dlls/gdi/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://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp
  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://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp
 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             unsigned int dstwidth = info->bmiHeader.biWidth;
 526             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 527             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 528             unsigned int x, y, width, widthb;
 529
 530             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 531             {
 532                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 533                 dstwidthb = -dstwidthb;
 534             }
 535
 536             switch( info->bmiHeader.biBitCount ) {
 537
 538             case 15:
 539             case 16: /* 16 bpp dstDIB */
 540                 {
 541                     LPWORD dstbits = (LPWORD)dbits;
 542                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 543
 544                     /* FIXME: BI_BITFIELDS not supported yet */
 545
 546                     switch(bmp->dib->dsBm.bmBitsPixel) {
 547
 548                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 549                         {
 550                             widthb = min(srcwidthb, abs(dstwidthb));
 551                             /* FIXME: BI_BITFIELDS not supported yet */
 552                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 553                                 memcpy(dbits, sbits, widthb);
 554                         }
 555                         break;
 556
 557                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 558                         {
 559                             LPBYTE srcbits = sbits;
 560
 561                             width = min(srcwidth, dstwidth);
 562                             for( y = 0; y < lines; y++) {
 563                                 for( x = 0; x < width; x++, srcbits += 3)
 564                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 565                                                  (((WORD)srcbits[1] << 2) & gmask) |
 566                                                  (((WORD)srcbits[2] << 7) & rmask);
 567
 568                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 569                                 srcbits = (sbits += srcwidthb);
 570                             }
 571                         }
 572                         break;
 573
 574                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 575                         {
 576                             LPDWORD srcbits = (LPDWORD)sbits;
 577                             DWORD val;
 578
 579                             width = min(srcwidth, dstwidth);
 580                             for( y = 0; y < lines; y++) {
 581                                 for( x = 0; x < width; x++ ) {
 582                                     val = *srcbits++;
 583                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 584                                                        ((val >> 9) & rmask));
 585                                 }
 586                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 587                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 588                             }
 589                         }
 590                         break;
 591
 592                     default: /* ? bit bmp -> 16 bit DIB */
 593                         FIXME("15/16 bit DIB %d bit bitmap\n",
 594                         bmp->bitmap.bmBitsPixel);
 595                         break;
 596                     }
 597                 }
 598                 break;
 599
 600             case 24: /* 24 bpp dstDIB */
 601                 {
 602                     LPBYTE dstbits = dbits;
 603
 604                     switch(bmp->dib->dsBm.bmBitsPixel) {
 605
 606                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 607                         {
 608                             LPWORD srcbits = (LPWORD)sbits;
 609                             WORD val;
 610
 611                             width = min(srcwidth, dstwidth);
 612                             /* FIXME: BI_BITFIELDS not supported yet */
 613                             for( y = 0; y < lines; y++) {
 614                                 for( x = 0; x < width; x++ ) {
 615                                     val = *srcbits++;
 616                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 617                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 618                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 619                                 }
 620                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 621                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 622                             }
 623                         }
 624                         break;
 625
 626                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 627                         {
 628                             widthb = min(srcwidthb, abs(dstwidthb));
 629                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 630                                 memcpy(dbits, sbits, widthb);
 631                         }
 632                         break;
 633
 634                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 635                         {
 636                             LPBYTE srcbits = (LPBYTE)sbits;
 637
 638                             width = min(srcwidth, dstwidth);
 639                             for( y = 0; y < lines; y++) {
 640                                 for( x = 0; x < width; x++, srcbits++ ) {
 641                                     *dstbits++ = *srcbits++;
 642                                     *dstbits++ = *srcbits++;
 643                                     *dstbits++ = *srcbits++;
 644                                 }
 645                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 646                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 647                             }
 648                         }
 649                         break;
 650
 651                     default: /* ? bit bmp -> 24 bit DIB */
 652                         FIXME("24 bit DIB %d bit bitmap\n",
 653                               bmp->bitmap.bmBitsPixel);
 654                         break;
 655                     }
 656                 }
 657                 break;
 658
 659             case 32: /* 32 bpp dstDIB */
 660                 {
 661                     LPDWORD dstbits = (LPDWORD)dbits;
 662
 663                     /* FIXME: BI_BITFIELDS not supported yet */
 664
 665                     switch(bmp->dib->dsBm.bmBitsPixel) {
 666                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 667                         {
 668                             LPWORD srcbits = (LPWORD)sbits;
 669                             DWORD val;
 670
 671                             width = min(srcwidth, dstwidth);
 672                             /* FIXME: BI_BITFIELDS not supported yet */
 673                             for( y = 0; y < lines; y++) {
 674                                 for( x = 0; x < width; x++ ) {
 675                                     val = (DWORD)*srcbits++;
 676                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 677                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 678                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 679                                 }
 680                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 681                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 682                             }
 683                         }
 684                         break;
 685
 686                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 687                         {
 688                             LPBYTE srcbits = sbits;
 689
 690                             width = min(srcwidth, dstwidth);
 691                             for( y = 0; y < lines; y++) {
 692                                 for( x = 0; x < width; x++, srcbits+=3 )
 693                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 694                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 695                                 srcbits=(sbits+=srcwidthb);
 696                             }
 697                         }
 698                         break;
 699
 700                     case 32: /* 32 bpp srcDIB -> 32 bpp dstDIB */
 701                         {
 702                             widthb = min(srcwidthb, abs(dstwidthb));
 703                             /* FIXME: BI_BITFIELDS not supported yet */
 704                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) {
 705                                 memcpy(dbits, sbits, widthb);
 706                             }
 707                         }
 708                         break;
 709
 710                     default: /* ? bit bmp -> 32 bit DIB */
 711                         FIXME("32 bit DIB %d bit bitmap\n",
 712                         bmp->bitmap.bmBitsPixel);
 713                         break;
 714                     }
 715                 }
 716                 break;
 717
 718             default: /* ? bit DIB */
 719                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 720                 break;
 721             }
 722         }
 723         /* Otherwise, get bits from the XImage */
 724         else
 725         {
 726             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 727             else
 728             {
 729                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 730                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 731                                                     lines, bits, info, coloruse );
 732                 else
 733                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 734             }
 735         }
 736     }
 737     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 738     {
 739         /* fill in struct members */
 740
 741         if( info->bmiHeader.biBitCount == 0)
 742         {
 743             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 744             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 745             info->bmiHeader.biPlanes = 1;
 746             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 747             info->bmiHeader.biSizeImage =
 748                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 749                                                    bmp->bitmap.bmHeight,
 750                                                    bmp->bitmap.bmBitsPixel );
 751             info->bmiHeader.biCompression = 0;
 752         }
 753         else
 754         {
 755             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 756                                                info->bmiHeader.biWidth,
 757                                                info->bmiHeader.biHeight,
 758                                                info->bmiHeader.biBitCount );
 759         }
 760         lines = info->bmiHeader.biHeight;
 761     }
 762
 763     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 764           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 765           info->bmiHeader.biHeight);
 766
 767     GDI_ReleaseObj( hdc );
 768     GDI_ReleaseObj( hbitmap );
 769     DeleteDC(memdc);
 770     return lines;
 771 }
 772
 773
 774 /***********************************************************************
 775  *           CreateDIBitmap    (GDI32.@)
 776  */
 777 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 778                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 779                             UINT coloruse )
 780 {
 781     HBITMAP handle;
 782     BOOL fColor;
 783     DWORD width;
 784     int height;
 785     WORD bpp;
 786     WORD compr;
 787     DC *dc;
 788
 789     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 790     if (height < 0) height = -height;
 791
 792     /* Check if we should create a monochrome or color bitmap. */
 793     /* We create a monochrome bitmap only if it has exactly 2  */
 794     /* colors, which are black followed by white, nothing else.  */
 795     /* In all other cases, we create a color bitmap.           */
 796
 797     if (bpp != 1) fColor = TRUE;
 798     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 799     else
 800     {
 801         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 802         {
 803             RGBQUAD *rgb = data->bmiColors;
 804             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 805
 806             /* Check if the first color of the colormap is black */
 807             if ((col == RGB(0,0,0)))
 808             {
 809                 rgb++;
 810                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 811                 /* If the second color is white, create a monochrome bitmap */
 812                 fColor =  (col != RGB(0xff,0xff,0xff));
 813             }
 814             /* Note : If the first color of the colormap is white
 815                followed by black, we have to create a color bitmap.
 816                If we don't the white will be displayed in black later on!*/
 817             else fColor = TRUE;
 818         }
 819         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 820         {
 821             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 822             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 823             if ((col == RGB(0,0,0)))
 824             {
 825                 rgb++;
 826                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 827                 fColor = (col != RGB(0xff,0xff,0xff));
 828             }
 829             else fColor = TRUE;
 830         }
 831         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 832         { /* FIXME: correct ? */
 833             RGBQUAD *rgb = data->bmiColors;
 834             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 835
 836             /* Check if the first color of the colormap is black */
 837             if ((col == RGB(0,0,0)))
 838             {
 839                 rgb++;
 840                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 841                 /* If the second color is white, create a monochrome bitmap */
 842                 fColor =  (col != RGB(0xff,0xff,0xff));
 843             }
 844             /* Note : If the first color of the colormap is white
 845                followed by black, we have to create a color bitmap.
 846                If we don't the white will be displayed in black later on!*/
 847             else fColor = TRUE;
 848         }
 849         else
 850         {
 851             ERR("(%ld): wrong/unknown size for data\n",
 852                      data->bmiHeader.biSize );
 853             return 0;
 854         }
 855     }
 856
 857     /* Now create the bitmap */
 858
 859     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 860
 861     if (fColor)
 862         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 863                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 864     else handle = CreateBitmap( width, height, 1, 1, NULL );
 865
 866     if (handle)
 867     {
 868         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 869         else if (!BITMAP_SetOwnerDC( handle, dc ))
 870         {
 871             DeleteObject( handle );
 872             handle = 0;
 873         }
 874     }
 875
 876     GDI_ReleaseObj( hdc );
 877     return handle;
 878 }
 879
 880 /***********************************************************************
 881  *           CreateDIBSection    (GDI.489)
 882  */
 883 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, const BITMAPINFO *bmi, UINT16 usage,
 884                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 885 {
 886     LPVOID bits32;
 887     HBITMAP hbitmap;
 888
 889     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 890     if (hbitmap)
 891     {
 892         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 893         if (bmp && bmp->dib && bits32)
 894         {
 895             const BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 896             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 897             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 898             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 899                          bi->biSizeImage : width_bytes * height;
 900
 901             /* calculate number of sel's needed for size with 64K steps */
 902             WORD count = (size + 0xffff) / 0x10000;
 903             WORD sel = AllocSelectorArray16(count);
 904             int i;
 905
 906             for (i = 0; i < count; i++)
 907             {
 908                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 909                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 910                 size -= 0x10000;
 911             }
 912             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 913             if (bits16) *bits16 = bmp->segptr_bits;
 914         }
 915         if (bmp) GDI_ReleaseObj( hbitmap );
 916     }
 917     return HBITMAP_16(hbitmap);
 918 }
 919
 920 /***********************************************************************
 921  *           DIB_CreateDIBSection
 922  */
 923 HBITMAP DIB_CreateDIBSection(HDC hdc, const BITMAPINFO *bmi, UINT usage,
 924                              VOID **bits, HANDLE section,
 925                              DWORD offset, DWORD ovr_pitch)
 926 {
 927     HBITMAP hbitmap = 0;
 928     DC *dc;
 929     BOOL bDesktopDC = FALSE;
 930
 931     /* If the reference hdc is null, take the desktop dc */
 932     if (hdc == 0)
 933     {
 934         hdc = CreateCompatibleDC(0);
 935         bDesktopDC = TRUE;
 936     }
 937
 938     if ((dc = DC_GetDCPtr( hdc )))
 939     {
 940         if(dc->funcs->pCreateDIBSection)
 941             hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 942         GDI_ReleaseObj(hdc);
 943     }
 944
 945     if (bDesktopDC)
 946       DeleteDC(hdc);
 947
 948     return hbitmap;
 949 }
 950
 951 /***********************************************************************
 952  *           CreateDIBSection    (GDI32.@)
 953  */
 954 HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
 955                                 VOID **bits, HANDLE section,
 956                                 DWORD offset)
 957 {
 958     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 959 }