filename | src/drivers/video_x11.c |
changeset | 352:f0df7a6d4703 |
prev | 335:fb890e1814c0 |
next | 370:3131ba1440fc |
author | nkeynes |
date | Sun Feb 11 10:09:32 2007 +0000 (17 years ago) |
permissions | -rw-r--r-- |
last change | Bug 27: Implement opengl framebuffer objects Rewrite much of the final video output stage. Now uses generic "render buffers", implemented on GL using framebuffer objects + textures. |
file | annotate | diff | log | raw |
nkeynes@94 | 1 | /** |
nkeynes@352 | 2 | * $Id: video_x11.c,v 1.12 2007-02-11 10:09:32 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@94 | 23 | |
nkeynes@352 | 24 | extern uint32_t video_width, video_height; |
nkeynes@352 | 25 | |
nkeynes@103 | 26 | /** |
nkeynes@103 | 27 | * General X11 parameters. The front-end driver is expected to set this up |
nkeynes@352 | 28 | * by calling video_glx_init after initializing itself. |
nkeynes@103 | 29 | */ |
nkeynes@352 | 30 | static Display *video_x11_display = NULL; |
nkeynes@352 | 31 | static Screen *video_x11_screen = NULL; |
nkeynes@352 | 32 | static Window video_x11_window = 0; |
nkeynes@352 | 33 | |
nkeynes@103 | 34 | /** |
nkeynes@103 | 35 | * GLX parameters. |
nkeynes@103 | 36 | */ |
nkeynes@352 | 37 | static GLXContext glx_context; |
nkeynes@352 | 38 | static Window glx_window; |
nkeynes@352 | 39 | static XSetWindowAttributes win_attrs; |
nkeynes@103 | 40 | |
nkeynes@352 | 41 | gboolean video_glx_init( Display *display, Screen *screen, Window window, |
nkeynes@352 | 42 | int width, int height, display_driver_t driver ) |
nkeynes@94 | 43 | { |
nkeynes@94 | 44 | video_x11_display = display; |
nkeynes@94 | 45 | video_x11_screen = screen; |
nkeynes@94 | 46 | video_x11_window = window; |
nkeynes@352 | 47 | |
nkeynes@352 | 48 | if( !video_glx_create_window(width,height) ) { |
nkeynes@352 | 49 | return FALSE; |
nkeynes@352 | 50 | } |
nkeynes@352 | 51 | |
nkeynes@352 | 52 | if( gl_fbo_is_supported() ) { |
nkeynes@352 | 53 | gl_fbo_init(driver); |
nkeynes@352 | 54 | return TRUE; |
nkeynes@352 | 55 | } else { |
nkeynes@352 | 56 | /* Pbuffers? */ |
nkeynes@352 | 57 | ERROR( "Framebuffer objects not supported (required in this version)" ); |
nkeynes@352 | 58 | video_glx_shutdown(); |
nkeynes@352 | 59 | return FALSE; |
nkeynes@352 | 60 | } |
nkeynes@94 | 61 | } |
nkeynes@94 | 62 | |
nkeynes@352 | 63 | gboolean video_glx_create_window( int width, int height ) |
nkeynes@103 | 64 | { |
nkeynes@103 | 65 | int major, minor; |
nkeynes@103 | 66 | const char *glxExts, *glxServer; |
nkeynes@103 | 67 | int visual_attrs[] = { GLX_RGBA, GLX_RED_SIZE, 4, |
nkeynes@103 | 68 | GLX_GREEN_SIZE, 4, |
nkeynes@103 | 69 | GLX_BLUE_SIZE, 4, |
nkeynes@103 | 70 | GLX_ALPHA_SIZE, 4, |
nkeynes@335 | 71 | GLX_DEPTH_SIZE, 24, |
nkeynes@103 | 72 | GLX_DOUBLEBUFFER, |
nkeynes@103 | 73 | None }; |
nkeynes@103 | 74 | int screen = XScreenNumberOfScreen(video_x11_screen); |
nkeynes@103 | 75 | XVisualInfo *visual; |
nkeynes@103 | 76 | |
nkeynes@103 | 77 | if( glXQueryVersion( video_x11_display, &major, &minor ) == False ) { |
nkeynes@103 | 78 | ERROR( "X Display lacks the GLX nature" ); |
nkeynes@103 | 79 | return FALSE; |
nkeynes@103 | 80 | } |
nkeynes@103 | 81 | if( major < 1 || minor < 2 ) { |
nkeynes@103 | 82 | ERROR( "X display supports GLX %d.%d, but we need at least 1.2", major, minor ); |
nkeynes@103 | 83 | return FALSE; |
nkeynes@103 | 84 | } |
nkeynes@103 | 85 | |
nkeynes@103 | 86 | /* Find ourselves a nice visual */ |
nkeynes@103 | 87 | visual = glXChooseVisual( video_x11_display, |
nkeynes@103 | 88 | screen, |
nkeynes@103 | 89 | visual_attrs ); |
nkeynes@103 | 90 | if( visual == NULL ) { |
nkeynes@103 | 91 | ERROR( "Unable to obtain a compatible visual" ); |
nkeynes@103 | 92 | return FALSE; |
nkeynes@103 | 93 | } |
nkeynes@103 | 94 | |
nkeynes@103 | 95 | /* And a matching gl context */ |
nkeynes@103 | 96 | glx_context = glXCreateContext( video_x11_display, visual, None, True ); |
nkeynes@103 | 97 | if( glx_context == NULL ) { |
nkeynes@103 | 98 | ERROR( "Unable to obtain a GLX Context. Possibly your system is broken in some small, undefineable way" ); |
nkeynes@103 | 99 | return FALSE; |
nkeynes@103 | 100 | } |
nkeynes@103 | 101 | |
nkeynes@103 | 102 | |
nkeynes@103 | 103 | /* Ok, all good so far. Unfortunately the visual we need to use will |
nkeynes@103 | 104 | * almost certainly be different from the one our frame is using. Which |
nkeynes@103 | 105 | * means we have to jump through the following hoops to create a |
nkeynes@103 | 106 | * child window with the appropriate settings. |
nkeynes@103 | 107 | */ |
nkeynes@103 | 108 | win_attrs.event_mask = 0; |
nkeynes@103 | 109 | win_attrs.colormap = XCreateColormap( video_x11_display, |
nkeynes@103 | 110 | RootWindowOfScreen(video_x11_screen), |
nkeynes@103 | 111 | visual->visual, AllocNone ); |
nkeynes@103 | 112 | glx_window = XCreateWindow( video_x11_display, video_x11_window, |
nkeynes@352 | 113 | 0, 0, width, height, 0, visual->depth, |
nkeynes@103 | 114 | InputOutput, visual->visual, |
nkeynes@103 | 115 | CWColormap | CWEventMask, |
nkeynes@103 | 116 | &win_attrs ); |
nkeynes@103 | 117 | if( glx_window == None ) { |
nkeynes@103 | 118 | /* Hrm. Aww, no window? */ |
nkeynes@103 | 119 | ERROR( "Unable to create GLX window" ); |
nkeynes@103 | 120 | glXDestroyContext( video_x11_display, glx_context ); |
nkeynes@103 | 121 | if( win_attrs.colormap ) |
nkeynes@103 | 122 | XFreeColormap( video_x11_display, win_attrs.colormap ); |
nkeynes@103 | 123 | return FALSE; |
nkeynes@103 | 124 | } |
nkeynes@103 | 125 | XMapRaised( video_x11_display, glx_window ); |
nkeynes@103 | 126 | |
nkeynes@103 | 127 | /* And finally set the window to be the active drawing area */ |
nkeynes@103 | 128 | if( glXMakeCurrent( video_x11_display, glx_window, glx_context ) == False ) { |
nkeynes@103 | 129 | /* Ok you have _GOT_ to be kidding me */ |
nkeynes@103 | 130 | ERROR( "Unable to prepare GLX window for drawing" ); |
nkeynes@103 | 131 | XDestroyWindow( video_x11_display, glx_window ); |
nkeynes@103 | 132 | XFreeColormap( video_x11_display, win_attrs.colormap ); |
nkeynes@103 | 133 | glXDestroyContext( video_x11_display, glx_context ); |
nkeynes@103 | 134 | return FALSE; |
nkeynes@103 | 135 | } |
nkeynes@103 | 136 | return TRUE; |
nkeynes@103 | 137 | } |
nkeynes@352 | 138 | void video_glx_shutdown() |
nkeynes@352 | 139 | { |
nkeynes@352 | 140 | XDestroyWindow( video_x11_display, glx_window ); |
nkeynes@352 | 141 | XFreeColormap( video_x11_display, win_attrs.colormap ); |
nkeynes@352 | 142 | glXDestroyContext( video_x11_display, glx_context ); |
nkeynes@352 | 143 | } |
nkeynes@352 | 144 | |
nkeynes@103 | 145 | |
nkeynes@108 | 146 | int video_glx_load_font( const gchar *font_name ) |
nkeynes@108 | 147 | { |
nkeynes@108 | 148 | int lists; |
nkeynes@108 | 149 | XFontStruct *font = XLoadQueryFont(video_x11_display, font_name ); |
nkeynes@108 | 150 | if (font == NULL) |
nkeynes@108 | 151 | return -1; |
nkeynes@108 | 152 | |
nkeynes@108 | 153 | lists = glGenLists(96); |
nkeynes@108 | 154 | glXUseXFont(font->fid, 32, 96, lists); |
nkeynes@108 | 155 | XFreeFont(video_x11_display, font); |
nkeynes@108 | 156 | } |
nkeynes@108 | 157 | |
nkeynes@108 | 158 | |
nkeynes@103 | 159 | void video_glx_swap_buffers( void ) |
nkeynes@103 | 160 | { |
nkeynes@103 | 161 | glXSwapBuffers( video_x11_display, glx_window ); |
nkeynes@103 | 162 | } |
nkeynes@103 | 163 |
.