[Remoting Android] Remove old renderer code

remoting/android/java/src/org/chromium/chromoting/DesktopView.java

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chromoting;
-
-import android.graphics.Bitmap;
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.Paint;
-import android.graphics.Point;
-import android.os.Looper;
-import android.os.SystemClock;
-import android.view.SurfaceHolder;
-
-import org.chromium.base.Log;
-import org.chromium.chromoting.jni.Client;
-import org.chromium.chromoting.jni.Display;
-
-/**
- * The user interface for viewing and interacting with a specific remote host.
- * It provides a canvas onto which the video feed is rendered, handles
- * multitouch pan and zoom gestures, and collects and forwards input events.
- */
-/** GUI element that holds the drawing canvas. */
-public class DesktopView extends AbstractDesktopView implements SurfaceHolder.Callback {
-    private static final String TAG = "Chromoting";
-
-    private final Display mDisplay;
-
-
-    // Flag to prevent multiple repaint requests from being backed up. Requests for repainting will
-    // be dropped if this is already set to true. This is used by the main thread and the painting
-    // thread, so the access should be synchronized on |mRenderData|.
-    private boolean mRepaintPending;
-
-    // Flag used to ensure that the SurfaceView is only painted between calls to surfaceCreated()
-    // and surfaceDestroyed(). Accessed on main thread and display thread, so this should be
-    // synchronized on |mRenderData|.
-    private boolean mSurfaceCreated = false;
-
-    private final Event.Raisable<PaintEventParameter> mOnPaint = new Event.Raisable<>();
-
-    // Variables to control animation by the TouchInputHandler.
-
-    /** Protects mInputAnimationRunning. */
-    private final Object mAnimationLock = new Object();
-
-    /** Whether the TouchInputHandler has requested animation to be performed. */
-    private boolean mInputAnimationRunning = false;
-
-    public DesktopView(Display display, Desktop desktop, Client client) {
-        super(desktop, client);
-        Preconditions.notNull(display);
-        mDisplay = display;
-
-        mRepaintPending = false;
-
-        getHolder().addCallback(this);
-
-        attachRedrawCallback();
-    }
-
-    public Event<PaintEventParameter> onPaint() {
-        return mOnPaint;
-    }
-
-    /** Request repainting of the desktop view. */
-    void requestRepaint() {
-        synchronized (mRenderData) {
-            if (mRepaintPending) {
-                return;
-            }
-            mRepaintPending = true;
-        }
-        mDisplay.redrawGraphics();
-    }
-
-    /**
-     * Redraws the canvas. This should be done on a non-UI thread or it could
-     * cause the UI to lag. Specifically, it is currently invoked on the native
-     * graphics thread using a JNI.
-     */
-    public void paint() {
-        long startTimeMs = SystemClock.uptimeMillis();
-
-        if (Looper.myLooper() == Looper.getMainLooper()) {
-            Log.w(TAG, "Canvas being redrawn on UI thread");
-        }
-
-        Bitmap image = mDisplay.getVideoFrame();
-        synchronized (mRenderData) {
-            mRepaintPending = false;
-        }
-        if (image == null) {
-            // This can happen if the client is connected, but a complete video frame has not yet
-            // been decoded.
-            return;
-        }
-
-        int width = image.getWidth();
-        int height = image.getHeight();
-        boolean sizeChanged = false;
-        synchronized (mRenderData) {
-            if (mRenderData.imageWidth != width || mRenderData.imageHeight != height) {
-                // TODO(lambroslambrou): Move this code into a sizeChanged() callback, to be
-                // triggered from native code (on the display thread) when the remote screen size
-                // changes.
-                mRenderData.imageWidth = width;
-                mRenderData.imageHeight = height;
-                sizeChanged = true;
-            }
-        }
-        if (sizeChanged) {
-            mOnHostSizeChanged.raise(new SizeChangedEventParameter(width, height));
-        }
-
-        Canvas canvas;
-        Point cursorPosition;
-        boolean drawCursor;
-        synchronized (mRenderData) {
-            // Don't try to lock the canvas before it is ready, as the implementation of
-            // lockCanvas() may throttle these calls to a slow rate in order to avoid consuming CPU.
-            // Note that a successful call to lockCanvas() will prevent the framework from
-            // destroying the Surface until it is unlocked.
-            if (!mSurfaceCreated) {
-                return;
-            }
-            canvas = getHolder().lockCanvas();
-            if (canvas == null) {
-                return;
-            }
-            canvas.setMatrix(mRenderData.transform);
-            drawCursor = mRenderData.drawCursor;
-            cursorPosition = mRenderData.getCursorPosition();
-        }
-
-        canvas.drawColor(Color.BLACK);
-        canvas.drawBitmap(image, 0, 0, new Paint());
-
-        float scaleFactor;
-        synchronized (mRenderData) {
-            scaleFactor = mRenderData.transform.mapRadius(1);
-        }
-        mOnPaint.raise(new PaintEventParameter(cursorPosition, canvas, scaleFactor));
-
-        if (drawCursor) {
-            Bitmap cursorBitmap = mDisplay.getCursorBitmap();
-            if (cursorBitmap != null) {
-                Point hotspot = mDisplay.getCursorHotspot();
-                canvas.drawBitmap(cursorBitmap, cursorPosition.x - hotspot.x,
-                        cursorPosition.y - hotspot.y, new Paint());
-            }
-        }
-
-        getHolder().unlockCanvasAndPost(canvas);
-
-        synchronized (mAnimationLock) {
-            if (mInputAnimationRunning || !mOnPaint.isEmpty()) {
-                getHandler().postAtTime(new Runnable() {
-                    @Override
-                    public void run() {
-                        processAnimation();
-                    }
-                }, startTimeMs + 30);
-            }
-        }
-    }
-
-    private void processAnimation() {
-        boolean running;
-        synchronized (mAnimationLock) {
-            running = mInputAnimationRunning;
-        }
-        if (running) {
-            mInputHandler.processAnimation();
-            requestRepaint();
-        } else if (!mOnPaint.isEmpty()) {
-            requestRepaint();
-        }
-    }
-
-    /**
-     * Called after the canvas is initially created, then after every subsequent resize, as when
-     * the display is rotated.
-     */
-    @Override
-    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
-        synchronized (mRenderData) {
-            mRenderData.screenWidth = width;
-            mRenderData.screenHeight = height;
-        }
-
-        mOnClientSizeChanged.raise(new SizeChangedEventParameter(width, height));
-        requestRepaint();
-    }
-
-    public void attachRedrawCallback() {
-        mDisplay.provideRedrawCallback(new Runnable() {
-            @Override
-            public void run() {
-                paint();
-            }
-        });
-    }
-
-    /** Called when the canvas is first created. */
-    @Override
-    public void surfaceCreated(SurfaceHolder holder) {
-        synchronized (mRenderData) {
-            mSurfaceCreated = true;
-        }
-    }
-
-    /**
-     * Called when the canvas is finally destroyed. Marks the canvas as needing a redraw so that it
-     * will not be blank if the user later switches back to our window.
-     */
-    @Override
-    public void surfaceDestroyed(SurfaceHolder holder) {
-        synchronized (mRenderData) {
-            mSurfaceCreated = false;
-        }
-    }
-
-    @Override
-    public void showInputFeedback(InputFeedbackType feedbackToShow, Point pos) {
-        float radius = getFeedbackRadius(feedbackToShow);
-        if (radius <= 0.0f) {
-            return;
-        }
-        FeedbackAnimator.startAnimation(this, pos, radius);
-        requestRepaint();
-    }
-
-    @Override
-    public void transformationChanged() {
-        requestRepaint();
-    }
-
-    @Override
-    public void cursorMoved() {
-        // For current implementation, cursorMoved() is always followed by transformationChanged()
-        // even if the canvas isn't really changed. For future we should improve this by not calling
-        // transformationChanged() if the cursor is moved but the canvas is not changed.
-    }
-
-    @Override
-    public void cursorVisibilityChanged() {
-        requestRepaint();
-    }
-
-    @Override
-    public void setAnimationEnabled(boolean enabled) {
-        synchronized (mAnimationLock) {
-            if (enabled && !mInputAnimationRunning) {
-                requestRepaint();
-            }
-            mInputAnimationRunning = enabled;
-        }
-    }
-}