2 * $Id: video_x11.c,v 1.6 2006-06-18 11:55:25 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"
25 * General X11 parameters. The front-end driver is expected to set this up
26 * by calling video_x11_set_display after initializing itself.
28 Display *video_x11_display = NULL;
29 Screen *video_x11_screen = NULL;
30 Window video_x11_window = 0;
35 GLXContext glx_context;
37 gboolean glx_open = FALSE;
39 void video_x11_set_display( Display *display, Screen *screen, Window window )
41 video_x11_display = display;
42 video_x11_screen = screen;
43 video_x11_window = window;
47 gboolean video_glx_create_window( int x, int y, int width, int height )
50 const char *glxExts, *glxServer;
51 int visual_attrs[] = { GLX_RGBA, GLX_RED_SIZE, 4,
58 int screen = XScreenNumberOfScreen(video_x11_screen);
59 XSetWindowAttributes win_attrs;
62 if( glXQueryVersion( video_x11_display, &major, &minor ) == False ) {
63 ERROR( "X Display lacks the GLX nature" );
66 if( major < 1 || minor < 2 ) {
67 ERROR( "X display supports GLX %d.%d, but we need at least 1.2", major, minor );
71 glxExts = glXQueryExtensionsString( video_x11_display, screen );
72 glxServer = glXQueryServerString( video_x11_display, screen, GLX_VENDOR );
73 INFO( "GLX version %d.%d, %s. Supported exts: %s", major, minor,
76 /* Find ourselves a nice visual */
77 visual = glXChooseVisual( video_x11_display,
80 if( visual == NULL ) {
81 ERROR( "Unable to obtain a compatible visual" );
85 /* And a matching gl context */
86 glx_context = glXCreateContext( video_x11_display, visual, None, True );
87 if( glx_context == NULL ) {
88 ERROR( "Unable to obtain a GLX Context. Possibly your system is broken in some small, undefineable way" );
93 /* Ok, all good so far. Unfortunately the visual we need to use will
94 * almost certainly be different from the one our frame is using. Which
95 * means we have to jump through the following hoops to create a
96 * child window with the appropriate settings.
98 win_attrs.event_mask = 0;
99 win_attrs.colormap = XCreateColormap( video_x11_display,
100 RootWindowOfScreen(video_x11_screen),
101 visual->visual, AllocNone );
102 glx_window = XCreateWindow( video_x11_display, video_x11_window,
103 x, y, width, height, 0, visual->depth,
104 InputOutput, visual->visual,
105 CWColormap | CWEventMask,
107 if( glx_window == None ) {
108 /* Hrm. Aww, no window? */
109 ERROR( "Unable to create GLX window" );
110 glXDestroyContext( video_x11_display, glx_context );
111 if( win_attrs.colormap )
112 XFreeColormap( video_x11_display, win_attrs.colormap );
115 XMapRaised( video_x11_display, glx_window );
117 /* And finally set the window to be the active drawing area */
118 if( glXMakeCurrent( video_x11_display, glx_window, glx_context ) == False ) {
119 /* Ok you have _GOT_ to be kidding me */
120 ERROR( "Unable to prepare GLX window for drawing" );
121 XDestroyWindow( video_x11_display, glx_window );
122 XFreeColormap( video_x11_display, win_attrs.colormap );
123 glXDestroyContext( video_x11_display, glx_context );
131 int video_glx_load_font( const gchar *font_name )
134 XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
138 lists = glGenLists(96);
139 glXUseXFont(font->fid, 32, 96, lists);
140 XFreeFont(video_x11_display, font);
145 gboolean video_glx_set_render_format( int x, int y, int width, int height )
149 return video_glx_create_window( x, y, width, height );
152 gboolean video_glx_display_frame( video_buffer_t frame )
154 GLenum type, format = GL_RGB;
155 switch( frame->colour_format ) {
157 type = GL_UNSIGNED_SHORT_5_6_5;
160 type = GL_UNSIGNED_BYTE;
162 case COLFMT_ARGB1555:
163 type = GL_UNSIGNED_SHORT_5_5_5_1;
165 case COLFMT_ARGB8888:
167 type = GL_UNSIGNED_INT_8_8_8_8_REV;
170 glDrawBuffer( GL_FRONT );
171 glViewport( 0, 0, frame->hres, frame->vres );
172 glMatrixMode(GL_PROJECTION);
174 glOrtho( 0, frame->hres, frame->vres, 0, 0, -65535 );
175 glMatrixMode(GL_MODELVIEW);
177 glRasterPos2i( 0, 0 );
178 glPixelZoom( 1.0f, -1.0f );
179 glDrawPixels( frame->hres, frame->vres, format, type,
185 gboolean video_glx_blank( int width, int height, uint32_t colour )
187 glDrawBuffer( GL_FRONT );
188 glViewport( 0, 0, width, height );
189 glMatrixMode( GL_PROJECTION );
191 glOrtho( 0, width, height, 0, 0, -65535 );
192 glMatrixMode(GL_MODELVIEW);
194 glColor3b( (colour >> 16) & 0xFF, (colour >> 8) & 0xFF, colour & 0xFF );
195 glRecti(0,0, width, height );
200 void video_glx_swap_buffers( void )
202 glXSwapBuffers( video_x11_display, glx_window );
205 void video_glx_create_pixmap( int width, int height )
.