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