Helper function to compile and link a opengl program. - Android android.opengl

Android examples for android.opengl:OpenGL

  1. HOME
  2. Android
  3. android.opengl
  4. OpenGL

Description

Helper function to compile and link a opengl program.

Demo Code


//package com.java2s;
import android.opengl.GLES20;
import android.util.Log;

public class Main {
    public static final String TAG = "GLUtilities";

    /**//from  w ww.jav  a 2 s  .c om
     * Helper function to compile and link a program.
     * 
     * @param vertexShaderHandle An OpenGL handle to an already-compiled vertex shader.
     * @param fragmentShaderHandle An OpenGL handle to an already-compiled fragment shader.
     * @param attributes Attributes that need to be bound to the program.
     * @return An OpenGL handle to the program.
     */
    public static int createAndLinkProgram(final int vertexShaderHandle,
            final int fragmentShaderHandle) {
        int programHandle = GLES20.glCreateProgram();

        if (programHandle != 0) {
            // Bind the vertex shader to the program.
            GLES20.glAttachShader(programHandle, vertexShaderHandle);

            // Bind the fragment shader to the program.
            GLES20.glAttachShader(programHandle, fragmentShaderHandle);

            // Link the two shaders together into a program.
            GLES20.glLinkProgram(programHandle);

            // Get the link status.
            final int[] linkStatus = new int[1];
            GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS,
                    linkStatus, 0);

            // If the link failed, delete the program.
            if (linkStatus[0] == 0) {
                Log.e(TAG,
                        "Error compiling program: "
                                + GLES20.glGetProgramInfoLog(programHandle));
                GLES20.glDeleteProgram(programHandle);
                programHandle = 0;
            }
        }

        if (programHandle == 0) {
            throw new RuntimeException("Error creating program.");
        }

        return programHandle;
    }
}

Related Tutorials