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 "wine/debug.h"
  31 #include "palette.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  34
  35 /***********************************************************************
  36  *           DIB_GetDIBWidthBytes
  37  *
  38  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  39  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  40  */
  41 int DIB_GetDIBWidthBytes( int width, int depth )
  42 {
  43     int words;
  44
  45     switch(depth)
  46     {
  47         case 1:  words = (width + 31) / 32; break;
  48         case 4:  words = (width + 7) / 8; break;
  49         case 8:  words = (width + 3) / 4; break;
  50         case 15:
  51         case 16: words = (width + 1) / 2; break;
  52         case 24: words = (width * 3 + 3)/4; break;
  53
  54         default:
  55             WARN("(%d): Unsupported depth\n", depth );
  56         /* fall through */
  57         case 32:
  58                 words = width;
  59     }
  60     return 4 * words;
  61 }
  62
  63 /***********************************************************************
  64  *           DIB_GetDIBImageBytes
  65  *
  66  * Return the number of bytes used to hold the image in a DIB bitmap.
  67  */
  68 int DIB_GetDIBImageBytes( int width, int height, int depth )
  69 {
  70     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  71 }
  72
  73
  74 /***********************************************************************
  75  *           DIB_BitmapInfoSize
  76  *
  77  * Return the size of the bitmap info structure including color table.
  78  */
  79 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  80 {
  81     int colors;
  82
  83     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  84     {
  85         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  86         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  87         return sizeof(BITMAPCOREHEADER) + colors *
  88              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  89     }
  90     else  /* assume BITMAPINFOHEADER */
  91     {
  92         colors = info->bmiHeader.biClrUsed;
  93         if (!colors && (info->bmiHeader.biBitCount <= 8))
  94             colors = 1 << info->bmiHeader.biBitCount;
  95         return sizeof(BITMAPINFOHEADER) + colors *
  96                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  97     }
  98 }
  99
 100
 101 /***********************************************************************
 102  *           DIB_GetBitmapInfo
 103  *
 104  * Get the info from a bitmap header.
 105  * Return 1 for INFOHEADER, 0 for COREHEADER,
 106  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
 107  */
 108 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
 109                               int *height, WORD *bpp, WORD *compr )
 110 {
 111     if (header->biSize == sizeof(BITMAPINFOHEADER))
 112     {
 113         *width  = header->biWidth;
 114         *height = header->biHeight;
 115         *bpp    = header->biBitCount;
 116         *compr  = header->biCompression;
 117         return 1;
 118     }
 119     if (header->biSize == sizeof(BITMAPCOREHEADER))
 120     {
 121         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 122         *width  = core->bcWidth;
 123         *height = core->bcHeight;
 124         *bpp    = core->bcBitCount;
 125         *compr  = 0;
 126         return 0;
 127     }
 128     if (header->biSize == sizeof(BITMAPV4HEADER))
 129     {
 130         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 131         *width  = v4hdr->bV4Width;
 132         *height = v4hdr->bV4Height;
 133         *bpp    = v4hdr->bV4BitCount;
 134         *compr  = v4hdr->bV4V4Compression;
 135         return 4;
 136     }
 137     if (header->biSize == sizeof(BITMAPV5HEADER))
 138     {
 139         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 140         *width  = v5hdr->bV5Width;
 141         *height = v5hdr->bV5Height;
 142         *bpp    = v5hdr->bV5BitCount;
 143         *compr  = v5hdr->bV5Compression;
 144         return 5;
 145     }
 146     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 147     return -1;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           StretchDIBits   (GDI32.@)
 153  */
 154 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 155                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 156                        INT heightSrc, const void *bits,
 157                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 158 {
 159     DC *dc;
 160
 161     if (!bits || !info)
 162         return 0;
 163
 164     dc = DC_GetDCUpdate( hdc );
 165     if(!dc) return FALSE;
 166
 167     if(dc->funcs->pStretchDIBits)
 168     {
 169         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 170                                               heightDst, xSrc, ySrc, widthSrc,
 171                                               heightSrc, bits, info, wUsage, dwRop);
 172         GDI_ReleaseObj( hdc );
 173     }
 174     else /* use StretchBlt */
 175     {
 176         HBITMAP hBitmap, hOldBitmap;
 177         HDC hdcMem;
 178
 179         GDI_ReleaseObj( hdc );
 180         hdcMem = CreateCompatibleDC( hdc );
 181         hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 182                                          info->bmiHeader.biHeight);
 183         hOldBitmap = SelectObject( hdcMem, hBitmap );
 184
 185         if (info->bmiHeader.biCompression == BI_RLE4 ||
 186             info->bmiHeader.biCompression == BI_RLE8) {
 187
 188            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 189             * contain all the rectangle described in bmiHeader, but only part of it.
 190             * This mean that those undescribed pixels must be left untouched.
 191             * So, we first copy on a memory bitmap the current content of the
 192             * destination rectangle, blit the DIB bits on top of it - hence leaving
 193             * the gaps untouched -, and blitting the rectangle back.
 194             * This insure that gaps are untouched on the destination rectangle
 195             * Not doing so leads to trashed images (the gaps contain what was on the
 196             * memory bitmap => generally black or garbage)
 197             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 198             * another speed vs correctness issue. Anyway, if speed is needed, then the
 199             * pStretchDIBits function shall be implemented.
 200             * ericP (2000/09/09)
 201             */
 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         }
 208
 209         SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 210                      info, wUsage);
 211
 212         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 213            left (negative biHeight) */
 214         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 215                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 216                     widthSrc, heightSrc, dwRop );
 217         SelectObject( hdcMem, hOldBitmap );
 218         DeleteDC( hdcMem );
 219         DeleteObject( hBitmap );
 220     }
 221     return heightSrc;
 222 }
 223
 224
 225 /******************************************************************************
 226  * SetDIBits [GDI32.@]  Sets pixels in a bitmap using colors from DIB
 227  *
 228  * PARAMS
 229  *    hdc       [I] Handle to device context
 230  *    hbitmap   [I] Handle to bitmap
 231  *    startscan [I] Starting scan line
 232  *    lines     [I] Number of scan lines
 233  *    bits      [I] Array of bitmap bits
 234  *    info      [I] Address of structure with data
 235  *    coloruse  [I] Type of color indexes to use
 236  *
 237  * RETURNS
 238  *    Success: Number of scan lines copied
 239  *    Failure: 0
 240  */
 241 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
 242                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
 243                       UINT coloruse )
 244 {
 245     DC *dc;
 246     BITMAPOBJ *bitmap;
 247     INT result = 0;
 248
 249     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
 250
 251     if (!(dc = DC_GetDCUpdate( hdc )))
 252     {
 253         if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
 254         GDI_ReleaseObj( hbitmap );
 255         return 0;
 256     }
 257
 258     if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
 259
 260     if (bitmap->funcs && bitmap->funcs->pSetDIBits)
 261         result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
 262                                             bits, info, coloruse );
 263     else
 264         result = lines;
 265
 266  done:
 267     GDI_ReleaseObj( hdc );
 268     GDI_ReleaseObj( hbitmap );
 269     return result;
 270 }
 271
 272
 273 /***********************************************************************
 274  *           SetDIBitsToDevice   (GDI32.@)
 275  */
 276 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
 277                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
 278                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
 279                            UINT coloruse )
 280 {
 281     INT ret;
 282     DC *dc;
 283
 284     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 285
 286     if(dc->funcs->pSetDIBitsToDevice)
 287         ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
 288                                              ySrc, startscan, lines, bits,
 289                                              info, coloruse );
 290     else {
 291         FIXME("unimplemented on hdc %p\n", hdc);
 292         ret = 0;
 293     }
 294
 295     GDI_ReleaseObj( hdc );
 296     return ret;
 297 }
 298
 299 /***********************************************************************
 300  *           SetDIBColorTable    (GDI32.@)
 301  */
 302 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 303 {
 304     DC * dc;
 305     UINT result = 0;
 306
 307     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 308
 309     if (dc->funcs->pSetDIBColorTable)
 310         result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
 311
 312     GDI_ReleaseObj( hdc );
 313     return result;
 314 }
 315
 316
 317 /***********************************************************************
 318  *           GetDIBColorTable    (GDI32.@)
 319  */
 320 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
 321 {
 322     DC * dc;
 323     UINT result = 0;
 324
 325     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 326
 327     if (dc->funcs->pGetDIBColorTable)
 328         result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
 329
 330     GDI_ReleaseObj( hdc );
 331     return result;
 332 }
 333
 334 /* FIXME the following two structs should be combined with __sysPalTemplate in
 335    objects/color.c - this should happen after de-X11-ing both of these
 336    files.
 337    NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
 338    and blue - sigh */
 339
 340 static RGBQUAD EGAColors[16] = {
 341 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 342     { 0x00, 0x00, 0x00, 0x00 },
 343     { 0x00, 0x00, 0x80, 0x00 },
 344     { 0x00, 0x80, 0x00, 0x00 },
 345     { 0x00, 0x80, 0x80, 0x00 },
 346     { 0x80, 0x00, 0x00, 0x00 },
 347     { 0x80, 0x00, 0x80, 0x00 },
 348     { 0x80, 0x80, 0x00, 0x00 },
 349     { 0x80, 0x80, 0x80, 0x00 },
 350     { 0xc0, 0xc0, 0xc0, 0x00 },
 351     { 0x00, 0x00, 0xff, 0x00 },
 352     { 0x00, 0xff, 0x00, 0x00 },
 353     { 0x00, 0xff, 0xff, 0x00 },
 354     { 0xff, 0x00, 0x00, 0x00 },
 355     { 0xff, 0x00, 0xff, 0x00 },
 356     { 0xff, 0xff, 0x00, 0x00 },
 357     { 0xff, 0xff, 0xff, 0x00 }
 358 };
 359
 360
 361 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
 362 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
 363     { 0x00, 0x00, 0x00, 0x00 },
 364     { 0x00, 0x00, 0x80, 0x00 },
 365     { 0x00, 0x80, 0x00, 0x00 },
 366     { 0x00, 0x80, 0x80, 0x00 },
 367     { 0x80, 0x00, 0x00, 0x00 },
 368     { 0x80, 0x00, 0x80, 0x00 },
 369     { 0x80, 0x80, 0x00, 0x00 },
 370     { 0xc0, 0xc0, 0xc0, 0x00 },
 371     { 0xc0, 0xdc, 0xc0, 0x00 },
 372     { 0xf0, 0xca, 0xa6, 0x00 },
 373     { 0xf0, 0xfb, 0xff, 0x00 },
 374     { 0xa4, 0xa0, 0xa0, 0x00 },
 375     { 0x80, 0x80, 0x80, 0x00 },
 376     { 0x00, 0x00, 0xf0, 0x00 },
 377     { 0x00, 0xff, 0x00, 0x00 },
 378     { 0x00, 0xff, 0xff, 0x00 },
 379     { 0xff, 0x00, 0x00, 0x00 },
 380     { 0xff, 0x00, 0xff, 0x00 },
 381     { 0xff, 0xff, 0x00, 0x00 },
 382     { 0xff, 0xff, 0xff, 0x00 }
 383 };
 384
 385
 386 /******************************************************************************
 387  * GetDIBits [GDI32.@]  Retrieves bits of bitmap and copies to buffer
 388  *
 389  * RETURNS
 390  *    Success: Number of scan lines copied from bitmap
 391  *    Failure: 0
 392  *
 393  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 394  */
 395 INT WINAPI GetDIBits(
 396     HDC hdc,         /* [in]  Handle to device context */
 397     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 398     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 399     UINT lines,      /* [in]  Number of scan lines to copy */
 400     LPVOID bits,       /* [out] Address of array for bitmap bits */
 401     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 402     UINT coloruse)   /* [in]  RGB or palette index */
 403 {
 404     DC * dc;
 405     BITMAPOBJ * bmp;
 406     int i;
 407
 408     if (!info) return 0;
 409     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 410     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 411     {
 412         GDI_ReleaseObj( hdc );
 413         return 0;
 414     }
 415
 416     /* Transfer color info */
 417
 418     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 419
 420         info->bmiHeader.biClrUsed = 0;
 421
 422         /* If the bitmap object already has a dib section at the
 423            same color depth then get the color map from it */
 424         if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
 425             GetDIBColorTable(hdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
 426         }
 427         else {
 428             if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 429                 /* Generate the color map from the selected palette */
 430                 PALETTEENTRY * palEntry;
 431                 PALETTEOBJ * palette;
 432                 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
 433                     GDI_ReleaseObj( hdc );
 434                     GDI_ReleaseObj( hbitmap );
 435                     return 0;
 436                 }
 437                 palEntry = palette->logpalette.palPalEntry;
 438                 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 439                     if (coloruse == DIB_RGB_COLORS) {
 440                         info->bmiColors[i].rgbRed      = palEntry->peRed;
 441                         info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 442                         info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 443                         info->bmiColors[i].rgbReserved = 0;
 444                     }
 445                     else ((WORD *)info->bmiColors)[i] = (WORD)i;
 446                 }
 447                 GDI_ReleaseObj( dc->hPalette );
 448             } else {
 449                 switch (info->bmiHeader.biBitCount) {
 450                 case 1:
 451                     info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 452                         info->bmiColors[0].rgbBlue = 0;
 453                     info->bmiColors[0].rgbReserved = 0;
 454                     info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 455                         info->bmiColors[1].rgbBlue = 0xff;
 456                     info->bmiColors[1].rgbReserved = 0;
 457                     break;
 458
 459                 case 4:
 460                     memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 461                     break;
 462
 463                 case 8:
 464                     {
 465                         INT r, g, b;
 466                         RGBQUAD *color;
 467
 468                         memcpy(info->bmiColors, DefLogPalette,
 469                                10 * sizeof(RGBQUAD));
 470                         memcpy(info->bmiColors + 246, DefLogPalette + 10,
 471                                10 * sizeof(RGBQUAD));
 472                         color = info->bmiColors + 10;
 473                         for(r = 0; r <= 5; r++) /* FIXME */
 474                             for(g = 0; g <= 5; g++)
 475                                 for(b = 0; b <= 5; b++) {
 476                                     color->rgbRed =   (r * 0xff) / 5;
 477                                     color->rgbGreen = (g * 0xff) / 5;
 478                                     color->rgbBlue =  (b * 0xff) / 5;
 479                                     color->rgbReserved = 0;
 480                                     color++;
 481                                 }
 482                     }
 483                 }
 484             }
 485         }
 486     }
 487
 488     if (bits && lines)
 489     {
 490         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 491         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 492         {
 493             /*FIXME: Only RGB dibs supported for now */
 494             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 495             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 496             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 497             unsigned int x, y;
 498
 499             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 500             {
 501                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 502                 dstwidthb = -dstwidthb;
 503             }
 504
 505             switch( info->bmiHeader.biBitCount ) {
 506
 507             case 15:
 508             case 16: /* 16 bpp dstDIB */
 509                 {
 510                     LPWORD dstbits = (LPWORD)dbits;
 511                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 512
 513                     /* FIXME: BI_BITFIELDS not supported yet */
 514
 515                     switch(bmp->dib->dsBm.bmBitsPixel) {
 516
 517                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 518                         {
 519                             /* FIXME: BI_BITFIELDS not supported yet */
 520                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 521                                 memcpy(dbits, sbits, srcwidthb);
 522                         }
 523                         break;
 524
 525                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 526                         {
 527                             LPBYTE srcbits = sbits;
 528
 529                             for( y = 0; y < lines; y++) {
 530                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 531                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 532                                                  (((WORD)srcbits[1] << 2) & gmask) |
 533                                                  (((WORD)srcbits[2] << 7) & rmask);
 534
 535                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 536                                 srcbits = (sbits += srcwidthb);
 537                             }
 538                         }
 539                         break;
 540
 541                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 542                         {
 543                             LPDWORD srcbits = (LPDWORD)sbits;
 544                             DWORD val;
 545
 546                             for( y = 0; y < lines; y++) {
 547                                 for( x = 0; x < srcwidth; x++ ) {
 548                                     val = *srcbits++;
 549                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 550                                                        ((val >> 9) & rmask));
 551                                 }
 552                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 553                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 554                             }
 555                         }
 556                         break;
 557
 558                     default: /* ? bit bmp -> 16 bit DIB */
 559                         FIXME("15/16 bit DIB %d bit bitmap\n",
 560                         bmp->bitmap.bmBitsPixel);
 561                         break;
 562                     }
 563                 }
 564                 break;
 565
 566             case 24: /* 24 bpp dstDIB */
 567                 {
 568                     LPBYTE dstbits = dbits;
 569
 570                     switch(bmp->dib->dsBm.bmBitsPixel) {
 571
 572                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 573                         {
 574                             LPWORD srcbits = (LPWORD)sbits;
 575                             WORD val;
 576
 577                             /* FIXME: BI_BITFIELDS not supported yet */
 578                             for( y = 0; y < lines; y++) {
 579                                 for( x = 0; x < srcwidth; x++ ) {
 580                                     val = *srcbits++;
 581                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 582                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 583                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 584                                 }
 585                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 586                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 587                             }
 588                         }
 589                         break;
 590
 591                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 592                         {
 593                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 594                                 memcpy(dbits, sbits, srcwidthb);
 595                         }
 596                         break;
 597
 598                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 599                         {
 600                             LPBYTE srcbits = (LPBYTE)sbits;
 601
 602                             for( y = 0; y < lines; y++) {
 603                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 604                                     *dstbits++ = *srcbits++;
 605                                     *dstbits++ = *srcbits++;
 606                                     *dstbits++ = *srcbits++;
 607                                 }
 608                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 609                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 610                             }
 611                         }
 612                         break;
 613
 614                     default: /* ? bit bmp -> 24 bit DIB */
 615                         FIXME("24 bit DIB %d bit bitmap\n",
 616                               bmp->bitmap.bmBitsPixel);
 617                         break;
 618                     }
 619                 }
 620                 break;
 621
 622             case 32: /* 32 bpp dstDIB */
 623                 {
 624                     LPDWORD dstbits = (LPDWORD)dbits;
 625
 626                     /* FIXME: BI_BITFIELDS not supported yet */
 627
 628                     switch(bmp->dib->dsBm.bmBitsPixel) {
 629                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 630                         {
 631                             LPWORD srcbits = (LPWORD)sbits;
 632                             DWORD val;
 633
 634                             /* FIXME: BI_BITFIELDS not supported yet */
 635                             for( y = 0; y < lines; y++) {
 636                                 for( x = 0; x < srcwidth; x++ ) {
 637                                     val = (DWORD)*srcbits++;
 638                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 639                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 640                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 641                                 }
 642                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 643                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 644                             }
 645                         }
 646                         break;
 647
 648                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 649                         {
 650                             LPBYTE srcbits = sbits;
 651
 652                             for( y = 0; y < lines; y++) {
 653                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 654                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 655                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 656                                 srcbits=(sbits+=srcwidthb);
 657                             }
 658                         }
 659                         break;
 660
 661                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 662                         {
 663                             /* FIXME: BI_BITFIELDS not supported yet */
 664                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 665                                 memcpy(dbits, sbits, srcwidthb);
 666                         }
 667                         break;
 668
 669                     default: /* ? bit bmp -> 32 bit DIB */
 670                         FIXME("32 bit DIB %d bit bitmap\n",
 671                         bmp->bitmap.bmBitsPixel);
 672                         break;
 673                     }
 674                 }
 675                 break;
 676
 677             default: /* ? bit DIB */
 678                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 679                 break;
 680             }
 681         }
 682         /* Otherwise, get bits from the XImage */
 683         else
 684         {
 685             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 686             else
 687             {
 688                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 689                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 690                                                     lines, bits, info, coloruse );
 691                 else
 692                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 693             }
 694         }
 695     }
 696     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 697     {
 698         /* fill in struct members */
 699
 700         if( info->bmiHeader.biBitCount == 0)
 701         {
 702             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 703             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 704             info->bmiHeader.biPlanes = 1;
 705             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 706             info->bmiHeader.biSizeImage =
 707                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 708                                                    bmp->bitmap.bmHeight,
 709                                                    bmp->bitmap.bmBitsPixel );
 710             info->bmiHeader.biCompression = 0;
 711         }
 712         else
 713         {
 714             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 715                                                info->bmiHeader.biWidth,
 716                                                info->bmiHeader.biHeight,
 717                                                info->bmiHeader.biBitCount );
 718         }
 719     }
 720
 721     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 722           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 723           info->bmiHeader.biHeight);
 724
 725     GDI_ReleaseObj( hdc );
 726     GDI_ReleaseObj( hbitmap );
 727
 728     return lines;
 729 }
 730
 731
 732 /***********************************************************************
 733  *           CreateDIBitmap    (GDI32.@)
 734  */
 735 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 736                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 737                             UINT coloruse )
 738 {
 739     HBITMAP handle;
 740     BOOL fColor;
 741     DWORD width;
 742     int height;
 743     WORD bpp;
 744     WORD compr;
 745     DC *dc;
 746
 747     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 748     if (height < 0) height = -height;
 749
 750     /* Check if we should create a monochrome or color bitmap. */
 751     /* We create a monochrome bitmap only if it has exactly 2  */
 752     /* colors, which are black followed by white, nothing else.  */
 753     /* In all other cases, we create a color bitmap.           */
 754
 755     if (bpp != 1) fColor = TRUE;
 756     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 757     else
 758     {
 759         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 760         {
 761             RGBQUAD *rgb = data->bmiColors;
 762             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 763
 764             /* Check if the first color of the colormap is black */
 765             if ((col == RGB(0,0,0)))
 766             {
 767                 rgb++;
 768                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 769                 /* If the second color is white, create a monochrome bitmap */
 770                 fColor =  (col != RGB(0xff,0xff,0xff));
 771             }
 772             /* Note : If the first color of the colormap is white
 773                followed by black, we have to create a color bitmap.
 774                If we don't the white will be displayed in black later on!*/
 775             else fColor = TRUE;
 776         }
 777         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 778         {
 779             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 780             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 781             if ((col == RGB(0,0,0)))
 782             {
 783                 rgb++;
 784                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 785                 fColor = (col != RGB(0xff,0xff,0xff));
 786             }
 787             else fColor = TRUE;
 788         }
 789         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 790         { /* FIXME: correct ? */
 791             RGBQUAD *rgb = data->bmiColors;
 792             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 793
 794             /* Check if the first color of the colormap is black */
 795             if ((col == RGB(0,0,0)))
 796             {
 797                 rgb++;
 798                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 799                 /* If the second color is white, create a monochrome bitmap */
 800                 fColor =  (col != RGB(0xff,0xff,0xff));
 801             }
 802             /* Note : If the first color of the colormap is white
 803                followed by black, we have to create a color bitmap.
 804                If we don't the white will be displayed in black later on!*/
 805             else fColor = TRUE;
 806         }
 807         else
 808         {
 809             ERR("(%ld): wrong/unknown size for data\n",
 810                      data->bmiHeader.biSize );
 811             return 0;
 812         }
 813     }
 814
 815     /* Now create the bitmap */
 816
 817     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 818
 819     if (fColor)
 820         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 821                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 822     else handle = CreateBitmap( width, height, 1, 1, NULL );
 823
 824     if (handle)
 825     {
 826         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 827         else if (!BITMAP_SetOwnerDC( handle, dc ))
 828         {
 829             DeleteObject( handle );
 830             handle = 0;
 831         }
 832     }
 833
 834     GDI_ReleaseObj( hdc );
 835     return handle;
 836 }
 837
 838 /***********************************************************************
 839  *           CreateDIBSection    (GDI.489)
 840  */
 841 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 842                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 843 {
 844     LPVOID bits32;
 845     HBITMAP hbitmap;
 846
 847     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 848     if (hbitmap)
 849     {
 850         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 851         if (bmp && bmp->dib && bits32)
 852         {
 853             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 854             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 855             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 856             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 857                          bi->biSizeImage : width_bytes * height;
 858
 859             /* calculate number of sel's needed for size with 64K steps */
 860             WORD count = (size + 0xffff) / 0x10000;
 861             WORD sel = AllocSelectorArray16(count);
 862             int i;
 863
 864             for (i = 0; i < count; i++)
 865             {
 866                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 867                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 868                 size -= 0x10000;
 869             }
 870             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 871             if (bits16) *bits16 = bmp->segptr_bits;
 872         }
 873         if (bmp) GDI_ReleaseObj( hbitmap );
 874     }
 875     return HBITMAP_16(hbitmap);
 876 }
 877
 878 /***********************************************************************
 879  *           DIB_CreateDIBSection
 880  */
 881 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 882                              LPVOID *bits, HANDLE section,
 883                              DWORD offset, DWORD ovr_pitch)
 884 {
 885     HBITMAP hbitmap = 0;
 886     DC *dc;
 887     BOOL bDesktopDC = FALSE;
 888
 889     /* If the reference hdc is null, take the desktop dc */
 890     if (hdc == 0)
 891     {
 892         hdc = CreateCompatibleDC(0);
 893         bDesktopDC = TRUE;
 894     }
 895
 896     /* Windows ignores the supplied values of biClrUsed and biClrImportant thus: */
 897     if (bmi->bmiHeader.biBitCount >= 1 && bmi->bmiHeader.biBitCount <= 8)
 898         bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 1L << bmi->bmiHeader.biBitCount;
 899     else
 900         bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 0;
 901
 902     if ((dc = DC_GetDCPtr( hdc )))
 903     {
 904         if(dc->funcs->pCreateDIBSection)
 905             hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 906         GDI_ReleaseObj(hdc);
 907     }
 908
 909     if (bDesktopDC)
 910       DeleteDC(hdc);
 911
 912     return hbitmap;
 913 }
 914
 915 /***********************************************************************
 916  *           CreateDIBSection    (GDI32.@)
 917  */
 918 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 919                                 LPVOID *bits, HANDLE section,
 920                                 DWORD offset)
 921 {
 922     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 923 }
 924
 925 /***********************************************************************
 926  *           DIB_CreateDIBFromBitmap
 927  *  Allocates a packed DIB and copies the bitmap data into it.
 928  */
 929 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 930 {
 931     BITMAPOBJ *pBmp = NULL;
 932     HGLOBAL hPackedDIB = 0;
 933     LPBYTE pPackedDIB = NULL;
 934     LPBITMAPINFOHEADER pbmiHeader = NULL;
 935     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 936                  OffsetBits = 0, nLinesCopied = 0;
 937
 938     /* Get a pointer to the BITMAPOBJ structure */
 939     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 940     if (!pBmp) return hPackedDIB;
 941
 942     /* Get the bitmap dimensions */
 943     width = pBmp->bitmap.bmWidth;
 944     height = pBmp->bitmap.bmHeight;
 945     depth = pBmp->bitmap.bmBitsPixel;
 946
 947     /*
 948      * A packed DIB contains a BITMAPINFO structure followed immediately by
 949      * an optional color palette and the pixel data.
 950      */
 951
 952     /* Calculate the size of the packed DIB */
 953     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 954     cPackedSize = sizeof(BITMAPINFOHEADER)
 955                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 956                   + cDataSize;
 957     /* Get the offset to the bits */
 958     OffsetBits = cPackedSize - cDataSize;
 959
 960     /* Allocate the packed DIB */
 961     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 962     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 963                              cPackedSize );
 964     if ( !hPackedDIB )
 965     {
 966         WARN("Could not allocate packed DIB!\n");
 967         goto END;
 968     }
 969
 970     /* A packed DIB starts with a BITMAPINFOHEADER */
 971     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 972     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 973
 974     /* Init the BITMAPINFOHEADER */
 975     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 976     pbmiHeader->biWidth = width;
 977     pbmiHeader->biHeight = height;
 978     pbmiHeader->biPlanes = 1;
 979     pbmiHeader->biBitCount = depth;
 980     pbmiHeader->biCompression = BI_RGB;
 981     pbmiHeader->biSizeImage = 0;
 982     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
 983     pbmiHeader->biClrUsed = 0;
 984     pbmiHeader->biClrImportant = 0;
 985
 986     /* Retrieve the DIB bits from the bitmap and fill in the
 987      * DIB color table if present */
 988
 989     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
 990                              hBmp,                      /* Handle to bitmap */
 991                              0,                         /* First scan line to set in dest bitmap */
 992                              height,                    /* Number of scan lines to copy */
 993                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
 994                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
 995                              0);                        /* RGB or palette index */
 996     GlobalUnlock(hPackedDIB);
 997
 998     /* Cleanup if GetDIBits failed */
 999     if (nLinesCopied != height)
1000     {
1001         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1002         GlobalFree(hPackedDIB);
1003         hPackedDIB = 0;
1004     }
1005
1006 END:
1007     GDI_ReleaseObj( hBmp );
1008     return hPackedDIB;
1009 }