objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  */
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "winbase.h"
  12 #include "bitmap.h"
  13 #include "selectors.h"
  14 #include "gdi.h"
  15 #include "debugtools.h"
  16 #include "palette.h"
  17
  18 DEFAULT_DEBUG_CHANNEL(bitmap);
  19
  20 /***********************************************************************
  21  *           DIB_GetDIBWidthBytes
  22  *
  23  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  24  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  25  */
  26 int DIB_GetDIBWidthBytes( int width, int depth )
  27 {
  28     int words;
  29
  30     switch(depth)
  31     {
  32         case 1:  words = (width + 31) / 32; break;
  33         case 4:  words = (width + 7) / 8; break;
  34         case 8:  words = (width + 3) / 4; break;
  35         case 15:
  36         case 16: words = (width + 1) / 2; break;
  37         case 24: words = (width * 3 + 3)/4; break;
  38
  39         default:
  40             WARN("(%d): Unsupported depth\n", depth );
  41         /* fall through */
  42         case 32:
  43                 words = width;
  44     }
  45     return 4 * words;
  46 }
  47
  48 /***********************************************************************
  49  *           DIB_GetDIBImageBytes
  50  *
  51  * Return the number of bytes used to hold the image in a DIB bitmap.
  52  */
  53 int DIB_GetDIBImageBytes( int width, int height, int depth )
  54 {
  55     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  56 }
  57
  58
  59 /***********************************************************************
  60  *           DIB_BitmapInfoSize
  61  *
  62  * Return the size of the bitmap info structure including color table.
  63  */
  64 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  65 {
  66     int colors;
  67
  68     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  69     {
  70         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  71         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  72         return sizeof(BITMAPCOREHEADER) + colors *
  73              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  74     }
  75     else  /* assume BITMAPINFOHEADER */
  76     {
  77         colors = info->bmiHeader.biClrUsed;
  78         if (!colors && (info->bmiHeader.biBitCount <= 8))
  79             colors = 1 << info->bmiHeader.biBitCount;
  80         return sizeof(BITMAPINFOHEADER) + colors *
  81                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  82     }
  83 }
  84
  85
  86 /***********************************************************************
  87  *           DIB_GetBitmapInfo
  88  *
  89  * Get the info from a bitmap header.
  90  * Return 1 for INFOHEADER, 0 for COREHEADER,
  91  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
  92  */
  93 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
  94                               int *height, WORD *bpp, WORD *compr )
  95 {
  96     if (header->biSize == sizeof(BITMAPINFOHEADER))
  97     {
  98         *width  = header->biWidth;
  99         *height = header->biHeight;
 100         *bpp    = header->biBitCount;
 101         *compr  = header->biCompression;
 102         return 1;
 103     }
 104     if (header->biSize == sizeof(BITMAPCOREHEADER))
 105     {
 106         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 107         *width  = core->bcWidth;
 108         *height = core->bcHeight;
 109         *bpp    = core->bcBitCount;
 110         *compr  = 0;
 111         return 0;
 112     }
 113     if (header->biSize == sizeof(BITMAPV4HEADER))
 114     {
 115         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 116         *width  = v4hdr->bV4Width;
 117         *height = v4hdr->bV4Height;
 118         *bpp    = v4hdr->bV4BitCount;
 119         *compr  = v4hdr->bV4Compression;
 120         return 4;
 121     }
 122     if (header->biSize == sizeof(BITMAPV5HEADER))
 123     {
 124         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 125         *width  = v5hdr->bV5Width;
 126         *height = v5hdr->bV5Height;
 127         *bpp    = v5hdr->bV5BitCount;
 128         *compr  = v5hdr->bV5Compression;
 129         return 5;
 130     }
 131     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 132     return -1;
 133 }
 134
 135
 136 /***********************************************************************
 137  *           StretchDIBits   (GDI.439)
 138  */
 139 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
 140                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
 141                        INT16 heightSrc, const VOID *bits,
 142                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
 143 {
 144     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
 145                                    xSrc, ySrc, widthSrc, heightSrc, bits,
 146                                    info, wUsage, dwRop );
 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 = DC_GetDCUpdate( hdc );
 159     if(!dc) return FALSE;
 160
 161     if(dc->funcs->pStretchDIBits)
 162     {
 163         heightSrc = dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
 164                                               heightDst, xSrc, ySrc, widthSrc,
 165                                               heightSrc, bits, info, wUsage, dwRop);
 166         GDI_ReleaseObj( hdc );
 167     }
 168     else /* use StretchBlt */
 169     {
 170         HBITMAP hBitmap, hOldBitmap;
 171         HDC hdcMem;
 172
 173         GDI_ReleaseObj( hdc );
 174         hdcMem = CreateCompatibleDC( hdc );
 175         if (info->bmiHeader.biCompression == BI_RLE4 ||
 176             info->bmiHeader.biCompression == BI_RLE8) {
 177
 178            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 179             * contain all the rectangle described in bmiHeader, but only part of it.
 180             * This mean that those undescribed pixels must be left untouched.
 181             * So, we first copy on a memory bitmap the current content of the
 182             * destination rectangle, blit the DIB bits on top of it - hence leaving
 183             * the gaps untouched -, and blitting the rectangle back.
 184             * This insure that gaps are untouched on the destination rectangle
 185             * Not doing so leads to trashed images (the gaps contain what was on the
 186             * memory bitmap => generally black or garbage)
 187             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 188             * another speed vs correctness issue. Anyway, if speed is needed, then the
 189             * pStretchDIBits function shall be implemented.
 190             * ericP (2000/09/09)
 191             */
 192            hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 193                                             info->bmiHeader.biHeight);
 194            hOldBitmap = SelectObject( hdcMem, hBitmap );
 195
 196            /* copy existing bitmap from destination dc */
 197            StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 198                        widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 199                        dwRop );
 200            SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 201                      info, DIB_RGB_COLORS);
 202
 203         } else {
 204            hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
 205                                      bits, info, wUsage );
 206            hOldBitmap = SelectObject( hdcMem, hBitmap );
 207         }
 208
 209         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 210            left (negative biHeight) */
 211         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 212                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 213                     widthSrc, heightSrc, dwRop );
 214         SelectObject( hdcMem, hOldBitmap );
 215         DeleteDC( hdcMem );
 216         DeleteObject( hBitmap );
 217     }
 218     return heightSrc;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           SetDIBits    (GDI.440)
 224  */
 225 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 226                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 227                           UINT16 coloruse )
 228 {
 229     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 230 }
 231
 232
 233 /******************************************************************************
 234  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 235  *
 236  * PARAMS
 237  *    hdc       [I] Handle to device context
 238  *    hbitmap   [I] Handle to bitmap
 239  *    startscan [I] Starting scan line
 240  *    lines     [I] Number of scan lines
 241  *    bits      [I] Array of bitmap bits
 242  *    info      [I] Address of structure with data
 243  *    coloruse  [I] Type of color indexes to use
 244  *
 245  * RETURNS
 246  *    Success: Number of scan lines copied
 247  *    Failure: 0
 248  */
 249 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 250                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 251                       UINT coloruse )
 252 {
 253     DC *dc;
 254     BITMAPOBJ *bitmap;
 255     INT result;
 256
 257     /* Check parameters */
 258     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 259
 260     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 261     {
 262         GDI_ReleaseObj( hdc );
 263         return 0;
 264     }
 265
 266     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
 267                                        lines, bits, info,
 268                                        coloruse, hbitmap);
 269
 270     GDI_ReleaseObj( hbitmap );
 271     GDI_ReleaseObj( hdc );
 272
 273     return result;
 274 }
 275
 276
 277 /***********************************************************************
 278  *           SetDIBitsToDevice    (GDI.443)
 279  */
 280 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
 281                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
 282                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
 283                            UINT16 coloruse )
 284 {
 285     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
 286                                 startscan, lines, bits, info, coloruse );
 287 }
 288
 289
 290 /***********************************************************************
 291  *           SetDIBitsToDevice   (GDI32.@)
 292  */
 293 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 294                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 295                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 296                            UINT coloruse )
 297 {
 298     INT ret;
 299     DC *dc;
 300
 301     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 302
 303     if(dc->funcs->pSetDIBitsToDevice)
 304         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
 305                                              ySrc, startscan, lines, bits,
 306                                              info, coloruse );
 307     else {
 308         FIXME("unimplemented on hdc %08x\n", hdc);
 309         ret = 0;
 310     }
 311
 312     GDI_ReleaseObj( hdc );
 313     return ret;
 314 }
 315
 316 /***********************************************************************
 317  *           SetDIBColorTable    (GDI.602)
 318  */
 319 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 320                                   RGBQUAD *colors )
 321 {
 322     return SetDIBColorTable( hdc, startpos, entries, colors );
 323 }
 324
 325 /***********************************************************************
 326  *           SetDIBColorTable    (GDI32.@)
 327  */
 328 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 329                                   RGBQUAD *colors )
 330 {
 331     DC * dc;
 332     BITMAPOBJ * bmp;
 333     UINT result;
 334
 335     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 336
 337     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 338     {
 339         GDI_ReleaseObj( hdc );
 340         return 0;
 341     }
 342
 343     result = BITMAP_Driver->pSetDIBColorTable(bmp, dc, startpos, entries, colors);
 344
 345     GDI_ReleaseObj( dc->hBitmap );
 346     GDI_ReleaseObj( hdc );
 347     return result;
 348 }
 349
 350 /***********************************************************************
 351  *           GetDIBColorTable    (GDI.603)
 352  */
 353 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
 354                                   RGBQUAD *colors )
 355 {
 356     return GetDIBColorTable( hdc, startpos, entries, colors );
 357 }
 358
 359 /***********************************************************************
 360  *           GetDIBColorTable    (GDI32.@)
 361  */
 362 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
 363                                   RGBQUAD *colors )
 364 {
 365     DC * dc;
 366     BITMAPOBJ * bmp;
 367     UINT result;
 368
 369     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 370
 371     if (!(bmp = (BITMAPOBJ*)GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC )))
 372     {
 373         GDI_ReleaseObj( hdc );
 374         return 0;
 375     }
 376
 377     result = BITMAP_Driver->pGetDIBColorTable(bmp, dc, startpos, entries, colors);
 378
 379     GDI_ReleaseObj( dc->hBitmap );
 380     GDI_ReleaseObj( hdc );
 381     return result;
 382 }
 383
 384 /* FIXME the following two structs should be combined with __sysPalTemplate in
 385    objects/color.c - this should happen after de-X11-ing both of these
 386    files.
 387    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 388    and blue - sigh */
 389
 390 static RGBQUAD EGAColors[16] = {
 391 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 392     { 0x00, 0x00, 0x00, 0x00 },
 393     { 0x00, 0x00, 0x80, 0x00 },
 394     { 0x00, 0x80, 0x00, 0x00 },
 395     { 0x00, 0x80, 0x80, 0x00 },
 396     { 0x80, 0x00, 0x00, 0x00 },
 397     { 0x80, 0x00, 0x80, 0x00 },
 398     { 0x80, 0x80, 0x00, 0x00 },
 399     { 0x80, 0x80, 0x80, 0x00 },
 400     { 0xc0, 0xc0, 0xc0, 0x00 },
 401     { 0x00, 0x00, 0xff, 0x00 },
 402     { 0x00, 0xff, 0x00, 0x00 },
 403     { 0x00, 0xff, 0xff, 0x00 },
 404     { 0xff, 0x00, 0x00, 0x00 },
 405     { 0xff, 0x00, 0xff, 0x00 },
 406     { 0xff, 0xff, 0x00, 0x00 },
 407     { 0xff, 0xff, 0xff, 0x00 }
 408 };
 409
 410
 411 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 412 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 413     { 0x00, 0x00, 0x00, 0x00 },
 414     { 0x00, 0x00, 0x80, 0x00 },
 415     { 0x00, 0x80, 0x00, 0x00 },
 416     { 0x00, 0x80, 0x80, 0x00 },
 417     { 0x80, 0x00, 0x00, 0x00 },
 418     { 0x80, 0x00, 0x80, 0x00 },
 419     { 0x80, 0x80, 0x00, 0x00 },
 420     { 0xc0, 0xc0, 0xc0, 0x00 },
 421     { 0xc0, 0xdc, 0xc0, 0x00 },
 422     { 0xf0, 0xca, 0xa6, 0x00 },
 423     { 0xf0, 0xfb, 0xff, 0x00 },
 424     { 0xa4, 0xa0, 0xa0, 0x00 },
 425     { 0x80, 0x80, 0x80, 0x00 },
 426     { 0x00, 0x00, 0xf0, 0x00 },
 427     { 0x00, 0xff, 0x00, 0x00 },
 428     { 0x00, 0xff, 0xff, 0x00 },
 429     { 0xff, 0x00, 0x00, 0x00 },
 430     { 0xff, 0x00, 0xff, 0x00 },
 431     { 0xff, 0xff, 0x00, 0x00 },
 432     { 0xff, 0xff, 0xff, 0x00 }
 433 };
 434
 435 /***********************************************************************
 436  *           GetDIBits    (GDI.441)
 437  */
 438 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
 439                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
 440                           UINT16 coloruse )
 441 {
 442     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 443 }
 444
 445
 446 /******************************************************************************
 447  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 448  *
 449  * RETURNS
 450  *    Success: Number of scan lines copied from bitmap
 451  *    Failure: 0
 452  *
 453  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 454  */
 455 INT WINAPI GetDIBits(
 456     HDC hdc,         /* [in]  Handle to device context */
 457     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 458     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 459     UINT lines,      /* [in]  Number of scan lines to copy */
 460     LPVOID bits,       /* [out] Address of array for bitmap bits */
 461     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 462     UINT coloruse)   /* [in]  RGB or palette index */
 463 {
 464     DC * dc;
 465     BITMAPOBJ * bmp;
 466     PALETTEENTRY * palEntry;
 467     PALETTEOBJ * palette;
 468     int i;
 469
 470     if (!info) return 0;
 471     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 472     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 473     {
 474         GDI_ReleaseObj( hdc );
 475         return 0;
 476     }
 477     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC )))
 478     {
 479         GDI_ReleaseObj( hdc );
 480         GDI_ReleaseObj( hbitmap );
 481         return 0;
 482     }
 483
 484     /* Transfer color info */
 485
 486     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 487
 488         info->bmiHeader.biClrUsed = 0;
 489
 490         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 491             palEntry = palette->logpalette.palPalEntry;
 492             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 493                 if (coloruse == DIB_RGB_COLORS) {
 494                     info->bmiColors[i].rgbRed      = palEntry->peRed;
 495                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 496                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 497                     info->bmiColors[i].rgbReserved = 0;
 498                 }
 499                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
 500             }
 501         } else {
 502             switch (info->bmiHeader.biBitCount) {
 503             case 1:
 504                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 505                   info->bmiColors[0].rgbBlue = 0;
 506                 info->bmiColors[0].rgbReserved = 0;
 507                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 508                   info->bmiColors[1].rgbBlue = 0xff;
 509                 info->bmiColors[1].rgbReserved = 0;
 510                 break;
 511
 512             case 4:
 513                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 514                 break;
 515
 516             case 8:
 517                 {
 518                 INT r, g, b;
 519                 RGBQUAD *color;
 520
 521                 memcpy(info->bmiColors, DefLogPalette,
 522                        10 * sizeof(RGBQUAD));
 523                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
 524                        10 * sizeof(RGBQUAD));
 525                 color = info->bmiColors + 10;
 526                 for(r = 0; r <= 5; r++) /* FIXME */
 527                     for(g = 0; g <= 5; g++)
 528                         for(b = 0; b <= 5; b++) {
 529                             color->rgbRed =   (r * 0xff) / 5;
 530                             color->rgbGreen = (g * 0xff) / 5;
 531                             color->rgbBlue =  (b * 0xff) / 5;
 532                             color->rgbReserved = 0;
 533                             color++;
 534                         }
 535                 }
 536             }
 537         }
 538     }
 539
 540     GDI_ReleaseObj( dc->hPalette );
 541
 542     if (bits && lines)
 543     {
 544         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 545         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 546         {
 547             /*FIXME: Only RGB dibs supported for now */
 548             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 549             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 550             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 551             unsigned int x, y;
 552
 553             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 554             {
 555                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 556                 dstwidthb = -dstwidthb;
 557             }
 558
 559             switch( info->bmiHeader.biBitCount ) {
 560
 561             case 15:
 562             case 16: /* 16 bpp dstDIB */
 563                 {
 564                     LPWORD dstbits = (LPWORD)dbits;
 565                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 566
 567                     /* FIXME: BI_BITFIELDS not supported yet */
 568
 569                     switch(bmp->dib->dsBm.bmBitsPixel) {
 570
 571                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 572                         {
 573                             /* FIXME: BI_BITFIELDS not supported yet */
 574                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 575                                 memcpy(dbits, sbits, srcwidthb);
 576                         }
 577                         break;
 578
 579                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 580                         {
 581                             LPBYTE srcbits = sbits;
 582
 583                             for( y = 0; y < lines; y++) {
 584                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 585                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 586                                                  (((WORD)srcbits[1] << 2) & gmask) |
 587                                                  (((WORD)srcbits[2] << 7) & rmask);
 588
 589                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 590                                 srcbits = (sbits += srcwidthb);
 591                             }
 592                         }
 593                         break;
 594
 595                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 596                         {
 597                             LPDWORD srcbits = (LPDWORD)sbits;
 598                             DWORD val;
 599
 600                             for( y = 0; y < lines; y++) {
 601                                 for( x = 0; x < srcwidth; x++ ) {
 602                                     val = *srcbits++;
 603                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 604                                                        ((val >> 9) & rmask));
 605                                 }
 606                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 607                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 608                             }
 609                         }
 610                         break;
 611
 612                     default: /* ? bit bmp -> 16 bit DIB */
 613                         FIXME("15/16 bit DIB %d bit bitmap\n",
 614                         bmp->bitmap.bmBitsPixel);
 615                         break;
 616                     }
 617                 }
 618                 break;
 619
 620             case 24: /* 24 bpp dstDIB */
 621                 {
 622                     LPBYTE dstbits = dbits;
 623
 624                     switch(bmp->dib->dsBm.bmBitsPixel) {
 625
 626                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 627                         {
 628                             LPWORD srcbits = (LPWORD)sbits;
 629                             WORD val;
 630
 631                             /* FIXME: BI_BITFIELDS not supported yet */
 632                             for( y = 0; y < lines; y++) {
 633                                 for( x = 0; x < srcwidth; x++ ) {
 634                                     val = *srcbits++;
 635                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 636                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 637                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 638                                 }
 639                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 640                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 641                             }
 642                         }
 643                         break;
 644
 645                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 646                         {
 647                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 648                                 memcpy(dbits, sbits, srcwidthb);
 649                         }
 650                         break;
 651
 652                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 653                         {
 654                             LPBYTE srcbits = (LPBYTE)sbits;
 655
 656                             for( y = 0; y < lines; y++) {
 657                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 658                                     *dstbits++ = *srcbits++;
 659                                     *dstbits++ = *srcbits++;
 660                                     *dstbits++ = *srcbits++;
 661                                 }
 662                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 663                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 664                             }
 665                         }
 666                         break;
 667
 668                     default: /* ? bit bmp -> 24 bit DIB */
 669                         FIXME("24 bit DIB %d bit bitmap\n",
 670                               bmp->bitmap.bmBitsPixel);
 671                         break;
 672                     }
 673                 }
 674                 break;
 675
 676             case 32: /* 32 bpp dstDIB */
 677                 {
 678                     LPDWORD dstbits = (LPDWORD)dbits;
 679
 680                     /* FIXME: BI_BITFIELDS not supported yet */
 681
 682                     switch(bmp->dib->dsBm.bmBitsPixel) {
 683                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 684                         {
 685                             LPWORD srcbits = (LPWORD)sbits;
 686                             DWORD val;
 687
 688                             /* FIXME: BI_BITFIELDS not supported yet */
 689                             for( y = 0; y < lines; y++) {
 690                                 for( x = 0; x < srcwidth; x++ ) {
 691                                     val = (DWORD)*srcbits++;
 692                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 693                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 694                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 695                                 }
 696                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 697                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 698                             }
 699                         }
 700                         break;
 701
 702                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 703                         {
 704                             LPBYTE srcbits = sbits;
 705
 706                             for( y = 0; y < lines; y++) {
 707                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 708                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 709                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 710                                 srcbits=(sbits+=srcwidthb);
 711                             }
 712                         }
 713                         break;
 714
 715                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 716                         {
 717                             /* FIXME: BI_BITFIELDS not supported yet */
 718                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 719                                 memcpy(dbits, sbits, srcwidthb);
 720                         }
 721                         break;
 722
 723                     default: /* ? bit bmp -> 16 bit DIB */
 724                         FIXME("15/16 bit DIB %d bit bitmap\n",
 725                         bmp->bitmap.bmBitsPixel);
 726                         break;
 727                     }
 728                 }
 729                 break;
 730
 731             default: /* ? bit DIB */
 732                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 733                 break;
 734             }
 735         }
 736         /* Otherwise, get bits from the XImage */
 737         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
 738         {
 739             GDI_ReleaseObj( hdc );
 740             GDI_ReleaseObj( hbitmap );
 741
 742             return 0;
 743         }
 744     }
 745     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 746     {
 747         /* fill in struct members */
 748
 749         if( info->bmiHeader.biBitCount == 0)
 750         {
 751             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 752             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 753             info->bmiHeader.biPlanes = 1;
 754             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 755             info->bmiHeader.biSizeImage =
 756                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 757                                                    bmp->bitmap.bmHeight,
 758                                                    bmp->bitmap.bmBitsPixel );
 759             info->bmiHeader.biCompression = 0;
 760         }
 761         else
 762         {
 763             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 764                                                info->bmiHeader.biWidth,
 765                                                info->bmiHeader.biHeight,
 766                                                info->bmiHeader.biBitCount );
 767         }
 768     }
 769
 770     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 771           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 772           info->bmiHeader.biHeight);
 773
 774     GDI_ReleaseObj( hdc );
 775     GDI_ReleaseObj( hbitmap );
 776
 777     return lines;
 778 }
 779
 780
 781 /***********************************************************************
 782  *           CreateDIBitmap    (GDI.442)
 783  */
 784 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
 785                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
 786                             UINT16 coloruse )
 787 {
 788     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
 789 }
 790
 791
 792 /***********************************************************************
 793  *           CreateDIBitmap    (GDI32.@)
 794  */
 795 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 796                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 797                             UINT coloruse )
 798 {
 799     HBITMAP handle;
 800     BOOL fColor;
 801     DWORD width;
 802     int height;
 803     WORD bpp;
 804     WORD compr;
 805
 806     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 807     if (height < 0) height = -height;
 808
 809     /* Check if we should create a monochrome or color bitmap. */
 810     /* We create a monochrome bitmap only if it has exactly 2  */
 811     /* colors, which are black followed by white, nothing else.  */
 812     /* In all other cases, we create a color bitmap.           */
 813
 814     if (bpp != 1) fColor = TRUE;
 815     else if ((coloruse != DIB_RGB_COLORS) ||
 816              (init != CBM_INIT) || !data) fColor = FALSE;
 817     else
 818     {
 819         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 820         {
 821             RGBQUAD *rgb = data->bmiColors;
 822             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 823
 824             /* Check if the first color of the colormap is black */
 825             if ((col == RGB(0,0,0)))
 826             {
 827                 rgb++;
 828                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 829                 /* If the second color is white, create a monochrome bitmap */
 830                 fColor =  (col != RGB(0xff,0xff,0xff));
 831             }
 832             /* Note : If the first color of the colormap is white
 833                followed by black, we have to create a color bitmap.
 834                If we don't the white will be displayed in black later on!*/
 835             else fColor = TRUE;
 836         }
 837         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 838         {
 839             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 840             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 841             if ((col == RGB(0,0,0)))
 842             {
 843                 rgb++;
 844                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 845                 fColor = (col != RGB(0xff,0xff,0xff));
 846             }
 847             else fColor = TRUE;
 848         }
 849         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 850         { /* FIXME: correct ? */
 851             RGBQUAD *rgb = data->bmiColors;
 852             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 853
 854             /* Check if the first color of the colormap is black */
 855             if ((col == RGB(0,0,0)))
 856             {
 857                 rgb++;
 858                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 859                 /* If the second color is white, create a monochrome bitmap */
 860                 fColor =  (col != RGB(0xff,0xff,0xff));
 861             }
 862             /* Note : If the first color of the colormap is white
 863                followed by black, we have to create a color bitmap.
 864                If we don't the white will be displayed in black later on!*/
 865             else fColor = TRUE;
 866         }
 867         else
 868         {
 869             ERR("(%ld): wrong/unknown size for data\n",
 870                      data->bmiHeader.biSize );
 871             return 0;
 872         }
 873     }
 874
 875     /* Now create the bitmap */
 876
 877     if (fColor)
 878         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 879                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 880     else handle = CreateBitmap( width, height, 1, 1, NULL );
 881
 882     if (!handle) return 0;
 883
 884     if (init == CBM_INIT)
 885         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 886     return handle;
 887 }
 888
 889 /***********************************************************************
 890  *           CreateDIBSection    (GDI.489)
 891  */
 892 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 893                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 894 {
 895     LPVOID bits32;
 896     HBITMAP hbitmap;
 897
 898     hbitmap = CreateDIBSection( hdc, bmi, usage, &bits32, section, offset );
 899     if (hbitmap)
 900     {
 901         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 902         if (bmp && bmp->dib && bits32)
 903         {
 904             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 905             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 906             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 907             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 908                          bi->biSizeImage : width_bytes * height;
 909
 910             WORD sel = SELECTOR_AllocBlock( bits32, size, WINE_LDT_FLAGS_DATA );
 911             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 912             if (bits16) *bits16 = bmp->segptr_bits;
 913         }
 914         if (bmp) GDI_ReleaseObj( hbitmap );
 915     }
 916     return hbitmap;
 917 }
 918
 919 /***********************************************************************
 920  *           DIB_CreateDIBSection
 921  */
 922 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 923                              LPVOID *bits, HANDLE section,
 924                              DWORD offset, DWORD ovr_pitch)
 925 {
 926     HBITMAP hbitmap = 0;
 927     DC *dc;
 928     BOOL bDesktopDC = FALSE;
 929
 930     /* If the reference hdc is null, take the desktop dc */
 931     if (hdc == 0)
 932     {
 933         hdc = CreateCompatibleDC(0);
 934         bDesktopDC = TRUE;
 935     }
 936
 937     if ((dc = DC_GetDCPtr( hdc )))
 938     {
 939         hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset, ovr_pitch);
 940         GDI_ReleaseObj(hdc);
 941     }
 942
 943     if (bDesktopDC)
 944       DeleteDC(hdc);
 945
 946     return hbitmap;
 947 }
 948
 949 /***********************************************************************
 950  *           CreateDIBSection    (GDI32.@)
 951  */
 952 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 953                                 LPVOID *bits, HANDLE section,
 954                                 DWORD offset)
 955 {
 956     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 957 }
 958
 959 /***********************************************************************
 960  *           DIB_DeleteDIBSection
 961  */
 962 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
 963 {
 964     if (bmp && bmp->dib)
 965     {
 966         DIBSECTION *dib = bmp->dib;
 967
 968         if (dib->dsBm.bmBits)
 969         {
 970             if (dib->dshSection)
 971             {
 972                 SYSTEM_INFO SystemInfo;
 973                 GetSystemInfo( &SystemInfo );
 974                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 975                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 976             }
 977             else if (!dib->dsOffset)
 978                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 979         }
 980
 981         BITMAP_Driver->pDeleteDIBSection(bmp);
 982
 983         HeapFree(GetProcessHeap(), 0, dib);
 984         bmp->dib = NULL;
 985         if (bmp->segptr_bits) SELECTOR_FreeBlock( SELECTOROF(bmp->segptr_bits) );
 986     }
 987 }
 988
 989 /***********************************************************************
 990  *           DIB_CreateDIBFromBitmap
 991  *  Allocates a packed DIB and copies the bitmap data into it.
 992  */
 993 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 994 {
 995     BITMAPOBJ *pBmp = NULL;
 996     HGLOBAL hPackedDIB = 0;
 997     LPBYTE pPackedDIB = NULL;
 998     LPBITMAPINFOHEADER pbmiHeader = NULL;
 999     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
1000                  OffsetBits = 0, nLinesCopied = 0;
1001
1002     /* Get a pointer to the BITMAPOBJ structure */
1003     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1004     if (!pBmp) return hPackedDIB;
1005
1006     /* Get the bitmap dimensions */
1007     width = pBmp->bitmap.bmWidth;
1008     height = pBmp->bitmap.bmHeight;
1009     depth = pBmp->bitmap.bmBitsPixel;
1010
1011     /*
1012      * A packed DIB contains a BITMAPINFO structure followed immediately by
1013      * an optional color palette and the pixel data.
1014      */
1015
1016     /* Calculate the size of the packed DIB */
1017     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1018     cPackedSize = sizeof(BITMAPINFOHEADER)
1019                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1020                   + cDataSize;
1021     /* Get the offset to the bits */
1022     OffsetBits = cPackedSize - cDataSize;
1023
1024     /* Allocate the packed DIB */
1025     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1026     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1027                              cPackedSize );
1028     if ( !hPackedDIB )
1029     {
1030         WARN("Could not allocate packed DIB!\n");
1031         goto END;
1032     }
1033
1034     /* A packed DIB starts with a BITMAPINFOHEADER */
1035     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1036     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1037
1038     /* Init the BITMAPINFOHEADER */
1039     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1040     pbmiHeader->biWidth = width;
1041     pbmiHeader->biHeight = height;
1042     pbmiHeader->biPlanes = 1;
1043     pbmiHeader->biBitCount = depth;
1044     pbmiHeader->biCompression = BI_RGB;
1045     pbmiHeader->biSizeImage = 0;
1046     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1047     pbmiHeader->biClrUsed = 0;
1048     pbmiHeader->biClrImportant = 0;
1049
1050     /* Retrieve the DIB bits from the bitmap and fill in the
1051      * DIB color table if present */
1052
1053     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1054                              hBmp,                      /* Handle to bitmap */
1055                              0,                         /* First scan line to set in dest bitmap */
1056                              height,                    /* Number of scan lines to copy */
1057                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1058                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1059                              0);                        /* RGB or palette index */
1060     GlobalUnlock(hPackedDIB);
1061
1062     /* Cleanup if GetDIBits failed */
1063     if (nLinesCopied != height)
1064     {
1065         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1066         GlobalFree(hPackedDIB);
1067         hPackedDIB = 0;
1068     }
1069
1070 END:
1071     GDI_ReleaseObj( hBmp );
1072     return hPackedDIB;
1073 }