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 static 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   (GDI32.@)
 151  */
 152 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 153                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 154                        INT heightSrc, const void *bits,
 155                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 156 {
 157     DC *dc = DC_GetDCUpdate( hdc );
 158     if(!dc) return FALSE;
 159
 160     if(dc->funcs->pStretchDIBits)
 161     {
 162         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 163                                               heightDst, xSrc, ySrc, widthSrc,
 164                                               heightSrc, bits, info, wUsage, dwRop);
 165         GDI_ReleaseObj( hdc );
 166     }
 167     else /* use StretchBlt */
 168     {
 169         HBITMAP hBitmap, hOldBitmap;
 170         HDC hdcMem;
 171
 172         GDI_ReleaseObj( hdc );
 173         hdcMem = CreateCompatibleDC( hdc );
 174         if (info->bmiHeader.biCompression == BI_RLE4 ||
 175             info->bmiHeader.biCompression == BI_RLE8) {
 176
 177            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 178             * contain all the rectangle described in bmiHeader, but only part of it.
 179             * This mean that those undescribed pixels must be left untouched.
 180             * So, we first copy on a memory bitmap the current content of the
 181             * destination rectangle, blit the DIB bits on top of it - hence leaving
 182             * the gaps untouched -, and blitting the rectangle back.
 183             * This insure that gaps are untouched on the destination rectangle
 184             * Not doing so leads to trashed images (the gaps contain what was on the
 185             * memory bitmap => generally black or garbage)
 186             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 187             * another speed vs correctness issue. Anyway, if speed is needed, then the
 188             * pStretchDIBits function shall be implemented.
 189             * ericP (2000/09/09)
 190             */
 191            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 192                                             info->bmiHeader.biHeight);
 193            hOldBitmap = SelectObject( hdcMem, hBitmap );
 194
 195            /* copy existing bitmap from destination dc */
 196            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 197                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 198                        dwRop );
 199            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 200                      info, DIB_RGB_COLORS);
 201
 202         } else {
 203            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 204                                      bits, info, wUsage );
 205            hOldBitmap = SelectObject( hdcMem, hBitmap );
 206         }
 207
 208         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 209            left (negative biHeight) */
 210         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 211                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 212                     widthSrc, heightSrc, dwRop );
 213         SelectObject( hdcMem, hOldBitmap );
 214         DeleteDC( hdcMem );
 215         DeleteObject( hBitmap );
 216     }
 217     return heightSrc;
 218 }
 219
 220
 221 /******************************************************************************
 222  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 223  *
 224  * PARAMS
 225  *    hdc       [I] Handle to device context
 226  *    hbitmap   [I] Handle to bitmap
 227  *    startscan [I] Starting scan line
 228  *    lines     [I] Number of scan lines
 229  *    bits      [I] Array of bitmap bits
 230  *    info      [I] Address of structure with data
 231  *    coloruse  [I] Type of color indexes to use
 232  *
 233  * RETURNS
 234  *    Success: Number of scan lines copied
 235  *    Failure: 0
 236  */
 237 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 238                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 239                       UINT coloruse )
 240 {
 241     DC *dc;
 242     BITMAPOBJ *bitmap;
 243     INT result = 0;
 244
 245     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 246
 247     if (!(dc = DC_GetDCUpdate( hdc )))
 248     {
 249         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 250         GDI_ReleaseObj( hbitmap );
 251         return 0;
 252     }
 253
 254     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 255
 256     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 257         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 258                                             bits, info, coloruse );
 259     else
 260         result = lines;
 261
 262  done:
 263     GDI_ReleaseObj( hdc );
 264     GDI_ReleaseObj( hbitmap );
 265     return result;
 266 }
 267
 268
 269 /***********************************************************************
 270  *           SetDIBitsToDevice   (GDI32.@)
 271  */
 272 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 273                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 274                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 275                            UINT coloruse )
 276 {
 277     INT ret;
 278     DC *dc;
 279
 280     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 281
 282     if(dc->funcs->pSetDIBitsToDevice)
 283         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 284                                              ySrc, startscan, lines, bits,
 285                                              info, coloruse );
 286     else {
 287         FIXME("unimplemented on hdc %08x\n", hdc);
 288         ret = 0;
 289     }
 290
 291     GDI_ReleaseObj( hdc );
 292     return ret;
 293 }
 294
 295 /***********************************************************************
 296  *           SetDIBColorTable    (GDI32.@)
 297  */
 298 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 299 {
 300     DC * dc;
 301     UINT result = 0;
 302
 303     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 304
 305     if (dc->funcs->pSetDIBColorTable)
 306         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 307
 308     GDI_ReleaseObj( hdc );
 309     return result;
 310 }
 311
 312
 313 /***********************************************************************
 314  *           GetDIBColorTable    (GDI32.@)
 315  */
 316 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 317 {
 318     DC * dc;
 319     UINT result = 0;
 320
 321     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 322
 323     if (dc->funcs->pGetDIBColorTable)
 324         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 325
 326     GDI_ReleaseObj( hdc );
 327     return result;
 328 }
 329
 330 /* FIXME the following two structs should be combined with __sysPalTemplate in
 331    objects/color.c - this should happen after de-X11-ing both of these
 332    files.
 333    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 334    and blue - sigh */
 335
 336 static RGBQUAD EGAColors[16] = {
 337 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 338     { 0x00, 0x00, 0x00, 0x00 },
 339     { 0x00, 0x00, 0x80, 0x00 },
 340     { 0x00, 0x80, 0x00, 0x00 },
 341     { 0x00, 0x80, 0x80, 0x00 },
 342     { 0x80, 0x00, 0x00, 0x00 },
 343     { 0x80, 0x00, 0x80, 0x00 },
 344     { 0x80, 0x80, 0x00, 0x00 },
 345     { 0x80, 0x80, 0x80, 0x00 },
 346     { 0xc0, 0xc0, 0xc0, 0x00 },
 347     { 0x00, 0x00, 0xff, 0x00 },
 348     { 0x00, 0xff, 0x00, 0x00 },
 349     { 0x00, 0xff, 0xff, 0x00 },
 350     { 0xff, 0x00, 0x00, 0x00 },
 351     { 0xff, 0x00, 0xff, 0x00 },
 352     { 0xff, 0xff, 0x00, 0x00 },
 353     { 0xff, 0xff, 0xff, 0x00 }
 354 };
 355
 356
 357 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 358 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 359     { 0x00, 0x00, 0x00, 0x00 },
 360     { 0x00, 0x00, 0x80, 0x00 },
 361     { 0x00, 0x80, 0x00, 0x00 },
 362     { 0x00, 0x80, 0x80, 0x00 },
 363     { 0x80, 0x00, 0x00, 0x00 },
 364     { 0x80, 0x00, 0x80, 0x00 },
 365     { 0x80, 0x80, 0x00, 0x00 },
 366     { 0xc0, 0xc0, 0xc0, 0x00 },
 367     { 0xc0, 0xdc, 0xc0, 0x00 },
 368     { 0xf0, 0xca, 0xa6, 0x00 },
 369     { 0xf0, 0xfb, 0xff, 0x00 },
 370     { 0xa4, 0xa0, 0xa0, 0x00 },
 371     { 0x80, 0x80, 0x80, 0x00 },
 372     { 0x00, 0x00, 0xf0, 0x00 },
 373     { 0x00, 0xff, 0x00, 0x00 },
 374     { 0x00, 0xff, 0xff, 0x00 },
 375     { 0xff, 0x00, 0x00, 0x00 },
 376     { 0xff, 0x00, 0xff, 0x00 },
 377     { 0xff, 0xff, 0x00, 0x00 },
 378     { 0xff, 0xff, 0xff, 0x00 }
 379 };
 380
 381
 382 /******************************************************************************
 383  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 384  *
 385  * RETURNS
 386  *    Success: Number of scan lines copied from bitmap
 387  *    Failure: 0
 388  *
 389  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 390  */
 391 INT WINAPI GetDIBits(
 392     HDC hdc,         /* [in]  Handle to device context */
 393     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 394     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 395     UINT lines,      /* [in]  Number of scan lines to copy */
 396     LPVOID bits,       /* [out] Address of array for bitmap bits */
 397     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 398     UINT coloruse)   /* [in]  RGB or palette index */
 399 {
 400     DC * dc;
 401     BITMAPOBJ * bmp;
 402     PALETTEENTRY * palEntry;
 403     PALETTEOBJ * palette;
 404     int i;
 405
 406     if (!info) return 0;
 407     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 408     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 409     {
 410         GDI_ReleaseObj( hdc );
 411         return 0;
 412     }
 413     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 414     {
 415         GDI_ReleaseObj( hdc );
 416         GDI_ReleaseObj( hbitmap );
 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(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 427             palEntry = palette->logpalette.palPalEntry;
 428             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 429                 if (coloruse == DIB_RGB_COLORS) {
 430                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 431                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 432                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 433                     info->bmiColors[i].rgbReserved = 0;
 434                 }
 435                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 436             }
 437         } else {
 438             switch (info->bmiHeader.biBitCount) {
 439             case 1:
 440                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 441                   info->bmiColors[0].rgbBlue = 0;
 442                 info->bmiColors[0].rgbReserved = 0;
 443                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 444                   info->bmiColors[1].rgbBlue = 0xff;
 445                 info->bmiColors[1].rgbReserved = 0;
 446                 break;
 447
 448             case 4:
 449                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 450                 break;
 451
 452             case 8:
 453                 {
 454                 INT r, g, b;
 455                 RGBQUAD *color;
 456
 457                 memcpy(info->bmiColors, DefLogPalette,
 458                        10 * sizeof(RGBQUAD));
 459                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 460                        10 * sizeof(RGBQUAD));
 461                 color = info->bmiColors + 10;
 462                 for(r = 0; r <= 5; r++) /* FIXME */
 463                     for(g = 0; g <= 5; g++)
 464                         for(b = 0; b <= 5; b++) {
 465                             color->rgbRed =   (r * 0xff) / 5;
 466                             color->rgbGreen = (g * 0xff) / 5;
 467                             color->rgbBlue =  (b * 0xff) / 5;
 468                             color->rgbReserved = 0;
 469                             color++;
 470                         }
 471                 }
 472             }
 473         }
 474     }
 475
 476     GDI_ReleaseObj( dc->hPalette );
 477
 478     if (bits && lines)
 479     {
 480         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 481         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 482         {
 483             /*FIXME: Only RGB dibs supported for now */
 484             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 485             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 486             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 487             unsigned int x, y;
 488
 489             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 490             {
 491                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 492                 dstwidthb = -dstwidthb;
 493             }
 494
 495             switch( info->bmiHeader.biBitCount ) {
 496
 497             case 15:
 498             case 16: /* 16 bpp dstDIB */
 499                 {
 500                     LPWORD dstbits = (LPWORD)dbits;
 501                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 502
 503                     /* FIXME: BI_BITFIELDS not supported yet */
 504
 505                     switch(bmp->dib->dsBm.bmBitsPixel) {
 506
 507                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 508                         {
 509                             /* FIXME: BI_BITFIELDS not supported yet */
 510                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 511                                 memcpy(dbits, sbits, srcwidthb);
 512                         }
 513                         break;
 514
 515                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 516                         {
 517                             LPBYTE srcbits = sbits;
 518
 519                             for( y = 0; y < lines; y++) {
 520                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 521                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 522                                                  (((WORD)srcbits[1] << 2) & gmask) |
 523                                                  (((WORD)srcbits[2] << 7) & rmask);
 524
 525                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 526                                 srcbits = (sbits += srcwidthb);
 527                             }
 528                         }
 529                         break;
 530
 531                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 532                         {
 533                             LPDWORD srcbits = (LPDWORD)sbits;
 534                             DWORD val;
 535
 536                             for( y = 0; y < lines; y++) {
 537                                 for( x = 0; x < srcwidth; x++ ) {
 538                                     val = *srcbits++;
 539                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 540                                                        ((val >> 9) & rmask));
 541                                 }
 542                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 543                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 544                             }
 545                         }
 546                         break;
 547
 548                     default: /* ? bit bmp -> 16 bit DIB */
 549                         FIXME("15/16 bit DIB %d bit bitmap\n",
 550                         bmp->bitmap.bmBitsPixel);
 551                         break;
 552                     }
 553                 }
 554                 break;
 555
 556             case 24: /* 24 bpp dstDIB */
 557                 {
 558                     LPBYTE dstbits = dbits;
 559
 560                     switch(bmp->dib->dsBm.bmBitsPixel) {
 561
 562                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 563                         {
 564                             LPWORD srcbits = (LPWORD)sbits;
 565                             WORD val;
 566
 567                             /* FIXME: BI_BITFIELDS not supported yet */
 568                             for( y = 0; y < lines; y++) {
 569                                 for( x = 0; x < srcwidth; x++ ) {
 570                                     val = *srcbits++;
 571                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 572                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 573                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 574                                 }
 575                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 576                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 577                             }
 578                         }
 579                         break;
 580
 581                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 582                         {
 583                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 584                                 memcpy(dbits, sbits, srcwidthb);
 585                         }
 586                         break;
 587
 588                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 589                         {
 590                             LPBYTE srcbits = (LPBYTE)sbits;
 591
 592                             for( y = 0; y < lines; y++) {
 593                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 594                                     *dstbits++ = *srcbits++;
 595                                     *dstbits++ = *srcbits++;
 596                                     *dstbits++ = *srcbits++;
 597                                 }
 598                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 599                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 600                             }
 601                         }
 602                         break;
 603
 604                     default: /* ? bit bmp -> 24 bit DIB */
 605                         FIXME("24 bit DIB %d bit bitmap\n",
 606                               bmp->bitmap.bmBitsPixel);
 607                         break;
 608                     }
 609                 }
 610                 break;
 611
 612             case 32: /* 32 bpp dstDIB */
 613                 {
 614                     LPDWORD dstbits = (LPDWORD)dbits;
 615
 616                     /* FIXME: BI_BITFIELDS not supported yet */
 617
 618                     switch(bmp->dib->dsBm.bmBitsPixel) {
 619                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 620                         {
 621                             LPWORD srcbits = (LPWORD)sbits;
 622                             DWORD val;
 623
 624                             /* FIXME: BI_BITFIELDS not supported yet */
 625                             for( y = 0; y < lines; y++) {
 626                                 for( x = 0; x < srcwidth; x++ ) {
 627                                     val = (DWORD)*srcbits++;
 628                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 629                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 630                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 631                                 }
 632                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 633                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 634                             }
 635                         }
 636                         break;
 637
 638                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 639                         {
 640                             LPBYTE srcbits = sbits;
 641
 642                             for( y = 0; y < lines; y++) {
 643                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 644                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 645                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 646                                 srcbits=(sbits+=srcwidthb);
 647                             }
 648                         }
 649                         break;
 650
 651                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 652                         {
 653                             /* FIXME: BI_BITFIELDS not supported yet */
 654                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 655                                 memcpy(dbits, sbits, srcwidthb);
 656                         }
 657                         break;
 658
 659                     default: /* ? bit bmp -> 16 bit DIB */
 660                         FIXME("15/16 bit DIB %d bit bitmap\n",
 661                         bmp->bitmap.bmBitsPixel);
 662                         break;
 663                     }
 664                 }
 665                 break;
 666
 667             default: /* ? bit DIB */
 668                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 669                 break;
 670             }
 671         }
 672         /* Otherwise, get bits from the XImage */
 673         else
 674         {
 675             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 676             else
 677             {
 678                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 679                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 680                                                     lines, bits, info, coloruse );
 681                 else
 682                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 683             }
 684         }
 685     }
 686     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 687     {
 688         /* fill in struct members */
 689
 690         if( info->bmiHeader.biBitCount == 0)
 691         {
 692             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 693             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 694             info->bmiHeader.biPlanes = 1;
 695             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 696             info->bmiHeader.biSizeImage =
 697                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 698                                                    bmp->bitmap.bmHeight,
 699                                                    bmp->bitmap.bmBitsPixel );
 700             info->bmiHeader.biCompression = 0;
 701         }
 702         else
 703         {
 704             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 705                                                info->bmiHeader.biWidth,
 706                                                info->bmiHeader.biHeight,
 707                                                info->bmiHeader.biBitCount );
 708         }
 709     }
 710
 711     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 712           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 713           info->bmiHeader.biHeight);
 714
 715     GDI_ReleaseObj( hdc );
 716     GDI_ReleaseObj( hbitmap );
 717
 718     return lines;
 719 }
 720
 721
 722 /***********************************************************************
 723  *           CreateDIBitmap    (GDI32.@)
 724  */
 725 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 726                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 727                             UINT coloruse )
 728 {
 729     HBITMAP handle;
 730     BOOL fColor;
 731     DWORD width;
 732     int height;
 733     WORD bpp;
 734     WORD compr;
 735     DC *dc;
 736
 737     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 738     if (height < 0) height = -height;
 739
 740     /* Check if we should create a monochrome or color bitmap. */
 741     /* We create a monochrome bitmap only if it has exactly 2  */
 742     /* colors, which are black followed by white, nothing else.  */
 743     /* In all other cases, we create a color bitmap.           */
 744
 745     if (bpp != 1) fColor = TRUE;
 746     else if ((coloruse != DIB_RGB_COLORS) ||
 747              (init != CBM_INIT) || !data) fColor = FALSE;
 748     else
 749     {
 750         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 751         {
 752             RGBQUAD *rgb = data->bmiColors;
 753             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 754
 755             /* Check if the first color of the colormap is black */
 756             if ((col == RGB(0,0,0)))
 757             {
 758                 rgb++;
 759                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 760                 /* If the second color is white, create a monochrome bitmap */
 761                 fColor =  (col != RGB(0xff,0xff,0xff));
 762             }
 763             /* Note : If the first color of the colormap is white
 764                followed by black, we have to create a color bitmap.
 765                If we don't the white will be displayed in black later on!*/
 766             else fColor = TRUE;
 767         }
 768         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 769         {
 770             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 771             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 772             if ((col == RGB(0,0,0)))
 773             {
 774                 rgb++;
 775                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 776                 fColor = (col != RGB(0xff,0xff,0xff));
 777             }
 778             else fColor = TRUE;
 779         }
 780         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 781         { /* FIXME: correct ? */
 782             RGBQUAD *rgb = data->bmiColors;
 783             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 784
 785             /* Check if the first color of the colormap is black */
 786             if ((col == RGB(0,0,0)))
 787             {
 788                 rgb++;
 789                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 790                 /* If the second color is white, create a monochrome bitmap */
 791                 fColor =  (col != RGB(0xff,0xff,0xff));
 792             }
 793             /* Note : If the first color of the colormap is white
 794                followed by black, we have to create a color bitmap.
 795                If we don't the white will be displayed in black later on!*/
 796             else fColor = TRUE;
 797         }
 798         else
 799         {
 800             ERR("(%ld): wrong/unknown size for data\n",
 801                      data->bmiHeader.biSize );
 802             return 0;
 803         }
 804     }
 805
 806     /* Now create the bitmap */
 807
 808     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 809
 810     if (fColor)
 811         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 812                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 813     else handle = CreateBitmap( width, height, 1, 1, NULL );
 814
 815     if (handle)
 816     {
 817         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 818         else if (!BITMAP_SetOwnerDC( handle, dc ))
 819         {
 820             DeleteObject( handle );
 821             handle = 0;
 822         }
 823     }
 824
 825     GDI_ReleaseObj( hdc );
 826     return handle;
 827 }
 828
 829 /***********************************************************************
 830  *           CreateDIBSection    (GDI.489)
 831  */
 832 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 833                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 834 {
 835     LPVOID bits32;
 836     HBITMAP hbitmap;
 837
 838     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 839     if (hbitmap)
 840     {
 841         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 842         if (bmp && bmp->dib && bits32)
 843         {
 844             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 845             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 846             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 847             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 848                          bi->biSizeImage : width_bytes * height;
 849
 850             /* calculate number of sel's needed for size with 64K steps */
 851             WORD count = (size + 0xffff) / 0x10000;
 852             WORD sel = AllocSelectorArray16(count);
 853             int i;
 854
 855             for (i = 0; i < count; i++)
 856             {
 857                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 858                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 859                 size -= 0x10000;
 860             }
 861             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 862             if (bits16) *bits16 = bmp->segptr_bits;
 863         }
 864         if (bmp) GDI_ReleaseObj( hbitmap );
 865     }
 866     return hbitmap;
 867 }
 868
 869 /***********************************************************************
 870  *           DIB_CreateDIBSection
 871  */
 872 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 873                              LPVOID *bits, HANDLE section,
 874                              DWORD offset, DWORD ovr_pitch)
 875 {
 876     HBITMAP hbitmap = 0;
 877     DC *dc;
 878     BOOL bDesktopDC = FALSE;
 879
 880     /* If the reference hdc is null, take the desktop dc */
 881     if (hdc == 0)
 882     {
 883         hdc = CreateCompatibleDC(0);
 884         bDesktopDC = TRUE;
 885     }
 886
 887     if ((dc = DC_GetDCPtr( hdc )))
 888     {
 889         hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 890         GDI_ReleaseObj(hdc);
 891     }
 892
 893     if (bDesktopDC)
 894       DeleteDC(hdc);
 895
 896     return hbitmap;
 897 }
 898
 899 /***********************************************************************
 900  *           CreateDIBSection    (GDI32.@)
 901  */
 902 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 903                                 LPVOID *bits, HANDLE section,
 904                                 DWORD offset)
 905 {
 906     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 907 }
 908
 909 /***********************************************************************
 910  *           DIB_CreateDIBFromBitmap
 911  *  Allocates a packed DIB and copies the bitmap data into it.
 912  */
 913 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 914 {
 915     BITMAPOBJ *pBmp = NULL;
 916     HGLOBAL hPackedDIB = 0;
 917     LPBYTE pPackedDIB = NULL;
 918     LPBITMAPINFOHEADER pbmiHeader = NULL;
 919     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 920                  OffsetBits = 0, nLinesCopied = 0;
 921
 922     /* Get a pointer to the BITMAPOBJ structure */
 923     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 924     if (!pBmp) return hPackedDIB;
 925
 926     /* Get the bitmap dimensions */
 927     width = pBmp->bitmap.bmWidth;
 928     height = pBmp->bitmap.bmHeight;
 929     depth = pBmp->bitmap.bmBitsPixel;
 930
 931     /*
 932      * A packed DIB contains a BITMAPINFO structure followed immediately by
 933      * an optional color palette and the pixel data.
 934      */
 935
 936     /* Calculate the size of the packed DIB */
 937     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 938     cPackedSize = sizeof(BITMAPINFOHEADER)
 939                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 940                   + cDataSize;
 941     /* Get the offset to the bits */
 942     OffsetBits = cPackedSize - cDataSize;
 943
 944     /* Allocate the packed DIB */
 945     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 946     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 947                              cPackedSize );
 948     if ( !hPackedDIB )
 949     {
 950         WARN("Could not allocate packed DIB!\n");
 951         goto END;
 952     }
 953
 954     /* A packed DIB starts with a BITMAPINFOHEADER */
 955     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 956     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 957
 958     /* Init the BITMAPINFOHEADER */
 959     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 960     pbmiHeader->biWidth = width;
 961     pbmiHeader->biHeight = height;
 962     pbmiHeader->biPlanes = 1;
 963     pbmiHeader->biBitCount = depth;
 964     pbmiHeader->biCompression = BI_RGB;
 965     pbmiHeader->biSizeImage = 0;
 966     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
 967     pbmiHeader->biClrUsed = 0;
 968     pbmiHeader->biClrImportant = 0;
 969
 970     /* Retrieve the DIB bits from the bitmap and fill in the
 971      * DIB color table if present */
 972
 973     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
 974                              hBmp,                      /* Handle to bitmap */
 975                              0,                         /* First scan line to set in dest bitmap */
 976                              height,                    /* Number of scan lines to copy */
 977                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
 978                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
 979                              0);                        /* RGB or palette index */
 980     GlobalUnlock(hPackedDIB);
 981
 982     /* Cleanup if GetDIBits failed */
 983     if (nLinesCopied != height)
 984     {
 985         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
 986         GlobalFree(hPackedDIB);
 987         hPackedDIB = 0;
 988     }
 989
 990 END:
 991     GDI_ReleaseObj( hBmp );
 992     return hPackedDIB;
 993 }