Added EGL based GLContext....

third_party/gles2_book/Chapter_8/Simple_VertexShader/Simple_VertexShader.c

 //
 // Book:      OpenGL(R) ES 2.0 Programming Guide
 // Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
 // ISBN-10:   0321502795
 // ISBN-13:   9780321502797
 // Publisher: Addison-Wesley Professional
 // URLs:      http://safari.informit.com/9780321563835
 //            http://www.opengles-book.com
 //
 
@@ skipping 41 matching lines @@
    // Get the uniform locations
    userData->mvpLoc = glGetUniformLocation( userData->programObject, "u_mvpMatrix" );
    
    // Generate the vertex data
    userData->numIndices = esGenCube( 1.0, &vertices, NULL, NULL, &indices );
    glGenBuffers ( 2, userData->vboIds );
    glBindBuffer ( GL_ARRAY_BUFFER, userData->vboIds[0] );
    glBufferData ( GL_ARRAY_BUFFER, 3 * numVertices * sizeof(GLfloat),
                   vertices, GL_STATIC_DRAW );
    glBindBuffer ( GL_ELEMENT_ARRAY_BUFFER, userData->vboIds[1] );
-   glBufferData ( GL_ELEMENT_ARRAY_BUFFER, userData->numIndices * sizeof(GL_UNSIGNED_SHORT),
+   glBufferData ( GL_ELEMENT_ARRAY_BUFFER, userData->numIndices * sizeof(GLushort),
                   indices, GL_STATIC_DRAW );
    if ( vertices != NULL ) free ( vertices );
    if ( indices != NULL ) free ( indices );
 
    // Starting rotation angle for the cube
    userData->angle = 45.0f;
 
    glClearColor ( 0.0f, 0.0f, 0.0f, 0.0f );
    return TRUE;
 }
@@ skipping 68 matching lines @@
 void svsShutDown ( ESContext *esContext )
 {
    SVSUserData *userData = esContext->userData;
 
    // Delete program object
    glDeleteBuffers ( 2, userData->vboIds );
 
    // Delete program object
    glDeleteProgram ( userData->programObject );
 }