Init earlier on

[grits] / src / grits-opengl.c

diff --git a/src/grits-opengl.c b/src/grits-opengl.c
index 774c75725f02e628945fed7e389cf533e00adc92..fef05a77bed6688d1cb044c127eb61c8163219d0 100644 (file)
--- a/src/grits-opengl.c
+++ b/src/grits-opengl.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
+ * Copyright (C) 2009-2011 Andy Spencer <andy753421@gmail.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,7 +24,7 @@
  * algorithm for updating surface mesh the planet. The only thing GritsOpenGL
  * can actually render on it's own is a wireframe of a sphere.
  *
- * GritsOpenGL requires (at least) OpenGL 2.0.
+ * GritsOpenGL relies on #GtkGlExt and requires (at least) OpenGL 2.0.
  */
 
 #include <config.h>
@@ -32,14 +32,16 @@
 #include <string.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
 #include <GL/gl.h>
 #include <GL/glu.h>
 
 #include "grits-opengl.h"
 #include "grits-util.h"
-#include "gtkgl.h"
 #include "roam.h"
 
+static GdkGLConfig *glconfig;
+
 // #define ROAM_DEBUG
 
 /* Tessellation, "finding intersecting triangles" */
@@ -223,7 +225,8 @@ static gboolean on_expose(GritsOpenGL *opengl, GdkEventExpose *event, gpointer _
        g_mutex_unlock(opengl->objects_lock);
 #endif
 
-       gtk_gl_end(GTK_WIDGET(opengl));
+       GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
+       gdk_gl_drawable_swap_buffers(gldrawable);
 
        g_debug("GritsOpenGL: on_expose - end\n");
        return FALSE;
@@ -342,7 +345,12 @@ static gboolean on_idle(GritsOpenGL *opengl)
 static void on_realize(GritsOpenGL *opengl, gpointer _)
 {
        g_debug("GritsOpenGL: on_realize");
-       gtk_gl_begin(GTK_WIDGET(opengl));
+
+       /* Start OpenGL */
+       GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(opengl));
+       GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(opengl));
+       if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
+               g_assert_not_reached();
 
        /* Connect signals and idle functions now that opengl is fully initialized */
        gtk_widget_add_events(GTK_WIDGET(opengl), GDK_KEY_PRESS_MASK);
@@ -521,6 +529,19 @@ static void _objects_free(gpointer value)
 }
 
 G_DEFINE_TYPE(GritsOpenGL, grits_opengl, GRITS_TYPE_VIEWER);
+void grits_init(int *argc, char ***argv)
+{
+       glconfig = gdk_gl_config_new_by_mode(
+                       GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
+                       GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
+       if (!glconfig) {
+               g_warning("Failed to create glconfig, unsupported:%s%s%s%s.",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_RGBA)   ? "" : " RGBA",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_DEPTH)  ? "" : " DEPTH",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_DOUBLE) ? "" : " DOUBLE",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_ALPHA)  ? "" : " ALPHA");
+       }
+}
 static void grits_opengl_init(GritsOpenGL *opengl)
 {
        g_debug("GritsOpenGL: init");
@@ -528,7 +549,25 @@ static void grits_opengl_init(GritsOpenGL *opengl)
        opengl->objects_lock = g_mutex_new();
        opengl->sphere       = roam_sphere_new(opengl);
        opengl->sphere_lock  = g_mutex_new();
-       gtk_gl_enable(GTK_WIDGET(opengl));
+
+       /* Set OpenGL before "realize" */
+       if (!glconfig) {
+               g_warning("recreating glconfig");
+               glconfig = gdk_gl_config_new_by_mode(
+                               GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
+                               GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
+       }
+       if (!glconfig)
+               g_error("Failed to create glconfig, unsupported:%s%s%s%s.",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_RGBA)   ? "" : " RGBA",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_DEPTH)  ? "" : " DEPTH",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_DOUBLE) ? "" : " DEPTH",
+                       gdk_gl_config_new_by_mode(GDK_GL_MODE_ALPHA)  ? "" : " ALPHA");
+       if (!gtk_widget_set_gl_capability(GTK_WIDGET(opengl),
+                               glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
+               g_error("GL lacks required capabilities");
+
+       /* Finish OpenGL init after it's realized */
        g_signal_connect(opengl, "realize", G_CALLBACK(on_realize), NULL);
 }
 static void grits_opengl_dispose(GObject *_opengl)