src/video/ataricommon/SDL_atarigl_c.h
author Patrice Mandin <patmandin@gmail.com>
Fri, 26 Nov 2004 16:16:50 +0000
changeset 991 12b13601a544
parent 989 475166d13b44
child 992 0324ce32b2d9
permissions -rw-r--r--
Final touches to OSMesa OpenGL support on Atari, using loadable libraries. Hope SDL 1.2.8 is out soon.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2004 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 /* Atari OSMesa.ldg implementation of SDL OpenGL support */
    24 
    25 #ifndef _SDL_ATARIGL_H_
    26 #define _SDL_ATARIGL_H_
    27 
    28 #ifdef HAVE_OPENGL
    29 #include <GL/osmesa.h>
    30 #endif
    31 
    32 #include "SDL_sysvideo.h"
    33 #define _THIS   SDL_VideoDevice *this
    34 
    35 struct SDL_PrivateGLData {
    36 
    37     int gl_active; 	/* to stop switching drivers while we have a valid context */
    38 	
    39 	int gl_oldmesa;	/* Old OpenGL support ? */
    40 
    41 	int	gl_pixelsize;	/* for CopyShadow functions */
    42 
    43 	Uint8 *gl_shadow;	/* Shadow buffer for old implementations */
    44 
    45 	/* for unsupported OSMesa buffer formats */
    46 	void (*ConvertSurface)(_THIS, SDL_Surface *surface);	
    47 
    48 	/* to convert the shadow buffer to the screen format */
    49 	void (*CopyShadow)(_THIS, SDL_Surface *surface);	
    50 
    51 	OSMesaContext	ctx;
    52 
    53 	/* osmesa.ldg */
    54 	OSMesaContext (*OSMesaCreateContextExt)( GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, OSMesaContext sharelist);
    55 	void (*OSMesaDestroyContext)( OSMesaContext ctx );
    56 	GLboolean (*OSMesaMakeCurrent)( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height );
    57 	void (*OSMesaPixelStore)( GLint pname, GLint value );
    58 	void * (*OSMesaGetProcAddress)( const char *funcName );
    59 	void (*glGetIntegerv)( GLenum pname, GLint *value );
    60 
    61 	/* mesa_gl.ldg, tiny_gl.ldg */
    62 	void *(*OSMesaCreateLDG)( long format, long type, long width, long height );
    63 	void (*OSMesaDestroyLDG)(void);
    64 };
    65 
    66 /* Variable names */
    67 #define gl_active	(this->gl_data->gl_active)
    68 #define gl_ctx		(this->gl_data->ctx)
    69 #define gl_oldmesa	(this->gl_data->gl_oldmesa)
    70 #define gl_pixelsize	(this->gl_data->gl_pixelsize)
    71 #define gl_shadow	(this->gl_data->gl_shadow)
    72 #define gl_convert	(this->gl_data->ConvertSurface)
    73 #define gl_copyshadow	(this->gl_data->CopyShadow)
    74 
    75 /* OpenGL functions */
    76 extern int SDL_AtariGL_Init(_THIS, SDL_Surface *current);
    77 extern void SDL_AtariGL_Quit(_THIS);
    78 extern void SDL_AtariGL_InitPointers(_THIS);
    79 
    80 extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path);
    81 extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc);
    82 extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
    83 extern int SDL_AtariGL_MakeCurrent(_THIS);
    84 extern void SDL_AtariGL_SwapBuffers(_THIS);
    85 
    86 #endif /* _SDL_ATARIGL_H_ */