src/video/ataricommon/SDL_atarigl_c.h
author Patrice Mandin
Sun, 30 Apr 2006 21:01:25 +0000
changeset 1751 a11c13151840
parent 1402 d910939febfa
child 1662 782fd950bd46
child 1895 c121d94672cb
child 4159 a1b03ba2fcd0
permissions -rw-r--r--
Declare volatile variables modified by interrupt routines
     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 #include "SDL_config.h"
    23 
    24 /* Atari OSMesa.ldg implementation of SDL OpenGL support */
    25 
    26 #ifndef _SDL_ATARIGL_H_
    27 #define _SDL_ATARIGL_H_
    28 
    29 #if SDL_VIDEO_OPENGL
    30 #include <GL/osmesa.h>
    31 #endif
    32 
    33 #include "../SDL_sysvideo.h"
    34 
    35 /* Hidden "this" pointer for the video functions */
    36 #define _THIS   SDL_VideoDevice *this
    37 
    38 struct SDL_PrivateGLData {
    39 
    40     int gl_active; 	/* to stop switching drivers while we have a valid context */
    41 	
    42 	int gl_oldmesa;	/* Old OpenGL support ? */
    43 
    44 	int	gl_pixelsize;	/* for CopyShadow functions */
    45 
    46 	SDL_bool gl_upsidedown; /* Some implementations draw upside down */
    47 
    48 	Uint8 *gl_shadow;	/* Shadow buffer for old implementations */
    49 
    50 	/* for unsupported OSMesa buffer formats */
    51 	void (*ConvertSurface)(_THIS, SDL_Surface *surface);	
    52 
    53 	/* to convert the shadow buffer to the screen format */
    54 	void (*CopyShadow)(_THIS, SDL_Surface *surface);	
    55 
    56 #if SDL_VIDEO_OPENGL
    57 	OSMesaContext	ctx;
    58 
    59 	/* OpenGL functions */
    60 	void (*glGetIntegerv)( GLenum pname, GLint *value );
    61 	void (*glFinish)(void);
    62 	void (*glFlush)(void);
    63 
    64 	/* osmesa.ldg */
    65 	OSMesaContext (*OSMesaCreateContextExt)( GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, OSMesaContext sharelist);
    66 	void (*OSMesaDestroyContext)( OSMesaContext ctx );
    67 	GLboolean (*OSMesaMakeCurrent)( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height );
    68 	void (*OSMesaPixelStore)( GLint pname, GLint value );
    69 	void * (*OSMesaGetProcAddress)( const char *funcName );
    70 
    71 	/* mesa_gl.ldg, tiny_gl.ldg */
    72 	void *(*OSMesaCreateLDG)( long format, long type, long width, long height );
    73 	void (*OSMesaDestroyLDG)(void);
    74 
    75 	/* Info needed to compare existing context with new asked one */
    76 	int width, height;
    77 	GLenum format;
    78 	GLint depth,stencil,accum;
    79 #endif
    80 };
    81 
    82 /* Variable names */
    83 #define gl_active		(this->gl_data->gl_active)
    84 #define gl_ctx			(this->gl_data->ctx)
    85 #define gl_oldmesa		(this->gl_data->gl_oldmesa)
    86 #define gl_pixelsize	(this->gl_data->gl_pixelsize)
    87 #define gl_upsidedown	(this->gl_data->gl_upsidedown)
    88 #define gl_shadow		(this->gl_data->gl_shadow)
    89 #define gl_convert		(this->gl_data->ConvertSurface)
    90 #define gl_copyshadow	(this->gl_data->CopyShadow)
    91 #define gl_curformat	(this->gl_data->format)
    92 #define gl_curdepth		(this->gl_data->depth)
    93 #define gl_curstencil	(this->gl_data->stencil)
    94 #define gl_curaccum		(this->gl_data->accum)
    95 #define gl_curwidth		(this->gl_data->width)
    96 #define gl_curheight	(this->gl_data->height)
    97 
    98 /* OpenGL functions */
    99 extern int SDL_AtariGL_Init(_THIS, SDL_Surface *current);
   100 extern void SDL_AtariGL_Quit(_THIS, SDL_bool unload);
   101 extern void SDL_AtariGL_InitPointers(_THIS);
   102 
   103 extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path);
   104 extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc);
   105 extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
   106 extern int SDL_AtariGL_MakeCurrent(_THIS);
   107 extern void SDL_AtariGL_SwapBuffers(_THIS);
   108 
   109 #endif /* _SDL_ATARIGL_H_ */