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 "selectors.h"
  15 #include "gdi.h"
  16 #include "debugtools.h"
  17 #include "palette.h"
  18
  19 DEFAULT_DEBUG_CHANNEL(bitmap);
  20
  21 /***********************************************************************
  22  *           DIB_GetDIBWidthBytes
  23  *
  24  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  25  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  26  */
  27 int DIB_GetDIBWidthBytes( int width, int depth )
  28 {
  29     int words;
  30
  31     switch(depth)
  32     {
  33         case 1:  words = (width + 31) / 32; break;
  34         case 4:  words = (width + 7) / 8; break;
  35         case 8:  words = (width + 3) / 4; break;
  36         case 15:
  37         case 16: words = (width + 1) / 2; break;
  38         case 24: words = (width * 3 + 3)/4; break;
  39
  40         default:
  41             WARN("(%d): Unsupported depth\n", depth );
  42         /* fall through */
  43         case 32:
  44                 words = width;
  45     }
  46     return 4 * words;
  47 }
  48
  49 /***********************************************************************
  50  *           DIB_GetDIBImageBytes
  51  *
  52  * Return the number of bytes used to hold the image in a DIB bitmap.
  53  */
  54 int DIB_GetDIBImageBytes( int width, int height, int depth )
  55 {
  56     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  57 }
  58
  59
  60 /***********************************************************************
  61  *           DIB_BitmapInfoSize
  62  *
  63  * Return the size of the bitmap info structure including color table.
  64  */
  65 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  66 {
  67     int colors;
  68
  69     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  70     {
  71         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  72         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  73         return sizeof(BITMAPCOREHEADER) + colors *
  74              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  75     }
  76     else  /* assume BITMAPINFOHEADER */
  77     {
  78         colors = info->bmiHeader.biClrUsed;
  79         if (!colors && (info->bmiHeader.biBitCount <= 8))
  80             colors = 1 << info->bmiHeader.biBitCount;
  81         return sizeof(BITMAPINFOHEADER) + colors *
  82                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  83     }
  84 }
  85
  86
  87 /***********************************************************************
  88  *           DIB_GetBitmapInfo
  89  *
  90  * Get the info from a bitmap header.
  91  * Return 1 for INFOHEADER, 0 for COREHEADER,
  92  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
  93  */
  94 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
  95                               int *height, WORD *bpp, WORD *compr )
  96 {
  97     if (header->biSize == sizeof(BITMAPINFOHEADER))
  98     {
  99         *width  = header->biWidth;
 100         *height = header->biHeight;
 101         *bpp    = header->biBitCount;
 102         *compr  = header->biCompression;
 103         return 1;
 104     }
 105     if (header->biSize == sizeof(BITMAPCOREHEADER))
 106     {
 107         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 108         *width  = core->bcWidth;
 109         *height = core->bcHeight;
 110         *bpp    = core->bcBitCount;
 111         *compr  = 0;
 112         return 0;
 113     }
 114     if (header->biSize == sizeof(BITMAPV4HEADER))
 115     {
 116         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 117         *width  = v4hdr->bV4Width;
 118         *height = v4hdr->bV4Height;
 119         *bpp    = v4hdr->bV4BitCount;
 120         *compr  = v4hdr->bV4Compression;
 121         return 4;
 122     }
 123     if (header->biSize == sizeof(BITMAPV5HEADER))
 124     {
 125         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 126         *width  = v5hdr->bV5Width;
 127         *height = v5hdr->bV5Height;
 128         *bpp    = v5hdr->bV5BitCount;
 129         *compr  = v5hdr->bV5Compression;
 130         return 5;
 131     }
 132     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 133     return -1;
 134 }
 135
 136
 137 /***********************************************************************
 138  *           StretchDIBits   (GDI.439)
 139  */
 140 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
 141                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
 142                        INT16 heightSrc, const VOID *bits,
 143                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
 144 {
 145     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
 146                                    xSrc, ySrc, widthSrc, heightSrc, bits,
 147                                    info, wUsage, dwRop );
 148 }
 149
 150
 151 /***********************************************************************
 152  *           StretchDIBits   (GDI32.@)
 153  */
 154 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 155                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 156                        INT heightSrc, const void *bits,
 157                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 158 {
 159     DC *dc = DC_GetDCUpdate( hdc );
 160     if(!dc) return FALSE;
 161
 162     if(dc->funcs->pStretchDIBits)
 163     {
 164         heightSrc = dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
 165                                               heightDst, xSrc, ySrc, widthSrc,
 166                                               heightSrc, bits, info, wUsage, dwRop);
 167         GDI_ReleaseObj( hdc );
 168     }
 169     else /* use StretchBlt */
 170     {
 171         HBITMAP hBitmap, hOldBitmap;
 172         HDC hdcMem;
 173
 174         GDI_ReleaseObj( hdc );
 175         hdcMem = CreateCompatibleDC( hdc );
 176         if (info->bmiHeader.biCompression == BI_RLE4 ||
 177             info->bmiHeader.biCompression == BI_RLE8) {
 178
 179            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 180             * contain all the rectangle described in bmiHeader, but only part of it.
 181             * This mean that those undescribed pixels must be left untouched.
 182             * So, we first copy on a memory bitmap the current content of the
 183             * destination rectangle, blit the DIB bits on top of it - hence leaving
 184             * the gaps untouched -, and blitting the rectangle back.
 185             * This insure that gaps are untouched on the destination rectangle
 186             * Not doing so leads to trashed images (the gaps contain what was on the
 187             * memory bitmap => generally black or garbage)
 188             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 189             * another speed vs correctness issue. Anyway, if speed is needed, then the
 190             * pStretchDIBits function shall be implemented.
 191             * ericP (2000/09/09)
 192             */
 193            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 194                                             info->bmiHeader.biHeight);
 195            hOldBitmap = SelectObject( hdcMem, hBitmap );
 196
 197            /* copy existing bitmap from destination dc */
 198            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 199                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 200                        dwRop );
 201            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 202                      info, DIB_RGB_COLORS);
 203
 204         } else {
 205            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 206                                      bits, info, wUsage );
 207            hOldBitmap = SelectObject( hdcMem, hBitmap );
 208         }
 209
 210         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 211            left (negative biHeight) */
 212         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 213                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 214                     widthSrc, heightSrc, dwRop );
 215         SelectObject( hdcMem, hOldBitmap );
 216         DeleteDC( hdcMem );
 217         DeleteObject( hBitmap );
 218     }
 219     return heightSrc;
 220 }
 221
 222
 223 /***********************************************************************
 224  *           SetDIBits    (GDI.440)
 225  */
 226 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 227                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 228                           UINT16 coloruse )
 229 {
 230     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 231 }
 232
 233
 234 /******************************************************************************
 235  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 236  *
 237  * PARAMS
 238  *    hdc       [I] Handle to device context
 239  *    hbitmap   [I] Handle to bitmap
 240  *    startscan [I] Starting scan line
 241  *    lines     [I] Number of scan lines
 242  *    bits      [I] Array of bitmap bits
 243  *    info      [I] Address of structure with data
 244  *    coloruse  [I] Type of color indexes to use
 245  *
 246  * RETURNS
 247  *    Success: Number of scan lines copied
 248  *    Failure: 0
 249  */
 250 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 251                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 252                       UINT coloruse )
 253 {
 254     DC *dc;
 255     BITMAPOBJ *bitmap;
 256     INT result;
 257
 258     /* Check parameters */
 259     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 260
 261     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 262     {
 263         GDI_ReleaseObj( hdc );
 264         return 0;
 265     }
 266
 267     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
 268                                        lines, bits, info,
 269                                        coloruse, hbitmap);
 270
 271     GDI_ReleaseObj( hbitmap );
 272     GDI_ReleaseObj( hdc );
 273
 274     return result;
 275 }
 276
 277
 278 /***********************************************************************
 279  *           SetDIBitsToDevice    (GDI.443)
 280  */
 281 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 282                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 283                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 284                            UINT16 coloruse )
 285 {
 286     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 287                                 startscan, lines, bits, info, coloruse );
 288 }
 289
 290
 291 /***********************************************************************
 292  *           SetDIBitsToDevice   (GDI32.@)
 293  */
 294 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 295                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 296                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 297                            UINT coloruse )
 298 {
 299     INT ret;
 300     DC *dc;
 301
 302     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 303
 304     if(dc->funcs->pSetDIBitsToDevice)
 305         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
 306                                              ySrc, startscan, lines, bits,
 307                                              info, coloruse );
 308     else {
 309         FIXME("unimplemented on hdc %08x\n", hdc);
 310         ret = 0;
 311     }
 312
 313     GDI_ReleaseObj( hdc );
 314     return ret;
 315 }
 316
 317 /***********************************************************************
 318  *           SetDIBColorTable    (GDI.602)
 319  */
 320 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 321                                   RGBQUAD *colors )
 322 {
 323     return SetDIBColorTable( hdc, startpos, entries, colors );
 324 }
 325
 326 /***********************************************************************
 327  *           SetDIBColorTable    (GDI32.@)
 328  */
 329 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 330                                   RGBQUAD *colors )
 331 {
 332     DC * dc;
 333     BITMAPOBJ * bmp;
 334     UINT result;
 335
 336     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 337
 338     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 339     {
 340         GDI_ReleaseObj( hdc );
 341         return 0;
 342     }
 343
 344     result = BITMAP_Driver->pSetDIBColorTable(bmp, dc, startpos, entries, colors);
 345
 346     GDI_ReleaseObj( dc->hBitmap );
 347     GDI_ReleaseObj( hdc );
 348     return result;
 349 }
 350
 351 /***********************************************************************
 352  *           GetDIBColorTable    (GDI.603)
 353  */
 354 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 355                                   RGBQUAD *colors )
 356 {
 357     return GetDIBColorTable( hdc, startpos, entries, colors );
 358 }
 359
 360 /***********************************************************************
 361  *           GetDIBColorTable    (GDI32.@)
 362  */
 363 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 364                                   RGBQUAD *colors )
 365 {
 366     DC * dc;
 367     BITMAPOBJ * bmp;
 368     UINT result;
 369
 370     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 371
 372     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 373     {
 374         GDI_ReleaseObj( hdc );
 375         return 0;
 376     }
 377
 378     result = BITMAP_Driver->pGetDIBColorTable(bmp, dc, startpos, entries, colors);
 379
 380     GDI_ReleaseObj( dc->hBitmap );
 381     GDI_ReleaseObj( hdc );
 382     return result;
 383 }
 384
 385 /* FIXME the following two structs should be combined with __sysPalTemplate in
 386    objects/color.c - this should happen after de-X11-ing both of these
 387    files.
 388    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 389    and blue - sigh */
 390
 391 static RGBQUAD EGAColors[16] = {
 392 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 393     { 0x00, 0x00, 0x00, 0x00 },
 394     { 0x00, 0x00, 0x80, 0x00 },
 395     { 0x00, 0x80, 0x00, 0x00 },
 396     { 0x00, 0x80, 0x80, 0x00 },
 397     { 0x80, 0x00, 0x00, 0x00 },
 398     { 0x80, 0x00, 0x80, 0x00 },
 399     { 0x80, 0x80, 0x00, 0x00 },
 400     { 0x80, 0x80, 0x80, 0x00 },
 401     { 0xc0, 0xc0, 0xc0, 0x00 },
 402     { 0x00, 0x00, 0xff, 0x00 },
 403     { 0x00, 0xff, 0x00, 0x00 },
 404     { 0x00, 0xff, 0xff, 0x00 },
 405     { 0xff, 0x00, 0x00, 0x00 },
 406     { 0xff, 0x00, 0xff, 0x00 },
 407     { 0xff, 0xff, 0x00, 0x00 },
 408     { 0xff, 0xff, 0xff, 0x00 }
 409 };
 410
 411
 412 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 413 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 414     { 0x00, 0x00, 0x00, 0x00 },
 415     { 0x00, 0x00, 0x80, 0x00 },
 416     { 0x00, 0x80, 0x00, 0x00 },
 417     { 0x00, 0x80, 0x80, 0x00 },
 418     { 0x80, 0x00, 0x00, 0x00 },
 419     { 0x80, 0x00, 0x80, 0x00 },
 420     { 0x80, 0x80, 0x00, 0x00 },
 421     { 0xc0, 0xc0, 0xc0, 0x00 },
 422     { 0xc0, 0xdc, 0xc0, 0x00 },
 423     { 0xf0, 0xca, 0xa6, 0x00 },
 424     { 0xf0, 0xfb, 0xff, 0x00 },
 425     { 0xa4, 0xa0, 0xa0, 0x00 },
 426     { 0x80, 0x80, 0x80, 0x00 },
 427     { 0x00, 0x00, 0xf0, 0x00 },
 428     { 0x00, 0xff, 0x00, 0x00 },
 429     { 0x00, 0xff, 0xff, 0x00 },
 430     { 0xff, 0x00, 0x00, 0x00 },
 431     { 0xff, 0x00, 0xff, 0x00 },
 432     { 0xff, 0xff, 0x00, 0x00 },
 433     { 0xff, 0xff, 0xff, 0x00 }
 434 };
 435
 436 /***********************************************************************
 437  *           GetDIBits    (GDI.441)
 438  */
 439 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 440                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 441                           UINT16 coloruse )
 442 {
 443     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 444 }
 445
 446
 447 /******************************************************************************
 448  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 449  *
 450  * RETURNS
 451  *    Success: Number of scan lines copied from bitmap
 452  *    Failure: 0
 453  *
 454  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 455  */
 456 INT WINAPI GetDIBits(
 457     HDC hdc,         /* [in]  Handle to device context */
 458     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 459     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 460     UINT lines,      /* [in]  Number of scan lines to copy */
 461     LPVOID bits,       /* [out] Address of array for bitmap bits */
 462     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 463     UINT coloruse)   /* [in]  RGB or palette index */
 464 {
 465     DC * dc;
 466     BITMAPOBJ * bmp;
 467     PALETTEENTRY * palEntry;
 468     PALETTEOBJ * palette;
 469     int i;
 470
 471     if (!info) return 0;
 472     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 473     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 474     {
 475         GDI_ReleaseObj( hdc );
 476         return 0;
 477     }
 478     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 479     {
 480         GDI_ReleaseObj( hdc );
 481         GDI_ReleaseObj( hbitmap );
 482         return 0;
 483     }
 484
 485     /* Transfer color info */
 486
 487     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 488
 489         info->bmiHeader.biClrUsed = 0;
 490
 491         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 492             palEntry = palette->logpalette.palPalEntry;
 493             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 494                 if (coloruse == DIB_RGB_COLORS) {
 495                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 496                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 497                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 498                     info->bmiColors[i].rgbReserved = 0;
 499                 }
 500                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 501             }
 502         } else {
 503             switch (info->bmiHeader.biBitCount) {
 504             case 1:
 505                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 506                   info->bmiColors[0].rgbBlue = 0;
 507                 info->bmiColors[0].rgbReserved = 0;
 508                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 509                   info->bmiColors[1].rgbBlue = 0xff;
 510                 info->bmiColors[1].rgbReserved = 0;
 511                 break;
 512
 513             case 4:
 514                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 515                 break;
 516
 517             case 8:
 518                 {
 519                 INT r, g, b;
 520                 RGBQUAD *color;
 521
 522                 memcpy(info->bmiColors, DefLogPalette,
 523                        10 * sizeof(RGBQUAD));
 524                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 525                        10 * sizeof(RGBQUAD));
 526                 color = info->bmiColors + 10;
 527                 for(r = 0; r <= 5; r++) /* FIXME */
 528                     for(g = 0; g <= 5; g++)
 529                         for(b = 0; b <= 5; b++) {
 530                             color->rgbRed =   (r * 0xff) / 5;
 531                             color->rgbGreen = (g * 0xff) / 5;
 532                             color->rgbBlue =  (b * 0xff) / 5;
 533                             color->rgbReserved = 0;
 534                             color++;
 535                         }
 536                 }
 537             }
 538         }
 539     }
 540
 541     GDI_ReleaseObj( dc->hPalette );
 542
 543     if (bits && lines)
 544     {
 545         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 546         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 547         {
 548             /*FIXME: Only RGB dibs supported for now */
 549             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 550             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 551             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 552             unsigned int x, y;
 553
 554             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 555             {
 556                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 557                 dstwidthb = -dstwidthb;
 558             }
 559
 560             switch( info->bmiHeader.biBitCount ) {
 561
 562             case 15:
 563             case 16: /* 16 bpp dstDIB */
 564                 {
 565                     LPWORD dstbits = (LPWORD)dbits;
 566                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 567
 568                     /* FIXME: BI_BITFIELDS not supported yet */
 569
 570                     switch(bmp->dib->dsBm.bmBitsPixel) {
 571
 572                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 573                         {
 574                             /* FIXME: BI_BITFIELDS not supported yet */
 575                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 576                                 memcpy(dbits, sbits, srcwidthb);
 577                         }
 578                         break;
 579
 580                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 581                         {
 582                             LPBYTE srcbits = sbits;
 583
 584                             for( y = 0; y < lines; y++) {
 585                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 586                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 587                                                  (((WORD)srcbits[1] << 2) & gmask) |
 588                                                  (((WORD)srcbits[2] << 7) & rmask);
 589
 590                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 591                                 srcbits = (sbits += srcwidthb);
 592                             }
 593                         }
 594                         break;
 595
 596                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 597                         {
 598                             LPDWORD srcbits = (LPDWORD)sbits;
 599                             DWORD val;
 600
 601                             for( y = 0; y < lines; y++) {
 602                                 for( x = 0; x < srcwidth; x++ ) {
 603                                     val = *srcbits++;
 604                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 605                                                        ((val >> 9) & rmask));
 606                                 }
 607                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 608                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 609                             }
 610                         }
 611                         break;
 612
 613                     default: /* ? bit bmp -> 16 bit DIB */
 614                         FIXME("15/16 bit DIB %d bit bitmap\n",
 615                         bmp->bitmap.bmBitsPixel);
 616                         break;
 617                     }
 618                 }
 619                 break;
 620
 621             case 24: /* 24 bpp dstDIB */
 622                 {
 623                     LPBYTE dstbits = dbits;
 624
 625                     switch(bmp->dib->dsBm.bmBitsPixel) {
 626
 627                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 628                         {
 629                             LPWORD srcbits = (LPWORD)sbits;
 630                             WORD val;
 631
 632                             /* FIXME: BI_BITFIELDS not supported yet */
 633                             for( y = 0; y < lines; y++) {
 634                                 for( x = 0; x < srcwidth; x++ ) {
 635                                     val = *srcbits++;
 636                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 637                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 638                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 639                                 }
 640                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 641                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 642                             }
 643                         }
 644                         break;
 645
 646                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 647                         {
 648                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 649                                 memcpy(dbits, sbits, srcwidthb);
 650                         }
 651                         break;
 652
 653                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 654                         {
 655                             LPBYTE srcbits = (LPBYTE)sbits;
 656
 657                             for( y = 0; y < lines; y++) {
 658                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 659                                     *dstbits++ = *srcbits++;
 660                                     *dstbits++ = *srcbits++;
 661                                     *dstbits++ = *srcbits++;
 662                                 }
 663                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 664                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 665                             }
 666                         }
 667                         break;
 668
 669                     default: /* ? bit bmp -> 24 bit DIB */
 670                         FIXME("24 bit DIB %d bit bitmap\n",
 671                               bmp->bitmap.bmBitsPixel);
 672                         break;
 673                     }
 674                 }
 675                 break;
 676
 677             case 32: /* 32 bpp dstDIB */
 678                 {
 679                     LPDWORD dstbits = (LPDWORD)dbits;
 680
 681                     /* FIXME: BI_BITFIELDS not supported yet */
 682
 683                     switch(bmp->dib->dsBm.bmBitsPixel) {
 684                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 685                         {
 686                             LPWORD srcbits = (LPWORD)sbits;
 687                             DWORD val;
 688
 689                             /* FIXME: BI_BITFIELDS not supported yet */
 690                             for( y = 0; y < lines; y++) {
 691                                 for( x = 0; x < srcwidth; x++ ) {
 692                                     val = (DWORD)*srcbits++;
 693                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 694                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 695                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 696                                 }
 697                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 698                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 699                             }
 700                         }
 701                         break;
 702
 703                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 704                         {
 705                             LPBYTE srcbits = sbits;
 706
 707                             for( y = 0; y < lines; y++) {
 708                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 709                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 710                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 711                                 srcbits=(sbits+=srcwidthb);
 712                             }
 713                         }
 714                         break;
 715
 716                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 717                         {
 718                             /* FIXME: BI_BITFIELDS not supported yet */
 719                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 720                                 memcpy(dbits, sbits, srcwidthb);
 721                         }
 722                         break;
 723
 724                     default: /* ? bit bmp -> 16 bit DIB */
 725                         FIXME("15/16 bit DIB %d bit bitmap\n",
 726                         bmp->bitmap.bmBitsPixel);
 727                         break;
 728                     }
 729                 }
 730                 break;
 731
 732             default: /* ? bit DIB */
 733                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 734                 break;
 735             }
 736         }
 737         /* Otherwise, get bits from the XImage */
 738         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
 739         {
 740             GDI_ReleaseObj( hdc );
 741             GDI_ReleaseObj( hbitmap );
 742
 743             return 0;
 744         }
 745     }
 746     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 747     {
 748         /* fill in struct members */
 749
 750         if( info->bmiHeader.biBitCount == 0)
 751         {
 752             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 753             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 754             info->bmiHeader.biPlanes = 1;
 755             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 756             info->bmiHeader.biSizeImage =
 757                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 758                                                    bmp->bitmap.bmHeight,
 759                                                    bmp->bitmap.bmBitsPixel );
 760             info->bmiHeader.biCompression = 0;
 761         }
 762         else
 763         {
 764             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 765                                                info->bmiHeader.biWidth,
 766                                                info->bmiHeader.biHeight,
 767                                                info->bmiHeader.biBitCount );
 768         }
 769     }
 770
 771     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 772           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 773           info->bmiHeader.biHeight);
 774
 775     GDI_ReleaseObj( hdc );
 776     GDI_ReleaseObj( hbitmap );
 777
 778     return lines;
 779 }
 780
 781
 782 /***********************************************************************
 783  *           CreateDIBitmap    (GDI.442)
 784  */
 785 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 786                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 787                             UINT16 coloruse )
 788 {
 789     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 790 }
 791
 792
 793 /***********************************************************************
 794  *           CreateDIBitmap    (GDI32.@)
 795  */
 796 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 797                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 798                             UINT coloruse )
 799 {
 800     HBITMAP handle;
 801     BOOL fColor;
 802     DWORD width;
 803     int height;
 804     WORD bpp;
 805     WORD compr;
 806
 807     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 808     if (height < 0) height = -height;
 809
 810     /* Check if we should create a monochrome or color bitmap. */
 811     /* We create a monochrome bitmap only if it has exactly 2  */
 812     /* colors, which are black followed by white, nothing else.  */
 813     /* In all other cases, we create a color bitmap.           */
 814
 815     if (bpp != 1) fColor = TRUE;
 816     else if ((coloruse != DIB_RGB_COLORS) ||
 817              (init != CBM_INIT) || !data) fColor = FALSE;
 818     else
 819     {
 820         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 821         {
 822             RGBQUAD *rgb = data->bmiColors;
 823             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 824
 825             /* Check if the first color of the colormap is black */
 826             if ((col == RGB(0,0,0)))
 827             {
 828                 rgb++;
 829                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 830                 /* If the second color is white, create a monochrome bitmap */
 831                 fColor =  (col != RGB(0xff,0xff,0xff));
 832             }
 833             /* Note : If the first color of the colormap is white
 834                followed by black, we have to create a color bitmap.
 835                If we don't the white will be displayed in black later on!*/
 836             else fColor = TRUE;
 837         }
 838         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 839         {
 840             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 841             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 842             if ((col == RGB(0,0,0)))
 843             {
 844                 rgb++;
 845                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 846                 fColor = (col != RGB(0xff,0xff,0xff));
 847             }
 848             else fColor = TRUE;
 849         }
 850         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 851         { /* FIXME: correct ? */
 852             RGBQUAD *rgb = data->bmiColors;
 853             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 854
 855             /* Check if the first color of the colormap is black */
 856             if ((col == RGB(0,0,0)))
 857             {
 858                 rgb++;
 859                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 860                 /* If the second color is white, create a monochrome bitmap */
 861                 fColor =  (col != RGB(0xff,0xff,0xff));
 862             }
 863             /* Note : If the first color of the colormap is white
 864                followed by black, we have to create a color bitmap.
 865                If we don't the white will be displayed in black later on!*/
 866             else fColor = TRUE;
 867         }
 868         else
 869         {
 870             ERR("(%ld): wrong/unknown size for data\n",
 871                      data->bmiHeader.biSize );
 872             return 0;
 873         }
 874     }
 875
 876     /* Now create the bitmap */
 877
 878     if (fColor)
 879         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 880                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 881     else handle = CreateBitmap( width, height, 1, 1, NULL );
 882
 883     if (!handle) return 0;
 884
 885     if (init == CBM_INIT)
 886         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 887     return handle;
 888 }
 889
 890 /***********************************************************************
 891  *           CreateDIBSection    (GDI.489)
 892  */
 893 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 894                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 895 {
 896     LPVOID bits32;
 897     HBITMAP hbitmap;
 898
 899     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 900     if (hbitmap)
 901     {
 902         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 903         if (bmp && bmp->dib && bits32)
 904         {
 905             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 906             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 907             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 908             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 909                          bi->biSizeImage : width_bytes * height;
 910
 911             WORD sel = SELECTOR_AllocBlock( bits32, size, WINE_LDT_FLAGS_DATA );
 912             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 913             if (bits16) *bits16 = bmp->segptr_bits;
 914         }
 915         if (bmp) GDI_ReleaseObj( hbitmap );
 916     }
 917     return hbitmap;
 918 }
 919
 920 /***********************************************************************
 921  *           DIB_CreateDIBSection
 922  */
 923 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 924                              LPVOID *bits, HANDLE section,
 925                              DWORD offset, DWORD ovr_pitch)
 926 {
 927     HBITMAP hbitmap = 0;
 928     DC *dc;
 929     BOOL bDesktopDC = FALSE;
 930
 931     /* If the reference hdc is null, take the desktop dc */
 932     if (hdc == 0)
 933     {
 934         hdc = CreateCompatibleDC(0);
 935         bDesktopDC = TRUE;
 936     }
 937
 938     if ((dc = DC_GetDCPtr( hdc )))
 939     {
 940         hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset, ovr_pitch);
 941         GDI_ReleaseObj(hdc);
 942     }
 943
 944     if (bDesktopDC)
 945       DeleteDC(hdc);
 946
 947     return hbitmap;
 948 }
 949
 950 /***********************************************************************
 951  *           CreateDIBSection    (GDI32.@)
 952  */
 953 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 954                                 LPVOID *bits, HANDLE section,
 955                                 DWORD offset)
 956 {
 957     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 958 }
 959
 960 /***********************************************************************
 961  *           DIB_DeleteDIBSection
 962  */
 963 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
 964 {
 965     if (bmp && bmp->dib)
 966     {
 967         DIBSECTION *dib = bmp->dib;
 968
 969         if (dib->dsBm.bmBits)
 970         {
 971             if (dib->dshSection)
 972             {
 973                 SYSTEM_INFO SystemInfo;
 974                 GetSystemInfo( &SystemInfo );
 975                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 976                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 977             }
 978             else if (!dib->dsOffset)
 979                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 980         }
 981
 982         BITMAP_Driver->pDeleteDIBSection(bmp);
 983
 984         HeapFree(GetProcessHeap(), 0, dib);
 985         bmp->dib = NULL;
 986         if (bmp->segptr_bits) SELECTOR_FreeBlock( SELECTOROF(bmp->segptr_bits) );
 987     }
 988 }
 989
 990 /***********************************************************************
 991  *           DIB_CreateDIBFromBitmap
 992  *  Allocates a packed DIB and copies the bitmap data into it.
 993  */
 994 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 995 {
 996     BITMAPOBJ *pBmp = NULL;
 997     HGLOBAL hPackedDIB = 0;
 998     LPBYTE pPackedDIB = NULL;
 999     LPBITMAPINFOHEADER pbmiHeader = NULL;
1000     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
1001                  OffsetBits = 0, nLinesCopied = 0;
1002
1003     /* Get a pointer to the BITMAPOBJ structure */
1004     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1005     if (!pBmp) return hPackedDIB;
1006
1007     /* Get the bitmap dimensions */
1008     width = pBmp->bitmap.bmWidth;
1009     height = pBmp->bitmap.bmHeight;
1010     depth = pBmp->bitmap.bmBitsPixel;
1011
1012     /*
1013      * A packed DIB contains a BITMAPINFO structure followed immediately by
1014      * an optional color palette and the pixel data.
1015      */
1016
1017     /* Calculate the size of the packed DIB */
1018     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1019     cPackedSize = sizeof(BITMAPINFOHEADER)
1020                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1021                   + cDataSize;
1022     /* Get the offset to the bits */
1023     OffsetBits = cPackedSize - cDataSize;
1024
1025     /* Allocate the packed DIB */
1026     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1027     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1028                              cPackedSize );
1029     if ( !hPackedDIB )
1030     {
1031         WARN("Could not allocate packed DIB!\n");
1032         goto END;
1033     }
1034
1035     /* A packed DIB starts with a BITMAPINFOHEADER */
1036     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1037     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1038
1039     /* Init the BITMAPINFOHEADER */
1040     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1041     pbmiHeader->biWidth = width;
1042     pbmiHeader->biHeight = height;
1043     pbmiHeader->biPlanes = 1;
1044     pbmiHeader->biBitCount = depth;
1045     pbmiHeader->biCompression = BI_RGB;
1046     pbmiHeader->biSizeImage = 0;
1047     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1048     pbmiHeader->biClrUsed = 0;
1049     pbmiHeader->biClrImportant = 0;
1050
1051     /* Retrieve the DIB bits from the bitmap and fill in the
1052      * DIB color table if present */
1053
1054     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1055                              hBmp,                      /* Handle to bitmap */
1056                              0,                         /* First scan line to set in dest bitmap */
1057                              height,                    /* Number of scan lines to copy */
1058                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1059                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1060                              0);                        /* RGB or palette index */
1061     GlobalUnlock(hPackedDIB);
1062
1063     /* Cleanup if GetDIBits failed */
1064     if (nLinesCopied != height)
1065     {
1066         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1067         GlobalFree(hPackedDIB);
1068         hPackedDIB = 0;
1069     }
1070
1071 END:
1072     GDI_ReleaseObj( hBmp );
1073     return hPackedDIB;
1074 }