2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 // OpenGL widget based on GtkGLExt
26 #include "debugging/debugging.h"
30 #include <gtk/gtkdrawingarea.h>
31 #include <gtk/gtkglwidget.h>
35 void ( *GLWidget_sharedContextCreated )() = 0;
36 void ( *GLWidget_sharedContextDestroyed )() = 0;
39 typedef int* attribs_t;
45 typedef const config_t* configs_iterator;
47 int config_rgba32[] = {
50 GDK_GL_BUFFER_SIZE, 24,
51 GDK_GL_ATTRIB_LIST_NONE,
57 GDK_GL_BUFFER_SIZE, 16,
58 GDK_GL_ATTRIB_LIST_NONE,
61 const config_t configs[] = {
63 "colour-buffer = 32bpp, depth-buffer = none",
67 "colour-buffer = 16bpp, depth-buffer = none",
72 GdkGLConfig* glconfig_new(){
73 GdkGLConfig* glconfig = 0;
75 for ( configs_iterator i = configs, end = configs + 2; i != end; ++i )
77 glconfig = gdk_gl_config_new( ( *i ).attribs );
78 if ( glconfig != 0 ) {
79 globalOutputStream() << "OpenGL window configuration: " << ( *i ).name << "\n";
84 globalOutputStream() << "OpenGL window configuration: colour-buffer = auto, depth-buffer = none\n";
85 return gdk_gl_config_new_by_mode( (GdkGLConfigMode)( GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE ) );
88 int config_rgba32_depth32[] = {
91 GDK_GL_BUFFER_SIZE, 24,
92 GDK_GL_DEPTH_SIZE, 32,
93 GDK_GL_ATTRIB_LIST_NONE,
96 int config_rgba32_depth24[] = {
99 GDK_GL_BUFFER_SIZE, 24,
100 GDK_GL_DEPTH_SIZE, 24,
101 GDK_GL_ATTRIB_LIST_NONE,
104 int config_rgba32_depth16[] = {
107 GDK_GL_BUFFER_SIZE, 24,
108 GDK_GL_DEPTH_SIZE, 16,
109 GDK_GL_ATTRIB_LIST_NONE,
112 int config_rgba32_depth[] = {
115 GDK_GL_BUFFER_SIZE, 24,
116 GDK_GL_DEPTH_SIZE, 1,
117 GDK_GL_ATTRIB_LIST_NONE,
120 int config_rgba_depth16[] = {
123 GDK_GL_BUFFER_SIZE, 16,
124 GDK_GL_DEPTH_SIZE, 16,
125 GDK_GL_ATTRIB_LIST_NONE,
128 int config_rgba_depth[] = {
131 GDK_GL_BUFFER_SIZE, 16,
132 GDK_GL_DEPTH_SIZE, 1,
133 GDK_GL_ATTRIB_LIST_NONE,
136 const config_t configs_with_depth[] =
139 "colour-buffer = 32bpp, depth-buffer = 32bpp",
140 config_rgba32_depth32,
143 "colour-buffer = 32bpp, depth-buffer = 24bpp",
144 config_rgba32_depth24,
147 "colour-buffer = 32bpp, depth-buffer = 16bpp",
148 config_rgba32_depth16,
151 "colour-buffer = 32bpp, depth-buffer = auto",
155 "colour-buffer = 16bpp, depth-buffer = 16bpp",
159 "colour-buffer = auto, depth-buffer = auto",
164 GdkGLConfig* glconfig_new_with_depth(){
165 GdkGLConfig* glconfig = 0;
167 for ( configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end; ++i )
169 glconfig = gdk_gl_config_new( ( *i ).attribs );
170 if ( glconfig != 0 ) {
171 globalOutputStream() << "OpenGL window configuration: " << ( *i ).name << "\n";
176 globalOutputStream() << "OpenGL window configuration: colour-buffer = auto, depth-buffer = auto (fallback)\n";
177 return gdk_gl_config_new_by_mode( (GdkGLConfigMode)( GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH ) );
180 unsigned int g_context_count = 0;
184 GtkWidget* g_shared = 0;
187 gint glwidget_context_created( GtkWidget* widget, gpointer data ){
188 if ( ++g_context_count == 1 ) {
190 gtk_widget_ref( g_shared );
192 glwidget_make_current( g_shared );
193 GlobalOpenGL().contextValid = true;
195 GLWidget_sharedContextCreated();
200 gint glwidget_context_destroyed( GtkWidget* widget, gpointer data ){
201 if ( --g_context_count == 0 ) {
202 GlobalOpenGL().contextValid = false;
204 GLWidget_sharedContextDestroyed();
206 gtk_widget_unref( g_shared );
212 gboolean glwidget_enable_gl( GtkWidget* widget, GtkWidget* widget2, gpointer data ){
213 if ( widget2 == 0 && !gtk_widget_is_gl_capable( widget ) ) {
214 GdkGLConfig* glconfig = ( g_object_get_data( G_OBJECT( widget ), "zbuffer" ) ) ? glconfig_new_with_depth() : glconfig_new();
215 ASSERT_MESSAGE( glconfig != 0, "failed to create OpenGL config" );
217 gtk_widget_set_gl_capability( widget, glconfig, g_shared != 0 ? gtk_widget_get_gl_context( g_shared ) : 0, TRUE, GDK_GL_RGBA_TYPE );
219 gtk_widget_realize( widget );
220 if ( g_shared == 0 ) {
229 GtkWidget* glwidget_new( gboolean zbuffer ){
230 GtkWidget* widget = gtk_drawing_area_new();
232 g_object_set_data( G_OBJECT( widget ), "zbuffer", gint_to_pointer( zbuffer ) );
234 g_signal_connect( G_OBJECT( widget ), "hierarchy-changed", G_CALLBACK( glwidget_enable_gl ), 0 );
236 g_signal_connect( G_OBJECT( widget ), "realize", G_CALLBACK( glwidget_context_created ), 0 );
237 g_signal_connect( G_OBJECT( widget ), "unrealize", G_CALLBACK( glwidget_context_destroyed ), 0 );
242 void glwidget_destroy_context( GtkWidget *widget ){
245 void glwidget_create_context( GtkWidget *widget ){
248 void glwidget_swap_buffers( GtkWidget *widget ){
249 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable( widget );
250 gdk_gl_drawable_swap_buffers( gldrawable );
253 gboolean glwidget_make_current( GtkWidget *widget ){
254 GdkGLContext *glcontext = gtk_widget_get_gl_context( widget );
255 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable( widget );
256 return gdk_gl_drawable_gl_begin( gldrawable, glcontext );