842 lines
24 KiB
C
842 lines
24 KiB
C
/*
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* GDI bitmap objects
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*
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* Copyright 1993 Alexandre Julliard
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* 1998 Huw D M Davies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "gdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
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static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc );
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static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
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static BOOL BITMAP_DeleteObject( HGDIOBJ handle );
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static const struct gdi_obj_funcs bitmap_funcs =
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{
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BITMAP_SelectObject, /* pSelectObject */
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BITMAP_GetObject, /* pGetObjectA */
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BITMAP_GetObject, /* pGetObjectW */
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NULL, /* pUnrealizeObject */
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BITMAP_DeleteObject /* pDeleteObject */
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};
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/***********************************************************************
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* null driver fallback implementations
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*/
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LONG nulldrv_GetBitmapBits( HBITMAP bitmap, void *bits, LONG size )
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{
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BITMAPOBJ *bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );
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if (bmp->bitmap.bmBits) memcpy( bits, bmp->bitmap.bmBits, size );
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else memset( bits, 0, size );
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GDI_ReleaseObj( bitmap );
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return size;
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}
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LONG nulldrv_SetBitmapBits( HBITMAP bitmap, const void *bits, LONG size )
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{
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BITMAPOBJ *bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );
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if (!bmp->bitmap.bmBits)
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{
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LONG total = bmp->bitmap.bmHeight * bmp->bitmap.bmWidthBytes; /* alloc enough for entire bitmap */
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if (!(bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, total )))
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{
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GDI_ReleaseObj( bitmap );
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return 0;
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}
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if (size < total) memset( (char *)bmp->bitmap.bmBits + size, 0, total - size );
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}
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memcpy( bmp->bitmap.bmBits, bits, size );
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GDI_ReleaseObj( bitmap );
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return size;
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}
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INT nulldrv_SetDIBits( PHYSDEV dev, HBITMAP bitmap, UINT start, UINT lines,
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const void *bits, const BITMAPINFO *info, UINT coloruse )
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{
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/* FIXME: transfer bits to bmp->bitmap.bmBits */
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return 0;
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}
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/***********************************************************************
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* BITMAP_GetWidthBytes
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*
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* Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
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* data.
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*/
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INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
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{
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switch(bpp)
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{
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case 1:
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return 2 * ((bmWidth+15) >> 4);
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case 24:
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bmWidth *= 3; /* fall through */
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case 8:
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return bmWidth + (bmWidth & 1);
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case 32:
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return bmWidth * 4;
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case 16:
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case 15:
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return bmWidth * 2;
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case 4:
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return 2 * ((bmWidth+3) >> 2);
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default:
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WARN("Unknown depth %d, please report.\n", bpp );
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}
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return -1;
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}
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/******************************************************************************
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* CreateBitmap [GDI32.@]
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*
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* Creates a bitmap with the specified info.
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*
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* PARAMS
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* width [I] bitmap width
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* height [I] bitmap height
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* planes [I] Number of color planes
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* bpp [I] Number of bits to identify a color
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* bits [I] Pointer to array containing color data
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: 0
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*/
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HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
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UINT bpp, LPCVOID bits )
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{
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BITMAP bm;
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bm.bmType = 0;
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bm.bmWidth = width;
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bm.bmHeight = height;
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bm.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
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bm.bmPlanes = planes;
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bm.bmBitsPixel = bpp;
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bm.bmBits = (LPVOID)bits;
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return CreateBitmapIndirect( &bm );
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}
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/******************************************************************************
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* CreateCompatibleBitmap [GDI32.@]
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*
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* Creates a bitmap compatible with the DC.
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*
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* PARAMS
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* hdc [I] Handle to device context
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* width [I] Width of bitmap
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* height [I] Height of bitmap
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: 0
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*/
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HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
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{
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HBITMAP hbmpRet = 0;
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TRACE("(%p,%d,%d) =\n", hdc, width, height);
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if (GetObjectType( hdc ) != OBJ_MEMDC)
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{
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hbmpRet = CreateBitmap(width, height,
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GetDeviceCaps(hdc, PLANES),
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GetDeviceCaps(hdc, BITSPIXEL),
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NULL);
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}
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else /* Memory DC */
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{
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DIBSECTION dib;
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HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
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INT size = GetObjectW( bitmap, sizeof(dib), &dib );
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if (!size) return 0;
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if (size == sizeof(BITMAP))
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{
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/* A device-dependent bitmap is selected in the DC */
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hbmpRet = CreateBitmap(width, height,
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dib.dsBm.bmPlanes,
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dib.dsBm.bmBitsPixel,
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NULL);
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}
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else
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{
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/* A DIB section is selected in the DC */
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BITMAPINFO *bi;
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void *bits;
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/* Allocate memory for a BITMAPINFOHEADER structure and a
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color table. The maximum number of colors in a color table
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is 256 which corresponds to a bitmap with depth 8.
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Bitmaps with higher depths don't have color tables. */
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bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
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if (bi)
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{
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bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
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bi->bmiHeader.biWidth = width;
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bi->bmiHeader.biHeight = height;
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bi->bmiHeader.biPlanes = dib.dsBmih.biPlanes;
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bi->bmiHeader.biBitCount = dib.dsBmih.biBitCount;
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bi->bmiHeader.biCompression = dib.dsBmih.biCompression;
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bi->bmiHeader.biSizeImage = 0;
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bi->bmiHeader.biXPelsPerMeter = dib.dsBmih.biXPelsPerMeter;
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bi->bmiHeader.biYPelsPerMeter = dib.dsBmih.biYPelsPerMeter;
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bi->bmiHeader.biClrUsed = dib.dsBmih.biClrUsed;
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bi->bmiHeader.biClrImportant = dib.dsBmih.biClrImportant;
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if (bi->bmiHeader.biCompression == BI_BITFIELDS)
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{
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/* Copy the color masks */
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CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
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}
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else if (bi->bmiHeader.biBitCount <= 8)
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{
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/* Copy the color table */
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GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
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}
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hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
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HeapFree(GetProcessHeap(), 0, bi);
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}
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}
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}
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TRACE("\t\t%p\n", hbmpRet);
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return hbmpRet;
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}
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/******************************************************************************
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* CreateBitmapIndirect [GDI32.@]
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*
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* Creates a bitmap with the specified info.
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*
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* PARAMS
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* bmp [I] Pointer to the bitmap info describing the bitmap
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: NULL. Use GetLastError() to determine the cause.
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*
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* NOTES
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* If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
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*/
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HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
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{
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BITMAP bm;
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BITMAPOBJ *bmpobj;
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HBITMAP hbitmap;
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if (!bmp || bmp->bmType)
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return NULL;
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}
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if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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bm = *bmp;
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if (!bm.bmWidth || !bm.bmHeight)
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{
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return GetStockObject( DEFAULT_BITMAP );
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}
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else
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{
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if (bm.bmHeight < 0)
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bm.bmHeight = -bm.bmHeight;
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if (bm.bmWidth < 0)
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bm.bmWidth = -bm.bmWidth;
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}
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if (bm.bmPlanes != 1)
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{
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FIXME("planes = %d\n", bm.bmPlanes);
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SetLastError( ERROR_INVALID_PARAMETER );
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return NULL;
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}
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/* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
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if(bm.bmBitsPixel == 1) bm.bmBitsPixel = 1;
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else if(bm.bmBitsPixel <= 4) bm.bmBitsPixel = 4;
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else if(bm.bmBitsPixel <= 8) bm.bmBitsPixel = 8;
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else if(bm.bmBitsPixel <= 16) bm.bmBitsPixel = 16;
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else if(bm.bmBitsPixel <= 24) bm.bmBitsPixel = 24;
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else if(bm.bmBitsPixel <= 32) bm.bmBitsPixel = 32;
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else {
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WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
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SetLastError(ERROR_INVALID_PARAMETER);
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return NULL;
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}
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/* Windows ignores the provided bm.bmWidthBytes */
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bm.bmWidthBytes = BITMAP_GetWidthBytes( bm.bmWidth, bm.bmBitsPixel );
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/* XP doesn't allow to create bitmaps larger than 128 Mb */
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if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
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{
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return 0;
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}
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/* Create the BITMAPOBJ */
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if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
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{
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return 0;
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}
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bmpobj->size.cx = 0;
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bmpobj->size.cy = 0;
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bmpobj->bitmap = bm;
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bmpobj->bitmap.bmBits = NULL;
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bmpobj->funcs = &null_driver;
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bmpobj->dib = NULL;
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bmpobj->color_table = NULL;
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bmpobj->nb_colors = 0;
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if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
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{
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HeapFree( GetProcessHeap(), 0, bmpobj );
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return 0;
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}
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if (bm.bmBits)
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SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
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TRACE("%dx%d, %d colors returning %p\n", bm.bmWidth, bm.bmHeight,
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1 << (bm.bmPlanes * bm.bmBitsPixel), hbitmap);
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return hbitmap;
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}
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/***********************************************************************
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* GetBitmapBits [GDI32.@]
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*
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* Copies bitmap bits of bitmap to buffer.
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*
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* RETURNS
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* Success: Number of bytes copied
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* Failure: 0
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*/
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LONG WINAPI GetBitmapBits(
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HBITMAP hbitmap, /* [in] Handle to bitmap */
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LONG count, /* [in] Number of bytes to copy */
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LPVOID bits) /* [out] Pointer to buffer to receive bits */
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{
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BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
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LONG height, ret;
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if (!bmp) return 0;
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if (bmp->dib) /* simply copy the bits from the DIB */
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{
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DIBSECTION *dib = bmp->dib;
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const char *src = dib->dsBm.bmBits;
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INT width_bytes = BITMAP_GetWidthBytes(dib->dsBm.bmWidth, dib->dsBm.bmBitsPixel);
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LONG max = width_bytes * bmp->bitmap.bmHeight;
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if (!bits)
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{
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ret = max;
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goto done;
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}
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if (count > max) count = max;
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ret = count;
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/* GetBitmapBits returns not 32-bit aligned data */
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if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
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{
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src += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
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while (count > 0)
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{
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src -= dib->dsBm.bmWidthBytes;
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memcpy( bits, src, min( count, width_bytes ) );
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bits = (char *)bits + width_bytes;
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count -= width_bytes;
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}
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}
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else
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{
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while (count > 0)
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{
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memcpy( bits, src, min( count, width_bytes ) );
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src += dib->dsBm.bmWidthBytes;
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bits = (char *)bits + width_bytes;
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count -= width_bytes;
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}
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}
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goto done;
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}
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/* If the bits vector is null, the function should return the read size */
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if(bits == NULL)
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{
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ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
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goto done;
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}
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if (count < 0) {
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WARN("(%d): Negative number of bytes passed???\n", count );
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count = -count;
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}
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/* Only get entire lines */
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height = count / bmp->bitmap.bmWidthBytes;
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if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
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count = height * bmp->bitmap.bmWidthBytes;
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if (count == 0)
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{
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WARN("Less than one entire line requested\n");
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ret = 0;
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goto done;
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}
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TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
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hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
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1 << bmp->bitmap.bmBitsPixel, height );
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ret = bmp->funcs->pGetBitmapBits( hbitmap, bits, count );
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done:
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/******************************************************************************
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* SetBitmapBits [GDI32.@]
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*
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* Sets bits of color data for a bitmap.
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*
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* RETURNS
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* Success: Number of bytes used in setting the bitmap bits
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* Failure: 0
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*/
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LONG WINAPI SetBitmapBits(
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HBITMAP hbitmap, /* [in] Handle to bitmap */
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LONG count, /* [in] Number of bytes in bitmap array */
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LPCVOID bits) /* [in] Address of array with bitmap bits */
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{
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BITMAPOBJ *bmp;
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LONG height, ret;
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if (!bits) return 0;
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bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
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if (!bmp) return 0;
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if (count < 0) {
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WARN("(%d): Negative number of bytes passed???\n", count );
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count = -count;
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}
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if (bmp->dib) /* simply copy the bits into the DIB */
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{
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DIBSECTION *dib = bmp->dib;
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char *dest = dib->dsBm.bmBits;
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LONG max = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
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if (count > max) count = max;
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ret = count;
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if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
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{
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dest += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
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while (count > 0)
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{
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dest -= dib->dsBm.bmWidthBytes;
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memcpy( dest, bits, min( count, dib->dsBm.bmWidthBytes ) );
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bits = (const char *)bits + dib->dsBm.bmWidthBytes;
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count -= dib->dsBm.bmWidthBytes;
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}
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}
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else memcpy( dest, bits, count );
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/* Only get entire lines */
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height = count / bmp->bitmap.bmWidthBytes;
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if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
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count = height * bmp->bitmap.bmWidthBytes;
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TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
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hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
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1 << bmp->bitmap.bmBitsPixel, height );
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ret = bmp->funcs->pSetBitmapBits( hbitmap, bits, count );
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/**********************************************************************
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* BITMAP_CopyBitmap
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*
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*/
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HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
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{
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HBITMAP res;
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DIBSECTION dib;
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BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
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if (!bmp) return 0;
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if (bmp->dib)
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{
|
|
void *bits;
|
|
BITMAPINFO *bi;
|
|
HDC dc;
|
|
|
|
dib = *bmp->dib;
|
|
GDI_ReleaseObj( hbitmap );
|
|
dc = CreateCompatibleDC( NULL );
|
|
|
|
if (!dc) return 0;
|
|
if (!(bi = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET( BITMAPINFO, bmiColors[256] ))))
|
|
{
|
|
DeleteDC( dc );
|
|
return 0;
|
|
}
|
|
bi->bmiHeader = dib.dsBmih;
|
|
|
|
/* Get the color table or the color masks */
|
|
GetDIBits( dc, hbitmap, 0, 0, NULL, bi, DIB_RGB_COLORS );
|
|
bi->bmiHeader.biHeight = dib.dsBmih.biHeight;
|
|
|
|
res = CreateDIBSection( dc, bi, DIB_RGB_COLORS, &bits, NULL, 0 );
|
|
if (res) SetDIBits( dc, res, 0, dib.dsBm.bmHeight, dib.dsBm.bmBits, bi, DIB_RGB_COLORS );
|
|
HeapFree( GetProcessHeap(), 0, bi );
|
|
DeleteDC( dc );
|
|
return res;
|
|
}
|
|
dib.dsBm = bmp->bitmap;
|
|
dib.dsBm.bmBits = NULL;
|
|
GDI_ReleaseObj( hbitmap );
|
|
|
|
res = CreateBitmapIndirect( &dib.dsBm );
|
|
if(res) {
|
|
char *buf = HeapAlloc( GetProcessHeap(), 0, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight );
|
|
GetBitmapBits (hbitmap, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
|
|
SetBitmapBits (res, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
|
|
HeapFree( GetProcessHeap(), 0, buf );
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_SetOwnerDC
|
|
*
|
|
* Set the type of DC that owns the bitmap. This is used when the
|
|
* bitmap is selected into a device to initialize the bitmap function
|
|
* table.
|
|
*/
|
|
BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
|
|
{
|
|
BITMAPOBJ *bitmap;
|
|
BOOL ret = TRUE;
|
|
|
|
/* never set the owner of the stock bitmap since it can be selected in multiple DCs */
|
|
if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
|
|
|
|
if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
|
|
|
|
if (!bitmap->dib && bitmap->funcs != physdev->funcs)
|
|
{
|
|
/* we can only change from the null driver to some other driver */
|
|
if (bitmap->funcs == &null_driver)
|
|
{
|
|
if (physdev->funcs->pCreateBitmap)
|
|
{
|
|
ret = physdev->funcs->pCreateBitmap( physdev, hbitmap, bitmap->bitmap.bmBits );
|
|
if (ret) bitmap->funcs = physdev->funcs;
|
|
}
|
|
else
|
|
{
|
|
WARN( "Trying to select bitmap %p in DC that doesn't support it\n", hbitmap );
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
GDI_ReleaseObj( hbitmap );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_SelectObject
|
|
*/
|
|
static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
|
|
{
|
|
HGDIOBJ ret;
|
|
BITMAPOBJ *bitmap;
|
|
DC *dc;
|
|
PHYSDEV physdev = NULL, old_physdev = NULL;
|
|
|
|
if (!(dc = get_dc_ptr( hdc ))) return 0;
|
|
|
|
if (GetObjectType( hdc ) != OBJ_MEMDC)
|
|
{
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
ret = dc->hBitmap;
|
|
if (handle == dc->hBitmap) goto done; /* nothing to do */
|
|
|
|
if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
|
|
{
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
|
|
if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
|
|
{
|
|
WARN( "Bitmap already selected in another DC\n" );
|
|
GDI_ReleaseObj( handle );
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
|
|
old_physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
|
|
if(old_physdev == &dc->dibdrv.dev)
|
|
pop_dc_driver( dc, old_physdev );
|
|
|
|
if(bitmap->dib)
|
|
{
|
|
physdev = &dc->dibdrv.dev;
|
|
push_dc_driver( dc, physdev, physdev->funcs );
|
|
}
|
|
else
|
|
physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
|
|
|
|
if (!BITMAP_SetOwnerDC( handle, physdev ))
|
|
{
|
|
GDI_ReleaseObj( handle );
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
if (!physdev->funcs->pSelectBitmap( physdev, handle ))
|
|
{
|
|
GDI_ReleaseObj( handle );
|
|
ret = 0;
|
|
}
|
|
else
|
|
{
|
|
dc->hBitmap = handle;
|
|
GDI_inc_ref_count( handle );
|
|
dc->dirty = 0;
|
|
dc->vis_rect.left = 0;
|
|
dc->vis_rect.top = 0;
|
|
dc->vis_rect.right = bitmap->bitmap.bmWidth;
|
|
dc->vis_rect.bottom = bitmap->bitmap.bmHeight;
|
|
SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
|
|
GDI_ReleaseObj( handle );
|
|
DC_InitDC( dc );
|
|
GDI_dec_ref_count( ret );
|
|
}
|
|
|
|
done:
|
|
if(!ret)
|
|
{
|
|
if(physdev == &dc->dibdrv.dev) pop_dc_driver( dc, physdev );
|
|
if(old_physdev == &dc->dibdrv.dev) push_dc_driver( dc, old_physdev, old_physdev->funcs );
|
|
}
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_DeleteObject
|
|
*/
|
|
static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
|
|
{
|
|
const DC_FUNCTIONS *funcs;
|
|
BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
|
|
|
|
if (!bmp) return FALSE;
|
|
funcs = bmp->funcs;
|
|
GDI_ReleaseObj( handle );
|
|
|
|
funcs->pDeleteBitmap( handle );
|
|
|
|
if (!(bmp = free_gdi_handle( handle ))) return FALSE;
|
|
|
|
HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
|
|
|
|
if (bmp->dib)
|
|
{
|
|
DIBSECTION *dib = bmp->dib;
|
|
|
|
if (dib->dsBm.bmBits)
|
|
{
|
|
if (dib->dshSection)
|
|
{
|
|
SYSTEM_INFO SystemInfo;
|
|
GetSystemInfo( &SystemInfo );
|
|
UnmapViewOfFile( (char *)dib->dsBm.bmBits -
|
|
(dib->dsOffset % SystemInfo.dwAllocationGranularity) );
|
|
}
|
|
else if (!dib->dsOffset)
|
|
VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
|
|
}
|
|
HeapFree(GetProcessHeap(), 0, dib);
|
|
HeapFree(GetProcessHeap(), 0, bmp->color_table);
|
|
}
|
|
return HeapFree( GetProcessHeap(), 0, bmp );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_GetObject
|
|
*/
|
|
static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
|
|
{
|
|
INT ret;
|
|
BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
|
|
|
|
if (!bmp) return 0;
|
|
|
|
if (!buffer) ret = sizeof(BITMAP);
|
|
else if (count < sizeof(BITMAP)) ret = 0;
|
|
else if (bmp->dib)
|
|
{
|
|
if (count >= sizeof(DIBSECTION))
|
|
{
|
|
DIBSECTION *dib = buffer;
|
|
*dib = *bmp->dib;
|
|
dib->dsBmih.biHeight = abs( dib->dsBmih.biHeight );
|
|
ret = sizeof(DIBSECTION);
|
|
}
|
|
else /* if (count >= sizeof(BITMAP)) */
|
|
{
|
|
DIBSECTION *dib = bmp->dib;
|
|
memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
|
|
ret = sizeof(BITMAP);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
|
|
((BITMAP *) buffer)->bmBits = NULL;
|
|
ret = sizeof(BITMAP);
|
|
}
|
|
GDI_ReleaseObj( handle );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* CreateDiscardableBitmap [GDI32.@]
|
|
*
|
|
* Creates a discardable bitmap.
|
|
*
|
|
* RETURNS
|
|
* Success: Handle to bitmap
|
|
* Failure: NULL
|
|
*/
|
|
HBITMAP WINAPI CreateDiscardableBitmap(
|
|
HDC hdc, /* [in] Handle to device context */
|
|
INT width, /* [in] Bitmap width */
|
|
INT height) /* [in] Bitmap height */
|
|
{
|
|
return CreateCompatibleBitmap( hdc, width, height );
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* GetBitmapDimensionEx [GDI32.@]
|
|
*
|
|
* Retrieves dimensions of a bitmap.
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE
|
|
* Failure: FALSE
|
|
*/
|
|
BOOL WINAPI GetBitmapDimensionEx(
|
|
HBITMAP hbitmap, /* [in] Handle to bitmap */
|
|
LPSIZE size) /* [out] Address of struct receiving dimensions */
|
|
{
|
|
BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
|
|
if (!bmp) return FALSE;
|
|
*size = bmp->size;
|
|
GDI_ReleaseObj( hbitmap );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* SetBitmapDimensionEx [GDI32.@]
|
|
*
|
|
* Assigns dimensions to a bitmap.
|
|
* MSDN says that this function will fail if hbitmap is a handle created by
|
|
* CreateDIBSection, but that's not true on Windows 2000.
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE
|
|
* Failure: FALSE
|
|
*/
|
|
BOOL WINAPI SetBitmapDimensionEx(
|
|
HBITMAP hbitmap, /* [in] Handle to bitmap */
|
|
INT x, /* [in] Bitmap width */
|
|
INT y, /* [in] Bitmap height */
|
|
LPSIZE prevSize) /* [out] Address of structure for orig dims */
|
|
{
|
|
BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
|
|
if (!bmp) return FALSE;
|
|
if (prevSize) *prevSize = bmp->size;
|
|
bmp->size.cx = x;
|
|
bmp->size.cy = y;
|
|
GDI_ReleaseObj( hbitmap );
|
|
return TRUE;
|
|
}
|