| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.internal.policy; |
| |
| import android.graphics.Rect; |
| import android.graphics.drawable.ColorDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.Looper; |
| import android.view.Choreographer; |
| import android.view.DisplayListCanvas; |
| import android.view.RenderNode; |
| import android.view.ThreadedRenderer; |
| import android.view.View; |
| |
| /** |
| * The thread which draws a fill in background while the app is resizing in areas where the app |
| * content draw is lagging behind the resize operation. |
| * It starts with the creation and it ends once someone calls destroy(). |
| * Any size changes can be passed by a call to setTargetRect will passed to the thread and |
| * executed via the Choreographer. |
| * @hide |
| */ |
| public class BackdropFrameRenderer extends Thread implements Choreographer.FrameCallback { |
| |
| private DecorView mDecorView; |
| |
| // This is containing the last requested size by a resize command. Note that this size might |
| // or might not have been applied to the output already. |
| private final Rect mTargetRect = new Rect(); |
| |
| // The render nodes for the multi threaded renderer. |
| private ThreadedRenderer mRenderer; |
| private RenderNode mFrameAndBackdropNode; |
| private RenderNode mSystemBarBackgroundNode; |
| |
| private final Rect mOldTargetRect = new Rect(); |
| private final Rect mNewTargetRect = new Rect(); |
| private Choreographer mChoreographer; |
| |
| // Cached size values from the last render for the case that the view hierarchy is gone |
| // during a configuration change. |
| private int mLastContentWidth; |
| private int mLastContentHeight; |
| private int mLastCaptionHeight; |
| private int mLastXOffset; |
| private int mLastYOffset; |
| |
| // Whether to report when next frame is drawn or not. |
| private boolean mReportNextDraw; |
| |
| private Drawable mCaptionBackgroundDrawable; |
| private Drawable mUserCaptionBackgroundDrawable; |
| private Drawable mResizingBackgroundDrawable; |
| private ColorDrawable mStatusBarColor; |
| |
| public BackdropFrameRenderer(DecorView decorView, ThreadedRenderer renderer, Rect initialBounds, |
| Drawable resizingBackgroundDrawable, Drawable captionBackgroundDrawable, |
| Drawable userCaptionBackgroundDrawable, int statusBarColor) { |
| setName("ResizeFrame"); |
| |
| mRenderer = renderer; |
| onResourcesLoaded(decorView, resizingBackgroundDrawable, captionBackgroundDrawable, |
| userCaptionBackgroundDrawable, statusBarColor); |
| |
| // Create a render node for the content and frame backdrop |
| // which can be resized independently from the content. |
| mFrameAndBackdropNode = RenderNode.create("FrameAndBackdropNode", null); |
| |
| mRenderer.addRenderNode(mFrameAndBackdropNode, true); |
| |
| // Set the initial bounds and draw once so that we do not get a broken frame. |
| mTargetRect.set(initialBounds); |
| synchronized (this) { |
| changeWindowSizeLocked(initialBounds); |
| } |
| |
| // Kick off our draw thread. |
| start(); |
| } |
| |
| void onResourcesLoaded(DecorView decorView, Drawable resizingBackgroundDrawable, |
| Drawable captionBackgroundDrawableDrawable, Drawable userCaptionBackgroundDrawable, |
| int statusBarColor) { |
| mDecorView = decorView; |
| mResizingBackgroundDrawable = resizingBackgroundDrawable; |
| mCaptionBackgroundDrawable = captionBackgroundDrawableDrawable; |
| mUserCaptionBackgroundDrawable = userCaptionBackgroundDrawable; |
| if (mCaptionBackgroundDrawable == null) { |
| mCaptionBackgroundDrawable = mResizingBackgroundDrawable; |
| } |
| if (statusBarColor != 0) { |
| mStatusBarColor = new ColorDrawable(statusBarColor); |
| addSystemBarNodeIfNeeded(); |
| } else { |
| mStatusBarColor = null; |
| } |
| } |
| |
| private void addSystemBarNodeIfNeeded() { |
| if (mSystemBarBackgroundNode != null) { |
| return; |
| } |
| mSystemBarBackgroundNode = RenderNode.create("SystemBarBackgroundNode", null); |
| mRenderer.addRenderNode(mSystemBarBackgroundNode, false); |
| } |
| |
| /** |
| * Call this function asynchronously when the window size has been changed. The change will |
| * be picked up once per frame and the frame will be re-rendered accordingly. |
| * @param newTargetBounds The new target bounds. |
| */ |
| public void setTargetRect(Rect newTargetBounds) { |
| synchronized (this) { |
| mTargetRect.set(newTargetBounds); |
| // Notify of a bounds change. |
| pingRenderLocked(); |
| } |
| } |
| |
| /** |
| * The window got replaced due to a configuration change. |
| */ |
| public void onConfigurationChange() { |
| synchronized (this) { |
| if (mRenderer != null) { |
| // Enforce a window redraw. |
| mOldTargetRect.set(0, 0, 0, 0); |
| pingRenderLocked(); |
| } |
| } |
| } |
| |
| /** |
| * All resources of the renderer will be released. This function can be called from the |
| * the UI thread as well as the renderer thread. |
| */ |
| public void releaseRenderer() { |
| synchronized (this) { |
| if (mRenderer != null) { |
| // Invalidate the current content bounds. |
| mRenderer.setContentDrawBounds(0, 0, 0, 0); |
| |
| // Remove the render node again |
| // (see comment above - better to do that only once). |
| mRenderer.removeRenderNode(mFrameAndBackdropNode); |
| if (mSystemBarBackgroundNode != null) { |
| mRenderer.removeRenderNode(mSystemBarBackgroundNode); |
| } |
| |
| mRenderer = null; |
| |
| // Exit the renderer loop. |
| pingRenderLocked(); |
| } |
| } |
| } |
| |
| @Override |
| public void run() { |
| try { |
| Looper.prepare(); |
| synchronized (this) { |
| mChoreographer = Choreographer.getInstance(); |
| |
| // Draw at least once. |
| mChoreographer.postFrameCallback(this); |
| } |
| Looper.loop(); |
| } finally { |
| releaseRenderer(); |
| } |
| synchronized (this) { |
| // Make sure no more messages are being sent. |
| mChoreographer = null; |
| } |
| } |
| |
| /** |
| * The implementation of the FrameCallback. |
| * @param frameTimeNanos The time in nanoseconds when the frame started being rendered, |
| * in the {@link System#nanoTime()} timebase. Divide this value by {@code 1000000} |
| */ |
| @Override |
| public void doFrame(long frameTimeNanos) { |
| synchronized (this) { |
| if (mRenderer == null) { |
| reportDrawIfNeeded(); |
| // Tell the looper to stop. We are done. |
| Looper.myLooper().quit(); |
| return; |
| } |
| mNewTargetRect.set(mTargetRect); |
| if (!mNewTargetRect.equals(mOldTargetRect) || mReportNextDraw) { |
| mOldTargetRect.set(mNewTargetRect); |
| changeWindowSizeLocked(mNewTargetRect); |
| } |
| } |
| } |
| |
| /** |
| * The content is about to be drawn and we got the location of where it will be shown. |
| * If a "changeWindowSizeLocked" call has already been processed, we will re-issue the call |
| * if the previous call was ignored since the size was unknown. |
| * @param xOffset The x offset where the content is drawn to. |
| * @param yOffset The y offset where the content is drawn to. |
| * @param xSize The width size of the content. This should not be 0. |
| * @param ySize The height of the content. |
| * @return true if a frame should be requested after the content is drawn; false otherwise. |
| */ |
| public boolean onContentDrawn(int xOffset, int yOffset, int xSize, int ySize) { |
| synchronized (this) { |
| final boolean firstCall = mLastContentWidth == 0; |
| // The current content buffer is drawn here. |
| mLastContentWidth = xSize; |
| mLastContentHeight = ySize - mLastCaptionHeight; |
| mLastXOffset = xOffset; |
| mLastYOffset = yOffset; |
| |
| mRenderer.setContentDrawBounds( |
| mLastXOffset, |
| mLastYOffset, |
| mLastXOffset + mLastContentWidth, |
| mLastYOffset + mLastCaptionHeight + mLastContentHeight); |
| // If this was the first call and changeWindowSizeLocked got already called prior |
| // to us, we should re-issue a changeWindowSizeLocked now. |
| return firstCall |
| && (mLastCaptionHeight != 0 || !mDecorView.isShowingCaption()); |
| } |
| } |
| |
| public void onRequestDraw(boolean reportNextDraw) { |
| synchronized (this) { |
| mReportNextDraw = reportNextDraw; |
| mOldTargetRect.set(0, 0, 0, 0); |
| pingRenderLocked(); |
| } |
| } |
| |
| /** |
| * Resizing the frame to fit the new window size. |
| * @param newBounds The window bounds which needs to be drawn. |
| */ |
| private void changeWindowSizeLocked(Rect newBounds) { |
| |
| // While a configuration change is taking place the view hierarchy might become |
| // inaccessible. For that case we remember the previous metrics to avoid flashes. |
| // Note that even when there is no visible caption, the caption child will exist. |
| final int captionHeight = mDecorView.getCaptionHeight(); |
| final int statusBarHeight = mDecorView.getStatusBarHeight(); |
| |
| // The caption height will probably never dynamically change while we are resizing. |
| // Once set to something other then 0 it should be kept that way. |
| if (captionHeight != 0) { |
| // Remember the height of the caption. |
| mLastCaptionHeight = captionHeight; |
| } |
| |
| // Make sure that the other thread has already prepared the render draw calls for the |
| // content. If any size is 0, we have to wait for it to be drawn first. |
| if ((mLastCaptionHeight == 0 && mDecorView.isShowingCaption()) || |
| mLastContentWidth == 0 || mLastContentHeight == 0) { |
| return; |
| } |
| |
| // Since the surface is spanning the entire screen, we have to add the start offset of |
| // the bounds to get to the surface location. |
| final int left = mLastXOffset + newBounds.left; |
| final int top = mLastYOffset + newBounds.top; |
| final int width = newBounds.width(); |
| final int height = newBounds.height(); |
| |
| mFrameAndBackdropNode.setLeftTopRightBottom(left, top, left + width, top + height); |
| |
| // Draw the caption and content backdrops in to our render node. |
| DisplayListCanvas canvas = mFrameAndBackdropNode.start(width, height); |
| final Drawable drawable = mUserCaptionBackgroundDrawable != null |
| ? mUserCaptionBackgroundDrawable : mCaptionBackgroundDrawable; |
| drawable.setBounds(0, 0, left + width, top + mLastCaptionHeight); |
| drawable.draw(canvas); |
| |
| // The backdrop: clear everything with the background. Clipping is done elsewhere. |
| mResizingBackgroundDrawable.setBounds(0, mLastCaptionHeight, left + width, top + height); |
| mResizingBackgroundDrawable.draw(canvas); |
| mFrameAndBackdropNode.end(canvas); |
| |
| if (mSystemBarBackgroundNode != null && mStatusBarColor != null) { |
| canvas = mSystemBarBackgroundNode.start(width, height); |
| mSystemBarBackgroundNode.setLeftTopRightBottom(left, top, left + width, top + height); |
| mStatusBarColor.setBounds(0, 0, left + width, statusBarHeight); |
| mStatusBarColor.draw(canvas); |
| mSystemBarBackgroundNode.end(canvas); |
| mRenderer.drawRenderNode(mSystemBarBackgroundNode); |
| } |
| |
| // We need to render the node explicitly |
| mRenderer.drawRenderNode(mFrameAndBackdropNode); |
| |
| reportDrawIfNeeded(); |
| } |
| |
| /** Notify view root that a frame has been drawn by us, if it has requested so. */ |
| private void reportDrawIfNeeded() { |
| if (mReportNextDraw) { |
| if (mDecorView.isAttachedToWindow()) { |
| mDecorView.getViewRootImpl().reportDrawFinish(); |
| } |
| mReportNextDraw = false; |
| } |
| } |
| |
| /** |
| * Sends a message to the renderer to wake up and perform the next action which can be |
| * either the next rendering or the self destruction if mRenderer is null. |
| * Note: This call must be synchronized. |
| */ |
| private void pingRenderLocked() { |
| if (mChoreographer != null) { |
| mChoreographer.postFrameCallback(this); |
| } |
| } |
| |
| void setUserCaptionBackgroundDrawable(Drawable userCaptionBackgroundDrawable) { |
| mUserCaptionBackgroundDrawable = userCaptionBackgroundDrawable; |
| } |
| } |