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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "gdi_private.h"
30 #include "wine/debug.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
34 /***********************************************************************
35 * DIB_GetDIBWidthBytes
37 * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
38 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp
40 int DIB_GetDIBWidthBytes( int width, int depth )
46 case 1: words = (width + 31) / 32; break;
47 case 4: words = (width + 7) / 8; break;
48 case 8: words = (width + 3) / 4; break;
50 case 16: words = (width + 1) / 2; break;
51 case 24: words = (width * 3 + 3)/4; break;
54 WARN("(%d): Unsupported depth\n", depth );
62 /***********************************************************************
63 * DIB_GetDIBImageBytes
65 * Return the number of bytes used to hold the image in a DIB bitmap.
67 int DIB_GetDIBImageBytes( int width, int height, int depth )
69 return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
73 /***********************************************************************
76 * Return the size of the bitmap info structure including color table.
78 int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
82 if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
84 BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)info;
85 colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
86 return sizeof(BITMAPCOREHEADER) + colors *
87 ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
89 else /* assume BITMAPINFOHEADER */
91 colors = info->bmiHeader.biClrUsed;
92 if (!colors && (info->bmiHeader.biBitCount <= 8))
93 colors = 1 << info->bmiHeader.biBitCount;
94 return sizeof(BITMAPINFOHEADER) + colors *
95 ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
100 /***********************************************************************
103 * Get the info from a bitmap header.
104 * Return 1 for INFOHEADER, 0 for COREHEADER,
105 * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
107 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
108 int *height, WORD *bpp, WORD *compr )
110 if (header->biSize == sizeof(BITMAPINFOHEADER))
112 *width = header->biWidth;
113 *height = header->biHeight;
114 *bpp = header->biBitCount;
115 *compr = header->biCompression;
118 if (header->biSize == sizeof(BITMAPCOREHEADER))
120 BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
121 *width = core->bcWidth;
122 *height = core->bcHeight;
123 *bpp = core->bcBitCount;
127 if (header->biSize == sizeof(BITMAPV4HEADER))
129 BITMAPV4HEADER *v4hdr = (BITMAPV4HEADER *)header;
130 *width = v4hdr->bV4Width;
131 *height = v4hdr->bV4Height;
132 *bpp = v4hdr->bV4BitCount;
133 *compr = v4hdr->bV4V4Compression;
136 if (header->biSize == sizeof(BITMAPV5HEADER))
138 BITMAPV5HEADER *v5hdr = (BITMAPV5HEADER *)header;
139 *width = v5hdr->bV5Width;
140 *height = v5hdr->bV5Height;
141 *bpp = v5hdr->bV5BitCount;
142 *compr = v5hdr->bV5Compression;
145 ERR("(%ld): unknown/wrong size for header\n", header->biSize );
150 /***********************************************************************
151 * StretchDIBits (GDI32.@)
153 INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
154 INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
155 INT heightSrc, const void *bits,
156 const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
163 dc = DC_GetDCUpdate( hdc );
164 if(!dc) return FALSE;
166 if(dc->funcs->pStretchDIBits)
168 heightSrc = dc->funcs->pStretchDIBits(dc->physDev, xDst, yDst, widthDst,
169 heightDst, xSrc, ySrc, widthSrc,
170 heightSrc, bits, info, wUsage, dwRop);
171 GDI_ReleaseObj( hdc );
173 else /* use StretchBlt */
175 HBITMAP hBitmap, hOldBitmap;
176 HPALETTE hpal = NULL;
179 GDI_ReleaseObj( hdc );
180 hdcMem = CreateCompatibleDC( hdc );
181 hBitmap = CreateCompatibleBitmap(hdc, info->bmiHeader.biWidth,
182 info->bmiHeader.biHeight);
183 hOldBitmap = SelectObject( hdcMem, hBitmap );
184 if(wUsage == DIB_PAL_COLORS)
186 hpal = GetCurrentObject(hdc, OBJ_PAL);
187 hpal = SelectPalette(hdcMem, hpal, FALSE);
190 if (info->bmiHeader.biCompression == BI_RLE4 ||
191 info->bmiHeader.biCompression == BI_RLE8) {
193 /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
194 * contain all the rectangle described in bmiHeader, but only part of it.
195 * This mean that those undescribed pixels must be left untouched.
196 * So, we first copy on a memory bitmap the current content of the
197 * destination rectangle, blit the DIB bits on top of it - hence leaving
198 * the gaps untouched -, and blitting the rectangle back.
199 * This insure that gaps are untouched on the destination rectangle
200 * Not doing so leads to trashed images (the gaps contain what was on the
201 * memory bitmap => generally black or garbage)
202 * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
203 * another speed vs correctness issue. Anyway, if speed is needed, then the
204 * pStretchDIBits function shall be implemented.
208 /* copy existing bitmap from destination dc */
209 StretchBlt( hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
210 widthSrc, heightSrc, hdc, xDst, yDst, widthDst, heightDst,
214 SetDIBits(hdcMem, hBitmap, 0, info->bmiHeader.biHeight, bits,
217 /* Origin for DIBitmap may be bottom left (positive biHeight) or top
218 left (negative biHeight) */
219 StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
220 hdcMem, xSrc, abs(info->bmiHeader.biHeight) - heightSrc - ySrc,
221 widthSrc, heightSrc, dwRop );
223 SelectPalette(hdcMem, hpal, FALSE);
224 SelectObject( hdcMem, hOldBitmap );
226 DeleteObject( hBitmap );
232 /******************************************************************************
233 * SetDIBits [GDI32.@]
235 * Sets pixels in a bitmap using colors from DIB.
238 * hdc [I] Handle to device context
239 * hbitmap [I] Handle to bitmap
240 * startscan [I] Starting scan line
241 * lines [I] Number of scan lines
242 * bits [I] Array of bitmap bits
243 * info [I] Address of structure with data
244 * coloruse [I] Type of color indexes to use
247 * Success: Number of scan lines copied
250 INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
251 UINT lines, LPCVOID bits, const BITMAPINFO *info,
258 if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return 0;
260 if (!(dc = DC_GetDCUpdate( hdc )))
262 if (coloruse == DIB_RGB_COLORS) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
263 GDI_ReleaseObj( hbitmap );
267 if (!bitmap->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) goto done;
269 if (bitmap->funcs && bitmap->funcs->pSetDIBits)
270 result = bitmap->funcs->pSetDIBits( dc->physDev, hbitmap, startscan, lines,
271 bits, info, coloruse );
276 GDI_ReleaseObj( hdc );
277 GDI_ReleaseObj( hbitmap );
282 /***********************************************************************
283 * SetDIBitsToDevice (GDI32.@)
285 INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
286 DWORD cy, INT xSrc, INT ySrc, UINT startscan,
287 UINT lines, LPCVOID bits, const BITMAPINFO *info,
293 if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
295 if(dc->funcs->pSetDIBitsToDevice)
296 ret = dc->funcs->pSetDIBitsToDevice( dc->physDev, xDest, yDest, cx, cy, xSrc,
297 ySrc, startscan, lines, bits,
300 FIXME("unimplemented on hdc %p\n", hdc);
304 GDI_ReleaseObj( hdc );
308 /***********************************************************************
309 * SetDIBColorTable (GDI32.@)
311 UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
316 if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
318 if (dc->funcs->pSetDIBColorTable)
319 result = dc->funcs->pSetDIBColorTable(dc->physDev, startpos, entries, colors);
321 GDI_ReleaseObj( hdc );
326 /***********************************************************************
327 * GetDIBColorTable (GDI32.@)
329 UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
334 if (!(dc = DC_GetDCUpdate( hdc ))) return 0;
336 if (dc->funcs->pGetDIBColorTable)
337 result = dc->funcs->pGetDIBColorTable(dc->physDev, startpos, entries, colors);
339 GDI_ReleaseObj( hdc );
343 /* FIXME the following two structs should be combined with __sysPalTemplate in
344 objects/color.c - this should happen after de-X11-ing both of these
346 NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
349 static RGBQUAD EGAColors[16] = {
350 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
351 { 0x00, 0x00, 0x00, 0x00 },
352 { 0x00, 0x00, 0x80, 0x00 },
353 { 0x00, 0x80, 0x00, 0x00 },
354 { 0x00, 0x80, 0x80, 0x00 },
355 { 0x80, 0x00, 0x00, 0x00 },
356 { 0x80, 0x00, 0x80, 0x00 },
357 { 0x80, 0x80, 0x00, 0x00 },
358 { 0x80, 0x80, 0x80, 0x00 },
359 { 0xc0, 0xc0, 0xc0, 0x00 },
360 { 0x00, 0x00, 0xff, 0x00 },
361 { 0x00, 0xff, 0x00, 0x00 },
362 { 0x00, 0xff, 0xff, 0x00 },
363 { 0xff, 0x00, 0x00, 0x00 },
364 { 0xff, 0x00, 0xff, 0x00 },
365 { 0xff, 0xff, 0x00, 0x00 },
366 { 0xff, 0xff, 0xff, 0x00 }
370 static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
371 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
372 { 0x00, 0x00, 0x00, 0x00 },
373 { 0x00, 0x00, 0x80, 0x00 },
374 { 0x00, 0x80, 0x00, 0x00 },
375 { 0x00, 0x80, 0x80, 0x00 },
376 { 0x80, 0x00, 0x00, 0x00 },
377 { 0x80, 0x00, 0x80, 0x00 },
378 { 0x80, 0x80, 0x00, 0x00 },
379 { 0xc0, 0xc0, 0xc0, 0x00 },
380 { 0xc0, 0xdc, 0xc0, 0x00 },
381 { 0xf0, 0xca, 0xa6, 0x00 },
382 { 0xf0, 0xfb, 0xff, 0x00 },
383 { 0xa4, 0xa0, 0xa0, 0x00 },
384 { 0x80, 0x80, 0x80, 0x00 },
385 { 0x00, 0x00, 0xf0, 0x00 },
386 { 0x00, 0xff, 0x00, 0x00 },
387 { 0x00, 0xff, 0xff, 0x00 },
388 { 0xff, 0x00, 0x00, 0x00 },
389 { 0xff, 0x00, 0xff, 0x00 },
390 { 0xff, 0xff, 0x00, 0x00 },
391 { 0xff, 0xff, 0xff, 0x00 }
395 /******************************************************************************
396 * GetDIBits [GDI32.@]
398 * Retrieves bits of bitmap and copies to buffer.
401 * Success: Number of scan lines copied from bitmap
404 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_87eb.asp
406 INT WINAPI GetDIBits(
407 HDC hdc, /* [in] Handle to device context */
408 HBITMAP hbitmap, /* [in] Handle to bitmap */
409 UINT startscan, /* [in] First scan line to set in dest bitmap */
410 UINT lines, /* [in] Number of scan lines to copy */
411 LPVOID bits, /* [out] Address of array for bitmap bits */
412 BITMAPINFO * info, /* [out] Address of structure with bitmap data */
413 UINT coloruse) /* [in] RGB or palette index */
421 memdc = CreateCompatibleDC(hdc);
422 if (!(dc = DC_GetDCUpdate( hdc )))
427 if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
429 GDI_ReleaseObj( hdc );
434 /* Transfer color info */
436 if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
438 info->bmiHeader.biClrUsed = 0;
440 /* If the bitmap object already has a dib section at the
441 same color depth then get the color map from it */
442 if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == info->bmiHeader.biBitCount) {
443 if(coloruse == DIB_RGB_COLORS) {
445 oldbm = SelectObject(memdc, hbitmap);
446 GetDIBColorTable(memdc, 0, 1 << info->bmiHeader.biBitCount, info->bmiColors);
447 SelectObject(memdc, oldbm);
450 WORD *index = (WORD*)info->bmiColors;
452 for(i = 0; i < 1 << info->bmiHeader.biBitCount; i++, index++)
457 if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
458 /* Generate the color map from the selected palette */
459 PALETTEENTRY * palEntry;
460 PALETTEOBJ * palette;
461 if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC ))) {
462 GDI_ReleaseObj( hdc );
463 GDI_ReleaseObj( hbitmap );
467 palEntry = palette->logpalette.palPalEntry;
468 for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
469 if (coloruse == DIB_RGB_COLORS) {
470 info->bmiColors[i].rgbRed = palEntry->peRed;
471 info->bmiColors[i].rgbGreen = palEntry->peGreen;
472 info->bmiColors[i].rgbBlue = palEntry->peBlue;
473 info->bmiColors[i].rgbReserved = 0;
475 else ((WORD *)info->bmiColors)[i] = (WORD)i;
477 GDI_ReleaseObj( dc->hPalette );
479 switch (info->bmiHeader.biBitCount) {
481 info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
482 info->bmiColors[0].rgbBlue = 0;
483 info->bmiColors[0].rgbReserved = 0;
484 info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
485 info->bmiColors[1].rgbBlue = 0xff;
486 info->bmiColors[1].rgbReserved = 0;
490 memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
498 memcpy(info->bmiColors, DefLogPalette,
499 10 * sizeof(RGBQUAD));
500 memcpy(info->bmiColors + 246, DefLogPalette + 10,
501 10 * sizeof(RGBQUAD));
502 color = info->bmiColors + 10;
503 for(r = 0; r <= 5; r++) /* FIXME */
504 for(g = 0; g <= 5; g++)
505 for(b = 0; b <= 5; b++) {
506 color->rgbRed = (r * 0xff) / 5;
507 color->rgbGreen = (g * 0xff) / 5;
508 color->rgbBlue = (b * 0xff) / 5;
509 color->rgbReserved = 0;
520 /* If the bitmap object already have a dib section that contains image data, get the bits from it */
521 if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
523 /*FIXME: Only RGB dibs supported for now */
524 unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
525 int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
526 LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
529 if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
531 dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
532 dstwidthb = -dstwidthb;
535 switch( info->bmiHeader.biBitCount ) {
538 case 16: /* 16 bpp dstDIB */
540 LPWORD dstbits = (LPWORD)dbits;
541 WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
543 /* FIXME: BI_BITFIELDS not supported yet */
545 switch(bmp->dib->dsBm.bmBitsPixel) {
547 case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
549 /* FIXME: BI_BITFIELDS not supported yet */
550 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
551 memcpy(dbits, sbits, srcwidthb);
555 case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
557 LPBYTE srcbits = sbits;
559 for( y = 0; y < lines; y++) {
560 for( x = 0; x < srcwidth; x++, srcbits += 3)
561 *dstbits++ = ((srcbits[0] >> 3) & bmask) |
562 (((WORD)srcbits[1] << 2) & gmask) |
563 (((WORD)srcbits[2] << 7) & rmask);
565 dstbits = (LPWORD)(dbits+=dstwidthb);
566 srcbits = (sbits += srcwidthb);
571 case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
573 LPDWORD srcbits = (LPDWORD)sbits;
576 for( y = 0; y < lines; y++) {
577 for( x = 0; x < srcwidth; x++ ) {
579 *dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
580 ((val >> 9) & rmask));
582 dstbits = (LPWORD)(dbits+=dstwidthb);
583 srcbits = (LPDWORD)(sbits+=srcwidthb);
588 default: /* ? bit bmp -> 16 bit DIB */
589 FIXME("15/16 bit DIB %d bit bitmap\n",
590 bmp->bitmap.bmBitsPixel);
596 case 24: /* 24 bpp dstDIB */
598 LPBYTE dstbits = dbits;
600 switch(bmp->dib->dsBm.bmBitsPixel) {
602 case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
604 LPWORD srcbits = (LPWORD)sbits;
607 /* FIXME: BI_BITFIELDS not supported yet */
608 for( y = 0; y < lines; y++) {
609 for( x = 0; x < srcwidth; x++ ) {
611 *dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
612 *dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
613 *dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
615 dstbits = (LPBYTE)(dbits+=dstwidthb);
616 srcbits = (LPWORD)(sbits+=srcwidthb);
621 case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
623 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
624 memcpy(dbits, sbits, srcwidthb);
628 case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
630 LPBYTE srcbits = (LPBYTE)sbits;
632 for( y = 0; y < lines; y++) {
633 for( x = 0; x < srcwidth; x++, srcbits++ ) {
634 *dstbits++ = *srcbits++;
635 *dstbits++ = *srcbits++;
636 *dstbits++ = *srcbits++;
638 dstbits=(LPBYTE)(dbits+=dstwidthb);
639 srcbits = (LPBYTE)(sbits+=srcwidthb);
644 default: /* ? bit bmp -> 24 bit DIB */
645 FIXME("24 bit DIB %d bit bitmap\n",
646 bmp->bitmap.bmBitsPixel);
652 case 32: /* 32 bpp dstDIB */
654 LPDWORD dstbits = (LPDWORD)dbits;
656 /* FIXME: BI_BITFIELDS not supported yet */
658 switch(bmp->dib->dsBm.bmBitsPixel) {
659 case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
661 LPWORD srcbits = (LPWORD)sbits;
664 /* FIXME: BI_BITFIELDS not supported yet */
665 for( y = 0; y < lines; y++) {
666 for( x = 0; x < srcwidth; x++ ) {
667 val = (DWORD)*srcbits++;
668 *dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
669 ((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
670 ((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
672 dstbits=(LPDWORD)(dbits+=dstwidthb);
673 srcbits=(LPWORD)(sbits+=srcwidthb);
678 case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
680 LPBYTE srcbits = sbits;
682 for( y = 0; y < lines; y++) {
683 for( x = 0; x < srcwidth; x++, srcbits+=3 )
684 *dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
685 dstbits=(LPDWORD)(dbits+=dstwidthb);
686 srcbits=(sbits+=srcwidthb);
691 case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
693 /* FIXME: BI_BITFIELDS not supported yet */
694 for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
695 memcpy(dbits, sbits, srcwidthb);
699 default: /* ? bit bmp -> 32 bit DIB */
700 FIXME("32 bit DIB %d bit bitmap\n",
701 bmp->bitmap.bmBitsPixel);
707 default: /* ? bit DIB */
708 FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
712 /* Otherwise, get bits from the XImage */
715 if (!bmp->funcs && !BITMAP_SetOwnerDC( hbitmap, dc )) lines = 0;
718 if (bmp->funcs && bmp->funcs->pGetDIBits)
719 lines = bmp->funcs->pGetDIBits( dc->physDev, hbitmap, startscan,
720 lines, bits, info, coloruse );
722 lines = 0; /* FIXME: should copy from bmp->bitmap.bmBits */
726 else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
728 /* fill in struct members */
730 if( info->bmiHeader.biBitCount == 0)
732 info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
733 info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
734 info->bmiHeader.biPlanes = 1;
735 info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
736 info->bmiHeader.biSizeImage =
737 DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
738 bmp->bitmap.bmHeight,
739 bmp->bitmap.bmBitsPixel );
740 info->bmiHeader.biCompression = 0;
744 info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
745 info->bmiHeader.biWidth,
746 info->bmiHeader.biHeight,
747 info->bmiHeader.biBitCount );
749 lines = info->bmiHeader.biHeight;
752 TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
753 info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
754 info->bmiHeader.biHeight);
756 GDI_ReleaseObj( hdc );
757 GDI_ReleaseObj( hbitmap );
763 /***********************************************************************
764 * CreateDIBitmap (GDI32.@)
766 HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
767 DWORD init, LPCVOID bits, const BITMAPINFO *data,
778 if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
779 if (height < 0) height = -height;
781 /* Check if we should create a monochrome or color bitmap. */
782 /* We create a monochrome bitmap only if it has exactly 2 */
783 /* colors, which are black followed by white, nothing else. */
784 /* In all other cases, we create a color bitmap. */
786 if (bpp != 1) fColor = TRUE;
787 else if ((coloruse != DIB_RGB_COLORS) || !data) fColor = FALSE;
790 if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
792 RGBQUAD *rgb = data->bmiColors;
793 DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
795 /* Check if the first color of the colormap is black */
796 if ((col == RGB(0,0,0)))
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));
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!*/
808 else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
810 RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
811 DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
812 if ((col == RGB(0,0,0)))
815 col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
816 fColor = (col != RGB(0xff,0xff,0xff));
820 else if (data->bmiHeader.biSize == sizeof(BITMAPV4HEADER))
821 { /* FIXME: correct ? */
822 RGBQUAD *rgb = data->bmiColors;
823 DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
825 /* Check if the first color of the colormap is black */
826 if ((col == RGB(0,0,0)))
829 col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
830 /* If the second color is white, create a monochrome bitmap */
831 fColor = (col != RGB(0xff,0xff,0xff));
833 /* Note : If the first color of the colormap is white
834 followed by black, we have to create a color bitmap.
835 If we don't the white will be displayed in black later on!*/
840 ERR("(%ld): wrong/unknown size for data\n",
841 data->bmiHeader.biSize );
846 /* Now create the bitmap */
848 if (!(dc = DC_GetDCPtr( hdc ))) return 0;
851 handle = CreateBitmap( width, height, GetDeviceCaps( hdc, PLANES ),
852 GetDeviceCaps( hdc, BITSPIXEL ), NULL );
853 else handle = CreateBitmap( width, height, 1, 1, NULL );
857 if (init == CBM_INIT) SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
858 else if (!BITMAP_SetOwnerDC( handle, dc ))
860 DeleteObject( handle );
865 GDI_ReleaseObj( hdc );
869 /***********************************************************************
870 * CreateDIBSection (GDI.489)
872 HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, const BITMAPINFO *bmi, UINT16 usage,
873 SEGPTR *bits16, HANDLE section, DWORD offset)
878 hbitmap = CreateDIBSection( HDC_32(hdc), bmi, usage, &bits32, section, offset );
881 BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr(hbitmap, BITMAP_MAGIC);
882 if (bmp && bmp->dib && bits32)
884 const BITMAPINFOHEADER *bi = &bmi->bmiHeader;
885 INT height = bi->biHeight >= 0 ? bi->biHeight : -bi->biHeight;
886 INT width_bytes = DIB_GetDIBWidthBytes(bi->biWidth, bi->biBitCount);
887 INT size = (bi->biSizeImage && bi->biCompression != BI_RGB) ?
888 bi->biSizeImage : width_bytes * height;
890 /* calculate number of sel's needed for size with 64K steps */
891 WORD count = (size + 0xffff) / 0x10000;
892 WORD sel = AllocSelectorArray16(count);
895 for (i = 0; i < count; i++)
897 SetSelectorBase(sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
898 SetSelectorLimit16(sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
901 bmp->segptr_bits = MAKESEGPTR( sel, 0 );
902 if (bits16) *bits16 = bmp->segptr_bits;
904 if (bmp) GDI_ReleaseObj( hbitmap );
906 return HBITMAP_16(hbitmap);
909 /***********************************************************************
910 * DIB_CreateDIBSection
912 HBITMAP DIB_CreateDIBSection(HDC hdc, const BITMAPINFO *bmi, UINT usage,
913 VOID **bits, HANDLE section,
914 DWORD offset, DWORD ovr_pitch)
918 BOOL bDesktopDC = FALSE;
920 /* If the reference hdc is null, take the desktop dc */
923 hdc = CreateCompatibleDC(0);
927 if ((dc = DC_GetDCPtr( hdc )))
929 if(dc->funcs->pCreateDIBSection)
930 hbitmap = dc->funcs->pCreateDIBSection(dc->physDev, bmi, usage, bits, section, offset, ovr_pitch);
940 /***********************************************************************
941 * CreateDIBSection (GDI32.@)
943 HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
944 VOID **bits, HANDLE section,
947 return DIB_CreateDIBSection(hdc, bmi, usage, bits, section, offset, 0);