From 6b975bfa34c872ed3287967a385b1f193da99097 Mon Sep 17 00:00:00 2001
From: Sylvain Beucler <beuc@beuc.net>
Date: Sun, 11 Mar 2012 09:30:51 +0000
Subject: [PATCH] Support GLES headers

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1104 7f0cb862-5218-0410-a997-914c9d46530a
---
 include/GL/freeglut_std.h      |   12 ++++++++++++
 src/Common/freeglut_internal.h |    6 ++++++
 src/Common/freeglut_misc.c     |    2 ++
 src/Common/freeglut_window.c   |    2 ++
 4 files changed, 22 insertions(+)

diff --git a/include/GL/freeglut_std.h b/include/GL/freeglut_std.h
index ba1b716..d1cd23f 100644
--- a/include/GL/freeglut_std.h
+++ b/include/GL/freeglut_std.h
@@ -119,8 +119,20 @@
 /*
  * Always include OpenGL and GLU headers
  */
+#ifdef ANDROID
+/* Use EGL (implies OpenGL ES) */
+/* TODO: EGL/GLES builds should be more generally defined, possibly by
+   generating this file dynamically */
+#include <EGL/egl.h>
+/* TODO: we probably need 2 builds: -lGLESv1 and -lGLESv2 */
+/* #include <GLES/gl.h> */
+#include <GLES2/gl2.h>
+/* TODO: temporary work-around for e.g. glutWireCube */
+#define GLdouble     GLfloat
+#else
 #include <GL/gl.h>
 #include <GL/glu.h>
+#endif
 
 /*
  * GLUT API macro definitions -- the special key codes:
diff --git a/src/Common/freeglut_internal.h b/src/Common/freeglut_internal.h
index 415b9a4..aab598f 100644
--- a/src/Common/freeglut_internal.h
+++ b/src/Common/freeglut_internal.h
@@ -47,6 +47,9 @@
     || ( defined(__CYGWIN__) && defined(X_DISPLAY_MISSING) )
 #   define  TARGET_HOST_MS_WINDOWS 1
 
+#elif defined (ANDROID)
+#   define  TARGET_HOST_ANDROID  1
+
 #elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__sun)
 #   define  TARGET_HOST_POSIX_X11  1
 
@@ -163,6 +166,9 @@
 #if TARGET_HOST_MS_WINDOWS
 #include "../mswin/freeglut_internal_mswin.h"
 #endif
+#if TARGET_HOST_ANDROID
+#include "../android/freeglut_internal_android.h"
+#endif
 
 
 /* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
diff --git a/src/Common/freeglut_misc.c b/src/Common/freeglut_misc.c
index 18dab12..b0beb39 100644
--- a/src/Common/freeglut_misc.c
+++ b/src/Common/freeglut_misc.c
@@ -109,8 +109,10 @@ static const char* fghErrorString( GLenum error )
   case GL_INVALID_ENUM: return "invalid enumerant";
   case GL_INVALID_VALUE: return "invalid value";
   case GL_INVALID_OPERATION: return "invalid operation";
+#ifndef GL_ES_VERSION_2_0
   case GL_STACK_OVERFLOW: return "stack overflow";
   case GL_STACK_UNDERFLOW: return "stack underflow";
+#endif
   case GL_OUT_OF_MEMORY: return "out of memory";
   case GL_TABLE_TOO_LARGE: return "table too large";
   case GL_INVALID_FRAMEBUFFER_OPERATION: return "invalid framebuffer operation";
diff --git a/src/Common/freeglut_window.c b/src/Common/freeglut_window.c
index 5a29a27..bcbe44d 100644
--- a/src/Common/freeglut_window.c
+++ b/src/Common/freeglut_window.c
@@ -145,11 +145,13 @@ void fgOpenWindow( SFG_Window* window, const char* title,
     window->Window.DoubleBuffered =
         ( fgState.DisplayMode & GLUT_DOUBLE ) ? 1 : 0;
 
+#ifndef EGL_VERSION_1_0  /* No glDrawBuffer/glReadBuffer in GLES */
     if ( ! window->Window.DoubleBuffered )
     {
         glDrawBuffer ( GL_FRONT );
         glReadBuffer ( GL_FRONT );
     }
+#endif
 }
 
 /*
-- 
1.7.10.4