Mercurial > sdl-ios-xcode

annotate src/video/SDL_alphamult.h @ 4495:dbbfdb9ea716

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Simplified clipboard API for sanity's sake. A complete clipboard implementation would support multiple formats that could be queried at runtime, events for when the clipboard contents changed, support for HTML, images, etc. We're not going that crazy, at least for now. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 07 Jul 2010 23:54:03 -0700
parents f7b03b6838cb
children
rev   line source
3054
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
3697
f7b03b6838cb Fixed bug #926
Sam Lantinga <slouken@libsdl.org>
parents: 3055
diff changeset
3 Copyright (C) 1997-2010 Sam Lantinga
3054
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
4
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
6 modify it under the terms of the GNU Lesser General Public
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
9
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
13 Lesser General Public License for more details.
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
16 License along with this library; if not, write to the Free Software
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
18
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
19 Sam Lantinga
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
20 slouken@libsdl.org
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
21 */
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
22
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
23 /* Functions to pre-multiply the alpha channel into the color channels */
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
24
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
25 #define DEFINE_PREMULTIPLY_FUNC(fmt) \
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
26 void \
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
27 SDL_PreMultiplyAlpha##fmt(int w, int h, Uint32 *pixels, int pitch);
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
28
3055
Sam Lantinga <slouken@libsdl.org>
parents: 3054
diff changeset
29 /* *INDENT-OFF* */
3054
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
30 DEFINE_PREMULTIPLY_FUNC(ARGB8888)
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
31 DEFINE_PREMULTIPLY_FUNC(RGBA8888)
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
32 DEFINE_PREMULTIPLY_FUNC(ABGR8888)
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
33 DEFINE_PREMULTIPLY_FUNC(BGRA8888)
3055
Sam Lantinga <slouken@libsdl.org>
parents: 3054
diff changeset
34 /* *INDENT-ON* */
3054
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
35
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
36 #undef DEFINE_PREMULTIPLY_FUNC
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
37
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
38 /* vi: set ts=4 sw=4 expandtab: */