From b13174e785dd070fcab5f46186da5430514fd9e6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20H=C3=B6glund?= <fredrik@kde.org>
Date: Wed, 9 Jun 2010 20:59:24 +0000
Subject: [PATCH] Tweak the code in the fragment shader to get the Mesa GLSL
 compiler to emit MAD's instead of MUL + ADD.

svn path=/trunk/KDE/kdebase/workspace/; revision=1136438
---
 effects/blur/blurshader.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/effects/blur/blurshader.cpp b/effects/blur/blurshader.cpp
index 25795a05a8..d441bc7d77 100644
--- a/effects/blur/blurshader.cpp
+++ b/effects/blur/blurshader.cpp
@@ -260,7 +260,7 @@ void GLSLBlurShader::init()
     stream2 << "{\n";
     stream2 << "    vec4 sum = texture2D(texUnit, samplePos0) * kernel0;\n";
     for (int i = 1; i < size; i++)
-        stream2 << "    sum += texture2D(texUnit, samplePos" << i << ") * kernel"
+        stream2 << "    sum = sum + texture2D(texUnit, samplePos" << i << ") * kernel"
                 << (i > center ? size - i - 1 : i) << ";\n";
     stream2 << "    gl_FragColor = sum;\n";
     stream2 << "}\n";