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ViEAndroidGLES20.java
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ViEAndroidGLES20.java
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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc.videoengine;
import java.util.concurrent.locks.ReentrantLock;
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.opengles.GL10;
import android.app.ActivityManager;
import android.content.Context;
import android.content.pm.ConfigurationInfo;
import android.opengl.GLSurfaceView;
import android.util.Log;
public class ViEAndroidGLES20 extends GLSurfaceView
implements GLSurfaceView.Renderer {
// True if onSurfaceCreated has been called.
private boolean surfaceCreated = false;
private boolean openGLCreated = false;
// True if NativeFunctionsRegistered has been called.
private boolean nativeFunctionsRegisted = false;
private ReentrantLock nativeFunctionLock = new ReentrantLock();
// Address of Native object that will do the drawing.
private long nativeObject = 0;
private int viewWidth = 0;
private int viewHeight = 0;
public static boolean UseOpenGL2(Object renderWindow) {
return ViEAndroidGLES20.class.isInstance(renderWindow);
}
public ViEAndroidGLES20(Context context) {
super(context);
// Setup the context factory for 2.0 rendering.
// See ContextFactory class definition below
setEGLContextFactory(new ContextFactory());
// We need to choose an EGLConfig that matches the format of
// our surface exactly. This is going to be done in our
// custom config chooser. See ConfigChooser class definition below
// Use RGB 565 without an alpha channel.
setEGLConfigChooser( new ConfigChooser(5, 6, 5, 0, 0, 0) );
this.setRenderer(this);
this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
}
// IsSupported
// Return true if this device support Open GL ES 2.0 rendering.
public static boolean IsSupported(Context context) {
ActivityManager am =
(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
ConfigurationInfo info = am.getDeviceConfigurationInfo();
if(info.reqGlEsVersion >= 0x20000) {
// Open GL ES 2.0 is supported.
return true;
}
return false;
}
public void onDrawFrame(GL10 gl) {
nativeFunctionLock.lock();
if(!nativeFunctionsRegisted || !surfaceCreated) {
nativeFunctionLock.unlock();
return;
}
if(!openGLCreated) {
if(0 != CreateOpenGLNative(nativeObject, viewWidth, viewHeight)) {
return; // Failed to create OpenGL
}
openGLCreated = true; // Created OpenGL successfully
}
DrawNative(nativeObject); // Draw the new frame
nativeFunctionLock.unlock();
}
public void onSurfaceChanged(GL10 gl, int width, int height) {
surfaceCreated = true;
viewWidth = width;
viewHeight = height;
nativeFunctionLock.lock();
if(nativeFunctionsRegisted) {
if(CreateOpenGLNative(nativeObject,width,height) == 0)
openGLCreated = true;
}
nativeFunctionLock.unlock();
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}
public void RegisterNativeObject(long nativeObject) {
nativeFunctionLock.lock();
nativeObject = nativeObject;
nativeFunctionsRegisted = true;
nativeFunctionLock.unlock();
}
public void DeRegisterNativeObject() {
nativeFunctionLock.lock();
nativeFunctionsRegisted = false;
openGLCreated = false;
nativeObject = 0;
nativeFunctionLock.unlock();
}
public void ReDraw() {
if(surfaceCreated) {
// Request the renderer to redraw using the render thread context.
this.requestRender();
}
}
// EGL Context factory used for creating EGL 2.0 context
// on Android 2.1(and later,
// though there are simpler ways in 2.2)
// Code is from the NDK samples\hello-gl2\src\com\android\gl2jni.
private static class ContextFactory
implements GLSurfaceView.EGLContextFactory {
private static int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
public EGLContext createContext(EGL10 egl,
EGLDisplay display,
EGLConfig eglConfig) {
//checkEglError("Before eglCreateContext", egl);
int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
// Create an Open GL ES 2.0 context
EGLContext context = egl.eglCreateContext(display,
eglConfig,
EGL10.EGL_NO_CONTEXT,
attrib_list);
checkEglError("ContextFactory eglCreateContext", egl);
return context;
}
public void destroyContext(EGL10 egl, EGLDisplay display,
EGLContext context) {
egl.eglDestroyContext(display, context);
}
}
private static void checkEglError(String prompt, EGL10 egl) {
int error;
while ((error = egl.eglGetError()) != EGL10.EGL_SUCCESS) {
Log.e("*WEBRTC*", String.format("%s: EGL error: 0x%x", prompt, error));
}
}
// Code is from the NDK samples\hello-gl2\src\com\android\gl2jni
private static class ConfigChooser
implements GLSurfaceView.EGLConfigChooser {
public ConfigChooser(int r, int g, int b, int a, int depth, int stencil) {
mRedSize = r;
mGreenSize = g;
mBlueSize = b;
mAlphaSize = a;
mDepthSize = depth;
mStencilSize = stencil;
}
// This EGL config specification is used to specify 2.0 rendering.
// We use a minimum size of 4 bits for red/green/blue, but will
// perform actual matching in chooseConfig() below.
private static int EGL_OPENGL_ES2_BIT = 4;
private static int[] s_configAttribs2 =
{
EGL10.EGL_RED_SIZE, 4,
EGL10.EGL_GREEN_SIZE, 4,
EGL10.EGL_BLUE_SIZE, 4,
EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL10.EGL_NONE
};
public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
// Get the number of minimally matching EGL configurations
int[] num_config = new int[1];
egl.eglChooseConfig(display, s_configAttribs2, null, 0, num_config);
int numConfigs = num_config[0];
if (numConfigs <= 0) {
throw new IllegalArgumentException("No configs match configSpec");
}
// Allocate then read the array of minimally matching EGL configs
EGLConfig[] configs = new EGLConfig[numConfigs];
egl.eglChooseConfig(display, s_configAttribs2, configs,
numConfigs, num_config);
// Now return the "best" one
return chooseConfig(egl, display, configs);
}
public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display,
EGLConfig[] configs) {
for(EGLConfig config : configs) {
int d = findConfigAttrib(egl, display, config,
EGL10.EGL_DEPTH_SIZE, 0);
int s = findConfigAttrib(egl, display, config,
EGL10.EGL_STENCIL_SIZE, 0);
// We need at least mDepthSize and mStencilSize bits
if (d < mDepthSize || s < mStencilSize)
continue;
// We want an *exact* match for red/green/blue/alpha
int r = findConfigAttrib(egl, display, config,
EGL10.EGL_RED_SIZE, 0);
int g = findConfigAttrib(egl, display, config,
EGL10.EGL_GREEN_SIZE, 0);
int b = findConfigAttrib(egl, display, config,
EGL10.EGL_BLUE_SIZE, 0);
int a = findConfigAttrib(egl, display, config,
EGL10.EGL_ALPHA_SIZE, 0);
if (r == mRedSize && g == mGreenSize &&
b == mBlueSize && a == mAlphaSize)
return config;
}
return null;
}
private int findConfigAttrib(EGL10 egl, EGLDisplay display,
EGLConfig config, int attribute,
int defaultValue) {
if (egl.eglGetConfigAttrib(display, config, attribute, mValue)) {
return mValue[0];
}
return defaultValue;
}
// Subclasses can adjust these values:
protected int mRedSize;
protected int mGreenSize;
protected int mBlueSize;
protected int mAlphaSize;
protected int mDepthSize;
protected int mStencilSize;
private int[] mValue = new int[1];
}
private native int CreateOpenGLNative(long nativeObject,
int width, int height);
private native void DrawNative(long nativeObject);
}