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