2 * GDI device-independent bitmaps
4 * Copyright 1993,1994 Alexandre Julliard
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.
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.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 Important information:
24 * Current Windows versions support two different DIB structures:
26 - BITMAPCOREINFO / BITMAPCOREHEADER (legacy structures; used in OS/2)
27 - BITMAPINFO / BITMAPINFOHEADER
29 Most Windows API functions taking a BITMAPINFO* / BITMAPINFOHEADER* also
30 accept the old "core" structures, and so must WINE.
31 You can distinguish them by looking at the first member (bcSize/biSize),
32 or use the internal function DIB_GetBitmapInfo.
35 * The palettes are stored in different formats:
37 - BITMAPCOREINFO: Array of RGBTRIPLE
38 - BITMAPINFO: Array of RGBQUAD
41 * There are even more DIB headers, but they all extend BITMAPINFOHEADER:
43 - BITMAPV4HEADER: Introduced in Windows 95 / NT 4.0
44 - BITMAPV5HEADER: Introduced in Windows 98 / 2000
46 If biCompression is BI_BITFIELDS, the color masks are at the same position
47 in all the headers (they start at bmiColors of BITMAPINFOHEADER), because
48 the new headers have structure members for the masks.
51 * You should never access the color table using the bmiColors member,
52 because the passed structure may have one of the extended headers
53 mentioned above. Use this to calculate the location:
56 void* colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize;
60 Search for "Bitmap Structures" in MSDN
70 #include "gdi_private.h"
71 #include "wine/debug.h"
73 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
77 Some of the following helper functions are duplicated in
81 /***********************************************************************
82 * DIB_GetDIBWidthBytes
84 * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
86 int DIB_GetDIBWidthBytes( int width, int depth )
92 case 1: words = (width + 31) / 32; break;
93 case 4: words = (width + 7) / 8; break;
94 case 8: words = (width + 3) / 4; break;
96 case 16: words = (width + 1) / 2; break;
97 case 24: words = (width * 3 + 3)/4; break;
100 WARN("(%d): Unsupported depth\n", depth );
108 /***********************************************************************
109 * DIB_GetDIBImageBytes
111 * Return the number of bytes used to hold the image in a DIB bitmap.
113 int DIB_GetDIBImageBytes( int width, int height, int depth )
115 return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
119 /***********************************************************************
122 * Return the size of the bitmap info structure including color table.
124 int bitmap_info_size( const BITMAPINFO * info, WORD coloruse )
126 int colors, masks = 0;
128 if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
130 const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)info;
131 colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
132 return sizeof(BITMAPCOREHEADER) + colors *
133 ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
135 else /* assume BITMAPINFOHEADER */
137 colors = info->bmiHeader.biClrUsed;
138 if (colors > 256) colors = 256;
139 if (!colors && (info->bmiHeader.biBitCount <= 8))
140 colors = 1 << info->bmiHeader.biBitCount;
141 if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3;
142 return sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) + colors *
143 ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
148 /***********************************************************************
151 * Get the info from a bitmap header.
152 * Return 0 for COREHEADER, 1 for INFOHEADER, -1 for error.
154 int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width,
155 LONG *height, WORD *planes, WORD *bpp, DWORD *compr, DWORD *size )
157 if (header->biSize == sizeof(BITMAPCOREHEADER))
159 const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)header;
160 *width = core->bcWidth;
161 *height = core->bcHeight;
162 *planes = core->bcPlanes;
163 *bpp = core->bcBitCount;
168 if (header->biSize >= sizeof(BITMAPINFOHEADER)) /* assume BITMAPINFOHEADER */
170 *width = header->biWidth;
171 *height = header->biHeight;
172 *planes = header->biPlanes;
173 *bpp = header->biBitCount;
174 *compr = header->biCompression;
175 *size = header->biSizeImage;
178 ERR("(%d): unknown/wrong size for header\n", header->biSize );
183 /***********************************************************************
184 * StretchDIBits (GDI32.@)
186 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
187 INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
188 INT heightSrc, const void *bits,
189 const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
197 if (!(dc = get_dc_ptr( hdc ))) return 0;
199 if(dc->funcs->pStretchDIBits)
202 ret = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
203 heightDst, xSrc, ySrc, widthSrc,
204 heightSrc, bits, info, wUsage, dwRop);
205 release_dc_ptr( dc );
207 else /* use StretchBlt */
214 BOOL fastpath = FALSE;
216 release_dc_ptr( dc );
218 if (DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size ) == -1)
220 ERR("Invalid bitmap\n");
226 ERR("Bitmap has a negative width\n");
230 hBitmap = GetCurrentObject(hdc, OBJ_BITMAP);
232 if (xDst == 0 && yDst == 0 && xSrc == 0 && ySrc == 0 &&
233 widthDst == widthSrc && heightDst == heightSrc &&
234 info->bmiHeader.biCompression == BI_RGB &&
238 if ((bmp = GDI_GetObjPtr( hBitmap, OBJ_BITMAP )))
240 if (bmp->bitmap.bmBitsPixel == bpp &&
241 bmp->bitmap.bmWidth == widthSrc &&
242 bmp->bitmap.bmHeight == heightSrc &&
243 bmp->bitmap.bmPlanes == planes)
245 GDI_ReleaseObj( hBitmap );
252 TRACE("using fast path\n");
253 ret = SetDIBits( hdc, hBitmap, 0, height, bits, info, wUsage);
257 /* slow path - need to use StretchBlt */
259 HPALETTE hpal = NULL;
262 hdcMem = CreateCompatibleDC( hdc );
263 hBitmap = CreateCompatibleBitmap(hdc, width, height);
264 hOldBitmap = SelectObject( hdcMem, hBitmap );
265 if(wUsage == DIB_PAL_COLORS)
267 hpal = GetCurrentObject(hdc, OBJ_PAL);
268 hpal = SelectPalette(hdcMem, hpal, FALSE);
271 if (info->bmiHeader.biCompression == BI_RLE4 ||
272 info->bmiHeader.biCompression == BI_RLE8) {
274 /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
275 * contain all the rectangle described in bmiHeader, but only part of it.
276 * This mean that those undescribed pixels must be left untouched.
277 * So, we first copy on a memory bitmap the current content of the
278 * destination rectangle, blit the DIB bits on top of it - hence leaving
279 * the gaps untouched -, and blitting the rectangle back.
280 * This insure that gaps are untouched on the destination rectangle
281 * Not doing so leads to trashed images (the gaps contain what was on the
282 * memory bitmap => generally black or garbage)
283 * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
284 * another speed vs correctness issue. Anyway, if speed is needed, then the
285 * pStretchDIBits function shall be implemented.
289 /* copy existing bitmap from destination dc */
290 StretchBlt( hdcMem, xSrc, abs(height) - heightSrc - ySrc,
291 widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
295 ret = SetDIBits(hdcMem, hBitmap, 0, height, bits, info, wUsage);
297 /* Origin for DIBitmap may be bottom left (positive biHeight) or top
298 left (negative biHeight) */
299 if (ret) StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
300 hdcMem, xSrc, abs(height) - heightSrc - ySrc,
301 widthSrc, heightSrc, dwRop );
303 SelectPalette(hdcMem, hpal, FALSE);
304 SelectObject( hdcMem, hOldBitmap );
306 DeleteObject( hBitmap );
313 /******************************************************************************
314 * SetDIBits [GDI32.@]
316 * Sets pixels in a bitmap using colors from DIB.
319 * hdc [I] Handle to device context
320 * hbitmap [I] Handle to bitmap
321 * startscan [I] Starting scan line
322 * lines [I] Number of scan lines
323 * bits [I] Array of bitmap bits
324 * info [I] Address of structure with data
325 * coloruse [I] Type of color indexes to use
328 * Success: Number of scan lines copied
331 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
332 UINT lines, LPCVOID bits, const BITMAPINFO *info,
339 if (coloruse == DIB_RGB_COLORS) hdc = CreateCompatibleDC(0);
341 if (!(dc = get_dc_ptr( hdc )))
346 if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP )))
348 release_dc_ptr( dc );
349 if (coloruse == DIB_RGB_COLORS) DeleteDC(hdc);
353 if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
358 if (bitmap->funcs != dc->funcs)
359 ERR( "not supported: DDB bitmap %p not belonging to device %p\n", hbitmap, hdc );
360 else if (dc->funcs->pSetDIBits)
361 result = dc->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
362 bits, info, coloruse );
366 GDI_ReleaseObj( hbitmap );
367 release_dc_ptr( dc );
368 if (coloruse == DIB_RGB_COLORS) DeleteDC(hdc);
373 /***********************************************************************
374 * SetDIBitsToDevice (GDI32.@)
376 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
377 DWORD cy, INT xSrc, INT ySrc, UINT startscan,
378 UINT lines, LPCVOID bits, const BITMAPINFO *info,
386 if (!(dc = get_dc_ptr( hdc ))) return 0;
388 if(dc->funcs->pSetDIBitsToDevice)
391 ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
392 ySrc, startscan, lines, bits,
396 FIXME("unimplemented on hdc %p\n", hdc);
400 release_dc_ptr( dc );
404 /***********************************************************************
405 * SetDIBColorTable (GDI32.@)
407 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, CONST RGBQUAD *colors )
413 if (!(dc = get_dc_ptr( hdc ))) return 0;
415 if ((bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP )))
417 /* Check if currently selected bitmap is a DIB */
418 if (bitmap->color_table)
420 if (startpos < bitmap->nb_colors)
422 if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos;
423 memcpy(bitmap->color_table + startpos, colors, entries * sizeof(RGBQUAD));
427 GDI_ReleaseObj( dc->hBitmap );
430 if (dc->funcs->pSetDIBColorTable)
431 dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
433 release_dc_ptr( dc );
438 /***********************************************************************
439 * GetDIBColorTable (GDI32.@)
441 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
446 if (!(dc = get_dc_ptr( hdc ))) return 0;
448 if (dc->funcs->pGetDIBColorTable)
449 result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
452 BITMAPOBJ *bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP );
455 /* Check if currently selected bitmap is a DIB */
456 if (bitmap->color_table)
458 if (startpos < bitmap->nb_colors)
460 if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos;
461 memcpy(colors, bitmap->color_table + startpos, entries * sizeof(RGBQUAD));
465 GDI_ReleaseObj( dc->hBitmap );
468 release_dc_ptr( dc );
472 /* FIXME the following two structs should be combined with __sysPalTemplate in
473 objects/color.c - this should happen after de-X11-ing both of these
475 NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
478 static const RGBQUAD EGAColorsQuads[16] = {
479 /* rgbBlue, rgbGreen, rgbRed, rgbReserved */
480 { 0x00, 0x00, 0x00, 0x00 },
481 { 0x00, 0x00, 0x80, 0x00 },
482 { 0x00, 0x80, 0x00, 0x00 },
483 { 0x00, 0x80, 0x80, 0x00 },
484 { 0x80, 0x00, 0x00, 0x00 },
485 { 0x80, 0x00, 0x80, 0x00 },
486 { 0x80, 0x80, 0x00, 0x00 },
487 { 0x80, 0x80, 0x80, 0x00 },
488 { 0xc0, 0xc0, 0xc0, 0x00 },
489 { 0x00, 0x00, 0xff, 0x00 },
490 { 0x00, 0xff, 0x00, 0x00 },
491 { 0x00, 0xff, 0xff, 0x00 },
492 { 0xff, 0x00, 0x00, 0x00 },
493 { 0xff, 0x00, 0xff, 0x00 },
494 { 0xff, 0xff, 0x00, 0x00 },
495 { 0xff, 0xff, 0xff, 0x00 }
498 static const RGBTRIPLE EGAColorsTriples[16] = {
499 /* rgbBlue, rgbGreen, rgbRed */
500 { 0x00, 0x00, 0x00 },
501 { 0x00, 0x00, 0x80 },
502 { 0x00, 0x80, 0x00 },
503 { 0x00, 0x80, 0x80 },
504 { 0x80, 0x00, 0x00 },
505 { 0x80, 0x00, 0x80 },
506 { 0x80, 0x80, 0x00 },
507 { 0x80, 0x80, 0x80 },
508 { 0xc0, 0xc0, 0xc0 },
509 { 0x00, 0x00, 0xff },
510 { 0x00, 0xff, 0x00 },
511 { 0x00, 0xff, 0xff },
512 { 0xff, 0x00, 0x00 } ,
513 { 0xff, 0x00, 0xff },
514 { 0xff, 0xff, 0x00 },
518 static const RGBQUAD DefLogPaletteQuads[20] = { /* Copy of Default Logical Palette */
519 /* rgbBlue, rgbGreen, rgbRed, rgbReserved */
520 { 0x00, 0x00, 0x00, 0x00 },
521 { 0x00, 0x00, 0x80, 0x00 },
522 { 0x00, 0x80, 0x00, 0x00 },
523 { 0x00, 0x80, 0x80, 0x00 },
524 { 0x80, 0x00, 0x00, 0x00 },
525 { 0x80, 0x00, 0x80, 0x00 },
526 { 0x80, 0x80, 0x00, 0x00 },
527 { 0xc0, 0xc0, 0xc0, 0x00 },
528 { 0xc0, 0xdc, 0xc0, 0x00 },
529 { 0xf0, 0xca, 0xa6, 0x00 },
530 { 0xf0, 0xfb, 0xff, 0x00 },
531 { 0xa4, 0xa0, 0xa0, 0x00 },
532 { 0x80, 0x80, 0x80, 0x00 },
533 { 0x00, 0x00, 0xf0, 0x00 },
534 { 0x00, 0xff, 0x00, 0x00 },
535 { 0x00, 0xff, 0xff, 0x00 },
536 { 0xff, 0x00, 0x00, 0x00 },
537 { 0xff, 0x00, 0xff, 0x00 },
538 { 0xff, 0xff, 0x00, 0x00 },
539 { 0xff, 0xff, 0xff, 0x00 }
542 static const RGBTRIPLE DefLogPaletteTriples[20] = { /* Copy of Default Logical Palette */
543 /* rgbBlue, rgbGreen, rgbRed */
544 { 0x00, 0x00, 0x00 },
545 { 0x00, 0x00, 0x80 },
546 { 0x00, 0x80, 0x00 },
547 { 0x00, 0x80, 0x80 },
548 { 0x80, 0x00, 0x00 },
549 { 0x80, 0x00, 0x80 },
550 { 0x80, 0x80, 0x00 },
551 { 0xc0, 0xc0, 0xc0 },
552 { 0xc0, 0xdc, 0xc0 },
553 { 0xf0, 0xca, 0xa6 },
554 { 0xf0, 0xfb, 0xff },
555 { 0xa4, 0xa0, 0xa0 },
556 { 0x80, 0x80, 0x80 },
557 { 0x00, 0x00, 0xf0 },
558 { 0x00, 0xff, 0x00 },
559 { 0x00, 0xff, 0xff },
560 { 0xff, 0x00, 0x00 },
561 { 0xff, 0x00, 0xff },
562 { 0xff, 0xff, 0x00 },
567 /******************************************************************************
568 * GetDIBits [GDI32.@]
570 * Retrieves bits of bitmap and copies to buffer.
573 * Success: Number of scan lines copied from bitmap
576 INT WINAPI GetDIBits(
577 HDC hdc, /* [in] Handle to device context */
578 HBITMAP hbitmap, /* [in] Handle to bitmap */
579 UINT startscan, /* [in] First scan line to set in dest bitmap */
580 UINT lines, /* [in] Number of scan lines to copy */
581 LPVOID bits, /* [out] Address of array for bitmap bits */
582 BITMAPINFO * info, /* [out] Address of structure with bitmap data */
583 UINT coloruse) /* [in] RGB or palette index */
595 RGBTRIPLE* rgbTriples;
600 bitmap_type = DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size);
601 if (bitmap_type == -1)
603 ERR("Invalid bitmap format\n");
606 core_header = (bitmap_type == 0);
607 if (!(dc = get_dc_ptr( hdc )))
609 SetLastError( ERROR_INVALID_PARAMETER );
613 if (!(bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP )))
615 release_dc_ptr( dc );
619 colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize;
620 rgbTriples = colorPtr;
623 /* Transfer color info */
627 case 0: /* query bitmap info only */
630 BITMAPCOREHEADER* coreheader = (BITMAPCOREHEADER*) info;
631 coreheader->bcWidth = bmp->bitmap.bmWidth;
632 coreheader->bcHeight = bmp->bitmap.bmHeight;
633 coreheader->bcPlanes = 1;
634 coreheader->bcBitCount = bmp->bitmap.bmBitsPixel;
638 info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
639 info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
640 info->bmiHeader.biPlanes = 1;
641 info->bmiHeader.biSizeImage =
642 DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
643 bmp->bitmap.bmHeight,
644 bmp->bitmap.bmBitsPixel );
645 info->bmiHeader.biCompression = (bmp->bitmap.bmBitsPixel > 8) ? BI_BITFIELDS : BI_RGB;
646 switch(bmp->bitmap.bmBitsPixel)
649 info->bmiHeader.biBitCount = 16;
652 info->bmiHeader.biBitCount = 32;
655 info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
658 info->bmiHeader.biXPelsPerMeter = 0;
659 info->bmiHeader.biYPelsPerMeter = 0;
660 info->bmiHeader.biClrUsed = 0;
661 info->bmiHeader.biClrImportant = 0;
663 /* Windows 2000 doesn't touch the additional struct members if
664 it's a BITMAPV4HEADER or a BITMAPV5HEADER */
666 lines = abs(bmp->bitmap.bmHeight);
672 if (!core_header) info->bmiHeader.biClrUsed = 0;
674 /* If the bitmap object already has a dib section at the
675 same color depth then get the color map from it */
676 if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == bpp) {
677 if(coloruse == DIB_RGB_COLORS) {
678 unsigned int colors = min( bmp->nb_colors, 1 << bpp );
682 /* Convert the color table (RGBQUAD to RGBTRIPLE) */
683 RGBTRIPLE* index = rgbTriples;
685 for (i=0; i < colors; i++, index++)
687 index->rgbtRed = bmp->color_table[i].rgbRed;
688 index->rgbtGreen = bmp->color_table[i].rgbGreen;
689 index->rgbtBlue = bmp->color_table[i].rgbBlue;
694 if (colors != 1 << bpp) info->bmiHeader.biClrUsed = colors;
695 memcpy(colorPtr, bmp->color_table, colors * sizeof(RGBQUAD));
699 WORD *index = colorPtr;
700 for(i = 0; i < 1 << info->bmiHeader.biBitCount; i++, index++)
705 if (coloruse == DIB_PAL_COLORS) {
706 for (i = 0; i < (1 << bpp); i++)
707 ((WORD *)colorPtr)[i] = (WORD)i;
709 else if(bpp > 1 && bpp == bmp->bitmap.bmBitsPixel) {
710 /* For color DDBs in native depth (mono DDBs always have
711 a black/white palette):
712 Generate the color map from the selected palette */
713 PALETTEENTRY palEntry[256];
715 memset( palEntry, 0, sizeof(palEntry) );
716 if (!GetPaletteEntries( dc->hPalette, 0, 1 << bmp->bitmap.bmBitsPixel, palEntry ))
718 release_dc_ptr( dc );
719 GDI_ReleaseObj( hbitmap );
722 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++) {
725 rgbTriples[i].rgbtRed = palEntry[i].peRed;
726 rgbTriples[i].rgbtGreen = palEntry[i].peGreen;
727 rgbTriples[i].rgbtBlue = palEntry[i].peBlue;
731 rgbQuads[i].rgbRed = palEntry[i].peRed;
732 rgbQuads[i].rgbGreen = palEntry[i].peGreen;
733 rgbQuads[i].rgbBlue = palEntry[i].peBlue;
734 rgbQuads[i].rgbReserved = 0;
742 rgbTriples[0].rgbtRed = rgbTriples[0].rgbtGreen =
743 rgbTriples[0].rgbtBlue = 0;
744 rgbTriples[1].rgbtRed = rgbTriples[1].rgbtGreen =
745 rgbTriples[1].rgbtBlue = 0xff;
749 rgbQuads[0].rgbRed = rgbQuads[0].rgbGreen =
750 rgbQuads[0].rgbBlue = 0;
751 rgbQuads[0].rgbReserved = 0;
752 rgbQuads[1].rgbRed = rgbQuads[1].rgbGreen =
753 rgbQuads[1].rgbBlue = 0xff;
754 rgbQuads[1].rgbReserved = 0;
760 memcpy(colorPtr, EGAColorsTriples, sizeof(EGAColorsTriples));
762 memcpy(colorPtr, EGAColorsQuads, sizeof(EGAColorsQuads));
773 memcpy(rgbTriples, DefLogPaletteTriples,
774 10 * sizeof(RGBTRIPLE));
775 memcpy(rgbTriples + 246, DefLogPaletteTriples + 10,
776 10 * sizeof(RGBTRIPLE));
777 color = rgbTriples + 10;
778 for(r = 0; r <= 5; r++) /* FIXME */
779 for(g = 0; g <= 5; g++)
780 for(b = 0; b <= 5; b++) {
781 color->rgbtRed = (r * 0xff) / 5;
782 color->rgbtGreen = (g * 0xff) / 5;
783 color->rgbtBlue = (b * 0xff) / 5;
792 memcpy(rgbQuads, DefLogPaletteQuads,
793 10 * sizeof(RGBQUAD));
794 memcpy(rgbQuads + 246, DefLogPaletteQuads + 10,
795 10 * sizeof(RGBQUAD));
796 color = rgbQuads + 10;
797 for(r = 0; r <= 5; r++) /* FIXME */
798 for(g = 0; g <= 5; g++)
799 for(b = 0; b <= 5; b++) {
800 color->rgbRed = (r * 0xff) / 5;
801 color->rgbGreen = (g * 0xff) / 5;
802 color->rgbBlue = (b * 0xff) / 5;
803 color->rgbReserved = 0;
814 if (info->bmiHeader.biCompression == BI_BITFIELDS)
816 ((PDWORD)info->bmiColors)[0] = 0x7c00;
817 ((PDWORD)info->bmiColors)[1] = 0x03e0;
818 ((PDWORD)info->bmiColors)[2] = 0x001f;
823 if (info->bmiHeader.biCompression == BI_BITFIELDS)
825 ((PDWORD)info->bmiColors)[0] = 0xf800;
826 ((PDWORD)info->bmiColors)[1] = 0x07e0;
827 ((PDWORD)info->bmiColors)[2] = 0x001f;
833 if (info->bmiHeader.biCompression == BI_BITFIELDS)
835 ((PDWORD)info->bmiColors)[0] = 0xff0000;
836 ((PDWORD)info->bmiColors)[1] = 0x00ff00;
837 ((PDWORD)info->bmiColors)[2] = 0x0000ff;
844 /* If the bitmap object already have a dib section that contains image data, get the bits from it */
845 if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && bpp >= 15)
847 /*FIXME: Only RGB dibs supported for now */
848 unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
849 unsigned int dstwidth = width;
850 int dstwidthb = DIB_GetDIBWidthBytes( width, bpp );
851 LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
852 unsigned int x, y, width, widthb;
854 if ((height < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
856 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
857 dstwidthb = -dstwidthb;
863 case 16: /* 16 bpp dstDIB */
865 LPWORD dstbits = (LPWORD)dbits;
866 WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
868 /* FIXME: BI_BITFIELDS not supported yet */
870 switch(bmp->dib->dsBm.bmBitsPixel) {
872 case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
874 widthb = min(srcwidthb, abs(dstwidthb));
875 /* FIXME: BI_BITFIELDS not supported yet */
876 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
877 memcpy(dbits, sbits, widthb);
881 case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
883 LPBYTE srcbits = sbits;
885 width = min(srcwidth, dstwidth);
886 for( y = 0; y < lines; y++) {
887 for( x = 0; x < width; x++, srcbits += 3)
888 *dstbits++ = ((srcbits[0] >> 3) & bmask) |
889 (((WORD)srcbits[1] << 2) & gmask) |
890 (((WORD)srcbits[2] << 7) & rmask);
892 dstbits = (LPWORD)(dbits+=dstwidthb);
893 srcbits = (sbits += srcwidthb);
898 case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
900 LPDWORD srcbits = (LPDWORD)sbits;
903 width = min(srcwidth, dstwidth);
904 for( y = 0; y < lines; y++) {
905 for( x = 0; x < width; x++ ) {
907 *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
908 ((val >> 9) & rmask));
910 dstbits = (LPWORD)(dbits+=dstwidthb);
911 srcbits = (LPDWORD)(sbits+=srcwidthb);
916 default: /* ? bit bmp -> 16 bit DIB */
917 FIXME("15/16 bit DIB %d bit bitmap\n",
918 bmp->bitmap.bmBitsPixel);
924 case 24: /* 24 bpp dstDIB */
926 LPBYTE dstbits = dbits;
928 switch(bmp->dib->dsBm.bmBitsPixel) {
930 case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
932 LPWORD srcbits = (LPWORD)sbits;
935 width = min(srcwidth, dstwidth);
936 /* FIXME: BI_BITFIELDS not supported yet */
937 for( y = 0; y < lines; y++) {
938 for( x = 0; x < width; x++ ) {
940 *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
941 *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
942 *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
944 dstbits = dbits+=dstwidthb;
945 srcbits = (LPWORD)(sbits+=srcwidthb);
950 case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
952 widthb = min(srcwidthb, abs(dstwidthb));
953 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
954 memcpy(dbits, sbits, widthb);
958 case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
960 LPBYTE srcbits = sbits;
962 width = min(srcwidth, dstwidth);
963 for( y = 0; y < lines; y++) {
964 for( x = 0; x < width; x++, srcbits++ ) {
965 *dstbits++ = *srcbits++;
966 *dstbits++ = *srcbits++;
967 *dstbits++ = *srcbits++;
969 dstbits = dbits+=dstwidthb;
970 srcbits = sbits+=srcwidthb;
975 default: /* ? bit bmp -> 24 bit DIB */
976 FIXME("24 bit DIB %d bit bitmap\n",
977 bmp->bitmap.bmBitsPixel);
983 case 32: /* 32 bpp dstDIB */
985 LPDWORD dstbits = (LPDWORD)dbits;
987 /* FIXME: BI_BITFIELDS not supported yet */
989 switch(bmp->dib->dsBm.bmBitsPixel) {
990 case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
992 LPWORD srcbits = (LPWORD)sbits;
995 width = min(srcwidth, dstwidth);
996 /* FIXME: BI_BITFIELDS not supported yet */
997 for( y = 0; y < lines; y++) {
998 for( x = 0; x < width; x++ ) {
999 val = (DWORD)*srcbits++;
1000 *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
1001 ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
1002 ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
1004 dstbits=(LPDWORD)(dbits+=dstwidthb);
1005 srcbits=(LPWORD)(sbits+=srcwidthb);
1010 case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
1012 LPBYTE srcbits = sbits;
1014 width = min(srcwidth, dstwidth);
1015 for( y = 0; y < lines; y++) {
1016 for( x = 0; x < width; x++, srcbits+=3 )
1017 *dstbits++ = srcbits[0] |
1020 dstbits=(LPDWORD)(dbits+=dstwidthb);
1021 srcbits=(sbits+=srcwidthb);
1026 case 32: /* 32 bpp srcDIB -> 32 bpp dstDIB */
1028 widthb = min(srcwidthb, abs(dstwidthb));
1029 /* FIXME: BI_BITFIELDS not supported yet */
1030 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) {
1031 memcpy(dbits, sbits, widthb);
1036 default: /* ? bit bmp -> 32 bit DIB */
1037 FIXME("32 bit DIB %d bit bitmap\n",
1038 bmp->bitmap.bmBitsPixel);
1044 default: /* ? bit DIB */
1045 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
1049 /* Otherwise, get bits from the XImage */
1052 if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
1055 if (bmp->funcs && bmp->funcs->pGetDIBits)
1056 lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
1057 lines, bits, info, coloruse );
1059 lines = 0; /* FIXME: should copy from bmp->bitmap.bmBits */
1063 else lines = abs(height);
1065 /* The knowledge base article Q81498 ("DIBs and Their Uses") states that
1066 if bits == NULL and bpp != 0, only biSizeImage and the color table are
1070 /* FIXME: biSizeImage should be calculated according to the selected
1071 compression algorithm if biCompression != BI_RGB */
1072 info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( width, height, bpp );
1073 TRACE("biSizeImage = %d, ", info->bmiHeader.biSizeImage);
1075 TRACE("biWidth = %d, biHeight = %d\n", width, height);
1078 release_dc_ptr( dc );
1079 GDI_ReleaseObj( hbitmap );
1084 /***********************************************************************
1085 * CreateDIBitmap (GDI32.@)
1087 * Creates a DDB (device dependent bitmap) from a DIB.
1088 * The DDB will have the same color depth as the reference DC.
1090 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
1091 DWORD init, LPCVOID bits, const BITMAPINFO *data,
1101 if (!header) return 0;
1103 if (DIB_GetBitmapInfo( header, &width, &height, &planes, &bpp, &compr, &size ) == -1) return 0;
1107 TRACE("Bitmap has a negative width\n");
1111 /* Top-down DIBs have a negative height */
1112 if (height < 0) height = -height;
1114 TRACE("hdc=%p, header=%p, init=%u, bits=%p, data=%p, coloruse=%u (bitmap: width=%d, height=%d, bpp=%u, compr=%u)\n",
1115 hdc, header, init, bits, data, coloruse, width, height, bpp, compr);
1118 handle = CreateBitmap( width, height, 1, 1, NULL );
1120 handle = CreateCompatibleBitmap( hdc, width, height );
1124 if (init & CBM_INIT)
1126 if (SetDIBits( hdc, handle, 0, height, bits, data, coloruse ) == 0)
1128 DeleteObject( handle );
1133 else if (hdc && ((dc = get_dc_ptr( hdc )) != NULL) )
1135 if (!BITMAP_SetOwnerDC( handle, dc ))
1137 DeleteObject( handle );
1140 release_dc_ptr( dc );
1147 /* Copy/synthesize RGB palette from BITMAPINFO. Ripped from dlls/winex11.drv/dib.c */
1148 static void DIB_CopyColorTable( DC *dc, BITMAPOBJ *bmp, WORD coloruse, const BITMAPINFO *info )
1150 RGBQUAD *colorTable;
1151 unsigned int colors, i;
1152 BOOL core_info = info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER);
1156 colors = 1 << ((const BITMAPCOREINFO*) info)->bmciHeader.bcBitCount;
1160 colors = info->bmiHeader.biClrUsed;
1161 if (!colors) colors = 1 << info->bmiHeader.biBitCount;
1165 ERR("called with >256 colors!\n");
1169 if (!(colorTable = HeapAlloc(GetProcessHeap(), 0, colors * sizeof(RGBQUAD) ))) return;
1171 if(coloruse == DIB_RGB_COLORS)
1175 /* Convert RGBTRIPLEs to RGBQUADs */
1176 for (i=0; i < colors; i++)
1178 colorTable[i].rgbRed = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtRed;
1179 colorTable[i].rgbGreen = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtGreen;
1180 colorTable[i].rgbBlue = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtBlue;
1181 colorTable[i].rgbReserved = 0;
1186 memcpy(colorTable, (const BYTE*) info + (WORD) info->bmiHeader.biSize, colors * sizeof(RGBQUAD));
1191 PALETTEENTRY entries[256];
1192 const WORD *index = (const WORD*) ((const BYTE*) info + (WORD) info->bmiHeader.biSize);
1193 UINT count = GetPaletteEntries( dc->hPalette, 0, colors, entries );
1195 for (i = 0; i < colors; i++, index++)
1197 PALETTEENTRY *entry = &entries[*index % count];
1198 colorTable[i].rgbRed = entry->peRed;
1199 colorTable[i].rgbGreen = entry->peGreen;
1200 colorTable[i].rgbBlue = entry->peBlue;
1201 colorTable[i].rgbReserved = 0;
1204 bmp->color_table = colorTable;
1205 bmp->nb_colors = colors;
1208 /***********************************************************************
1209 * CreateDIBSection (GDI32.@)
1211 HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
1212 VOID **bits, HANDLE section, DWORD offset)
1216 BOOL bDesktopDC = FALSE;
1222 DWORD compression, sizeImage;
1223 void *mapBits = NULL;
1226 if(bits) *bits = NULL;
1230 if (((bitmap_type = DIB_GetBitmapInfo( &bmi->bmiHeader, &width, &height,
1231 &planes, &bpp, &compression, &sizeImage )) == -1))
1234 if (compression != BI_RGB && compression != BI_BITFIELDS)
1236 TRACE("can't create a compressed (%u) dibsection\n", compression);
1240 if (!(dib = HeapAlloc( GetProcessHeap(), 0, sizeof(*dib) ))) return 0;
1242 TRACE("format (%d,%d), planes %d, bpp %d, size %d, %s\n",
1243 width, height, planes, bpp, sizeImage, usage == DIB_PAL_COLORS? "PAL" : "RGB");
1245 dib->dsBm.bmType = 0;
1246 dib->dsBm.bmWidth = width;
1247 dib->dsBm.bmHeight = height >= 0 ? height : -height;
1248 dib->dsBm.bmWidthBytes = DIB_GetDIBWidthBytes(width, bpp);
1249 dib->dsBm.bmPlanes = planes;
1250 dib->dsBm.bmBitsPixel = bpp;
1251 dib->dsBm.bmBits = NULL;
1253 if (!bitmap_type) /* core header */
1255 /* convert the BITMAPCOREHEADER to a BITMAPINFOHEADER */
1256 dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
1257 dib->dsBmih.biWidth = width;
1258 dib->dsBmih.biHeight = height;
1259 dib->dsBmih.biPlanes = planes;
1260 dib->dsBmih.biBitCount = bpp;
1261 dib->dsBmih.biCompression = compression;
1262 dib->dsBmih.biXPelsPerMeter = 0;
1263 dib->dsBmih.biYPelsPerMeter = 0;
1264 dib->dsBmih.biClrUsed = 0;
1265 dib->dsBmih.biClrImportant = 0;
1269 /* truncate extended bitmap headers (BITMAPV4HEADER etc.) */
1270 dib->dsBmih = bmi->bmiHeader;
1271 dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
1274 /* set number of entries in bmi.bmiColors table */
1276 dib->dsBmih.biClrUsed = 1 << bpp;
1278 dib->dsBmih.biSizeImage = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
1280 /* set dsBitfields values */
1281 if (usage == DIB_PAL_COLORS || bpp <= 8)
1283 dib->dsBitfields[0] = dib->dsBitfields[1] = dib->dsBitfields[2] = 0;
1289 dib->dsBitfields[0] = (compression == BI_BITFIELDS) ? *(const DWORD *)bmi->bmiColors : 0x7c00;
1290 dib->dsBitfields[1] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 1) : 0x03e0;
1291 dib->dsBitfields[2] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 2) : 0x001f;
1295 dib->dsBitfields[0] = (compression == BI_BITFIELDS) ? *(const DWORD *)bmi->bmiColors : 0xff0000;
1296 dib->dsBitfields[1] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 1) : 0x00ff00;
1297 dib->dsBitfields[2] = (compression == BI_BITFIELDS) ? *((const DWORD *)bmi->bmiColors + 2) : 0x0000ff;
1301 /* get storage location for DIB bits */
1305 SYSTEM_INFO SystemInfo;
1309 GetSystemInfo( &SystemInfo );
1310 mapOffset = offset - (offset % SystemInfo.dwAllocationGranularity);
1311 mapSize = dib->dsBmih.biSizeImage + (offset - mapOffset);
1312 mapBits = MapViewOfFile( section, FILE_MAP_ALL_ACCESS, 0, mapOffset, mapSize );
1313 if (mapBits) dib->dsBm.bmBits = (char *)mapBits + (offset - mapOffset);
1318 dib->dsBm.bmBits = VirtualAlloc( NULL, dib->dsBmih.biSizeImage,
1319 MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE );
1321 dib->dshSection = section;
1322 dib->dsOffset = offset;
1324 if (!dib->dsBm.bmBits)
1326 HeapFree( GetProcessHeap(), 0, dib );
1330 /* If the reference hdc is null, take the desktop dc */
1333 hdc = CreateCompatibleDC(0);
1337 if (!(dc = get_dc_ptr( hdc ))) goto error;
1339 /* create Device Dependent Bitmap and add DIB pointer */
1340 ret = CreateBitmap( dib->dsBm.bmWidth, dib->dsBm.bmHeight, 1,
1341 (bpp == 1) ? 1 : GetDeviceCaps(hdc, BITSPIXEL), NULL );
1343 if (ret && ((bmp = GDI_GetObjPtr(ret, OBJ_BITMAP))))
1346 bmp->funcs = dc->funcs;
1347 /* create local copy of DIB palette */
1348 if (bpp <= 8) DIB_CopyColorTable( dc, bmp, usage, bmi );
1349 GDI_ReleaseObj( ret );
1351 if (dc->funcs->pCreateDIBSection)
1353 if (!dc->funcs->pCreateDIBSection(dc->physDev, ret, bmi, usage))
1355 DeleteObject( ret );
1361 release_dc_ptr( dc );
1362 if (bDesktopDC) DeleteDC( hdc );
1363 if (ret && bits) *bits = dib->dsBm.bmBits;
1367 if (bDesktopDC) DeleteDC( hdc );
1368 if (section) UnmapViewOfFile( mapBits );
1369 else if (!offset) VirtualFree( dib->dsBm.bmBits, 0, MEM_RELEASE );
1370 HeapFree( GetProcessHeap(), 0, dib );