offscreeneffect.h

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/*
    SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "effect/effect.h"
#include "scene/itemgeometry.h"
 
namespace KWin
{
 
class GLShader;
class OffscreenEffectPrivate;
class CrossFadeEffectPrivate;
class ShaderEffectPrivate;
 
class KWIN_EXPORT OffscreenEffect : public Effect
{
    Q_OBJECT
 
public:
    explicit OffscreenEffect(QObject *parent = nullptr);
    ~OffscreenEffect() override;
 
    static bool supported();
 
protected:
    void drawWindow(const RenderTarget &renderTarget, const RenderViewport &viewport, EffectWindow *window, int mask, const QRegion &region, WindowPaintData &data) override;
 
    void redirect(EffectWindow *window);
    void unredirect(EffectWindow *window);
 
    virtual void apply(EffectWindow *window, int mask, WindowPaintData &data, WindowQuadList &quads);
 
    void setShader(EffectWindow *window, GLShader *shader);
 
    void setVertexSnappingMode(RenderGeometry::VertexSnappingMode mode);
 
private Q_SLOTS:
    void handleWindowDamaged(EffectWindow *window);
    void handleWindowDeleted(EffectWindow *window);
 
private:
    void setupConnections();
    void destroyConnections();
 
    std::unique_ptr<OffscreenEffectPrivate> d;
};
 
class KWIN_EXPORT CrossFadeEffect : public Effect
{
    Q_OBJECT
public:
    explicit CrossFadeEffect(QObject *parent = nullptr);
    ~CrossFadeEffect() override;
 
    void drawWindow(const RenderTarget &renderTarget, const RenderViewport &viewport, EffectWindow *window, int mask, const QRegion &region, WindowPaintData &data) override;
 
    void redirect(EffectWindow *window);
    void unredirect(EffectWindow *window);
 
    void setShader(EffectWindow *window, GLShader *shader);
 
    static bool supported();
 
private:
    void handleWindowDeleted(EffectWindow *window);
    std::unique_ptr<CrossFadeEffectPrivate> d;
};
 
} // namespace KWin