Merge "Preparing the new GL depth test."

                <category android:name="com.android.test.hwui.TEST" />

            </intent-filter>

        </activity>

        <activity

                android:name="GLDepthTestActivity"

                android:label="Reordering/OpenGL Depth Test">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="com.android.test.hwui.TEST" />

            </intent-filter>

        </activity>

    </application>

</manifest>

/*

 * Copyright (C) 2014 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.test.hwui;

import android.app.Activity;

import android.app.ActivityManager;

import android.content.Context;

import android.content.pm.ConfigurationInfo;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

import android.opengl.GLUtils;

import android.opengl.Matrix;

import android.os.Bundle;

import android.os.SystemClock;

import android.util.Log;

import java.io.IOException;

import java.io.InputStream;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.FloatBuffer;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

/**

 * This sample shows how to check for OpenGL ES 2.0 support at runtime, and then

 * use either OpenGL ES 1.0 or OpenGL ES 2.0, as appropriate.

 */

public class GLDepthTestActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        mGLSurfaceView = new GLSurfaceView(this);

        if (detectOpenGLES20()) {

            // Tell the surface view we want to create an OpenGL ES

            // 2.0-compatible

            // context, and set an OpenGL ES 2.0-compatible renderer.

            mGLSurfaceView.setEGLContextClientVersion(2);

            mGLSurfaceView.setRenderer(new GLES20TriangleRenderer(this));

        } else {

            throw new IllegalStateException("Can't find OGL ES2.0 context");

        }

        setContentView(mGLSurfaceView);

    }

    private boolean detectOpenGLES20() {

        ActivityManager am =

                (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

        ConfigurationInfo info = am.getDeviceConfigurationInfo();

        return (info.reqGlEsVersion >= 0x20000);

    }

    @Override

    protected void onResume() {

        // Ideally a game should implement onResume() and onPause()

        // to take appropriate action when the activity looses focus

        super.onResume();

        mGLSurfaceView.onResume();

    }

    @Override

    protected void onPause() {

        // Ideally a game should implement onResume() and onPause()

        // to take appropriate action when the activity looses focus

        super.onPause();

        mGLSurfaceView.onPause();

    }

    private GLSurfaceView mGLSurfaceView;

    /*

     * Copyright (C) 2009 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.

     */

    class GLES20TriangleRenderer implements GLSurfaceView.Renderer {

        public GLES20TriangleRenderer(Context context) {

            mContext = context;

            mTriangleVertices = ByteBuffer.allocateDirect(mTriangleVerticesData.length

                    * FLOAT_SIZE_BYTES).order(ByteOrder.nativeOrder()).asFloatBuffer();

            mTriangleVertices.put(mTriangleVerticesData).position(0);

        }

        public void onDrawFrame(GL10 glUnused) {

            // Ignore the passed-in GL10 interface, and use the GLES20

            // class's static methods instead.

            GLES20.glClearColor(0.0f, 0.0f, 1.0f, 1.0f);

            GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);

            GLES20.glUseProgram(mProgram);

            checkGlError("glUseProgram");

            GLES20.glActiveTexture(GLES20.GL_TEXTURE0);

            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureID);

            mTriangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET);

            GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false,

                    TRIANGLE_VERTICES_DATA_STRIDE_BYTES, mTriangleVertices);

            checkGlError("glVertexAttribPointer maPosition");

            mTriangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET);

            GLES20.glEnableVertexAttribArray(maPositionHandle);

            checkGlError("glEnableVertexAttribArray maPositionHandle");

            GLES20.glVertexAttribPointer(maTextureHandle, 2, GLES20.GL_FLOAT, false,

                    TRIANGLE_VERTICES_DATA_STRIDE_BYTES, mTriangleVertices);

            checkGlError("glVertexAttribPointer maTextureHandle");

            GLES20.glEnableVertexAttribArray(maTextureHandle);

            checkGlError("glEnableVertexAttribArray maTextureHandle");

            long time = SystemClock.uptimeMillis() % 4000L;

            float angle = 0.090f * ((int) time);

            Matrix.setRotateM(mMMatrix, 0, angle, 0, 0, 1.0f);

            Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, mMMatrix, 0);

            Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);

            GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, mMVPMatrix, 0);

            GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 3);

            checkGlError("glDrawArrays");

        }

        public void onSurfaceChanged(GL10 glUnused, int width, int height) {

            // Ignore the passed-in GL10 interface, and use the GLES20

            // class's static methods instead.

            GLES20.glViewport(0, 0, width, height);

            float ratio = (float) width / height;

            Matrix.frustumM(mProjMatrix, 0, -ratio, ratio, -1, 1, 3, 7);

        }

        public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {

            // Ignore the passed-in GL10 interface, and use the GLES20

            // class's static methods instead.

            mProgram = createProgram(mVertexShader, mFragmentShader);

            if (mProgram == 0) {

                return;

            }

            maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");

            checkGlError("glGetAttribLocation aPosition");

            if (maPositionHandle == -1) {

                throw new RuntimeException("Could not get attrib location for aPosition");

            }

            maTextureHandle = GLES20.glGetAttribLocation(mProgram, "aTextureCoord");

            checkGlError("glGetAttribLocation aTextureCoord");

            if (maTextureHandle == -1) {

                throw new RuntimeException("Could not get attrib location for aTextureCoord");

            }

            muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");

            checkGlError("glGetUniformLocation uMVPMatrix");

            if (muMVPMatrixHandle == -1) {

                throw new RuntimeException("Could not get attrib location for uMVPMatrix");

            }

            /*

             * Create our texture. This has to be done each time the surface is

             * created.

             */

            int[] textures = new int[1];

            GLES20.glGenTextures(1, textures, 0);

            mTextureID = textures[0];

            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureID);

            GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,

                    GLES20.GL_NEAREST);

            GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,

                    GLES20.GL_TEXTURE_MAG_FILTER,

                    GLES20.GL_LINEAR);

            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,

                    GLES20.GL_REPEAT);

            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,

                    GLES20.GL_REPEAT);

            InputStream is = mContext.getResources()

                    .openRawResource(R.drawable.robot);

            Bitmap bitmap;

            try {

                bitmap = BitmapFactory.decodeStream(is);

            } finally {

                try {

                    is.close();

                } catch (IOException e) {

                    // Ignore.

                }

            }

            GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);

            bitmap.recycle();

            Matrix.setLookAtM(mVMatrix, 0, 0, 0, -5, 0f, 0f, 0f, 0f, 1.0f, 0.0f);

        }

        private int loadShader(int shaderType, String source) {

            int shader = GLES20.glCreateShader(shaderType);

            if (shader != 0) {

                GLES20.glShaderSource(shader, source);

                GLES20.glCompileShader(shader);

                int[] compiled = new int[1];

                GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);

                if (compiled[0] == 0) {

                    Log.e(TAG, "Could not compile shader " + shaderType + ":");

                    Log.e(TAG, GLES20.glGetShaderInfoLog(shader));

                    GLES20.glDeleteShader(shader);

                    shader = 0;

                }

            }

            return shader;

        }

        private int createProgram(String vertexSource, String fragmentSource) {

            int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);

            if (vertexShader == 0) {

                return 0;

            }

            int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);

            if (pixelShader == 0) {

                return 0;

            }

            int program = GLES20.glCreateProgram();

            if (program != 0) {

                GLES20.glAttachShader(program, vertexShader);

                checkGlError("glAttachShader");

                GLES20.glAttachShader(program, pixelShader);

                checkGlError("glAttachShader");

                GLES20.glLinkProgram(program);

                int[] linkStatus = new int[1];

                GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);

                if (linkStatus[0] != GLES20.GL_TRUE) {

                    Log.e(TAG, "Could not link program: ");

                    Log.e(TAG, GLES20.glGetProgramInfoLog(program));

                    GLES20.glDeleteProgram(program);

                    program = 0;

                }

            }

            return program;

        }

        private void checkGlError(String op) {

            int error;

            while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {

                Log.e(TAG, op + ": glError " + error);

                throw new RuntimeException(op + ": glError " + error);

            }

        }

        private static final int FLOAT_SIZE_BYTES = 4;

        private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES;

        private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0;

        private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3;

        private final float[] mTriangleVerticesData = {

                                // X, Y, Z, U, V

                -1.0f, -0.5f, 0, -0.5f, 0.0f,

                1.0f, -0.5f, 0, 1.5f, -0.0f,

                0.0f, 1.11803399f, 0, 0.5f, 1.61803399f };

        private FloatBuffer mTriangleVertices;

        private final String mVertexShader =

                "uniform mat4 uMVPMatrix;\n" +

                        "attribute vec4 aPosition;\n" +

                        "attribute vec2 aTextureCoord;\n" +

                        "varying vec2 vTextureCoord;\n" +

                        "void main() {\n" +

                        "  gl_Position = uMVPMatrix * aPosition;\n" +

                        "  vTextureCoord = aTextureCoord;\n" +

                        "}\n";

        private final String mFragmentShader =

                "precision mediump float;\n" +

                        "varying vec2 vTextureCoord;\n" +

                        "uniform sampler2D sTexture;\n" +

                        "void main() {\n" +

                        "  gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +

                        "}\n";

        private float[] mMVPMatrix = new float[16];

        private float[] mProjMatrix = new float[16];

        private float[] mMMatrix = new float[16];

        private float[] mVMatrix = new float[16];

        private int mProgram;

        private int mTextureID;

        private int muMVPMatrixHandle;

        private int maPositionHandle;

        private int maTextureHandle;

        private Context mContext;

        private static final String TAG = "GLES20TriangleRenderer";

    }

}