From 27b57dbf0cacf65c394165e2b8f8e1bbb258a741 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 9 Sep 2013 14:58:25 +0000
Subject: [PATCH] From Colin Cochran, OES support for point sprites

---
 src/osg/PointSprite.cpp | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/osg/PointSprite.cpp b/src/osg/PointSprite.cpp
index 2d53f61e9..0bf9330bf 100644
--- a/src/osg/PointSprite.cpp
+++ b/src/osg/PointSprite.cpp
@@ -44,17 +44,31 @@ bool PointSprite::checkValidityOfAssociatedModes(osg::State& state) const
 {
 
     bool modeValid = isPointSpriteSupported(state.getContextID());
-    state.setModeValidity(GL_POINT_SPRITE_ARB, modeValid);
 
+#if defined( OSG_GLES1_AVAILABLE ) || defined( OSG_GLES2_AVAILABLE )
+    state.setModeValidity(GL_POINT_SPRITE_OES, modeValid);
+#else
+    state.setModeValidity(GL_POINT_SPRITE_ARB, modeValid);
+#endif
+    
     return modeValid;
 }
 
 void PointSprite::apply(osg::State& state) const
 {
 #if defined( OSG_GL3_AVAILABLE )
+    
     const Point::Extensions* extensions = Point::getExtensions(state.getContextID(),true);
     extensions->glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,_coordOriginMode);
+
+#elif defined( OSG_GLES1_AVAILABLE ) || defined( OSG_GLES2_AVAILABLE )
+    
+    if(!isPointSpriteSupported(state.getContextID())) return;
+    
+    glTexEnvi(GL_POINT_SPRITE_OES, GL_COORD_REPLACE_OES, 1);
+    
 #elif defined( OSG_GL_FIXED_FUNCTION_AVAILABLE )
+
     if(!isPointSpriteSupported(state.getContextID())) return;
 
     glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, 1);
@@ -63,8 +77,10 @@ void PointSprite::apply(osg::State& state) const
 
     if (extensions->isPointSpriteCoordOriginSupported())
         extensions->glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,_coordOriginMode);
+
 #else
     OSG_NOTICE<<"Warning: PointSprite::apply(State&) - not supported."<<std::endl;
+
 #endif
 }
 
@@ -86,7 +102,7 @@ bool PointSprite::isPointSpriteSupported(unsigned int contextID)
     if (!s_extensions[contextID].initialized)
     {
         s_extensions[contextID].initialized = true;
-        s_extensions[contextID].supported = OSG_GL3_FEATURES || isGLExtensionSupported(contextID, "GL_ARB_point_sprite") || isGLExtensionSupported(contextID, "GL_NV_point_sprite");
+        s_extensions[contextID].supported = OSG_GL3_FEATURES || isGLExtensionSupported(contextID, "GL_ARB_point_sprite") || isGLExtensionSupported(contextID, "GL_OES_point_sprite") || isGLExtensionSupported(contextID, "GL_NV_point_sprite");
     }
 
     return s_extensions[contextID].supported;