e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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_ */ |