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/*
* Copyright (C) 2011 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.camera;
import android.graphics.SurfaceTexture;
import android.os.Handler;
import android.util.Log;
import javax.microedition.khronos.egl.EGL10;
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.GL10;
public class SurfaceTextureRenderer {
public interface FrameDrawer {
public void onDrawFrame(GL10 gl);
}
private static final String TAG = "CAM_" + SurfaceTextureRenderer.class.getSimpleName();
private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
private EGLConfig mEglConfig;
private EGLDisplay mEglDisplay;
private EGLContext mEglContext;
private EGLSurface mEglSurface;
private EGL10 mEgl;
private GL10 mGl;
private Handler mEglHandler;
private FrameDrawer mFrameDrawer;
private Object mRenderLock = new Object();
private Runnable mRenderTask = new Runnable() {
@Override
public void run() {
synchronized (mRenderLock) {
if (mEglDisplay != null && mEglSurface != null) {
mFrameDrawer.onDrawFrame(mGl);
mEgl.eglSwapBuffers(mEglDisplay, mEglSurface);
}
mRenderLock.notifyAll();
}
}
};
public class RenderThread extends Thread {
private Boolean mRenderStopped = false;
@Override
public void run() {
while (true) {
synchronized (mRenderStopped) {
if (mRenderStopped) return;
}
draw(true);
}
}
public void stopRender() {
synchronized (mRenderStopped) {
mRenderStopped = true;
}
}
}
public SurfaceTextureRenderer(SurfaceTexture tex,
Handler handler, FrameDrawer renderer) {
mEglHandler = handler;
mFrameDrawer = renderer;
initialize(tex);
}
public RenderThread createRenderThread() {
return new RenderThread();
}
public void release() {
mEglHandler.post(new Runnable() {
@Override
public void run() {
mEgl.eglDestroySurface(mEglDisplay, mEglSurface);
mEgl.eglDestroyContext(mEglDisplay, mEglContext);
mEgl.eglMakeCurrent(mEglDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE,
EGL10.EGL_NO_CONTEXT);
mEgl.eglTerminate(mEglDisplay);
mEglSurface = null;
mEglContext = null;
mEglDisplay = null;
}
});
}
/**
* Posts a render request to the GL thread.
* @param sync set <code>true</code> if the caller needs it to be
* a synchronous call.
*/
public void draw(boolean sync) {
synchronized (mRenderLock) {
mEglHandler.post(mRenderTask);
if (sync) {
try {
mRenderLock.wait();
} catch (InterruptedException ex) {
Log.v(TAG, "RenderLock.wait() interrupted");
}
}
}
}
private void initialize(final SurfaceTexture target) {
mEglHandler.post(new Runnable() {
@Override
public void run() {
mEgl = (EGL10) EGLContext.getEGL();
mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
throw new RuntimeException("eglGetDisplay failed");
}
int[] version = new int[2];
if (!mEgl.eglInitialize(mEglDisplay, version)) {
throw new RuntimeException("eglInitialize failed");
} else {
Log.v(TAG, "EGL version: " + version[0] + '.' + version[1]);
}
int[] attribList = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
mEglConfig = chooseConfig(mEgl, mEglDisplay);
mEglContext = mEgl.eglCreateContext(
mEglDisplay, mEglConfig, EGL10.EGL_NO_CONTEXT, attribList);
if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
throw new RuntimeException("failed to createContext");
}
mEglSurface = mEgl.eglCreateWindowSurface(
mEglDisplay, mEglConfig, target, null);
if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) {
throw new RuntimeException("failed to createWindowSurface");
}
if (!mEgl.eglMakeCurrent(
mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
throw new RuntimeException("failed to eglMakeCurrent");
}
mGl = (GL10) mEglContext.getGL();
}
});
waitDone();
}
private void waitDone() {
final Object lock = new Object();
synchronized (lock) {
mEglHandler.post(new Runnable() {
@Override
public void run() {
synchronized (lock) {
lock.notifyAll();
}
}
});
try {
lock.wait();
} catch (InterruptedException ex) {
Log.v(TAG, "waitDone() interrupted");
}
}
}
private static void checkEglError(String prompt, EGL10 egl) {
int error;
while ((error = egl.eglGetError()) != EGL10.EGL_SUCCESS) {
Log.e(TAG, String.format("%s: EGL error: 0x%x", prompt, error));
}
}
private static final int EGL_OPENGL_ES2_BIT = 4;
private static final int[] CONFIG_SPEC = new int[] {
EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 0,
EGL10.EGL_DEPTH_SIZE, 0,
EGL10.EGL_STENCIL_SIZE, 0,
EGL10.EGL_NONE
};
private static EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
int[] numConfig = new int[1];
if (!egl.eglChooseConfig(display, CONFIG_SPEC, null, 0, numConfig)) {
throw new IllegalArgumentException("eglChooseConfig failed");
}
int numConfigs = numConfig[0];
if (numConfigs <= 0) {
throw new IllegalArgumentException("No configs match configSpec");
}
EGLConfig[] configs = new EGLConfig[numConfigs];
if (!egl.eglChooseConfig(
display, CONFIG_SPEC, configs, numConfigs, numConfig)) {
throw new IllegalArgumentException("eglChooseConfig#2 failed");
}
return configs[0];
}
}
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