From b193764e6efc12c456a0e26ef1fbee1da35913dc Mon Sep 17 00:00:00 2001
From: Krisjanis Rijnieks <krisjanis.rijnieks@gmail.com>
Date: Tue, 31 Oct 2017 11:15:50 +0100
Subject: [PATCH] Fix transp png images have border, close #122

---
 src/Surfaces/SurfaceStack.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Surfaces/SurfaceStack.cpp b/src/Surfaces/SurfaceStack.cpp
index e0e9e30..89651a6 100644
--- a/src/Surfaces/SurfaceStack.cpp
+++ b/src/Surfaces/SurfaceStack.cpp
@@ -26,8 +26,14 @@ void SurfaceStack::swap(int a, int b){
 }
 
 void SurfaceStack::draw(){
-	ofEnableAlphaBlending();
 	for(int i = 0; i < _surfaces.size(); ++i){
+		if(_surfaces[i]->getSource()->getType() == SourceType::SOURCE_TYPE_FBO){
+			glEnable(GL_BLEND);
+			glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+		}else{
+			ofEnableAlphaBlending();
+		}
+		
 		_surfaces[i]->draw();
 	}
 }