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view src/video/SDL_alphamult.h @ 3500:4b594623401b

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Work in progress on multi-display support: * Added display parameter to many internal functions so video modes can be set on displays that aren't the public current one. * The fullscreen mode is associated with fullscreen windows - not displays, so different windows more naturally have a mode associated with them based on their width and height. It's no longer necessary to specify a fullscreen mode, a default one will be picked automatically for fullscreen windows.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 01 Dec 2009 05:57:15 +0000
parents cd863dd2082b
children f7b03b6838cb
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    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

    Sam Lantinga
    slouken@libsdl.org
*/

/* Functions to pre-multiply the alpha channel into the color channels */

#define DEFINE_PREMULTIPLY_FUNC(fmt) \
void \
SDL_PreMultiplyAlpha##fmt(int w, int h, Uint32 *pixels, int pitch);

/* *INDENT-OFF* */
DEFINE_PREMULTIPLY_FUNC(ARGB8888)
DEFINE_PREMULTIPLY_FUNC(RGBA8888)
DEFINE_PREMULTIPLY_FUNC(ABGR8888)
DEFINE_PREMULTIPLY_FUNC(BGRA8888)
/* *INDENT-ON* */

#undef DEFINE_PREMULTIPLY_FUNC

/* vi: set ts=4 sw=4 expandtab: */