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Sweden-Number/dlls/gdi32/metafile16.c

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/*
* Metafile functions
*
* Copyright David W. Metcalfe, 1994
* Copyright Niels de Carpentier, 1996
* Copyright Albrecht Kleine, 1996
* Copyright Huw Davies, 1996
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <string.h>
#include <fcntl.h>
#include "wine/winbase16.h"
#include "wine/wingdi16.h"
#include "wownt32.h"
#include "winreg.h"
#include "winternl.h"
#include "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(metafile);
/******************************************************************
* MF_GetMetaHeader16
*
* Returns ptr to METAHEADER associated with HMETAFILE16
* Should be followed by call to MF_ReleaseMetaHeader16
*/
static METAHEADER *MF_GetMetaHeader16( HMETAFILE16 hmf )
{
return GlobalLock16(hmf);
}
/******************************************************************
* MF_ReleaseMetaHeader16
*
* Releases METAHEADER associated with HMETAFILE16
*/
static BOOL16 MF_ReleaseMetaHeader16( HMETAFILE16 hmf )
{
return GlobalUnlock16( hmf );
}
/******************************************************************
* DeleteMetaFile (GDI.127)
*/
BOOL16 WINAPI DeleteMetaFile16( HMETAFILE16 hmf )
{
return !GlobalFree16( hmf );
}
/******************************************************************
* GetMetaFile (GDI.124)
*/
HMETAFILE16 WINAPI GetMetaFile16( LPCSTR lpFilename )
{
METAHEADER *mh;
HANDLE hFile;
TRACE("%s\n", lpFilename);
if(!lpFilename)
return 0;
if((hFile = CreateFileA(lpFilename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, 0)) == INVALID_HANDLE_VALUE)
return 0;
mh = MF_ReadMetaFile(hFile);
CloseHandle(hFile);
if(!mh) return 0;
return MF_Create_HMETAFILE16( mh );
}
/******************************************************************
* CopyMetaFile (GDI.151)
*/
HMETAFILE16 WINAPI CopyMetaFile16( HMETAFILE16 hSrcMetaFile, LPCSTR lpFilename)
{
METAHEADER *mh = MF_GetMetaHeader16( hSrcMetaFile );
METAHEADER *mh2 = NULL;
HANDLE hFile;
TRACE("(%08x,%s)\n", hSrcMetaFile, lpFilename);
if(!mh) return 0;
if(mh->mtType == METAFILE_DISK)
mh2 = MF_LoadDiskBasedMetaFile(mh);
else {
mh2 = HeapAlloc( GetProcessHeap(), 0, mh->mtSize * 2 );
memcpy( mh2, mh, mh->mtSize * 2 );
}
MF_ReleaseMetaHeader16( hSrcMetaFile );
if(lpFilename) { /* disk based metafile */
DWORD w;
if((hFile = CreateFileA(lpFilename, GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS, 0, 0)) == INVALID_HANDLE_VALUE) {
HeapFree( GetProcessHeap(), 0, mh2 );
return 0;
}
WriteFile(hFile, mh2, mh2->mtSize * 2, &w, NULL);
CloseHandle(hFile);
mh2 = MF_CreateMetaHeaderDisk(mh2, lpFilename, FALSE);
}
return MF_Create_HMETAFILE16( mh2 );
}
/******************************************************************
* IsValidMetaFile (GDI.410)
*
* Attempts to check if a given metafile is correctly formatted.
* Currently, the only things verified are several properties of the
* header.
*
* RETURNS
* TRUE if hmf passes some tests for being a valid metafile, FALSE otherwise.
*
* BUGS
* This is not exactly what windows does, see _Undocumented_Windows_
* for details.
*/
BOOL16 WINAPI IsValidMetaFile16(HMETAFILE16 hmf)
{
BOOL16 res=FALSE;
METAHEADER *mh = MF_GetMetaHeader16(hmf);
if (mh) {
if (mh->mtType == METAFILE_MEMORY || mh->mtType == METAFILE_DISK)
if (mh->mtHeaderSize == MFHEADERSIZE/sizeof(INT16))
if (mh->mtVersion == MFVERSION)
res=TRUE;
MF_ReleaseMetaHeader16(hmf);
}
TRACE("IsValidMetaFile %x => %d\n",hmf,res);
return res;
}
/******************************************************************
* PlayMetaFile (GDI.123)
*
*/
BOOL16 WINAPI PlayMetaFile16( HDC16 hdc, HMETAFILE16 hmf )
{
BOOL16 ret;
METAHEADER *mh = MF_GetMetaHeader16( hmf );
ret = MF_PlayMetaFile( HDC_32(hdc), mh );
MF_ReleaseMetaHeader16( hmf );
return ret;
}
/******************************************************************
* EnumMetaFile (GDI.175)
*
*/
BOOL16 WINAPI EnumMetaFile16( HDC16 hdc16, HMETAFILE16 hmf,
MFENUMPROC16 lpEnumFunc, LPARAM lpData )
{
METAHEADER *mh = MF_GetMetaHeader16(hmf);
METARECORD *mr;
HANDLETABLE16 *ht;
HDC hdc = HDC_32(hdc16);
HGLOBAL16 hHT;
SEGPTR spht;
unsigned int offset = 0;
WORD i, seg;
HPEN hPen;
HBRUSH hBrush;
HFONT hFont;
WORD args[8];
BOOL16 result = TRUE, loaded = FALSE;
TRACE("(%p, %04x, %p, %08lx)\n", hdc, hmf, lpEnumFunc, lpData);
if(!mh) return FALSE;
if(mh->mtType == METAFILE_DISK) { /* Create a memory-based copy */
mh = MF_LoadDiskBasedMetaFile(mh);
if(!mh) return FALSE;
loaded = TRUE;
}
/* save the current pen, brush and font */
hPen = GetCurrentObject(hdc, OBJ_PEN);
hBrush = GetCurrentObject(hdc, OBJ_BRUSH);
hFont = GetCurrentObject(hdc, OBJ_FONT);
/* create the handle table */
hHT = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT,
sizeof(HANDLETABLE16) * mh->mtNoObjects);
spht = WOWGlobalLock16(hHT);
seg = hmf | 7;
offset = mh->mtHeaderSize * 2;
/* loop through metafile records */
args[7] = hdc16;
args[6] = SELECTOROF(spht);
args[5] = OFFSETOF(spht);
args[4] = seg + (HIWORD(offset) << __AHSHIFT);
args[3] = LOWORD(offset);
args[2] = mh->mtNoObjects;
args[1] = HIWORD(lpData);
args[0] = LOWORD(lpData);
while (offset < (mh->mtSize * 2))
{
DWORD ret;
mr = (METARECORD *)((char *)mh + offset);
WOWCallback16Ex( (DWORD)lpEnumFunc, WCB16_PASCAL, sizeof(args), args, &ret );
if (!LOWORD(ret))
{
result = FALSE;
break;
}
offset += (mr->rdSize * 2);
args[4] = seg + (HIWORD(offset) << __AHSHIFT);
args[3] = LOWORD(offset);
}
SelectObject(hdc, hBrush);
SelectObject(hdc, hPen);
SelectObject(hdc, hFont);
ht = GlobalLock16(hHT);
/* free objects in handle table */
for(i = 0; i < mh->mtNoObjects; i++)
if(*(ht->objectHandle + i) != 0)
DeleteObject( (HGDIOBJ)(ULONG_PTR)(*(ht->objectHandle + i) ));
/* free handle table */
GlobalFree16(hHT);
if(loaded)
HeapFree( GetProcessHeap(), 0, mh );
MF_ReleaseMetaHeader16(hmf);
return result;
}
/******************************************************************
* GetMetaFileBits (GDI.159)
*
* Trade in a metafile object handle for a handle to the metafile memory.
*
* PARAMS
* hmf [I] metafile handle
*/
HGLOBAL16 WINAPI GetMetaFileBits16( HMETAFILE16 hmf )
{
TRACE("hMem out: %04x\n", hmf);
return hmf;
}
/******************************************************************
* SetMetaFileBits (GDI.160)
*
* Trade in a metafile memory handle for a handle to a metafile object.
* The memory region should hold a proper metafile, otherwise
* problems will occur when it is used. Validity of the memory is not
* checked. The function is essentially just the identity function.
*
* PARAMS
* hMem [I] handle to a memory region holding a metafile
*
* RETURNS
* Handle to a metafile on success, NULL on failure..
*/
HMETAFILE16 WINAPI SetMetaFileBits16( HGLOBAL16 hMem )
{
TRACE("hmf out: %04x\n", hMem);
return hMem;
}
/******************************************************************
* SetMetaFileBitsBetter (GDI.196)
*
* Trade in a metafile memory handle for a handle to a metafile object,
* making a cursory check (using IsValidMetaFile()) that the memory
* handle points to a valid metafile.
*
* RETURNS
* Handle to a metafile on success, NULL on failure..
*/
HMETAFILE16 WINAPI SetMetaFileBitsBetter16( HMETAFILE16 hMeta )
{
if( IsValidMetaFile16( hMeta ) )
return GlobalReAlloc16( hMeta, 0, GMEM_SHARE | GMEM_NODISCARD | GMEM_MODIFY);
return 0;
}
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