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SDL_atarigl_c.h
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2004 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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/* Atari OSMesa.ldg implementation of SDL OpenGL support */
#ifndef _SDL_ATARIGL_H_
#define _SDL_ATARIGL_H_
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#if SDL_VIDEO_OPENGL
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#include <GL/osmesa.h>
#endif
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#include "../SDL_sysvideo.h"
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struct SDL_GLDriverData
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int gl_active; /* to stop switching drivers while we have a valid context */
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int gl_oldmesa; /* Old OpenGL support ? */
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int gl_pixelsize; /* for CopyShadow functions */
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SDL_bool gl_upsidedown; /* Some implementations draw upside down */
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Uint8 *gl_shadow; /* Shadow buffer for old implementations */
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/* for unsupported OSMesa buffer formats */
void (*ConvertSurface) (_THIS, SDL_Surface * surface);
/* to convert the shadow buffer to the screen format */
void (*CopyShadow) (_THIS, SDL_Surface * surface);
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#if SDL_VIDEO_OPENGL
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OSMesaContext ctx;
/* OpenGL functions */
void (*glGetIntegerv) (GLenum pname, GLint * value);
void (*glFinish) (void);
void (*glFlush) (void);
/* osmesa.ldg */
OSMesaContext(*OSMesaCreateContextExt) (GLenum format, GLint depthBits,
GLint stencilBits,
GLint accumBits,
OSMesaContext sharelist);
void (*OSMesaDestroyContext) (OSMesaContext ctx);
GLboolean(*OSMesaMakeCurrent) (OSMesaContext ctx, void *buffer,
GLenum type, GLsizei width,
GLsizei height);
void (*OSMesaPixelStore) (GLint pname, GLint value);
void *(*OSMesaGetProcAddress) (const char *funcName);
/* mesa_gl.ldg, tiny_gl.ldg */
void *(*OSMesaCreateLDG) (long format, long type, long width,
long height);
void (*OSMesaDestroyLDG) (void);
/* Info needed to compare existing context with new asked one */
int width, height;
GLenum format;
GLint depth, stencil, accum;
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/* Variable names */
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#define gl_active (_this->gl_data->gl_active)
#define gl_ctx (_this->gl_data->ctx)
#define gl_oldmesa (_this->gl_data->gl_oldmesa)
#define gl_pixelsize (_this->gl_data->gl_pixelsize)
#define gl_upsidedown (_this->gl_data->gl_upsidedown)
#define gl_shadow (_this->gl_data->gl_shadow)
#define gl_convert (_this->gl_data->ConvertSurface)
#define gl_copyshadow (_this->gl_data->CopyShadow)
#define gl_curformat (_this->gl_data->format)
#define gl_curdepth (_this->gl_data->depth)
#define gl_curstencil (_this->gl_data->stencil)
#define gl_curaccum (_this->gl_data->accum)
#define gl_curwidth (_this->gl_data->width)
#define gl_curheight (_this->gl_data->height)
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/* OpenGL functions */
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extern int SDL_AtariGL_Init(_THIS, SDL_Surface * current);
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extern void SDL_AtariGL_Quit(_THIS, SDL_bool unload);
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extern void SDL_AtariGL_InitPointers(_THIS);
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extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path);
extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc);
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extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int *value);
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extern int SDL_AtariGL_MakeCurrent(_THIS);
extern void SDL_AtariGL_SwapBuffers(_THIS);
#endif /* _SDL_ATARIGL_H_ */
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/* vi: set ts=4 sw=4 expandtab: */