Mercurial > sdl-ios-xcode

comparison src/video/SDL_blendrect.c @ 2888:32e8bbba1e94

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added stubs for software implementations of blending fills and line drawing
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 13:14:28 +0000
parents
children 1ef2f1e75ff7
comparison
equal deleted inserted replaced
2887:f8c0c5ef6d54 2888:32e8bbba1e94
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #include "SDL_video.h"
25 #include "SDL_blit.h"
26
27
28 int
29 SDL_BlendRect(SDL_Surface * dst, SDL_Rect * dstrect, int blendMode, Uint8 r,
30 Uint8 g, Uint8 b, Uint8 a)
31 {
32 /* This function doesn't work on surfaces < 8 bpp */
33 if (dst->format->BitsPerPixel < 8) {
34 SDL_SetError("SDL_BlendRect(): Unsupported surface format");
35 return (-1);
36 }
37
38 /* If 'dstrect' == NULL, then fill the whole surface */
39 if (dstrect) {
40 /* Perform clipping */
41 if (!SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect)) {
42 return (0);
43 }
44 } else {
45 dstrect = &dst->clip_rect;
46 }
47
48 SDL_Unsupported();
49 return -1;
50 }
51
52 /* vi: set ts=4 sw=4 expandtab: */