4 * Copyright 1993 Alexandre Julliard
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "wine/winbase16.h"
26 #include "wine/wingdi16.h"
28 #include "gdi_private.h"
29 #include "wine/debug.h"
31 WINE_DEFAULT_DEBUG_CHANNEL(bitmap
);
34 static HGDIOBJ
BITMAP_SelectObject( HGDIOBJ handle
, void *obj
, HDC hdc
);
35 static INT
BITMAP_GetObject16( HGDIOBJ handle
, void *obj
, INT count
, LPVOID buffer
);
36 static INT
BITMAP_GetObject( HGDIOBJ handle
, void *obj
, INT count
, LPVOID buffer
);
37 static BOOL
BITMAP_DeleteObject( HGDIOBJ handle
, void *obj
);
39 static const struct gdi_obj_funcs bitmap_funcs
=
41 BITMAP_SelectObject
, /* pSelectObject */
42 BITMAP_GetObject16
, /* pGetObject16 */
43 BITMAP_GetObject
, /* pGetObjectA */
44 BITMAP_GetObject
, /* pGetObjectW */
45 NULL
, /* pUnrealizeObject */
46 BITMAP_DeleteObject
/* pDeleteObject */
49 /***********************************************************************
50 * BITMAP_GetWidthBytes
52 * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
55 INT
BITMAP_GetWidthBytes( INT bmWidth
, INT bpp
)
60 return 2 * ((bmWidth
+15) >> 4);
63 bmWidth
*= 3; /* fall through */
65 return bmWidth
+ (bmWidth
& 1);
75 return 2 * ((bmWidth
+3) >> 2);
78 WARN("Unknown depth %d, please report.\n", bpp
);
84 /******************************************************************************
85 * CreateBitmap [GDI32.@]
87 * Creates a bitmap with the specified info.
90 * width [I] bitmap width
91 * height [I] bitmap height
92 * planes [I] Number of color planes
93 * bpp [I] Number of bits to identify a color
94 * bits [I] Pointer to array containing color data
97 * Success: Handle to bitmap
100 HBITMAP WINAPI
CreateBitmap( INT width
, INT height
, UINT planes
,
101 UINT bpp
, LPCVOID bits
)
107 bm
.bmHeight
= height
;
108 bm
.bmWidthBytes
= BITMAP_GetWidthBytes( width
, bpp
);
109 bm
.bmPlanes
= planes
;
110 bm
.bmBitsPixel
= bpp
;
111 bm
.bmBits
= (LPVOID
)bits
;
113 return CreateBitmapIndirect( &bm
);
116 /******************************************************************************
117 * CreateCompatibleBitmap [GDI32.@]
119 * Creates a bitmap compatible with the DC.
122 * hdc [I] Handle to device context
123 * width [I] Width of bitmap
124 * height [I] Height of bitmap
127 * Success: Handle to bitmap
130 HBITMAP WINAPI
CreateCompatibleBitmap( HDC hdc
, INT width
, INT height
)
135 TRACE("(%p,%d,%d) =\n", hdc
, width
, height
);
137 if ((width
>= 0x10000) || (height
>= 0x10000))
139 FIXME("got bad width %d or height %d, please look for reason\n",
144 if (!(dc
= DC_GetDCPtr(hdc
))) return 0;
146 if (GDIMAGIC( dc
->header
.wMagic
) != MEMORY_DC_MAGIC
)
148 hbmpRet
= CreateBitmap(width
, height
,
149 GetDeviceCaps(hdc
, PLANES
),
150 GetDeviceCaps(hdc
, BITSPIXEL
),
155 BITMAPOBJ
*bmp
= GDI_GetObjPtr( dc
->hBitmap
, BITMAP_MAGIC
);
159 /* A device-dependent bitmap is selected in the DC */
160 hbmpRet
= CreateBitmap(width
, height
,
161 bmp
->bitmap
.bmPlanes
,
162 bmp
->bitmap
.bmBitsPixel
,
167 /* A DIB section is selected in the DC */
171 /* Allocate memory for a BITMAPINFOHEADER structure and a
172 color table. The maximum number of colors in a color table
173 is 256 which corresponds to a bitmap with depth 8.
174 Bitmaps with higher depths don't have color tables. */
175 bi
= HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER
) + 256 * sizeof(RGBQUAD
));
179 bi
->bmiHeader
.biSize
= sizeof(bi
->bmiHeader
);
180 bi
->bmiHeader
.biWidth
= width
;
181 bi
->bmiHeader
.biHeight
= height
;
182 bi
->bmiHeader
.biPlanes
= bmp
->dib
->dsBmih
.biPlanes
;
183 bi
->bmiHeader
.biBitCount
= bmp
->dib
->dsBmih
.biBitCount
;
184 bi
->bmiHeader
.biCompression
= bmp
->dib
->dsBmih
.biCompression
;
185 bi
->bmiHeader
.biSizeImage
= 0;
186 bi
->bmiHeader
.biXPelsPerMeter
= bmp
->dib
->dsBmih
.biXPelsPerMeter
;
187 bi
->bmiHeader
.biYPelsPerMeter
= bmp
->dib
->dsBmih
.biYPelsPerMeter
;
188 bi
->bmiHeader
.biClrUsed
= bmp
->dib
->dsBmih
.biClrUsed
;
189 bi
->bmiHeader
.biClrImportant
= bmp
->dib
->dsBmih
.biClrImportant
;
191 if (bi
->bmiHeader
.biCompression
== BI_BITFIELDS
)
193 /* Copy the color masks */
194 CopyMemory(bi
->bmiColors
, bmp
->dib
->dsBitfields
, 3 * sizeof(DWORD
));
196 else if (bi
->bmiHeader
.biBitCount
<= 8)
198 /* Copy the color table */
199 GetDIBColorTable(hdc
, 0, 256, bi
->bmiColors
);
202 hbmpRet
= CreateDIBSection(hdc
, bi
, DIB_RGB_COLORS
, &bits
, NULL
, 0);
203 HeapFree(GetProcessHeap(), 0, bi
);
206 GDI_ReleaseObj(dc
->hBitmap
);
211 TRACE("\t\t%p\n", hbmpRet
);
216 /******************************************************************************
217 * CreateBitmapIndirect [GDI32.@]
219 * Creates a bitmap with the specified info.
222 * bmp [I] Pointer to the bitmap info describing the bitmap
225 * Success: Handle to bitmap
226 * Failure: NULL. Use GetLastError() to determine the cause.
229 * If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
231 HBITMAP WINAPI
CreateBitmapIndirect( const BITMAP
*bmp
)
237 if (!bmp
|| bmp
->bmType
|| bmp
->bmPlanes
!= 1)
239 if (bmp
&& bmp
->bmPlanes
!= 1)
240 FIXME("planes = %d\n", bmp
->bmPlanes
);
241 SetLastError( ERROR_INVALID_PARAMETER
);
247 if (!bm
.bmWidth
|| !bm
.bmHeight
)
249 bm
.bmWidth
= bm
.bmHeight
= 1;
250 bm
.bmPlanes
= bm
.bmBitsPixel
= 1;
257 bm
.bmHeight
= -bm
.bmHeight
;
259 bm
.bmWidth
= -bm
.bmWidth
;
262 /* Create the BITMAPOBJ */
263 bmpobj
= GDI_AllocObject( sizeof(BITMAPOBJ
), BITMAP_MAGIC
,
264 (HGDIOBJ
*)&hbitmap
, &bitmap_funcs
);
268 SetLastError( ERROR_NOT_ENOUGH_MEMORY
);
272 TRACE("%dx%d, %d colors returning %p\n", bm
.bmWidth
, bm
.bmHeight
,
273 1 << (bm
.bmPlanes
* bm
.bmBitsPixel
), hbitmap
);
278 bmpobj
->bitmap
.bmBits
= NULL
;
279 bmpobj
->funcs
= NULL
;
281 bmpobj
->segptr_bits
= 0;
284 SetBitmapBits( hbitmap
, bm
.bmHeight
* bm
.bmWidthBytes
, bm
.bmBits
);
286 GDI_ReleaseObj( hbitmap
);
291 /***********************************************************************
292 * GetBitmapBits [GDI32.@]
294 * Copies bitmap bits of bitmap to buffer.
297 * Success: Number of bytes copied
300 LONG WINAPI
GetBitmapBits(
301 HBITMAP hbitmap
, /* [in] Handle to bitmap */
302 LONG count
, /* [in] Number of bytes to copy */
303 LPVOID bits
) /* [out] Pointer to buffer to receive bits */
305 BITMAPOBJ
*bmp
= (BITMAPOBJ
*) GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
);
310 if (bmp
->dib
) /* simply copy the bits from the DIB */
312 DIBSECTION
*dib
= bmp
->dib
;
313 const char *src
= dib
->dsBm
.bmBits
;
314 INT width_bytes
= BITMAP_GetWidthBytes(dib
->dsBm
.bmWidth
, dib
->dsBm
.bmBitsPixel
);
315 DWORD max
= width_bytes
* bmp
->bitmap
.bmHeight
;
323 if (count
> max
) count
= max
;
326 /* GetBitmapBits returns not 32-bit aligned data */
328 if (bmp
->dib
->dsBmih
.biHeight
>= 0) /* not top-down, need to flip contents vertically */
330 src
+= dib
->dsBm
.bmWidthBytes
* dib
->dsBm
.bmHeight
;
333 src
-= dib
->dsBm
.bmWidthBytes
;
334 memcpy( bits
, src
, min( count
, width_bytes
) );
335 bits
= (char *)bits
+ width_bytes
;
336 count
-= width_bytes
;
343 memcpy( bits
, src
, min( count
, width_bytes
) );
344 src
+= dib
->dsBm
.bmWidthBytes
;
345 bits
= (char *)bits
+ width_bytes
;
346 count
-= width_bytes
;
352 /* If the bits vector is null, the function should return the read size */
355 ret
= bmp
->bitmap
.bmWidthBytes
* bmp
->bitmap
.bmHeight
;
360 WARN("(%ld): Negative number of bytes passed???\n", count
);
364 /* Only get entire lines */
365 height
= count
/ bmp
->bitmap
.bmWidthBytes
;
366 if (height
> bmp
->bitmap
.bmHeight
) height
= bmp
->bitmap
.bmHeight
;
367 count
= height
* bmp
->bitmap
.bmWidthBytes
;
370 WARN("Less than one entire line requested\n");
376 TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
377 hbitmap
, count
, bits
, bmp
->bitmap
.bmWidth
, bmp
->bitmap
.bmHeight
,
378 1 << bmp
->bitmap
.bmBitsPixel
, height
);
380 if(bmp
->funcs
&& bmp
->funcs
->pGetBitmapBits
)
382 TRACE("Calling device specific BitmapBits\n");
383 ret
= bmp
->funcs
->pGetBitmapBits(hbitmap
, bits
, count
);
386 if(!bmp
->bitmap
.bmBits
) {
387 TRACE("Bitmap is empty\n");
388 memset(bits
, 0, count
);
391 memcpy(bits
, bmp
->bitmap
.bmBits
, count
);
397 GDI_ReleaseObj( hbitmap
);
402 /******************************************************************************
403 * SetBitmapBits [GDI32.@]
405 * Sets bits of color data for a bitmap.
408 * Success: Number of bytes used in setting the bitmap bits
411 LONG WINAPI
SetBitmapBits(
412 HBITMAP hbitmap
, /* [in] Handle to bitmap */
413 LONG count
, /* [in] Number of bytes in bitmap array */
414 LPCVOID bits
) /* [in] Address of array with bitmap bits */
416 BITMAPOBJ
*bmp
= (BITMAPOBJ
*) GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
);
419 if ((!bmp
) || (!bits
))
423 WARN("(%ld): Negative number of bytes passed???\n", count
);
427 if (bmp
->dib
) /* simply copy the bits into the DIB */
429 DIBSECTION
*dib
= bmp
->dib
;
430 char *dest
= dib
->dsBm
.bmBits
;
431 DWORD max
= dib
->dsBm
.bmWidthBytes
* dib
->dsBm
.bmHeight
;
432 if (count
> max
) count
= max
;
435 if (bmp
->dib
->dsBmih
.biHeight
>= 0) /* not top-down, need to flip contents vertically */
437 dest
+= dib
->dsBm
.bmWidthBytes
* dib
->dsBm
.bmHeight
;
440 dest
-= dib
->dsBm
.bmWidthBytes
;
441 memcpy( dest
, bits
, min( count
, dib
->dsBm
.bmWidthBytes
) );
442 bits
= (char *)bits
+ dib
->dsBm
.bmWidthBytes
;
443 count
-= dib
->dsBm
.bmWidthBytes
;
446 else memcpy( dest
, bits
, count
);
448 GDI_ReleaseObj( hbitmap
);
452 /* Only get entire lines */
453 height
= count
/ bmp
->bitmap
.bmWidthBytes
;
454 if (height
> bmp
->bitmap
.bmHeight
) height
= bmp
->bitmap
.bmHeight
;
455 count
= height
* bmp
->bitmap
.bmWidthBytes
;
457 TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
458 hbitmap
, count
, bits
, bmp
->bitmap
.bmWidth
, bmp
->bitmap
.bmHeight
,
459 1 << bmp
->bitmap
.bmBitsPixel
, height
);
461 if(bmp
->funcs
&& bmp
->funcs
->pSetBitmapBits
) {
463 TRACE("Calling device specific BitmapBits\n");
464 ret
= bmp
->funcs
->pSetBitmapBits(hbitmap
, bits
, count
);
467 if(!bmp
->bitmap
.bmBits
) /* Alloc enough for entire bitmap */
468 bmp
->bitmap
.bmBits
= HeapAlloc( GetProcessHeap(), 0, count
);
469 if(!bmp
->bitmap
.bmBits
) {
470 WARN("Unable to allocate bit buffer\n");
473 memcpy(bmp
->bitmap
.bmBits
, bits
, count
);
478 GDI_ReleaseObj( hbitmap
);
482 /**********************************************************************
486 HBITMAP
BITMAP_CopyBitmap(HBITMAP hbitmap
)
488 BITMAPOBJ
*bmp
= (BITMAPOBJ
*) GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
);
496 res
= CreateBitmapIndirect(&bm
);
499 char *buf
= HeapAlloc( GetProcessHeap(), 0, bm
.bmWidthBytes
*
501 GetBitmapBits (hbitmap
, bm
.bmWidthBytes
* bm
.bmHeight
, buf
);
502 SetBitmapBits (res
, bm
.bmWidthBytes
* bm
.bmHeight
, buf
);
503 HeapFree( GetProcessHeap(), 0, buf
);
506 GDI_ReleaseObj( hbitmap
);
511 /***********************************************************************
514 * Set the type of DC that owns the bitmap. This is used when the
515 * bitmap is selected into a device to initialize the bitmap function
518 BOOL
BITMAP_SetOwnerDC( HBITMAP hbitmap
, DC
*dc
)
523 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
524 if (hbitmap
== GetStockObject(DEFAULT_BITMAP
)) return TRUE
;
526 if (!(bitmap
= GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
))) return FALSE
;
529 if (!bitmap
->funcs
) /* not owned by a DC yet */
531 if (dc
->funcs
->pCreateBitmap
) ret
= dc
->funcs
->pCreateBitmap( dc
->physDev
, hbitmap
);
532 if (ret
) bitmap
->funcs
= dc
->funcs
;
534 else if (bitmap
->funcs
!= dc
->funcs
)
536 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap
);
539 GDI_ReleaseObj( hbitmap
);
544 /***********************************************************************
545 * BITMAP_SelectObject
547 static HGDIOBJ
BITMAP_SelectObject( HGDIOBJ handle
, void *obj
, HDC hdc
)
550 BITMAPOBJ
*bitmap
= obj
;
551 DC
*dc
= DC_GetDCPtr( hdc
);
554 if (GetObjectType( hdc
) != OBJ_MEMDC
)
556 GDI_ReleaseObj( hdc
);
560 if (handle
== dc
->hBitmap
) goto done
; /* nothing to do */
562 if (bitmap
->header
.dwCount
&& (handle
!= GetStockObject(DEFAULT_BITMAP
)))
564 WARN( "Bitmap already selected in another DC\n" );
565 GDI_ReleaseObj( hdc
);
569 if (!bitmap
->funcs
&& !BITMAP_SetOwnerDC( handle
, dc
))
571 GDI_ReleaseObj( hdc
);
575 if (dc
->funcs
->pSelectBitmap
) handle
= dc
->funcs
->pSelectBitmap( dc
->physDev
, handle
);
579 dc
->hBitmap
= handle
;
580 dc
->flags
&= ~DC_DIRTY
;
581 SetRectRgn( dc
->hVisRgn
, 0, 0, bitmap
->bitmap
.bmWidth
, bitmap
->bitmap
.bmHeight
);
587 GDI_ReleaseObj( hdc
);
592 /***********************************************************************
593 * BITMAP_DeleteObject
595 static BOOL
BITMAP_DeleteObject( HGDIOBJ handle
, void *obj
)
597 BITMAPOBJ
* bmp
= obj
;
599 if (bmp
->funcs
&& bmp
->funcs
->pDeleteBitmap
)
600 bmp
->funcs
->pDeleteBitmap( handle
);
602 HeapFree( GetProcessHeap(), 0, bmp
->bitmap
.bmBits
);
606 DIBSECTION
*dib
= bmp
->dib
;
608 if (dib
->dsBm
.bmBits
)
612 SYSTEM_INFO SystemInfo
;
613 GetSystemInfo( &SystemInfo
);
614 UnmapViewOfFile( (char *)dib
->dsBm
.bmBits
-
615 (dib
->dsOffset
% SystemInfo
.dwAllocationGranularity
) );
617 else if (!dib
->dsOffset
)
618 VirtualFree(dib
->dsBm
.bmBits
, 0L, MEM_RELEASE
);
620 HeapFree(GetProcessHeap(), 0, dib
);
622 if (bmp
->segptr_bits
)
623 { /* free its selector array */
624 WORD sel
= SELECTOROF(bmp
->segptr_bits
);
625 WORD count
= (GetSelectorLimit16(sel
) / 0x10000) + 1;
628 for (i
= 0; i
< count
; i
++) FreeSelector16(sel
+ (i
<< __AHSHIFT
));
631 return GDI_FreeObject( handle
, obj
);
635 /***********************************************************************
638 static INT
BITMAP_GetObject16( HGDIOBJ handle
, void *obj
, INT count
, LPVOID buffer
)
640 BITMAPOBJ
*bmp
= obj
;
644 if ( count
<= sizeof(BITMAP16
) )
646 BITMAP
*bmp32
= &bmp
->dib
->dsBm
;
648 bmp16
.bmType
= bmp32
->bmType
;
649 bmp16
.bmWidth
= bmp32
->bmWidth
;
650 bmp16
.bmHeight
= bmp32
->bmHeight
;
651 bmp16
.bmWidthBytes
= bmp32
->bmWidthBytes
;
652 bmp16
.bmPlanes
= bmp32
->bmPlanes
;
653 bmp16
.bmBitsPixel
= bmp32
->bmBitsPixel
;
654 bmp16
.bmBits
= (SEGPTR
)0;
655 memcpy( buffer
, &bmp16
, count
);
660 FIXME("not implemented for DIBs: count %d\n", count
);
667 bmp16
.bmType
= bmp
->bitmap
.bmType
;
668 bmp16
.bmWidth
= bmp
->bitmap
.bmWidth
;
669 bmp16
.bmHeight
= bmp
->bitmap
.bmHeight
;
670 bmp16
.bmWidthBytes
= bmp
->bitmap
.bmWidthBytes
;
671 bmp16
.bmPlanes
= bmp
->bitmap
.bmPlanes
;
672 bmp16
.bmBitsPixel
= bmp
->bitmap
.bmBitsPixel
;
673 bmp16
.bmBits
= (SEGPTR
)0;
674 if (count
< sizeof(bmp16
)) return 0;
675 memcpy( buffer
, &bmp16
, sizeof(bmp16
) );
676 return sizeof(bmp16
);
681 /***********************************************************************
684 static INT
BITMAP_GetObject( HGDIOBJ handle
, void *obj
, INT count
, LPVOID buffer
)
686 BITMAPOBJ
*bmp
= obj
;
688 if( !buffer
) return sizeof(BITMAP
);
689 if (count
< sizeof(BITMAP
)) return 0;
693 if (count
>= sizeof(DIBSECTION
))
695 memcpy( buffer
, bmp
->dib
, sizeof(DIBSECTION
) );
696 return sizeof(DIBSECTION
);
698 else /* if (count >= sizeof(BITMAP)) */
700 DIBSECTION
*dib
= bmp
->dib
;
701 memcpy( buffer
, &dib
->dsBm
, sizeof(BITMAP
) );
702 return sizeof(BITMAP
);
707 memcpy( buffer
, &bmp
->bitmap
, sizeof(BITMAP
) );
708 return sizeof(BITMAP
);
713 /******************************************************************************
714 * CreateDiscardableBitmap [GDI32.@]
716 * Creates a discardable bitmap.
719 * Success: Handle to bitmap
722 HBITMAP WINAPI
CreateDiscardableBitmap(
723 HDC hdc
, /* [in] Handle to device context */
724 INT width
, /* [in] Bitmap width */
725 INT height
) /* [in] Bitmap height */
727 return CreateCompatibleBitmap( hdc
, width
, height
);
731 /******************************************************************************
732 * GetBitmapDimensionEx [GDI32.@]
734 * Retrieves dimensions of a bitmap.
740 BOOL WINAPI
GetBitmapDimensionEx(
741 HBITMAP hbitmap
, /* [in] Handle to bitmap */
742 LPSIZE size
) /* [out] Address of struct receiving dimensions */
744 BITMAPOBJ
* bmp
= (BITMAPOBJ
*) GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
);
745 if (!bmp
) return FALSE
;
747 GDI_ReleaseObj( hbitmap
);
752 /******************************************************************************
753 * SetBitmapDimensionEx [GDI32.@]
755 * Assigns dimensions to a bitmap.
756 * MSDN says that this function will fail if hbitmap is a handle created by
757 * CreateDIBSection, but that's not true on Windows 2000.
763 BOOL WINAPI
SetBitmapDimensionEx(
764 HBITMAP hbitmap
, /* [in] Handle to bitmap */
765 INT x
, /* [in] Bitmap width */
766 INT y
, /* [in] Bitmap height */
767 LPSIZE prevSize
) /* [out] Address of structure for orig dims */
769 BITMAPOBJ
* bmp
= (BITMAPOBJ
*) GDI_GetObjPtr( hbitmap
, BITMAP_MAGIC
);
770 if (!bmp
) return FALSE
;
771 if (prevSize
) *prevSize
= bmp
->size
;
774 GDI_ReleaseObj( hbitmap
);