Add a render method to Root that takes care of proper matrices

[libs/gltk.git] / source / root.cpp

diff --git a/source/root.cpp b/source/root.cpp
index fbb4cc6e5efc887539228a79f0d2999240ba0bf2..17416469fbb7961bc5c5ca6bb66973cda0a0fa14 100644 (file)
--- a/source/root.cpp
+++ b/source/root.cpp
@@ -5,6 +5,7 @@ Copyright © 2007-2009  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
+#include <msp/gl/blend.h>
 #include <msp/input/keys.h>
 #include <msp/time/units.h>
 #include <msp/time/utils.h>
@@ -78,6 +79,15 @@ void Root::tick()
        }
 }
 
+void Root::render() const
+{
+       GL::MatrixStack::projection() = GL::Matrix::ortho_bottomleft(geom.w, geom.h);
+       GL::MatrixStack::modelview() = GL::Matrix();
+       GL::Bind bind_blend(GL::Blend::alpha());
+
+       Widget::render();
+}
+
 void Root::button_press_event(int x, int y, unsigned btn, unsigned mod)
 {
        if(visible)