Fixed CDROM_Audio_Seek for non-linux systems.
[wine] / objects / dib.c
1 /*
2  * GDI device-independent bitmaps
3  *
4  * Copyright 1993,1994  Alexandre Julliard
5  *
6  */
7
8 #include "winbase.h"
9 #include "bitmap.h"
10 #include "callback.h"
11 #include "dc.h"
12 #include "debugtools.h"
13 #include "monitor.h"
14 #include "palette.h"
15
16 DEFAULT_DEBUG_CHANNEL(bitmap)
17
18 /***********************************************************************
19  *           DIB_GetDIBWidthBytes
20  *
21  * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
22  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
23  */
24 int DIB_GetDIBWidthBytes( int width, int depth )
25 {
26     int words;
27
28     switch(depth)
29     {
30         case 1:  words = (width + 31) / 32; break;
31         case 4:  words = (width + 7) / 8; break;
32         case 8:  words = (width + 3) / 4; break;
33         case 15:
34         case 16: words = (width + 1) / 2; break;
35         case 24: words = (width * 3 + 3)/4; break;
36
37         default:
38             WARN("(%d): Unsupported depth\n", depth );
39         /* fall through */
40         case 32:
41                 words = width;
42     }
43     return 4 * words;
44 }
45
46 /***********************************************************************
47  *           DIB_GetDIBImageBytes
48  *
49  * Return the number of bytes used to hold the image in a DIB bitmap.
50  */
51 int DIB_GetDIBImageBytes( int width, int height, int depth )
52 {
53     return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
54 }
55
56
57 /***********************************************************************
58  *           DIB_BitmapInfoSize
59  *
60  * Return the size of the bitmap info structure including color table.
61  */
62 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
63 {
64     int colors;
65
66     if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
67     {
68         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
69         colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
70         return sizeof(BITMAPCOREHEADER) + colors *
71              ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
72     }
73     else  /* assume BITMAPINFOHEADER */
74     {
75         colors = info->bmiHeader.biClrUsed;
76         if (!colors && (info->bmiHeader.biBitCount <= 8))
77             colors = 1 << info->bmiHeader.biBitCount;
78         return sizeof(BITMAPINFOHEADER) + colors *
79                ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
80     }
81 }
82
83
84 /***********************************************************************
85  *           DIB_GetBitmapInfo
86  *
87  * Get the info from a bitmap header.
88  * Return 1 for INFOHEADER, 0 for COREHEADER, -1 for error.
89  */
90 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
91                               int *height, WORD *bpp, WORD *compr )
92 {
93     if (header->biSize == sizeof(BITMAPINFOHEADER))
94     {
95         *width  = header->biWidth;
96         *height = header->biHeight;
97         *bpp    = header->biBitCount;
98         *compr  = header->biCompression;
99         return 1;
100     }
101     if (header->biSize == sizeof(BITMAPCOREHEADER))
102     {
103         BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
104         *width  = core->bcWidth;
105         *height = core->bcHeight;
106         *bpp    = core->bcBitCount;
107         *compr  = 0;
108         return 0;
109     }
110     WARN("(%ld): wrong size for header\n", header->biSize );
111     return -1;
112 }
113
114
115 /***********************************************************************
116  *           StretchDIBits16   (GDI.439)
117  */
118 INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
119                        INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
120                        INT16 heightSrc, const VOID *bits,
121                        const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
122 {
123     return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
124                                    xSrc, ySrc, widthSrc, heightSrc, bits,
125                                    info, wUsage, dwRop );
126 }
127
128
129 /***********************************************************************
130  *           StretchDIBits32   (GDI32.351)
131  */
132 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
133                        INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
134                        INT heightSrc, const void *bits,
135                        const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
136 {
137     DC *dc = DC_GetDCPtr( hdc );
138     if(!dc) return FALSE;
139
140     if(dc->funcs->pStretchDIBits)
141            return dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst, 
142                                             heightDst, xSrc, ySrc, widthSrc,
143                                             heightSrc, bits, info, wUsage,
144                                             dwRop);
145     else { /* use StretchBlt32 */
146         HBITMAP hBitmap, hOldBitmap;
147         HDC hdcMem;
148
149         hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
150                                     bits, info, wUsage );
151         hdcMem = CreateCompatibleDC( hdc );
152         hOldBitmap = SelectObject( hdcMem, hBitmap );
153         /* Origin for DIBitmap may be bottom left (positive biHeight) or top
154            left (negative biHeight) */
155         StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
156                       hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc, 
157                       widthSrc, heightSrc, dwRop );
158         SelectObject( hdcMem, hOldBitmap );
159         DeleteDC( hdcMem );
160         DeleteObject( hBitmap );
161         return heightSrc;
162     }
163 }
164
165
166 /***********************************************************************
167  *           SetDIBits16    (GDI.440)
168  */
169 INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
170                           UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
171                           UINT16 coloruse )
172 {
173     return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
174 }
175
176
177 /******************************************************************************
178  * SetDIBits32 [GDI32.312]  Sets pixels in a bitmap using colors from DIB
179  *
180  * PARAMS
181  *    hdc       [I] Handle to device context
182  *    hbitmap   [I] Handle to bitmap
183  *    startscan [I] Starting scan line
184  *    lines     [I] Number of scan lines
185  *    bits      [I] Array of bitmap bits
186  *    info      [I] Address of structure with data
187  *    coloruse  [I] Type of color indexes to use
188  *
189  * RETURNS
190  *    Success: Number of scan lines copied
191  *    Failure: 0
192  */
193 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
194                       UINT lines, LPCVOID bits, const BITMAPINFO *info,
195                       UINT coloruse )
196 {
197     DC *dc;
198     BITMAPOBJ *bitmap;
199     INT result;
200
201     /* Check parameters */
202     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
203     if (!dc) 
204     {
205         dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
206         if (!dc) return 0;
207     }
208
209     if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
210     {
211         GDI_HEAP_UNLOCK( hdc );
212         return 0;
213     }
214
215     result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan, 
216                                        lines, bits, info, 
217                                        coloruse, hbitmap);
218
219     GDI_HEAP_UNLOCK( hdc );
220     GDI_HEAP_UNLOCK( hbitmap );
221
222     return result;
223 }
224
225
226 /***********************************************************************
227  *           SetDIBitsToDevice16    (GDI.443)
228  */
229 INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
230                            INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
231                            UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
232                            UINT16 coloruse )
233 {
234     return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
235                                 startscan, lines, bits, info, coloruse );
236 }
237
238
239 /***********************************************************************
240  *           SetDIBitsToDevice32   (GDI32.313)
241  */
242 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
243                            DWORD cy, INT xSrc, INT ySrc, UINT startscan,
244                            UINT lines, LPCVOID bits, const BITMAPINFO *info,
245                            UINT coloruse )
246 {
247     INT ret;
248     DC *dc;
249
250     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
251
252     if(dc->funcs->pSetDIBitsToDevice)
253         ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
254                                              ySrc, startscan, lines, bits,
255                                              info, coloruse );
256     else {
257         FIXME("unimplemented on hdc %08x\n", hdc);
258         ret = 0;
259     }
260
261     GDI_HEAP_UNLOCK( hdc );
262     return ret;
263 }
264
265 /***********************************************************************
266  *           SetDIBColorTable16    (GDI.602)
267  */
268 UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
269                                   RGBQUAD *colors )
270 {
271     return SetDIBColorTable( hdc, startpos, entries, colors );
272 }
273
274 /***********************************************************************
275  *           SetDIBColorTable32    (GDI32.311)
276  */
277 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
278                                   RGBQUAD *colors )
279 {
280     DC * dc;
281     PALETTEENTRY * palEntry;
282     PALETTEOBJ * palette;
283     RGBQUAD *end;
284
285     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
286     if (!dc) 
287     {
288         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
289         if (!dc) return 0;
290     }
291
292     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
293     {
294         return 0;
295     }
296
297     /* Transfer color info */
298     
299     if (dc->w.bitsPerPixel <= 8) {
300         palEntry = palette->logpalette.palPalEntry + startpos;
301         if (startpos + entries > (1 << dc->w.bitsPerPixel))
302             entries = (1 << dc->w.bitsPerPixel) - startpos;
303
304         if (startpos + entries > palette->logpalette.palNumEntries)
305             entries = palette->logpalette.palNumEntries - startpos;
306
307         for (end = colors + entries; colors < end; palEntry++, colors++)
308         {
309             palEntry->peRed   = colors->rgbRed;
310             palEntry->peGreen = colors->rgbGreen;
311             palEntry->peBlue  = colors->rgbBlue;
312         }
313     } else {
314         entries = 0;
315     }
316     GDI_HEAP_UNLOCK( dc->w.hPalette );
317     return entries;
318 }
319
320 /***********************************************************************
321  *           GetDIBColorTable16    (GDI.603)
322  */
323 UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
324                                   RGBQUAD *colors )
325 {
326     return GetDIBColorTable( hdc, startpos, entries, colors );
327 }
328
329 /***********************************************************************
330  *           GetDIBColorTable32    (GDI32.169)
331  */
332 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
333                                   RGBQUAD *colors )
334 {
335     DC * dc;
336     PALETTEENTRY * palEntry;
337     PALETTEOBJ * palette;
338     RGBQUAD *end;
339
340     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
341     if (!dc) 
342     {
343         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
344         if (!dc) return 0;
345     }
346
347     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
348     {
349         return 0;
350     }
351
352     /* Transfer color info */
353     
354     if (dc->w.bitsPerPixel <= 8) {
355         palEntry = palette->logpalette.palPalEntry + startpos;
356         if (startpos + entries > (1 << dc->w.bitsPerPixel)) {
357             entries = (1 << dc->w.bitsPerPixel) - startpos;
358         }
359         for (end = colors + entries; colors < end; palEntry++, colors++)
360         {
361             colors->rgbRed      = palEntry->peRed;
362             colors->rgbGreen    = palEntry->peGreen;
363             colors->rgbBlue     = palEntry->peBlue;
364             colors->rgbReserved = 0;
365         }
366     } else {
367         entries = 0;
368     }
369     GDI_HEAP_UNLOCK( dc->w.hPalette );
370     return entries;
371 }
372
373 /* FIXME the following two structs should be combined with __sysPalTemplate in
374    objects/color.c - this should happen after de-X11-ing both of these
375    files.
376    NB. RGBQUAD and PALETTENTRY have different orderings of red, green
377    and blue - sigh */
378
379 static RGBQUAD EGAColors[16] = { 
380 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
381     { 0x00, 0x00, 0x00, 0x00 },
382     { 0x00, 0x00, 0x80, 0x00 },
383     { 0x00, 0x80, 0x00, 0x00 },
384     { 0x00, 0x80, 0x80, 0x00 },
385     { 0x80, 0x00, 0x00, 0x00 },
386     { 0x80, 0x00, 0x80, 0x00 },
387     { 0x80, 0x80, 0x00, 0x00 },
388     { 0x80, 0x80, 0x80, 0x00 },
389     { 0xc0, 0xc0, 0xc0, 0x00 },
390     { 0x00, 0x00, 0xff, 0x00 },
391     { 0x00, 0xff, 0x00, 0x00 },
392     { 0x00, 0xff, 0xff, 0x00 },
393     { 0xff, 0x00, 0x00, 0x00 },
394     { 0xff, 0x00, 0xff, 0x00 },
395     { 0xff, 0xff, 0x00, 0x00 },
396     { 0xff, 0xff, 0xff, 0x00 }
397 };
398
399
400 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
401 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
402     { 0x00, 0x00, 0x00, 0x00 },
403     { 0x00, 0x00, 0x80, 0x00 },
404     { 0x00, 0x80, 0x00, 0x00 },
405     { 0x00, 0x80, 0x80, 0x00 },
406     { 0x80, 0x00, 0x00, 0x00 },
407     { 0x80, 0x00, 0x80, 0x00 },
408     { 0x80, 0x80, 0x00, 0x00 },
409     { 0xc0, 0xc0, 0xc0, 0x00 },
410     { 0xc0, 0xdc, 0xc0, 0x00 },
411     { 0xf0, 0xca, 0xa6, 0x00 },
412     { 0xf0, 0xfb, 0xff, 0x00 },
413     { 0xa4, 0xa0, 0xa0, 0x00 },
414     { 0x80, 0x80, 0x80, 0x00 },
415     { 0x00, 0x00, 0xf0, 0x00 },
416     { 0x00, 0xff, 0x00, 0x00 },
417     { 0x00, 0xff, 0xff, 0x00 },
418     { 0xff, 0x00, 0x00, 0x00 },
419     { 0xff, 0x00, 0xff, 0x00 },
420     { 0xff, 0xff, 0x00, 0x00 },
421     { 0xff, 0xff, 0xff, 0x00 }
422 };
423
424 /***********************************************************************
425  *           GetDIBits16    (GDI.441)
426  */
427 INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
428                           UINT16 lines, LPVOID bits, BITMAPINFO * info,
429                           UINT16 coloruse )
430 {
431     return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
432 }
433
434
435 /******************************************************************************
436  * GetDIBits32 [GDI32.170]  Retrieves bits of bitmap and copies to buffer
437  *
438  * RETURNS
439  *    Success: Number of scan lines copied from bitmap
440  *    Failure: 0
441  *
442  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
443  */
444 INT WINAPI GetDIBits(
445     HDC hdc,         /* [in]  Handle to device context */
446     HBITMAP hbitmap, /* [in]  Handle to bitmap */
447     UINT startscan,  /* [in]  First scan line to set in dest bitmap */
448     UINT lines,      /* [in]  Number of scan lines to copy */
449     LPVOID bits,       /* [out] Address of array for bitmap bits */
450     BITMAPINFO * info, /* [out] Address of structure with bitmap data */
451     UINT coloruse)   /* [in]  RGB or palette index */
452 {
453     DC * dc;
454     BITMAPOBJ * bmp;
455     PALETTEENTRY * palEntry;
456     PALETTEOBJ * palette;
457     int i;
458
459     if (!info) return 0;
460     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
461     if (!dc) 
462     {
463         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
464         if (!dc) return 0;
465     }
466     if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
467     {
468         GDI_HEAP_UNLOCK( hdc );
469         return 0;
470     }
471     if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
472     {
473         GDI_HEAP_UNLOCK( hdc );
474         GDI_HEAP_UNLOCK( hbitmap );
475         return 0;
476     }
477
478     /* Transfer color info */
479
480     if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
481
482         info->bmiHeader.biClrUsed = 0;
483
484         if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
485             palEntry = palette->logpalette.palPalEntry;
486             for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
487                 if (coloruse == DIB_RGB_COLORS) {
488                     info->bmiColors[i].rgbRed      = palEntry->peRed;
489                     info->bmiColors[i].rgbGreen    = palEntry->peGreen;
490                     info->bmiColors[i].rgbBlue     = palEntry->peBlue;
491                     info->bmiColors[i].rgbReserved = 0;
492                 }
493                 else ((WORD *)info->bmiColors)[i] = (WORD)i;
494             }
495         } else {
496             switch (info->bmiHeader.biBitCount) {
497             case 1:
498                 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
499                   info->bmiColors[0].rgbBlue = 0;
500                 info->bmiColors[0].rgbReserved = 0;
501                 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
502                   info->bmiColors[1].rgbBlue = 0xff;
503                 info->bmiColors[1].rgbReserved = 0;
504                 break;
505
506             case 4:
507                 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
508                 break;
509
510             case 8:
511                 {
512                 INT r, g, b;
513                 RGBQUAD *color;
514
515                 memcpy(info->bmiColors, DefLogPalette,
516                        10 * sizeof(RGBQUAD));
517                 memcpy(info->bmiColors + 246, DefLogPalette + 10,
518                        10 * sizeof(RGBQUAD));
519                 color = info->bmiColors + 10;
520                 for(r = 0; r <= 5; r++) /* FIXME */
521                     for(g = 0; g <= 5; g++)
522                         for(b = 0; b <= 5; b++) {
523                             color->rgbRed =   (r * 0xff) / 5;
524                             color->rgbGreen = (g * 0xff) / 5;
525                             color->rgbBlue =  (b * 0xff) / 5;
526                             color->rgbReserved = 0;
527                             color++;
528                         }
529                 }
530             }
531         }
532     }
533
534     GDI_HEAP_UNLOCK( dc->w.hPalette );
535
536     if (bits && lines)
537     {
538         /* If the bitmap object already have a dib section that contains image data, get the bits from it*/
539         if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
540         {
541             /*FIXME: Only RGB dibs supported for now */
542             int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
543             int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
544             LPBYTE dbits = bits, sbits = bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
545             int x, y;
546
547             if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
548             {
549                 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
550                 dstwidthb = -dstwidthb;
551             }
552
553             switch( info->bmiHeader.biBitCount ) {
554
555             case 15:
556             case 16: /* 16 bpp dstDIB */
557                 {
558                     LPWORD dstbits = (LPWORD)dbits;
559                     WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
560
561                     /* FIXME: BI_BITFIELDS not supported yet */
562
563                     switch(bmp->dib->dsBm.bmBitsPixel) {
564
565                     case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
566                         {
567                             /* FIXME: BI_BITFIELDS not supported yet */
568                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
569                                 memcpy(dbits, sbits, srcwidthb);
570                         }
571                         break;
572
573                     case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
574                         {
575                             LPBYTE srcbits = sbits;
576
577                             for( y = 0; y < lines; y++) {
578                                 for( x = 0; x < srcwidth; x++ )
579                                     *dstbits++ = ((*srcbits++ >> 3) & bmask) |
580                                                  (((WORD)*srcbits++ << 2) & gmask) |
581                                                  (((WORD)*srcbits++ << 7) & rmask);
582                                 dstbits = (LPWORD)(dbits+=dstwidthb);
583                                 srcbits = (sbits += srcwidthb);
584                             }
585                         }
586                         break;
587
588                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
589                         {
590                             LPDWORD srcbits = (LPDWORD)sbits;
591                             DWORD val;
592
593                             for( y = 0; y < lines; y++) {
594                                 for( x = 0; x < srcwidth; x++ ) {
595                                     val = *srcbits++;
596                                     *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
597                                                        ((val >> 9) & rmask));
598                                 }
599                                 dstbits = (LPWORD)(dbits+=dstwidthb);
600                                 srcbits = (LPDWORD)(sbits+=srcwidthb);
601                             }
602                         }
603                         break;
604
605                     default: /* ? bit bmp -> 16 bit DIB */
606                         FIXME("15/16 bit DIB %d bit bitmap\n",
607                         bmp->bitmap.bmBitsPixel);
608                         break;
609                     }
610                 }
611                 break;
612
613             case 24: /* 24 bpp dstDIB */
614                 {
615                     LPBYTE dstbits = dbits;
616
617                     switch(bmp->dib->dsBm.bmBitsPixel) {
618
619                     case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
620                         {
621                             LPWORD srcbits = (LPWORD)sbits;
622                             WORD val;
623
624                             /* FIXME: BI_BITFIELDS not supported yet */
625                             for( y = 0; y < lines; y++) {
626                                 for( x = 0; x < srcwidth; x++ ) {
627                                     val = *srcbits++;
628                                     *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
629                                     *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
630                                     *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
631                                 }
632                                 dstbits = (LPBYTE)(dbits+=dstwidthb);
633                                 srcbits = (LPWORD)(sbits+=srcwidthb);
634                             }
635                         }
636                         break;
637
638                     case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
639                         {
640                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
641                                 memcpy(dbits, sbits, srcwidthb);
642                         }
643                         break;
644
645                     case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
646                         {
647                             LPBYTE srcbits = (LPBYTE)sbits;
648
649                             for( y = 0; y < lines; y++) {
650                                 for( x = 0; x < srcwidth; x++, srcbits++ ) {
651                                     *dstbits++ = *srcbits++;
652                                     *dstbits++ = *srcbits++;
653                                     *dstbits++ = *srcbits++;
654                                 }
655                                 dstbits=(LPBYTE)(dbits+=dstwidthb);
656                                 srcbits = (LPBYTE)(sbits+=srcwidthb);
657                             }
658                         }
659                         break;
660
661                     default: /* ? bit bmp -> 24 bit DIB */
662                         FIXME("24 bit DIB %d bit bitmap\n",
663                               bmp->bitmap.bmBitsPixel);
664                         break;
665                     }
666                 }
667                 break;
668
669             case 32: /* 32 bpp dstDIB */
670                 {
671                     LPDWORD dstbits = (LPDWORD)dbits;
672
673                     /* FIXME: BI_BITFIELDS not supported yet */
674
675                     switch(bmp->dib->dsBm.bmBitsPixel) {
676                         case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
677                         {
678                             LPWORD srcbits = (LPWORD)sbits;
679                             DWORD val;
680
681                             /* FIXME: BI_BITFIELDS not supported yet */
682                             for( y = 0; y < lines; y++) {
683                                 for( x = 0; x < srcwidth; x++ ) {
684                                     val = (DWORD)*srcbits++;
685                                     *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
686                                                  ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
687                                                  ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
688                                 }
689                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
690                                 srcbits=(LPWORD)(sbits+=srcwidthb);
691                             }
692                         }
693                         break;
694
695                     case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
696                         {
697                             LPBYTE srcbits = sbits;
698
699                             for( y = 0; y < lines; y++) {
700                                 for( x = 0; x < srcwidth; x++, srcbits+=3 )
701                                     *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff; 
702                                 dstbits=(LPDWORD)(dbits+=dstwidthb);
703                                 srcbits=(sbits+=srcwidthb);
704                             }
705                         }
706                         break;
707
708                     case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
709                         {
710                             /* FIXME: BI_BITFIELDS not supported yet */
711                             for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
712                                 memcpy(dbits, sbits, srcwidthb);
713                         }
714                         break;
715
716                     default: /* ? bit bmp -> 16 bit DIB */
717                         FIXME("15/16 bit DIB %d bit bitmap\n",
718                         bmp->bitmap.bmBitsPixel);
719                         break;
720                     }
721                 }
722                 break;
723
724             default: /* ? bit DIB */
725                 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
726                 break;
727             }
728         }
729         /* Otherwise, get bits from the XImage */
730         else if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
731         {
732             GDI_HEAP_UNLOCK( hdc );
733             GDI_HEAP_UNLOCK( hbitmap );
734
735             return FALSE;
736         }
737     }
738     else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) ) 
739     {
740         /* fill in struct members */
741
742         if( info->bmiHeader.biBitCount == 0)
743         {
744             info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
745             info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
746             info->bmiHeader.biPlanes = 1;
747             info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
748             info->bmiHeader.biSizeImage = 
749                              DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
750                                                    bmp->bitmap.bmHeight,
751                                                    bmp->bitmap.bmBitsPixel );
752             info->bmiHeader.biCompression = 0;
753         }
754         else
755         {
756             info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
757                                                info->bmiHeader.biWidth,
758                                                info->bmiHeader.biHeight,
759                                                info->bmiHeader.biBitCount );
760         }
761     }
762
763     TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
764           info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
765           info->bmiHeader.biHeight);
766
767     GDI_HEAP_UNLOCK( hdc );
768     GDI_HEAP_UNLOCK( hbitmap );
769
770     return lines;
771 }
772
773
774 /***********************************************************************
775  *           CreateDIBitmap16    (GDI.442)
776  */
777 HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
778                             DWORD init, LPCVOID bits, const BITMAPINFO * data,
779                             UINT16 coloruse )
780 {
781     return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
782 }
783
784
785 /***********************************************************************
786  *           CreateDIBitmap32    (GDI32.37)
787  */
788 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
789                             DWORD init, LPCVOID bits, const BITMAPINFO *data,
790                             UINT coloruse )
791 {
792     HBITMAP handle;
793     BOOL fColor;
794     DWORD width;
795     int height;
796     WORD bpp;
797     WORD compr;
798
799     if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
800     if (height < 0) height = -height;
801
802     /* Check if we should create a monochrome or color bitmap. */
803     /* We create a monochrome bitmap only if it has exactly 2  */
804     /* colors, which are black followed by white, nothing else.  */
805     /* In all other cases, we create a color bitmap.           */
806
807     if (bpp != 1) fColor = TRUE;
808     else if ((coloruse != DIB_RGB_COLORS) ||
809              (init != CBM_INIT) || !data) fColor = FALSE;
810     else
811     {
812         if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
813         {
814             RGBQUAD *rgb = data->bmiColors;
815             DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
816
817             /* Check if the first color of the colormap is black */ 
818             if ((col == RGB(0,0,0)))
819             {
820                 rgb++;
821                 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
822                 /* If the second color is white, create a monochrome bitmap */
823                 fColor =  (col != RGB(0xff,0xff,0xff));
824             }
825             /* Note : If the first color of the colormap is white 
826                followed by black, we have to create a color bitmap. 
827                If we don't the white will be displayed in black later on!*/ 
828             else fColor = TRUE;
829         }
830         else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
831         {
832             RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
833             DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
834             if ((col == RGB(0,0,0)))
835             {
836                 rgb++;
837                 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
838                 fColor = (col != RGB(0xff,0xff,0xff));
839             }
840             else fColor = TRUE;
841         }
842         else
843         {
844             WARN("(%ld): wrong size for data\n",
845                      data->bmiHeader.biSize );
846             return 0;
847         }
848     }
849
850     /* Now create the bitmap */
851
852     handle = fColor ? CreateBitmap( width, height, 1, MONITOR_GetDepth(&MONITOR_PrimaryMonitor), NULL ) :
853                       CreateBitmap( width, height, 1, 1, NULL );
854     if (!handle) return 0;
855
856     if (init == CBM_INIT)
857         SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
858     return handle;
859 }
860
861 /***********************************************************************
862  *           CreateDIBSection16    (GDI.489)
863  */
864 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
865                                      SEGPTR *bits, HANDLE section,
866                                      DWORD offset)
867 {
868     HBITMAP16 hbitmap;
869     DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
870     if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
871     if(!dc) return (HBITMAP16) NULL;
872
873     hbitmap = dc->funcs->pCreateDIBSection16(dc, bmi, usage, bits, section, offset);
874
875     GDI_HEAP_UNLOCK(hdc);
876
877     return hbitmap;
878 }
879
880 /***********************************************************************
881  *           CreateDIBSection32    (GDI32.36)
882  */
883 HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
884                                 LPVOID *bits, HANDLE section,
885                                 DWORD offset)
886 {
887     HBITMAP hbitmap;
888     DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
889     if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
890     if(!dc) return (HBITMAP) NULL;
891
892     hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset);
893
894     GDI_HEAP_UNLOCK(hdc);
895
896     return hbitmap;
897 }
898
899 /***********************************************************************
900  *           DIB_DeleteDIBSection
901  */
902 void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
903 {
904     if (bmp && bmp->dib)
905     {
906         DIBSECTION *dib = bmp->dib;
907
908         if (dib->dsBm.bmBits)
909         {
910             if (dib->dshSection)
911                 UnmapViewOfFile(dib->dsBm.bmBits);
912             else
913                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
914         }
915
916         BITMAP_Driver->pDeleteDIBSection(bmp);
917
918         HeapFree(GetProcessHeap(), 0, dib);
919         bmp->dib = NULL;
920     }
921 }
922
923 /***********************************************************************
924  *           DIB_FixColorsToLoadflags
925  *
926  * Change color table entries when LR_LOADTRANSPARENT or LR_LOADMAP3DCOLORS
927  * are in loadflags
928  */
929 void DIB_FixColorsToLoadflags(BITMAPINFO * bmi, UINT loadflags, BYTE pix)
930 {
931   int colors;
932   COLORREF c_W, c_S, c_F, c_L, c_C;
933   int incr,i;
934   RGBQUAD *ptr;
935
936   if (bmi->bmiHeader.biBitCount > 8) return;
937   if (bmi->bmiHeader.biSize == sizeof(BITMAPINFOHEADER)) incr = 4;
938   else if (bmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) incr = 3;
939   else {
940     WARN("Wrong bitmap header size!\n");
941     return;
942   }
943   colors = bmi->bmiHeader.biClrUsed;
944   if (!colors && (bmi->bmiHeader.biBitCount <= 8))
945     colors = 1 << bmi->bmiHeader.biBitCount;
946   c_W = GetSysColor(COLOR_WINDOW);
947   c_S = GetSysColor(COLOR_3DSHADOW);
948   c_F = GetSysColor(COLOR_3DFACE);
949   c_L = GetSysColor(COLOR_3DLIGHT);
950   if (loadflags & LR_LOADTRANSPARENT) {
951     switch (bmi->bmiHeader.biBitCount) {
952       case 1: pix = pix >> 7; break;
953       case 4: pix = pix >> 4; break;
954       case 8: break;
955       default: 
956         WARN("(%d): Unsupported depth\n", bmi->bmiHeader.biBitCount); 
957         return;
958     }
959     if (pix >= colors) {
960       WARN("pixel has color index greater than biClrUsed!\n");
961       return;
962     }
963     if (loadflags & LR_LOADMAP3DCOLORS) c_W = c_F;
964     ptr = (RGBQUAD*)((char*)bmi->bmiColors+pix*incr);
965     ptr->rgbBlue = GetBValue(c_W);
966     ptr->rgbGreen = GetGValue(c_W);
967     ptr->rgbRed = GetRValue(c_W);
968   }
969   if (loadflags & LR_LOADMAP3DCOLORS)
970     for (i=0; i<colors; i++) {
971       ptr = (RGBQUAD*)((char*)bmi->bmiColors+i*incr);
972       c_C = RGB(ptr->rgbRed, ptr->rgbGreen, ptr->rgbBlue);
973       if (c_C == RGB(128, 128, 128)) { 
974         ptr->rgbRed = GetRValue(c_S);
975         ptr->rgbGreen = GetGValue(c_S);
976         ptr->rgbBlue = GetBValue(c_S);
977       } else if (c_C == RGB(192, 192, 192)) { 
978         ptr->rgbRed = GetRValue(c_F);
979         ptr->rgbGreen = GetGValue(c_F);
980         ptr->rgbBlue = GetBValue(c_F);
981       } else if (c_C == RGB(223, 223, 223)) { 
982         ptr->rgbRed = GetRValue(c_L);
983         ptr->rgbGreen = GetGValue(c_L);
984         ptr->rgbBlue = GetBValue(c_L);
985       } 
986     }
987 }
988
989 /***********************************************************************
990  *           DIB_CreateDIBFromBitmap
991  *  Allocates a packed DIB and copies the bitmap data into it.
992  */
993 HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
994 {
995     BITMAPOBJ *pBmp = NULL;
996     HGLOBAL hPackedDIB = 0;
997     LPBYTE pPackedDIB = NULL;
998     LPBITMAPINFOHEADER pbmiHeader = NULL;
999     unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
1000                  OffsetBits = 0, nLinesCopied = 0;
1001
1002     /* Get a pointer to the BITMAPOBJ structure */
1003     pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
1004
1005     /* Get the bitmap dimensions */
1006     width = pBmp->bitmap.bmWidth;
1007     height = pBmp->bitmap.bmHeight;
1008     depth = pBmp->bitmap.bmBitsPixel;
1009                  
1010     /*
1011      * A packed DIB contains a BITMAPINFO structure followed immediately by
1012      * an optional color palette and the pixel data.
1013      */
1014
1015     /* Calculate the size of the packed DIB */
1016     cDataSize = DIB_GetDIBImageBytes( width, height, depth );
1017     cPackedSize = sizeof(BITMAPINFOHEADER)
1018                   + ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
1019                   + cDataSize;
1020     /* Get the offset to the bits */
1021     OffsetBits = cPackedSize - cDataSize;
1022
1023     /* Allocate the packed DIB */
1024     TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
1025     hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
1026                              cPackedSize );
1027     if ( !hPackedDIB )
1028     {
1029         WARN("Could not allocate packed DIB!\n");
1030         goto END;
1031     }
1032     
1033     /* A packed DIB starts with a BITMAPINFOHEADER */
1034     pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
1035     pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
1036
1037     /* Init the BITMAPINFOHEADER */
1038     pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
1039     pbmiHeader->biWidth = width;
1040     pbmiHeader->biHeight = height;
1041     pbmiHeader->biPlanes = 1;
1042     pbmiHeader->biBitCount = depth;
1043     pbmiHeader->biCompression = BI_RGB;
1044     pbmiHeader->biSizeImage = 0;
1045     pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
1046     pbmiHeader->biClrUsed = 0;
1047     pbmiHeader->biClrImportant = 0;
1048
1049     /* Retrieve the DIB bits from the bitmap and fill in the
1050      * DIB color table if present */
1051     
1052     nLinesCopied = GetDIBits(hdc,                       /* Handle to device context */
1053                              hBmp,                      /* Handle to bitmap */
1054                              0,                         /* First scan line to set in dest bitmap */
1055                              height,                    /* Number of scan lines to copy */
1056                              pPackedDIB + OffsetBits,   /* [out] Address of array for bitmap bits */
1057                              (LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
1058                              0);                        /* RGB or palette index */
1059     GlobalUnlock(hPackedDIB);
1060
1061     /* Cleanup if GetDIBits failed */
1062     if (nLinesCopied != height)
1063     {
1064         TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
1065         GlobalFree(hPackedDIB);
1066         hPackedDIB = 0;
1067     }
1068
1069 END:
1070     return hPackedDIB;
1071 }