| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 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 |
| */ |
| #include "SDL_config.h" |
| |
| /* Atari OSMesa.ldg implementation of SDL OpenGL support */ |
| |
| #ifndef _SDL_ATARIGL_H_ |
| #define _SDL_ATARIGL_H_ |
| |
| #if SDL_VIDEO_OPENGL |
| #include <GL/osmesa.h> |
| #endif |
| |
| #include "../SDL_sysvideo.h" |
| |
| /* Hidden "this" pointer for the video functions */ |
| #define _THIS SDL_VideoDevice *this |
| |
| struct SDL_PrivateGLData { |
| |
| int gl_active; /* to stop switching drivers while we have a valid context */ |
| |
| int gl_oldmesa; /* Old OpenGL support ? */ |
| |
| int gl_pixelsize; /* for CopyShadow functions */ |
| |
| SDL_bool gl_upsidedown; /* Some implementations draw upside down */ |
| |
| Uint8 *gl_shadow; /* Shadow buffer for old implementations */ |
| |
| /* 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); |
| |
| #if SDL_VIDEO_OPENGL |
| 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; |
| #endif |
| }; |
| |
| /* Variable names */ |
| #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) |
| |
| /* OpenGL functions */ |
| extern int SDL_AtariGL_Init(_THIS, SDL_Surface *current); |
| extern void SDL_AtariGL_Quit(_THIS, SDL_bool unload); |
| extern void SDL_AtariGL_InitPointers(_THIS); |
| |
| extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path); |
| extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc); |
| extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value); |
| extern int SDL_AtariGL_MakeCurrent(_THIS); |
| extern void SDL_AtariGL_SwapBuffers(_THIS); |
| |
| #endif /* _SDL_ATARIGL_H_ */ |