00 }
 421 };
 422
 423
 424 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 425 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 426     { 0x00, 0x00, 0x00, 0x00 },
 427     { 0x00, 0x00, 0x80, 0x00 },
 428     { 0x00, 0x80, 0x00, 0x00 },
 429     { 0x00, 0x80, 0x80, 0x00 },
 430     { 0x80, 0x00, 0x00, 0x00 },
 431     { 0x80, 0x00, 0x80, 0x00 },
 432     { 0x80, 0x80, 0x00, 0x00 },
 433     { 0xc0, 0xc0, 0xc0, 0x00 },
 434     { 0xc0, 0xdc, 0xc0, 0x00 },
 435     { 0xf0, 0xca, 0xa6, 0x00 },
 436     { 0xf0, 0xfb, 0xff, 0x00 },
 437     { 0xa4, 0xa0, 0xa0, 0x00 },
 438     { 0x80, 0x80, 0x80, 0x00 },
 439     { 0x00, 0x00, 0xf0, 0x00 },
 440     { 0x00, 0xff, 0x00, 0x00 },
 441     { 0x00, 0xff, 0xff, 0x00 },
 442     { 0xff, 0x00, 0x00, 0x00 },
 443     { 0xff, 0x00, 0xff, 0x00 },
 444     { 0xff, 0xff, 0x00, 0x00 },
 445     { 0xff, 0xff, 0xff, 0x00 }
 446 };
 447
 448 /***********************************************************************
 449  *           GetDIBits    (GDI.441)
 450  */
 451 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 452                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 453                           UINT16 coloruse )
 454 {
 455     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 456 }
 457
 458
 459 /******************************************************************************
 460  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 461  *
 462  * RETURNS
 463  *    Success: Number of scan lines copied from bitmap
 464  *    Failure: 0
 465  *
 466  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 467  */
 468 INT WINAPI GetDIBits(
 469     HDC hdc,         /* [in]  Handle to device context */
 470     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 471     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 472     UINT lines,      /* [in]  Number of scan lines to copy */
 473     LPVOID bits,       /* [out] Address of array for bitmap bits */
 474     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 475     UINT coloruse)   /* [in]  RGB or palette index */
 476 {
 477     DC * dc;
 478     BITMAPOBJ * bmp;
 479     PALETTEENTRY * palEntry;
 480     PALETTEOBJ * palette;
 481     int i;
 482
 483     if (!info) return 0;
 484     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 485     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 486     {
 487         GDI_ReleaseObj( hdc );
 488         return 0;
 489     }
 490     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 491     {
 492         GDI_ReleaseObj( hdc );
 493         GDI_ReleaseObj( hbitmap );
 494         return 0;
 495     }
 496
 497     /* Transfer color info */
 498
 499     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 500
 501         info->bmiHeader.biClrUsed = 0;
 502
 503         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 504             palEntry = palette->logpalette.palPalEntry;
 505             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 506                 if (coloruse == DIB_RGB_COLORS) {
 507                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 508                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 509                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 510                     info->bmiColors[i].rgbReserved = 0;
 511                 }
 512                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 513             }
 514         } else {
 515             switch (info->bmiHeader.biBitCount) {
 516             case 1:
 517                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 518                   info->bmiColors[0].rgbBlue = 0;
 519                 info->bmiColors[0].rgbReserved = 0;
 520                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 521                   info->bmiColors[1].rgbBlue = 0xff;
 522                 info->bmiColors[1].rgbReserved = 0;
 523                 break;
 524
 525             case 4:
 526                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 527                 break;
 528
 529             case 8:
 530                 {
 531                 INT r, g, b;
 532                 RGBQUAD *color;
 533
 534                 memcpy(info->bmiColors, DefLogPalette,
 535                        10 * sizeof(RGBQUAD));
 536                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 537                        10 * sizeof(RGBQUAD));
 538                 color = info->bmiColors + 10;
 539                 for(r = 0; r <= 5; r++) /* FIXME */
 540                     for(g = 0; g <= 5; g++)
 541                         for(b = 0; b <= 5; b++) {
 542                             color->rgbRed =   (r * 0xff) / 5;
 543                             color->rgbGreen = (g * 0xff) / 5;
 544                             color->rgbBlue =  (b * 0xff) / 5;
 545                             color->rgbReserved = 0;
 546                             color++;
 547                         }
 548                 }
 549             }
 550         }
 551     }
 552
 553     GDI_ReleaseObj( dc->hPalette );
 554
 555     if (bits && lines)
 556     {
 557         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 558         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 559         {
 560             /*FIXME: Only RGB dibs supported for now */
 561             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 562             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 563             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 564             unsigned int x, y;
 565
 566             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 567             {
 568                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 569                 dstwidthb = -dstwidthb;
 570             }
 571
 572             switch( info->bmiHeader.biBitCount ) {
 573
 574             case 15:
 575             case 16: /* 16 bpp dstDIB */
 576                 {
 577                     LPWORD dstbits = (LPWORD)dbits;
 578                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 579
 580                     /* FIXME: BI_BITFIELDS not supported yet */
 581
 582                     switch(bmp->dib->dsBm.bmBitsPixel) {
 583
 584                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 585                         {
 586                             /* FIXME: BI_BITFIELDS not supported yet */
 587                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 588                                 memcpy(dbits, sbits, srcwidthb);
 589                         }
 590                         break;
 591
 592                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 593                         {
 594                             LPBYTE srcbits = sbits;
 595
 596                             for( y = 0; y < lines; y++) {
 597                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 598                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 599                                                  (((WORD)srcbits[1] << 2) & gmask) |
 600                                                  (((WORD)srcbits[2] << 7) & rmask);
 601
 602                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 603                                 srcbits = (sbits += srcwidthb);
 604                             }
 605                         }
 606                         break;
 607
 608                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 609                         {
 610                             LPDWORD srcbits = (LPDWORD)sbits;
 611                             DWORD val;
 612
 613                             for( y = 0; y < lines; y++) {
 614                                 for( x = 0; x < srcwidth; x++ ) {
 615                                     val = *srcbits++;
 616                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 617                                                        ((val >> 9) & rmask));
 618                                 }
 619                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 620                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 621                             }
 622                         }
 623                         break;
 624
 625                     default: /* ? bit bmp -> 16 bit DIB */
 626                         FIXME("15/16 bit DIB %d bit bitmap\n",
 627                         bmp->bitmap.bmBitsPixel);
 628                         break;
 629                     }
 630                 }
 631                 break;
 632
 633             case 24: /* 24 bpp dstDIB */
 634                 {
 635                     LPBYTE dstbits = dbits;
 636
 637                     switch(bmp->dib->dsBm.bmBitsPixel) {
 638
 639                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 640                         {
 641                             LPWORD srcbits = (LPWORD)sbits;
 642                             WORD val;
 643
 644                             /* FIXME: BI_BITFIELDS not supported yet */
 645                             for( y = 0; y < lines; y++) {
 646                                 for( x = 0; x < srcwidth; x++ ) {
 647                                     val = *srcbits++;
 648                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 649                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 650                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 651                                 }
 652                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 653                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 654                             }
 655                         }
 656                         break;
 657
 658                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 659                         {
 660                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 661                                 memcpy(dbits, sbits, srcwidthb);
 662                         }
 663                         break;
 664
 665                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 666                         {
 667                             LPBYTE srcbits = (LPBYTE)sbits;
 668
 669                             for( y = 0; y < lines; y++) {
 670                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 671                                     *dstbits++ = *srcbits++;
 672                                     *dstbits++ = *srcbits++;
 673                                     *dstbits++ = *srcbits++;
 674                                 }
 675                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 676                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 677                             }
 678                         }
 679                         break;
 680
 681                     default: /* ? bit bmp -> 24 bit DIB */
 682                         FIXME("24 bit DIB %d bit bitmap\n",
 683                               bmp->bitmap.bmBitsPixel);
 684                         break;
 685                     }
 686                 }
 687                 break;
 688
 689             case 32: /* 32 bpp dstDIB */
 690                 {
 691                     LPDWORD dstbits = (LPDWORD)dbits;
 692
 693                     /* FIXME: BI_BITFIELDS not supported yet */
 694
 695                     switch(bmp->dib->dsBm.bmBitsPixel) {
 696                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 697                         {
 698                             LPWORD srcbits = (LPWORD)sbits;
 699                             DWORD val;
 700
 701                             /* FIXME: BI_BITFIELDS not supported yet */
 702                             for( y = 0; y < lines; y++) {
 703                                 for( x = 0; x < srcwidth; x++ ) {
 704                                     val = (DWORD)*srcbits++;
 705                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 706                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 707                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 708                                 }
 709                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 710                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 711                             }
 712                         }
 713                         break;
 714
 715                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 716                         {
 717                             LPBYTE srcbits = sbits;
 718
 719                             for( y = 0; y < lines; y++) {
 720                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 721                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 722                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 723                                 srcbits=(sbits+=srcwidthb);
 724                             }
 725                         }
 726                         break;
 727
 728                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 729                         {
 730                             /* FIXME: BI_BITFIELDS not supported yet */
 731                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 732                                 memcpy(dbits, sbits, srcwidthb);
 733                         }
 734                         break;
 735
 736                     default: /* ? bit bmp -> 16 bit DIB */
 737                         FIXME("15/16 bit DIB %d bit bitmap\n",
 738                         bmp->bitmap.bmBitsPixel);
 739                         break;
 740                     }
 741                 }
 742                 break;
 743
 744             default: /* ? bit DIB */
 745                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 746                 break;
 747             }
 748         }
 749         /* Otherwise, get bits from the XImage */
 750         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
 751         {
 752             GDI_ReleaseObj( hdc );
 753             GDI_ReleaseObj( hbitmap );
 754
 755             return 0;
 756         }
 757     }
 758     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 759     {
 760         /* fill in struct members */
 761
 762         if( info->bmiHeader.biBitCount == 0)
 763         {
 764             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 765             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 766             info->bmiHeader.biPlanes = 1;
 767             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 768             info->bmiHeader.biSizeImage =
 769                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 770                                                    bmp->bitmap.bmHeight,
 771                                                    bmp->bitmap.bmBitsPixel );
 772             info->bmiHeader.biCompression = 0;
 773         }
 774         else
 775         {
 776             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 777                                                info->bmiHeader.biWidth,
 778                                                info->bmiHeader.biHeight,
 779                                                info->bmiHeader.biBitCount );
 780         }
 781     }
 782
 783     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 784           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 785           info->bmiHeader.biHeight);
 786
 787     GDI_ReleaseObj( hdc );
 788     GDI_ReleaseObj( hbitmap );
 789
 790     return lines;
 791 }
 792
 793
 794 /***********************************************************************
 795  *           CreateDIBitmap    (GDI.442)
 796  */
 797 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 798                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 799                             UINT16 coloruse )
 800 {
 801     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 802 }
 803
 804
 805 /***********************************************************************
 806  *           CreateDIBitmap    (GDI32.@)
 807  */
 808 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 809                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 810                             UINT coloruse )
 811 {
 812     HBITMAP handle;
 813     BOOL fColor;
 814     DWORD width;
 815     int height;
 816     WORD bpp;
 817     WORD compr;
 818
 819     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 820     if (height < 0) height = -height;
 821
 822     /* Check if we should create a monochrome or color bitmap. */
 823     /* We create a monochrome bitmap only if it has exactly 2  */
 824     /* colors, which are black followed by white, nothing else.  */
 825     /* In all other cases, we create a color bitmap.           */
 826
 827     if (bpp != 1) fColor = TRUE;
 828     else if ((coloruse != DIB_RGB_COLORS) ||
 829              (init != CBM_INIT) || !data) fColor = FALSE;
 830     else
 831     {
 832         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 833         {
 834             RGBQUAD *rgb = data->bmiColors;
 835             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 836
 837             /* Check if the first color of the colormap is black */
 838             if ((col == RGB(0,0,0)))
 839             {
 840                 rgb++;
 841                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 842                 /* If the second color is white, create a monochrome bitmap */
 843                 fColor =  (col != RGB(0xff,0xff,0xff));
 844             }
 845             /* Note : If the first color of the colormap is white
 846                followed by black, we have to create a color bitmap.
 847                If we don't the white will be displayed in black later on!*/
 848             else fColor = TRUE;
 849         }
 850         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 851         {
 852             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 853             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 854             if ((col == RGB(0,0,0)))
 855             {
 856                 rgb++;
 857                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 858                 fColor = (col != RGB(0xff,0xff,0xff));
 859             }
 860             else fColor = TRUE;
 861         }
 862         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 863         { /* FIXME: correct ? */
 864             RGBQUAD *rgb = data->bmiColors;
 865             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 866
 867             /* Check if the first color of the colormap is black */
 868             if ((col == RGB(0,0,0)))
 869             {
 870                 rgb++;
 871                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 872                 /* If the second color is white, create a monochrome bitmap */
 873                 fColor =  (col != RGB(0xff,0xff,0xff));
 874             }
 875             /* Note : If the first color of the colormap is white
 876                followed by black, we have to create a color bitmap.
 877                If we don't the white will be displayed in black later on!*/
 878             else fColor = TRUE;
 879         }
 880         else
 881         {
 882             ERR("(%ld): wrong/unknown size for data\n",
 883                      data->bmiHeader.biSize );
 884             return 0;
 885         }
 886     }
 887
 888     /* Now create the bitmap */
 889
 890     if (fColor)
 891         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 892                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 893     else handle = CreateBitmap( width, height, 1, 1, NULL );
 894
 895     if (!handle) return 0;
 896
 897     if (init == CBM_INIT)
 898         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 899     return handle;
 900 }
 901
 902 /***********************************************************************
 903  *           CreateDIBSection    (GDI.489)
 904  */
 905 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 906                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 907 {
 908     LPVOID bits32;
 909     HBITMAP hbitmap;
 910
 911     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 912     if (hbitmap)
 913     {
 914         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 915         if (bmp && bmp->dib && bits32)
 916         {
 917             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 918             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 919             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 920             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 921                          bi->biSizeImage : width_bytes * height;
 922
 923             WORD sel = SELECTOR_AllocBlock( bits32, size, WINE_LDT_FLAGS_DATA );
 924             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 925             if (bits16) *bits16 = bmp->segptr_bits;
 926         }
 927         if (bmp) GDI_ReleaseObj( hbitmap );
 928     }
 929     return hbitmap;
 930 }
 931
 932 /***********************************************************************
 933  *           DIB_CreateDIBSection
 934  */
 935 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 936                              LPVOID *bits, HANDLE section,
 937                              DWORD offset, DWORD ovr_pitch)
 938 {
 939     HBITMAP hbitmap = 0;
 940     DC *dc;
 941     BOOL bDesktopDC = FALSE;
 942
 943     /* If the reference hdc is null, take the desktop dc */
 944     if (hdc == 0)
 945     {
 946         hdc = CreateCompatibleDC(0);
 947         bDesktopDC = TRUE;
 948     }
 949
 950     if ((dc = DC_GetDCPtr( hdc )))
 951     {
 952         hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset, ovr_pitch);
 953         GDI_ReleaseObj(hdc);
 954     }
 955
 956     if (bDesktopDC)
 957       DeleteDC(hdc);
 958
 959     return hbitmap;
 960 }
 961
 962 /***********************************************************************
 963  *           CreateDIBSection    (GDI32.@)
 964  */
 965 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 966                                 LPVOID *bits, HANDLE section,
 967                                 DWORD offset)
 968 {
 969     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 970 }
 971
 972 /***********************************************************************
 973  *           DIB_DeleteDIBSection
 974  */
 975 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
 976 {
 977     if (bmp && bmp->dib)
 978     {
 979         DIBSECTION *dib = bmp->dib;
 980
 981         if (dib->dsBm.bmBits)
 982         {
 983             if (dib->dshSection)
 984             {
 985                 SYSTEM_INFO SystemInfo;
 986                 GetSystemInfo( &SystemInfo );
 987                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 988                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 989             }
 990             else if (!dib->dsOffset)
 991                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 992         }
 993
 994         BITMAP_Driver->pDeleteDIBSection(bmp);
 995
 996         HeapFree(GetProcessHeap(), 0, dib);
 997         bmp->dib = NULL;
 998         if (bmp->segptr_bits) SELECTOR_FreeBlock( SELECTOROF(bmp->segptr_bits) );
 999     }
1000 }
1001
1002 /***********************************************************************
1003  *           DIB_CreateDIBFromBitmap
1004  *  Allocates a packed DIB and copies the bitmap data into it.
1005  */
1006 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
1007 {
1008     BITMAPOBJ *pBmp = NULL;
1009     HGLOBAL hPackedDIB = 0;
1010     LPBYTE pPackedDIB = NULL;
1011     LPBITMAPINFOHEADER pbmiHeader = NULL;
1012     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
1013                  OffsetBits = 0, nLinesCopied = 0;
1014
1015     /* Get a pointer to the BITMAPOBJ structure */
1016     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1017     if (!pBmp) return hPackedDIB;
1018
1019     /* Get the bitmap dimensions */
1020     width = pBmp->bitmap.bmWidth;
1021     height = pBmp->bitmap.bmHeight;
1022     depth = pBmp->bitmap.bmBitsPixel;
1023
1024     /*
1025      * A packed DIB contains a BITMAPINFO structure followed immediately by
1026      * an optional color palette and the pixel data.
1027      */
1028
1029     /* Calculate the size of the packed DIB */
1030     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1031     cPackedSize = sizeof(BITMAPINFOHEADER)
1032                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1033                   + cDataSize;
1034     /* Get the offset to the bits */
1035     OffsetBits = cPackedSize - cDataSize;
1036
1037     /* Allocate the packed DIB */
1038     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1039     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1040                              cPackedSize );
1041     if ( !hPackedDIB )
1042     {
1043         WARN("Could not allocate packed DIB!\n");
1044         goto END;
1045     }
1046
1047     /* A packed DIB starts with a BITMAPINFOHEADER */
1048     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1049     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1050
1051     /* Init the BITMAPINFOHEADER */
1052     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1053     pbmiHeader->biWidth = width;
1054     pbmiHeader->biHeight = height;
1055     pbmiHeader->biPlanes = 1;
1056     pbmiHeader->biBitCount = depth;
1057     pbmiHeader->biCompression = BI_RGB;
1058     pbmiHeader->biSizeImage = 0;
1059     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1060     pbmiHeader->biClrUsed = 0;
1061     pbmiHeader->biClrImportant = 0;
1062
1063     /* Retrieve the DIB bits from the bitmap and fill in the
1064      * DIB color table if present */
1065
1066     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1067                              hBmp,                      /* Handle to bitmap */
1068                              0,                         /* First scan line to set in dest bitmap */
1069                              height,                    /* Number of scan lines to copy */
1070                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1071                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1072                              0);                        /* RGB or palette index */
1073     GlobalUnlock(hPackedDIB);
1074
1075     /* Cleanup if GetDIBits failed */
1076     if (nLinesCopied != height)
1077     {
1078         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1079         GlobalFree(hPackedDIB);
1080         hPackedDIB = 0;
1081     }
1082
1083 END:
1084     GDI_ReleaseObj( hBmp );
1085     return hPackedDIB;
1086 }