2 * $Id: video_x11.c,v 1.20 2007-10-31 12:05:23 nkeynes Exp $
4 * Shared functions for all X11-based display drivers.
6 * Copyright (c) 2005 Nathan Keynes.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
22 #include "drivers/video_x11.h"
23 #include "drivers/gl_common.h"
25 extern uint32_t video_width, video_height;
28 * General X11 parameters. The front-end driver is expected to set this up
29 * by calling video_glx_init after initializing itself.
31 static Display *video_x11_display = NULL;
32 static Screen *video_x11_screen = NULL;
33 static Window video_x11_window = 0;
34 static gboolean glsl_loaded = FALSE;
39 static GLXContext glx_context;
40 static Window glx_window;
41 static XSetWindowAttributes win_attrs;
43 gboolean video_glx_create_window( int width, int height );
44 gboolean video_glx_init_context( Window window );
46 gboolean video_glx_init( Display *display, Screen *screen, Window window,
47 int width, int height, display_driver_t driver )
49 video_x11_display = display;
50 video_x11_screen = screen;
51 glx_window = video_x11_window = window;
53 if( !video_glx_init_context(glx_window) ) {
57 if( !glXIsDirect(video_x11_display, glx_context) ) {
58 WARN( "Not using direct rendering - this is likely to be slow" );
61 if( gl_fbo_is_supported() ) {
65 if( glsl_is_supported() ) {
66 glsl_loaded = glsl_load_shaders( glsl_vertex_shader_src, glsl_fragment_shader_src );
68 WARN( "Shaders failed to load" );
71 WARN( "Shaders not supported" );
77 ERROR( "Framebuffer objects not supported (required in this version)" );
84 * Create a new window with a custom visual - not used at the moment,
85 * but retained for future reference.
87 gboolean video_x11_create_window( int width, int height )
89 int visual_attrs[] = { GLX_RGBA, GLX_RED_SIZE, 4,
96 int screen = XScreenNumberOfScreen(video_x11_screen);
98 /* Find ourselves a nice visual */
99 visual = glXChooseVisual( video_x11_display,
103 /* Create a child window with the visual in question */
104 win_attrs.event_mask = 0;
105 win_attrs.colormap = XCreateColormap( video_x11_display,
106 RootWindowOfScreen(video_x11_screen),
107 visual->visual, AllocNone );
108 glx_window = XCreateWindow( video_x11_display, video_x11_window,
109 0, 0, width, height, 0, visual->depth,
110 InputOutput, visual->visual,
111 CWColormap | CWEventMask,
113 if( glx_window == None ) {
114 /* Hrm. Aww, no window? */
115 ERROR( "Unable to create GLX window" );
116 if( win_attrs.colormap )
117 XFreeColormap( video_x11_display, win_attrs.colormap );
121 XMapRaised( video_x11_display, glx_window );
127 gboolean video_glx_init_context( Window window )
129 XWindowAttributes attr;
134 XGetWindowAttributes(video_x11_display, window, &attr);
136 query.visualid = XVisualIDFromVisual(attr.visual);
137 visual = XGetVisualInfo(video_x11_display, VisualIDMask, &query, &query_items );
138 if( visual == NULL ) {
139 ERROR( "Unable to obtain a compatible visual" );
144 if( glXQueryVersion( video_x11_display, &major, &minor ) == False ) {
145 ERROR( "X Display lacks the GLX nature" );
149 if( major < 1 || minor < 2 ) {
150 ERROR( "X display supports GLX %d.%d, but we need at least 1.2", major, minor );
155 /* And a matching gl context */
156 glx_context = glXCreateContext( video_x11_display, visual, None, True );
157 if( glx_context == NULL ) {
158 ERROR( "Unable to obtain a GLX Context. Possibly your system is broken in some small, undefineable way" );
163 if( glXMakeCurrent( video_x11_display, window, glx_context ) == False ) {
164 ERROR( "Unable to prepare GLX context for drawing" );
165 glXDestroyContext( video_x11_display, glx_context );
174 void video_glx_shutdown()
177 glsl_unload_shaders();
179 if( glx_window != None ) {
180 XDestroyWindow( video_x11_display, glx_window );
181 XFreeColormap( video_x11_display, win_attrs.colormap );
184 if( glx_context != NULL ) {
185 glXDestroyContext( video_x11_display, glx_context );
191 int video_glx_load_font( const gchar *font_name )
194 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
198 lists = glGenLists(96);
199 glXUseXFont(font->fid, 32, 96, lists);
200 XFreeFont(video_x11_display, font);
205 void video_glx_swap_buffers( void )
207 glXSwapBuffers( video_x11_display, glx_window );
.