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

third_party/gles_book_examples/Chapter_8/Simple_VertexShader/Simple_VertexShader.c

Index: third_party/gles_book_examples/Chapter_8/Simple_VertexShader/Simple_VertexShader.c
===================================================================
--- third_party/gles_book_examples/Chapter_8/Simple_VertexShader/Simple_VertexShader.c	(revision 35873)
+++ third_party/gles_book_examples/Chapter_8/Simple_VertexShader/Simple_VertexShader.c	(working copy)
@@ -1,151 +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
-//
-
-// Simple_VertexShader.c
-//
-//    This is a simple example that draws a rotating cube in perspective
-//    using a vertex shader to transform the object
-//
-
-#include "Simple_VertexShader.h"
-#include <stdlib.h>
-
-///
-// Initialize the shader and program object
-//
-int svsInit ( ESContext *esContext )
-{
-   SVSUserData *userData = esContext->userData;
-   GLbyte vShaderStr[] =  
-      "uniform mat4 u_mvpMatrix;                   \n"
-      "attribute vec4 a_position;                  \n"
-      "void main()                                 \n"
-      "{                                           \n"
-      "   gl_Position = u_mvpMatrix * a_position;  \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";
-
-   // Load the shaders and get a linked program object
-   userData->programObject = esLoadProgram ( vShaderStr, fShaderStr );
-
-   // Get the attribute locations
-   userData->positionLoc = glGetAttribLocation ( userData->programObject, "a_position" );
-
-   // Get the uniform locations
-   userData->mvpLoc = glGetUniformLocation( userData->programObject, "u_mvpMatrix" );
-   
-   // Generate the vertex data
-   userData->numIndices = esGenCube( 1.0, &userData->vertices,
-                                     NULL, NULL, &userData->indices );
-   
-   // Starting rotation angle for the cube
-   userData->angle = 45.0f;
-
-   glClearColor ( 0.0f, 0.0f, 0.0f, 0.0f );
-   return TRUE;
-}
-
-///
-// Update MVP matrix based on time
-//
-void svsUpdate ( ESContext *esContext, float deltaTime )
-{
-   SVSUserData *userData = (SVSUserData*) esContext->userData;
-   ESMatrix perspective;
-   ESMatrix modelview;
-   float    aspect;
-   
-   // Compute a rotation angle based on time to rotate the cube
-   userData->angle += ( deltaTime * 40.0f );
-   if( userData->angle >= 360.0f )
-      userData->angle -= 360.0f;
-
-   // Compute the window aspect ratio
-   aspect = (GLfloat) esContext->width / (GLfloat) esContext->height;
-   
-   // Generate a perspective matrix with a 60 degree FOV
-   esMatrixLoadIdentity( &perspective );
-   esPerspective( &perspective, 60.0f, aspect, 1.0f, 20.0f );
-
-   // Generate a model view matrix to rotate/translate the cube
-   esMatrixLoadIdentity( &modelview );
-
-   // Translate away from the viewer
-   esTranslate( &modelview, 0.0, 0.0, -2.0 );
-
-   // Rotate the cube
-   esRotate( &modelview, userData->angle, 1.0, 0.0, 1.0 );
-   
-   // Compute the final MVP by multiplying the 
-   // modevleiw and perspective matrices together
-   esMatrixMultiply( &userData->mvpMatrix, &modelview, &perspective );
-}
-
-///
-// Draw a triangle using the shader pair created in Init()
-//
-void svsDraw ( ESContext *esContext )
-{
-   SVSUserData *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 position
-   glVertexAttribPointer ( userData->positionLoc, 3, GL_FLOAT, 
-                           GL_FALSE, 3 * sizeof(GLfloat), userData->vertices );
-   
-   glEnableVertexAttribArray ( userData->positionLoc );
-   
-   
-   // Load the MVP matrix
-   glUniformMatrix4fv( userData->mvpLoc, 1, GL_FALSE, (GLfloat*) &userData->mvpMatrix.m[0][0] );
-   
-   // Draw the cube
-   glDrawElements ( GL_TRIANGLES, userData->numIndices, GL_UNSIGNED_INT, userData->indices );
-
-   // TODO(alokp): glFlush should not be necessary with SwapBuffers.
-   glFlush();
-}
-
-///
-// Cleanup
-//
-void svsShutDown ( ESContext *esContext )
-{
-   SVSUserData *userData = esContext->userData;
-
-   if ( userData->vertices != NULL )
-   {
-      free ( userData->vertices );
-   }
-
-   if ( userData->indices != NULL )
-   {
-      free ( userData->indices );
-   }
-
-   // Delete program object
-   glDeleteProgram ( userData->programObject );
-}