qwasmbackingstore.h

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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#ifndef QWASMBACKINGSTORE_H
#define QWASMBACKINGSTORE_H
 
#include <qpa/qplatformbackingstore.h>
#include <QtGui/qimage.h>
 
#include <emscripten/val.h>
 
QT_BEGIN_NAMESPACE
 
class QOpenGLTexture;
class QRegion;
class QWasmCompositor;
class QWasmWindow;
 
class QWasmBackingStore : public QPlatformBackingStore
{
public:
    QWasmBackingStore(QWasmCompositor *compositor, QWindow *window);
    ~QWasmBackingStore();
 
    QPaintDevice *paintDevice() override;
 
    void beginPaint(const QRegion &) override;
    void flush(QWindow *window, const QRegion &region, const QPoint &offset) override;
    void resize(const QSize &size, const QRegion &staticContents) override;
    QImage toImage() const override;
    const QImage &getImageRef() const;
 
    emscripten::val getUpdatedWebImage(QWasmWindow *window);
 
protected:
    void updateTexture(QWasmWindow *window);
 
private:
    QWasmCompositor *m_compositor;
    QImage m_image;
    QRegion m_dirty;
    emscripten::val m_webImageDataArray = emscripten::val::undefined();
};
 
QT_END_NAMESPACE
 
#endif // QWASMBACKINGSTORE_H