Android Open Source - Texample2 Utilities

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Back to project page Texample2.

License

The source code is released under:

CC0 1.0 Universal http://creativecommons.org/publicdomain/zero/1.0/legalcode

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Java Source Code

package com.android.texample2;
//from  w ww  .j a va2s  . c  o  m
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

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

public class Utilities {

  public static final int BYTES_PER_FLOAT = 4;
  public static final int BYTES_PER_SHORT = 2;
  private static final String TAG = "Utilities";
  
  public static int createProgram(int vertexShaderHandle, int fragmentShaderHandle, AttribVariable[] variables) {
    int  mProgram = GLES20.glCreateProgram();
    
    if (mProgram != 0) {
          GLES20.glAttachShader(mProgram, vertexShaderHandle);
          GLES20.glAttachShader(mProgram, fragmentShaderHandle);
  
          for (AttribVariable var: variables) {
            GLES20.glBindAttribLocation(mProgram, var.getHandle(), var.getName());
          }   
          
          GLES20.glLinkProgram(mProgram);
       
          final int[] linkStatus = new int[1];
          GLES20.glGetProgramiv(mProgram, GLES20.GL_LINK_STATUS, linkStatus, 0);
  
          if (linkStatus[0] == 0)
          {
            Log.v(TAG, GLES20.glGetProgramInfoLog(mProgram));
              GLES20.glDeleteProgram(mProgram);
              mProgram = 0;
          }
      }
       
      if (mProgram == 0)
      {
          throw new RuntimeException("Error creating program.");
      }
    return mProgram;
  }

  public static int loadShader(int type, String shaderCode){
      int shaderHandle = GLES20.glCreateShader(type);
       
      if (shaderHandle != 0)
      {
          GLES20.glShaderSource(shaderHandle, shaderCode);
          GLES20.glCompileShader(shaderHandle);
      
          // Get the compilation status.
          final int[] compileStatus = new int[1];
          GLES20.glGetShaderiv(shaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
       
          // If the compilation failed, delete the shader.
          if (compileStatus[0] == 0)
          {
            Log.v(TAG, "Shader fail info: " + GLES20.glGetShaderInfoLog(shaderHandle));
              GLES20.glDeleteShader(shaderHandle);
              shaderHandle = 0;
          }
      }
      
       
      if (shaderHandle == 0)
      {
          throw new RuntimeException("Error creating shader " + type);
      }
      return shaderHandle;
  }

  public static FloatBuffer newFloatBuffer(float[] verticesData) {
    FloatBuffer floatBuffer;
    floatBuffer = ByteBuffer.allocateDirect(verticesData.length * BYTES_PER_FLOAT)
        .order(ByteOrder.nativeOrder()).asFloatBuffer();
    floatBuffer.put(verticesData).position(0);
    return floatBuffer;
  }
}

Java Source Code List