nkeynes@94 | 1 | /**
|
nkeynes@481 | 2 | * $Id: video_x11.c,v 1.20 2007-10-31 12:05:23 nkeynes Exp $
|
nkeynes@94 | 3 | *
|
nkeynes@103 | 4 | * Shared functions for all X11-based display drivers.
|
nkeynes@94 | 5 | *
|
nkeynes@94 | 6 | * Copyright (c) 2005 Nathan Keynes.
|
nkeynes@94 | 7 | *
|
nkeynes@94 | 8 | * This program is free software; you can redistribute it and/or modify
|
nkeynes@94 | 9 | * it under the terms of the GNU General Public License as published by
|
nkeynes@94 | 10 | * the Free Software Foundation; either version 2 of the License, or
|
nkeynes@94 | 11 | * (at your option) any later version.
|
nkeynes@94 | 12 | *
|
nkeynes@94 | 13 | * This program is distributed in the hope that it will be useful,
|
nkeynes@94 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
nkeynes@94 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
nkeynes@94 | 16 | * GNU General Public License for more details.
|
nkeynes@94 | 17 | */
|
nkeynes@94 | 18 |
|
nkeynes@103 | 19 | #include <X11/Xlib.h>
|
nkeynes@103 | 20 | #include <GL/glx.h>
|
nkeynes@103 | 21 | #include "dream.h"
|
nkeynes@94 | 22 | #include "drivers/video_x11.h"
|
nkeynes@405 | 23 | #include "drivers/gl_common.h"
|
nkeynes@94 | 24 |
|
nkeynes@352 | 25 | extern uint32_t video_width, video_height;
|
nkeynes@352 | 26 |
|
nkeynes@103 | 27 | /**
|
nkeynes@103 | 28 | * General X11 parameters. The front-end driver is expected to set this up
|
nkeynes@352 | 29 | * by calling video_glx_init after initializing itself.
|
nkeynes@103 | 30 | */
|
nkeynes@352 | 31 | static Display *video_x11_display = NULL;
|
nkeynes@352 | 32 | static Screen *video_x11_screen = NULL;
|
nkeynes@352 | 33 | static Window video_x11_window = 0;
|
nkeynes@405 | 34 | static gboolean glsl_loaded = FALSE;
|
nkeynes@352 | 35 |
|
nkeynes@103 | 36 | /**
|
nkeynes@103 | 37 | * GLX parameters.
|
nkeynes@103 | 38 | */
|
nkeynes@352 | 39 | static GLXContext glx_context;
|
nkeynes@352 | 40 | static Window glx_window;
|
nkeynes@352 | 41 | static XSetWindowAttributes win_attrs;
|
nkeynes@103 | 42 |
|
nkeynes@424 | 43 | gboolean video_glx_create_window( int width, int height );
|
nkeynes@481 | 44 | gboolean video_glx_init_context( Window window );
|
nkeynes@424 | 45 |
|
nkeynes@352 | 46 | gboolean video_glx_init( Display *display, Screen *screen, Window window,
|
nkeynes@352 | 47 | int width, int height, display_driver_t driver )
|
nkeynes@94 | 48 | {
|
nkeynes@94 | 49 | video_x11_display = display;
|
nkeynes@94 | 50 | video_x11_screen = screen;
|
nkeynes@442 | 51 | glx_window = video_x11_window = window;
|
nkeynes@352 | 52 |
|
nkeynes@442 | 53 | if( !video_glx_init_context(glx_window) ) {
|
nkeynes@352 | 54 | return FALSE;
|
nkeynes@352 | 55 | }
|
nkeynes@352 | 56 |
|
nkeynes@478 | 57 | if( !glXIsDirect(video_x11_display, glx_context) ) {
|
nkeynes@478 | 58 | WARN( "Not using direct rendering - this is likely to be slow" );
|
nkeynes@478 | 59 | }
|
nkeynes@478 | 60 |
|
nkeynes@352 | 61 | if( gl_fbo_is_supported() ) {
|
nkeynes@352 | 62 | gl_fbo_init(driver);
|
nkeynes@405 | 63 |
|
nkeynes@405 | 64 | #ifdef USE_GLSL
|
nkeynes@405 | 65 | if( glsl_is_supported() ) {
|
nkeynes@405 | 66 | glsl_loaded = glsl_load_shaders( glsl_vertex_shader_src, glsl_fragment_shader_src );
|
nkeynes@405 | 67 | if( !glsl_loaded ) {
|
nkeynes@405 | 68 | WARN( "Shaders failed to load" );
|
nkeynes@405 | 69 | }
|
nkeynes@405 | 70 | } else {
|
nkeynes@405 | 71 | WARN( "Shaders not supported" );
|
nkeynes@405 | 72 | }
|
nkeynes@405 | 73 | #endif
|
nkeynes@352 | 74 | return TRUE;
|
nkeynes@352 | 75 | } else {
|
nkeynes@352 | 76 | /* Pbuffers? */
|
nkeynes@352 | 77 | ERROR( "Framebuffer objects not supported (required in this version)" );
|
nkeynes@352 | 78 | video_glx_shutdown();
|
nkeynes@352 | 79 | return FALSE;
|
nkeynes@352 | 80 | }
|
nkeynes@94 | 81 | }
|
nkeynes@94 | 82 |
|
nkeynes@442 | 83 | /**
|
nkeynes@442 | 84 | * Create a new window with a custom visual - not used at the moment,
|
nkeynes@442 | 85 | * but retained for future reference.
|
nkeynes@442 | 86 | */
|
nkeynes@442 | 87 | gboolean video_x11_create_window( int width, int height )
|
nkeynes@103 | 88 | {
|
nkeynes@103 | 89 | int visual_attrs[] = { GLX_RGBA, GLX_RED_SIZE, 4,
|
nkeynes@103 | 90 | GLX_GREEN_SIZE, 4,
|
nkeynes@103 | 91 | GLX_BLUE_SIZE, 4,
|
nkeynes@103 | 92 | GLX_ALPHA_SIZE, 4,
|
nkeynes@335 | 93 | GLX_DEPTH_SIZE, 24,
|
nkeynes@103 | 94 | GLX_DOUBLEBUFFER,
|
nkeynes@103 | 95 | None };
|
nkeynes@103 | 96 | int screen = XScreenNumberOfScreen(video_x11_screen);
|
nkeynes@103 | 97 | XVisualInfo *visual;
|
nkeynes@442 | 98 | /* Find ourselves a nice visual */
|
nkeynes@442 | 99 | visual = glXChooseVisual( video_x11_display,
|
nkeynes@442 | 100 | screen,
|
nkeynes@442 | 101 | visual_attrs );
|
nkeynes@103 | 102 |
|
nkeynes@442 | 103 | /* Create a child window with the visual in question */
|
nkeynes@103 | 104 | win_attrs.event_mask = 0;
|
nkeynes@103 | 105 | win_attrs.colormap = XCreateColormap( video_x11_display,
|
nkeynes@103 | 106 | RootWindowOfScreen(video_x11_screen),
|
nkeynes@103 | 107 | visual->visual, AllocNone );
|
nkeynes@103 | 108 | glx_window = XCreateWindow( video_x11_display, video_x11_window,
|
nkeynes@352 | 109 | 0, 0, width, height, 0, visual->depth,
|
nkeynes@103 | 110 | InputOutput, visual->visual,
|
nkeynes@103 | 111 | CWColormap | CWEventMask,
|
nkeynes@103 | 112 | &win_attrs );
|
nkeynes@103 | 113 | if( glx_window == None ) {
|
nkeynes@103 | 114 | /* Hrm. Aww, no window? */
|
nkeynes@103 | 115 | ERROR( "Unable to create GLX window" );
|
nkeynes@103 | 116 | if( win_attrs.colormap )
|
nkeynes@103 | 117 | XFreeColormap( video_x11_display, win_attrs.colormap );
|
nkeynes@442 | 118 | XFree(visual);
|
nkeynes@103 | 119 | return FALSE;
|
nkeynes@103 | 120 | }
|
nkeynes@103 | 121 | XMapRaised( video_x11_display, glx_window );
|
nkeynes@439 | 122 |
|
nkeynes@442 | 123 | XFree(visual);
|
nkeynes@442 | 124 | return TRUE;
|
nkeynes@442 | 125 | }
|
nkeynes@439 | 126 |
|
nkeynes@442 | 127 | gboolean video_glx_init_context( Window window )
|
nkeynes@442 | 128 | {
|
nkeynes@442 | 129 | XWindowAttributes attr;
|
nkeynes@442 | 130 | XVisualInfo *visual;
|
nkeynes@442 | 131 | XVisualInfo query;
|
nkeynes@442 | 132 | int query_items = 1;
|
nkeynes@442 | 133 |
|
nkeynes@442 | 134 | XGetWindowAttributes(video_x11_display, window, &attr);
|
nkeynes@442 | 135 |
|
nkeynes@442 | 136 | query.visualid = XVisualIDFromVisual(attr.visual);
|
nkeynes@442 | 137 | visual = XGetVisualInfo(video_x11_display, VisualIDMask, &query, &query_items );
|
nkeynes@442 | 138 | if( visual == NULL ) {
|
nkeynes@442 | 139 | ERROR( "Unable to obtain a compatible visual" );
|
nkeynes@103 | 140 | return FALSE;
|
nkeynes@103 | 141 | }
|
nkeynes@442 | 142 |
|
nkeynes@442 | 143 | int major, minor;
|
nkeynes@442 | 144 | if( glXQueryVersion( video_x11_display, &major, &minor ) == False ) {
|
nkeynes@442 | 145 | ERROR( "X Display lacks the GLX nature" );
|
nkeynes@442 | 146 | XFree(visual);
|
nkeynes@442 | 147 | return FALSE;
|
nkeynes@442 | 148 | }
|
nkeynes@442 | 149 | if( major < 1 || minor < 2 ) {
|
nkeynes@442 | 150 | ERROR( "X display supports GLX %d.%d, but we need at least 1.2", major, minor );
|
nkeynes@442 | 151 | XFree(visual);
|
nkeynes@442 | 152 | return FALSE;
|
nkeynes@442 | 153 | }
|
nkeynes@442 | 154 |
|
nkeynes@442 | 155 | /* And a matching gl context */
|
nkeynes@442 | 156 | glx_context = glXCreateContext( video_x11_display, visual, None, True );
|
nkeynes@442 | 157 | if( glx_context == NULL ) {
|
nkeynes@442 | 158 | ERROR( "Unable to obtain a GLX Context. Possibly your system is broken in some small, undefineable way" );
|
nkeynes@442 | 159 | XFree(visual);
|
nkeynes@442 | 160 | return FALSE;
|
nkeynes@442 | 161 | }
|
nkeynes@442 | 162 |
|
nkeynes@442 | 163 | if( glXMakeCurrent( video_x11_display, window, glx_context ) == False ) {
|
nkeynes@442 | 164 | ERROR( "Unable to prepare GLX context for drawing" );
|
nkeynes@442 | 165 | glXDestroyContext( video_x11_display, glx_context );
|
nkeynes@442 | 166 | XFree(visual);
|
nkeynes@442 | 167 | return FALSE;
|
nkeynes@442 | 168 | }
|
nkeynes@442 | 169 | XFree(visual);
|
nkeynes@103 | 170 | return TRUE;
|
nkeynes@103 | 171 | }
|
nkeynes@370 | 172 |
|
nkeynes@442 | 173 |
|
nkeynes@352 | 174 | void video_glx_shutdown()
|
nkeynes@352 | 175 | {
|
nkeynes@405 | 176 | if( glsl_loaded ) {
|
nkeynes@405 | 177 | glsl_unload_shaders();
|
nkeynes@405 | 178 | }
|
nkeynes@370 | 179 | if( glx_window != None ) {
|
nkeynes@370 | 180 | XDestroyWindow( video_x11_display, glx_window );
|
nkeynes@370 | 181 | XFreeColormap( video_x11_display, win_attrs.colormap );
|
nkeynes@370 | 182 | glx_window = None;
|
nkeynes@370 | 183 | }
|
nkeynes@370 | 184 | if( glx_context != NULL ) {
|
nkeynes@370 | 185 | glXDestroyContext( video_x11_display, glx_context );
|
nkeynes@370 | 186 | glx_context = NULL;
|
nkeynes@370 | 187 | }
|
nkeynes@352 | 188 | }
|
nkeynes@352 | 189 |
|
nkeynes@103 | 190 |
|
nkeynes@108 | 191 | int video_glx_load_font( const gchar *font_name )
|
nkeynes@108 | 192 | {
|
nkeynes@108 | 193 | int lists;
|
nkeynes@108 | 194 | XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
|
nkeynes@108 | 195 | if (font == NULL)
|
nkeynes@108 | 196 | return -1;
|
nkeynes@108 | 197 |
|
nkeynes@108 | 198 | lists = glGenLists(96);
|
nkeynes@108 | 199 | glXUseXFont(font->fid, 32, 96, lists);
|
nkeynes@108 | 200 | XFreeFont(video_x11_display, font);
|
nkeynes@424 | 201 | return lists;
|
nkeynes@108 | 202 | }
|
nkeynes@108 | 203 |
|
nkeynes@108 | 204 |
|
nkeynes@103 | 205 | void video_glx_swap_buffers( void )
|
nkeynes@103 | 206 | {
|
nkeynes@103 | 207 | glXSwapBuffers( video_x11_display, glx_window );
|
nkeynes@103 | 208 | }
|
nkeynes@103 | 209 |
|