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     BITMAPOBJ *bitmap;
 268     INT result = 0;
 269
 270     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 271
 272     if (!(dc = DC_GetDCUpdate( hdc )))
 273     {
 274         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 275         GDI_ReleaseObj( hbitmap );
 276         return 0;
 277     }
 278
 279     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 280
 281     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 282         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 283                                             bits, info, coloruse );
 284     else
 285         result = lines;
 286
 287  done:
 288     GDI_ReleaseObj( hdc );
 289     GDI_ReleaseObj( hbitmap );
 290     return result;
 291 }
 292
 293
 294 /***********************************************************************
 295  *           SetDIBitsToDevice    (GDI.443)
 296  */
 297 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 298                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 299                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 300                            UINT16 coloruse )
 301 {
 302     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 303                                 startscan, lines, bits, info, coloruse );
 304 }
 305
 306
 307 /***********************************************************************
 308  *           SetDIBitsToDevice   (GDI32.@)
 309  */
 310 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 311                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 312                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 313                            UINT coloruse )
 314 {
 315     INT ret;
 316     DC *dc;
 317
 318     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 319
 320     if(dc->funcs->pSetDIBitsToDevice)
 321         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 322                                              ySrc, startscan, lines, bits,
 323                                              info, coloruse );
 324     else {
 325         FIXME("unimplemented on hdc %08x\n", hdc);
 326         ret = 0;
 327     }
 328
 329     GDI_ReleaseObj( hdc );
 330     return ret;
 331 }
 332
 333 /***********************************************************************
 334  *           SetDIBColorTable    (GDI.602)
 335  */
 336 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 337                                   RGBQUAD *colors )
 338 {
 339     return SetDIBColorTable( hdc, startpos, entries, colors );
 340 }
 341
 342 /***********************************************************************
 343  *           SetDIBColorTable    (GDI32.@)
 344  */
 345 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 346 {
 347     DC * dc;
 348     UINT result = 0;
 349
 350     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 351
 352     if (dc->funcs->pSetDIBColorTable)
 353         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 354
 355     GDI_ReleaseObj( hdc );
 356     return result;
 357 }
 358
 359 /***********************************************************************
 360  *           GetDIBColorTable    (GDI.603)
 361  */
 362 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 363                                   RGBQUAD *colors )
 364 {
 365     return GetDIBColorTable( hdc, startpos, entries, colors );
 366 }
 367
 368 /***********************************************************************
 369  *           GetDIBColorTable    (GDI32.@)
 370  */
 371 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 372 {
 373     DC * dc;
 374     UINT result = 0;
 375
 376     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 377
 378     if (dc->funcs->pGetDIBColorTable)
 379         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 380
 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
 739         {
 740             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 741             else
 742             {
 743                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 744                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 745                                                     lines, bits, info, coloruse );
 746                 else
 747                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 748             }
 749         }
 750     }
 751     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 752     {
 753         /* fill in struct members */
 754
 755         if( info->bmiHeader.biBitCount == 0)
 756         {
 757             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 758             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 759             info->bmiHeader.biPlanes = 1;
 760             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 761             info->bmiHeader.biSizeImage =
 762                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 763                                                    bmp->bitmap.bmHeight,
 764                                                    bmp->bitmap.bmBitsPixel );
 765             info->bmiHeader.biCompression = 0;
 766         }
 767         else
 768         {
 769             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 770                                                info->bmiHeader.biWidth,
 771                                                info->bmiHeader.biHeight,
 772                                                info->bmiHeader.biBitCount );
 773         }
 774     }
 775
 776     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 777           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 778           info->bmiHeader.biHeight);
 779
 780     GDI_ReleaseObj( hdc );
 781     GDI_ReleaseObj( hbitmap );
 782
 783     return lines;
 784 }
 785
 786
 787 /***********************************************************************
 788  *           CreateDIBitmap    (GDI.442)
 789  */
 790 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 791                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 792                             UINT16 coloruse )
 793 {
 794     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 795 }
 796
 797
 798 /***********************************************************************
 799  *           CreateDIBitmap    (GDI32.@)
 800  */
 801 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 802                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 803                             UINT coloruse )
 804 {
 805     HBITMAP handle;
 806     BOOL fColor;
 807     DWORD width;
 808     int height;
 809     WORD bpp;
 810     WORD compr;
 811     DC *dc;
 812
 813     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 814     if (height < 0) height = -height;
 815
 816     /* Check if we should create a monochrome or color bitmap. */
 817     /* We create a monochrome bitmap only if it has exactly 2  */
 818     /* colors, which are black followed by white, nothing else.  */
 819     /* In all other cases, we create a color bitmap.           */
 820
 821     if (bpp != 1) fColor = TRUE;
 822     else if ((coloruse != DIB_RGB_COLORS) ||
 823              (init != CBM_INIT) || !data) fColor = FALSE;
 824     else
 825     {
 826         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 827         {
 828             RGBQUAD *rgb = data->bmiColors;
 829             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 830
 831             /* Check if the first color of the colormap is black */
 832             if ((col == RGB(0,0,0)))
 833             {
 834                 rgb++;
 835                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 836                 /* If the second color is white, create a monochrome bitmap */
 837                 fColor =  (col != RGB(0xff,0xff,0xff));
 838             }
 839             /* Note : If the first color of the colormap is white
 840                followed by black, we have to create a color bitmap.
 841                If we don't the white will be displayed in black later on!*/
 842             else fColor = TRUE;
 843         }
 844         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 845         {
 846             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 847             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 848             if ((col == RGB(0,0,0)))
 849             {
 850                 rgb++;
 851                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 852                 fColor = (col != RGB(0xff,0xff,0xff));
 853             }
 854             else fColor = TRUE;
 855         }
 856         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 857         { /* FIXME: correct ? */
 858             RGBQUAD *rgb = data->bmiColors;
 859             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 860
 861             /* Check if the first color of the colormap is black */
 862             if ((col == RGB(0,0,0)))
 863             {
 864                 rgb++;
 865                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 866                 /* If the second color is white, create a monochrome bitmap */
 867                 fColor =  (col != RGB(0xff,0xff,0xff));
 868             }
 869             /* Note : If the first color of the colormap is white
 870                followed by black, we have to create a color bitmap.
 871                If we don't the white will be displayed in black later on!*/
 872             else fColor = TRUE;
 873         }
 874         else
 875         {
 876             ERR("(%ld): wrong/unknown size for data\n",
 877                      data->bmiHeader.biSize );
 878             return 0;
 879         }
 880     }
 881
 882     /* Now create the bitmap */
 883
 884     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 885
 886     if (fColor)
 887         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 888                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 889     else handle = CreateBitmap( width, height, 1, 1, NULL );
 890
 891     if (handle)
 892     {
 893         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 894         else if (!BITMAP_SetOwnerDC( handle, dc ))
 895         {
 896             DeleteObject( handle );
 897             handle = 0;
 898         }
 899     }
 900
 901     GDI_ReleaseObj( hdc );
 902     return handle;
 903 }
 904
 905 /***********************************************************************
 906  *           CreateDIBSection    (GDI.489)
 907  */
 908 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 909                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 910 {
 911     LPVOID bits32;
 912     HBITMAP hbitmap;
 913
 914     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 915     if (hbitmap)
 916     {
 917         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 918         if (bmp && bmp->dib && bits32)
 919         {
 920             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 921             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 922             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 923             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 924                          bi->biSizeImage : width_bytes * height;
 925
 926             /* calculate number of sel's needed for size with 64K steps */
 927             WORD count = (size + 0xffff) / 0x10000;
 928             WORD sel = AllocSelectorArray16(count);
 929             int i;
 930
 931             for (i = 0; i < count; i++)
 932             {
 933                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 934                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 935                 size -= 0x10000;
 936             }
 937             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 938             if (bits16) *bits16 = bmp->segptr_bits;
 939         }
 940         if (bmp) GDI_ReleaseObj( hbitmap );
 941     }
 942     return hbitmap;
 943 }
 944
 945 /***********************************************************************
 946  *           DIB_CreateDIBSection
 947  */
 948 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 949                              LPVOID *bits, HANDLE section,
 950                              DWORD offset, DWORD ovr_pitch)
 951 {
 952     HBITMAP hbitmap = 0;
 953     DC *dc;
 954     BOOL bDesktopDC = FALSE;
 955
 956     /* If the reference hdc is null, take the desktop dc */
 957     if (hdc == 0)
 958     {
 959         hdc = CreateCompatibleDC(0);
 960         bDesktopDC = TRUE;
 961     }
 962
 963     if ((dc = DC_GetDCPtr( hdc )))
 964     {
 965         hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 966         GDI_ReleaseObj(hdc);
 967     }
 968
 969     if (bDesktopDC)
 970       DeleteDC(hdc);
 971
 972     return hbitmap;
 973 }
 974
 975 /***********************************************************************
 976  *           CreateDIBSection    (GDI32.@)
 977  */
 978 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 979                                 LPVOID *bits, HANDLE section,
 980                                 DWORD offset)
 981 {
 982     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 983 }
 984
 985 /***********************************************************************
 986  *           DIB_CreateDIBFromBitmap
 987  *  Allocates a packed DIB and copies the bitmap data into it.
 988  */
 989 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 990 {
 991     BITMAPOBJ *pBmp = NULL;
 992     HGLOBAL hPackedDIB = 0;
 993     LPBYTE pPackedDIB = NULL;
 994     LPBITMAPINFOHEADER pbmiHeader = NULL;
 995     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 996                  OffsetBits = 0, nLinesCopied = 0;
 997
 998     /* Get a pointer to the BITMAPOBJ structure */
 999     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1000     if (!pBmp) return hPackedDIB;
1001
1002     /* Get the bitmap dimensions */
1003     width = pBmp->bitmap.bmWidth;
1004     height = pBmp->bitmap.bmHeight;
1005     depth = pBmp->bitmap.bmBitsPixel;
1006
1007     /*
1008      * A packed DIB contains a BITMAPINFO structure followed immediately by
1009      * an optional color palette and the pixel data.
1010      */
1011
1012     /* Calculate the size of the packed DIB */
1013     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1014     cPackedSize = sizeof(BITMAPINFOHEADER)
1015                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1016                   + cDataSize;
1017     /* Get the offset to the bits */
1018     OffsetBits = cPackedSize - cDataSize;
1019
1020     /* Allocate the packed DIB */
1021     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1022     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1023                              cPackedSize );
1024     if ( !hPackedDIB )
1025     {
1026         WARN("Could not allocate packed DIB!\n");
1027         goto END;
1028     }
1029
1030     /* A packed DIB starts with a BITMAPINFOHEADER */
1031     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1032     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1033
1034     /* Init the BITMAPINFOHEADER */
1035     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1036     pbmiHeader->biWidth = width;
1037     pbmiHeader->biHeight = height;
1038     pbmiHeader->biPlanes = 1;
1039     pbmiHeader->biBitCount = depth;
1040     pbmiHeader->biCompression = BI_RGB;
1041     pbmiHeader->biSizeImage = 0;
1042     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1043     pbmiHeader->biClrUsed = 0;
1044     pbmiHeader->biClrImportant = 0;
1045
1046     /* Retrieve the DIB bits from the bitmap and fill in the
1047      * DIB color table if present */
1048
1049     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1050                              hBmp,                      /* Handle to bitmap */
1051                              0,                         /* First scan line to set in dest bitmap */
1052                              height,                    /* Number of scan lines to copy */
1053                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1054                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1055                              0);                        /* RGB or palette index */
1056     GlobalUnlock(hPackedDIB);
1057
1058     /* Cleanup if GetDIBits failed */
1059     if (nLinesCopied != height)
1060     {
1061         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1062         GlobalFree(hPackedDIB);
1063         hPackedDIB = 0;
1064     }
1065
1066 END:
1067     GDI_ReleaseObj( hBmp );
1068     return hPackedDIB;
1069 }