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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
29 #include "gdi_private.h"
30 #include "wine/debug.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
35 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc );
36 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
37 static BOOL BITMAP_DeleteObject( HGDIOBJ handle );
39 static const struct gdi_obj_funcs bitmap_funcs =
41 BITMAP_SelectObject, /* pSelectObject */
42 BITMAP_GetObject, /* pGetObjectA */
43 BITMAP_GetObject, /* pGetObjectW */
44 NULL, /* pUnrealizeObject */
45 BITMAP_DeleteObject /* pDeleteObject */
49 /***********************************************************************
50 * null driver fallback implementations
53 DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
54 struct gdi_image_bits *bits, struct bitblt_coords *src )
59 if (!hbitmap) return ERROR_NOT_SUPPORTED;
60 if (!(bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return ERROR_INVALID_HANDLE;
62 if (bmp->bitmap.bmBits || !bits)
64 ret = dib_driver.pGetImage( 0, hbitmap, info, bits, src );
66 else if (!(ret = dib_driver.pGetImage( 0, hbitmap, info, NULL, src )))
68 info->bmiHeader.biHeight = -(src->visrect.bottom - src->visrect.top);
69 info->bmiHeader.biSizeImage = get_dib_image_size( info );
71 /* make the source rectangle relative to the returned bits */
72 src->y -= src->visrect.top;
73 offset_rect( &src->visrect, 0, -src->visrect.top );
75 /* return all-zero bits */
76 bits->ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, info->bmiHeader.biSizeImage );
78 bits->free = free_heap_bits;
80 GDI_ReleaseObj( hbitmap );
84 DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info,
85 const struct gdi_image_bits *bits, struct bitblt_coords *src,
86 struct bitblt_coords *dst, DWORD rop )
90 if (!hbitmap) return ERROR_SUCCESS;
94 if (!(bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return ERROR_INVALID_HANDLE;
95 if (!bmp->bitmap.bmBits)
97 int width_bytes = get_dib_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
98 if (!(bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
99 bmp->bitmap.bmHeight * width_bytes )))
101 GDI_ReleaseObj( hbitmap );
102 return ERROR_OUTOFMEMORY;
105 GDI_ReleaseObj( hbitmap );
107 return dib_driver.pPutImage( NULL, hbitmap, clip, info, bits, src, dst, rop );
111 /******************************************************************************
112 * CreateBitmap [GDI32.@]
114 * Creates a bitmap with the specified info.
117 * width [I] bitmap width
118 * height [I] bitmap height
119 * planes [I] Number of color planes
120 * bpp [I] Number of bits to identify a color
121 * bits [I] Pointer to array containing color data
124 * Success: Handle to bitmap
127 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
128 UINT bpp, LPCVOID bits )
134 bm.bmHeight = height;
135 bm.bmWidthBytes = get_bitmap_stride( width, bpp );
136 bm.bmPlanes = planes;
137 bm.bmBitsPixel = bpp;
138 bm.bmBits = (LPVOID)bits;
140 return CreateBitmapIndirect( &bm );
143 /******************************************************************************
144 * CreateCompatibleBitmap [GDI32.@]
146 * Creates a bitmap compatible with the DC.
149 * hdc [I] Handle to device context
150 * width [I] Width of bitmap
151 * height [I] Height of bitmap
154 * Success: Handle to bitmap
157 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
161 TRACE("(%p,%d,%d) =\n", hdc, width, height);
163 if (GetObjectType( hdc ) != OBJ_MEMDC)
165 hbmpRet = CreateBitmap(width, height,
166 GetDeviceCaps(hdc, PLANES),
167 GetDeviceCaps(hdc, BITSPIXEL),
173 HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
174 INT size = GetObjectW( bitmap, sizeof(dib), &dib );
178 if (size == sizeof(BITMAP))
180 /* A device-dependent bitmap is selected in the DC */
181 hbmpRet = CreateBitmap(width, height,
183 dib.dsBm.bmBitsPixel,
188 /* A DIB section is selected in the DC */
192 /* Allocate memory for a BITMAPINFOHEADER structure and a
193 color table. The maximum number of colors in a color table
194 is 256 which corresponds to a bitmap with depth 8.
195 Bitmaps with higher depths don't have color tables. */
196 bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
200 bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
201 bi->bmiHeader.biWidth = width;
202 bi->bmiHeader.biHeight = height;
203 bi->bmiHeader.biPlanes = dib.dsBmih.biPlanes;
204 bi->bmiHeader.biBitCount = dib.dsBmih.biBitCount;
205 bi->bmiHeader.biCompression = dib.dsBmih.biCompression;
206 bi->bmiHeader.biSizeImage = 0;
207 bi->bmiHeader.biXPelsPerMeter = dib.dsBmih.biXPelsPerMeter;
208 bi->bmiHeader.biYPelsPerMeter = dib.dsBmih.biYPelsPerMeter;
209 bi->bmiHeader.biClrUsed = dib.dsBmih.biClrUsed;
210 bi->bmiHeader.biClrImportant = dib.dsBmih.biClrImportant;
212 if (bi->bmiHeader.biCompression == BI_BITFIELDS)
214 /* Copy the color masks */
215 CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
217 else if (bi->bmiHeader.biBitCount <= 8)
219 /* Copy the color table */
220 GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
223 hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
224 HeapFree(GetProcessHeap(), 0, bi);
229 TRACE("\t\t%p\n", hbmpRet);
234 /******************************************************************************
235 * CreateBitmapIndirect [GDI32.@]
237 * Creates a bitmap with the specified info.
240 * bmp [I] Pointer to the bitmap info describing the bitmap
243 * Success: Handle to bitmap
244 * Failure: NULL. Use GetLastError() to determine the cause.
247 * If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
249 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
255 if (!bmp || bmp->bmType)
257 SetLastError( ERROR_INVALID_PARAMETER );
261 if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
263 SetLastError( ERROR_INVALID_PARAMETER );
269 if (!bm.bmWidth || !bm.bmHeight)
271 return GetStockObject( DEFAULT_BITMAP );
276 bm.bmHeight = -bm.bmHeight;
278 bm.bmWidth = -bm.bmWidth;
281 if (bm.bmPlanes != 1)
283 FIXME("planes = %d\n", bm.bmPlanes);
284 SetLastError( ERROR_INVALID_PARAMETER );
288 /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
289 if(bm.bmBitsPixel == 1) bm.bmBitsPixel = 1;
290 else if(bm.bmBitsPixel <= 4) bm.bmBitsPixel = 4;
291 else if(bm.bmBitsPixel <= 8) bm.bmBitsPixel = 8;
292 else if(bm.bmBitsPixel <= 16) bm.bmBitsPixel = 16;
293 else if(bm.bmBitsPixel <= 24) bm.bmBitsPixel = 24;
294 else if(bm.bmBitsPixel <= 32) bm.bmBitsPixel = 32;
296 WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
297 SetLastError(ERROR_INVALID_PARAMETER);
301 /* Windows ignores the provided bm.bmWidthBytes */
302 bm.bmWidthBytes = get_bitmap_stride( bm.bmWidth, bm.bmBitsPixel );
303 /* XP doesn't allow to create bitmaps larger than 128 Mb */
304 if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
306 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
310 /* Create the BITMAPOBJ */
311 if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
313 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
320 bmpobj->bitmap.bmBits = NULL;
321 bmpobj->funcs = &null_driver;
323 bmpobj->color_table = NULL;
324 bmpobj->nb_colors = 0;
326 if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
328 HeapFree( GetProcessHeap(), 0, bmpobj );
333 SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
335 TRACE("%dx%d, %d colors returning %p\n", bm.bmWidth, bm.bmHeight,
336 1 << (bm.bmPlanes * bm.bmBitsPixel), hbitmap);
342 /* convenience wrapper for GetImage to retrieve the full contents of a bitmap */
343 BOOL get_bitmap_image( HBITMAP hbitmap, BITMAPINFO *info, struct gdi_image_bits *bits )
345 struct bitblt_coords src;
347 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
351 src.visrect.left = src.x = 0;
352 src.visrect.top = src.y = 0;
353 src.visrect.right = src.width = bmp->bitmap.bmWidth;
354 src.visrect.bottom = src.height = bmp->bitmap.bmHeight;
355 ret = !bmp->funcs->pGetImage( NULL, hbitmap, info, bits, &src );
356 GDI_ReleaseObj( hbitmap );
362 /***********************************************************************
363 * GetBitmapBits [GDI32.@]
365 * Copies bitmap bits of bitmap to buffer.
368 * Success: Number of bytes copied
371 LONG WINAPI GetBitmapBits(
372 HBITMAP hbitmap, /* [in] Handle to bitmap */
373 LONG count, /* [in] Number of bytes to copy */
374 LPVOID bits) /* [out] Pointer to buffer to receive bits */
376 char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
377 BITMAPINFO *info = (BITMAPINFO *)buffer;
378 struct gdi_image_bits src_bits;
379 struct bitblt_coords src;
380 int dst_stride, max, ret;
381 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
382 const struct gdi_dc_funcs *funcs;
385 funcs = get_bitmap_funcs( bmp );
387 if (bmp->dib) dst_stride = get_bitmap_stride( bmp->dib->dsBmih.biWidth, bmp->dib->dsBmih.biBitCount );
388 else dst_stride = get_bitmap_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
390 ret = max = dst_stride * bmp->bitmap.bmHeight;
391 if (!bits) goto done;
392 if (count > max) count = max;
395 src.visrect.left = 0;
396 src.visrect.right = bmp->bitmap.bmWidth;
398 src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
400 src.width = src.visrect.right - src.visrect.left;
401 src.height = src.visrect.bottom - src.visrect.top;
403 if (!funcs->pGetImage( NULL, hbitmap, info, &src_bits, &src ))
405 const char *src_ptr = src_bits.ptr;
406 int src_stride = get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
408 /* GetBitmapBits returns 16-bit aligned data */
410 if (info->bmiHeader.biHeight > 0)
412 src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
413 src_stride = -src_stride;
415 src_ptr += src.visrect.top * src_stride;
417 if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
418 else while (count > 0)
420 memcpy( bits, src_ptr, min( count, dst_stride ) );
421 src_ptr += src_stride;
422 bits = (char *)bits + dst_stride;
425 if (src_bits.free) src_bits.free( &src_bits );
430 GDI_ReleaseObj( hbitmap );
435 /******************************************************************************
436 * SetBitmapBits [GDI32.@]
438 * Sets bits of color data for a bitmap.
441 * Success: Number of bytes used in setting the bitmap bits
444 LONG WINAPI SetBitmapBits(
445 HBITMAP hbitmap, /* [in] Handle to bitmap */
446 LONG count, /* [in] Number of bytes in bitmap array */
447 LPCVOID bits) /* [in] Address of array with bitmap bits */
449 char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
450 BITMAPINFO *info = (BITMAPINFO *)buffer;
453 int i, src_stride, dst_stride;
454 struct bitblt_coords src, dst;
455 struct gdi_image_bits src_bits;
457 const struct gdi_dc_funcs *funcs;
461 bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
464 funcs = get_bitmap_funcs( bmp );
467 WARN("(%d): Negative number of bytes passed???\n", count );
471 if (bmp->dib) src_stride = get_bitmap_stride( bmp->dib->dsBmih.biWidth, bmp->dib->dsBmih.biBitCount );
472 else src_stride = get_bitmap_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
473 count = min( count, src_stride * bmp->bitmap.bmHeight );
475 dst_stride = get_dib_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
477 src.visrect.left = src.x = 0;
478 src.visrect.top = src.y = 0;
479 src.visrect.right = src.width = bmp->bitmap.bmWidth;
480 src.visrect.bottom = src.height = (count + src_stride - 1 ) / src_stride;
483 if (count % src_stride)
486 int extra_pixels = ((count % src_stride) << 3) / bmp->bitmap.bmBitsPixel;
488 if ((count % src_stride << 3) % bmp->bitmap.bmBitsPixel)
489 FIXME( "Unhandled partial pixel\n" );
490 clip = CreateRectRgn( src.visrect.left, src.visrect.top,
491 src.visrect.right, src.visrect.bottom - 1 );
492 last_row = CreateRectRgn( src.visrect.left, src.visrect.bottom - 1,
493 src.visrect.left + extra_pixels, src.visrect.bottom );
494 CombineRgn( clip, clip, last_row, RGN_OR );
495 DeleteObject( last_row );
498 TRACE("(%p, %d, %p) %dx%d %d bpp fetched height: %d\n",
499 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
500 bmp->bitmap.bmBitsPixel, src.height );
502 if (src_stride == dst_stride)
504 src_bits.ptr = (void *)bits;
505 src_bits.is_copy = FALSE;
506 src_bits.free = NULL;
510 if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
512 GDI_ReleaseObj( hbitmap );
515 src_bits.is_copy = TRUE;
516 src_bits.free = free_heap_bits;
517 for (i = 0; i < count / src_stride; i++)
518 memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, src_stride );
519 if (count % src_stride)
520 memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, count % src_stride );
523 /* query the color info */
524 info->bmiHeader.biSize = sizeof(info->bmiHeader);
525 info->bmiHeader.biPlanes = 1;
526 info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
527 info->bmiHeader.biCompression = BI_RGB;
528 info->bmiHeader.biXPelsPerMeter = 0;
529 info->bmiHeader.biYPelsPerMeter = 0;
530 info->bmiHeader.biClrUsed = 0;
531 info->bmiHeader.biClrImportant = 0;
532 info->bmiHeader.biWidth = 0;
533 info->bmiHeader.biHeight = 0;
534 info->bmiHeader.biSizeImage = 0;
535 err = funcs->pPutImage( NULL, hbitmap, 0, info, NULL, NULL, NULL, SRCCOPY );
537 if (!err || err == ERROR_BAD_FORMAT)
539 info->bmiHeader.biPlanes = 1;
540 info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
541 info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
542 info->bmiHeader.biHeight = -dst.height;
543 info->bmiHeader.biSizeImage = dst.height * dst_stride;
544 err = funcs->pPutImage( NULL, hbitmap, clip, info, &src_bits, &src, &dst, SRCCOPY );
548 if (clip) DeleteObject( clip );
549 if (src_bits.free) src_bits.free( &src_bits );
550 GDI_ReleaseObj( hbitmap );
554 /**********************************************************************
558 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
562 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
572 GDI_ReleaseObj( hbitmap );
573 dc = CreateCompatibleDC( NULL );
576 if (!(bi = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET( BITMAPINFO, bmiColors[256] ))))
581 bi->bmiHeader = dib.dsBmih;
583 /* Get the color table or the color masks */
584 GetDIBits( dc, hbitmap, 0, 0, NULL, bi, DIB_RGB_COLORS );
585 bi->bmiHeader.biHeight = dib.dsBmih.biHeight;
587 res = CreateDIBSection( dc, bi, DIB_RGB_COLORS, &bits, NULL, 0 );
588 if (res) SetDIBits( dc, res, 0, dib.dsBm.bmHeight, dib.dsBm.bmBits, bi, DIB_RGB_COLORS );
589 HeapFree( GetProcessHeap(), 0, bi );
593 dib.dsBm = bmp->bitmap;
594 dib.dsBm.bmBits = NULL;
595 GDI_ReleaseObj( hbitmap );
597 res = CreateBitmapIndirect( &dib.dsBm );
599 char *buf = HeapAlloc( GetProcessHeap(), 0, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight );
600 GetBitmapBits (hbitmap, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
601 SetBitmapBits (res, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
602 HeapFree( GetProcessHeap(), 0, buf );
608 static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
610 char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
611 BITMAPINFO *info = (BITMAPINFO *)buffer;
613 if (!bmp->bitmap.bmBits) return;
614 if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
616 get_ddb_bitmapinfo( bmp, info );
617 SetDIBits( 0, hbitmap, 0, bmp->bitmap.bmHeight, bmp->bitmap.bmBits, info, DIB_RGB_COLORS );
618 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
619 bmp->bitmap.bmBits = NULL;
622 /***********************************************************************
625 * Set the type of DC that owns the bitmap. This is used when the
626 * bitmap is selected into a device to initialize the bitmap function
629 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
634 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
635 if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
637 if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
639 if (!bitmap->dib && bitmap->funcs != physdev->funcs)
641 /* we can only change from the null driver to some other driver */
642 if (bitmap->funcs == &null_driver)
644 if (physdev->funcs->pCreateBitmap)
646 ret = physdev->funcs->pCreateBitmap( physdev, hbitmap );
649 bitmap->funcs = physdev->funcs;
650 set_initial_bitmap_bits( hbitmap, bitmap );
655 WARN( "Trying to select bitmap %p in DC that doesn't support it\n", hbitmap );
661 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
665 GDI_ReleaseObj( hbitmap );
670 /***********************************************************************
671 * BITMAP_SelectObject
673 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
678 PHYSDEV physdev = NULL, old_physdev = NULL;
680 if (!(dc = get_dc_ptr( hdc ))) return 0;
682 if (GetObjectType( hdc ) != OBJ_MEMDC)
688 if (handle == dc->hBitmap) goto done; /* nothing to do */
690 if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
696 if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
698 WARN( "Bitmap already selected in another DC\n" );
699 GDI_ReleaseObj( handle );
704 old_physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
705 if(old_physdev == dc->dibdrv)
706 old_physdev = pop_dc_driver( &dc->physDev );
710 physdev = dc->dibdrv;
711 if (physdev) push_dc_driver( &dc->physDev, physdev, physdev->funcs );
714 if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )) goto done;
715 dc->dibdrv = physdev = dc->physDev;
719 physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
721 if (!BITMAP_SetOwnerDC( handle, physdev ))
723 GDI_ReleaseObj( handle );
727 if (!physdev->funcs->pSelectBitmap( physdev, handle ))
729 GDI_ReleaseObj( handle );
734 dc->hBitmap = handle;
735 GDI_inc_ref_count( handle );
737 dc->vis_rect.left = 0;
738 dc->vis_rect.top = 0;
739 dc->vis_rect.right = bitmap->bitmap.bmWidth;
740 dc->vis_rect.bottom = bitmap->bitmap.bmHeight;
741 SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
742 GDI_ReleaseObj( handle );
744 GDI_dec_ref_count( ret );
750 if (physdev && physdev == dc->dibdrv)
751 pop_dc_driver( &dc->physDev );
752 if (old_physdev && old_physdev == dc->dibdrv)
753 push_dc_driver( &dc->physDev, old_physdev, old_physdev->funcs );
755 release_dc_ptr( dc );
760 /***********************************************************************
761 * BITMAP_DeleteObject
763 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
765 const DC_FUNCTIONS *funcs;
766 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
768 if (!bmp) return FALSE;
770 GDI_ReleaseObj( handle );
772 funcs->pDeleteBitmap( handle );
774 if (!(bmp = free_gdi_handle( handle ))) return FALSE;
776 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
780 DIBSECTION *dib = bmp->dib;
782 if (dib->dsBm.bmBits)
786 SYSTEM_INFO SystemInfo;
787 GetSystemInfo( &SystemInfo );
788 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
789 (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
791 else if (!dib->dsOffset)
792 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
794 HeapFree(GetProcessHeap(), 0, dib);
795 HeapFree(GetProcessHeap(), 0, bmp->color_table);
797 return HeapFree( GetProcessHeap(), 0, bmp );
801 /***********************************************************************
804 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
807 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
811 if (!buffer) ret = sizeof(BITMAP);
812 else if (count < sizeof(BITMAP)) ret = 0;
815 if (count >= sizeof(DIBSECTION))
817 DIBSECTION *dib = buffer;
819 dib->dsBmih.biHeight = abs( dib->dsBmih.biHeight );
820 ret = sizeof(DIBSECTION);
822 else /* if (count >= sizeof(BITMAP)) */
824 DIBSECTION *dib = bmp->dib;
825 memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
826 ret = sizeof(BITMAP);
831 memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
832 ((BITMAP *) buffer)->bmBits = NULL;
833 ret = sizeof(BITMAP);
835 GDI_ReleaseObj( handle );
840 /******************************************************************************
841 * CreateDiscardableBitmap [GDI32.@]
843 * Creates a discardable bitmap.
846 * Success: Handle to bitmap
849 HBITMAP WINAPI CreateDiscardableBitmap(
850 HDC hdc, /* [in] Handle to device context */
851 INT width, /* [in] Bitmap width */
852 INT height) /* [in] Bitmap height */
854 return CreateCompatibleBitmap( hdc, width, height );
858 /******************************************************************************
859 * GetBitmapDimensionEx [GDI32.@]
861 * Retrieves dimensions of a bitmap.
867 BOOL WINAPI GetBitmapDimensionEx(
868 HBITMAP hbitmap, /* [in] Handle to bitmap */
869 LPSIZE size) /* [out] Address of struct receiving dimensions */
871 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
872 if (!bmp) return FALSE;
874 GDI_ReleaseObj( hbitmap );
879 /******************************************************************************
880 * SetBitmapDimensionEx [GDI32.@]
882 * Assigns dimensions to a bitmap.
883 * MSDN says that this function will fail if hbitmap is a handle created by
884 * CreateDIBSection, but that's not true on Windows 2000.
890 BOOL WINAPI SetBitmapDimensionEx(
891 HBITMAP hbitmap, /* [in] Handle to bitmap */
892 INT x, /* [in] Bitmap width */
893 INT y, /* [in] Bitmap height */
894 LPSIZE prevSize) /* [out] Address of structure for orig dims */
896 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
897 if (!bmp) return FALSE;
898 if (prevSize) *prevSize = bmp->size;
901 GDI_ReleaseObj( hbitmap );