Renamed gles_book_examples to gles2_book to make it shorter and more correct....

third_party/gles_book_examples/Chapter_2/Hello_Triangle/Hello_Triangle.c

Index: third_party/gles_book_examples/Chapter_2/Hello_Triangle/Hello_Triangle.c
===================================================================
--- third_party/gles_book_examples/Chapter_2/Hello_Triangle/Hello_Triangle.c	(revision 35873)
+++ third_party/gles_book_examples/Chapter_2/Hello_Triangle/Hello_Triangle.c	(working copy)
@@ -1,109 +0,0 @@
-//
-// 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
-//
-
-// Hello_Triangle.c
-//
-//    This is a simple example that draws a single triangle with
-//    a minimal vertex/fragment shader.  The purpose of this 
-//    example is to demonstrate the basic concepts of 
-//    OpenGL ES 2.0 rendering.
-
-#include "Hello_Triangle.h"
-
-#include <stdlib.h>
-
-///
-// Initialize the shader and program object
-//
-int htInit ( ESContext *esContext )
-{
-   HTUserData *userData = esContext->userData;
-
-   GLbyte vShaderStr[] =  
-      "attribute vec4 vPosition;    \n"
-      "void main()                  \n"
-      "{                            \n"
-      "   gl_Position = vPosition;  \n"
-      "}                            \n";
-   
-   // TODO(alokp): Shaders containing "precision" do not compile.
-   GLbyte fShaderStr[] =  
-      "//precision mediump float;                      \n"
-      "void main()                                   \n"
-      "{                                             \n"
-      "   gl_FragColor = vec4 ( 1.0, 0.0, 0.0, 1.0 );\n"
-      "}                                             \n";
-
-   GLfloat vVertices[] = {  0.0f,  0.5f, 0.0f, 
-                           -0.5f, -0.5f, 0.0f,
-                            0.5f, -0.5f, 0.0f };
-
-   userData->programObject = esLoadProgram ( vShaderStr, fShaderStr );
-   if ( userData->programObject == 0 ) return FALSE;
-
-   // Bind vPosition to attribute 0   
-   glBindAttribLocation ( userData->programObject, 0, "vPosition" );
-
-   glGenBuffers ( 1, &userData->vbo );
-   glBindBuffer ( GL_ARRAY_BUFFER, userData->vbo );
-   glBufferData ( GL_ARRAY_BUFFER, sizeof(vVertices), NULL, GL_STATIC_DRAW );
-   glBufferSubData ( GL_ARRAY_BUFFER, 0, sizeof(vVertices), vVertices );
-
-   glClearColor ( 0.0f, 0.0f, 0.0f, 0.0f );
-   return TRUE;
-}
-
-///
-// Draw a triangle using the shader pair created in Init()
-//
-void htDraw ( ESContext *esContext )
-{
-   HTUserData *userData = esContext->userData;
-
-   // Set the viewport
-   glViewport ( 0, 0, esContext->width, esContext->height );
-   
-   // Clear the color buffer
-   glClear ( GL_COLOR_BUFFER_BIT );
-
-   // Use the program object
-   glUseProgram ( userData->programObject );
-
-   // Load the vertex data
-   glBindBuffer ( GL_ARRAY_BUFFER, userData->vbo );
-   glEnableVertexAttribArray ( 0 );
-   glVertexAttribPointer ( 0, 3, GL_FLOAT, GL_FALSE, 0, 0 );
-
-   glDrawArrays ( GL_TRIANGLES, 0, 3 );
-
-   // Nothing is drawn or application crashes without glFlush.
-   // TODO(alokp): glFlush should not be necessary with SwapBuffers().
-   glFlush();
-}
-
-///
-// Cleanup
-//
-void htShutDown ( ESContext *esContext )
-{
-   HTUserData *userData = esContext->userData;
-
-   // Delete program object
-   if ( userData->programObject != 0 )
-   {
-      glDeleteProgram ( userData->programObject );
-      userData->programObject = 0;
-   }
-   if ( userData->vbo != 0 )
-   {
-      glDeleteBuffers ( 1, &userData->vbo );
-      userData->vbo = 0;
-   }
-}