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package org.distorted.examples.plainmonalisa;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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import java.lang.ref.WeakReference;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Handler for RenderThread. Used for messages sent from the UI thread to the render thread.
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* <p>
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* The object is created on the render thread, and the various "send" methods are called
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* from the UI thread.
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*/
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public class RenderHandler extends Handler
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{
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private static final String TAG = "RenderHandler";
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private static final int MSG_SURFACE_CREATED = 0;
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private static final int MSG_SURFACE_CHANGED = 1;
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private static final int MSG_DO_FRAME = 2;
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private static final int MSG_SHUTDOWN = 4;
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// This shouldn't need to be a weak ref, since we'll go away when the Looper quits,
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// but no real harm in it.
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private WeakReference<RenderThread> mWeakRenderThread;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Call from render thread.
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*/
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public RenderHandler(RenderThread rt)
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{
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mWeakRenderThread = new WeakReference<>(rt);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Sends the "surface created" message.
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* <p>
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* Call from UI thread.
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*/
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public void sendSurfaceCreated()
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{
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sendMessage(obtainMessage(RenderHandler.MSG_SURFACE_CREATED));
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Sends the "surface changed" message, forwarding what we got from the SurfaceHolder.
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* <p>
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* Call from UI thread.
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*/
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public void sendSurfaceChanged(@SuppressWarnings("unused") int format, int width, int height)
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{
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sendMessage(obtainMessage(RenderHandler.MSG_SURFACE_CHANGED, width, height));
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Sends the "do frame" message, forwarding the Choreographer event.
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* <p>
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* Call from UI thread.
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*/
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public void sendDoFrame(long frameTimeNanos)
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{
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sendMessage(obtainMessage(RenderHandler.MSG_DO_FRAME, (int) (frameTimeNanos >> 32), (int) frameTimeNanos));
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Sends the "shutdown" message, which tells the render thread to halt.
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* <p>
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* Call from UI thread.
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*/
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public void sendShutdown()
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{
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sendMessage(obtainMessage(RenderHandler.MSG_SHUTDOWN));
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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@Override // runs on RenderThread
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public void handleMessage(Message msg)
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{
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int what = msg.what;
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//Log.d(TAG, "RenderHandler [" + this + "]: what=" + what);
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RenderThread renderThread = mWeakRenderThread.get();
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if (renderThread == null)
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{
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Log.w(TAG, "RenderHandler.handleMessage: weak ref is null");
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return;
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}
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switch (what)
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{
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case MSG_SURFACE_CREATED: renderThread.surfaceCreated();
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break;
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case MSG_SURFACE_CHANGED: renderThread.surfaceChanged(msg.arg1, msg.arg2);
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break;
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case MSG_DO_FRAME: long timestamp = (((long) msg.arg1) << 32) | (((long) msg.arg2) & 0xffffffffL);
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renderThread.doFrame(timestamp);
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break;
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case MSG_SHUTDOWN: renderThread.shutdown();
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break;
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default: throw new RuntimeException("unknown message " + what);
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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