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91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
//
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// GlowEffect.h
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// interface/src/renderer
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//
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// Created by Andrzej Kapolka on 8/7/13.
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// Copyright 2013 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#ifndef hifi_GlowEffect_h
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#define hifi_GlowEffect_h
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#include <gpu/GPUConfig.h>
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#include <gpu/Framebuffer.h>
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#include <QObject>
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#include <QGLWidget>
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#include <QStack>
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#include <DependencyManager.h>
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class ProgramObject;
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/// A generic full screen glow effect.
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class GlowEffect : public QObject, public Dependency {
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Q_OBJECT
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SINGLETON_DEPENDENCY
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public:
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/// Returns a pointer to the framebuffer object that the glow effect is *not* using for persistent state
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/// (either the secondary or the tertiary).
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gpu::FramebufferPointer getFreeFramebuffer() const;
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void init(bool enabled);
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/// Prepares the glow effect for rendering the current frame. To be called before rendering the scene.
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void prepare();
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/// Starts using the glow effect.
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/// \param intensity the desired glow intensity, from zero to one
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void begin(float intensity = 1.0f);
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/// Stops using the glow effect.
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void end();
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/// Returns the current glow intensity.
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float getIntensity() const { return _intensity; }
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/// Renders the glow effect. To be called after rendering the scene.
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/// \param toTexture whether to render to a texture, rather than to the frame buffer
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/// \return the framebuffer object to which we rendered, or NULL if to the frame buffer
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gpu::FramebufferPointer render(bool toTexture = false);
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public slots:
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void toggleGlowEffect(bool enabled);
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private:
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GlowEffect();
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virtual ~GlowEffect();
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bool _initialized;
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ProgramObject* _addProgram;
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ProgramObject* _horizontalBlurProgram;
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ProgramObject* _verticalBlurAddProgram;
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ProgramObject* _verticalBlurProgram;
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ProgramObject* _addSeparateProgram;
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ProgramObject* _diffuseProgram;
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int _diffusionScaleLocation;
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bool _isEmpty; ///< set when nothing in the scene is currently glowing
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bool _isOddFrame; ///< controls the alternation between texture targets in diffuse add mode
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bool _isFirstFrame; ///< for persistent modes, notes whether this is the first frame rendered
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float _intensity;
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QStack<float> _intensityStack;
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bool _enabled;
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};
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/// RAII-style glow handler. Applies glow when in scope.
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class Glower {
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public:
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Glower(float amount = 1.0f);
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~Glower();
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};
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#endif // hifi_GlowEffect_h
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