From 5791712b89bda9d70987592620c659b7b9f2435b Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 13 Nov 2014 23:45:57 +0200
Subject: [PATCH] Use a shader for rendering if available

---
 source/root.cpp | 17 +++++++++++++++++
 source/root.h   |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/source/root.cpp b/source/root.cpp
index f4bad55..8b06f47 100644
--- a/source/root.cpp
+++ b/source/root.cpp
@@ -1,4 +1,7 @@
 #include <msp/gl/blend.h>
+#include <msp/gl/extensions/arb_shader_objects.h>
+#include <msp/gl/programbuilder.h>
+#include <msp/gl/uniform.h>
 #include <msp/input/keys.h>
 #include <msp/time/units.h>
 #include <msp/time/utils.h>
@@ -38,6 +41,18 @@ void Root::init(Graphics::Window *window)
 	camera.set_orthographic(geom.w, geom.h);
 	update_camera();
 
+	if(GL::ARB_shader_objects)
+	{
+		shprog = new GL::Program;
+		GL::ProgramBuilder::StandardFeatures features;
+		features.material = true;
+		features.texture = true;
+		GL::ProgramBuilder(features).add_shaders(*shprog);
+		shprog->link();
+	}
+	else
+		shprog = 0;
+
 	update_style();
 
 	if(mouse)
@@ -57,6 +72,7 @@ void Root::init(Graphics::Window *window)
 
 Root::~Root()
 {
+	delete shprog;
 	if(own_input)
 	{
 		delete keyboard;
@@ -115,6 +131,7 @@ void Root::render() const
 	GL::Bind bind_blend(GL::Blend::alpha());
 
 	GL::Renderer renderer(&camera);
+	renderer.set_shader_program(shprog);
 	Widget::render(renderer);
 }
 
diff --git a/source/root.h b/source/root.h
index b79bca3..8e1bed9 100644
--- a/source/root.h
+++ b/source/root.h
@@ -3,6 +3,7 @@
 
 #include <sigc++/trackable.h>
 #include <msp/gl/camera.h>
+#include <msp/gl/program.h>
 #include <msp/graphics/window.h>
 #include <msp/input/keyboard.h>
 #include <msp/input/mouse.h>
@@ -34,6 +35,7 @@ private:
 	Time::TimeStamp tooltip_timeout;
 	Widget *tooltip_target;
 	Msp::GL::Camera camera;
+	Msp::GL::Program *shprog;
 
 public:
 	/** Creates a Root widget for a window.  The geometry is set to match the
-- 
2.43.0