objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "gdi.h"
  28 #include "wownt32.h"
  29 #include "gdi_private.h"
  30 #include "wine/debug.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         HPALETTE hpal = NULL;
 177         HDC hdcMem;
 178
 179         GDI_ReleaseObj( hdc );
 180         hdcMem = CreateCompatibleDC( hdc );
 181         hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 182                                          info->bmiHeader.biHeight);
 183         hOldBitmap = SelectObject( hdcMem, hBitmap );
 184         if(wUsage == DIB_PAL_COLORS)
 185         {
 186             hpal = GetCurrentObject(hdc, OBJ_PAL);
 187             hpal = SelectPalette(hdcMem, hpal, FALSE);
 188         }
 189
 190         if (info->bmiHeader.biCompression == BI_RLE4 ||
 191             info->bmiHeader.biCompression == BI_RLE8) {
 192
 193            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 194             * contain all the rectangle described in bmiHeader, but only part of it.
 195             * This mean that those undescribed pixels must be left untouched.
 196             * So, we first copy on a memory bitmap the current content of the
 197             * destination rectangle, blit the DIB bits on top of it - hence leaving
 198             * the gaps untouched -, and blitting the rectangle back.
 199             * This insure that gaps are untouched on the destination rectangle
 200             * Not doing so leads to trashed images (the gaps contain what was on the
 201             * memory bitmap => generally black or garbage)
 202             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 203             * another speed vs correctness issue. Anyway, if speed is needed, then the
 204             * pStretchDIBits function shall be implemented.
 205             * ericP (2000/09/09)
 206             */
 207
 208             /* copy existing bitmap from destination dc */
 209             StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 210                         widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 211                         dwRop );
 212         }
 213
 214         SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 215                      info, wUsage);
 216
 217         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 218            left (negative biHeight) */
 219         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 220                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 221                     widthSrc, heightSrc, dwRop );
 222         if(hpal)
 223             SelectPalette(hdcMem, hpal, FALSE);
 224         SelectObject( hdcMem, hOldBitmap );
 225         DeleteDC( hdcMem );
 226         DeleteObject( hBitmap );
 227     }
 228     return heightSrc;
 229 }
 230
 231
 232 /******************************************************************************
 233  * SetDIBits [GDI32.@]
 234  *
 235  * Sets pixels in a bitmap using colors from DIB.
 236  *
 237  * PARAMS
 238  *    hdc       [I] Handle to device context
 239  *    hbitmap   [I] Handle to bitmap
 240  *    startscan [I] Starting scan line
 241  *    lines     [I] Number of scan lines
 242  *    bits      [I] Array of bitmap bits
 243  *    info      [I] Address of structure with data
 244  *    coloruse  [I] Type of color indexes to use
 245  *
 246  * RETURNS
 247  *    Success: Number of scan lines copied
 248  *    Failure: 0
 249  */
 250 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 251                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 252                       UINT coloruse )
 253 {
 254     DC *dc;
 255     BITMAPOBJ *bitmap;
 256     INT result = 0;
 257
 258     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 259
 260     if (!(dc = DC_GetDCUpdate( hdc )))
 261     {
 262         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 263         GDI_ReleaseObj( hbitmap );
 264         return 0;
 265     }
 266
 267     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 268
 269     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 270         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 271                                             bits, info, coloruse );
 272     else
 273         result = lines;
 274
 275  done:
 276     GDI_ReleaseObj( hdc );
 277     GDI_ReleaseObj( hbitmap );
 278     return result;
 279 }
 280
 281
 282 /***********************************************************************
 283  *           SetDIBitsToDevice   (GDI32.@)
 284  */
 285 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 286                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 287                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 288                            UINT coloruse )
 289 {
 290     INT ret;
 291     DC *dc;
 292
 293     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 294
 295     if(dc->funcs->pSetDIBitsToDevice)
 296         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 297                                              ySrc, startscan, lines, bits,
 298                                              info, coloruse );
 299     else {
 300         FIXME("unimplemented on hdc %p\n", hdc);
 301         ret = 0;
 302     }
 303
 304     GDI_ReleaseObj( hdc );
 305     return ret;
 306 }
 307
 308 /***********************************************************************
 309  *           SetDIBColorTable    (GDI32.@)
 310  */
 311 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 312 {
 313     DC * dc;
 314     UINT result = 0;
 315
 316     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 317
 318     if (dc->funcs->pSetDIBColorTable)
 319         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 320
 321     GDI_ReleaseObj( hdc );
 322     return result;
 323 }
 324
 325
 326 /***********************************************************************
 327  *           GetDIBColorTable    (GDI32.@)
 328  */
 329 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 330 {
 331     DC * dc;
 332     UINT result = 0;
 333
 334     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 335
 336     if (dc->funcs->pGetDIBColorTable)
 337         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 338
 339     GDI_ReleaseObj( hdc );
 340     return result;
 341 }
 342
 343 /* FIXME the following two structs should be combined with __sysPalTemplate in
 344    objects/color.c - this should happen after de-X11-ing both of these
 345    files.
 346    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 347    and blue - sigh */
 348
 349 static RGBQUAD EGAColors[16] = {
 350 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 351     { 0x00, 0x00, 0x00, 0x00 },
 352     { 0x00, 0x00, 0x80, 0x00 },
 353     { 0x00, 0x80, 0x00, 0x00 },
 354     { 0x00, 0x80, 0x80, 0x00 },
 355     { 0x80, 0x00, 0x00, 0x00 },
 356     { 0x80, 0x00, 0x80, 0x00 },
 357     { 0x80, 0x80, 0x00, 0x00 },
 358     { 0x80, 0x80, 0x80, 0x00 },
 359     { 0xc0, 0xc0, 0xc0, 0x00 },
 360     { 0x00, 0x00, 0xff, 0x00 },
 361     { 0x00, 0xff, 0x00, 0x00 },
 362     { 0x00, 0xff, 0xff, 0x00 },
 363     { 0xff, 0x00, 0x00, 0x00 },
 364     { 0xff, 0x00, 0xff, 0x00 },
 365     { 0xff, 0xff, 0x00, 0x00 },
 366     { 0xff, 0xff, 0xff, 0x00 }
 367 };
 368
 369
 370 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 371 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 372     { 0x00, 0x00, 0x00, 0x00 },
 373     { 0x00, 0x00, 0x80, 0x00 },
 374     { 0x00, 0x80, 0x00, 0x00 },
 375     { 0x00, 0x80, 0x80, 0x00 },
 376     { 0x80, 0x00, 0x00, 0x00 },
 377     { 0x80, 0x00, 0x80, 0x00 },
 378     { 0x80, 0x80, 0x00, 0x00 },
 379     { 0xc0, 0xc0, 0xc0, 0x00 },
 380     { 0xc0, 0xdc, 0xc0, 0x00 },
 381     { 0xf0, 0xca, 0xa6, 0x00 },
 382     { 0xf0, 0xfb, 0xff, 0x00 },
 383     { 0xa4, 0xa0, 0xa0, 0x00 },
 384     { 0x80, 0x80, 0x80, 0x00 },
 385     { 0x00, 0x00, 0xf0, 0x00 },
 386     { 0x00, 0xff, 0x00, 0x00 },
 387     { 0x00, 0xff, 0xff, 0x00 },
 388     { 0xff, 0x00, 0x00, 0x00 },
 389     { 0xff, 0x00, 0xff, 0x00 },
 390     { 0xff, 0xff, 0x00, 0x00 },
 391     { 0xff, 0xff, 0xff, 0x00 }
 392 };
 393
 394
 395 /******************************************************************************
 396  * GetDIBits [GDI32.@]
 397  *
 398  * Retrieves bits of bitmap and copies to buffer.
 399  *
 400  * RETURNS
 401  *    Success: Number of scan lines copied from bitmap
 402  *    Failure: 0
 403  *
 404  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 405  */
 406 INT WINAPI GetDIBits(
 407     HDC hdc,         /* [in]  Handle to device context */
 408     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 409     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 410     UINT lines,      /* [in]  Number of scan lines to copy */
 411     LPVOID bits,       /* [out] Address of array for bitmap bits */
 412     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 413     UINT coloruse)   /* [in]  RGB or palette index */
 414 {
 415     DC * dc;
 416     BITMAPOBJ * bmp;
 417     int i;
 418
 419     if (!info) return 0;
 420     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 421     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 422     {
 423         GDI_ReleaseObj( hdc );
 424         return 0;
 425     }
 426
 427     /* Transfer color info */
 428
 429     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 430
 431         info->bmiHeader.biClrUsed = 0;
 432
 433         /* If the bitmap object already has a dib section at the
 434            same color depth then get the color map from it */
 435         if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
 436             GetDIBColorTable(hdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
 437         }
 438         else {
 439             if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 440                 /* Generate the color map from the selected palette */
 441                 PALETTEENTRY * palEntry;
 442                 PALETTEOBJ * palette;
 443                 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
 444                     GDI_ReleaseObj( hdc );
 445                     GDI_ReleaseObj( hbitmap );
 446                     return 0;
 447                 }
 448                 palEntry = palette->logpalette.palPalEntry;
 449                 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 450                     if (coloruse == DIB_RGB_COLORS) {
 451                         info->bmiColors[i].rgbRed      = palEntry->peRed;
 452                         info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 453                         info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 454                         info->bmiColors[i].rgbReserved = 0;
 455                     }
 456                     else ((WORD *)info->bmiColors)[i] = (WORD)i;
 457                 }
 458                 GDI_ReleaseObj( dc->hPalette );
 459             } else {
 460                 switch (info->bmiHeader.biBitCount) {
 461                 case 1:
 462                     info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 463                         info->bmiColors[0].rgbBlue = 0;
 464                     info->bmiColors[0].rgbReserved = 0;
 465                     info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 466                         info->bmiColors[1].rgbBlue = 0xff;
 467                     info->bmiColors[1].rgbReserved = 0;
 468                     break;
 469
 470                 case 4:
 471                     memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 472                     break;
 473
 474                 case 8:
 475                     {
 476                         INT r, g, b;
 477                         RGBQUAD *color;
 478
 479                         memcpy(info->bmiColors, DefLogPalette,
 480                                10 * sizeof(RGBQUAD));
 481                         memcpy(info->bmiColors + 246, DefLogPalette + 10,
 482                                10 * sizeof(RGBQUAD));
 483                         color = info->bmiColors + 10;
 484                         for(r = 0; r <= 5; r++) /* FIXME */
 485                             for(g = 0; g <= 5; g++)
 486                                 for(b = 0; b <= 5; b++) {
 487                                     color->rgbRed =   (r * 0xff) / 5;
 488                                     color->rgbGreen = (g * 0xff) / 5;
 489                                     color->rgbBlue =  (b * 0xff) / 5;
 490                                     color->rgbReserved = 0;
 491                                     color++;
 492                                 }
 493                     }
 494                 }
 495             }
 496         }
 497     }
 498
 499     if (bits && lines)
 500     {
 501         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 502         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 503         {
 504             /*FIXME: Only RGB dibs supported for now */
 505             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 506             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 507             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 508             unsigned int x, y;
 509
 510             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 511             {
 512                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 513                 dstwidthb = -dstwidthb;
 514             }
 515
 516             switch( info->bmiHeader.biBitCount ) {
 517
 518             case 15:
 519             case 16: /* 16 bpp dstDIB */
 520                 {
 521                     LPWORD dstbits = (LPWORD)dbits;
 522                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 523
 524                     /* FIXME: BI_BITFIELDS not supported yet */
 525
 526                     switch(bmp->dib->dsBm.bmBitsPixel) {
 527
 528                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 529                         {
 530                             /* FIXME: BI_BITFIELDS not supported yet */
 531                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 532                                 memcpy(dbits, sbits, srcwidthb);
 533                         }
 534                         break;
 535
 536                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 537                         {
 538                             LPBYTE srcbits = sbits;
 539
 540                             for( y = 0; y < lines; y++) {
 541                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 542                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 543                                                  (((WORD)srcbits[1] << 2) & gmask) |
 544                                                  (((WORD)srcbits[2] << 7) & rmask);
 545
 546                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 547                                 srcbits = (sbits += srcwidthb);
 548                             }
 549                         }
 550                         break;
 551
 552                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 553                         {
 554                             LPDWORD srcbits = (LPDWORD)sbits;
 555                             DWORD val;
 556
 557                             for( y = 0; y < lines; y++) {
 558                                 for( x = 0; x < srcwidth; x++ ) {
 559                                     val = *srcbits++;
 560                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 561                                                        ((val >> 9) & rmask));
 562                                 }
 563                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 564                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 565                             }
 566                         }
 567                         break;
 568
 569                     default: /* ? bit bmp -> 16 bit DIB */
 570                         FIXME("15/16 bit DIB %d bit bitmap\n",
 571                         bmp->bitmap.bmBitsPixel);
 572                         break;
 573                     }
 574                 }
 575                 break;
 576
 577             case 24: /* 24 bpp dstDIB */
 578                 {
 579                     LPBYTE dstbits = dbits;
 580
 581                     switch(bmp->dib->dsBm.bmBitsPixel) {
 582
 583                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 584                         {
 585                             LPWORD srcbits = (LPWORD)sbits;
 586                             WORD val;
 587
 588                             /* FIXME: BI_BITFIELDS not supported yet */
 589                             for( y = 0; y < lines; y++) {
 590                                 for( x = 0; x < srcwidth; x++ ) {
 591                                     val = *srcbits++;
 592                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 593                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 594                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 595                                 }
 596                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 597                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 598                             }
 599                         }
 600                         break;
 601
 602                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 603                         {
 604                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 605                                 memcpy(dbits, sbits, srcwidthb);
 606                         }
 607                         break;
 608
 609                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 610                         {
 611                             LPBYTE srcbits = (LPBYTE)sbits;
 612
 613                             for( y = 0; y < lines; y++) {
 614                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 615                                     *dstbits++ = *srcbits++;
 616                                     *dstbits++ = *srcbits++;
 617                                     *dstbits++ = *srcbits++;
 618                                 }
 619                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 620                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 621                             }
 622                         }
 623                         break;
 624
 625                     default: /* ? bit bmp -> 24 bit DIB */
 626                         FIXME("24 bit DIB %d bit bitmap\n",
 627                               bmp->bitmap.bmBitsPixel);
 628                         break;
 629                     }
 630                 }
 631                 break;
 632
 633             case 32: /* 32 bpp dstDIB */
 634                 {
 635                     LPDWORD dstbits = (LPDWORD)dbits;
 636
 637                     /* FIXME: BI_BITFIELDS not supported yet */
 638
 639                     switch(bmp->dib->dsBm.bmBitsPixel) {
 640                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 641                         {
 642                             LPWORD srcbits = (LPWORD)sbits;
 643                             DWORD val;
 644
 645                             /* FIXME: BI_BITFIELDS not supported yet */
 646                             for( y = 0; y < lines; y++) {
 647                                 for( x = 0; x < srcwidth; x++ ) {
 648                                     val = (DWORD)*srcbits++;
 649                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 650                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 651                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 652                                 }
 653                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 654                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 655                             }
 656                         }
 657                         break;
 658
 659                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 660                         {
 661                             LPBYTE srcbits = sbits;
 662
 663                             for( y = 0; y < lines; y++) {
 664                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 665                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 666                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 667                                 srcbits=(sbits+=srcwidthb);
 668                             }
 669                         }
 670                         break;
 671
 672                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 673                         {
 674                             /* FIXME: BI_BITFIELDS not supported yet */
 675                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 676                                 memcpy(dbits, sbits, srcwidthb);
 677                         }
 678                         break;
 679
 680                     default: /* ? bit bmp -> 32 bit DIB */
 681                         FIXME("32 bit DIB %d bit bitmap\n",
 682                         bmp->bitmap.bmBitsPixel);
 683                         break;
 684                     }
 685                 }
 686                 break;
 687
 688             default: /* ? bit DIB */
 689                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 690                 break;
 691             }
 692         }
 693         /* Otherwise, get bits from the XImage */
 694         else
 695         {
 696             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 697             else
 698             {
 699                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 700                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 701                                                     lines, bits, info, coloruse );
 702                 else
 703                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 704             }
 705         }
 706     }
 707     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 708     {
 709         /* fill in struct members */
 710
 711         if( info->bmiHeader.biBitCount == 0)
 712         {
 713             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 714             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 715             info->bmiHeader.biPlanes = 1;
 716             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 717             info->bmiHeader.biSizeImage =
 718                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 719                                                    bmp->bitmap.bmHeight,
 720                                                    bmp->bitmap.bmBitsPixel );
 721             info->bmiHeader.biCompression = 0;
 722         }
 723         else
 724         {
 725             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 726                                                info->bmiHeader.biWidth,
 727                                                info->bmiHeader.biHeight,
 728                                                info->bmiHeader.biBitCount );
 729         }
 730     }
 731
 732     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 733           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 734           info->bmiHeader.biHeight);
 735
 736     GDI_ReleaseObj( hdc );
 737     GDI_ReleaseObj( hbitmap );
 738
 739     return lines;
 740 }
 741
 742
 743 /***********************************************************************
 744  *           CreateDIBitmap    (GDI32.@)
 745  */
 746 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 747                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 748                             UINT coloruse )
 749 {
 750     HBITMAP handle;
 751     BOOL fColor;
 752     DWORD width;
 753     int height;
 754     WORD bpp;
 755     WORD compr;
 756     DC *dc;
 757
 758     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 759     if (height < 0) height = -height;
 760
 761     /* Check if we should create a monochrome or color bitmap. */
 762     /* We create a monochrome bitmap only if it has exactly 2  */
 763     /* colors, which are black followed by white, nothing else.  */
 764     /* In all other cases, we create a color bitmap.           */
 765
 766     if (bpp != 1) fColor = TRUE;
 767     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 768     else
 769     {
 770         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 771         {
 772             RGBQUAD *rgb = data->bmiColors;
 773             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 774
 775             /* Check if the first color of the colormap is black */
 776             if ((col == RGB(0,0,0)))
 777             {
 778                 rgb++;
 779                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 780                 /* If the second color is white, create a monochrome bitmap */
 781                 fColor =  (col != RGB(0xff,0xff,0xff));
 782             }
 783             /* Note : If the first color of the colormap is white
 784                followed by black, we have to create a color bitmap.
 785                If we don't the white will be displayed in black later on!*/
 786             else fColor = TRUE;
 787         }
 788         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 789         {
 790             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 791             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 792             if ((col == RGB(0,0,0)))
 793             {
 794                 rgb++;
 795                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 796                 fColor = (col != RGB(0xff,0xff,0xff));
 797             }
 798             else fColor = TRUE;
 799         }
 800         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 801         { /* FIXME: correct ? */
 802             RGBQUAD *rgb = data->bmiColors;
 803             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 804
 805             /* Check if the first color of the colormap is black */
 806             if ((col == RGB(0,0,0)))
 807             {
 808                 rgb++;
 809                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 810                 /* If the second color is white, create a monochrome bitmap */
 811                 fColor =  (col != RGB(0xff,0xff,0xff));
 812             }
 813             /* Note : If the first color of the colormap is white
 814                followed by black, we have to create a color bitmap.
 815                If we don't the white will be displayed in black later on!*/
 816             else fColor = TRUE;
 817         }
 818         else
 819         {
 820             ERR("(%ld): wrong/unknown size for data\n",
 821                      data->bmiHeader.biSize );
 822             return 0;
 823         }
 824     }
 825
 826     /* Now create the bitmap */
 827
 828     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 829
 830     if (fColor)
 831         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 832                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 833     else handle = CreateBitmap( width, height, 1, 1, NULL );
 834
 835     if (handle)
 836     {
 837         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 838         else if (!BITMAP_SetOwnerDC( handle, dc ))
 839         {
 840             DeleteObject( handle );
 841             handle = 0;
 842         }
 843     }
 844
 845     GDI_ReleaseObj( hdc );
 846     return handle;
 847 }
 848
 849 /***********************************************************************
 850  *           CreateDIBSection    (GDI.489)
 851  */
 852 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, const BITMAPINFO *bmi, UINT16 usage,
 853                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 854 {
 855     LPVOID bits32;
 856     HBITMAP hbitmap;
 857
 858     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 859     if (hbitmap)
 860     {
 861         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 862         if (bmp && bmp->dib && bits32)
 863         {
 864             const BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 865             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 866             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 867             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 868                          bi->biSizeImage : width_bytes * height;
 869
 870             /* calculate number of sel's needed for size with 64K steps */
 871             WORD count = (size + 0xffff) / 0x10000;
 872             WORD sel = AllocSelectorArray16(count);
 873             int i;
 874
 875             for (i = 0; i < count; i++)
 876             {
 877                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 878                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 879                 size -= 0x10000;
 880             }
 881             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 882             if (bits16) *bits16 = bmp->segptr_bits;
 883         }
 884         if (bmp) GDI_ReleaseObj( hbitmap );
 885     }
 886     return HBITMAP_16(hbitmap);
 887 }
 888
 889 /***********************************************************************
 890  *           DIB_CreateDIBSection
 891  */
 892 HBITMAP DIB_CreateDIBSection(HDC hdc, const BITMAPINFO *bmi, UINT usage,
 893                              VOID **bits, HANDLE section,
 894                              DWORD offset, DWORD ovr_pitch)
 895 {
 896     HBITMAP hbitmap = 0;
 897     DC *dc;
 898     BOOL bDesktopDC = FALSE;
 899
 900     /* If the reference hdc is null, take the desktop dc */
 901     if (hdc == 0)
 902     {
 903         hdc = CreateCompatibleDC(0);
 904         bDesktopDC = TRUE;
 905     }
 906
 907     if ((dc = DC_GetDCPtr( hdc )))
 908     {
 909         if(dc->funcs->pCreateDIBSection)
 910             hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 911         GDI_ReleaseObj(hdc);
 912     }
 913
 914     if (bDesktopDC)
 915       DeleteDC(hdc);
 916
 917     return hbitmap;
 918 }
 919
 920 /***********************************************************************
 921  *           CreateDIBSection    (GDI32.@)
 922  */
 923 HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
 924                                 VOID **bits, HANDLE section,
 925                                 DWORD offset)
 926 {
 927     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 928 }