Changes necessary to compile gpu demos on linux. It is not functional yet jus...

third_party/gles2_book/Common/Source/esUtil.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
 //
 
 // ESUtil.c
 //
 //    A utility library for OpenGL ES.  This library provides a
 //    basic common framework for the example applications in the
 //    OpenGL ES 2.0 Programming Guide.
 //
 
 ///
 //  Includes
 //
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
 
 #include <GLES2/gl2.h>
 
 #include "esUtil.h"
-#include "esUtil_win.h"
 
 ///
 //  esInitContext()
 //
 //      Initialize ES utility context.  This must be called before calling any other
 //      functions.
 //
 void esInitContext ( ESContext *esContext )
 {
    if ( esContext != NULL )
    {
       memset( esContext, 0, sizeof( ESContext) );
    }
 }
 
 ///
 // esLogMessage()
 //
 //    Log an error message to the debug output for the platform
 //
 void esLogMessage ( const char *formatStr, ... )
 {
     va_list params;
     char buf[BUFSIZ];
 
     va_start ( params, formatStr );
-    vsprintf_s ( buf, sizeof(buf),  formatStr, params );
+    vsprintf ( buf, formatStr, params );
     
     printf ( "%s", buf );
     
     va_end ( params );
 }
 
-///
-// esLoadTGA()
-//
-//    Loads a 24-bit TGA image from a file
-//
-char* esLoadTGA ( char *fileName, int *width, int *height )
-{
-   char *buffer;
-
-   if ( WinTGALoad ( fileName, &buffer, width, height ) )
-   {
-      return buffer;
-   }
-
-   return NULL;
-}