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