Java Code Examples for javax.microedition.khronos.egl.EGL10#eglGetDisplay()

public void start() {
  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");
  }
  mEglConfig = mEGLConfigChooser.chooseConfig(mEgl, mEglDisplay);

  mEglContext = mEGLContextFactory.createContext(mEgl, mEglDisplay, mEglConfig);
  if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
    mEglContext = null;
    throwEglException("createContext");
  }

  mEglSurface = null;
}
 

public static void checkConfiguration() {
    final EGL10 egl = (EGL10) EGLContext.getEGL();
    final EGLDisplay eglDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    if (eglDisplay == EGL10.EGL_NO_DISPLAY) {
        throw new RuntimeException("Your device cannot support EGL");
    }

    final int[] version = new int[2];
    if (!egl.eglInitialize(eglDisplay, version)) {
        throw new RuntimeException("Your device cannot support EGL");
    }

    try {
        if (getConfigChooser().chooseConfig(egl, eglDisplay) == null) {
            throw new RuntimeException("Your device cannot support required GLES configuration");
        }
    } catch (final Throwable th) {
        throw new RuntimeException("Your device cannot support required GLES configuration");
    } finally {
        egl.eglTerminate(eglDisplay);
    }
}
 

private static void checkEGLConfigChooserSupport() throws DeviceNotSupportedException {
	/* Get an EGL instance. */
	final EGL10 egl = (EGL10) EGLContext.getEGL();

	/* Get to the default display. */
	final EGLDisplay eglDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

	/* We can now initialize EGL for that display. */
	final int[] version = new int[2];
	egl.eglInitialize(eglDisplay, version);

	final ConfigChooser configChooser = new ConfigChooser(false); // TODO Doesn't correlate to possible multisampling request in EngineOptions...

	try {
		configChooser.chooseConfig(egl, eglDisplay);
	} catch (final IllegalArgumentException e) {
		throw new DeviceNotSupportedException(DeviceNotSupportedCause.EGLCONFIG_NOT_FOUND, e);
	}
}
 

public void start() {
  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");
  }
  mEglConfig = mEGLConfigChooser.chooseConfig(mEgl, mEglDisplay);

  mEglContext = mEGLContextFactory.createContext(mEgl, mEglDisplay, mEglConfig);
  if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
    mEglContext = null;
    throwEglException("createContext");
  }

  mEglSurface = null;
}
 

public void start() {
  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");
  }
  mEglConfig = mEGLConfigChooser.chooseConfig(mEgl, mEglDisplay);

  mEglContext = mEGLContextFactory.createContext(mEgl, mEglDisplay, mEglConfig);
  if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
    mEglContext = null;
    throwEglException("createContext");
  }

  mEglSurface = null;
}
 

public void initEGL() {
    mEGL = (EGL10) GLDebugHelper.wrap(EGLContext.getEGL(),
            GLDebugHelper.CONFIG_CHECK_GL_ERROR
                    | GLDebugHelper.CONFIG_CHECK_THREAD,  null);
    
    mGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    int[] curGLVersion = new int[2];
    mEGL.eglInitialize(mGLDisplay, curGLVersion);

    Log.i("GL", "GL version = " + curGLVersion[0] + "."
            + curGLVersion[1]);

    EGLConfig[] configs = new EGLConfig[1];
    int[] num_config = new int[1];
    mEGL.eglChooseConfig(mGLDisplay, mConfigSpec, configs, 1,
            num_config);
    mGLConfig = configs[0];

    mGLSurface = mEGL.eglCreateWindowSurface(mGLDisplay, mGLConfig, sv
            .getHolder(), null);

    mGLContext = mEGL.eglCreateContext(mGLDisplay, mGLConfig,
            EGL10.EGL_NO_CONTEXT, null);

    mEGL.eglMakeCurrent(mGLDisplay, mGLSurface, mGLSurface, mGLContext);
    mGL = (GL10) GLDebugHelper.wrap(mGLContext.getGL(),
            GLDebugHelper.CONFIG_CHECK_GL_ERROR
                    | GLDebugHelper.CONFIG_CHECK_THREAD
                    | GLDebugHelper.CONFIG_LOG_ARGUMENT_NAMES, null);
}
 

public static List<String> getEglExtensions() {
    Set<String> glExtensions = new HashSet<>();
    EGL10 egl10 = (EGL10) EGLContext.getEGL();
    if (egl10 == null) {
        return new ArrayList<>();
    }
    EGLDisplay display = egl10.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    egl10.eglInitialize(display, new int[2]);
    int cf[] = new int[1];
    if (egl10.eglGetConfigs(display, null, 0, cf)) {
        EGLConfig[] configs = new EGLConfig[cf[0]];
        if (egl10.eglGetConfigs(display, configs, cf[0], cf)) {
            int[] a1 = new int[] {EGL10.EGL_WIDTH, EGL10.EGL_PBUFFER_BIT, EGL10.EGL_HEIGHT, EGL10.EGL_PBUFFER_BIT, EGL10.EGL_NONE};
            int[] a2 = new int[] {12440, EGL10.EGL_PIXMAP_BIT, EGL10.EGL_NONE};
            int[] a3 = new int[1];
            for (int i = 0; i < cf[0]; i++) {
                egl10.eglGetConfigAttrib(display, configs[i], EGL10.EGL_CONFIG_CAVEAT, a3);
                if (a3[0] != EGL10.EGL_SLOW_CONFIG) {
                    egl10.eglGetConfigAttrib(display, configs[i], EGL10.EGL_SURFACE_TYPE, a3);
                    if ((1 & a3[0]) != 0) {
                        egl10.eglGetConfigAttrib(display, configs[i], EGL10.EGL_RENDERABLE_TYPE, a3);
                        if ((1 & a3[0]) != 0) {
                            addExtensionsForConfig(egl10, display, configs[i], a1, null, glExtensions);
                        }
                        if ((4 & a3[0]) != 0) {
                            addExtensionsForConfig(egl10, display, configs[i], a1, a2, glExtensions);
                        }
                    }
                }
            }
        }
    }
    egl10.eglTerminate(display);
    List<String> sorted = new ArrayList<>(glExtensions);
    Collections.sort(sorted);
    return sorted;
}
 

public static int getMaxTextureSize() {
  final int IMAGE_MAX_BITMAP_DIMENSION = 2048;

  EGL10 egl = (EGL10) EGLContext.getEGL();
  EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

  int[] version = new int[2];
  egl.eglInitialize(display, version);

  int[] totalConfigurations = new int[1];
  egl.eglGetConfigs(display, null, 0, totalConfigurations);

  EGLConfig[] configurationsList = new EGLConfig[totalConfigurations[0]];
  egl.eglGetConfigs(display, configurationsList, totalConfigurations[0], totalConfigurations);

  int[] textureSize = new int[1];
  int maximumTextureSize = 0;

  for (int i = 0; i < totalConfigurations[0]; i++) {
    egl.eglGetConfigAttrib(display, configurationsList[i], EGL10.EGL_MAX_PBUFFER_WIDTH, textureSize);

    if (maximumTextureSize < textureSize[0])
      maximumTextureSize = textureSize[0];
  }

  egl.eglTerminate(display);

  return Math.max(maximumTextureSize, IMAGE_MAX_BITMAP_DIMENSION);
}
 

/**
 * Initialize EGL for a given configuration spec.
 */
public void start() {
    /*
     * Get an EGL instance
     */
    mEgl = (EGL10) EGLContext.getEGL();

    /*
     * Get to the default display.
     */
    mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
        throw new RuntimeException("eglGetDisplay failed");
    }

    /*
     * We can now initialize EGL for that display
     */
    int[] version = new int[2];
    if (!mEgl.eglInitialize(mEglDisplay, version)) {
        throw new RuntimeException("eglInitialize failed");
    }
    mEglConfig = chooseEglConfig();

    /*
    * Create an EGL context. We want to do this as rarely as we can, because an
    * EGL context is a somewhat heavy object.
    */
    mEglContext = createContext(mEgl, mEglDisplay, mEglConfig);

    if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
        mEglContext = null;
        throwEglException("createContext");
    }

    mEglSurface = null;
}
 

/**
 * Initialize EGL for a given configuration spec.
 */
public void start() {
    /*
     * Get an EGL instance
     */
    mEgl = (EGL10) EGLContext.getEGL();

    /*
     * Get to the default display.
     */
    mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
        throw new RuntimeException("eglGetDisplay failed");
    }

    /*
     * We can now initialize EGL for that display
     */
    int[] version = new int[2];
    if (!mEgl.eglInitialize(mEglDisplay, version)) {
        throw new RuntimeException("eglInitialize failed");
    }
    mEglConfig = chooseEglConfig();

    /*
    * Create an EGL context. We want to do this as rarely as we can, because an
    * EGL context is a somewhat heavy object.
    */
    mEglContext = createContext(mEgl, mEglDisplay, mEglConfig);

    if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
        mEglContext = null;
        throwEglException("createContext");
    }

    mEglSurface = null;
}
 

private boolean initGL() {
    egl10 = (EGL10) EGLContext.getEGL();

    eglDisplay = egl10.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    if (eglDisplay == EGL10.EGL_NO_DISPLAY) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglGetDisplay failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    }

    int[] version = new int[2];
    if (!egl10.eglInitialize(eglDisplay, version)) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglInitialize failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    }

    int[] configsCount = new int[1];
    EGLConfig[] configs = new EGLConfig[1];
    int[] configSpec = 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, 8,
            EGL10.EGL_DEPTH_SIZE, 0,
            EGL10.EGL_STENCIL_SIZE, 0,
            EGL10.EGL_NONE
    };
    EGLConfig eglConfig;
    if (!egl10.eglChooseConfig(eglDisplay, configSpec, configs, 1, configsCount)) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglChooseConfig failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    } else if (configsCount[0] > 0) {
        eglConfig = configs[0];
    } else {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglConfig not initialized");
        }
        finish();
        return false;
    }

    int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE};
    eglContext = egl10.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
    if (eglContext == null) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglCreateContext failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    }

    if (surfaceTexture instanceof SurfaceTexture) {
        eglSurface = egl10.eglCreateWindowSurface(eglDisplay, eglConfig, surfaceTexture, null);
    } else {
        finish();
        return false;
    }

    if (eglSurface == null || eglSurface == EGL10.EGL_NO_SURFACE) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("createWindowSurface failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    }
    if (!egl10.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext)) {
        if (BuildVars.LOGS_ENABLED) {
            FileLog.e("eglMakeCurrent failed " + GLUtils.getEGLErrorString(egl10.eglGetError()));
        }
        finish();
        return false;
    }

    GLES20.glEnable(GLES20.GL_BLEND);
    GLES20.glDisable(GLES20.GL_DITHER);
    GLES20.glDisable(GLES20.GL_STENCIL_TEST);
    GLES20.glDisable(GLES20.GL_DEPTH_TEST);

    painting.setupShaders();
    checkBitmap();
    painting.setBitmap(bitmap);

    Utils.HasGLError();

    return true;
}
 

private void clearSurface(SurfaceTexture texture)
{
    if(texture == null){
        return;
    }

    EGL10 egl = (EGL10) EGLContext.getEGL();
    EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    egl.eglInitialize(display, null);

    int[] attribList = {
            EGL10.EGL_RED_SIZE, 8,
            EGL10.EGL_GREEN_SIZE, 8,
            EGL10.EGL_BLUE_SIZE, 8,
            EGL10.EGL_ALPHA_SIZE, 8,
            EGL10.EGL_RENDERABLE_TYPE, EGL10.EGL_WINDOW_BIT,
            EGL10.EGL_NONE, 0,
            EGL10.EGL_NONE
    };
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfigs = new int[1];
    egl.eglChooseConfig(display, attribList, configs, configs.length, numConfigs);
    EGLConfig config = configs[0];
    EGLContext context = egl.eglCreateContext(display, config, EGL10.EGL_NO_CONTEXT, new int[]{
            12440, 2,
            EGL10.EGL_NONE
    });
    EGLSurface eglSurface = egl.eglCreateWindowSurface(display, config, texture,
            new int[]{
                    EGL10.EGL_NONE
            });

    egl.eglMakeCurrent(display, eglSurface, eglSurface, context);
    GLES20.glClearColor(0, 0, 0, 1);
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    egl.eglSwapBuffers(display, eglSurface);
    egl.eglDestroySurface(display, eglSurface);
    egl.eglMakeCurrent(display, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE,
            EGL10.EGL_NO_CONTEXT);
    egl.eglDestroyContext(display, context);
    egl.eglTerminate(display);
}
 

public void start() {
	if (LOG_EGL) {
		Log.w("EglHelper", "start() tid=" + Thread.currentThread().getId());
	}
	/*
	 * Get an EGL instance
	 */
	mEgl = (EGL10) EGLContext.getEGL();

	/*
	 * Get to the default display.
	 */
	mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

	if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
		throw new RuntimeException("eglGetDisplay failed");
	}

	/*
	 * We can now initialize EGL for that display
	 */
	int[] version = new int[2];
	if(!mEgl.eglInitialize(mEglDisplay, version)) {
		throw new RuntimeException("eglInitialize failed");
	}
	GLSurfaceView view = mGLSurfaceViewWeakRef.get();
	if (view == null) {
		mEglConfig = null;
		mEglContext = null;
	} else {
		mEglConfig = view.mEGLConfigChooser.chooseConfig(mEgl, mEglDisplay);

		/*
		 * Create an EGL context. We want to do this as rarely as we can, because an
		 * EGL context is a somewhat heavy object.
		 */
		mEglContext = view.mEGLContextFactory.createContext(mEgl, mEglDisplay, mEglConfig);
	}
	if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
		mEglContext = null;
		throwEglException("createContext");
	}
	if (LOG_EGL) {
		Log.w("EglHelper", "createContext " + mEglContext + " tid=" + Thread.currentThread().getId());
	}

	mEglSurface = null;
}
 

Set<String> getGlExtensionsFromDriver() {
    Set<String> glExtensions = new HashSet<>();

    // Get the EGL implementation.
    EGL10 egl = (EGL10) EGLContext.getEGL();
    if (egl == null) {
        getErrPrintWriter().println("Warning: couldn't get EGL");
        return glExtensions;
    }

    // Get the default display and initialize it.
    EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    int[] version = new int[2];
    egl.eglInitialize(display, version);

    // Call getConfigs() in order to find out how many there are.
    int[] numConfigs = new int[1];
    if (!egl.eglGetConfigs(display, null, 0, numConfigs)) {
        getErrPrintWriter().println("Warning: couldn't get EGL config count");
        return glExtensions;
    }

    // Allocate space for all configs and ask again.
    EGLConfig[] configs = new EGLConfig[numConfigs[0]];
    if (!egl.eglGetConfigs(display, configs, numConfigs[0], numConfigs)) {
        getErrPrintWriter().println("Warning: couldn't get EGL configs");
        return glExtensions;
    }

    // Allocate surface size parameters outside of the main loop to cut down
    // on GC thrashing.  1x1 is enough since we are only using it to get at
    // the list of extensions.
    int[] surfaceSize =
            new int[] {
                    EGL10.EGL_WIDTH, 1,
                    EGL10.EGL_HEIGHT, 1,
                    EGL10.EGL_NONE
            };

    // For when we need to create a GLES2.0 context.
    final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
    int[] gles2 = new int[] {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE};

    // For getting return values from eglGetConfigAttrib
    int[] attrib = new int[1];

    for (int i = 0; i < numConfigs[0]; i++) {
        // Get caveat for this config in order to skip slow (i.e. software) configs.
        egl.eglGetConfigAttrib(display, configs[i], EGL10.EGL_CONFIG_CAVEAT, attrib);
        if (attrib[0] == EGL10.EGL_SLOW_CONFIG) {
            continue;
        }

        // If the config does not support pbuffers we cannot do an eglMakeCurrent
        // on it in addExtensionsForConfig(), so skip it here. Attempting to make
        // it current with a pbuffer will result in an EGL_BAD_MATCH error
        egl.eglGetConfigAttrib(display, configs[i], EGL10.EGL_SURFACE_TYPE, attrib);
        if ((attrib[0] & EGL10.EGL_PBUFFER_BIT) == 0) {
            continue;
        }

        final int EGL_OPENGL_ES_BIT = 0x0001;
        final int EGL_OPENGL_ES2_BIT = 0x0004;
        egl.eglGetConfigAttrib(display, configs[i], EGL10.EGL_RENDERABLE_TYPE, attrib);
        if ((attrib[0] & EGL_OPENGL_ES_BIT) != 0) {
            addExtensionsForConfig(egl, display, configs[i], surfaceSize, null, glExtensions);
        }
        if ((attrib[0] & EGL_OPENGL_ES2_BIT) != 0) {
            addExtensionsForConfig(egl, display, configs[i], surfaceSize, gles2, glExtensions);
        }
    }

    // Release all EGL resources.
    egl.eglTerminate(display);

    return glExtensions;
}
 

/**
 * Get the max size of bitmap allowed to be rendered on the device.<br>
 * http://stackoverflow.com/questions/7428996/hw-accelerated-activity-how-to-get-opengl-texture-size-limit.
 */
private static int getMaxTextureSize() {
  // Safe minimum default size
  final int IMAGE_MAX_BITMAP_DIMENSION = 2048;

  try {
    // Get EGL Display
    EGL10 egl = (EGL10) EGLContext.getEGL();
    EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    // Initialise
    int[] version = new int[2];
    egl.eglInitialize(display, version);

    // Query total number of configurations
    int[] totalConfigurations = new int[1];
    egl.eglGetConfigs(display, null, 0, totalConfigurations);

    // Query actual list configurations
    EGLConfig[] configurationsList = new EGLConfig[totalConfigurations[0]];
    egl.eglGetConfigs(display, configurationsList, totalConfigurations[0], totalConfigurations);

    int[] textureSize = new int[1];
    int maximumTextureSize = 0;

    // Iterate through all the configurations to located the maximum texture size
    for (int i = 0; i < totalConfigurations[0]; i++) {
      // Only need to check for width since opengl textures are always squared
      egl.eglGetConfigAttrib(
          display, configurationsList[i], EGL10.EGL_MAX_PBUFFER_WIDTH, textureSize);

      // Keep track of the maximum texture size
      if (maximumTextureSize < textureSize[0]) {
        maximumTextureSize = textureSize[0];
      }
    }

    // Release
    egl.eglTerminate(display);

    // Return largest texture size found, or default
    return Math.max(maximumTextureSize, IMAGE_MAX_BITMAP_DIMENSION);
  } catch (Exception e) {
    return IMAGE_MAX_BITMAP_DIMENSION;
  }
}
 

private boolean initGL(SurfaceTexture texture) {
    mEgl10 = (EGL10) EGLContext.getEGL();

    mEglDisplay = mEgl10.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    if (mEglDisplay == EGL10.EGL_NO_DISPLAY) return false;

    int[] version = new int[2];
    if (!mEgl10.eglInitialize(mEglDisplay, version)) return false;

    int[] configsCount = new int[1];
    EGLConfig[] configs = new EGLConfig[1];
    int[] configSpec = {
            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, 8,
            EGL10.EGL_DEPTH_SIZE, 0,
            EGL10.EGL_STENCIL_SIZE, 0,
            EGL10.EGL_NONE
    };

    EGLConfig eglConfig = null;
    if (!mEgl10.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) {
        return false;
    } else if (configsCount[0] > 0) {
        eglConfig = configs[0];
    }
    if (eglConfig == null) return false;

    mEglContext = mEgl10.eglCreateContext(
            mEglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT,
            new int[]{EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE});
    mEglSurface = mEgl10.eglCreateWindowSurface(mEglDisplay, eglConfig, texture, null);

    if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) return false;
    if (!mEgl10.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) return false;

    return true;
}
 

private void eglSetup(int width, int height) {
    mEGL = (EGL10) EGLContext.getEGL();
    mEGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    if (mEGLDisplay == EGL10.EGL_NO_DISPLAY) {
        throw new RuntimeException("unable to get EGL10 display");
    }

    if (!mEGL.eglInitialize(mEGLDisplay, null)) {
        mEGLDisplay = null;
        throw new RuntimeException("unable to initialize EGL10");
    }

    int[] attribList = {
            EGL10.EGL_RED_SIZE, 8,
            EGL10.EGL_GREEN_SIZE, 8,
            EGL10.EGL_BLUE_SIZE, 8,
            EGL10.EGL_ALPHA_SIZE, 8,
            EGL10.EGL_SURFACE_TYPE, EGL10.EGL_PBUFFER_BIT,
            EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
            EGL10.EGL_NONE
    };
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfigs = new int[1];
    if (!mEGL.eglChooseConfig(mEGLDisplay, attribList, configs, configs.length, numConfigs)) {
        throw new RuntimeException("unable to find RGB888+pbuffer EGL config");
    }
    int[] attrib_list = {
            EGL_CONTEXT_CLIENT_VERSION, 2,
            EGL10.EGL_NONE
    };
    mEGLContext = mEGL.eglCreateContext(mEGLDisplay, configs[0], EGL10.EGL_NO_CONTEXT, attrib_list);
    checkEglError("eglCreateContext");
    if (mEGLContext == null) {
        throw new RuntimeException("null context");
    }
    int[] surfaceAttribs = {
            EGL10.EGL_WIDTH, width,
            EGL10.EGL_HEIGHT, height,
            EGL10.EGL_NONE
    };
    mEGLSurface = mEGL.eglCreatePbufferSurface(mEGLDisplay, configs[0], surfaceAttribs);
    checkEglError("eglCreatePbufferSurface");
    if (mEGLSurface == null) {
        throw new RuntimeException("surface was null");
    }
}
 

/**
 * Get the max size of bitmap allowed to be rendered on the device.<br>
 * http://stackoverflow.com/questions/7428996/hw-accelerated-activity-how-to-get-opengl-texture-size-limit.
 */
private static int getMaxTextureSize() {
    // Safe minimum default size
    final int IMAGE_MAX_BITMAP_DIMENSION = 2048;

    try {
        // Get EGL Display
        EGL10 egl = (EGL10) EGLContext.getEGL();
        EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

        // Initialise
        int[] version = new int[2];
        egl.eglInitialize(display, version);

        // Query total number of configurations
        int[] totalConfigurations = new int[1];
        egl.eglGetConfigs(display, null, 0, totalConfigurations);

        // Query actual list configurations
        EGLConfig[] configurationsList = new EGLConfig[totalConfigurations[0]];
        egl.eglGetConfigs(display, configurationsList, totalConfigurations[0], totalConfigurations);

        int[] textureSize = new int[1];
        int maximumTextureSize = 0;

        // Iterate through all the configurations to located the maximum texture size
        for (int i = 0; i < totalConfigurations[0]; i++) {
            // Only need to check for width since opengl textures are always squared
            egl.eglGetConfigAttrib(display, configurationsList[i], EGL10.EGL_MAX_PBUFFER_WIDTH, textureSize);

            // Keep track of the maximum texture size
            if (maximumTextureSize < textureSize[0]) {
                maximumTextureSize = textureSize[0];
            }
        }

        // Release
        egl.eglTerminate(display);

        // Return largest texture size found, or default
        return Math.max(maximumTextureSize, IMAGE_MAX_BITMAP_DIMENSION);
    } catch (Exception e) {
        return IMAGE_MAX_BITMAP_DIMENSION;
    }
}
 

/**
 * Prepares EGL.  We want a GLES 2.0 context and a surface that supports pbuffer.
 */
private void eglSetup(int width, int height) {
    mEGL = (EGL10) EGLContext.getEGL();
    mEGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    if (!mEGL.eglInitialize(mEGLDisplay, null)) {
        throw new RuntimeException("unable to initialize EGL10");
    }
    // Configure EGL for pbuffer and OpenGL ES 2.0.  We want enough RGB bits
    // to be able to tell if the frame is reasonable.
    int[] attribList = {
            EGL10.EGL_RED_SIZE, 8,
            EGL10.EGL_GREEN_SIZE, 8,
            EGL10.EGL_BLUE_SIZE, 8,
            EGL10.EGL_SURFACE_TYPE, EGL10.EGL_PBUFFER_BIT,
            EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
            EGL10.EGL_NONE
    };
    EGLConfig[] configs = new EGLConfig[1];
    int[] numConfigs = new int[1];
    if (!mEGL.eglChooseConfig(mEGLDisplay, attribList, configs, 1, numConfigs)) {
        throw new RuntimeException("unable to find RGB888+pbuffer EGL config");
    }
    // Configure context for OpenGL ES 2.0.
    int[] attrib_list = {
            EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
            EGL10.EGL_NONE
    };
    mEGLContext = mEGL.eglCreateContext(mEGLDisplay, configs[0], EGL10.EGL_NO_CONTEXT,
            attrib_list);
    checkEglError("eglCreateContext");
    if (mEGLContext == null) {
        throw new RuntimeException("null context");
    }
    // Create a pbuffer surface.  By using this for output, we can use glReadPixels
    // to test values in the output.
    int[] surfaceAttribs = {
            EGL10.EGL_WIDTH, width,
            EGL10.EGL_HEIGHT, height,
            EGL10.EGL_NONE
    };
    mEGLSurface = mEGL.eglCreatePbufferSurface(mEGLDisplay, configs[0], surfaceAttribs);
    checkEglError("eglCreatePbufferSurface");
    if (mEGLSurface == null) {
        throw new RuntimeException("surface was null");
    }
}
 

/**
 * Initialize EGL for a given configuration spec.
 * @param configSpec
 */
public void start() {
    if (LOG_EGL) {
        Log.w("EglHelper", "start() tid=" + Thread.currentThread().getId());
    }
    /*
     * Get an EGL instance
     */
    mEgl = (EGL10) EGLContext.getEGL();

    /*
     * Get to the default display.
     */
    mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

    if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
        throw new RuntimeException("eglGetDisplay failed");
    }

    /*
     * We can now initialize EGL for that display
     */
    int[] version = new int[2];
    if(!mEgl.eglInitialize(mEglDisplay, version)) {
        throw new RuntimeException("eglInitialize failed");
    }
    GLTextureView view = mGLTextureViewWeakRef.get();
    if (view == null) {
        mEglConfig = null;
        mEglContext = null;
    } else {
        mEglConfig = view.mEGLConfigChooser.chooseConfig(mEgl, mEglDisplay);

        /*
        * Create an EGL context. We want to do this as rarely as we can, because an
        * EGL context is a somewhat heavy object.
        */
        mEglContext = view.mEGLContextFactory.createContext(mEgl, mEglDisplay, mEglConfig);
    }
    if (mEglContext == null || mEglContext == EGL10.EGL_NO_CONTEXT) {
        mEglContext = null;
        throwEglException("createContext");
    }
    if (LOG_EGL) {
        Log.w("EglHelper", "createContext " + mEglContext + " tid=" + Thread.currentThread().getId());
    }

    mEglSurface = null;
}