nkeynes@545 | 1 | /**
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nkeynes@586 | 2 | * $Id$
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nkeynes@545 | 3 | *
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nkeynes@545 | 4 | * Shared functions for all X11-based display drivers.
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nkeynes@545 | 5 | *
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nkeynes@545 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@545 | 7 | *
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nkeynes@545 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@545 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@545 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@545 | 11 | * (at your option) any later version.
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nkeynes@545 | 12 | *
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nkeynes@545 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@545 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@545 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@545 | 16 | * GNU General Public License for more details.
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nkeynes@545 | 17 | */
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nkeynes@545 | 18 |
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nkeynes@635 | 19 | #include <string.h>
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nkeynes@586 | 20 | #include "display.h"
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nkeynes@545 | 21 | #include <X11/Xlib.h>
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nkeynes@545 | 22 | #include <GL/glx.h>
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nkeynes@635 | 23 | #include "pvr2/pvr2.h"
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nkeynes@635 | 24 | #include "pvr2/glutil.h"
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nkeynes@545 | 25 | #include "drivers/video_glx.h"
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nkeynes@635 | 26 | #include "drivers/video_gl.h"
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nkeynes@545 | 27 |
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nkeynes@545 | 28 | /**
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nkeynes@545 | 29 | * General X11 parameters. The front-end driver is expected to set this up
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nkeynes@545 | 30 | * by calling video_glx_init after initializing itself.
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nkeynes@545 | 31 | */
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nkeynes@545 | 32 | Display *video_x11_display = NULL;
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nkeynes@545 | 33 | Window video_x11_window = 0;
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nkeynes@545 | 34 | static gboolean glsl_loaded = FALSE;
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nkeynes@545 | 35 |
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nkeynes@545 | 36 | static int glx_version = 100;
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nkeynes@606 | 37 | static XVisualInfo *glx_visual = NULL;
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nkeynes@545 | 38 | static GLXFBConfig glx_fbconfig;
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nkeynes@545 | 39 | static GLXContext glx_context = NULL;
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nkeynes@545 | 40 | static gboolean glx_is_initialized = FALSE;
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nkeynes@545 | 41 | static gboolean glx_fbconfig_supported = FALSE;
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nkeynes@545 | 42 | static gboolean glx_pbuffer_supported = FALSE;
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nkeynes@545 | 43 | static int glx_pbuffer_texture = 0;
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nkeynes@545 | 44 |
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nkeynes@545 | 45 | /* Prototypes for pbuffer support methods */
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nkeynes@545 | 46 | static void glx_pbuffer_init( display_driver_t driver );
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nkeynes@545 | 47 | static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height );
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nkeynes@545 | 48 | static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer );
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nkeynes@545 | 49 | static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer );
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nkeynes@545 | 50 | static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer );
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nkeynes@545 | 51 | static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer );
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nkeynes@545 | 52 | static gboolean glx_pbuffer_display_blank( uint32_t colour );
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nkeynes@545 | 53 | static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer, int rowstride, int format );
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nkeynes@545 | 54 |
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nkeynes@545 | 55 | /**
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nkeynes@545 | 56 | * Test if a specific extension is supported. From opengl.org
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nkeynes@545 | 57 | * @param extension extension name to check for
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nkeynes@545 | 58 | * @return TRUE if supported, otherwise FALSE.
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nkeynes@545 | 59 | */
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nkeynes@545 | 60 | gboolean isServerGLXExtensionSupported( Display *display, int screen,
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nkeynes@545 | 61 | const char *extension )
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nkeynes@545 | 62 | {
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nkeynes@545 | 63 | const char *extensions = NULL;
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nkeynes@545 | 64 | const char *start;
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nkeynes@545 | 65 | char *where, *terminator;
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nkeynes@545 | 66 |
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nkeynes@545 | 67 | /* Extension names should not have spaces. */
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nkeynes@545 | 68 | where = strchr(extension, ' ');
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nkeynes@545 | 69 | if (where || *extension == '\0')
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nkeynes@545 | 70 | return 0;
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nkeynes@545 | 71 | extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
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nkeynes@545 | 72 | start = extensions;
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nkeynes@545 | 73 | for (;;) {
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nkeynes@545 | 74 | where = strstr((const char *) start, extension);
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nkeynes@545 | 75 | if (!where)
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nkeynes@545 | 76 | break;
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nkeynes@545 | 77 | terminator = where + strlen(extension);
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nkeynes@545 | 78 | if (where == start || *(where - 1) == ' ')
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nkeynes@545 | 79 | if (*terminator == ' ' || *terminator == '\0')
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nkeynes@545 | 80 | return TRUE;
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nkeynes@545 | 81 | start = terminator;
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nkeynes@545 | 82 | }
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nkeynes@545 | 83 | return FALSE;
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nkeynes@545 | 84 | }
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nkeynes@545 | 85 |
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nkeynes@545 | 86 | gboolean video_glx_init( Display *display, int screen )
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nkeynes@545 | 87 | {
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nkeynes@545 | 88 | int major, minor;
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nkeynes@545 | 89 |
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nkeynes@545 | 90 | if( glx_is_initialized ) {
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nkeynes@545 | 91 | return TRUE;
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nkeynes@545 | 92 | }
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nkeynes@545 | 93 |
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nkeynes@545 | 94 | Bool result = glXQueryVersion( display, &major, &minor );
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nkeynes@545 | 95 | if( result != False ) {
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nkeynes@545 | 96 | glx_version = (major*100) + minor;
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nkeynes@545 | 97 | }
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nkeynes@545 | 98 |
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nkeynes@545 | 99 | glx_fbconfig_supported = (glx_version >= 103 ||
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nkeynes@545 | 100 | isServerGLXExtensionSupported(display, screen,
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nkeynes@545 | 101 | "GLX_SGIX_fbconfig") );
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nkeynes@545 | 102 | glx_pbuffer_supported = (glx_version >= 103 ||
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nkeynes@545 | 103 | isServerGLXExtensionSupported(display, screen,
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nkeynes@545 | 104 | "GLX_SGIX_pbuffer") );
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nkeynes@606 | 105 |
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nkeynes@545 | 106 | if( glx_fbconfig_supported ) {
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nkeynes@545 | 107 | int nelem;
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nkeynes@545 | 108 | int fb_attribs[] = { GLX_DRAWABLE_TYPE,
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nkeynes@545 | 109 | GLX_PBUFFER_BIT|GLX_WINDOW_BIT,
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nkeynes@545 | 110 | GLX_RENDER_TYPE, GLX_RGBA_BIT,
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nkeynes@545 | 111 | GLX_DEPTH_SIZE, 24, 0 };
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nkeynes@545 | 112 | GLXFBConfig *configs = glXChooseFBConfig( display, screen,
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nkeynes@545 | 113 | fb_attribs, &nelem );
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nkeynes@545 | 114 |
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nkeynes@545 | 115 | if( configs == NULL || nelem == 0 ) {
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nkeynes@545 | 116 | /* Didn't work. Fallback to 1.2 methods */
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nkeynes@545 | 117 | glx_fbconfig_supported = FALSE;
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nkeynes@545 | 118 | glx_pbuffer_supported = FALSE;
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nkeynes@545 | 119 | } else {
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nkeynes@545 | 120 | glx_fbconfig = configs[0];
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nkeynes@545 | 121 | glx_visual = glXGetVisualFromFBConfig(display, glx_fbconfig);
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nkeynes@545 | 122 | XFree(configs);
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nkeynes@545 | 123 | }
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nkeynes@545 | 124 | }
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nkeynes@545 | 125 |
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nkeynes@545 | 126 | if( !glx_fbconfig_supported ) {
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nkeynes@545 | 127 | int attribs[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, 0 };
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nkeynes@545 | 128 | glx_visual = glXChooseVisual( display, screen, attribs );
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nkeynes@545 | 129 | }
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nkeynes@606 | 130 |
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nkeynes@606 | 131 | if( glx_visual == NULL ) {
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nkeynes@606 | 132 | return FALSE;
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nkeynes@606 | 133 | }
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nkeynes@606 | 134 |
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nkeynes@545 | 135 | glx_is_initialized = TRUE;
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nkeynes@545 | 136 | return TRUE;
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nkeynes@545 | 137 | }
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nkeynes@545 | 138 |
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nkeynes@545 | 139 | gboolean video_glx_init_context( Display *display, Window window )
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nkeynes@545 | 140 | {
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nkeynes@545 | 141 | if( glx_fbconfig_supported ) {
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nkeynes@545 | 142 | glx_context = glXCreateNewContext( display, glx_fbconfig,
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nkeynes@545 | 143 | GLX_RGBA_TYPE, NULL, True );
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nkeynes@545 | 144 | if( glx_context == NULL ) {
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nkeynes@545 | 145 | ERROR( "Unable to create a GLX Context.");
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nkeynes@545 | 146 | return FALSE;
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nkeynes@545 | 147 | }
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nkeynes@545 | 148 |
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nkeynes@545 | 149 | if( glXMakeContextCurrent( display, window, window,
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nkeynes@545 | 150 | glx_context ) == False ) {
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nkeynes@545 | 151 | ERROR( "Unable to prepare GLX context for drawing" );
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nkeynes@545 | 152 | glXDestroyContext( display, glx_context );
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nkeynes@545 | 153 | return FALSE;
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nkeynes@545 | 154 | }
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nkeynes@545 | 155 | } else {
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nkeynes@545 | 156 | glx_context = glXCreateContext( display, glx_visual, None, True );
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nkeynes@545 | 157 | if( glx_context == NULL ) {
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nkeynes@545 | 158 | ERROR( "Unable to create a GLX Context.");
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nkeynes@545 | 159 | return FALSE;
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nkeynes@545 | 160 | }
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nkeynes@545 | 161 |
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nkeynes@545 | 162 | if( glXMakeCurrent( display, window, glx_context ) == False ) {
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nkeynes@545 | 163 | ERROR( "Unable to prepare GLX context for drawing" );
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nkeynes@545 | 164 | glXDestroyContext( display, glx_context );
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nkeynes@545 | 165 | return FALSE;
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nkeynes@545 | 166 | }
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nkeynes@545 | 167 | }
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nkeynes@545 | 168 |
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nkeynes@545 | 169 | if( !glXIsDirect(display, glx_context) ) {
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nkeynes@545 | 170 | WARN( "Not using direct rendering - this is likely to be slow" );
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nkeynes@545 | 171 | }
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nkeynes@545 | 172 |
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nkeynes@635 | 173 | if( glsl_is_supported() ) {
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nkeynes@635 | 174 | //if( !glsl_load_shaders( glsl_vertex_shader_src, glsl_fragment_shader_src ) ) {
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nkeynes@635 | 175 | if( !glsl_load_shaders( glsl_vertex_shader_src, NULL ) ) {
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nkeynes@635 | 176 | WARN( "Unable to load GL shaders" );
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nkeynes@635 | 177 | }
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nkeynes@635 | 178 | }
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nkeynes@635 | 179 |
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nkeynes@545 | 180 | texcache_gl_init();
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nkeynes@545 | 181 | video_x11_display = display;
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nkeynes@545 | 182 | video_x11_window = window;
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nkeynes@545 | 183 |
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nkeynes@545 | 184 | return TRUE;
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nkeynes@545 | 185 | }
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nkeynes@545 | 186 |
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nkeynes@545 | 187 | gboolean video_glx_init_driver( display_driver_t driver )
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nkeynes@545 | 188 | {
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nkeynes@545 | 189 | if( gl_fbo_is_supported() ) { // First preference
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nkeynes@545 | 190 | gl_fbo_init(driver);
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nkeynes@545 | 191 | } else if( glx_pbuffer_supported ) {
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nkeynes@545 | 192 | glx_pbuffer_init(driver);
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nkeynes@545 | 193 | } else {
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nkeynes@545 | 194 | ERROR( "Unable to create render buffers (requires either EXT_framebuffer_object or GLX 1.3+)" );
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nkeynes@545 | 195 | video_glx_shutdown();
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nkeynes@545 | 196 | return FALSE;
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nkeynes@545 | 197 | }
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nkeynes@545 | 198 | return TRUE;
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nkeynes@545 | 199 | }
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nkeynes@545 | 200 |
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nkeynes@545 | 201 |
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nkeynes@545 | 202 | void video_glx_shutdown()
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nkeynes@545 | 203 | {
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nkeynes@545 | 204 | // texcache_gl_shutdown();
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nkeynes@545 | 205 | glx_is_initialized = FALSE;
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nkeynes@545 | 206 | if( glx_context != NULL ) {
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nkeynes@545 | 207 | glXDestroyContext( video_x11_display, glx_context );
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nkeynes@545 | 208 | glx_context = NULL;
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nkeynes@545 | 209 | }
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nkeynes@545 | 210 | if( glx_visual != NULL ) {
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nkeynes@545 | 211 | XFree(glx_visual);
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nkeynes@545 | 212 | glx_visual = NULL;
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nkeynes@545 | 213 | }
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nkeynes@545 | 214 | }
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nkeynes@545 | 215 |
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nkeynes@545 | 216 |
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nkeynes@545 | 217 | XVisualInfo *video_glx_get_visual()
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nkeynes@545 | 218 | {
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nkeynes@545 | 219 | return glx_visual;
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nkeynes@545 | 220 | }
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nkeynes@545 | 221 |
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nkeynes@545 | 222 |
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nkeynes@545 | 223 | int video_glx_load_font( const gchar *font_name )
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nkeynes@545 | 224 | {
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nkeynes@545 | 225 | int lists;
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nkeynes@545 | 226 | XFontStruct *font = XLoadQueryFont(video_x11_display, font_name );
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nkeynes@545 | 227 | if (font == NULL)
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nkeynes@545 | 228 | return -1;
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nkeynes@545 | 229 |
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nkeynes@545 | 230 | lists = glGenLists(96);
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nkeynes@545 | 231 | glXUseXFont(font->fid, 32, 96, lists);
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nkeynes@545 | 232 | XFreeFont(video_x11_display, font);
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nkeynes@545 | 233 | return lists;
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nkeynes@545 | 234 | }
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nkeynes@545 | 235 |
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nkeynes@545 | 236 |
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nkeynes@545 | 237 | void video_glx_swap_buffers( void )
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nkeynes@545 | 238 | {
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nkeynes@545 | 239 | glXSwapBuffers( video_x11_display, video_x11_window );
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nkeynes@545 | 240 | }
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nkeynes@545 | 241 |
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nkeynes@545 | 242 | void video_glx_make_window_current( void )
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nkeynes@545 | 243 | {
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nkeynes@545 | 244 | glXMakeCurrent( video_x11_display, video_x11_window, glx_context );
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nkeynes@545 | 245 | }
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nkeynes@545 | 246 |
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nkeynes@545 | 247 |
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nkeynes@545 | 248 | // Pbuffer support
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nkeynes@545 | 249 |
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nkeynes@545 | 250 | /**
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nkeynes@545 | 251 | * Construct the initial frame buffers and allocate ids for everything.
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nkeynes@545 | 252 | * The render handling driver methods are set to the fbo versions.
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nkeynes@545 | 253 | */
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nkeynes@545 | 254 | static void glx_pbuffer_init( display_driver_t driver )
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nkeynes@545 | 255 | {
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nkeynes@545 | 256 | glGenTextures( 1, &glx_pbuffer_texture );
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nkeynes@545 | 257 | driver->create_render_buffer = glx_pbuffer_create_render_buffer;
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nkeynes@545 | 258 | driver->destroy_render_buffer = glx_pbuffer_destroy_render_buffer;
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nkeynes@545 | 259 | driver->set_render_target = glx_pbuffer_set_render_target;
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nkeynes@545 | 260 | driver->display_render_buffer = glx_pbuffer_display_render_buffer;
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nkeynes@545 | 261 | driver->load_frame_buffer = glx_pbuffer_load_frame_buffer;
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nkeynes@545 | 262 | driver->display_blank = glx_pbuffer_display_blank;
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nkeynes@545 | 263 | driver->read_render_buffer = glx_pbuffer_read_render_buffer;
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nkeynes@545 | 264 | }
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nkeynes@545 | 265 |
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nkeynes@545 | 266 | void glx_pbuffer_shutdown()
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nkeynes@545 | 267 | {
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nkeynes@545 | 268 | glDeleteTextures( 1, &glx_pbuffer_texture );
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nkeynes@545 | 269 | }
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nkeynes@545 | 270 |
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nkeynes@545 | 271 | static render_buffer_t glx_pbuffer_create_render_buffer( uint32_t width, uint32_t height )
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nkeynes@545 | 272 | {
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nkeynes@545 | 273 | int attribs[] = { GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height,
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nkeynes@545 | 274 | GLX_PRESERVED_CONTENTS, True, 0 };
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nkeynes@545 | 275 | GLXPbuffer pb = glXCreatePbuffer( video_x11_display, glx_fbconfig, attribs );
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nkeynes@545 | 276 | if( pb == (GLXPbuffer)NULL ) {
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nkeynes@545 | 277 | ERROR( "Unable to create pbuffer" );
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nkeynes@545 | 278 | return NULL;
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nkeynes@545 | 279 | }
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nkeynes@545 | 280 | render_buffer_t buffer = calloc( sizeof(struct render_buffer), 1 );
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nkeynes@545 | 281 | buffer->width = width;
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nkeynes@545 | 282 | buffer->height = height;
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nkeynes@545 | 283 | buffer->buf_id = pb;
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nkeynes@545 | 284 | return buffer;
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nkeynes@545 | 285 | }
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nkeynes@545 | 286 |
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nkeynes@545 | 287 | static void glx_pbuffer_destroy_render_buffer( render_buffer_t buffer )
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nkeynes@545 | 288 | {
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nkeynes@545 | 289 | glXDestroyPbuffer( video_x11_display, (GLXPbuffer)buffer->buf_id );
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nkeynes@545 | 290 | buffer->buf_id = 0;
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nkeynes@545 | 291 | free( buffer );
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nkeynes@545 | 292 | }
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nkeynes@545 | 293 |
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nkeynes@545 | 294 | static gboolean glx_pbuffer_set_render_target( render_buffer_t buffer )
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nkeynes@545 | 295 | {
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nkeynes@545 | 296 | glFinish();
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nkeynes@545 | 297 | if( glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context ) == False ) {
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nkeynes@545 | 298 | ERROR( "Make context current (pbuffer) failed!" );
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nkeynes@545 | 299 | }
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nkeynes@545 | 300 | /* setup the gl context */
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nkeynes@545 | 301 | glViewport( 0, 0, buffer->width, buffer->height );
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nkeynes@545 | 302 | glDrawBuffer(GL_FRONT);
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nkeynes@545 | 303 |
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nkeynes@545 | 304 | return TRUE;
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nkeynes@545 | 305 | }
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nkeynes@545 | 306 |
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nkeynes@545 | 307 | /**
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nkeynes@545 | 308 | * Render the texture holding the given buffer to the front window
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nkeynes@545 | 309 | * buffer.
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nkeynes@545 | 310 | */
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nkeynes@545 | 311 | static gboolean glx_pbuffer_display_render_buffer( render_buffer_t buffer )
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nkeynes@545 | 312 | {
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nkeynes@545 | 313 | glFinish();
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nkeynes@545 | 314 | glReadBuffer( GL_FRONT );
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nkeynes@545 | 315 | glDrawBuffer( GL_FRONT );
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nkeynes@545 | 316 | glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
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nkeynes@545 | 317 | glBindTexture( GL_TEXTURE_RECTANGLE_ARB, glx_pbuffer_texture );
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nkeynes@545 | 318 | glCopyTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, 0, 0, buffer->width, buffer->height, 0 );
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nkeynes@545 | 319 | video_glx_make_window_current();
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nkeynes@545 | 320 | gl_texture_window( buffer->width, buffer->height, glx_pbuffer_texture, buffer->inverted );
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nkeynes@545 | 321 | return TRUE;
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nkeynes@545 | 322 | }
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nkeynes@545 | 323 |
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nkeynes@545 | 324 | static void glx_pbuffer_load_frame_buffer( frame_buffer_t frame, render_buffer_t buffer )
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nkeynes@545 | 325 | {
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nkeynes@545 | 326 | glFinish();
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nkeynes@545 | 327 | glXMakeContextCurrent( video_x11_display, (GLXPbuffer)buffer->buf_id, (GLXPbuffer)buffer->buf_id, glx_context );
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nkeynes@545 | 328 | GLenum type = colour_formats[frame->colour_format].type;
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nkeynes@545 | 329 | GLenum format = colour_formats[frame->colour_format].format;
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nkeynes@545 | 330 | int bpp = colour_formats[frame->colour_format].bpp;
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nkeynes@545 | 331 | int rowstride = (frame->rowstride / bpp) - frame->width;
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nkeynes@545 | 332 |
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nkeynes@545 | 333 | gl_reset_state();
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nkeynes@545 | 334 | glPixelStorei( GL_UNPACK_ROW_LENGTH, rowstride );
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nkeynes@545 | 335 | glRasterPos2f(0.375, frame->height-0.375);
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nkeynes@545 | 336 | glPixelZoom( 1.0, 1.0 );
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nkeynes@545 | 337 | glDrawPixels( frame->width, frame->height, format, type, frame->data );
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nkeynes@545 | 338 | glFlush();
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nkeynes@545 | 339 | }
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nkeynes@545 | 340 |
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nkeynes@545 | 341 | static gboolean glx_pbuffer_display_blank( uint32_t colour )
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nkeynes@545 | 342 | {
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nkeynes@545 | 343 | glFinish();
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nkeynes@545 | 344 | video_glx_make_window_current();
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nkeynes@545 | 345 | return gl_display_blank( colour );
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nkeynes@545 | 346 | }
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nkeynes@545 | 347 |
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nkeynes@545 | 348 | static gboolean glx_pbuffer_read_render_buffer( unsigned char *target, render_buffer_t buffer,
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nkeynes@545 | 349 | int rowstride, int format )
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nkeynes@545 | 350 | {
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nkeynes@545 | 351 | glXMakeCurrent( video_x11_display, (GLXDrawable)buffer->buf_id, glx_context );
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nkeynes@545 | 352 | glReadBuffer( GL_FRONT );
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nkeynes@545 | 353 | return gl_read_render_buffer( target, buffer, rowstride, format );
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nkeynes@545 | 354 | }
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nkeynes@545 | 355 |
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nkeynes@545 | 356 |
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