nkeynes@94 | 1 | /**
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nkeynes@160 | 2 | * $Id: video_x11.c,v 1.6 2006-06-18 11:55:25 nkeynes Exp $
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nkeynes@94 | 3 | *
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nkeynes@103 | 4 | * Shared functions for all X11-based display drivers.
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nkeynes@94 | 5 | *
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nkeynes@94 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@94 | 7 | *
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nkeynes@94 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@94 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@94 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@94 | 11 | * (at your option) any later version.
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nkeynes@94 | 12 | *
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nkeynes@94 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@94 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@94 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@94 | 16 | * GNU General Public License for more details.
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nkeynes@94 | 17 | */
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nkeynes@94 | 18 |
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nkeynes@103 | 19 | #include <X11/Xlib.h>
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nkeynes@103 | 20 | #include <GL/glx.h>
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nkeynes@103 | 21 | #include "dream.h"
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nkeynes@94 | 22 | #include "drivers/video_x11.h"
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nkeynes@94 | 23 |
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nkeynes@103 | 24 | /**
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nkeynes@103 | 25 | * General X11 parameters. The front-end driver is expected to set this up
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nkeynes@103 | 26 | * by calling video_x11_set_display after initializing itself.
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nkeynes@103 | 27 | */
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nkeynes@94 | 28 | Display *video_x11_display = NULL;
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nkeynes@94 | 29 | Screen *video_x11_screen = NULL;
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nkeynes@94 | 30 | Window video_x11_window = 0;
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nkeynes@94 | 31 |
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nkeynes@103 | 32 | /**
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nkeynes@103 | 33 | * GLX parameters.
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nkeynes@103 | 34 | */
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nkeynes@103 | 35 | GLXContext glx_context;
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nkeynes@103 | 36 | Window glx_window;
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nkeynes@103 | 37 | gboolean glx_open = FALSE;
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nkeynes@103 | 38 |
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nkeynes@94 | 39 | void video_x11_set_display( Display *display, Screen *screen, Window window )
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nkeynes@94 | 40 | {
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nkeynes@94 | 41 | video_x11_display = display;
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nkeynes@94 | 42 | video_x11_screen = screen;
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nkeynes@94 | 43 | video_x11_window = window;
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nkeynes@94 | 44 | }
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nkeynes@94 | 45 |
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nkeynes@103 | 46 |
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nkeynes@103 | 47 | gboolean video_glx_create_window( int x, int y, int width, int height )
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nkeynes@103 | 48 | {
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nkeynes@103 | 49 | int major, minor;
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nkeynes@103 | 50 | const char *glxExts, *glxServer;
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nkeynes@103 | 51 | int visual_attrs[] = { GLX_RGBA, GLX_RED_SIZE, 4,
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nkeynes@103 | 52 | GLX_GREEN_SIZE, 4,
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nkeynes@103 | 53 | GLX_BLUE_SIZE, 4,
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nkeynes@103 | 54 | GLX_ALPHA_SIZE, 4,
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nkeynes@103 | 55 | GLX_DEPTH_SIZE, 16,
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nkeynes@103 | 56 | GLX_DOUBLEBUFFER,
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nkeynes@103 | 57 | None };
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nkeynes@103 | 58 | int screen = XScreenNumberOfScreen(video_x11_screen);
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nkeynes@103 | 59 | XSetWindowAttributes win_attrs;
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nkeynes@103 | 60 | XVisualInfo *visual;
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nkeynes@103 | 61 |
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nkeynes@103 | 62 | if( glXQueryVersion( video_x11_display, &major, &minor ) == False ) {
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nkeynes@103 | 63 | ERROR( "X Display lacks the GLX nature" );
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nkeynes@103 | 64 | return FALSE;
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nkeynes@103 | 65 | }
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nkeynes@103 | 66 | if( major < 1 || minor < 2 ) {
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nkeynes@103 | 67 | ERROR( "X display supports GLX %d.%d, but we need at least 1.2", major, minor );
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nkeynes@103 | 68 | return FALSE;
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nkeynes@103 | 69 | }
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nkeynes@103 | 70 |
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nkeynes@103 | 71 | glxExts = glXQueryExtensionsString( video_x11_display, screen );
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nkeynes@103 | 72 | glxServer = glXQueryServerString( video_x11_display, screen, GLX_VENDOR );
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nkeynes@103 | 73 | INFO( "GLX version %d.%d, %s. Supported exts: %s", major, minor,
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nkeynes@103 | 74 | glxServer, glxExts );
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nkeynes@103 | 75 |
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nkeynes@103 | 76 | /* Find ourselves a nice visual */
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nkeynes@103 | 77 | visual = glXChooseVisual( video_x11_display,
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nkeynes@103 | 78 | screen,
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nkeynes@103 | 79 | visual_attrs );
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nkeynes@103 | 80 | if( visual == NULL ) {
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nkeynes@103 | 81 | ERROR( "Unable to obtain a compatible visual" );
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nkeynes@103 | 82 | return FALSE;
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nkeynes@103 | 83 | }
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nkeynes@103 | 84 |
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nkeynes@103 | 85 | /* And a matching gl context */
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nkeynes@103 | 86 | glx_context = glXCreateContext( video_x11_display, visual, None, True );
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nkeynes@103 | 87 | if( glx_context == NULL ) {
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nkeynes@103 | 88 | ERROR( "Unable to obtain a GLX Context. Possibly your system is broken in some small, undefineable way" );
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nkeynes@103 | 89 | return FALSE;
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nkeynes@103 | 90 | }
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nkeynes@103 | 91 |
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nkeynes@103 | 92 |
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nkeynes@103 | 93 | /* Ok, all good so far. Unfortunately the visual we need to use will
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nkeynes@103 | 94 | * almost certainly be different from the one our frame is using. Which
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nkeynes@103 | 95 | * means we have to jump through the following hoops to create a
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nkeynes@103 | 96 | * child window with the appropriate settings.
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nkeynes@103 | 97 | */
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nkeynes@103 | 98 | win_attrs.event_mask = 0;
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nkeynes@103 | 99 | win_attrs.colormap = XCreateColormap( video_x11_display,
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nkeynes@103 | 100 | RootWindowOfScreen(video_x11_screen),
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nkeynes@103 | 101 | visual->visual, AllocNone );
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nkeynes@103 | 102 | glx_window = XCreateWindow( video_x11_display, video_x11_window,
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nkeynes@103 | 103 | x, y, width, height, 0, visual->depth,
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nkeynes@103 | 104 | InputOutput, visual->visual,
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nkeynes@103 | 105 | CWColormap | CWEventMask,
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nkeynes@103 | 106 | &win_attrs );
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nkeynes@103 | 107 | if( glx_window == None ) {
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nkeynes@103 | 108 | /* Hrm. Aww, no window? */
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nkeynes@103 | 109 | ERROR( "Unable to create GLX window" );
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nkeynes@103 | 110 | glXDestroyContext( video_x11_display, glx_context );
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nkeynes@103 | 111 | if( win_attrs.colormap )
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nkeynes@103 | 112 | XFreeColormap( video_x11_display, win_attrs.colormap );
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nkeynes@103 | 113 | return FALSE;
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nkeynes@103 | 114 | }
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nkeynes@103 | 115 | XMapRaised( video_x11_display, glx_window );
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nkeynes@103 | 116 |
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nkeynes@103 | 117 | /* And finally set the window to be the active drawing area */
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nkeynes@103 | 118 | if( glXMakeCurrent( video_x11_display, glx_window, glx_context ) == False ) {
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nkeynes@103 | 119 | /* Ok you have _GOT_ to be kidding me */
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nkeynes@103 | 120 | ERROR( "Unable to prepare GLX window for drawing" );
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nkeynes@103 | 121 | XDestroyWindow( video_x11_display, glx_window );
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nkeynes@103 | 122 | XFreeColormap( video_x11_display, win_attrs.colormap );
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nkeynes@103 | 123 | glXDestroyContext( video_x11_display, glx_context );
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nkeynes@103 | 124 | return FALSE;
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nkeynes@103 | 125 | }
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nkeynes@103 | 126 |
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nkeynes@103 | 127 | glx_open = TRUE;
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nkeynes@103 | 128 | return TRUE;
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nkeynes@103 | 129 | }
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nkeynes@103 | 130 |
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nkeynes@108 | 131 | int video_glx_load_font( const gchar *font_name )
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nkeynes@108 | 132 | {
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nkeynes@108 | 133 | int lists;
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nkeynes@108 | 134 | XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
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nkeynes@108 | 135 | if (font == NULL)
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nkeynes@108 | 136 | return -1;
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nkeynes@108 | 137 |
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nkeynes@108 | 138 | lists = glGenLists(96);
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nkeynes@108 | 139 | glXUseXFont(font->fid, 32, 96, lists);
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nkeynes@108 | 140 | XFreeFont(video_x11_display, font);
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nkeynes@108 | 141 | }
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nkeynes@108 | 142 |
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nkeynes@108 | 143 |
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nkeynes@108 | 144 |
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nkeynes@108 | 145 | gboolean video_glx_set_render_format( int x, int y, int width, int height )
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nkeynes@108 | 146 | {
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nkeynes@108 | 147 | if( glx_open )
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nkeynes@108 | 148 | return TRUE;
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nkeynes@108 | 149 | return video_glx_create_window( x, y, width, height );
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nkeynes@108 | 150 | }
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nkeynes@108 | 151 |
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nkeynes@112 | 152 | gboolean video_glx_display_frame( video_buffer_t frame )
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nkeynes@112 | 153 | {
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nkeynes@112 | 154 | GLenum type, format = GL_RGB;
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nkeynes@112 | 155 | switch( frame->colour_format ) {
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nkeynes@112 | 156 | case COLFMT_RGB565:
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nkeynes@112 | 157 | type = GL_UNSIGNED_SHORT_5_6_5;
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nkeynes@112 | 158 | break;
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nkeynes@112 | 159 | case COLFMT_RGB888:
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nkeynes@112 | 160 | type = GL_UNSIGNED_BYTE;
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nkeynes@112 | 161 | break;
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nkeynes@112 | 162 | case COLFMT_ARGB1555:
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nkeynes@112 | 163 | type = GL_UNSIGNED_SHORT_5_5_5_1;
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nkeynes@112 | 164 | break;
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nkeynes@112 | 165 | case COLFMT_ARGB8888:
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nkeynes@112 | 166 | format = GL_BGRA;
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nkeynes@112 | 167 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@112 | 168 | break;
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nkeynes@112 | 169 | }
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nkeynes@112 | 170 | glDrawBuffer( GL_FRONT );
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nkeynes@112 | 171 | glViewport( 0, 0, frame->hres, frame->vres );
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nkeynes@112 | 172 | glMatrixMode(GL_PROJECTION);
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nkeynes@112 | 173 | glLoadIdentity();
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nkeynes@112 | 174 | glOrtho( 0, frame->hres, frame->vres, 0, 0, -65535 );
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nkeynes@112 | 175 | glMatrixMode(GL_MODELVIEW);
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nkeynes@112 | 176 | glLoadIdentity();
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nkeynes@112 | 177 | glRasterPos2i( 0, 0 );
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nkeynes@112 | 178 | glPixelZoom( 1.0f, -1.0f );
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nkeynes@112 | 179 | glDrawPixels( frame->hres, frame->vres, format, type,
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nkeynes@112 | 180 | frame->data );
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nkeynes@112 | 181 | glFlush();
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nkeynes@112 | 182 | return TRUE;
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nkeynes@112 | 183 | }
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nkeynes@112 | 184 |
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nkeynes@160 | 185 | gboolean video_glx_blank( int width, int height, uint32_t colour )
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nkeynes@160 | 186 | {
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nkeynes@160 | 187 | glDrawBuffer( GL_FRONT );
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nkeynes@160 | 188 | glViewport( 0, 0, width, height );
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nkeynes@160 | 189 | glMatrixMode( GL_PROJECTION );
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nkeynes@160 | 190 | glLoadIdentity();
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nkeynes@160 | 191 | glOrtho( 0, width, height, 0, 0, -65535 );
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nkeynes@160 | 192 | glMatrixMode(GL_MODELVIEW);
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nkeynes@160 | 193 | glLoadIdentity();
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nkeynes@160 | 194 | glColor3b( (colour >> 16) & 0xFF, (colour >> 8) & 0xFF, colour & 0xFF );
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nkeynes@160 | 195 | glRecti(0,0, width, height );
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nkeynes@160 | 196 | glFlush();
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nkeynes@160 | 197 | return TRUE;
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nkeynes@160 | 198 | }
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nkeynes@160 | 199 |
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nkeynes@103 | 200 | void video_glx_swap_buffers( void )
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nkeynes@103 | 201 | {
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nkeynes@103 | 202 | glXSwapBuffers( video_x11_display, glx_window );
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nkeynes@103 | 203 | }
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nkeynes@103 | 204 |
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nkeynes@103 | 205 | void video_glx_create_pixmap( int width, int height )
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nkeynes@103 | 206 | {
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nkeynes@103 | 207 |
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nkeynes@103 | 208 | }
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