From 95fcd1c58c596dadafc817ebc0eadc07636c931d Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Mon, 12 May 2014 19:59:06 +0000
Subject: [PATCH] enable transparent background images (ticket #233)
---
Graphics/drawContext.cpp | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Graphics/drawContext.cpp b/Graphics/drawContext.cpp
index d6ce398cfe..a655607550 100644
--- a/Graphics/drawContext.cpp
+++ b/Graphics/drawContext.cpp
@@ -447,6 +447,8 @@ void drawContext::drawBackgroundImage(bool threeD)
h = _bgImageH;
}
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, _bgImageTexture);
glBegin(GL_QUADS);
@@ -472,6 +474,7 @@ void drawContext::drawBackgroundImage(bool threeD)
}
glEnd();
glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
}
void drawContext::initProjection(int xpick, int ypick, int wpick, int hpick)
--
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