EGLHelper

[cpp]
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.EGLSu易做图ce;
import javax.microedition.khronos.opengles.GL;

import android.view.Su易做图ceHolder;

/**
* Copyright (C) 2008 Google Inc.
*
* 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.
*
* EGLHelper class extracted from GLView
*/

public class EGLHelper
{
        publicEGLHelper()
        {

        }

        /**
         * Initialize EGL for a given configuration spec.
         *
         * @param configSpec
         */
        publicvoid start(int[] configSpec)
        {
                /*
                 * Get an EGL instance
                 */
                mEgl =(EGL10)EGLContext.getEGL();

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

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

                EGLConfig[] configs= new EGLConfig[1];
                int[] num_config= new int[1];
                mEgl.eglChooseConfig(mEglDisplay, configSpec, configs,1, num_config);
                mEglConfig = configs[0];

                /*
                 * Create an OpenGL ES context. This must be done only once, an OpenGL
                 * context is a somewhat heavy object.
                 */
                mEglContext = mEgl.eglCreateContext(mEglDisplay, mEglConfig,
                                EGL10.EGL_NO_CONTEXT,null);

                mEglSu易做图ce =null;
        }

        /*
         * Create and return an OpenGL su易做图ce
         */
        public GL createSu易做图ce(Su易做图ceHolder holder)
        {
                /*
                 * The window size has changed, so we need to create a new su易做图ce.
                 */
                if(mEglSu易做图ce!=null)
                {

                        /*
                         * Unbind and destroy the old EGL su易做图ce, if there is one.
                         */
                        mEgl.eglMakeCurrent(mEglDisplay, EGL10.EGL_NO_SURFACE,
                                        EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT);
                        mEgl.eglDestroySu易做图ce(mEglDisplay, mEglSu易做图ce);
                }

                /*
      &n

补充：软件开发 , C++ ,