Android Open Source - GLES20Examples G L E S Util

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2014 Benjamin Malkas/*from  w  w w  .  j a v a  2 s.  co  m*/
 * 
 * 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 r2ai.gles20.examples;

import android.opengl.GLES20;
import android.util.Log;

/**
 * Classic OpenGL ES 2+ helper class to load and compile shaders and display
 * possible shaders errors.
 */
public class GLESUtil {

  public static final String TAG = "GLESUtil";

  public static 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;
  }
  
  public static int createProgram(int vertexShader, int pixelShader) {
      int program = GLES20.glCreateProgram();
      if (program != 0) {
          GLES20.glAttachShader(program, vertexShader);
          GLES20.glAttachShader(program, pixelShader);
          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;
  }
  
}

Java Source Code List

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