objects/dib.c

   1 /*
   2  * GDI device-independent bitmaps
   3  *
   4  * Copyright 1993,1994  Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "bitmap.h"
  28 #include "selectors.h"
  29 #include "gdi.h"
  30 #include "wownt32.h"
  31 #include "wine/debug.h"
  32 #include "palette.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  35
  36 /***********************************************************************
  37  *           DIB_GetDIBWidthBytes
  38  *
  39  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
  40  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
  41  */
  42 int DIB_GetDIBWidthBytes( int width, int depth )
  43 {
  44     int words;
  45
  46     switch(depth)
  47     {
  48         case 1:  words = (width + 31) / 32; break;
  49         case 4:  words = (width + 7) / 8; break;
  50         case 8:  words = (width + 3) / 4; break;
  51         case 15:
  52         case 16: words = (width + 1) / 2; break;
  53         case 24: words = (width * 3 + 3)/4; break;
  54
  55         default:
  56             WARN("(%d): Unsupported depth\n", depth );
  57         /* fall through */
  58         case 32:
  59                 words = width;
  60     }
  61     return 4 * words;
  62 }
  63
  64 /***********************************************************************
  65  *           DIB_GetDIBImageBytes
  66  *
  67  * Return the number of bytes used to hold the image in a DIB bitmap.
  68  */
  69 int DIB_GetDIBImageBytes( int width, int height, int depth )
  70 {
  71     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
  72 }
  73
  74
  75 /***********************************************************************
  76  *           DIB_BitmapInfoSize
  77  *
  78  * Return the size of the bitmap info structure including color table.
  79  */
  80 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
  81 {
  82     int colors;
  83
  84     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
  85     {
  86         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
  87         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
  88         return sizeof(BITMAPCOREHEADER) + colors *
  89              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
  90     }
  91     else  /* assume BITMAPINFOHEADER */
  92     {
  93         colors = info->bmiHeader.biClrUsed;
  94         if (!colors && (info->bmiHeader.biBitCount <= 8))
  95             colors = 1 << info->bmiHeader.biBitCount;
  96         return sizeof(BITMAPINFOHEADER) + colors *
  97                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
  98     }
  99 }
 100
 101
 102 /***********************************************************************
 103  *           DIB_GetBitmapInfo
 104  *
 105  * Get the info from a bitmap header.
 106  * Return 1 for INFOHEADER, 0 for COREHEADER,
 107  * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
 108  */
 109 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
 110                               int *height, WORD *bpp, WORD *compr )
 111 {
 112     if (header->biSize == sizeof(BITMAPINFOHEADER))
 113     {
 114         *width  = header->biWidth;
 115         *height = header->biHeight;
 116         *bpp    = header->biBitCount;
 117         *compr  = header->biCompression;
 118         return 1;
 119     }
 120     if (header->biSize == sizeof(BITMAPCOREHEADER))
 121     {
 122         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
 123         *width  = core->bcWidth;
 124         *height = core->bcHeight;
 125         *bpp    = core->bcBitCount;
 126         *compr  = 0;
 127         return 0;
 128     }
 129     if (header->biSize == sizeof(BITMAPV4HEADER))
 130     {
 131         BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
 132         *width  = v4hdr->bV4Width;
 133         *height = v4hdr->bV4Height;
 134         *bpp    = v4hdr->bV4BitCount;
 135         *compr  = v4hdr->bV4V4Compression;
 136         return 4;
 137     }
 138     if (header->biSize == sizeof(BITMAPV5HEADER))
 139     {
 140         BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
 141         *width  = v5hdr->bV5Width;
 142         *height = v5hdr->bV5Height;
 143         *bpp    = v5hdr->bV5BitCount;
 144         *compr  = v5hdr->bV5Compression;
 145         return 5;
 146     }
 147     ERR("(%ld): unknown/wrong size for header\n", header->biSize );
 148     return -1;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           StretchDIBits   (GDI32.@)
 154  */
 155 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
 156                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
 157                        INT heightSrc, const void *bits,
 158                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
 159 {
 160     DC *dc;
 161
 162     if (!bits || !info)
 163         return 0;
 164
 165     dc = DC_GetDCUpdate( hdc );
 166     if(!dc) return FALSE;
 167
 168     if(dc->funcs->pStretchDIBits)
 169     {
 170         heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
 171                                               heightDst, xSrc, ySrc, widthSrc,
 172                                               heightSrc, bits, info, wUsage, dwRop);
 173         GDI_ReleaseObj( hdc );
 174     }
 175     else /* use StretchBlt */
 176     {
 177         HBITMAP hBitmap, hOldBitmap;
 178         HDC hdcMem;
 179
 180         GDI_ReleaseObj( hdc );
 181         hdcMem = CreateCompatibleDC( hdc );
 182         hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
 183                                          info->bmiHeader.biHeight);
 184         hOldBitmap = SelectObject( hdcMem, hBitmap );
 185
 186         if (info->bmiHeader.biCompression == BI_RLE4 ||
 187             info->bmiHeader.biCompression == BI_RLE8) {
 188
 189            /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
 190             * contain all the rectangle described in bmiHeader, but only part of it.
 191             * This mean that those undescribed pixels must be left untouched.
 192             * So, we first copy on a memory bitmap the current content of the
 193             * destination rectangle, blit the DIB bits on top of it - hence leaving
 194             * the gaps untouched -, and blitting the rectangle back.
 195             * This insure that gaps are untouched on the destination rectangle
 196             * Not doing so leads to trashed images (the gaps contain what was on the
 197             * memory bitmap => generally black or garbage)
 198             * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
 199             * another speed vs correctness issue. Anyway, if speed is needed, then the
 200             * pStretchDIBits function shall be implemented.
 201             * ericP (2000/09/09)
 202             */
 203
 204             /* copy existing bitmap from destination dc */
 205             StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 206                         widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
 207                         dwRop );
 208         }
 209
 210         SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
 211                      info, wUsage);
 212
 213         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
 214            left (negative biHeight) */
 215         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
 216                     hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
 217                     widthSrc, heightSrc, dwRop );
 218         SelectObject( hdcMem, hOldBitmap );
 219         DeleteDC( hdcMem );
 220         DeleteObject( hBitmap );
 221     }
 222     return heightSrc;
 223 }
 224
 225
 226 /******************************************************************************
 227  * SetDIBits [GDI32.@]  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.@]  Retrieves bits of bitmap and copies to buffer
 389  *
 390  * RETURNS
 391  *    Success: Number of scan lines copied from bitmap
 392  *    Failure: 0
 393  *
 394  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
 395  */
 396 INT WINAPI GetDIBits(
 397     HDC hdc,         /* [in]  Handle to device context */
 398     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 399     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
 400     UINT lines,      /* [in]  Number of scan lines to copy */
 401     LPVOID bits,       /* [out] Address of array for bitmap bits */
 402     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
 403     UINT coloruse)   /* [in]  RGB or palette index */
 404 {
 405     DC * dc;
 406     BITMAPOBJ * bmp;
 407     int i;
 408
 409     if (!info) return 0;
 410     if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
 411     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 412     {
 413         GDI_ReleaseObj( hdc );
 414         return 0;
 415     }
 416
 417     /* Transfer color info */
 418
 419     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
 420
 421         info->bmiHeader.biClrUsed = 0;
 422
 423         /* If the bitmap object already has a dib section at the
 424            same color depth then get the color map from it */
 425         if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
 426             GetDIBColorTable(hdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
 427         }
 428         else {
 429             if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
 430                 /* Generate the color map from the selected palette */
 431                 PALETTEENTRY * palEntry;
 432                 PALETTEOBJ * palette;
 433                 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
 434                     GDI_ReleaseObj( hdc );
 435                     GDI_ReleaseObj( hbitmap );
 436                     return 0;
 437                 }
 438                 palEntry = palette->logpalette.palPalEntry;
 439                 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
 440                     if (coloruse == DIB_RGB_COLORS) {
 441                         info->bmiColors[i].rgbRed      = palEntry->peRed;
 442                         info->bmiColors[i].rgbGreen    = palEntry->peGreen;
 443                         info->bmiColors[i].rgbBlue     = palEntry->peBlue;
 444                         info->bmiColors[i].rgbReserved = 0;
 445                     }
 446                     else ((WORD *)info->bmiColors)[i] = (WORD)i;
 447                 }
 448                 GDI_ReleaseObj( dc->hPalette );
 449             } else {
 450                 switch (info->bmiHeader.biBitCount) {
 451                 case 1:
 452                     info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
 453                         info->bmiColors[0].rgbBlue = 0;
 454                     info->bmiColors[0].rgbReserved = 0;
 455                     info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
 456                         info->bmiColors[1].rgbBlue = 0xff;
 457                     info->bmiColors[1].rgbReserved = 0;
 458                     break;
 459
 460                 case 4:
 461                     memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
 462                     break;
 463
 464                 case 8:
 465                     {
 466                         INT r, g, b;
 467                         RGBQUAD *color;
 468
 469                         memcpy(info->bmiColors, DefLogPalette,
 470                                10 * sizeof(RGBQUAD));
 471                         memcpy(info->bmiColors + 246, DefLogPalette + 10,
 472                                10 * sizeof(RGBQUAD));
 473                         color = info->bmiColors + 10;
 474                         for(r = 0; r <= 5; r++) /* FIXME */
 475                             for(g = 0; g <= 5; g++)
 476                                 for(b = 0; b <= 5; b++) {
 477                                     color->rgbRed =   (r * 0xff) / 5;
 478                                     color->rgbGreen = (g * 0xff) / 5;
 479                                     color->rgbBlue =  (b * 0xff) / 5;
 480                                     color->rgbReserved = 0;
 481                                     color++;
 482                                 }
 483                     }
 484                 }
 485             }
 486         }
 487     }
 488
 489     if (bits && lines)
 490     {
 491         /* If the bitmap object already have a dib section that contains image data, get the bits from it */
 492         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
 493         {
 494             /*FIXME: Only RGB dibs supported for now */
 495             unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
 496             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 497             LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
 498             unsigned int x, y;
 499
 500             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
 501             {
 502                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
 503                 dstwidthb = -dstwidthb;
 504             }
 505
 506             switch( info->bmiHeader.biBitCount ) {
 507
 508             case 15:
 509             case 16: /* 16 bpp dstDIB */
 510                 {
 511                     LPWORD dstbits = (LPWORD)dbits;
 512                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
 513
 514                     /* FIXME: BI_BITFIELDS not supported yet */
 515
 516                     switch(bmp->dib->dsBm.bmBitsPixel) {
 517
 518                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
 519                         {
 520                             /* FIXME: BI_BITFIELDS not supported yet */
 521                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 522                                 memcpy(dbits, sbits, srcwidthb);
 523                         }
 524                         break;
 525
 526                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
 527                         {
 528                             LPBYTE srcbits = sbits;
 529
 530                             for( y = 0; y < lines; y++) {
 531                                 for( x = 0; x < srcwidth; x++, srcbits += 3)
 532                                     *dstbits++ = ((srcbits[0] >> 3) & bmask) |
 533                                                  (((WORD)srcbits[1] << 2) & gmask) |
 534                                                  (((WORD)srcbits[2] << 7) & rmask);
 535
 536                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 537                                 srcbits = (sbits += srcwidthb);
 538                             }
 539                         }
 540                         break;
 541
 542                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 543                         {
 544                             LPDWORD srcbits = (LPDWORD)sbits;
 545                             DWORD val;
 546
 547                             for( y = 0; y < lines; y++) {
 548                                 for( x = 0; x < srcwidth; x++ ) {
 549                                     val = *srcbits++;
 550                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
 551                                                        ((val >> 9) & rmask));
 552                                 }
 553                                 dstbits = (LPWORD)(dbits+=dstwidthb);
 554                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
 555                             }
 556                         }
 557                         break;
 558
 559                     default: /* ? bit bmp -> 16 bit DIB */
 560                         FIXME("15/16 bit DIB %d bit bitmap\n",
 561                         bmp->bitmap.bmBitsPixel);
 562                         break;
 563                     }
 564                 }
 565                 break;
 566
 567             case 24: /* 24 bpp dstDIB */
 568                 {
 569                     LPBYTE dstbits = dbits;
 570
 571                     switch(bmp->dib->dsBm.bmBitsPixel) {
 572
 573                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
 574                         {
 575                             LPWORD srcbits = (LPWORD)sbits;
 576                             WORD val;
 577
 578                             /* FIXME: BI_BITFIELDS not supported yet */
 579                             for( y = 0; y < lines; y++) {
 580                                 for( x = 0; x < srcwidth; x++ ) {
 581                                     val = *srcbits++;
 582                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
 583                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
 584                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
 585                                 }
 586                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
 587                                 srcbits = (LPWORD)(sbits+=srcwidthb);
 588                             }
 589                         }
 590                         break;
 591
 592                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
 593                         {
 594                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 595                                 memcpy(dbits, sbits, srcwidthb);
 596                         }
 597                         break;
 598
 599                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
 600                         {
 601                             LPBYTE srcbits = (LPBYTE)sbits;
 602
 603                             for( y = 0; y < lines; y++) {
 604                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
 605                                     *dstbits++ = *srcbits++;
 606                                     *dstbits++ = *srcbits++;
 607                                     *dstbits++ = *srcbits++;
 608                                 }
 609                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
 610                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
 611                             }
 612                         }
 613                         break;
 614
 615                     default: /* ? bit bmp -> 24 bit DIB */
 616                         FIXME("24 bit DIB %d bit bitmap\n",
 617                               bmp->bitmap.bmBitsPixel);
 618                         break;
 619                     }
 620                 }
 621                 break;
 622
 623             case 32: /* 32 bpp dstDIB */
 624                 {
 625                     LPDWORD dstbits = (LPDWORD)dbits;
 626
 627                     /* FIXME: BI_BITFIELDS not supported yet */
 628
 629                     switch(bmp->dib->dsBm.bmBitsPixel) {
 630                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
 631                         {
 632                             LPWORD srcbits = (LPWORD)sbits;
 633                             DWORD val;
 634
 635                             /* FIXME: BI_BITFIELDS not supported yet */
 636                             for( y = 0; y < lines; y++) {
 637                                 for( x = 0; x < srcwidth; x++ ) {
 638                                     val = (DWORD)*srcbits++;
 639                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
 640                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
 641                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
 642                                 }
 643                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 644                                 srcbits=(LPWORD)(sbits+=srcwidthb);
 645                             }
 646                         }
 647                         break;
 648
 649                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
 650                         {
 651                             LPBYTE srcbits = sbits;
 652
 653                             for( y = 0; y < lines; y++) {
 654                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
 655                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
 656                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
 657                                 srcbits=(sbits+=srcwidthb);
 658                             }
 659                         }
 660                         break;
 661
 662                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
 663                         {
 664                             /* FIXME: BI_BITFIELDS not supported yet */
 665                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
 666                                 memcpy(dbits, sbits, srcwidthb);
 667                         }
 668                         break;
 669
 670                     default: /* ? bit bmp -> 32 bit DIB */
 671                         FIXME("32 bit DIB %d bit bitmap\n",
 672                         bmp->bitmap.bmBitsPixel);
 673                         break;
 674                     }
 675                 }
 676                 break;
 677
 678             default: /* ? bit DIB */
 679                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
 680                 break;
 681             }
 682         }
 683         /* Otherwise, get bits from the XImage */
 684         else
 685         {
 686             if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
 687             else
 688             {
 689                 if (bmp->funcs && bmp->funcs->pGetDIBits)
 690                     lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
 691                                                     lines, bits, info, coloruse );
 692                 else
 693                     lines = 0;  /* FIXME: should copy from bmp->bitmap.bmBits */
 694             }
 695         }
 696     }
 697     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
 698     {
 699         /* fill in struct members */
 700
 701         if( info->bmiHeader.biBitCount == 0)
 702         {
 703             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
 704             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
 705             info->bmiHeader.biPlanes = 1;
 706             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
 707             info->bmiHeader.biSizeImage =
 708                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
 709                                                    bmp->bitmap.bmHeight,
 710                                                    bmp->bitmap.bmBitsPixel );
 711             info->bmiHeader.biCompression = 0;
 712         }
 713         else
 714         {
 715             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
 716                                                info->bmiHeader.biWidth,
 717                                                info->bmiHeader.biHeight,
 718                                                info->bmiHeader.biBitCount );
 719         }
 720     }
 721
 722     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
 723           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
 724           info->bmiHeader.biHeight);
 725
 726     GDI_ReleaseObj( hdc );
 727     GDI_ReleaseObj( hbitmap );
 728
 729     return lines;
 730 }
 731
 732
 733 /***********************************************************************
 734  *           CreateDIBitmap    (GDI32.@)
 735  */
 736 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
 737                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
 738                             UINT coloruse )
 739 {
 740     HBITMAP handle;
 741     BOOL fColor;
 742     DWORD width;
 743     int height;
 744     WORD bpp;
 745     WORD compr;
 746     DC *dc;
 747
 748     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
 749     if (height < 0) height = -height;
 750
 751     /* Check if we should create a monochrome or color bitmap. */
 752     /* We create a monochrome bitmap only if it has exactly 2  */
 753     /* colors, which are black followed by white, nothing else.  */
 754     /* In all other cases, we create a color bitmap.           */
 755
 756     if (bpp != 1) fColor = TRUE;
 757     else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
 758     else
 759     {
 760         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
 761         {
 762             RGBQUAD *rgb = data->bmiColors;
 763             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 764
 765             /* Check if the first color of the colormap is black */
 766             if ((col == RGB(0,0,0)))
 767             {
 768                 rgb++;
 769                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 770                 /* If the second color is white, create a monochrome bitmap */
 771                 fColor =  (col != RGB(0xff,0xff,0xff));
 772             }
 773             /* Note : If the first color of the colormap is white
 774                followed by black, we have to create a color bitmap.
 775                If we don't the white will be displayed in black later on!*/
 776             else fColor = TRUE;
 777         }
 778         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
 779         {
 780             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
 781             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 782             if ((col == RGB(0,0,0)))
 783             {
 784                 rgb++;
 785                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
 786                 fColor = (col != RGB(0xff,0xff,0xff));
 787             }
 788             else fColor = TRUE;
 789         }
 790         else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
 791         { /* FIXME: correct ? */
 792             RGBQUAD *rgb = data->bmiColors;
 793             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 794
 795             /* Check if the first color of the colormap is black */
 796             if ((col == RGB(0,0,0)))
 797             {
 798                 rgb++;
 799                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
 800                 /* If the second color is white, create a monochrome bitmap */
 801                 fColor =  (col != RGB(0xff,0xff,0xff));
 802             }
 803             /* Note : If the first color of the colormap is white
 804                followed by black, we have to create a color bitmap.
 805                If we don't the white will be displayed in black later on!*/
 806             else fColor = TRUE;
 807         }
 808         else
 809         {
 810             ERR("(%ld): wrong/unknown size for data\n",
 811                      data->bmiHeader.biSize );
 812             return 0;
 813         }
 814     }
 815
 816     /* Now create the bitmap */
 817
 818     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 819
 820     if (fColor)
 821         handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
 822                                GetDeviceCaps( hdc, BITSPIXEL ), NULL );
 823     else handle = CreateBitmap( width, height, 1, 1, NULL );
 824
 825     if (handle)
 826     {
 827         if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
 828         else if (!BITMAP_SetOwnerDC( handle, dc ))
 829         {
 830             DeleteObject( handle );
 831             handle = 0;
 832         }
 833     }
 834
 835     GDI_ReleaseObj( hdc );
 836     return handle;
 837 }
 838
 839 /***********************************************************************
 840  *           CreateDIBSection    (GDI.489)
 841  */
 842 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
 843                                      SEGPTR *bits16, HANDLE section, DWORD offset)
 844 {
 845     LPVOID bits32;
 846     HBITMAP hbitmap;
 847
 848     hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
 849     if (hbitmap)
 850     {
 851         BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
 852         if (bmp && bmp->dib && bits32)
 853         {
 854             BITMAPINFOHEADER *bi = &bmi->bmiHeader;
 855             INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
 856             INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
 857             INT size  = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
 858                          bi->biSizeImage : width_bytes * height;
 859
 860             /* calculate number of sel's needed for size with 64K steps */
 861             WORD count = (size + 0xffff) / 0x10000;
 862             WORD sel = AllocSelectorArray16(count);
 863             int i;
 864
 865             for (i = 0; i < count; i++)
 866             {
 867                 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
 868                 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
 869                 size -= 0x10000;
 870             }
 871             bmp->segptr_bits = MAKESEGPTR( sel, 0 );
 872             if (bits16) *bits16 = bmp->segptr_bits;
 873         }
 874         if (bmp) GDI_ReleaseObj( hbitmap );
 875     }
 876     return HBITMAP_16(hbitmap);
 877 }
 878
 879 /***********************************************************************
 880  *           DIB_CreateDIBSection
 881  */
 882 HBITMAP DIB_CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 883                              LPVOID *bits, HANDLE section,
 884                              DWORD offset, DWORD ovr_pitch)
 885 {
 886     HBITMAP hbitmap = 0;
 887     DC *dc;
 888     BOOL bDesktopDC = FALSE;
 889
 890     /* If the reference hdc is null, take the desktop dc */
 891     if (hdc == 0)
 892     {
 893         hdc = CreateCompatibleDC(0);
 894         bDesktopDC = TRUE;
 895     }
 896
 897     /* Windows ignores the supplied values of biClrUsed and biClrImportant thus: */
 898     if (bmi->bmiHeader.biBitCount >= 1 && bmi->bmiHeader.biBitCount <= 8)
 899         bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 1L << bmi->bmiHeader.biBitCount;
 900     else
 901         bmi->bmiHeader.biClrUsed = bmi->bmiHeader.biClrImportant = 0;
 902
 903     if ((dc = DC_GetDCPtr( hdc )))
 904     {
 905         if(dc->funcs->pCreateDIBSection)
 906             hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
 907         GDI_ReleaseObj(hdc);
 908     }
 909
 910     if (bDesktopDC)
 911       DeleteDC(hdc);
 912
 913     return hbitmap;
 914 }
 915
 916 /***********************************************************************
 917  *           CreateDIBSection    (GDI32.@)
 918  */
 919 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
 920                                 LPVOID *bits, HANDLE section,
 921                                 DWORD offset)
 922 {
 923     return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);
 924 }
 925
 926 /***********************************************************************
 927  *           DIB_CreateDIBFromBitmap
 928  *  Allocates a packed DIB and copies the bitmap data into it.
 929  */
 930 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
 931 {
 932     BITMAPOBJ *pBmp = NULL;
 933     HGLOBAL hPackedDIB = 0;
 934     LPBYTE pPackedDIB = NULL;
 935     LPBITMAPINFOHEADER pbmiHeader = NULL;
 936     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
 937                  OffsetBits = 0, nLinesCopied = 0;
 938
 939     /* Get a pointer to the BITMAPOBJ structure */
 940     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
 941     if (!pBmp) return hPackedDIB;
 942
 943     /* Get the bitmap dimensions */
 944     width = pBmp->bitmap.bmWidth;
 945     height = pBmp->bitmap.bmHeight;
 946     depth = pBmp->bitmap.bmBitsPixel;
 947
 948     /*
 949      * A packed DIB contains a BITMAPINFO structure followed immediately by
 950      * an optional color palette and the pixel data.
 951      */
 952
 953     /* Calculate the size of the packed DIB */
 954     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
 955     cPackedSize = sizeof(BITMAPINFOHEADER)
 956                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
 957                   + cDataSize;
 958     /* Get the offset to the bits */
 959     OffsetBits = cPackedSize - cDataSize;
 960
 961     /* Allocate the packed DIB */
 962     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
 963     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
 964                              cPackedSize );
 965     if ( !hPackedDIB )
 966     {
 967         WARN("Could not allocate packed DIB!\n");
 968         goto END;
 969     }
 970
 971     /* A packed DIB starts with a BITMAPINFOHEADER */
 972     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
 973     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
 974
 975     /* Init the BITMAPINFOHEADER */
 976     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
 977     pbmiHeader->biWidth = width;
 978     pbmiHeader->biHeight = height;
 979     pbmiHeader->biPlanes = 1;
 980     pbmiHeader->biBitCount = depth;
 981     pbmiHeader->biCompression = BI_RGB;
 982     pbmiHeader->biSizeImage = 0;
 983     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
 984     pbmiHeader->biClrUsed = 0;
 985     pbmiHeader->biClrImportant = 0;
 986
 987     /* Retrieve the DIB bits from the bitmap and fill in the
 988      * DIB color table if present */
 989
 990     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
 991                              hBmp,                      /* Handle to bitmap */
 992                              0,                         /* First scan line to set in dest bitmap */
 993                              height,                    /* Number of scan lines to copy */
 994                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
 995                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
 996                              0);                        /* RGB or palette index */
 997     GlobalUnlock(hPackedDIB);
 998
 999     /* Cleanup if GetDIBits failed */
1000     if (nLinesCopied != height)
1001     {
1002         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1003         GlobalFree(hPackedDIB);
1004         hPackedDIB = 0;
1005     }
1006
1007 END:
1008     GDI_ReleaseObj( hBmp );
1009     return hPackedDIB;
1010 }