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
28 #include "selectors.h"
31 #include "wine/debug.h"
34 WINE_DEFAULT_DEBUG_CHANNEL(bitmap
);
36 /***********************************************************************
37 * DIB_GetDIBWidthBytes
39 * Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
40 * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
42 int DIB_GetDIBWidthBytes( int width
, int depth
)
48 case 1: words
= (width
+ 31) / 32; break;
49 case 4: words
= (width
+ 7) / 8; break;
50 case 8: words
= (width
+ 3) / 4; break;
52 case 16: words
= (width
+ 1) / 2; break;
53 case 24: words
= (width
* 3 + 3)/4; break;
56 WARN("(%d): Unsupported depth\n", depth
);
64 /***********************************************************************
65 * DIB_GetDIBImageBytes
67 * Return the number of bytes used to hold the image in a DIB bitmap.
69 int DIB_GetDIBImageBytes( int width
, int height
, int depth
)
71 return DIB_GetDIBWidthBytes( width
, depth
) * abs( height
);
75 /***********************************************************************
78 * Return the size of the bitmap info structure including color table.
80 int DIB_BitmapInfoSize( const BITMAPINFO
* info
, WORD coloruse
)
84 if (info
->bmiHeader
.biSize
== sizeof(BITMAPCOREHEADER
))
86 BITMAPCOREHEADER
*core
= (BITMAPCOREHEADER
*)info
;
87 colors
= (core
->bcBitCount
<= 8) ? 1 << core
->bcBitCount
: 0;
88 return sizeof(BITMAPCOREHEADER
) + colors
*
89 ((coloruse
== DIB_RGB_COLORS
) ? sizeof(RGBTRIPLE
) : sizeof(WORD
));
91 else /* assume BITMAPINFOHEADER */
93 colors
= info
->bmiHeader
.biClrUsed
;
94 if (!colors
&& (info
->bmiHeader
.biBitCount
<= 8))
95 colors
= 1 << info
->bmiHeader
.biBitCount
;
96 return sizeof(BITMAPINFOHEADER
) + colors
*
97 ((coloruse
== DIB_RGB_COLORS
) ? sizeof(RGBQUAD
) : sizeof(WORD
));
102 /***********************************************************************
105 * Get the info from a bitmap header.
106 * Return 1 for INFOHEADER, 0 for COREHEADER,
107 * 4 for V4HEADER, 5 for V5HEADER, -1 for error.
109 static int DIB_GetBitmapInfo( const BITMAPINFOHEADER
*header
, DWORD
*width
,
110 int *height
, WORD
*bpp
, WORD
*compr
)
112 if (header
->biSize
== sizeof(BITMAPINFOHEADER
))
114 *width
= header
->biWidth
;
115 *height
= header
->biHeight
;
116 *bpp
= header
->biBitCount
;
117 *compr
= header
->biCompression
;
120 if (header
->biSize
== sizeof(BITMAPCOREHEADER
))
122 BITMAPCOREHEADER
*core
= (BITMAPCOREHEADER
*)header
;
123 *width
= core
->bcWidth
;
124 *height
= core
->bcHeight
;
125 *bpp
= core
->bcBitCount
;
129 if (header
->biSize
== sizeof(BITMAPV4HEADER
))
131 BITMAPV4HEADER
*v4hdr
= (BITMAPV4HEADER
*)header
;
132 *width
= v4hdr
->bV4Width
;
133 *height
= v4hdr
->bV4Height
;
134 *bpp
= v4hdr
->bV4BitCount
;
135 *compr
= v4hdr
->bV4V4Compression
;
138 if (header
->biSize
== sizeof(BITMAPV5HEADER
))
140 BITMAPV5HEADER
*v5hdr
= (BITMAPV5HEADER
*)header
;
141 *width
= v5hdr
->bV5Width
;
142 *height
= v5hdr
->bV5Height
;
143 *bpp
= v5hdr
->bV5BitCount
;
144 *compr
= v5hdr
->bV5Compression
;
147 ERR("(%ld): unknown/wrong size for header\n", header
->biSize
);
152 /***********************************************************************
153 * StretchDIBits (GDI32.@)
155 INT WINAPI
StretchDIBits(HDC hdc
, INT xDst
, INT yDst
, INT widthDst
,
156 INT heightDst
, INT xSrc
, INT ySrc
, INT widthSrc
,
157 INT heightSrc
, const void *bits
,
158 const BITMAPINFO
*info
, UINT wUsage
, DWORD dwRop
)
165 dc
= DC_GetDCUpdate( hdc
);
166 if(!dc
) return FALSE
;
168 if(dc
->funcs
->pStretchDIBits
)
170 heightSrc
= dc
->funcs
->pStretchDIBits(dc
->physDev
, xDst
, yDst
, widthDst
,
171 heightDst
, xSrc
, ySrc
, widthSrc
,
172 heightSrc
, bits
, info
, wUsage
, dwRop
);
173 GDI_ReleaseObj( hdc
);
175 else /* use StretchBlt */
177 HBITMAP hBitmap
, hOldBitmap
;
180 GDI_ReleaseObj( hdc
);
181 hdcMem
= CreateCompatibleDC( hdc
);
182 if (info
->bmiHeader
.biCompression
== BI_RLE4
||
183 info
->bmiHeader
.biCompression
== BI_RLE8
) {
185 /* when RLE compression is used, there may be some gaps (ie the DIB doesn't
186 * contain all the rectangle described in bmiHeader, but only part of it.
187 * This mean that those undescribed pixels must be left untouched.
188 * So, we first copy on a memory bitmap the current content of the
189 * destination rectangle, blit the DIB bits on top of it - hence leaving
190 * the gaps untouched -, and blitting the rectangle back.
191 * This insure that gaps are untouched on the destination rectangle
192 * Not doing so leads to trashed images (the gaps contain what was on the
193 * memory bitmap => generally black or garbage)
194 * Unfortunately, RLE DIBs without gaps will be slowed down. But this is
195 * another speed vs correctness issue. Anyway, if speed is needed, then the
196 * pStretchDIBits function shall be implemented.
199 hBitmap
= CreateCompatibleBitmap(hdc
, info
->bmiHeader
.biWidth
,
200 info
->bmiHeader
.biHeight
);
201 hOldBitmap
= SelectObject( hdcMem
, hBitmap
);
203 /* copy existing bitmap from destination dc */
204 StretchBlt( hdcMem
, xSrc
, abs(info
->bmiHeader
.biHeight
) - heightSrc
- ySrc
,
205 widthSrc
, heightSrc
, hdc
, xDst
, yDst
, widthDst
, heightDst
,
207 SetDIBits(hdcMem
, hBitmap
, 0, info
->bmiHeader
.biHeight
, bits
,
208 info
, DIB_RGB_COLORS
);
211 hBitmap
= CreateDIBitmap( hdc
, &info
->bmiHeader
, CBM_INIT
,
212 bits
, info
, wUsage
);
213 hOldBitmap
= SelectObject( hdcMem
, hBitmap
);
216 /* Origin for DIBitmap may be bottom left (positive biHeight) or top
217 left (negative biHeight) */
218 StretchBlt( hdc
, xDst
, yDst
, widthDst
, heightDst
,
219 hdcMem
, xSrc
, abs(info
->bmiHeader
.biHeight
) - heightSrc
- ySrc
,
220 widthSrc
, heightSrc
, dwRop
);
221 SelectObject( hdcMem
, hOldBitmap
);
223 DeleteObject( hBitmap
);
229 /******************************************************************************
230 * SetDIBits [GDI32.@] Sets pixels in a bitmap using colors from DIB
233 * hdc [I] Handle to device context
234 * hbitmap [I] Handle to bitmap
235 * startscan [I] Starting scan line
236 * lines [I] Number of scan lines
237 * bits [I] Array of bitmap bits
238 * info [I] Address of structure with data
239 * coloruse [I] Type of color indexes to use
242 * Success: Number of scan lines copied
245 INT WINAPI
SetDIBits( HDC hdc
, HBITMAP hbitmap
, UINT startscan
,
246 UINT lines
, LPCVOID bits
, const BITMAPINFO
*info
,
253 if (!(bitmap
= GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
))) return 0;
255 if (!(dc
= DC_GetDCUpdate( hdc
)))
257 if (coloruse
== DIB_RGB_COLORS
) FIXME( "shouldn't require a DC for DIB_RGB_COLORS\n" );
258 GDI_ReleaseObj( hbitmap
);
262 if (!bitmap
->funcs
&& !BITMAP_SetOwnerDC( hbitmap
, dc
)) goto done
;
264 if (bitmap
->funcs
&& bitmap
->funcs
->pSetDIBits
)
265 result
= bitmap
->funcs
->pSetDIBits( dc
->physDev
, hbitmap
, startscan
, lines
,
266 bits
, info
, coloruse
);
271 GDI_ReleaseObj( hdc
);
272 GDI_ReleaseObj( hbitmap
);
277 /***********************************************************************
278 * SetDIBitsToDevice (GDI32.@)
280 INT WINAPI
SetDIBitsToDevice(HDC hdc
, INT xDest
, INT yDest
, DWORD cx
,
281 DWORD cy
, INT xSrc
, INT ySrc
, UINT startscan
,
282 UINT lines
, LPCVOID bits
, const BITMAPINFO
*info
,
288 if (!(dc
= DC_GetDCUpdate( hdc
))) return 0;
290 if(dc
->funcs
->pSetDIBitsToDevice
)
291 ret
= dc
->funcs
->pSetDIBitsToDevice( dc
->physDev
, xDest
, yDest
, cx
, cy
, xSrc
,
292 ySrc
, startscan
, lines
, bits
,
295 FIXME("unimplemented on hdc %p\n", hdc
);
299 GDI_ReleaseObj( hdc
);
303 /***********************************************************************
304 * SetDIBColorTable (GDI32.@)
306 UINT WINAPI
SetDIBColorTable( HDC hdc
, UINT startpos
, UINT entries
, RGBQUAD
*colors
)
311 if (!(dc
= DC_GetDCUpdate( hdc
))) return 0;
313 if (dc
->funcs
->pSetDIBColorTable
)
314 result
= dc
->funcs
->pSetDIBColorTable(dc
->physDev
, startpos
, entries
, colors
);
316 GDI_ReleaseObj( hdc
);
321 /***********************************************************************
322 * GetDIBColorTable (GDI32.@)
324 UINT WINAPI
GetDIBColorTable( HDC hdc
, UINT startpos
, UINT entries
, RGBQUAD
*colors
)
329 if (!(dc
= DC_GetDCUpdate( hdc
))) return 0;
331 if (dc
->funcs
->pGetDIBColorTable
)
332 result
= dc
->funcs
->pGetDIBColorTable(dc
->physDev
, startpos
, entries
, colors
);
334 GDI_ReleaseObj( hdc
);
338 /* FIXME the following two structs should be combined with __sysPalTemplate in
339 objects/color.c - this should happen after de-X11-ing both of these
341 NB. RGBQUAD and PALETTEENTRY have different orderings of red, green
344 static RGBQUAD EGAColors
[16] = {
345 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
346 { 0x00, 0x00, 0x00, 0x00 },
347 { 0x00, 0x00, 0x80, 0x00 },
348 { 0x00, 0x80, 0x00, 0x00 },
349 { 0x00, 0x80, 0x80, 0x00 },
350 { 0x80, 0x00, 0x00, 0x00 },
351 { 0x80, 0x00, 0x80, 0x00 },
352 { 0x80, 0x80, 0x00, 0x00 },
353 { 0x80, 0x80, 0x80, 0x00 },
354 { 0xc0, 0xc0, 0xc0, 0x00 },
355 { 0x00, 0x00, 0xff, 0x00 },
356 { 0x00, 0xff, 0x00, 0x00 },
357 { 0x00, 0xff, 0xff, 0x00 },
358 { 0xff, 0x00, 0x00, 0x00 },
359 { 0xff, 0x00, 0xff, 0x00 },
360 { 0xff, 0xff, 0x00, 0x00 },
361 { 0xff, 0xff, 0xff, 0x00 }
365 static RGBQUAD DefLogPalette
[20] = { /* Copy of Default Logical Palette */
366 /* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
367 { 0x00, 0x00, 0x00, 0x00 },
368 { 0x00, 0x00, 0x80, 0x00 },
369 { 0x00, 0x80, 0x00, 0x00 },
370 { 0x00, 0x80, 0x80, 0x00 },
371 { 0x80, 0x00, 0x00, 0x00 },
372 { 0x80, 0x00, 0x80, 0x00 },
373 { 0x80, 0x80, 0x00, 0x00 },
374 { 0xc0, 0xc0, 0xc0, 0x00 },
375 { 0xc0, 0xdc, 0xc0, 0x00 },
376 { 0xf0, 0xca, 0xa6, 0x00 },
377 { 0xf0, 0xfb, 0xff, 0x00 },
378 { 0xa4, 0xa0, 0xa0, 0x00 },
379 { 0x80, 0x80, 0x80, 0x00 },
380 { 0x00, 0x00, 0xf0, 0x00 },
381 { 0x00, 0xff, 0x00, 0x00 },
382 { 0x00, 0xff, 0xff, 0x00 },
383 { 0xff, 0x00, 0x00, 0x00 },
384 { 0xff, 0x00, 0xff, 0x00 },
385 { 0xff, 0xff, 0x00, 0x00 },
386 { 0xff, 0xff, 0xff, 0x00 }
390 /******************************************************************************
391 * GetDIBits [GDI32.@] Retrieves bits of bitmap and copies to buffer
394 * Success: Number of scan lines copied from bitmap
397 * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
399 INT WINAPI
GetDIBits(
400 HDC hdc
, /* [in] Handle to device context */
401 HBITMAP hbitmap
, /* [in] Handle to bitmap */
402 UINT startscan
, /* [in] First scan line to set in dest bitmap */
403 UINT lines
, /* [in] Number of scan lines to copy */
404 LPVOID bits
, /* [out] Address of array for bitmap bits */
405 BITMAPINFO
* info
, /* [out] Address of structure with bitmap data */
406 UINT coloruse
) /* [in] RGB or palette index */
410 PALETTEENTRY
* palEntry
;
411 PALETTEOBJ
* palette
;
415 if (!(dc
= DC_GetDCUpdate( hdc
))) return 0;
416 if (!(bmp
= (BITMAPOBJ
*)GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
)))
418 GDI_ReleaseObj( hdc
);
421 if (!(palette
= (PALETTEOBJ
*)GDI_GetObjPtr( dc
->hPalette
, PALETTE_MAGIC
)))
423 GDI_ReleaseObj( hdc
);
424 GDI_ReleaseObj( hbitmap
);
428 /* Transfer color info */
430 if (info
->bmiHeader
.biBitCount
<= 8 && info
->bmiHeader
.biBitCount
> 0 ) {
432 info
->bmiHeader
.biClrUsed
= 0;
434 if(info
->bmiHeader
.biBitCount
>= bmp
->bitmap
.bmBitsPixel
) {
435 palEntry
= palette
->logpalette
.palPalEntry
;
436 for (i
= 0; i
< (1 << bmp
->bitmap
.bmBitsPixel
); i
++, palEntry
++) {
437 if (coloruse
== DIB_RGB_COLORS
) {
438 info
->bmiColors
[i
].rgbRed
= palEntry
->peRed
;
439 info
->bmiColors
[i
].rgbGreen
= palEntry
->peGreen
;
440 info
->bmiColors
[i
].rgbBlue
= palEntry
->peBlue
;
441 info
->bmiColors
[i
].rgbReserved
= 0;
443 else ((WORD
*)info
->bmiColors
)[i
] = (WORD
)i
;
446 switch (info
->bmiHeader
.biBitCount
) {
448 info
->bmiColors
[0].rgbRed
= info
->bmiColors
[0].rgbGreen
=
449 info
->bmiColors
[0].rgbBlue
= 0;
450 info
->bmiColors
[0].rgbReserved
= 0;
451 info
->bmiColors
[1].rgbRed
= info
->bmiColors
[1].rgbGreen
=
452 info
->bmiColors
[1].rgbBlue
= 0xff;
453 info
->bmiColors
[1].rgbReserved
= 0;
457 memcpy(info
->bmiColors
, EGAColors
, sizeof(EGAColors
));
465 memcpy(info
->bmiColors
, DefLogPalette
,
466 10 * sizeof(RGBQUAD
));
467 memcpy(info
->bmiColors
+ 246, DefLogPalette
+ 10,
468 10 * sizeof(RGBQUAD
));
469 color
= info
->bmiColors
+ 10;
470 for(r
= 0; r
<= 5; r
++) /* FIXME */
471 for(g
= 0; g
<= 5; g
++)
472 for(b
= 0; b
<= 5; b
++) {
473 color
->rgbRed
= (r
* 0xff) / 5;
474 color
->rgbGreen
= (g
* 0xff) / 5;
475 color
->rgbBlue
= (b
* 0xff) / 5;
476 color
->rgbReserved
= 0;
484 GDI_ReleaseObj( dc
->hPalette
);
488 /* If the bitmap object already have a dib section that contains image data, get the bits from it */
489 if(bmp
->dib
&& bmp
->dib
->dsBm
.bmBitsPixel
>= 15 && info
->bmiHeader
.biBitCount
>= 15)
491 /*FIXME: Only RGB dibs supported for now */
492 unsigned int srcwidth
= bmp
->dib
->dsBm
.bmWidth
, srcwidthb
= bmp
->dib
->dsBm
.bmWidthBytes
;
493 int dstwidthb
= DIB_GetDIBWidthBytes( info
->bmiHeader
.biWidth
, info
->bmiHeader
.biBitCount
);
494 LPBYTE dbits
= bits
, sbits
= (LPBYTE
) bmp
->dib
->dsBm
.bmBits
+ (startscan
* srcwidthb
);
497 if ((info
->bmiHeader
.biHeight
< 0) ^ (bmp
->dib
->dsBmih
.biHeight
< 0))
499 dbits
= (LPBYTE
)bits
+ (dstwidthb
* (lines
-1));
500 dstwidthb
= -dstwidthb
;
503 switch( info
->bmiHeader
.biBitCount
) {
506 case 16: /* 16 bpp dstDIB */
508 LPWORD dstbits
= (LPWORD
)dbits
;
509 WORD rmask
= 0x7c00, gmask
= 0x03e0, bmask
= 0x001f;
511 /* FIXME: BI_BITFIELDS not supported yet */
513 switch(bmp
->dib
->dsBm
.bmBitsPixel
) {
515 case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
517 /* FIXME: BI_BITFIELDS not supported yet */
518 for (y
= 0; y
< lines
; y
++, dbits
+=dstwidthb
, sbits
+=srcwidthb
)
519 memcpy(dbits
, sbits
, srcwidthb
);
523 case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
525 LPBYTE srcbits
= sbits
;
527 for( y
= 0; y
< lines
; y
++) {
528 for( x
= 0; x
< srcwidth
; x
++, srcbits
+= 3)
529 *dstbits
++ = ((srcbits
[0] >> 3) & bmask
) |
530 (((WORD
)srcbits
[1] << 2) & gmask
) |
531 (((WORD
)srcbits
[2] << 7) & rmask
);
533 dstbits
= (LPWORD
)(dbits
+=dstwidthb
);
534 srcbits
= (sbits
+= srcwidthb
);
539 case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
541 LPDWORD srcbits
= (LPDWORD
)sbits
;
544 for( y
= 0; y
< lines
; y
++) {
545 for( x
= 0; x
< srcwidth
; x
++ ) {
547 *dstbits
++ = (WORD
)(((val
>> 3) & bmask
) | ((val
>> 6) & gmask
) |
548 ((val
>> 9) & rmask
));
550 dstbits
= (LPWORD
)(dbits
+=dstwidthb
);
551 srcbits
= (LPDWORD
)(sbits
+=srcwidthb
);
556 default: /* ? bit bmp -> 16 bit DIB */
557 FIXME("15/16 bit DIB %d bit bitmap\n",
558 bmp
->bitmap
.bmBitsPixel
);
564 case 24: /* 24 bpp dstDIB */
566 LPBYTE dstbits
= dbits
;
568 switch(bmp
->dib
->dsBm
.bmBitsPixel
) {
570 case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
572 LPWORD srcbits
= (LPWORD
)sbits
;
575 /* FIXME: BI_BITFIELDS not supported yet */
576 for( y
= 0; y
< lines
; y
++) {
577 for( x
= 0; x
< srcwidth
; x
++ ) {
579 *dstbits
++ = (BYTE
)(((val
<< 3) & 0xf8) | ((val
>> 2) & 0x07));
580 *dstbits
++ = (BYTE
)(((val
>> 2) & 0xf8) | ((val
>> 7) & 0x07));
581 *dstbits
++ = (BYTE
)(((val
>> 7) & 0xf8) | ((val
>> 12) & 0x07));
583 dstbits
= (LPBYTE
)(dbits
+=dstwidthb
);
584 srcbits
= (LPWORD
)(sbits
+=srcwidthb
);
589 case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
591 for (y
= 0; y
< lines
; y
++, dbits
+=dstwidthb
, sbits
+=srcwidthb
)
592 memcpy(dbits
, sbits
, srcwidthb
);
596 case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
598 LPBYTE srcbits
= (LPBYTE
)sbits
;
600 for( y
= 0; y
< lines
; y
++) {
601 for( x
= 0; x
< srcwidth
; x
++, srcbits
++ ) {
602 *dstbits
++ = *srcbits
++;
603 *dstbits
++ = *srcbits
++;
604 *dstbits
++ = *srcbits
++;
606 dstbits
=(LPBYTE
)(dbits
+=dstwidthb
);
607 srcbits
= (LPBYTE
)(sbits
+=srcwidthb
);
612 default: /* ? bit bmp -> 24 bit DIB */
613 FIXME("24 bit DIB %d bit bitmap\n",
614 bmp
->bitmap
.bmBitsPixel
);
620 case 32: /* 32 bpp dstDIB */
622 LPDWORD dstbits
= (LPDWORD
)dbits
;
624 /* FIXME: BI_BITFIELDS not supported yet */
626 switch(bmp
->dib
->dsBm
.bmBitsPixel
) {
627 case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
629 LPWORD srcbits
= (LPWORD
)sbits
;
632 /* FIXME: BI_BITFIELDS not supported yet */
633 for( y
= 0; y
< lines
; y
++) {
634 for( x
= 0; x
< srcwidth
; x
++ ) {
635 val
= (DWORD
)*srcbits
++;
636 *dstbits
++ = ((val
<< 3) & 0xf8) | ((val
>> 2) & 0x07) |
637 ((val
<< 6) & 0xf800) | ((val
<< 1) & 0x0700) |
638 ((val
<< 9) & 0xf80000) | ((val
<< 4) & 0x070000);
640 dstbits
=(LPDWORD
)(dbits
+=dstwidthb
);
641 srcbits
=(LPWORD
)(sbits
+=srcwidthb
);
646 case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
648 LPBYTE srcbits
= sbits
;
650 for( y
= 0; y
< lines
; y
++) {
651 for( x
= 0; x
< srcwidth
; x
++, srcbits
+=3 )
652 *dstbits
++ = ((DWORD
)*srcbits
) & 0x00ffffff;
653 dstbits
=(LPDWORD
)(dbits
+=dstwidthb
);
654 srcbits
=(sbits
+=srcwidthb
);
659 case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
661 /* FIXME: BI_BITFIELDS not supported yet */
662 for (y
= 0; y
< lines
; y
++, dbits
+=dstwidthb
, sbits
+=srcwidthb
)
663 memcpy(dbits
, sbits
, srcwidthb
);
667 default: /* ? bit bmp -> 16 bit DIB */
668 FIXME("15/16 bit DIB %d bit bitmap\n",
669 bmp
->bitmap
.bmBitsPixel
);
675 default: /* ? bit DIB */
676 FIXME("Unsupported DIB depth %d\n", info
->bmiHeader
.biBitCount
);
680 /* Otherwise, get bits from the XImage */
683 if (!bmp
->funcs
&& !BITMAP_SetOwnerDC( hbitmap
, dc
)) lines
= 0;
686 if (bmp
->funcs
&& bmp
->funcs
->pGetDIBits
)
687 lines
= bmp
->funcs
->pGetDIBits( dc
->physDev
, hbitmap
, startscan
,
688 lines
, bits
, info
, coloruse
);
690 lines
= 0; /* FIXME: should copy from bmp->bitmap.bmBits */
694 else if( info
->bmiHeader
.biSize
>= sizeof(BITMAPINFOHEADER
) )
696 /* fill in struct members */
698 if( info
->bmiHeader
.biBitCount
== 0)
700 info
->bmiHeader
.biWidth
= bmp
->bitmap
.bmWidth
;
701 info
->bmiHeader
.biHeight
= bmp
->bitmap
.bmHeight
;
702 info
->bmiHeader
.biPlanes
= 1;
703 info
->bmiHeader
.biBitCount
= bmp
->bitmap
.bmBitsPixel
;
704 info
->bmiHeader
.biSizeImage
=
705 DIB_GetDIBImageBytes( bmp
->bitmap
.bmWidth
,
706 bmp
->bitmap
.bmHeight
,
707 bmp
->bitmap
.bmBitsPixel
);
708 info
->bmiHeader
.biCompression
= 0;
712 info
->bmiHeader
.biSizeImage
= DIB_GetDIBImageBytes(
713 info
->bmiHeader
.biWidth
,
714 info
->bmiHeader
.biHeight
,
715 info
->bmiHeader
.biBitCount
);
719 TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
720 info
->bmiHeader
.biSizeImage
, info
->bmiHeader
.biWidth
,
721 info
->bmiHeader
.biHeight
);
723 GDI_ReleaseObj( hdc
);
724 GDI_ReleaseObj( hbitmap
);
730 /***********************************************************************
731 * CreateDIBitmap (GDI32.@)
733 HBITMAP WINAPI
CreateDIBitmap( HDC hdc
, const BITMAPINFOHEADER
*header
,
734 DWORD init
, LPCVOID bits
, const BITMAPINFO
*data
,
745 if (DIB_GetBitmapInfo( header
, &width
, &height
, &bpp
, &compr
) == -1) return 0;
746 if (height
< 0) height
= -height
;
748 /* Check if we should create a monochrome or color bitmap. */
749 /* We create a monochrome bitmap only if it has exactly 2 */
750 /* colors, which are black followed by white, nothing else. */
751 /* In all other cases, we create a color bitmap. */
753 if (bpp
!= 1) fColor
= TRUE
;
754 else if ((coloruse
!= DIB_RGB_COLORS
) ||
755 (init
!= CBM_INIT
) || !data
) fColor
= FALSE
;
758 if (data
->bmiHeader
.biSize
== sizeof(BITMAPINFOHEADER
))
760 RGBQUAD
*rgb
= data
->bmiColors
;
761 DWORD col
= RGB( rgb
->rgbRed
, rgb
->rgbGreen
, rgb
->rgbBlue
);
763 /* Check if the first color of the colormap is black */
764 if ((col
== RGB(0,0,0)))
767 col
= RGB( rgb
->rgbRed
, rgb
->rgbGreen
, rgb
->rgbBlue
);
768 /* If the second color is white, create a monochrome bitmap */
769 fColor
= (col
!= RGB(0xff,0xff,0xff));
771 /* Note : If the first color of the colormap is white
772 followed by black, we have to create a color bitmap.
773 If we don't the white will be displayed in black later on!*/
776 else if (data
->bmiHeader
.biSize
== sizeof(BITMAPCOREHEADER
))
778 RGBTRIPLE
*rgb
= ((BITMAPCOREINFO
*)data
)->bmciColors
;
779 DWORD col
= RGB( rgb
->rgbtRed
, rgb
->rgbtGreen
, rgb
->rgbtBlue
);
780 if ((col
== RGB(0,0,0)))
783 col
= RGB( rgb
->rgbtRed
, rgb
->rgbtGreen
, rgb
->rgbtBlue
);
784 fColor
= (col
!= RGB(0xff,0xff,0xff));
788 else if (data
->bmiHeader
.biSize
== sizeof(BITMAPV4HEADER
))
789 { /* FIXME: correct ? */
790 RGBQUAD
*rgb
= data
->bmiColors
;
791 DWORD col
= RGB( rgb
->rgbRed
, rgb
->rgbGreen
, rgb
->rgbBlue
);
793 /* Check if the first color of the colormap is black */
794 if ((col
== RGB(0,0,0)))
797 col
= RGB( rgb
->rgbRed
, rgb
->rgbGreen
, rgb
->rgbBlue
);
798 /* If the second color is white, create a monochrome bitmap */
799 fColor
= (col
!= RGB(0xff,0xff,0xff));
801 /* Note : If the first color of the colormap is white
802 followed by black, we have to create a color bitmap.
803 If we don't the white will be displayed in black later on!*/
808 ERR("(%ld): wrong/unknown size for data\n",
809 data
->bmiHeader
.biSize
);
814 /* Now create the bitmap */
816 if (!(dc
= DC_GetDCPtr( hdc
))) return 0;
819 handle
= CreateBitmap( width
, height
, GetDeviceCaps( hdc
, PLANES
),
820 GetDeviceCaps( hdc
, BITSPIXEL
), NULL
);
821 else handle
= CreateBitmap( width
, height
, 1, 1, NULL
);
825 if (init
== CBM_INIT
) SetDIBits( hdc
, handle
, 0, height
, bits
, data
, coloruse
);
826 else if (!BITMAP_SetOwnerDC( handle
, dc
))
828 DeleteObject( handle
);
833 GDI_ReleaseObj( hdc
);
837 /***********************************************************************
838 * CreateDIBSection (GDI.489)
840 HBITMAP16 WINAPI
CreateDIBSection16 (HDC16 hdc
, BITMAPINFO
*bmi
, UINT16 usage
,
841 SEGPTR
*bits16
, HANDLE section
, DWORD offset
)
846 hbitmap
= CreateDIBSection( HDC_32(hdc
), bmi
, usage
, &bits32
, section
, offset
);
849 BITMAPOBJ
*bmp
= (BITMAPOBJ
*) GDI_GetObjPtr(hbitmap
, BITMAP_MAGIC
);
850 if (bmp
&& bmp
->dib
&& bits32
)
852 BITMAPINFOHEADER
*bi
= &bmi
->bmiHeader
;
853 INT height
= bi
->biHeight
>= 0 ? bi
->biHeight
: -bi
->biHeight
;
854 INT width_bytes
= DIB_GetDIBWidthBytes(bi
->biWidth
, bi
->biBitCount
);
855 INT size
= (bi
->biSizeImage
&& bi
->biCompression
!= BI_RGB
) ?
856 bi
->biSizeImage
: width_bytes
* height
;
858 /* calculate number of sel's needed for size with 64K steps */
859 WORD count
= (size
+ 0xffff) / 0x10000;
860 WORD sel
= AllocSelectorArray16(count
);
863 for (i
= 0; i
< count
; i
++)
865 SetSelectorBase(sel
+ (i
<< __AHSHIFT
), (DWORD
)bits32
+ i
* 0x10000);
866 SetSelectorLimit16(sel
+ (i
<< __AHSHIFT
), size
- 1); /* yep, limit is correct */
869 bmp
->segptr_bits
= MAKESEGPTR( sel
, 0 );
870 if (bits16
) *bits16
= bmp
->segptr_bits
;
872 if (bmp
) GDI_ReleaseObj( hbitmap
);
874 return HBITMAP_16(hbitmap
);
877 /***********************************************************************
878 * DIB_CreateDIBSection
880 HBITMAP
DIB_CreateDIBSection(HDC hdc
, BITMAPINFO
*bmi
, UINT usage
,
881 LPVOID
*bits
, HANDLE section
,
882 DWORD offset
, DWORD ovr_pitch
)
886 BOOL bDesktopDC
= FALSE
;
888 /* If the reference hdc is null, take the desktop dc */
891 hdc
= CreateCompatibleDC(0);
895 if ((dc
= DC_GetDCPtr( hdc
)))
897 hbitmap
= dc
->funcs
->pCreateDIBSection(dc
->physDev
, bmi
, usage
, bits
, section
, offset
, ovr_pitch
);
907 /***********************************************************************
908 * CreateDIBSection (GDI32.@)
910 HBITMAP WINAPI
CreateDIBSection(HDC hdc
, BITMAPINFO
*bmi
, UINT usage
,
911 LPVOID
*bits
, HANDLE section
,
914 return DIB_CreateDIBSection(hdc
, bmi
, usage
, bits
, section
, offset
, 0);
917 /***********************************************************************
918 * DIB_CreateDIBFromBitmap
919 * Allocates a packed DIB and copies the bitmap data into it.
921 HGLOBAL
DIB_CreateDIBFromBitmap(HDC hdc
, HBITMAP hBmp
)
923 BITMAPOBJ
*pBmp
= NULL
;
924 HGLOBAL hPackedDIB
= 0;
925 LPBYTE pPackedDIB
= NULL
;
926 LPBITMAPINFOHEADER pbmiHeader
= NULL
;
927 unsigned int width
, height
, depth
, cDataSize
= 0, cPackedSize
= 0,
928 OffsetBits
= 0, nLinesCopied
= 0;
930 /* Get a pointer to the BITMAPOBJ structure */
931 pBmp
= (BITMAPOBJ
*)GDI_GetObjPtr( hBmp
, BITMAP_MAGIC
);
932 if (!pBmp
) return hPackedDIB
;
934 /* Get the bitmap dimensions */
935 width
= pBmp
->bitmap
.bmWidth
;
936 height
= pBmp
->bitmap
.bmHeight
;
937 depth
= pBmp
->bitmap
.bmBitsPixel
;
940 * A packed DIB contains a BITMAPINFO structure followed immediately by
941 * an optional color palette and the pixel data.
944 /* Calculate the size of the packed DIB */
945 cDataSize
= DIB_GetDIBImageBytes( width
, height
, depth
);
946 cPackedSize
= sizeof(BITMAPINFOHEADER
)
947 + ( (depth
<= 8) ? (sizeof(RGBQUAD
) * (1 << depth
)) : 0 )
949 /* Get the offset to the bits */
950 OffsetBits
= cPackedSize
- cDataSize
;
952 /* Allocate the packed DIB */
953 TRACE("\tAllocating packed DIB of size %d\n", cPackedSize
);
954 hPackedDIB
= GlobalAlloc(GMEM_MOVEABLE
| GMEM_DDESHARE
/*| GMEM_ZEROINIT*/,
958 WARN("Could not allocate packed DIB!\n");
962 /* A packed DIB starts with a BITMAPINFOHEADER */
963 pPackedDIB
= (LPBYTE
)GlobalLock(hPackedDIB
);
964 pbmiHeader
= (LPBITMAPINFOHEADER
)pPackedDIB
;
966 /* Init the BITMAPINFOHEADER */
967 pbmiHeader
->biSize
= sizeof(BITMAPINFOHEADER
);
968 pbmiHeader
->biWidth
= width
;
969 pbmiHeader
->biHeight
= height
;
970 pbmiHeader
->biPlanes
= 1;
971 pbmiHeader
->biBitCount
= depth
;
972 pbmiHeader
->biCompression
= BI_RGB
;
973 pbmiHeader
->biSizeImage
= 0;
974 pbmiHeader
->biXPelsPerMeter
= pbmiHeader
->biYPelsPerMeter
= 0;
975 pbmiHeader
->biClrUsed
= 0;
976 pbmiHeader
->biClrImportant
= 0;
978 /* Retrieve the DIB bits from the bitmap and fill in the
979 * DIB color table if present */
981 nLinesCopied
= GetDIBits(hdc
, /* Handle to device context */
982 hBmp
, /* Handle to bitmap */
983 0, /* First scan line to set in dest bitmap */
984 height
, /* Number of scan lines to copy */
985 pPackedDIB
+ OffsetBits
, /* [out] Address of array for bitmap bits */
986 (LPBITMAPINFO
) pbmiHeader
, /* [out] Address of BITMAPINFO structure */
987 0); /* RGB or palette index */
988 GlobalUnlock(hPackedDIB
);
990 /* Cleanup if GetDIBits failed */
991 if (nLinesCopied
!= height
)
993 TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied
, height
);
994 GlobalFree(hPackedDIB
);
999 GDI_ReleaseObj( hBmp
);