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 "bitmap.h"
  28 #include "selectors.h"
  29 #include "gdi.h"
  30 #include "wownt32.h"
  31 #include "wine/debug.h"
  32 #include "palette.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  35
  36 /***********************************************************************
  37  *           DIB_GetDIBWidthBytes
  38  *
  39  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  40  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  41  */
  42 int DIB_GetDIBWidthBytes( int width, int depth )
  43 {
  44     int words;
  45
  46     switch(depth)
  47     {
  48         case 1:  words = (width + 31) / 32; break;
  49         case 4:  words = (width + 7) / 8; break;
  50         case 8:  words = (width + 3) / 4; break;
  51         case 15:
  52         case 16: words = (width + 1) / 2; break;
  53         case 24: words = (width * 3 + 3)/4; break;
  54
  55         default:
  56             WARN("(%d): Unsupported depth\n", depth );
  57         /* fall through */
  58         case 32:
  59                 words = width;
  60     }
  61     return 4 * words;
  62 }
  63
  64 /***********************************************************************
  65  *           DIB_GetDIBImageBytes
  66  *
  67  * Return the number of bytes used to hold the image in a DIB bitmap.
  68  */
  69 int DIB_GetDIBImageBytes( int width, int height, int depth )
  70 {
  71     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  72 }
  73
  74
  75 /***********************************************************************
  76  *           DIB_BitmapInfoSize
  77  *
  78  * Return the size of the bitmap info structure including color table.
  79  */
  80 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  81 {
  82     int colors;
  83
  84     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  85     {
  86         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  87         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  88         return sizeof(BITMAPCOREHEADER) + colors *
  89              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  90     }
  91     else  /* assume BITMAPINFOHEADER */
  92     {
  93         colors = info->bmiHeader.biClrUsed;
  94         if (!colors && (info->bmiHeader.biBitCount <= 8))
  95             colors = 1 << info->bmiHeader.biBitCount;
  96         return sizeof(BITMAPINFOHEADER) + colors *
  97                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  98     }
  99 }
 100
 101
 102 /***********************************************************************
 103  *           DIB_GetBitmapInfo
 104  *
 105  * Get the info from a bitmap header.
 106  * Return 1 for INFOHEADER, 0 for COREHEADER,
 107  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
 108  */
 109 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
 110                               int *height, WORD *bpp, WORD *compr )
 111 {
 112     if (header->biSize == sizeof(BITMAPINFOHEADER))
 113     {
 114         *width  = header->biWidth;
 115         *height = header->biHeight;
 116         *bpp    = header->biBitCount;
 117         *compr  = header->biCompression;
 118         return 1;
 119     }
 120     if (header->biSize == sizeof(BITMAPCOREHEADER))
 121     {
 122         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 123         *width  = core->bcWidth;
 124         *height = core->bcHeight;
 125         *bpp    = core->bcBitCount;
 126         *compr  = 0;
 127         return 0;
 128     }
 129     if (header->biSize == sizeof(BITMAPV4HEADER))
 130     {
 131         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 132         *width  = v4hdr->bV4Width;
 133         *height = v4hdr->bV4Height;
 134         *bpp    = v4hdr->bV4BitCount;
 135         *compr  = v4hdr->bV4V4Compression;
 136         return 4;
 137     }
 138     if (header->biSize == sizeof(BITMAPV5HEADER))
 139     {
 140         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 141         *width  = v5hdr->bV5Width;
 142         *height = v5hdr->bV5Height;
 143         *bpp    = v5hdr->bV5BitCount;
 144         *compr  = v5hdr->bV5Compression;
 145         return 5;
 146     }
 147     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 148     return -1;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           StretchDIBits   (GDI32.@)
 154  */
 155 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 156                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 157                        INT heightSrc, const void *bits,
 158                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 159 {
 160     DC *dc;
 161
 162     if (!bits || !info)
 163         return 0;
 164
 165     dc = DC_GetDCUpdate( hdc );
 166     if(!dc) return FALSE;
 167
 168     if(dc->funcs->pStretchDIBits)
 169     {
 170         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 171                                               heightDst, xSrc, ySrc, widthSrc,
 172                                               heightSrc, bits, info, wUsage, dwRop);
 173         GDI_ReleaseObj( hdc );
 174     }
 175     else /* use StretchBlt */
 176     {
 177         HBITMAP hBitmap, hOldBitmap;
 178         HDC hdcMem;
 179
 180         GDI_ReleaseObj( hdc );
 181         hdcMem = CreateCompatibleDC( hdc );
 182         if (info->bmiHeader.biCompression == BI_RLE4 ||
 183             info->bmiHeader.biCompression == BI_RLE8) {
 184
 185            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 186             * contain all the rectangle described in bmiHeader, but only part of it.
 187             * This mean that those undescribed pixels must be left untouched.
 188             * So, we first copy on a memory bitmap the current content of the
 189             * destination rectangle, blit the DIB bits on top of it - hence leaving
 190             * the gaps untouched -, and blitting the rectangle back.
 191             * This insure that gaps are untouched on the destination rectangle
 192             * Not doing so leads to trashed images (the gaps contain what was on the
 193             * memory bitmap => generally black or garbage)
 194             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 195             * another speed vs correctness issue. Anyway, if speed is needed, then the
 196             * pStretchDIBits function shall be implemented.
 197             * ericP (2000/09/09)
 198             */
 199            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 200                                             info->bmiHeader.biHeight);
 201            hOldBitmap = SelectObject( hdcMem, hBitmap );
 202
 203            /* copy existing bitmap from destination dc */
 204            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 205                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 206                        dwRop );
 207            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 208                      info, DIB_RGB_COLORS);
 209
 210         } else {
 211            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 212                                      bits, info, wUsage );
 213            hOldBitmap = SelectObject( hdcMem, hBitmap );
 214         }
 215
 216         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 217            left (negative biHeight) */
 218         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 219                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 220                     widthSrc, heightSrc, dwRop );
 221         SelectObject( hdcMem, hOldBitmap );
 222         DeleteDC( hdcMem );
 223         DeleteObject( hBitmap );
 224     }
 225     return heightSrc;
 226 }
 227
 228
 229 /******************************************************************************
 230  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 231  *
 232  * PARAMS
 233  *    hdc       [I] Handle to device context
 234  *    hbitmap   [I] Handle to bitmap
 235  *    startscan [I] Starting scan line
 236  *    lines     [I] Number of scan lines
 237  *    bits      [I] Array of bitmap bits
 238  *    info      [I] Address of structure with data
 239  *    coloruse  [I] Type of color indexes to use
 240  *
 241  * RETURNS
 242  *    Success: Number of scan lines copied
 243  *    Failure: 0
 244  */
 245 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 246                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 247                       UINT coloruse )
 248 {
 249     DC *dc;
 250     BITMAPOBJ *bitmap;
 251     INT result = 0;
 252
 253     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 254
 255     if (!(dc = DC_GetDCUpdate( hdc )))
 256     {
 257         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 258         GDI_ReleaseObj( hbitmap );
 259         return 0;
 260     }
 261
 262     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 263
 264     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 265         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 266                                             bits, info, coloruse );
 267     else
 268         result = lines;
 269
 270  done:
 271     GDI_ReleaseObj( hdc );
 272     GDI_ReleaseObj( hbitmap );
 273     return result;
 274 }
 275
 276
 277 /***********************************************************************
 278  *           SetDIBitsToDevice   (GDI32.@)
 279  */
 280 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 281                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 282                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 283                            UINT coloruse )
 284 {
 285     INT ret;
 286     DC *dc;
 287
 288     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 289
 290     if(dc->funcs->pSetDIBitsToDevice)
 291         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 292                                              ySrc, startscan, lines, bits,
 293                                              info, coloruse );
 294     else {
 295         FIXME("unimplemented on hdc %p\n", hdc);
 296         ret = 0;
 297     }
 298
 299     GDI_ReleaseObj( hdc );
 300     return ret;
 301 }
 302
 303 /***********************************************************************
 304  *           SetDIBColorTable    (GDI32.@)
 305  */
 306 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 307 {
 308     DC * dc;
 309     UINT result = 0;
 310
 311     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 312
 313     if (dc->funcs->pSetDIBColorTable)
 314         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 315
 316     GDI_ReleaseObj( hdc );
 317     return result;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           GetDIBColorTable    (GDI32.@)
 323  */
 324 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 325 {
 326     DC * dc;
 327     UINT result = 0;
 328
 329     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 330
 331     if (dc->funcs->pGetDIBColorTable)
 332         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 333
 334     GDI_ReleaseObj( hdc );
 335     return result;
 336 }
 337
 338 /* FIXME the following two structs should be combined with __sysPalTemplate in
 339    objects/color.c - this should happen after de-X11-ing both of these
 340    files.
 341    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 342    and blue - sigh */
 343
 344 static RGBQUAD EGAColors[16] = {
 345 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 346     { 0x00, 0x00, 0x00, 0x00 },
 347     { 0x00, 0x00, 0x80, 0x00 },
 348     { 0x00, 0x80, 0x00, 0x00 },
 349     { 0x00, 0x80, 0x80, 0x00 },
 350     { 0x80, 0x00, 0x00, 0x00 },
 351     { 0x80, 0x00, 0x80, 0x00 },
 352     { 0x80, 0x80, 0x00, 0x00 },
 353     { 0x80, 0x80, 0x80, 0x00 },
 354     { 0xc0, 0xc0, 0xc0, 0x00 },
 355     { 0x00, 0x00, 0xff, 0x00 },
 356     { 0x00, 0xff, 0x00, 0x00 },
 357     { 0x00, 0xff, 0xff, 0x00 },
 358     { 0xff, 0x00, 0x00, 0x00 },
 359     { 0xff, 0x00, 0xff, 0x00 },
 360     { 0xff, 0xff, 0x00, 0x00 },
 361     { 0xff, 0xff, 0xff, 0x00 }
 362 };
 363
 364
 365 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 366 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 367     { 0x00, 0x00, 0x00, 0x00 },
 368     { 0x00, 0x00, 0x80, 0x00 },
 369     { 0x00, 0x80, 0x00, 0x00 },
 370     { 0x00, 0x80, 0x80, 0x00 },
 371     { 0x80, 0x00, 0x00, 0x00 },
 372     { 0x80, 0x00, 0x80, 0x00 },
 373     { 0x80, 0x80, 0x00, 0x00 },
 374     { 0xc0, 0xc0, 0xc0, 0x00 },
 375     { 0xc0, 0xdc, 0xc0, 0x00 },
 376     { 0xf0, 0xca, 0xa6, 0x00 },
 377     { 0xf0, 0xfb, 0xff, 0x00 },
 378     { 0xa4, 0xa0, 0xa0, 0x00 },
 379     { 0x80, 0x80, 0x80, 0x00 },
 380     { 0x00, 0x00, 0xf0, 0x00 },
 381     { 0x00, 0xff, 0x00, 0x00 },
 382     { 0x00, 0xff, 0xff, 0x00 },
 383     { 0xff, 0x00, 0x00, 0x00 },
 384     { 0xff, 0x00, 0xff, 0x00 },
 385     { 0xff, 0xff, 0x00, 0x00 },
 386     { 0xff, 0xff, 0xff, 0x00 }
 387 };
 388
 389
 390 /******************************************************************************
 391  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 392  *
 393  * RETURNS
 394  *    Success: Number of scan lines copied from bitmap
 395  *    Failure: 0
 396  *
 397  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 398  */
 399 INT WINAPI GetDIBits(
 400     HDC hdc,         /* [in]  Handle to device context */
 401     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 402     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 403     UINT lines,      /* [in]  Number of scan lines to copy */
 404     LPVOID bits,       /* [out] Address of array for bitmap bits */
 405     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 406     UINT coloruse)   /* [in]  RGB or palette index */
 407 {
 408     DC * dc;
 409     BITMAPOBJ * bmp;
 410     PALETTEENTRY * palEntry;
 411     PALETTEOBJ * palette;
 412     int i;
 413
 414     if (!info) return 0;
 415     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 416     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 417     {
 418         GDI_ReleaseObj( hdc );
 419         return 0;
 420     }
 421     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 422     {
 423         GDI_ReleaseObj( hdc );
 424         GDI_ReleaseObj( hbitmap );
 425         return 0;
 426     }
 427
 428     /* Transfer color info */
 429
 430     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 431
 432         info->bmiHeader.biClrUsed = 0;
 433
 434         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 435             palEntry = palette->logpalette.palPalEntry;
 436             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 437                 if (coloruse == DIB_RGB_COLORS) {
 438                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 439                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 440                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 441                     info->bmiColors[i].rgbReserved = 0;
 442                 }
 443                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 444             }
 445         } else {
 446             switch (info->bmiHeader.biBitCount) {
 447             case 1:
 448                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 449                   info->bmiColors[0].rgbBlue = 0;
 450                 info->bmiColors[0].rgbReserved = 0;
 451                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 452                   info->bmiColors[1].rgbBlue = 0xff;
 453                 info->bmiColors[1].rgbReserved = 0;
 454                 break;
 455
 456             case 4:
 457                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 458                 break;
 459
 460             case 8:
 461                 {
 462                 INT r, g, b;
 463                 RGBQUAD *color;
 464
 465                 memcpy(info->bmiColors, DefLogPalette,
 466                        10 * sizeof(RGBQUAD));
 467                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 468                        10 * sizeof(RGBQUAD));
 469                 color = info->bmiColors + 10;
 470                 for(r = 0; r <= 5; r++) /* FIXME */
 471                     for(g = 0; g <= 5; g++)
 472                         for(b = 0; b <= 5; b++) {
 473                             color->rgbRed =   (r * 0xff) / 5;
 474                             color->rgbGreen = (g * 0xff) / 5;
 475                             color->rgbBlue =  (b * 0xff) / 5;
 476                             color->rgbReserved = 0;
 477                             color++;
 478                         }
 479                 }
 480             }
 481         }
 482     }
 483
 484     GDI_ReleaseObj( dc->hPalette );
 485
 486     if (bits && lines)
 487     {
 488         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 489         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 490         {
 491             /*FIXME: Only RGB dibs supported for now */
 492             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 493             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 494             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 495             unsigned int x, y;
 496
 497             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 498             {
 499                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 500                 dstwidthb = -dstwidthb;
 501             }
 502
 503             switch( info->bmiHeader.biBitCount ) {
 504
 505             case 15:
 506             case 16: /* 16 bpp dstDIB */
 507                 {
 508                     LPWORD dstbits = (LPWORD)dbits;
 509                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 510
 511                     /* FIXME: BI_BITFIELDS not supported yet */
 512
 513                     switch(bmp->dib->dsBm.bmBitsPixel) {
 514
 515                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 516                         {
 517                             /* FIXME: BI_BITFIELDS not supported yet */
 518                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 519                                 memcpy(dbits, sbits, srcwidthb);
 520                         }
 521                         break;
 522
 523                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 524                         {
 525                             LPBYTE srcbits = sbits;
 526
 527                             for( y = 0; y < lines; y++) {
 528                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 529                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 530                                                  (((WORD)srcbits[1] << 2) & gmask) |
 531                                                  (((WORD)srcbits[2] << 7) & rmask);
 532
 533                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 534                                 srcbits = (sbits += srcwidthb);
 535                             }
 536                         }
 537                         break;
 538
 539                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 540                         {
 541                             LPDWORD srcbits = (LPDWORD)sbits;
 542                             DWORD val;
 543
 544                             for( y = 0; y < lines; y++) {
 545                                 for( x = 0; x < srcwidth; x++ ) {
 546                                     val = *srcbits++;
 547                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 548                                                        ((val >> 9) & rmask));
 549                                 }
 550                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 551                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 552                             }
 553                         }
 554                         break;
 555
 556                     default: /* ? bit bmp -> 16 bit DIB */
 557                         FIXME("15/16 bit DIB %d bit bitmap\n",
 558                         bmp->bitmap.bmBitsPixel);
 559                         break;
 560                     }
 561                 }
 562                 break;
 563
 564             case 24: /* 24 bpp dstDIB */
 565                 {
 566                     LPBYTE dstbits = dbits;
 567
 568                     switch(bmp->dib->dsBm.bmBitsPixel) {
 569
 570                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 571                         {
 572                             LPWORD srcbits = (LPWORD)sbits;
 573                             WORD val;
 574
 575                             /* FIXME: BI_BITFIELDS not supported yet */
 576                             for( y = 0; y < lines; y++) {
 577                                 for( x = 0; x < srcwidth; x++ ) {
 578                                     val = *srcbits++;
 579                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 580                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 581                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 582                                 }
 583                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 584                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 585                             }
 586                         }
 587                         break;
 588
 589                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 590                         {
 591                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 592                                 memcpy(dbits, sbits, srcwidthb);
 593                         }
 594                         break;
 595
 596                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 597                         {
 598                             LPBYTE srcbits = (LPBYTE)sbits;
 599
 600                             for( y = 0; y < lines; y++) {
 601                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 602                                     *dstbits++ = *srcbits++;
 603                                     *dstbits++ = *srcbits++;
 604                                     *dstbits++ = *srcbits++;
 605                                 }
 606                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 607                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 608                             }
 609                         }
 610                         break;
 611
 612                     default: /* ? bit bmp -> 24 bit DIB */
 613                         FIXME("24 bit DIB %d bit bitmap\n",
 614                               bmp->bitmap.bmBitsPixel);
 615                         break;
 616                     }
 617                 }
 618                 break;
 619
 620             case 32: /* 32 bpp dstDIB */
 621                 {
 622                     LPDWORD dstbits = (LPDWORD)dbits;
 623
 624                     /* FIXME: BI_BITFIELDS not supported yet */
 625
 626                     switch(bmp->dib->dsBm.bmBitsPixel) {
 627                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 628                         {
 629                             LPWORD srcbits = (LPWORD)sbits;
 630                             DWORD val;
 631
 632                             /* FIXME: BI_BITFIELDS not supported yet */
 633                             for( y = 0; y < lines; y++) {
 634                                 for( x = 0; x < srcwidth; x++ ) {
 635                                     val = (DWORD)*srcbits++;
 636                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 637                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 638                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 639                                 }
 640                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 641                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 642                             }
 643                         }
 644                         break;
 645
 646                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 647                         {
 648                             LPBYTE srcbits = sbits;
 649
 650                             for( y = 0; y < lines; y++) {
 651                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 652                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 653                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 654                                 srcbits=(sbits+=srcwidthb);
 655                             }
 656                         }
 657                         break;
 658
 659                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 660                         {
 661                             /* FIXME: BI_BITFIELDS not supported yet */
 662                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 663                                 memcpy(dbits, sbits, srcwidthb);
 664                         }
 665                         break;
 666
 667                     default: /* ? bit bmp -> 16 bit DIB */
 668                         FIXME("15/16 bit DIB %d bit bitmap\n",
 669                         bmp->bitmap.bmBitsPixel);
 670                         break;
 671                     }
 672                 }
 673                 break;
 674
 675             default: /* ? bit DIB */
 676                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 677                 break;
 678             }
 679         }
 680         /* Otherwise, get bits from the XImage */
 681         else
 682         {
 683             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 684             else
 685             {
 686                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 687                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 688                                                     lines, bits, info, coloruse );
 689                 else
 690                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 691             }
 692         }
 693     }
 694     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 695     {
 696         /* fill in struct members */
 697
 698         if( info->bmiHeader.biBitCount == 0)
 699         {
 700             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 701             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 702             info->bmiHeader.biPlanes = 1;
 703             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 704             info->bmiHeader.biSizeImage =
 705                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 706                                                    bmp->bitmap.bmHeight,
 707                                                    bmp->bitmap.bmBitsPixel );
 708             info->bmiHeader.biCompression = 0;
 709         }
 710         else
 711         {
 712             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 713                                                info->bmiHeader.biWidth,
 714                                                info->bmiHeader.biHeight,
 715                                                info->bmiHeader.biBitCount );
 716         }
 717     }
 718
 719     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 720           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 721           info->bmiHeader.biHeight);
 722
 723     GDI_ReleaseObj( hdc );
 724     GDI_ReleaseObj( hbitmap );
 725
 726     return lines;
 727 }
 728
 729
 730 /***********************************************************************
 731  *           CreateDIBitmap    (GDI32.@)
 732  */
 733 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 734                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 735                             UINT coloruse )
 736 {
 737     HBITMAP handle;
 738     BOOL fColor;
 739     DWORD width;
 740     int height;
 741     WORD bpp;
 742     WORD compr;
 743     DC *dc;
 744
 745     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 746     if (height < 0) height = -height;
 747
 748     /* Check if we should create a monochrome or color bitmap. */
 749     /* We create a monochrome bitmap only if it has exactly 2  */
 750     /* colors, which are black followed by white, nothing else.  */
 751     /* In all other cases, we create a color bitmap.           */
 752
 753     if (bpp != 1) fColor = TRUE;
 754     else if ((coloruse != DIB_RGB_COLORS) ||
 755              (init != CBM_INIT) || !data) fColor = FALSE;
 756     else
 757     {
 758         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 759         {
 760             RGBQUAD *rgb = data->bmiColors;
 761             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 762
 763             /* Check if the first color of the colormap is black */
 764             if ((col == RGB(0,0,0)))
 765             {
 766                 rgb++;
 767                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 768                 /* If the second color is white, create a monochrome bitmap */
 769                 fColor =  (col != RGB(0xff,0xff,0xff));
 770             }
 771             /* Note : If the first color of the colormap is white
 772                followed by black, we have to create a color bitmap.
 773                If we don't the white will be displayed in black later on!*/
 774             else fColor = TRUE;
 775         }
 776         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 777         {
 778             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 779             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 780             if ((col == RGB(0,0,0)))
 781             {
 782                 rgb++;
 783                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 784                 fColor = (col != RGB(0xff,0xff,0xff));
 785             }
 786             else fColor = TRUE;
 787         }
 788         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 789         { /* FIXME: correct ? */
 790             RGBQUAD *rgb = data->bmiColors;
 791             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 792
 793             /* Check if the first color of the colormap is black */
 794             if ((col == RGB(0,0,0)))
 795             {
 796                 rgb++;
 797                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 798                 /* If the second color is white, create a monochrome bitmap */
 799                 fColor =  (col != RGB(0xff,0xff,0xff));
 800             }
 801             /* Note : If the first color of the colormap is white
 802                followed by black, we have to create a color bitmap.
 803                If we don't the white will be displayed in black later on!*/
 804             else fColor = TRUE;
 805         }
 806         else
 807         {
 808             ERR("(%ld): wrong/unknown size for data\n",
 809                      data->bmiHeader.biSize );
 810             return 0;
 811         }
 812     }
 813
 814     /* Now create the bitmap */
 815
 816     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 817
 818     if (fColor)
 819         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 820                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 821     else handle = CreateBitmap( width, height, 1, 1, NULL );
 822
 823     if (handle)
 824     {
 825         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 826         else if (!BITMAP_SetOwnerDC( handle, dc ))
 827         {
 828             DeleteObject( handle );
 829             handle = 0;
 830         }
 831     }
 832
 833     GDI_ReleaseObj( hdc );
 834     return handle;
 835 }
 836
 837 /***********************************************************************
 838  *           CreateDIBSection    (GDI.489)
 839  */
 840 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 841                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 842 {
 843     LPVOID bits32;
 844     HBITMAP hbitmap;
 845
 846     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 847     if (hbitmap)
 848     {
 849         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 850         if (bmp && bmp->dib && bits32)
 851         {
 852             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 853             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 854             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 855             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 856                          bi->biSizeImage : width_bytes * height;
 857
 858             /* calculate number of sel's needed for size with 64K steps */
 859             WORD count = (size + 0xffff) / 0x10000;
 860             WORD sel = AllocSelectorArray16(count);
 861             int i;
 862
 863             for (i = 0; i < count; i++)
 864             {
 865                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 866                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 867                 size -= 0x10000;
 868             }
 869             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 870             if (bits16) *bits16 = bmp->segptr_bits;
 871         }
 872         if (bmp) GDI_ReleaseObj( hbitmap );
 873     }
 874     return HBITMAP_16(hbitmap);
 875 }
 876
 877 /***********************************************************************
 878  *           DIB_CreateDIBSection
 879  */
 880 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 881                              LPVOID *bits, HANDLE section,
 882                              DWORD offset, DWORD ovr_pitch)
 883 {
 884     HBITMAP hbitmap = 0;
 885     DC *dc;
 886     BOOL bDesktopDC = FALSE;
 887
 888     /* If the reference hdc is null, take the desktop dc */
 889     if (hdc == 0)
 890     {
 891         hdc = CreateCompatibleDC(0);
 892         bDesktopDC = TRUE;
 893     }
 894
 895     if ((dc = DC_GetDCPtr( hdc )))
 896     {
 897         hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 898         GDI_ReleaseObj(hdc);
 899     }
 900
 901     if (bDesktopDC)
 902       DeleteDC(hdc);
 903
 904     return hbitmap;
 905 }
 906
 907 /***********************************************************************
 908  *           CreateDIBSection    (GDI32.@)
 909  */
 910 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 911                                 LPVOID *bits, HANDLE section,
 912                                 DWORD offset)
 913 {
 914     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 915 }
 916
 917 /***********************************************************************
 918  *           DIB_CreateDIBFromBitmap
 919  *  Allocates a packed DIB and copies the bitmap data into it.
 920  */
 921 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 922 {
 923     BITMAPOBJ *pBmp = NULL;
 924     HGLOBAL hPackedDIB = 0;
 925     LPBYTE pPackedDIB = NULL;
 926     LPBITMAPINFOHEADER pbmiHeader = NULL;
 927     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 928                  OffsetBits = 0, nLinesCopied = 0;
 929
 930     /* Get a pointer to the BITMAPOBJ structure */
 931     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 932     if (!pBmp) return hPackedDIB;
 933
 934     /* Get the bitmap dimensions */
 935     width = pBmp->bitmap.bmWidth;
 936     height = pBmp->bitmap.bmHeight;
 937     depth = pBmp->bitmap.bmBitsPixel;
 938
 939     /*
 940      * A packed DIB contains a BITMAPINFO structure followed immediately by
 941      * an optional color palette and the pixel data.
 942      */
 943
 944     /* Calculate the size of the packed DIB */
 945     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 946     cPackedSize = sizeof(BITMAPINFOHEADER)
 947                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 948                   + cDataSize;
 949     /* Get the offset to the bits */
 950     OffsetBits = cPackedSize - cDataSize;
 951
 952     /* Allocate the packed DIB */
 953     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 954     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 955                              cPackedSize );
 956     if ( !hPackedDIB )
 957     {
 958         WARN("Could not allocate packed DIB!\n");
 959         goto END;
 960     }
 961
 962     /* A packed DIB starts with a BITMAPINFOHEADER */
 963     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 964     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 965
 966     /* Init the BITMAPINFOHEADER */
 967     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 968     pbmiHeader->biWidth = width;
 969     pbmiHeader->biHeight = height;
 970     pbmiHeader->biPlanes = 1;
 971     pbmiHeader->biBitCount = depth;
 972     pbmiHeader->biCompression = BI_RGB;
 973     pbmiHeader->biSizeImage = 0;
 974     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
 975     pbmiHeader->biClrUsed = 0;
 976     pbmiHeader->biClrImportant = 0;
 977
 978     /* Retrieve the DIB bits from the bitmap and fill in the
 979      * DIB color table if present */
 980
 981     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
 982                              hBmp,                      /* Handle to bitmap */
 983                              0,                         /* First scan line to set in dest bitmap */
 984                              height,                    /* Number of scan lines to copy */
 985                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
 986                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
 987                              0);                        /* RGB or palette index */
 988     GlobalUnlock(hPackedDIB);
 989
 990     /* Cleanup if GetDIBits failed */
 991     if (nLinesCopied != height)
 992     {
 993         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
 994         GlobalFree(hPackedDIB);
 995         hPackedDIB = 0;
 996     }
 997
 998 END:
 999     GDI_ReleaseObj( hBmp );
1000     return hPackedDIB;
1001 }