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view src/video/cybergfx/SDL_cgxgl_c.h @ 3880:74e828c64315 SDL-1.2

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:45:37 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 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
*/
#include "SDL_config.h"

/* StormMesa implementation of SDL OpenGL support */

#include "../SDL_sysvideo.h"

#define _THIS   SDL_VideoDevice *_this

#if SDL_VIDEO_OPENGL
#include <GL/Amigamesa.h>
extern void *AmiGetGLProc(const char *proc);
#endif /* SDL_VIDEO_OPENGL */

struct SDL_PrivateGLData {
	int gl_active;
};

/* OpenGL functions */
extern int CGX_GL_Init(_THIS);
extern void CGX_GL_Quit(_THIS);
extern int CGX_GL_Update(_THIS);
#if SDL_VIDEO_OPENGL
extern int CGX_GL_MakeCurrent(_THIS);
extern int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
extern void CGX_GL_SwapBuffers(_THIS);
extern void *CGX_GL_GetProcAddress(_THIS, const char *proc);
extern int CGX_GL_LoadLibrary(_THIS, const char *path);
#endif

#undef _THIS