view include/SDL_blendmode.h @ 5004:0c72ae7b7cb2

Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 15:16:39 -0800
parents aa8888658021
children e743b9c3f6d6
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2010 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
*/

/**
 *  \file SDL_blendmode.h
 *  
 *  Header file declaring the SDL_BlendMode enumeration
 */

#ifndef _SDL_blendmode_h
#define _SDL_blendmode_h

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
extern "C" {
/* *INDENT-ON* */
#endif

/**
 *  \brief The blend mode used in SDL_RenderCopy() and drawing operations.
 */
typedef enum
{
    SDL_BLENDMODE_NONE = 0x00000000,     /**< No blending */
    SDL_BLENDMODE_MASK = 0x00000001,     /**< dst = A ? src : dst 
                                              (alpha is mask) */
    
    SDL_BLENDMODE_BLEND = 0x00000002,    /**< dst = (src * A) + (dst * (1-A)) */
    SDL_BLENDMODE_ADD = 0x00000004,      /**< dst = (src * A) + dst */
    SDL_BLENDMODE_MOD = 0x00000008       /**< dst = src * dst */
} SDL_BlendMode;

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
}
/* *INDENT-ON* */
#endif
#include "close_code.h"

#endif /* _SDL_video_h */

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