mirror of
https://github.com/mozilla/gecko-dev.git
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04cca6da2d
Fix flickering that can occur when the surface size changes due to a layout change (such as the virtual keyboard appearing/disappearing) on Android.
167 lines
5.4 KiB
Java
167 lines
5.4 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 javax.microedition.khronos.egl.EGL10;
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import javax.microedition.khronos.egl.EGLConfig;
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import javax.microedition.khronos.egl.EGLContext;
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import javax.microedition.khronos.egl.EGLDisplay;
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import javax.microedition.khronos.egl.EGLSurface;
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public class GLController {
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private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
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private static final String LOGTAG = "GeckoGLController";
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private LayerView mView;
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private boolean mSurfaceValid;
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private int mWidth, mHeight;
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private EGL10 mEGL;
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private EGLDisplay mEGLDisplay;
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private EGLConfig mEGLConfig;
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private static final int LOCAL_EGL_OPENGL_ES2_BIT = 4;
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private static final int[] CONFIG_SPEC = {
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EGL10.EGL_RED_SIZE, 5,
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EGL10.EGL_GREEN_SIZE, 6,
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EGL10.EGL_BLUE_SIZE, 5,
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EGL10.EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT,
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EGL10.EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
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EGL10.EGL_NONE
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};
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GLController(LayerView view) {
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mView = view;
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mSurfaceValid = false;
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}
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/* This function is invoked by JNI */
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void resumeCompositorIfValid() {
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synchronized (this) {
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if (!mSurfaceValid) {
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return;
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}
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}
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mView.getListener().compositionResumeRequested(mWidth, mHeight);
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}
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/* Wait until we are allowed to use EGL functions on the Surface backing
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* this window.
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* This function is invoked by JNI */
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synchronized void waitForValidSurface() {
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while (!mSurfaceValid) {
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try {
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wait();
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}
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synchronized void surfaceDestroyed() {
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mSurfaceValid = false;
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notifyAll();
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}
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synchronized void surfaceChanged(int newWidth, int newHeight) {
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mWidth = newWidth;
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mHeight = newHeight;
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mSurfaceValid = true;
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notifyAll();
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}
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public boolean hasValidSurface() {
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return mSurfaceValid;
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}
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private void initEGL() {
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mEGL = (EGL10)EGLContext.getEGL();
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mEGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
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if (mEGLDisplay == EGL10.EGL_NO_DISPLAY) {
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throw new GLControllerException("eglGetDisplay() failed");
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}
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mEGLConfig = chooseConfig();
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// updating the state in the view/controller/client should be
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// done on the main UI thread, not the GL renderer thread
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mView.post(new Runnable() {
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public void run() {
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mView.setViewportSize(mWidth, mHeight);
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}
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});
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}
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private EGLConfig chooseConfig() {
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int[] numConfigs = new int[1];
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if (!mEGL.eglChooseConfig(mEGLDisplay, CONFIG_SPEC, null, 0, numConfigs) ||
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numConfigs[0] <= 0) {
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throw new GLControllerException("No available EGL configurations " +
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getEGLError());
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}
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EGLConfig[] configs = new EGLConfig[numConfigs[0]];
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if (!mEGL.eglChooseConfig(mEGLDisplay, CONFIG_SPEC, configs, numConfigs[0], numConfigs)) {
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throw new GLControllerException("No EGL configuration for that specification " +
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getEGLError());
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}
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// Select the first 565 RGB configuration.
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int[] red = new int[1], green = new int[1], blue = new int[1];
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for (EGLConfig config : configs) {
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mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_RED_SIZE, red);
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mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_GREEN_SIZE, green);
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mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_BLUE_SIZE, blue);
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if (red[0] == 5 && green[0] == 6 && blue[0] == 5) {
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return config;
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}
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}
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throw new GLControllerException("No suitable EGL configuration found");
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}
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/**
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* Provides an EGLSurface without assuming ownership of this surface.
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* This class does not keep a reference to the provided EGL surface; the
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* caller assumes ownership of the surface once it is returned.
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* This function is invoked by JNI */
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private EGLSurface provideEGLSurface() {
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synchronized (this) {
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if (!mSurfaceValid) {
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return null;
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}
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}
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if (mEGL == null) {
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initEGL();
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}
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Object window = mView.getNativeWindow();
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EGLSurface surface = mEGL.eglCreateWindowSurface(mEGLDisplay, mEGLConfig, window, null);
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if (surface == null || surface == EGL10.EGL_NO_SURFACE) {
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throw new GLControllerException("EGL window surface could not be created! " +
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getEGLError());
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}
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return surface;
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}
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private String getEGLError() {
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return "Error " + mEGL.eglGetError();
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}
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public static class GLControllerException extends RuntimeException {
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public static final long serialVersionUID = 1L;
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GLControllerException(String e) {
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super(e);
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}
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}
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}
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