Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import static android.opengl.GLES20.GL_COMPILE_STATUS;
import static android.opengl.GLES20.GL_FRAGMENT_SHADER;

import static android.opengl.GLES20.glCompileShader;

import static android.opengl.GLES20.glCreateShader;

import static android.opengl.GLES20.glDeleteShader;

import static android.opengl.GLES20.glGetShaderInfoLog;
import static android.opengl.GLES20.glGetShaderiv;

import static android.opengl.GLES20.glShaderSource;

import android.util.Log;

public class Main {
    private static final String TAG = "ShaderHelper";

    /**
     * Loads and compiles a fragment shader, returning the OpenGL object ID.
     */
    public static int compileFragmentShader(String shaderCode) {
        return compileShader(GL_FRAGMENT_SHADER, shaderCode);
    }

    /**
     * Compiles a shader, returning the OpenGL object ID.
     */
    private static int compileShader(int type, String shaderCode) {
        // Create a new shader object.
        final int shaderObjectId = glCreateShader(type);

        if (shaderObjectId == 0) {
            Log.w(TAG, "Could not create new shader.");
            return 0;
        }

        // Pass in the shader source.
        glShaderSource(shaderObjectId, shaderCode);

        // Compile the shader.
        glCompileShader(shaderObjectId);

        // Get the compilation status.
        final int[] compileStatus = new int[1];
        glGetShaderiv(shaderObjectId, GL_COMPILE_STATUS, compileStatus, 0);

        // Print the shader info log to the Android log output.
        Log.v(TAG, "Results of compiling source:" + "\n" + shaderCode + "\n:" + glGetShaderInfoLog(shaderObjectId));

        // Verify the compile status.
        if (compileStatus[0] == 0) {
            // If it failed, delete the shader object.
            glDeleteShader(shaderObjectId);
            Log.w(TAG, "Compilation of shader failed.");
            return 0;
        }

        // Return the shader object ID.
        return shaderObjectId;
    }
}