1 files changed, 88 insertions, 0 deletions
diff --git a/examples/shader/Effect.hpp b/examples/shader/Effect.hpp
new file mode 100644
index 0000000..ce29c47
--- /dev/null
+++ b/examples/shader/Effect.hpp
@@ -0,0 +1,88 @@
+#ifndef EFFECT_HPP
+#define EFFECT_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Graphics.hpp>
+#include <cassert>
+#include <string>
+
+
+////////////////////////////////////////////////////////////
+// Base class for effects
+////////////////////////////////////////////////////////////
+class Effect : public sf::Drawable
+{
+public :
+
+    virtual ~Effect()
+    {
+    }
+
+    static void setFont(const sf::Font& font)
+    {
+        s_font = &font;
+    }
+
+    const std::string& getName() const
+    {
+        return m_name;
+    }
+
+    void load()
+    {
+        m_isLoaded = sf::Shader::isAvailable() && onLoad();
+    }
+
+    void update(float time, float x, float y)
+    {
+        if (m_isLoaded)
+            onUpdate(time, x, y);
+    }
+
+    void draw(sf::RenderTarget& target, sf::RenderStates states) const
+    {
+        if (m_isLoaded)
+        {
+            onDraw(target, states);
+        }
+        else
+        {
+            sf::Text error("Shader not\nsupported", getFont());
+            error.setPosition(320.f, 200.f);
+            error.setCharacterSize(36);
+            target.draw(error, states);
+        }
+    }
+
+protected :
+
+    Effect(const std::string& name) :
+    m_name(name),
+    m_isLoaded(false)
+    {
+    }
+
+    static const sf::Font& getFont()
+    {
+        assert(s_font != NULL);
+        return *s_font;
+    }
+
+private :
+
+    // Virtual functions to be implemented in derived effects
+    virtual bool onLoad() = 0;
+    virtual void onUpdate(float time, float x, float y) = 0;
+    virtual void onDraw(sf::RenderTarget& target, sf::RenderStates states) const = 0;
+
+private :
+
+    std::string m_name;
+    bool m_isLoaded;
+
+    static const sf::Font* s_font;
+};
+
+#endif // EFFECT_HPP