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