596 lines
17 KiB
C
596 lines
17 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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* 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 = get_bitmap_stride( 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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char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
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BITMAPINFO *bi = (BITMAPINFO *)buffer;
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DIBSECTION dib;
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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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return CreateBitmap( width, height,
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GetDeviceCaps(hdc, PLANES), GetDeviceCaps(hdc, BITSPIXEL), NULL );
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switch (GetObjectW( GetCurrentObject( hdc, OBJ_BITMAP ), sizeof(dib), &dib ))
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{
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case sizeof(BITMAP): /* A device-dependent bitmap is selected in the DC */
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return CreateBitmap( width, height, dib.dsBm.bmPlanes, dib.dsBm.bmBitsPixel, NULL );
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case sizeof(DIBSECTION): /* A DIB section is selected in the DC */
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bi->bmiHeader = dib.dsBmih;
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bi->bmiHeader.biWidth = width;
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bi->bmiHeader.biHeight = height;
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if (dib.dsBmih.biCompression == BI_BITFIELDS) /* copy the color masks */
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memcpy(bi->bmiColors, dib.dsBitfields, sizeof(dib.dsBitfields));
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else if (dib.dsBmih.biBitCount <= 8) /* copy the color table */
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GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
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return CreateDIBSection( hdc, bi, DIB_RGB_COLORS, NULL, NULL, 0 );
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default:
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return 0;
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}
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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 is 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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INT dib_stride;
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SIZE_T size;
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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 = get_bitmap_stride( bm.bmWidth, bm.bmBitsPixel );
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dib_stride = get_dib_stride( bm.bmWidth, bm.bmBitsPixel );
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size = dib_stride * bm.bmHeight;
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/* Check for overflow (dib_stride itself must be ok because of the constraint on bm.bmWidth above). */
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if (dib_stride != size / bm.bmHeight)
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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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/* Create the BITMAPOBJ */
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if (!(bmpobj = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 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->dib.dsBm = bm;
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bmpobj->dib.dsBm.bmBits = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size );
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if (!bmpobj->dib.dsBm.bmBits)
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{
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HeapFree( GetProcessHeap(), 0, bmpobj );
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return 0;
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}
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if (!(hbitmap = alloc_gdi_handle( bmpobj, OBJ_BITMAP, &bitmap_funcs )))
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{
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HeapFree( GetProcessHeap(), 0, bmpobj->dib.dsBm.bmBits );
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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, bpp %d planes %d: returning %p\n", bm.bmWidth, bm.bmHeight,
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bm.bmBitsPixel, bm.bmPlanes, 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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char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
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BITMAPINFO *info = (BITMAPINFO *)buffer;
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struct gdi_image_bits src_bits;
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struct bitblt_coords src;
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int dst_stride, max, ret;
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BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
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if (!bmp) return 0;
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dst_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
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ret = max = dst_stride * bmp->dib.dsBm.bmHeight;
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if (!bits) goto done;
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if (count < 0 || count > max) count = max;
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ret = count;
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src.visrect.left = 0;
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src.visrect.right = bmp->dib.dsBm.bmWidth;
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src.visrect.top = 0;
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src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
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src.x = src.y = 0;
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src.width = src.visrect.right - src.visrect.left;
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src.height = src.visrect.bottom - src.visrect.top;
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if (!get_image_from_bitmap( bmp, info, &src_bits, &src ))
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{
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const char *src_ptr = src_bits.ptr;
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int src_stride = info->bmiHeader.biSizeImage / abs( info->bmiHeader.biHeight );
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/* GetBitmapBits returns 16-bit aligned data */
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if (info->bmiHeader.biHeight > 0)
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{
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src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
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src_stride = -src_stride;
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}
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src_ptr += src.visrect.top * src_stride;
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if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
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else while (count > 0)
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{
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memcpy( bits, src_ptr, min( count, dst_stride ) );
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src_ptr += src_stride;
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bits = (char *)bits + dst_stride;
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count -= dst_stride;
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}
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if (src_bits.free) src_bits.free( &src_bits );
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}
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else ret = 0;
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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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char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
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BITMAPINFO *info = (BITMAPINFO *)buffer;
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BITMAPOBJ *bmp;
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DWORD err;
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int i, src_stride, dst_stride;
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struct bitblt_coords src, dst;
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struct gdi_image_bits src_bits;
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HRGN clip = NULL;
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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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src_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
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count = min( count, src_stride * bmp->dib.dsBm.bmHeight );
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dst_stride = get_dib_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
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src.visrect.left = src.x = 0;
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src.visrect.top = src.y = 0;
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src.visrect.right = src.width = bmp->dib.dsBm.bmWidth;
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src.visrect.bottom = src.height = (count + src_stride - 1 ) / src_stride;
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dst = src;
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if (count % src_stride)
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{
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HRGN last_row;
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int extra_pixels = ((count % src_stride) << 3) / bmp->dib.dsBm.bmBitsPixel;
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if ((count % src_stride << 3) % bmp->dib.dsBm.bmBitsPixel)
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FIXME( "Unhandled partial pixel\n" );
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clip = CreateRectRgn( src.visrect.left, src.visrect.top,
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src.visrect.right, src.visrect.bottom - 1 );
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last_row = CreateRectRgn( src.visrect.left, src.visrect.bottom - 1,
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src.visrect.left + extra_pixels, src.visrect.bottom );
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CombineRgn( clip, clip, last_row, RGN_OR );
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DeleteObject( last_row );
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}
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TRACE("(%p, %d, %p) %dx%d %d bpp fetched height: %d\n",
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hbitmap, count, bits, bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmHeight,
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bmp->dib.dsBm.bmBitsPixel, src.height );
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if (src_stride == dst_stride)
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{
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src_bits.ptr = (void *)bits;
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src_bits.is_copy = FALSE;
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src_bits.free = NULL;
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}
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else
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{
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if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
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{
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GDI_ReleaseObj( hbitmap );
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return 0;
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}
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src_bits.is_copy = TRUE;
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src_bits.free = free_heap_bits;
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for (i = 0; i < count / src_stride; i++)
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memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, src_stride );
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if (count % src_stride)
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memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, count % src_stride );
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}
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/* query the color info */
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info->bmiHeader.biSize = sizeof(info->bmiHeader);
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info->bmiHeader.biPlanes = 1;
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info->bmiHeader.biBitCount = bmp->dib.dsBm.bmBitsPixel;
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info->bmiHeader.biCompression = BI_RGB;
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info->bmiHeader.biXPelsPerMeter = 0;
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info->bmiHeader.biYPelsPerMeter = 0;
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info->bmiHeader.biClrUsed = 0;
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info->bmiHeader.biClrImportant = 0;
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info->bmiHeader.biWidth = 0;
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info->bmiHeader.biHeight = 0;
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info->bmiHeader.biSizeImage = 0;
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err = put_image_into_bitmap( bmp, 0, info, NULL, NULL, NULL );
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if (!err || err == ERROR_BAD_FORMAT)
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{
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info->bmiHeader.biWidth = bmp->dib.dsBm.bmWidth;
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info->bmiHeader.biHeight = -dst.height;
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info->bmiHeader.biSizeImage = dst.height * dst_stride;
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err = put_image_into_bitmap( bmp, clip, info, &src_bits, &src, &dst );
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}
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if (err) count = 0;
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if (clip) DeleteObject( clip );
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if (src_bits.free) src_bits.free( &src_bits );
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GDI_ReleaseObj( hbitmap );
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return count;
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}
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/***********************************************************************
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* BITMAP_SelectObject
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*/
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static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
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{
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HGDIOBJ ret;
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BITMAPOBJ *bitmap;
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DC *dc;
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PHYSDEV physdev;
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if (!(dc = get_dc_ptr( hdc ))) return 0;
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if (GetObjectType( hdc ) != OBJ_MEMDC)
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{
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ret = 0;
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goto done;
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}
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ret = dc->hBitmap;
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if (handle == dc->hBitmap) goto done; /* nothing to do */
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if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
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{
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ret = 0;
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goto done;
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}
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if (handle != GetStockObject(DEFAULT_BITMAP) && GDI_get_ref_count( handle ))
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{
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WARN( "Bitmap already selected in another DC\n" );
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GDI_ReleaseObj( handle );
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ret = 0;
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goto done;
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}
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if (bitmap->dib.dsBm.bmBitsPixel != 1 &&
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bitmap->dib.dsBm.bmBitsPixel != GetDeviceCaps( hdc, BITSPIXEL ))
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{
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WARN( "Wrong format bitmap %u bpp\n", bitmap->dib.dsBm.bmBitsPixel );
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GDI_ReleaseObj( handle );
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ret = 0;
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goto done;
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}
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physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
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if (!physdev->funcs->pSelectBitmap( physdev, handle ))
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{
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GDI_ReleaseObj( handle );
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ret = 0;
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}
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else
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{
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dc->hBitmap = handle;
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GDI_inc_ref_count( handle );
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dc->dirty = 0;
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dc->vis_rect.left = 0;
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dc->vis_rect.top = 0;
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dc->vis_rect.right = bitmap->dib.dsBm.bmWidth;
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dc->vis_rect.bottom = bitmap->dib.dsBm.bmHeight;
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dc->device_rect = dc->vis_rect;
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GDI_ReleaseObj( handle );
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DC_InitDC( dc );
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GDI_dec_ref_count( ret );
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}
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done:
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release_dc_ptr( dc );
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return ret;
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}
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|
|
|
|
/***********************************************************************
|
|
* BITMAP_DeleteObject
|
|
*/
|
|
static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
|
|
{
|
|
BITMAPOBJ *bmp = free_gdi_handle( handle );
|
|
|
|
if (!bmp) return FALSE;
|
|
HeapFree( GetProcessHeap(), 0, bmp->dib.dsBm.bmBits );
|
|
HeapFree( GetProcessHeap(), 0, bmp );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_GetObject
|
|
*/
|
|
static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
|
|
{
|
|
INT ret = 0;
|
|
BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
|
|
|
|
if (!bmp) return 0;
|
|
|
|
if (!buffer) ret = sizeof(BITMAP);
|
|
else if (count >= sizeof(BITMAP))
|
|
{
|
|
BITMAP *bitmap = buffer;
|
|
*bitmap = bmp->dib.dsBm;
|
|
bitmap->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;
|
|
}
|