Android Open Source - 101AndroidApps Shader Tools

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License

The source code is released under:

Licenced under the Creative Commons Attribution 4.0 licence. For full text see http://creativecommons.org/licenses/by/4.0/

Java Source Code

package com.hulzenga.ioi.android.util.open_gl;
/*from  w ww .j a  va  2 s  .  com*/
import android.content.Context;
import android.opengl.GLES20;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ShaderTools {
  private static final String TAG = "SHADER_LOADER";

  private static final String SHADER_BASE_DIRECTORY = "shaders/";

  // ShaderTools cannot be instantiated
  private ShaderTools() {
  }

  public static String readShader(Context context, String file) {
    String shader = "";

    try {
      InputStreamReader inputStreamReader = new InputStreamReader(context.getAssets().open(
          SHADER_BASE_DIRECTORY + file));
      BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

      StringBuilder sb = new StringBuilder();
      String line = bufferedReader.readLine();
      while (line != null) {
        sb.append(line).append("\n");
        line = bufferedReader.readLine();
      }
      bufferedReader.close();
      inputStreamReader.close();
      shader = sb.toString();
    } catch (IOException e) {
      Log.e(TAG, "IOException: failed to read " + file);
    }

    return shader;
  }

  //TODO: implement some more sophisticated exception handling
  public static boolean compileShader(int shaderHandle, String shader) {

    if (shaderHandle != 0) {
      // Pass in the shader source.
      GLES20.glShaderSource(shaderHandle, shader);

      // Compile the shader.
      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) {
        GLES20.glDeleteShader(shaderHandle);
        return false;
      }

      // compilation successful return true
      return true;
    }
    return false;
  }
}

Java Source Code List

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