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     HDC memdc;
 419
 420     if (!info) return 0;
 421     memdc = CreateCompatibleDC(hdc);
 422     if (!(dc = DC_GetDCUpdate( hdc )))
 423     {
 424         DeleteDC(memdc);
 425         return 0;
 426     }
 427     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 428     {
 429         GDI_ReleaseObj( hdc );
 430         DeleteDC(memdc);
 431         return 0;
 432     }
 433
 434     /* Transfer color info */
 435
 436     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 437
 438         info->bmiHeader.biClrUsed = 0;
 439
 440         /* If the bitmap object already has a dib section at the
 441            same color depth then get the color map from it */
 442         if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
 443             if(coloruse == DIB_RGB_COLORS) {
 444                 HBITMAP oldbm;
 445                 oldbm = SelectObject(memdc, hbitmap);
 446                 GetDIBColorTable(memdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
 447                 SelectObject(memdc, oldbm);
 448             }
 449             else {
 450                 WORD *index = (WORD*)info->bmiColors;
 451                 int i;
 452                 for(i = 0; i < 1 << info->bmiHeader.biBitCount; i++, index++)
 453                     *index = i;
 454             }
 455         }
 456         else {
 457             if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 458                 /* Generate the color map from the selected palette */
 459                 PALETTEENTRY * palEntry;
 460                 PALETTEOBJ * palette;
 461                 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
 462                     GDI_ReleaseObj( hdc );
 463                     GDI_ReleaseObj( hbitmap );
 464                     DeleteDC(memdc);
 465                     return 0;
 466                 }
 467                 palEntry = palette->logpalette.palPalEntry;
 468                 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 469                     if (coloruse == DIB_RGB_COLORS) {
 470                         info->bmiColors[i].rgbRed      = palEntry->peRed;
 471                         info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 472                         info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 473                         info->bmiColors[i].rgbReserved = 0;
 474                     }
 475                     else ((WORD *)info->bmiColors)[i] = (WORD)i;
 476                 }
 477                 GDI_ReleaseObj( dc->hPalette );
 478             } else {
 479                 switch (info->bmiHeader.biBitCount) {
 480                 case 1:
 481                     info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 482                         info->bmiColors[0].rgbBlue = 0;
 483                     info->bmiColors[0].rgbReserved = 0;
 484                     info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 485                         info->bmiColors[1].rgbBlue = 0xff;
 486                     info->bmiColors[1].rgbReserved = 0;
 487                     break;
 488
 489                 case 4:
 490                     memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 491                     break;
 492
 493                 case 8:
 494                     {
 495                         INT r, g, b;
 496                         RGBQUAD *color;
 497
 498                         memcpy(info->bmiColors, DefLogPalette,
 499                                10 * sizeof(RGBQUAD));
 500                         memcpy(info->bmiColors + 246, DefLogPalette + 10,
 501                                10 * sizeof(RGBQUAD));
 502                         color = info->bmiColors + 10;
 503                         for(r = 0; r <= 5; r++) /* FIXME */
 504                             for(g = 0; g <= 5; g++)
 505                                 for(b = 0; b <= 5; b++) {
 506                                     color->rgbRed =   (r * 0xff) / 5;
 507                                     color->rgbGreen = (g * 0xff) / 5;
 508                                     color->rgbBlue =  (b * 0xff) / 5;
 509                                     color->rgbReserved = 0;
 510                                     color++;
 511                                 }
 512                     }
 513                 }
 514             }
 515         }
 516     }
 517
 518     if (bits && lines)
 519     {
 520         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 521         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 522         {
 523             /*FIXME: Only RGB dibs supported for now */
 524             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 525             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 526             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 527             unsigned int x, y;
 528
 529             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 530             {
 531                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 532                 dstwidthb = -dstwidthb;
 533             }
 534
 535             switch( info->bmiHeader.biBitCount ) {
 536
 537             case 15:
 538             case 16: /* 16 bpp dstDIB */
 539                 {
 540                     LPWORD dstbits = (LPWORD)dbits;
 541                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 542
 543                     /* FIXME: BI_BITFIELDS not supported yet */
 544
 545                     switch(bmp->dib->dsBm.bmBitsPixel) {
 546
 547                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 548                         {
 549                             /* FIXME: BI_BITFIELDS not supported yet */
 550                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 551                                 memcpy(dbits, sbits, srcwidthb);
 552                         }
 553                         break;
 554
 555                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 556                         {
 557                             LPBYTE srcbits = sbits;
 558
 559                             for( y = 0; y < lines; y++) {
 560                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 561                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 562                                                  (((WORD)srcbits[1] << 2) & gmask) |
 563                                                  (((WORD)srcbits[2] << 7) & rmask);
 564
 565                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 566                                 srcbits = (sbits += srcwidthb);
 567                             }
 568                         }
 569                         break;
 570
 571                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 572                         {
 573                             LPDWORD srcbits = (LPDWORD)sbits;
 574                             DWORD val;
 575
 576                             for( y = 0; y < lines; y++) {
 577                                 for( x = 0; x < srcwidth; x++ ) {
 578                                     val = *srcbits++;
 579                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 580                                                        ((val >> 9) & rmask));
 581                                 }
 582                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 583                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 584                             }
 585                         }
 586                         break;
 587
 588                     default: /* ? bit bmp -> 16 bit DIB */
 589                         FIXME("15/16 bit DIB %d bit bitmap\n",
 590                         bmp->bitmap.bmBitsPixel);
 591                         break;
 592                     }
 593                 }
 594                 break;
 595
 596             case 24: /* 24 bpp dstDIB */
 597                 {
 598                     LPBYTE dstbits = dbits;
 599
 600                     switch(bmp->dib->dsBm.bmBitsPixel) {
 601
 602                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 603                         {
 604                             LPWORD srcbits = (LPWORD)sbits;
 605                             WORD val;
 606
 607                             /* FIXME: BI_BITFIELDS not supported yet */
 608                             for( y = 0; y < lines; y++) {
 609                                 for( x = 0; x < srcwidth; x++ ) {
 610                                     val = *srcbits++;
 611                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 612                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 613                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 614                                 }
 615                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 616                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 617                             }
 618                         }
 619                         break;
 620
 621                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 622                         {
 623                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 624                                 memcpy(dbits, sbits, srcwidthb);
 625                         }
 626                         break;
 627
 628                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 629                         {
 630                             LPBYTE srcbits = (LPBYTE)sbits;
 631
 632                             for( y = 0; y < lines; y++) {
 633                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 634                                     *dstbits++ = *srcbits++;
 635                                     *dstbits++ = *srcbits++;
 636                                     *dstbits++ = *srcbits++;
 637                                 }
 638                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 639                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 640                             }
 641                         }
 642                         break;
 643
 644                     default: /* ? bit bmp -> 24 bit DIB */
 645                         FIXME("24 bit DIB %d bit bitmap\n",
 646                               bmp->bitmap.bmBitsPixel);
 647                         break;
 648                     }
 649                 }
 650                 break;
 651
 652             case 32: /* 32 bpp dstDIB */
 653                 {
 654                     LPDWORD dstbits = (LPDWORD)dbits;
 655
 656                     /* FIXME: BI_BITFIELDS not supported yet */
 657
 658                     switch(bmp->dib->dsBm.bmBitsPixel) {
 659                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 660                         {
 661                             LPWORD srcbits = (LPWORD)sbits;
 662                             DWORD val;
 663
 664                             /* FIXME: BI_BITFIELDS not supported yet */
 665                             for( y = 0; y < lines; y++) {
 666                                 for( x = 0; x < srcwidth; x++ ) {
 667                                     val = (DWORD)*srcbits++;
 668                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 669                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 670                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 671                                 }
 672                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 673                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 674                             }
 675                         }
 676                         break;
 677
 678                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 679                         {
 680                             LPBYTE srcbits = sbits;
 681
 682                             for( y = 0; y < lines; y++) {
 683                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 684                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 685                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 686                                 srcbits=(sbits+=srcwidthb);
 687                             }
 688                         }
 689                         break;
 690
 691                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 692                         {
 693                             /* FIXME: BI_BITFIELDS not supported yet */
 694                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 695                                 memcpy(dbits, sbits, srcwidthb);
 696                         }
 697                         break;
 698
 699                     default: /* ? bit bmp -> 32 bit DIB */
 700                         FIXME("32 bit DIB %d bit bitmap\n",
 701                         bmp->bitmap.bmBitsPixel);
 702                         break;
 703                     }
 704                 }
 705                 break;
 706
 707             default: /* ? bit DIB */
 708                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 709                 break;
 710             }
 711         }
 712         /* Otherwise, get bits from the XImage */
 713         else
 714         {
 715             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 716             else
 717             {
 718                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 719                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 720                                                     lines, bits, info, coloruse );
 721                 else
 722                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 723             }
 724         }
 725     }
 726     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 727     {
 728         /* fill in struct members */
 729
 730         if( info->bmiHeader.biBitCount == 0)
 731         {
 732             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 733             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 734             info->bmiHeader.biPlanes = 1;
 735             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 736             info->bmiHeader.biSizeImage =
 737                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 738                                                    bmp->bitmap.bmHeight,
 739                                                    bmp->bitmap.bmBitsPixel );
 740             info->bmiHeader.biCompression = 0;
 741         }
 742         else
 743         {
 744             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 745                                                info->bmiHeader.biWidth,
 746                                                info->bmiHeader.biHeight,
 747                                                info->bmiHeader.biBitCount );
 748         }
 749     }
 750
 751     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 752           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 753           info->bmiHeader.biHeight);
 754
 755     GDI_ReleaseObj( hdc );
 756     GDI_ReleaseObj( hbitmap );
 757     DeleteDC(memdc);
 758     return lines;
 759 }
 760
 761
 762 /***********************************************************************
 763  *           CreateDIBitmap    (GDI32.@)
 764  */
 765 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 766                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 767                             UINT coloruse )
 768 {
 769     HBITMAP handle;
 770     BOOL fColor;
 771     DWORD width;
 772     int height;
 773     WORD bpp;
 774     WORD compr;
 775     DC *dc;
 776
 777     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 778     if (height < 0) height = -height;
 779
 780     /* Check if we should create a monochrome or color bitmap. */
 781     /* We create a monochrome bitmap only if it has exactly 2  */
 782     /* colors, which are black followed by white, nothing else.  */
 783     /* In all other cases, we create a color bitmap.           */
 784
 785     if (bpp != 1) fColor = TRUE;
 786     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 787     else
 788     {
 789         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 790         {
 791             RGBQUAD *rgb = data->bmiColors;
 792             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 793
 794             /* Check if the first color of the colormap is black */
 795             if ((col == RGB(0,0,0)))
 796             {
 797                 rgb++;
 798                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 799                 /* If the second color is white, create a monochrome bitmap */
 800                 fColor =  (col != RGB(0xff,0xff,0xff));
 801             }
 802             /* Note : If the first color of the colormap is white
 803                followed by black, we have to create a color bitmap.
 804                If we don't the white will be displayed in black later on!*/
 805             else fColor = TRUE;
 806         }
 807         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 808         {
 809             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 810             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 811             if ((col == RGB(0,0,0)))
 812             {
 813                 rgb++;
 814                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 815                 fColor = (col != RGB(0xff,0xff,0xff));
 816             }
 817             else fColor = TRUE;
 818         }
 819         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 820         { /* FIXME: correct ? */
 821             RGBQUAD *rgb = data->bmiColors;
 822             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 823
 824             /* Check if the first color of the colormap is black */
 825             if ((col == RGB(0,0,0)))
 826             {
 827                 rgb++;
 828                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 829                 /* If the second color is white, create a monochrome bitmap */
 830                 fColor =  (col != RGB(0xff,0xff,0xff));
 831             }
 832             /* Note : If the first color of the colormap is white
 833                followed by black, we have to create a color bitmap.
 834                If we don't the white will be displayed in black later on!*/
 835             else fColor = TRUE;
 836         }
 837         else
 838         {
 839             ERR("(%ld): wrong/unknown size for data\n",
 840                      data->bmiHeader.biSize );
 841             return 0;
 842         }
 843     }
 844
 845     /* Now create the bitmap */
 846
 847     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 848
 849     if (fColor)
 850         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 851                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 852     else handle = CreateBitmap( width, height, 1, 1, NULL );
 853
 854     if (handle)
 855     {
 856         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 857         else if (!BITMAP_SetOwnerDC( handle, dc ))
 858         {
 859             DeleteObject( handle );
 860             handle = 0;
 861         }
 862     }
 863
 864     GDI_ReleaseObj( hdc );
 865     return handle;
 866 }
 867
 868 /***********************************************************************
 869  *           CreateDIBSection    (GDI.489)
 870  */
 871 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, const BITMAPINFO *bmi, UINT16 usage,
 872                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 873 {
 874     LPVOID bits32;
 875     HBITMAP hbitmap;
 876
 877     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 878     if (hbitmap)
 879     {
 880         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 881         if (bmp && bmp->dib && bits32)
 882         {
 883             const BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 884             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 885             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 886             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 887                          bi->biSizeImage : width_bytes * height;
 888
 889             /* calculate number of sel's needed for size with 64K steps */
 890             WORD count = (size + 0xffff) / 0x10000;
 891             WORD sel = AllocSelectorArray16(count);
 892             int i;
 893
 894             for (i = 0; i < count; i++)
 895             {
 896                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 897                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 898                 size -= 0x10000;
 899             }
 900             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 901             if (bits16) *bits16 = bmp->segptr_bits;
 902         }
 903         if (bmp) GDI_ReleaseObj( hbitmap );
 904     }
 905     return HBITMAP_16(hbitmap);
 906 }
 907
 908 /***********************************************************************
 909  *           DIB_CreateDIBSection
 910  */
 911 HBITMAP DIB_CreateDIBSection(HDC hdc, const BITMAPINFO *bmi, UINT usage,
 912                              VOID **bits, HANDLE section,
 913                              DWORD offset, DWORD ovr_pitch)
 914 {
 915     HBITMAP hbitmap = 0;
 916     DC *dc;
 917     BOOL bDesktopDC = FALSE;
 918
 919     /* If the reference hdc is null, take the desktop dc */
 920     if (hdc == 0)
 921     {
 922         hdc = CreateCompatibleDC(0);
 923         bDesktopDC = TRUE;
 924     }
 925
 926     if ((dc = DC_GetDCPtr( hdc )))
 927     {
 928         if(dc->funcs->pCreateDIBSection)
 929             hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 930         GDI_ReleaseObj(hdc);
 931     }
 932
 933     if (bDesktopDC)
 934       DeleteDC(hdc);
 935
 936     return hbitmap;
 937 }
 938
 939 /***********************************************************************
 940  *           CreateDIBSection    (GDI32.@)
 941  */
 942 HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
 943                                 VOID **bits, HANDLE section,
 944                                 DWORD offset)
 945 {
 946     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 947 }