From c80666c3754ea335986b1456677d8b87fc7d6473 Mon Sep 17 00:00:00 2001
From: Brad Larson <larson@sunsetlakesoftware.com>
Date: Fri, 13 Sep 2013 17:18:16 -0500
Subject: [PATCH] Fixed two precision issues with the levels and lookup
 filters.

---
 framework/Source/GPUImageLevelsFilter.m | 12 ++++++------
 framework/Source/GPUImageLookupFilter.m |  8 ++++----
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/framework/Source/GPUImageLevelsFilter.m b/framework/Source/GPUImageLevelsFilter.m
index 4844340ba..158815fd5 100644
--- a/framework/Source/GPUImageLevelsFilter.m
+++ b/framework/Source/GPUImageLevelsFilter.m
@@ -23,15 +23,15 @@
  varying highp vec2 textureCoordinate;
  
  uniform sampler2D inputImageTexture;
- uniform lowp vec3 levelMinimum;
- uniform lowp vec3 levelMiddle;
- uniform lowp vec3 levelMaximum;
- uniform lowp vec3 minOutput;
- uniform lowp vec3 maxOutput;
+ uniform mediump vec3 levelMinimum;
+ uniform mediump vec3 levelMiddle;
+ uniform mediump vec3 levelMaximum;
+ uniform mediump vec3 minOutput;
+ uniform mediump vec3 maxOutput;
  
  void main()
  {
-     lowp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
+     mediump vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
      
      gl_FragColor = vec4(LevelsControl(textureColor.rgb, levelMinimum, levelMiddle, levelMaximum, minOutput, maxOutput), textureColor.a);
  }
diff --git a/framework/Source/GPUImageLookupFilter.m b/framework/Source/GPUImageLookupFilter.m
index d9bba913f..23f45b9d6 100644
--- a/framework/Source/GPUImageLookupFilter.m
+++ b/framework/Source/GPUImageLookupFilter.m
@@ -11,15 +11,15 @@
  
  void main()
  {
-     lowp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
+     highp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
      
-     mediump float blueColor = textureColor.b * 63.0;
+     highp float blueColor = textureColor.b * 63.0;
      
-     mediump vec2 quad1;
+     highp vec2 quad1;
      quad1.y = floor(floor(blueColor) / 8.0);
      quad1.x = floor(blueColor) - (quad1.y * 8.0);
      
-     mediump vec2 quad2;
+     highp vec2 quad2;
      quad2.y = floor(ceil(blueColor) / 8.0);
      quad2.x = ceil(blueColor) - (quad2.y * 8.0);