QtSurface.java

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// Copyright (C) 2014 BogDan Vatra <bogdan@kde.org>
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
package org.qtproject.qt.android;
 
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.PixelFormat;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
 
@SuppressLint("ViewConstructor")
class QtSurface extends SurfaceView implements SurfaceHolder.Callback
{
    private final QtSurfaceInterface m_surfaceCallback;
 
    QtSurface(Context context, QtSurfaceInterface surfaceCallback, boolean onTop, int imageDepth)
    {
        super(context);
        setFocusable(false);
        setFocusableInTouchMode(false);
        setZOrderMediaOverlay(onTop);
        m_surfaceCallback = surfaceCallback;
        SurfaceHolder holder = getHolder();
        holder.setFormat(imageDepth == 16 ? PixelFormat.RGB_565 : PixelFormat.RGBA_8888);
        holder.addCallback(this);
    }
 
    @Override
    public void surfaceCreated(SurfaceHolder holder)
    {
        if (m_surfaceCallback != null)
            m_surfaceCallback.onSurfaceChanged(holder.getSurface());
    }
 
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
    {
        // FIXME: this can sometimes cause flicker on orientation change
        if (m_surfaceCallback != null)
            m_surfaceCallback.onSurfaceChanged(holder.getSurface());
    }
 
    @Override
    public void surfaceDestroyed(SurfaceHolder holder)
    {
        // Once we return from this function, the Surface will be destroyed,
        // so everything holding a reference to it needs to clean it up before we do that
        if (m_surfaceCallback != null)
            m_surfaceCallback.onSurfaceChanged(null);
    }
}