windowthumbnailitem.h

Go to the documentation of this file.

/*
    SPDX-FileCopyrightText: 2011 Martin Gräßlin <mgraesslin@kde.org>
    SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include <QQuickItem>
#include <QUuid>
 
#include <epoxy/gl.h>
 
namespace KWin
{
class Window;
class GLFramebuffer;
class GLTexture;
class ThumbnailTextureProvider;
class WindowThumbnailSource;
 
class WindowThumbnailSource : public QObject
{
    Q_OBJECT
 
public:
    WindowThumbnailSource(QQuickWindow *view, Window *handle);
    ~WindowThumbnailSource() override;
 
    static std::shared_ptr<WindowThumbnailSource> getOrCreate(QQuickWindow *window, Window *handle);
 
    struct Frame
    {
        std::shared_ptr<GLTexture> texture;
        GLsync fence;
    };
    struct Frame {…};
 
    Frame acquire();
 
Q_SIGNALS:
    void changed();
 
private:
    void update();
 
    QPointer<QQuickWindow> m_view;
    QPointer<Window> m_handle;
 
    std::shared_ptr<GLTexture> m_offscreenTexture;
    std::unique_ptr<GLFramebuffer> m_offscreenTarget;
    GLsync m_acquireFence = 0;
    bool m_dirty = true;
};
class WindowThumbnailSource : public QObject {…};
 
class WindowThumbnailItem : public QQuickItem
{
    Q_OBJECT
    Q_PROPERTY(QUuid wId READ wId WRITE setWId NOTIFY wIdChanged)
    Q_PROPERTY(KWin::Window *client READ client WRITE setClient NOTIFY clientChanged)
 
public:
    explicit WindowThumbnailItem(QQuickItem *parent = nullptr);
    ~WindowThumbnailItem() override;
 
    QUuid wId() const;
    void setWId(const QUuid &wId);
 
    Window *client() const;
    void setClient(Window *client);
 
    QSGTextureProvider *textureProvider() const override;
    bool isTextureProvider() const override;
    QSGNode *updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *) override;
 
protected:
    void releaseResources() override;
    void itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &value) override;
 
Q_SIGNALS:
    void wIdChanged();
    void clientChanged();
 
private:
    QImage fallbackImage() const;
    QRectF paintedRect() const;
    void updateImplicitSize();
    void updateSource();
    void resetSource();
 
    QUuid m_wId;
    QPointer<Window> m_client;
 
    mutable ThumbnailTextureProvider *m_provider = nullptr;
    std::shared_ptr<WindowThumbnailSource> m_source;
};
 
} // namespace KWin