2 * Copyright 2009 Vincent Povirk for CodeWeavers
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
29 #include "wincodecs_private.h"
31 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
35 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
40 case DLL_PROCESS_ATTACH:
41 DisableThreadLibraryCalls(hinstDLL);
43 case DLL_PROCESS_DETACH:
50 HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
51 UINT srcwidth, UINT srcheight, INT srcstride,
52 const WICRect *rc, UINT dststride, UINT dstbuffersize, BYTE *dstbuffer)
55 UINT row_offset; /* number of bits into the source rows where the data starts */
62 rect.Width = srcwidth;
63 rect.Height = srcheight;
68 if (rc->X < 0 || rc->Y < 0 || rc->X+rc->Width > srcwidth || rc->Y+rc->Height > srcheight)
72 bytesperrow = ((bpp * rc->Width)+7)/8;
74 if (dststride < bytesperrow)
77 if ((dststride * rc->Height) > dstbuffersize)
80 /* if the whole bitmap is copied and the buffer format matches then it's a matter of a single memcpy */
81 if (rc->X == 0 && rc->Y == 0 && rc->Width == srcwidth && rc->Height == srcheight && srcstride == dststride)
83 memcpy(dstbuffer, srcbuffer, srcstride * srcheight);
87 row_offset = rc->X * bpp;
89 if (row_offset % 8 == 0)
91 /* everything lines up on a byte boundary */
96 src = srcbuffer + (row_offset / 8) + srcstride * rc->Y;
98 for (row=0; row < rc->Height; row++)
100 memcpy(dst, src, bytesperrow);
108 /* we have to do a weird bitwise copy. eww. */
109 FIXME("cannot reliably copy bitmap data if bpp < 8\n");