From 03f20436b531dd32924be3103033c77be16d8a86 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Sat, 20 Feb 2016 23:43:09 -0800
Subject: [PATCH] Shaders: Fix AGS-001 shader with some bad drivers

---
 CHANGES                                   | 1 +
 res/shaders/ags001.shader/ags001-light.fs | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index b2d64cfce..7a1aabc80 100644
--- a/CHANGES
+++ b/CHANGES
@@ -12,6 +12,7 @@ Bugfixes:
  - SDL: Fix potential joystick crash in games with rumble
  - SDL: Fix axes being mapped wrong
  - Qt: Fix initial state of key mapping
+ - Shaders: Fix AGS-001 shader with some bad drivers
 Misc:
  - GBA: Slightly optimize GBAProcessEvents
  - Qt: Add preset for DualShock 4
diff --git a/res/shaders/ags001.shader/ags001-light.fs b/res/shaders/ags001.shader/ags001-light.fs
index 5d2e6f8a5..a271de9e3 100644
--- a/res/shaders/ags001.shader/ags001-light.fs
+++ b/res/shaders/ags001.shader/ags001-light.fs
@@ -13,7 +13,7 @@ void main() {
 	float dc = pow(decay, -lightBrightness);
 	float s = (sp - dc) / (sp + dc);
 	vec2 radius = (texCoord.st - vec2(0.5, 0.5)) * vec2(coeff * s);
-	radius = pow(radius, vec2(4.0));
+	radius = pow(abs(radius), vec2(4.0));
 	vec3 bleed = vec3(0.12, 0.14, 0.19);
 	bleed += (dot(radius, radius) + vec3(0.02, 0.03, 0.05)) * vec3(0.14, 0.18, 0.2);