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