mirror of
https://github.com/mozilla/gecko-dev.git
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646 lines
24 KiB
Java
646 lines
24 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.gfx;
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import org.mozilla.gecko.GeckoAppShell;
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import org.mozilla.gecko.R;
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import org.mozilla.gecko.Tab;
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import org.mozilla.gecko.Tabs;
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import org.mozilla.gecko.gfx.Layer.RenderContext;
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import org.mozilla.gecko.gfx.RenderTask;
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import org.mozilla.gecko.mozglue.DirectBufferAllocator;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Matrix;
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import android.graphics.PointF;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.opengl.GLES20;
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import android.os.SystemClock;
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import android.util.Log;
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import org.mozilla.gecko.mozglue.JNITarget;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.FloatBuffer;
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import java.nio.IntBuffer;
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import java.util.concurrent.CopyOnWriteArrayList;
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import javax.microedition.khronos.egl.EGLConfig;
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/**
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* The layer renderer implements the rendering logic for a layer view.
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*/
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public class LayerRenderer implements Tabs.OnTabsChangedListener {
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private static final String LOGTAG = "GeckoLayerRenderer";
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private static final String PROFTAG = "GeckoLayerRendererProf";
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/*
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* The amount of time a frame is allowed to take to render before we declare it a dropped
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* frame.
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*/
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private static final int MAX_FRAME_TIME = 16; /* 1000 ms / 60 FPS */
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private static final int FRAME_RATE_METER_WIDTH = 128;
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private static final int FRAME_RATE_METER_HEIGHT = 32;
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private static final long NANOS_PER_MS = 1000000;
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private static final int NANOS_PER_SECOND = 1000000000;
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private final LayerView mView;
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private final ScrollbarLayer mHorizScrollLayer;
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private final ScrollbarLayer mVertScrollLayer;
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private final FadeRunnable mFadeRunnable;
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private ByteBuffer mCoordByteBuffer;
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private FloatBuffer mCoordBuffer;
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private RenderContext mLastPageContext;
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private int mMaxTextureSize;
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private int mBackgroundColor;
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private int mOverscrollColor;
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private long mLastFrameTime;
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private final CopyOnWriteArrayList<RenderTask> mTasks;
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private final CopyOnWriteArrayList<Layer> mExtraLayers = new CopyOnWriteArrayList<Layer>();
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// Dropped frames display
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private final int[] mFrameTimings;
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private int mCurrentFrame, mFrameTimingsSum, mDroppedFrames;
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// Render profiling output
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private int mFramesRendered;
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private float mCompleteFramesRendered;
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private boolean mProfileRender;
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private long mProfileOutputTime;
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private IntBuffer mPixelBuffer;
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// Used by GLES 2.0
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private int mProgram;
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private int mPositionHandle;
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private int mTextureHandle;
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private int mSampleHandle;
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private int mTMatrixHandle;
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// column-major matrix applied to each vertex to shift the viewport from
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// one ranging from (-1, -1),(1,1) to (0,0),(1,1) and to scale all sizes by
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// a factor of 2 to fill up the screen
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public static final float[] DEFAULT_TEXTURE_MATRIX = {
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2.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 2.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 2.0f, 0.0f,
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-1.0f, -1.0f, 0.0f, 1.0f
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};
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private static final int COORD_BUFFER_SIZE = 20;
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// The shaders run on the GPU directly, the vertex shader is only applying the
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// matrix transform detailed above
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// Note we flip the y-coordinate in the vertex shader from a
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// coordinate system with (0,0) in the top left to one with (0,0) in
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// the bottom left.
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public static final String DEFAULT_VERTEX_SHADER =
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"uniform mat4 uTMatrix;\n" +
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"attribute vec4 vPosition;\n" +
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"attribute vec2 aTexCoord;\n" +
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"varying vec2 vTexCoord;\n" +
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"void main() {\n" +
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" gl_Position = uTMatrix * vPosition;\n" +
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" vTexCoord.x = aTexCoord.x;\n" +
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" vTexCoord.y = 1.0 - aTexCoord.y;\n" +
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"}\n";
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// We use highp because the screenshot textures
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// we use are large and we stretch them alot
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// so we need all the precision we can get.
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// Unfortunately, highp is not required by ES 2.0
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// so on GPU's like Mali we end up getting mediump
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public static final String DEFAULT_FRAGMENT_SHADER =
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"precision highp float;\n" +
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"varying vec2 vTexCoord;\n" +
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"uniform sampler2D sTexture;\n" +
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"void main() {\n" +
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" gl_FragColor = texture2D(sTexture, vTexCoord);\n" +
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"}\n";
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public LayerRenderer(LayerView view) {
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mView = view;
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setOverscrollColor(R.color.background_normal);
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Bitmap scrollbarImage = view.getScrollbarImage();
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IntSize size = new IntSize(scrollbarImage.getWidth(), scrollbarImage.getHeight());
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scrollbarImage = expandCanvasToPowerOfTwo(scrollbarImage, size);
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mTasks = new CopyOnWriteArrayList<RenderTask>();
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mLastFrameTime = System.nanoTime();
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mVertScrollLayer = new ScrollbarLayer(this, scrollbarImage, size, true);
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mHorizScrollLayer = new ScrollbarLayer(this, diagonalFlip(scrollbarImage), new IntSize(size.height, size.width), false);
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mFadeRunnable = new FadeRunnable();
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mFrameTimings = new int[60];
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mCurrentFrame = mFrameTimingsSum = mDroppedFrames = 0;
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// Initialize the FloatBuffer that will be used to store all vertices and texture
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// coordinates in draw() commands.
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mCoordByteBuffer = DirectBufferAllocator.allocate(COORD_BUFFER_SIZE * 4);
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mCoordByteBuffer.order(ByteOrder.nativeOrder());
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mCoordBuffer = mCoordByteBuffer.asFloatBuffer();
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Tabs.registerOnTabsChangedListener(this);
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}
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private Bitmap expandCanvasToPowerOfTwo(Bitmap image, IntSize size) {
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IntSize potSize = size.nextPowerOfTwo();
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if (size.equals(potSize)) {
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return image;
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}
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// make the bitmap size a power-of-two in both dimensions if it's not already.
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Bitmap potImage = Bitmap.createBitmap(potSize.width, potSize.height, image.getConfig());
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new Canvas(potImage).drawBitmap(image, new Matrix(), null);
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return potImage;
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}
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private Bitmap diagonalFlip(Bitmap image) {
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Matrix rotation = new Matrix();
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rotation.setValues(new float[] { 0, 1, 0, 1, 0, 0, 0, 0, 1 }); // transform (x,y) into (y,x)
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Bitmap rotated = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), rotation, true);
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return rotated;
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}
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public void destroy() {
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DirectBufferAllocator.free(mCoordByteBuffer);
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mCoordByteBuffer = null;
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mCoordBuffer = null;
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mHorizScrollLayer.destroy();
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mVertScrollLayer.destroy();
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Tabs.unregisterOnTabsChangedListener(this);
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}
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void onSurfaceCreated(EGLConfig config) {
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checkMonitoringEnabled();
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createDefaultProgram();
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activateDefaultProgram();
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}
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void setOverscrollColor(int colorId) {
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try {
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mOverscrollColor = mView.getContext().getResources().getColor(colorId);
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} catch (Resources.NotFoundException nfe) { mOverscrollColor = Color.BLACK; }
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}
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public void createDefaultProgram() {
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int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, DEFAULT_VERTEX_SHADER);
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int fragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, DEFAULT_FRAGMENT_SHADER);
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mProgram = GLES20.glCreateProgram();
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GLES20.glAttachShader(mProgram, vertexShader); // add the vertex shader to program
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GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
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GLES20.glLinkProgram(mProgram); // creates OpenGL program executables
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// Get handles to the vertex shader's vPosition, aTexCoord, sTexture, and uTMatrix members.
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mPositionHandle = GLES20.glGetAttribLocation(mProgram, "vPosition");
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mTextureHandle = GLES20.glGetAttribLocation(mProgram, "aTexCoord");
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mSampleHandle = GLES20.glGetUniformLocation(mProgram, "sTexture");
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mTMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uTMatrix");
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int maxTextureSizeResult[] = new int[1];
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GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxTextureSizeResult, 0);
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mMaxTextureSize = maxTextureSizeResult[0];
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}
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// Activates the shader program.
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public void activateDefaultProgram() {
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// Add the program to the OpenGL environment
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GLES20.glUseProgram(mProgram);
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// Set the transformation matrix
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GLES20.glUniformMatrix4fv(mTMatrixHandle, 1, false, DEFAULT_TEXTURE_MATRIX, 0);
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// Enable the arrays from which we get the vertex and texture coordinates
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GLES20.glEnableVertexAttribArray(mPositionHandle);
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GLES20.glEnableVertexAttribArray(mTextureHandle);
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GLES20.glUniform1i(mSampleHandle, 0);
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// TODO: Move these calls into a separate deactivate() call that is called after the
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// underlay and overlay are rendered.
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}
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// Deactivates the shader program. This must be done to avoid crashes after returning to the
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// Gecko C++ compositor from Java.
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public void deactivateDefaultProgram() {
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GLES20.glDisableVertexAttribArray(mTextureHandle);
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GLES20.glDisableVertexAttribArray(mPositionHandle);
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GLES20.glUseProgram(0);
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}
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void restoreState(boolean enableScissor, int scissorX, int scissorY, int scissorW, int scissorH) {
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GLES20.glScissor(scissorX, scissorY, scissorW, scissorH);
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if (enableScissor) {
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GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
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} else {
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GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
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}
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}
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public int getMaxTextureSize() {
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return mMaxTextureSize;
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}
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public void postRenderTask(RenderTask aTask) {
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mTasks.add(aTask);
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mView.requestRender();
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}
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public void removeRenderTask(RenderTask aTask) {
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mTasks.remove(aTask);
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}
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private void runRenderTasks(CopyOnWriteArrayList<RenderTask> tasks, boolean after, long frameStartTime) {
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for (RenderTask task : tasks) {
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if (task.runAfter != after) {
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continue;
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}
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boolean stillRunning = task.run(frameStartTime - mLastFrameTime, frameStartTime);
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// Remove the task from the list if its finished
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if (!stillRunning) {
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tasks.remove(task);
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}
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}
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}
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public void addLayer(Layer layer) {
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synchronized (mExtraLayers) {
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if (mExtraLayers.contains(layer)) {
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mExtraLayers.remove(layer);
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}
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mExtraLayers.add(layer);
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}
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}
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public void removeLayer(Layer layer) {
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synchronized (mExtraLayers) {
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mExtraLayers.remove(layer);
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}
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}
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private void printCheckerboardStats() {
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Log.d(PROFTAG, "Frames rendered over last 1000ms: " + mCompleteFramesRendered + "/" + mFramesRendered);
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mFramesRendered = 0;
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mCompleteFramesRendered = 0;
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}
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/** Used by robocop for testing purposes. Not for production use! */
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IntBuffer getPixels() {
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IntBuffer pixelBuffer = IntBuffer.allocate(mView.getWidth() * mView.getHeight());
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synchronized (pixelBuffer) {
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mPixelBuffer = pixelBuffer;
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mView.requestRender();
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try {
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pixelBuffer.wait();
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} catch (InterruptedException ie) {
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}
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mPixelBuffer = null;
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}
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return pixelBuffer;
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}
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private RenderContext createScreenContext(ImmutableViewportMetrics metrics, PointF offset) {
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RectF viewport = new RectF(0.0f, 0.0f, metrics.getWidth(), metrics.getHeight());
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RectF pageRect = metrics.getPageRect();
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return createContext(viewport, pageRect, 1.0f, offset);
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}
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private RenderContext createPageContext(ImmutableViewportMetrics metrics, PointF offset) {
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RectF viewport = metrics.getViewport();
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RectF pageRect = metrics.getPageRect();
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float zoomFactor = metrics.zoomFactor;
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return createContext(new RectF(RectUtils.round(viewport)), pageRect, zoomFactor, offset);
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}
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private RenderContext createContext(RectF viewport, RectF pageRect, float zoomFactor, PointF offset) {
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if (mCoordBuffer == null) {
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throw new IllegalStateException();
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}
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return new RenderContext(viewport, pageRect, zoomFactor, offset, mPositionHandle, mTextureHandle,
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mCoordBuffer);
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}
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private void updateDroppedFrames(long frameStartTime) {
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int frameElapsedTime = (int)((System.nanoTime() - frameStartTime) / NANOS_PER_MS);
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/* Update the running statistics. */
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mFrameTimingsSum -= mFrameTimings[mCurrentFrame];
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mFrameTimingsSum += frameElapsedTime;
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mDroppedFrames -= (mFrameTimings[mCurrentFrame] + 1) / MAX_FRAME_TIME;
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mDroppedFrames += (frameElapsedTime + 1) / MAX_FRAME_TIME;
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mFrameTimings[mCurrentFrame] = frameElapsedTime;
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mCurrentFrame = (mCurrentFrame + 1) % mFrameTimings.length;
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int averageTime = mFrameTimingsSum / mFrameTimings.length;
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}
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void checkMonitoringEnabled() {
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mProfileRender = Log.isLoggable(PROFTAG, Log.DEBUG);
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}
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/*
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* create a vertex shader type (GLES20.GL_VERTEX_SHADER)
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* or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
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*/
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public static int loadShader(int type, String shaderCode) {
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int shader = GLES20.glCreateShader(type);
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GLES20.glShaderSource(shader, shaderCode);
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GLES20.glCompileShader(shader);
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return shader;
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}
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public Frame createFrame(ImmutableViewportMetrics metrics) {
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return new Frame(metrics);
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}
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class FadeRunnable implements Runnable {
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private boolean mStarted;
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private long mRunAt;
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void scheduleStartFade(long delay) {
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mRunAt = SystemClock.elapsedRealtime() + delay;
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if (!mStarted) {
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mView.postDelayed(this, delay);
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mStarted = true;
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}
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}
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void scheduleNextFadeFrame() {
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if (mStarted) {
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Log.e(LOGTAG, "scheduleNextFadeFrame() called while scheduled for starting fade");
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}
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mView.postDelayed(this, 1000L / 60L); // request another frame at 60fps
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}
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boolean timeToFade() {
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return !mStarted;
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}
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@Override
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public void run() {
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long timeDelta = mRunAt - SystemClock.elapsedRealtime();
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if (timeDelta > 0) {
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// the run-at time was pushed back, so reschedule
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mView.postDelayed(this, timeDelta);
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} else {
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// reached the run-at time, execute
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mStarted = false;
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mView.requestRender();
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}
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}
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}
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public class Frame {
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// The timestamp recording the start of this frame.
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private long mFrameStartTime;
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// A fixed snapshot of the viewport metrics that this frame is using to render content.
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private final ImmutableViewportMetrics mFrameMetrics;
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// A rendering context for page-positioned layers, and one for screen-positioned layers.
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private final RenderContext mPageContext, mScreenContext;
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// Whether a layer was updated.
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private boolean mUpdated;
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private final Rect mPageRect;
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private final Rect mAbsolutePageRect;
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private final PointF mRenderOffset;
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public Frame(ImmutableViewportMetrics metrics) {
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mFrameMetrics = metrics;
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// Work out the offset due to margins
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Layer rootLayer = mView.getLayerClient().getRoot();
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mRenderOffset = mFrameMetrics.getMarginOffset();
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mPageContext = createPageContext(metrics, mRenderOffset);
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mScreenContext = createScreenContext(metrics, mRenderOffset);
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RectF pageRect = mFrameMetrics.getPageRect();
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mAbsolutePageRect = RectUtils.round(pageRect);
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PointF origin = mFrameMetrics.getOrigin();
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pageRect.offset(-origin.x, -origin.y);
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mPageRect = RectUtils.round(pageRect);
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}
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private void setScissorRect() {
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Rect scissorRect = transformToScissorRect(mPageRect);
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GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
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GLES20.glScissor(scissorRect.left, scissorRect.top,
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scissorRect.width(), scissorRect.height());
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}
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private Rect transformToScissorRect(Rect rect) {
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IntSize screenSize = new IntSize(mFrameMetrics.getSize());
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int left = Math.max(0, rect.left);
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int top = Math.max(0, rect.top);
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int right = Math.min(screenSize.width, rect.right);
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int bottom = Math.min(screenSize.height, rect.bottom);
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Rect scissorRect = new Rect(left, screenSize.height - bottom, right,
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(screenSize.height - bottom) + (bottom - top));
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scissorRect.offset(Math.round(-mRenderOffset.x), Math.round(-mRenderOffset.y));
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return scissorRect;
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}
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/** This function is invoked via JNI; be careful when modifying signature. */
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@JNITarget
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public void beginDrawing() {
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mFrameStartTime = System.nanoTime();
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TextureReaper.get().reap();
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TextureGenerator.get().fill();
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mUpdated = true;
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Layer rootLayer = mView.getLayerClient().getRoot();
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// Run through pre-render tasks
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runRenderTasks(mTasks, false, mFrameStartTime);
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boolean hideScrollbars = (mView.getFullScreenState() == FullScreenState.NON_ROOT_ELEMENT);
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if (!mPageContext.fuzzyEquals(mLastPageContext) && !hideScrollbars) {
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// The viewport or page changed, so show the scrollbars again
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// as per UX decision. Don't do this if we're disabling scrolling due to
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// full-screen mode though.
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mVertScrollLayer.unfade();
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mHorizScrollLayer.unfade();
|
|
mFadeRunnable.scheduleStartFade(ScrollbarLayer.FADE_DELAY);
|
|
} else if (mFadeRunnable.timeToFade()) {
|
|
boolean stillFading = mVertScrollLayer.fade() | mHorizScrollLayer.fade();
|
|
if (stillFading) {
|
|
mFadeRunnable.scheduleNextFadeFrame();
|
|
}
|
|
}
|
|
mLastPageContext = mPageContext;
|
|
|
|
/* Update layers. */
|
|
if (rootLayer != null) {
|
|
// Called on compositor thread.
|
|
mUpdated &= rootLayer.update(mPageContext);
|
|
}
|
|
|
|
mUpdated &= mVertScrollLayer.update(mPageContext); // called on compositor thread
|
|
mUpdated &= mHorizScrollLayer.update(mPageContext); // called on compositor thread
|
|
|
|
for (Layer layer : mExtraLayers) {
|
|
mUpdated &= layer.update(mPageContext); // called on compositor thread
|
|
}
|
|
}
|
|
|
|
private void clear(int color) {
|
|
GLES20.glClearColor(((color >> 16) & 0xFF) / 255.0f,
|
|
((color >> 8) & 0xFF) / 255.0f,
|
|
(color & 0xFF) / 255.0f,
|
|
0.0f);
|
|
// The bits set here need to match up with those used
|
|
// in gfx/layers/opengl/LayerManagerOGL.cpp.
|
|
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT |
|
|
GLES20.GL_DEPTH_BUFFER_BIT);
|
|
}
|
|
|
|
/** This function is invoked via JNI; be careful when modifying signature. */
|
|
@JNITarget
|
|
public void drawBackground() {
|
|
// Any GL state which is changed here must be restored in
|
|
// restoreState(...)
|
|
|
|
GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
|
|
|
|
// Draw the overscroll background area as a solid color
|
|
clear(mOverscrollColor);
|
|
|
|
// Update background color.
|
|
mBackgroundColor = mView.getBackgroundColor();
|
|
|
|
// Clear the page area to the page background colour.
|
|
setScissorRect();
|
|
clear(mBackgroundColor);
|
|
GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
|
|
}
|
|
|
|
@JNITarget
|
|
public void drawForeground() {
|
|
// Any GL state which is changed here must be restored in
|
|
// restoreState(...)
|
|
|
|
/* Draw any extra layers that were added (likely plugins) */
|
|
if (mExtraLayers.size() > 0) {
|
|
for (Layer layer : mExtraLayers) {
|
|
layer.draw(mPageContext);
|
|
}
|
|
}
|
|
|
|
/* Draw the vertical scrollbar. */
|
|
if (mPageRect.height() > mFrameMetrics.getHeight())
|
|
mVertScrollLayer.draw(mPageContext);
|
|
|
|
/* Draw the horizontal scrollbar. */
|
|
if (mPageRect.width() > mFrameMetrics.getWidth())
|
|
mHorizScrollLayer.draw(mPageContext);
|
|
|
|
/* Measure how much of the screen is checkerboarding */
|
|
Layer rootLayer = mView.getLayerClient().getRoot();
|
|
if ((rootLayer != null) &&
|
|
(mProfileRender || PanningPerfAPI.isRecordingCheckerboard())) {
|
|
// Calculate the incompletely rendered area of the page
|
|
float checkerboard = 1.0f - GeckoAppShell.computeRenderIntegrity();
|
|
|
|
PanningPerfAPI.recordCheckerboard(checkerboard);
|
|
if (checkerboard < 0.0f || checkerboard > 1.0f) {
|
|
Log.e(LOGTAG, "Checkerboard value out of bounds: " + checkerboard);
|
|
}
|
|
|
|
mCompleteFramesRendered += 1.0f - checkerboard;
|
|
mFramesRendered ++;
|
|
|
|
if (mFrameStartTime - mProfileOutputTime > NANOS_PER_SECOND) {
|
|
mProfileOutputTime = mFrameStartTime;
|
|
printCheckerboardStats();
|
|
}
|
|
}
|
|
|
|
runRenderTasks(mTasks, true, mFrameStartTime);
|
|
|
|
}
|
|
|
|
/** This function is invoked via JNI; be careful when modifying signature. */
|
|
@JNITarget
|
|
public void endDrawing() {
|
|
// If a layer update requires further work, schedule another redraw
|
|
if (!mUpdated)
|
|
mView.requestRender();
|
|
|
|
PanningPerfAPI.recordFrameTime();
|
|
|
|
/* Used by robocop for testing purposes */
|
|
IntBuffer pixelBuffer = mPixelBuffer;
|
|
if (mUpdated && pixelBuffer != null) {
|
|
synchronized (pixelBuffer) {
|
|
pixelBuffer.position(0);
|
|
GLES20.glReadPixels(0, 0, (int)mScreenContext.viewport.width(),
|
|
(int)mScreenContext.viewport.height(), GLES20.GL_RGBA,
|
|
GLES20.GL_UNSIGNED_BYTE, pixelBuffer);
|
|
pixelBuffer.notify();
|
|
}
|
|
}
|
|
|
|
// Remove background color once we've painted. GeckoLayerClient is
|
|
// responsible for setting this flag before current document is
|
|
// composited.
|
|
if (mView.getPaintState() == LayerView.PAINT_BEFORE_FIRST) {
|
|
mView.post(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
mView.getChildAt(0).setBackgroundColor(Color.TRANSPARENT);
|
|
}
|
|
});
|
|
mView.setPaintState(LayerView.PAINT_AFTER_FIRST);
|
|
}
|
|
mLastFrameTime = mFrameStartTime;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onTabChanged(final Tab tab, Tabs.TabEvents msg, Object data) {
|
|
// Sets the background of the newly selected tab. This background color
|
|
// gets cleared in endDrawing(). This function runs on the UI thread,
|
|
// but other code that touches the paint state is run on the compositor
|
|
// thread, so this may need to be changed if any problems appear.
|
|
if (msg == Tabs.TabEvents.SELECTED) {
|
|
if (mView != null) {
|
|
final int overscrollColor =
|
|
(tab.isPrivate() ? R.color.background_private : R.color.background_normal);
|
|
setOverscrollColor(overscrollColor);
|
|
|
|
if (mView.getChildAt(0) != null) {
|
|
mView.getChildAt(0).setBackgroundColor(tab.getBackgroundColor());
|
|
}
|
|
mView.setPaintState(LayerView.PAINT_START);
|
|
}
|
|
}
|
|
}
|
|
}
|