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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.effect.cts;
     18 
     19 import android.graphics.Bitmap;
     20 import android.opengl.GLUtils;
     21 import android.opengl.GLES20;
     22 
     23 import javax.microedition.khronos.egl.*;
     24 import javax.microedition.khronos.opengles.*;
     25 
     26 public class GLEnv {
     27 
     28     private EGLContext mEGLContext;
     29     private EGLSurface mEGLSurface;
     30     private EGLDisplay mEGLDisplay;
     31     private EGLConfig  mEGLConfig;
     32 
     33     private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
     34     private static final int EGL_OPENGL_ES2_BIT = 0x0004;
     35 
     36     public GLEnv() {
     37         EGL10 egl = (EGL10)EGLContext.getEGL();
     38 
     39         mEGLDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
     40         checkForEGLErrors("eglGetDisplay");
     41 
     42         int[] version = new int[2];
     43         egl.eglInitialize(mEGLDisplay, version);
     44         int[] configSpec = {
     45             EGL10.EGL_SURFACE_TYPE, EGL10.EGL_PBUFFER_BIT,
     46             EGL10.EGL_RED_SIZE, 8,
     47             EGL10.EGL_GREEN_SIZE, 8,
     48             EGL10.EGL_BLUE_SIZE, 8,
     49             EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
     50             EGL10.EGL_NONE
     51         };
     52         EGLConfig[] configs = new EGLConfig[1];
     53         int[] num_config = new int[1];
     54         egl.eglChooseConfig(mEGLDisplay, configSpec, configs, 1, num_config);
     55         checkForEGLErrors("eglChooseConfig");
     56         if (num_config[0] < 1) {
     57             throw new RuntimeException("Could not find a suitable config for EGL context!");
     58         }
     59         mEGLConfig = configs[0];
     60 
     61         int[] attribs = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
     62         mEGLContext = egl.eglCreateContext(mEGLDisplay, mEGLConfig, EGL10.EGL_NO_CONTEXT, attribs);
     63         checkForEGLErrors("eglCreateContext");
     64 
     65         int[] surfaceSize = { EGL10.EGL_WIDTH, 1, EGL10.EGL_HEIGHT, 1, EGL10.EGL_NONE };
     66         mEGLSurface = egl.eglCreatePbufferSurface(mEGLDisplay, mEGLConfig, surfaceSize);
     67         checkForEGLErrors("eglCreatePbufferSurface");
     68     }
     69 
     70     public void makeCurrent() {
     71         EGL10 egl = (EGL10)EGLContext.getEGL();
     72         egl.eglMakeCurrent(mEGLDisplay, mEGLSurface, mEGLSurface, mEGLContext);
     73         checkForEGLErrors("eglMakeCurrent");
     74     }
     75 
     76     public int generateTexture() {
     77         int textures[] = new int[1];
     78         GLES20.glGenTextures(1, textures, 0);
     79         return textures[0];
     80     }
     81 
     82     public int bitmapToTexture(Bitmap bitmap) {
     83         int texId = generateTexture();
     84         GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId);
     85         GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
     86         return texId;
     87     }
     88 
     89     public void releaseTexture(int texId) {
     90         int[] textures = new int[1];
     91         textures[0] = texId;
     92         GLES20.glDeleteTextures(1, textures, 0);
     93     }
     94 
     95     public void tearDown() {
     96         EGL10 egl = (EGL10)EGLContext.getEGL();
     97         egl.eglDestroySurface(mEGLDisplay, mEGLSurface);
     98         egl.eglDestroyContext(mEGLDisplay, mEGLContext);
     99     }
    100 
    101     public void checkForEGLErrors(String operation) {
    102         EGL10 egl = (EGL10)EGLContext.getEGL();
    103         int error = egl.eglGetError();
    104         if (error != EGL10.EGL_SUCCESS) {
    105             throw new RuntimeException("Operation '" + operation + "' caused EGL error: " + error);
    106         }
    107     }
    108 
    109 }
    110