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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.gfx;
import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGL11;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLContext;
import javax.microedition.khronos.egl.EGLDisplay;
import javax.microedition.khronos.egl.EGLSurface;
import javax.microedition.khronos.opengles.GL;
import javax.microedition.khronos.opengles.GL10;
public class GLController {
private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
private static final String LOGTAG = "GeckoGLController";
private LayerView mView;
private int mGLVersion;
private int mWidth, mHeight;
private EGL10 mEGL;
private EGLDisplay mEGLDisplay;
private EGLConfig mEGLConfig;
private EGLContext mEGLContext;
private EGLSurface mEGLSurface;
private static final int LOCAL_EGL_OPENGL_ES2_BIT = 4;
private static final int[] CONFIG_SPEC = {
EGL10.EGL_RED_SIZE, 5,
EGL10.EGL_GREEN_SIZE, 6,
EGL10.EGL_BLUE_SIZE, 5,
EGL10.EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT,
EGL10.EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
EGL10.EGL_NONE
};
public GLController(LayerView view) {
mView = view;
mGLVersion = 2;
}
public void setGLVersion(int version) {
mGLVersion = version;
}
/** You must call this on the same thread you intend to use OpenGL on. */
public void initGLContext() {
initEGLContext();
createEGLSurface();
}
public void disposeGLContext() {
if (mEGL == null) {
return;
}
if (!mEGL.eglMakeCurrent(mEGLDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE,
EGL10.EGL_NO_CONTEXT)) {
throw new GLControllerException("EGL context could not be released! " +
getEGLError());
}
if (mEGLSurface != null) {
if (!mEGL.eglDestroySurface(mEGLDisplay, mEGLSurface)) {
throw new GLControllerException("EGL surface could not be destroyed! " +
getEGLError());
}
mEGLSurface = null;
}
if (mEGLContext != null) {
if (!mEGL.eglDestroyContext(mEGLDisplay, mEGLContext)) {
throw new GLControllerException("EGL context could not be destroyed! " +
getEGLError());
}
mEGLContext = null;
}
}
public GL10 getGL() { return (GL10) mEGLContext.getGL(); }
public EGLDisplay getEGLDisplay() { return mEGLDisplay; }
public EGLConfig getEGLConfig() { return mEGLConfig; }
public EGLContext getEGLContext() { return mEGLContext; }
public EGLSurface getEGLSurface() { return mEGLSurface; }
public LayerView getView() { return mView; }
public boolean hasSurface() {
return mEGLSurface != null;
}
public boolean swapBuffers() {
return mEGL.eglSwapBuffers(mEGLDisplay, mEGLSurface);
}
public synchronized int getWidth() {
return mWidth;
}
public synchronized int getHeight() {
return mHeight;
}
synchronized void surfaceDestroyed() {
notifyAll();
}
synchronized void surfaceChanged(int newWidth, int newHeight) {
mWidth = newWidth;
mHeight = newHeight;
notifyAll();
}
private void initEGL() {
mEGL = (EGL10)EGLContext.getEGL();
mEGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
if (mEGLDisplay == EGL10.EGL_NO_DISPLAY) {
throw new GLControllerException("eglGetDisplay() failed");
}
int[] version = new int[2];
if (!mEGL.eglInitialize(mEGLDisplay, version)) {
throw new GLControllerException("eglInitialize() failed " + getEGLError());
}
mEGLConfig = chooseConfig();
}
private void initEGLContext() {
initEGL();
int[] attribList = { EGL_CONTEXT_CLIENT_VERSION, mGLVersion, EGL10.EGL_NONE };
mEGLContext = mEGL.eglCreateContext(mEGLDisplay, mEGLConfig, EGL10.EGL_NO_CONTEXT,
attribList);
if (mEGLContext == null || mEGLContext == EGL10.EGL_NO_CONTEXT) {
throw new GLControllerException("createContext() failed " +
getEGLError());
}
if (mView.getRenderer() != null) {
GL10 gl = (GL10) mEGLContext.getGL();
mView.getRenderer().onSurfaceCreated(gl, mEGLConfig);
mView.getRenderer().onSurfaceChanged(gl, mWidth, mHeight);
}
}
private EGLConfig chooseConfig() {
int[] numConfigs = new int[1];
if (!mEGL.eglChooseConfig(mEGLDisplay, CONFIG_SPEC, null, 0, numConfigs) ||
numConfigs[0] <= 0) {
throw new GLControllerException("No available EGL configurations " +
getEGLError());
}
EGLConfig[] configs = new EGLConfig[numConfigs[0]];
if (!mEGL.eglChooseConfig(mEGLDisplay, CONFIG_SPEC, configs, numConfigs[0], numConfigs)) {
throw new GLControllerException("No EGL configuration for that specification " +
getEGLError());
}
// Select the first 565 RGB configuration.
int[] red = new int[1], green = new int[1], blue = new int[1];
for (EGLConfig config : configs) {
mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_RED_SIZE, red);
mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_GREEN_SIZE, green);
mEGL.eglGetConfigAttrib(mEGLDisplay, config, EGL10.EGL_BLUE_SIZE, blue);
if (red[0] == 5 && green[0] == 6 && blue[0] == 5) {
return config;
}
}
// if there's no 565 RGB configuration, select another one that fulfils the specification
return configs[0];
}
private void createEGLSurface() {
Object window = mView.getNativeWindow();
mEGLSurface = mEGL.eglCreateWindowSurface(mEGLDisplay, mEGLConfig, window, null);
if (mEGLSurface == null || mEGLSurface == EGL10.EGL_NO_SURFACE) {
throw new GLControllerException("EGL window surface could not be created! " +
getEGLError());
}
if (!mEGL.eglMakeCurrent(mEGLDisplay, mEGLSurface, mEGLSurface, mEGLContext)) {
throw new GLControllerException("EGL surface could not be made into the current " +
"surface! " + getEGLError());
}
if (mView.getRenderer() != null) {
GL10 gl = (GL10) mEGLContext.getGL();
mView.getRenderer().onSurfaceCreated(gl, mEGLConfig);
mView.getRenderer().onSurfaceChanged(gl, mView.getWidth(), mView.getHeight());
}
}
private String getEGLError() {
return "Error " + mEGL.eglGetError();
}
public static class GLControllerException extends RuntimeException {
public static final long serialVersionUID = 1L;
GLControllerException(String e) {
super(e);
}
}
}
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