Sweden-Number/dlls/windowscodecs/main.c

113 lines
3.0 KiB
C

/*
* Copyright 2009 Vincent Povirk for CodeWeavers
*
* 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 <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodec.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls(hinstDLL);
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
UINT srcwidth, UINT srcheight, INT srcstride,
const WICRect *rc, UINT dststride, UINT dstbuffersize, BYTE *dstbuffer)
{
UINT bytesperrow;
UINT row_offset; /* number of bits into the source rows where the data starts */
WICRect rect;
if (!rc)
{
rect.X = 0;
rect.Y = 0;
rect.Width = srcwidth;
rect.Height = srcheight;
rc = &rect;
}
else
{
if (rc->X < 0 || rc->Y < 0 || rc->X+rc->Width > srcwidth || rc->Y+rc->Height > srcheight)
return E_INVALIDARG;
}
bytesperrow = ((bpp * rc->Width)+7)/8;
if (dststride < bytesperrow)
return E_INVALIDARG;
if ((dststride * rc->Height) > dstbuffersize)
return E_INVALIDARG;
/* if the whole bitmap is copied and the buffer format matches then it's a matter of a single memcpy */
if (rc->X == 0 && rc->Y == 0 && rc->Width == srcwidth && rc->Height == srcheight && srcstride == dststride)
{
memcpy(dstbuffer, srcbuffer, srcstride * srcheight);
return S_OK;
}
row_offset = rc->X * bpp;
if (row_offset % 8 == 0)
{
/* everything lines up on a byte boundary */
UINT row;
const BYTE *src;
BYTE *dst;
src = srcbuffer + (row_offset / 8) + srcstride * rc->Y;
dst = dstbuffer;
for (row=0; row < rc->Height; row++)
{
memcpy(dst, src, bytesperrow);
src += srcstride;
dst += dststride;
}
return S_OK;
}
else
{
/* we have to do a weird bitwise copy. eww. */
FIXME("cannot reliably copy bitmap data if bpp < 8\n");
return E_FAIL;
}
}