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 <stdarg.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "bitmap.h"
  28 #include "selectors.h"
  29 #include "gdi.h"
  30 #include "wownt32.h"
  31 #include "wine/debug.h"
  32 #include "palette.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  35
  36 /***********************************************************************
  37  *           DIB_GetDIBWidthBytes
  38  *
  39  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  40  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  41  */
  42 int DIB_GetDIBWidthBytes( int width, int depth )
  43 {
  44     int words;
  45
  46     switch(depth)
  47     {
  48         case 1:  words = (width + 31) / 32; break;
  49         case 4:  words = (width + 7) / 8; break;
  50         case 8:  words = (width + 3) / 4; break;
  51         case 15:
  52         case 16: words = (width + 1) / 2; break;
  53         case 24: words = (width * 3 + 3)/4; break;
  54
  55         default:
  56             WARN("(%d): Unsupported depth\n", depth );
  57         /* fall through */
  58         case 32:
  59                 words = width;
  60     }
  61     return 4 * words;
  62 }
  63
  64 /***********************************************************************
  65  *           DIB_GetDIBImageBytes
  66  *
  67  * Return the number of bytes used to hold the image in a DIB bitmap.
  68  */
  69 int DIB_GetDIBImageBytes( int width, int height, int depth )
  70 {
  71     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  72 }
  73
  74
  75 /***********************************************************************
  76  *           DIB_BitmapInfoSize
  77  *
  78  * Return the size of the bitmap info structure including color table.
  79  */
  80 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  81 {
  82     int colors;
  83
  84     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  85     {
  86         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  87         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  88         return sizeof(BITMAPCOREHEADER) + colors *
  89              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  90     }
  91     else  /* assume BITMAPINFOHEADER */
  92     {
  93         colors = info->bmiHeader.biClrUsed;
  94         if (!colors && (info->bmiHeader.biBitCount <= 8))
  95             colors = 1 << info->bmiHeader.biBitCount;
  96         return sizeof(BITMAPINFOHEADER) + colors *
  97                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  98     }
  99 }
 100
 101
 102 /***********************************************************************
 103  *           DIB_GetBitmapInfo
 104  *
 105  * Get the info from a bitmap header.
 106  * Return 1 for INFOHEADER, 0 for COREHEADER,
 107  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
 108  */
 109 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
 110                               int *height, WORD *bpp, WORD *compr )
 111 {
 112     if (header->biSize == sizeof(BITMAPINFOHEADER))
 113     {
 114         *width  = header->biWidth;
 115         *height = header->biHeight;
 116         *bpp    = header->biBitCount;
 117         *compr  = header->biCompression;
 118         return 1;
 119     }
 120     if (header->biSize == sizeof(BITMAPCOREHEADER))
 121     {
 122         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 123         *width  = core->bcWidth;
 124         *height = core->bcHeight;
 125         *bpp    = core->bcBitCount;
 126         *compr  = 0;
 127         return 0;
 128     }
 129     if (header->biSize == sizeof(BITMAPV4HEADER))
 130     {
 131         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 132         *width  = v4hdr->bV4Width;
 133         *height = v4hdr->bV4Height;
 134         *bpp    = v4hdr->bV4BitCount;
 135         *compr  = v4hdr->bV4V4Compression;
 136         return 4;
 137     }
 138     if (header->biSize == sizeof(BITMAPV5HEADER))
 139     {
 140         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 141         *width  = v5hdr->bV5Width;
 142         *height = v5hdr->bV5Height;
 143         *bpp    = v5hdr->bV5BitCount;
 144         *compr  = v5hdr->bV5Compression;
 145         return 5;
 146     }
 147     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 148     return -1;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           StretchDIBits   (GDI32.@)
 154  */
 155 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 156                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 157                        INT heightSrc, const void *bits,
 158                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 159 {
 160     DC *dc;
 161
 162     if (!bits || !info)
 163         return 0;
 164
 165     dc = DC_GetDCUpdate( hdc );
 166     if(!dc) return FALSE;
 167
 168     if(dc->funcs->pStretchDIBits)
 169     {
 170         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 171                                               heightDst, xSrc, ySrc, widthSrc,
 172                                               heightSrc, bits, info, wUsage, dwRop);
 173         GDI_ReleaseObj( hdc );
 174     }
 175     else /* use StretchBlt */
 176     {
 177         HBITMAP hBitmap, hOldBitmap;
 178         HDC hdcMem;
 179
 180         GDI_ReleaseObj( hdc );
 181         hdcMem = CreateCompatibleDC( hdc );
 182         if (info->bmiHeader.biCompression == BI_RLE4 ||
 183             info->bmiHeader.biCompression == BI_RLE8) {
 184
 185            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 186             * contain all the rectangle described in bmiHeader, but only part of it.
 187             * This mean that those undescribed pixels must be left untouched.
 188             * So, we first copy on a memory bitmap the current content of the
 189             * destination rectangle, blit the DIB bits on top of it - hence leaving
 190             * the gaps untouched -, and blitting the rectangle back.
 191             * This insure that gaps are untouched on the destination rectangle
 192             * Not doing so leads to trashed images (the gaps contain what was on the
 193             * memory bitmap => generally black or garbage)
 194             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 195             * another speed vs correctness issue. Anyway, if speed is needed, then the
 196             * pStretchDIBits function shall be implemented.
 197             * ericP (2000/09/09)
 198             */
 199            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 200                                             info->bmiHeader.biHeight);
 201            hOldBitmap = SelectObject( hdcMem, hBitmap );
 202
 203            /* copy existing bitmap from destination dc */
 204            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 205                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 206                        dwRop );
 207            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 208                      info, DIB_RGB_COLORS);
 209
 210         } else {
 211            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 212                                      bits, info, wUsage );
 213            hOldBitmap = SelectObject( hdcMem, hBitmap );
 214         }
 215
 216         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 217            left (negative biHeight) */
 218         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 219                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 220                     widthSrc, heightSrc, dwRop );
 221         SelectObject( hdcMem, hOldBitmap );
 222         DeleteDC( hdcMem );
 223         DeleteObject( hBitmap );
 224     }
 225     return heightSrc;
 226 }
 227
 228
 229 /******************************************************************************
 230  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 231  *
 232  * PARAMS
 233  *    hdc       [I] Handle to device context
 234  *    hbitmap   [I] Handle to bitmap
 235  *    startscan [I] Starting scan line
 236  *    lines     [I] Number of scan lines
 237  *    bits      [I] Array of bitmap bits
 238  *    info      [I] Address of structure with data
 239  *    coloruse  [I] Type of color indexes to use
 240  *
 241  * RETURNS
 242  *    Success: Number of scan lines copied
 243  *    Failure: 0
 244  */
 245 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 246                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 247                       UINT coloruse )
 248 {
 249     DC *dc;
 250     BITMAPOBJ *bitmap;
 251     INT result = 0;
 252
 253     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 254
 255     if (!(dc = DC_GetDCUpdate( hdc )))
 256     {
 257         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 258         GDI_ReleaseObj( hbitmap );
 259         return 0;
 260     }
 261
 262     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 263
 264     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 265         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 266                                             bits, info, coloruse );
 267     else
 268         result = lines;
 269
 270  done:
 271     GDI_ReleaseObj( hdc );
 272     GDI_ReleaseObj( hbitmap );
 273     return result;
 274 }
 275
 276
 277 /***********************************************************************
 278  *           SetDIBitsToDevice   (GDI32.@)
 279  */
 280 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 281                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 282                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 283                            UINT coloruse )
 284 {
 285     INT ret;
 286     DC *dc;
 287
 288     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 289
 290     if(dc->funcs->pSetDIBitsToDevice)
 291         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 292                                              ySrc, startscan, lines, bits,
 293                                              info, coloruse );
 294     else {
 295         FIXME("unimplemented on hdc %p\n", hdc);
 296         ret = 0;
 297     }
 298
 299     GDI_ReleaseObj( hdc );
 300     return ret;
 301 }
 302
 303 /***********************************************************************
 304  *           SetDIBColorTable    (GDI32.@)
 305  */
 306 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 307 {
 308     DC * dc;
 309     UINT result = 0;
 310
 311     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 312
 313     if (dc->funcs->pSetDIBColorTable)
 314         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 315
 316     GDI_ReleaseObj( hdc );
 317     return result;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           GetDIBColorTable    (GDI32.@)
 323  */
 324 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 325 {
 326     DC * dc;
 327     UINT result = 0;
 328
 329     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 330
 331     if (dc->funcs->pGetDIBColorTable)
 332         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 333
 334     GDI_ReleaseObj( hdc );
 335     return result;
 336 }
 337
 338 /* FIXME the following two structs should be combined with __sysPalTemplate in
 339    objects/color.c - this should happen after de-X11-ing both of these
 340    files.
 341    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 342    and blue - sigh */
 343
 344 static RGBQUAD EGAColors[16] = {
 345 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 346     { 0x00, 0x00, 0x00, 0x00 },
 347     { 0x00, 0x00, 0x80, 0x00 },
 348     { 0x00, 0x80, 0x00, 0x00 },
 349     { 0x00, 0x80, 0x80, 0x00 },
 350     { 0x80, 0x00, 0x00, 0x00 },
 351     { 0x80, 0x00, 0x80, 0x00 },
 352     { 0x80, 0x80, 0x00, 0x00 },
 353     { 0x80, 0x80, 0x80, 0x00 },
 354     { 0xc0, 0xc0, 0xc0, 0x00 },
 355     { 0x00, 0x00, 0xff, 0x00 },
 356     { 0x00, 0xff, 0x00, 0x00 },
 357     { 0x00, 0xff, 0xff, 0x00 },
 358     { 0xff, 0x00, 0x00, 0x00 },
 359     { 0xff, 0x00, 0xff, 0x00 },
 360     { 0xff, 0xff, 0x00, 0x00 },
 361     { 0xff, 0xff, 0xff, 0x00 }
 362 };
 363
 364
 365 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 366 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 367     { 0x00, 0x00, 0x00, 0x00 },
 368     { 0x00, 0x00, 0x80, 0x00 },
 369     { 0x00, 0x80, 0x00, 0x00 },
 370     { 0x00, 0x80, 0x80, 0x00 },
 371     { 0x80, 0x00, 0x00, 0x00 },
 372     { 0x80, 0x00, 0x80, 0x00 },
 373     { 0x80, 0x80, 0x00, 0x00 },
 374     { 0xc0, 0xc0, 0xc0, 0x00 },
 375     { 0xc0, 0xdc, 0xc0, 0x00 },
 376     { 0xf0, 0xca, 0xa6, 0x00 },
 377     { 0xf0, 0xfb, 0xff, 0x00 },
 378     { 0xa4, 0xa0, 0xa0, 0x00 },
 379     { 0x80, 0x80, 0x80, 0x00 },
 380     { 0x00, 0x00, 0xf0, 0x00 },
 381     { 0x00, 0xff, 0x00, 0x00 },
 382     { 0x00, 0xff, 0xff, 0x00 },
 383     { 0xff, 0x00, 0x00, 0x00 },
 384     { 0xff, 0x00, 0xff, 0x00 },
 385     { 0xff, 0xff, 0x00, 0x00 },
 386     { 0xff, 0xff, 0xff, 0x00 }
 387 };
 388
 389
 390 /******************************************************************************
 391  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 392  *
 393  * RETURNS
 394  *    Success: Number of scan lines copied from bitmap
 395  *    Failure: 0
 396  *
 397  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 398  */
 399 INT WINAPI GetDIBits(
 400     HDC hdc,         /* [in]  Handle to device context */
 401     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 402     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 403     UINT lines,      /* [in]  Number of scan lines to copy */
 404     LPVOID bits,       /* [out] Address of array for bitmap bits */
 405     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 406     UINT coloruse)   /* [in]  RGB or palette index */
 407 {
 408     DC * dc;
 409     BITMAPOBJ * bmp;
 410     int i;
 411
 412     if (!info) return 0;
 413     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 414     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 415     {
 416         GDI_ReleaseObj( hdc );
 417         return 0;
 418     }
 419
 420     /* Transfer color info */
 421
 422     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 423
 424         info->bmiHeader.biClrUsed = 0;
 425
 426         /* If the bitmap object already has a dib section at the
 427            same color depth then get the color map from it */
 428         if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
 429             GetDIBColorTable(hdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
 430         }
 431         else {
 432             if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 433                 /* Generate the color map from the selected palette */
 434                 PALETTEENTRY * palEntry;
 435                 PALETTEOBJ * palette;
 436                 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
 437                     GDI_ReleaseObj( hdc );
 438                     GDI_ReleaseObj( hbitmap );
 439                     return 0;
 440                 }
 441                 palEntry = palette->logpalette.palPalEntry;
 442                 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 443                     if (coloruse == DIB_RGB_COLORS) {
 444                         info->bmiColors[i].rgbRed      = palEntry->peRed;
 445                         info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 446                         info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 447                         info->bmiColors[i].rgbReserved = 0;
 448                     }
 449                     else ((WORD *)info->bmiColors)[i] = (WORD)i;
 450                 }
 451                 GDI_ReleaseObj( dc->hPalette );
 452             } else {
 453                 switch (info->bmiHeader.biBitCount) {
 454                 case 1:
 455                     info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 456                         info->bmiColors[0].rgbBlue = 0;
 457                     info->bmiColors[0].rgbReserved = 0;
 458                     info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 459                         info->bmiColors[1].rgbBlue = 0xff;
 460                     info->bmiColors[1].rgbReserved = 0;
 461                     break;
 462
 463                 case 4:
 464                     memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 465                     break;
 466
 467                 case 8:
 468                     {
 469                         INT r, g, b;
 470                         RGBQUAD *color;
 471
 472                         memcpy(info->bmiColors, DefLogPalette,
 473                                10 * sizeof(RGBQUAD));
 474                         memcpy(info->bmiColors + 246, DefLogPalette + 10,
 475                                10 * sizeof(RGBQUAD));
 476                         color = info->bmiColors + 10;
 477                         for(r = 0; r <= 5; r++) /* FIXME */
 478                             for(g = 0; g <= 5; g++)
 479                                 for(b = 0; b <= 5; b++) {
 480                                     color->rgbRed =   (r * 0xff) / 5;
 481                                     color->rgbGreen = (g * 0xff) / 5;
 482                                     color->rgbBlue =  (b * 0xff) / 5;
 483                                     color->rgbReserved = 0;
 484                                     color++;
 485                                 }
 486                     }
 487                 }
 488             }
 489         }
 490     }
 491
 492     if (bits && lines)
 493     {
 494         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 495         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 496         {
 497             /*FIXME: Only RGB dibs supported for now */
 498             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 499             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 500             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 501             unsigned int x, y;
 502
 503             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 504             {
 505                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 506                 dstwidthb = -dstwidthb;
 507             }
 508
 509             switch( info->bmiHeader.biBitCount ) {
 510
 511             case 15:
 512             case 16: /* 16 bpp dstDIB */
 513                 {
 514                     LPWORD dstbits = (LPWORD)dbits;
 515                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 516
 517                     /* FIXME: BI_BITFIELDS not supported yet */
 518
 519                     switch(bmp->dib->dsBm.bmBitsPixel) {
 520
 521                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 522                         {
 523                             /* FIXME: BI_BITFIELDS not supported yet */
 524                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 525                                 memcpy(dbits, sbits, srcwidthb);
 526                         }
 527                         break;
 528
 529                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 530                         {
 531                             LPBYTE srcbits = sbits;
 532
 533                             for( y = 0; y < lines; y++) {
 534                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 535                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 536                                                  (((WORD)srcbits[1] << 2) & gmask) |
 537                                                  (((WORD)srcbits[2] << 7) & rmask);
 538
 539                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 540                                 srcbits = (sbits += srcwidthb);
 541                             }
 542                         }
 543                         break;
 544
 545                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 546                         {
 547                             LPDWORD srcbits = (LPDWORD)sbits;
 548                             DWORD val;
 549
 550                             for( y = 0; y < lines; y++) {
 551                                 for( x = 0; x < srcwidth; x++ ) {
 552                                     val = *srcbits++;
 553                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 554                                                        ((val >> 9) & rmask));
 555                                 }
 556                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 557                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 558                             }
 559                         }
 560                         break;
 561
 562                     default: /* ? bit bmp -> 16 bit DIB */
 563                         FIXME("15/16 bit DIB %d bit bitmap\n",
 564                         bmp->bitmap.bmBitsPixel);
 565                         break;
 566                     }
 567                 }
 568                 break;
 569
 570             case 24: /* 24 bpp dstDIB */
 571                 {
 572                     LPBYTE dstbits = dbits;
 573
 574                     switch(bmp->dib->dsBm.bmBitsPixel) {
 575
 576                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 577                         {
 578                             LPWORD srcbits = (LPWORD)sbits;
 579                             WORD val;
 580
 581                             /* FIXME: BI_BITFIELDS not supported yet */
 582                             for( y = 0; y < lines; y++) {
 583                                 for( x = 0; x < srcwidth; x++ ) {
 584                                     val = *srcbits++;
 585                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 586                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 587                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 588                                 }
 589                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 590                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 591                             }
 592                         }
 593                         break;
 594
 595                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 596                         {
 597                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 598                                 memcpy(dbits, sbits, srcwidthb);
 599                         }
 600                         break;
 601
 602                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 603                         {
 604                             LPBYTE srcbits = (LPBYTE)sbits;
 605
 606                             for( y = 0; y < lines; y++) {
 607                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 608                                     *dstbits++ = *srcbits++;
 609                                     *dstbits++ = *srcbits++;
 610                                     *dstbits++ = *srcbits++;
 611                                 }
 612                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 613                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 614                             }
 615                         }
 616                         break;
 617
 618                     default: /* ? bit bmp -> 24 bit DIB */
 619                         FIXME("24 bit DIB %d bit bitmap\n",
 620                               bmp->bitmap.bmBitsPixel);
 621                         break;
 622                     }
 623                 }
 624                 break;
 625
 626             case 32: /* 32 bpp dstDIB */
 627                 {
 628                     LPDWORD dstbits = (LPDWORD)dbits;
 629
 630                     /* FIXME: BI_BITFIELDS not supported yet */
 631
 632                     switch(bmp->dib->dsBm.bmBitsPixel) {
 633                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 634                         {
 635                             LPWORD srcbits = (LPWORD)sbits;
 636                             DWORD val;
 637
 638                             /* FIXME: BI_BITFIELDS not supported yet */
 639                             for( y = 0; y < lines; y++) {
 640                                 for( x = 0; x < srcwidth; x++ ) {
 641                                     val = (DWORD)*srcbits++;
 642                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 643                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 644                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 645                                 }
 646                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 647                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 648                             }
 649                         }
 650                         break;
 651
 652                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 653                         {
 654                             LPBYTE srcbits = sbits;
 655
 656                             for( y = 0; y < lines; y++) {
 657                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 658                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 659                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 660                                 srcbits=(sbits+=srcwidthb);
 661                             }
 662                         }
 663                         break;
 664
 665                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 666                         {
 667                             /* FIXME: BI_BITFIELDS not supported yet */
 668                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 669                                 memcpy(dbits, sbits, srcwidthb);
 670                         }
 671                         break;
 672
 673                     default: /* ? bit bmp -> 32 bit DIB */
 674                         FIXME("32 bit DIB %d bit bitmap\n",
 675                         bmp->bitmap.bmBitsPixel);
 676                         break;
 677                     }
 678                 }
 679                 break;
 680
 681             default: /* ? bit DIB */
 682                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 683                 break;
 684             }
 685         }
 686         /* Otherwise, get bits from the XImage */
 687         else
 688         {
 689             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 690             else
 691             {
 692                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 693                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 694                                                     lines, bits, info, coloruse );
 695                 else
 696                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 697             }
 698         }
 699     }
 700     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 701     {
 702         /* fill in struct members */
 703
 704         if( info->bmiHeader.biBitCount == 0)
 705         {
 706             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 707             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 708             info->bmiHeader.biPlanes = 1;
 709             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 710             info->bmiHeader.biSizeImage =
 711                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 712                                                    bmp->bitmap.bmHeight,
 713                                                    bmp->bitmap.bmBitsPixel );
 714             info->bmiHeader.biCompression = 0;
 715         }
 716         else
 717         {
 718             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 719                                                info->bmiHeader.biWidth,
 720                                                info->bmiHeader.biHeight,
 721                                                info->bmiHeader.biBitCount );
 722         }
 723     }
 724
 725     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 726           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 727           info->bmiHeader.biHeight);
 728
 729     GDI_ReleaseObj( hdc );
 730     GDI_ReleaseObj( hbitmap );
 731
 732     return lines;
 733 }
 734
 735
 736 /***********************************************************************
 737  *           CreateDIBitmap    (GDI32.@)
 738  */
 739 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 740                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 741                             UINT coloruse )
 742 {
 743     HBITMAP handle;
 744     BOOL fColor;
 745     DWORD width;
 746     int height;
 747     WORD bpp;
 748     WORD compr;
 749     DC *dc;
 750
 751     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 752     if (height < 0) height = -height;
 753
 754     /* Check if we should create a monochrome or color bitmap. */
 755     /* We create a monochrome bitmap only if it has exactly 2  */
 756     /* colors, which are black followed by white, nothing else.  */
 757     /* In all other cases, we create a color bitmap.           */
 758
 759     if (bpp != 1) fColor = TRUE;
 760     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 761     else
 762     {
 763         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 764         {
 765             RGBQUAD *rgb = data->bmiColors;
 766             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 767
 768             /* Check if the first color of the colormap is black */
 769             if ((col == RGB(0,0,0)))
 770             {
 771                 rgb++;
 772                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 773                 /* If the second color is white, create a monochrome bitmap */
 774                 fColor =  (col != RGB(0xff,0xff,0xff));
 775             }
 776             /* Note : If the first color of the colormap is white
 777                followed by black, we have to create a color bitmap.
 778                If we don't the white will be displayed in black later on!*/
 779             else fColor = TRUE;
 780         }
 781         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 782         {
 783             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 784             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 785             if ((col == RGB(0,0,0)))
 786             {
 787                 rgb++;
 788                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 789                 fColor = (col != RGB(0xff,0xff,0xff));
 790             }
 791             else fColor = TRUE;
 792         }
 793         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 794         { /* FIXME: correct ? */
 795             RGBQUAD *rgb = data->bmiColors;
 796             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 797
 798             /* Check if the first color of the colormap is black */
 799             if ((col == RGB(0,0,0)))
 800             {
 801                 rgb++;
 802                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 803                 /* If the second color is white, create a monochrome bitmap */
 804                 fColor =  (col != RGB(0xff,0xff,0xff));
 805             }
 806             /* Note : If the first color of the colormap is white
 807                followed by black, we have to create a color bitmap.
 808                If we don't the white will be displayed in black later on!*/
 809             else fColor = TRUE;
 810         }
 811         else
 812         {
 813             ERR("(%ld): wrong/unknown size for data\n",
 814                      data->bmiHeader.biSize );
 815             return 0;
 816         }
 817     }
 818
 819     /* Now create the bitmap */
 820
 821     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 822
 823     if (fColor)
 824         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 825                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 826     else handle = CreateBitmap( width, height, 1, 1, NULL );
 827
 828     if (handle)
 829     {
 830         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 831         else if (!BITMAP_SetOwnerDC( handle, dc ))
 832         {
 833             DeleteObject( handle );
 834             handle = 0;
 835         }
 836     }
 837
 838     GDI_ReleaseObj( hdc );
 839     return handle;
 840 }
 841
 842 /***********************************************************************
 843  *           CreateDIBSection    (GDI.489)
 844  */
 845 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 846                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 847 {
 848     LPVOID bits32;
 849     HBITMAP hbitmap;
 850
 851     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 852     if (hbitmap)
 853     {
 854         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 855         if (bmp && bmp->dib && bits32)
 856         {
 857             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 858             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 859             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 860             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 861                          bi->biSizeImage : width_bytes * height;
 862
 863             /* calculate number of sel's needed for size with 64K steps */
 864             WORD count = (size + 0xffff) / 0x10000;
 865             WORD sel = AllocSelectorArray16(count);
 866             int i;
 867
 868             for (i = 0; i < count; i++)
 869             {
 870                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 871                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 872                 size -= 0x10000;
 873             }
 874             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 875             if (bits16) *bits16 = bmp->segptr_bits;
 876         }
 877         if (bmp) GDI_ReleaseObj( hbitmap );
 878     }
 879     return HBITMAP_16(hbitmap);
 880 }
 881
 882 /***********************************************************************
 883  *           DIB_CreateDIBSection
 884  */
 885 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 886                              LPVOID *bits, HANDLE section,
 887                              DWORD offset, DWORD ovr_pitch)
 888 {
 889     HBITMAP hbitmap = 0;
 890     DC *dc;
 891     BOOL bDesktopDC = FALSE;
 892
 893     /* If the reference hdc is null, take the desktop dc */
 894     if (hdc == 0)
 895     {
 896         hdc = CreateCompatibleDC(0);
 897         bDesktopDC = TRUE;
 898     }
 899
 900     if ((dc = DC_GetDCPtr( hdc )))
 901     {
 902         hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 903         GDI_ReleaseObj(hdc);
 904     }
 905
 906     if (bDesktopDC)
 907       DeleteDC(hdc);
 908
 909     return hbitmap;
 910 }
 911
 912 /***********************************************************************
 913  *           CreateDIBSection    (GDI32.@)
 914  */
 915 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 916                                 LPVOID *bits, HANDLE section,
 917                                 DWORD offset)
 918 {
 919     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 920 }
 921
 922 /***********************************************************************
 923  *           DIB_CreateDIBFromBitmap
 924  *  Allocates a packed DIB and copies the bitmap data into it.
 925  */
 926 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 927 {
 928     BITMAPOBJ *pBmp = NULL;
 929     HGLOBAL hPackedDIB = 0;
 930     LPBYTE pPackedDIB = NULL;
 931     LPBITMAPINFOHEADER pbmiHeader = NULL;
 932     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 933                  OffsetBits = 0, nLinesCopied = 0;
 934
 935     /* Get a pointer to the BITMAPOBJ structure */
 936     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 937     if (!pBmp) return hPackedDIB;
 938
 939     /* Get the bitmap dimensions */
 940     width = pBmp->bitmap.bmWidth;
 941     height = pBmp->bitmap.bmHeight;
 942     depth = pBmp->bitmap.bmBitsPixel;
 943
 944     /*
 945      * A packed DIB contains a BITMAPINFO structure followed immediately by
 946      * an optional color palette and the pixel data.
 947      */
 948
 949     /* Calculate the size of the packed DIB */
 950     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 951     cPackedSize = sizeof(BITMAPINFOHEADER)
 952                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 953                   + cDataSize;
 954     /* Get the offset to the bits */
 955     OffsetBits = cPackedSize - cDataSize;
 956
 957     /* Allocate the packed DIB */
 958     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 959     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 960                              cPackedSize );
 961     if ( !hPackedDIB )
 962     {
 963         WARN("Could not allocate packed DIB!\n");
 964         goto END;
 965     }
 966
 967     /* A packed DIB starts with a BITMAPINFOHEADER */
 968     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 969     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 970
 971     /* Init the BITMAPINFOHEADER */
 972     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 973     pbmiHeader->biWidth = width;
 974     pbmiHeader->biHeight = height;
 975     pbmiHeader->biPlanes = 1;
 976     pbmiHeader->biBitCount = depth;
 977     pbmiHeader->biCompression = BI_RGB;
 978     pbmiHeader->biSizeImage = 0;
 979     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
 980     pbmiHeader->biClrUsed = 0;
 981     pbmiHeader->biClrImportant = 0;
 982
 983     /* Retrieve the DIB bits from the bitmap and fill in the
 984      * DIB color table if present */
 985
 986     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
 987                              hBmp,                      /* Handle to bitmap */
 988                              0,                         /* First scan line to set in dest bitmap */
 989                              height,                    /* Number of scan lines to copy */
 990                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
 991                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
 992                              0);                        /* RGB or palette index */
 993     GlobalUnlock(hPackedDIB);
 994
 995     /* Cleanup if GetDIBits failed */
 996     if (nLinesCopied != height)
 997     {
 998         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
 999         GlobalFree(hPackedDIB);
1000         hPackedDIB = 0;
1001     }
1002
1003 END:
1004     GDI_ReleaseObj( hBmp );
1005     return hPackedDIB;
1006 }