From 5a322df4da3102ae0c8d3bc3071386dc5f21e580 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Wed, 17 Oct 2012 02:24:54 +0300
Subject: Add OpenGL support for Android builds (partially).

---
 src/resources/fboinfo.h           |  5 +++++
 src/resources/image.h             |  6 +++++-
 src/resources/openglimagehelper.h | 11 +++++++++++
 src/resources/subimage.h          | 11 +++++------
 4 files changed, 26 insertions(+), 7 deletions(-)

(limited to 'src/resources')

diff --git a/src/resources/fboinfo.h b/src/resources/fboinfo.h
index 54415e697..dcc76d435 100644
--- a/src/resources/fboinfo.h
+++ b/src/resources/fboinfo.h
@@ -28,8 +28,13 @@
 
 #include "resources/fboinfo.h"
 
+#ifdef ANDROID
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+#else
 #include <SDL_opengl.h>
 #include <GL/glext.h>
+#endif
 
 struct FBOInfo final
 {
diff --git a/src/resources/image.h b/src/resources/image.h
index 3752965bc..36404b2b1 100644
--- a/src/resources/image.h
+++ b/src/resources/image.h
@@ -37,10 +37,14 @@
  * extensions anyway it's safe to just disable the SDL version.
  */
 //#define NO_SDL_GLEXT
-#define GL_GLEXT_PROTOTYPES 1
 
+#ifdef ANDROID
+#include <GLES/gl.h>
+#else
+#define GL_GLEXT_PROTOTYPES 1
 #include <SDL_opengl.h>
 #endif
+#endif
 
 #include <map>
 
diff --git a/src/resources/openglimagehelper.h b/src/resources/openglimagehelper.h
index 02641f85f..b0428f58a 100644
--- a/src/resources/openglimagehelper.h
+++ b/src/resources/openglimagehelper.h
@@ -27,14 +27,25 @@
 #include "main.h"
 
 #ifdef USE_OPENGL
+
+#ifndef GL_TEXTURE_RECTANGLE_ARB
+#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
+#endif
+
 #include "utils/stringvector.h"
 
 #include "resources/imagehelper.h"
 
 #include <SDL.h>
 
+#ifdef ANDROID
+#include <GLES/gl.h>
+#define GL_RGBA8 GL_RGBA8_OES
+#else
 #define GL_GLEXT_PROTOTYPES 1
 #include <SDL_opengl.h>
+#endif
 
 class Dye;
 class Image;
diff --git a/src/resources/subimage.h b/src/resources/subimage.h
index 47d8476cb..69e0debab 100644
--- a/src/resources/subimage.h
+++ b/src/resources/subimage.h
@@ -30,16 +30,15 @@
 
 #ifdef USE_OPENGL
 
-/* The definition of OpenGL extensions by SDL is giving problems with recent
- * gl.h headers, since they also include these definitions. As we're not using
- * extensions anyway it's safe to just disable the SDL version.
- */
-//#define NO_SDL_GLEXT
+#ifdef ANDROID
+#include <GLES/gl.h>
+#else
 #define GL_GLEXT_PROTOTYPES 1
-
 #include <SDL_opengl.h>
 #endif
 
+#endif
+
 #include "resources/image.h"
 
 /**
-- 
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