127 lines
3.7 KiB
Java
127 lines
3.7 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.nyan;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.view.SurfaceHolder;
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public final class NyanSurfaceHelper implements SurfaceHolder.Callback {
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private SurfaceHolder mHolder;
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private DrawingThread mThread;
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private final NyanDrawingHelper mNyanDrawingHelper;
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public NyanSurfaceHelper(final Context context) {
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mNyanDrawingHelper = new NyanDrawingHelper(context);
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}
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public SurfaceHolder getHolder() {
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return mHolder;
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}
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public void setScale(final float scale) {
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mNyanDrawingHelper.setScale(scale);
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}
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public void setSkipDrawing(final boolean skipDrawing) {
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if (mThread != null) {
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mThread.setSkipDrawing(skipDrawing);
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}
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}
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public void start() {
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if (mThread != null) return;
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mThread = new DrawingThread(this, mNyanDrawingHelper);
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mThread.start();
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}
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public void stop() {
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if (mThread != null) {
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mThread.cancel();
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}
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mThread = null;
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}
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@Override
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public void surfaceChanged(final SurfaceHolder holder, final int format, final int width, final int height) {
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mNyanDrawingHelper.dispatchSizeChanged(width, height);
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}
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@Override
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public void surfaceCreated(final SurfaceHolder holder) {
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mHolder = holder;
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start();
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}
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@Override
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public void surfaceDestroyed(final SurfaceHolder holder) {
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stop();
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mHolder = null;
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}
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private static class DrawingThread extends Thread {
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private final NyanSurfaceHelper mSurfaceHelper;
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private final NyanDrawingHelper mDrawingHelper;
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private boolean mCancelled;
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private boolean mSkipDrawing;
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DrawingThread(final NyanSurfaceHelper surfaceHelper, final NyanDrawingHelper drawingHelper) {
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mSurfaceHelper = surfaceHelper;
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mDrawingHelper = drawingHelper;
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}
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public void cancel() {
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mCancelled = true;
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}
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@Override
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public void run() {
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while (!mCancelled) {
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final long startTime = System.currentTimeMillis();
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drawFrame();
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final long endTime = System.currentTimeMillis();
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try {
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Thread.sleep(Math.max(0, 66 - (endTime - startTime)));
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} catch (final InterruptedException ignored) {
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}
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}
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}
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public void setSkipDrawing(final boolean skipDrawing) {
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mSkipDrawing = skipDrawing;
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}
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private void drawFrame() {
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final SurfaceHolder holder = mSurfaceHelper.getHolder();
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if (mSkipDrawing || holder == null || holder.isCreating()) return;
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final Canvas c = holder.lockCanvas();
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if (c == null) return;
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if (mDrawingHelper != null) {
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mDrawingHelper.dispatchDraw(c);
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}
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holder.unlockCanvasAndPost(c);
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}
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}
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}
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