--- /dev/null
+/*
+Copyright (C) 2001-2006, William Joseph.
+All Rights Reserved.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+// OpenGL widget based on GtkGLExt
+
+#include "glwidget.h"
+
+#include "debugging/debugging.h"
+
+#include "igl.h"
+
+#include <gtk/gtkdrawingarea.h>
+#include <gtk/gtkglwidget.h>
+
+#include "pointer.h"
+
+void (*GLWidget_sharedContextCreated)() = 0;
+void (*GLWidget_sharedContextDestroyed)() = 0;
+
+
+typedef int* attribs_t;
+struct config_t
+{
+ const char* name;
+ attribs_t attribs;
+};
+typedef const config_t* configs_iterator;
+
+int config_rgba32[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 24,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+const config_t configs[] = {
+ {
+ "colour-buffer = 32bpp, depth-buffer = none",
+ config_rgba32,
+ },
+ {
+ "colour-buffer = 16bpp, depth-buffer = none",
+ config_rgba,
+ }
+};
+
+GdkGLConfig* glconfig_new()
+{
+ GdkGLConfig* glconfig = 0;
+
+ for(configs_iterator i = configs, end = configs + 2; i != end; ++i)
+ {
+ glconfig = gdk_gl_config_new((*i).attribs);
+ if(glconfig != 0)
+ {
+ globalOutputStream() << "OpenGL window configuration: " << (*i).name << "\n";
+ return glconfig;
+ }
+ }
+
+ globalOutputStream() << "OpenGL window configuration: colour-buffer = auto, depth-buffer = none\n";
+ return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE));
+}
+
+int config_rgba32_depth32[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 24,
+ GDK_GL_DEPTH_SIZE, 32,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth24[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 24,
+ GDK_GL_DEPTH_SIZE, 24,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth16[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 24,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 24,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba_depth16[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 16,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba_depth[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_BUFFER_SIZE, 16,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+const config_t configs_with_depth[] =
+{
+ {
+ "colour-buffer = 32bpp, depth-buffer = 32bpp",
+ config_rgba32_depth32,
+ },
+ {
+ "colour-buffer = 32bpp, depth-buffer = 24bpp",
+ config_rgba32_depth24,
+ },
+ {
+ "colour-buffer = 32bpp, depth-buffer = 16bpp",
+ config_rgba32_depth16,
+ },
+ {
+ "colour-buffer = 32bpp, depth-buffer = auto",
+ config_rgba32_depth,
+ },
+ {
+ "colour-buffer = 16bpp, depth-buffer = 16bpp",
+ config_rgba_depth16,
+ },
+ {
+ "colour-buffer = auto, depth-buffer = auto",
+ config_rgba_depth,
+ },
+};
+
+GdkGLConfig* glconfig_new_with_depth()
+{
+ GdkGLConfig* glconfig = 0;
+
+ for(configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end; ++i)
+ {
+ glconfig = gdk_gl_config_new((*i).attribs);
+ if(glconfig != 0)
+ {
+ globalOutputStream() << "OpenGL window configuration: " << (*i).name << "\n";
+ return glconfig;
+ }
+ }
+
+ globalOutputStream() << "OpenGL window configuration: colour-buffer = auto, depth-buffer = auto (fallback)\n";
+ return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH));
+}
+
+unsigned int g_context_count = 0;
+
+namespace
+{
+ GtkWidget* g_shared = 0;
+}
+
+gint glwidget_context_created(GtkWidget* widget, gpointer data)
+{
+ if(++g_context_count == 1)
+ {
+ g_shared = widget;
+ gtk_widget_ref(g_shared);
+
+ glwidget_make_current(g_shared);
+ GlobalOpenGL().contextValid = true;
+
+ GLWidget_sharedContextCreated();
+ }
+ return FALSE;
+}
+
+gint glwidget_context_destroyed(GtkWidget* widget, gpointer data)
+{
+ if(--g_context_count == 0)
+ {
+ GlobalOpenGL().contextValid = false;
+
+ GLWidget_sharedContextDestroyed();
+
+ gtk_widget_unref(g_shared);
+ g_shared = 0;
+ }
+ return FALSE;
+}
+
+gboolean glwidget_enable_gl(GtkWidget* widget, GtkWidget* widget2, gpointer data)
+{
+ if(widget2 == 0 && !gtk_widget_is_gl_capable(widget))
+ {
+ GdkGLConfig* glconfig = (g_object_get_data(G_OBJECT(widget), "zbuffer")) ? glconfig_new_with_depth() : glconfig_new();
+ ASSERT_MESSAGE(glconfig != 0, "failed to create OpenGL config");
+
+ gtk_widget_set_gl_capability(widget, glconfig, g_shared != 0 ? gtk_widget_get_gl_context(g_shared) : 0, TRUE, GDK_GL_RGBA_TYPE);
+
+ gtk_widget_realize(widget);
+ if(g_shared == 0)
+ {
+ g_shared = widget;
+ }
+
+ // free glconfig?
+ }
+ return FALSE;
+}
+
+GtkWidget* glwidget_new(gboolean zbuffer)
+{
+ GtkWidget* widget = gtk_drawing_area_new();
+
+ g_object_set_data(G_OBJECT(widget), "zbuffer", gint_to_pointer(zbuffer));
+
+ g_signal_connect(G_OBJECT(widget), "hierarchy-changed", G_CALLBACK(glwidget_enable_gl), 0);
+
+ g_signal_connect(G_OBJECT(widget), "realize", G_CALLBACK(glwidget_context_created), 0);
+ g_signal_connect(G_OBJECT(widget), "unrealize", G_CALLBACK(glwidget_context_destroyed), 0);
+
+ return widget;
+}
+
+void glwidget_destroy_context (GtkWidget *widget)
+{
+}
+
+void glwidget_create_context (GtkWidget *widget)
+{
+}
+
+void glwidget_swap_buffers (GtkWidget *widget)
+{
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
+ gdk_gl_drawable_swap_buffers (gldrawable);
+}
+
+gboolean glwidget_make_current (GtkWidget *widget)
+{
+ GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
+ return gdk_gl_drawable_gl_begin (gldrawable, glcontext);
+}
+
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