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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdio.h>
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29
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30 #ifdef HAVE_OPENGL
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31 #include <GL/glx.h>
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32 #include <dlfcn.h>
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33 #endif
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34 #include "SDL_sysvideo.h"
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35
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36 struct SDL_PrivateGLData {
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37 int gl_active; /* to stop switching drivers while we have a valid context */
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38
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39 #ifdef HAVE_OPENGL
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40 GLXContext glx_context; /* Current GL context */
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41 XVisualInfo* glx_visualinfo; /* XVisualInfo* returned by glXChooseVisual */
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42
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43 XVisualInfo* (*glXChooseVisual)
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44 ( Display* dpy,
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45 int screen,
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46 int* attribList );
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47
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48 GLXContext (*glXCreateContext)
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49 ( Display* dpy,
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50 XVisualInfo* vis,
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51 GLXContext shareList,
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52 Bool direct );
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53
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54 void (*glXDestroyContext)
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55 ( Display* dpy,
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56 GLXContext ctx );
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57
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58 Bool (*glXMakeCurrent)
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59 ( Display* dpy,
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60 GLXDrawable drawable,
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61 GLXContext ctx );
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62
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63 void (*glXSwapBuffers)
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64 ( Display* dpy,
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65 GLXDrawable drawable );
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66
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67 int (*glXGetConfig)
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68 ( Display* dpy,
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69 XVisualInfo* visual_info,
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70 int attrib,
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71 int* value );
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72
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73 void (*glXReleaseBuffersMESA)
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74 ( Display* dpy,
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75 GLXDrawable drawable );
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76
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77 #endif /* HAVE_OPENGL */
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78 };
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79
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80 /* Old variable names */
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81 #define gl_active (this->gl_data->gl_active)
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82 #define glx_context (this->gl_data->glx_context)
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83 #define glx_visualinfo (this->gl_data->glx_visualinfo)
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84
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85 /* OpenGL functions */
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86 extern void *CGX_GL_GetVisual(_THIS);
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87 extern int CGX_GL_CreateWindow(_THIS, int w, int h);
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88 extern int CGX_GL_CreateContext(_THIS);
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89 extern void CGX_GL_Shutdown(_THIS);
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90 #ifdef HAVE_OPENGL
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91 extern int CGX_GL_MakeCurrent(_THIS);
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92 extern int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
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93 extern void CGX_GL_SwapBuffers(_THIS);
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94 extern int CGX_GL_LoadLibrary(_THIS, const char* path);
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95 extern void *CGX_GL_GetProcAddress(_THIS, const char* proc);
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96 #endif
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97 extern void CGX_GL_UnloadLibrary(_THIS);
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98
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