Add config for radius, using a custom resourcepack

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14-bin.zip

src/main/java/com/tterrag/blur/Blur.java

@@ -7,12 +7,13 @@ import java.util.List;
 import org.apache.commons.lang3.ArrayUtils;
 
 import com.google.common.base.Throwables;
+import com.tterrag.blur.util.ShaderResourcePack;
 
 import static com.tterrag.blur.Blur.*;
-
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiChat;
 import net.minecraft.client.renderer.EntityRenderer;
+import net.minecraft.client.resources.IResourcePack;
 import net.minecraft.client.shader.Shader;
 import net.minecraft.client.shader.ShaderGroup;
 import net.minecraft.client.shader.ShaderUniform;
@@ -48,12 +49,16 @@ public class Blur {
     private long start;
     private int fadeTime;
     
+    public int radius;
     private int colorFirst, colorSecond;
     
     @EventHandler
     public void preInit(FMLPreInitializationEvent event) {
         MinecraftForge.EVENT_BUS.register(this);
         
+        // Add our dummy resourcepack
+        ((List<IResourcePack>)ReflectionHelper.getPrivateValue(Minecraft.class, Minecraft.getMinecraft(), "field_110449_ao", "defaultResourcePacks")).add(new ShaderResourcePack());
+        
         config = new Configuration(new File(event.getModConfigurationDirectory(), "blur.cfg"));
         saveConfig();
     }
@@ -66,6 +71,7 @@ public class Blur {
         
         fadeTime = config.getInt("fadeTime", Configuration.CATEGORY_GENERAL, 200, 0, Integer.MAX_VALUE, "The time it takes for the blur to fade in, in ms.");
         
+        radius = config.getInt("radius", Configuration.CATEGORY_GENERAL, 12, 1, 100, "The radius of the blur effect. This controls how \"strong\" the blur is.");
         colorFirst = Integer.parseUnsignedInt(
                 config.getString("gradientStartColor",  Configuration.CATEGORY_GENERAL, "75000000", "The start color of the background gradient. Given in ARGB hex."),
                 16

src/main/java/com/tterrag/blur/util/ShaderResourcePack.java

@@ -0,0 +1,70 @@
+package com.tterrag.blur.util;
+
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Scanner;
+import java.util.Set;
+
+import net.minecraft.client.resources.IResourcePack;
+import net.minecraft.client.resources.data.IMetadataSection;
+import net.minecraft.client.resources.data.MetadataSerializer;
+import net.minecraft.util.ResourceLocation;
+
+import com.google.common.collect.ImmutableSet;
+import com.tterrag.blur.Blur;
+
+public class ShaderResourcePack implements IResourcePack {
+	
+	protected boolean validPath(ResourceLocation location) {
+		return location.getResourceDomain().equals("minecraft") && location.getResourcePath().startsWith("shaders/");
+	}
+
+	@Override
+	public InputStream getInputStream(ResourceLocation location) throws IOException {
+		if (validPath(location)) {
+			InputStream in = Blur.class.getResourceAsStream("/" + location.getResourcePath());
+			StringBuilder data = new StringBuilder();
+			Scanner scan = new Scanner(in);
+			try {
+				while (scan.hasNextLine()) {
+					data.append(scan.nextLine().replaceAll("@radius@", Integer.toString(Blur.instance.radius))).append('\n');
+				}
+			} finally {
+				scan.close();
+			}
+			
+			return new ByteArrayInputStream(data.toString().getBytes());
+		}
+		return null;
+	}
+
+	@Override
+	public boolean resourceExists(ResourceLocation location) {
+		return validPath(location) && Blur.class.getResource("/" + location.getResourcePath()) != null;
+	}
+
+	@Override
+	public Set<String> getResourceDomains() {
+		return ImmutableSet.of("minecraft");
+	}
+
+	@Override
+	public <T extends IMetadataSection> T getPackMetadata(
+			MetadataSerializer metadataSerializer, String metadataSectionName)
+			throws IOException {
+		return null;
+	}
+
+	@Override
+	public BufferedImage getPackImage() throws IOException {
+		return null;
+	}
+
+	@Override
+	public String getPackName() {
+		return "Blur dummy resource pack";
+	}
+
+}

src/main/resources/shaders/post/fade_in_blur.json

@@ -14,7 +14,7 @@
                 },
                 {
                     "name": "Radius",
-                    "values": [ 20.0 ]
+                    "values": [ @radius@.0 ]
                 }
             ]
         },
@@ -29,7 +29,7 @@
                 },
                 {
                     "name": "Radius",
-                    "values": [ 20.0 ]
+                    "values": [ @radius@.0 ]
                 }
             ]
         },
@@ -44,7 +44,7 @@
                 },
                 {
                     "name": "Radius",
-                    "values": [ 20.0 ]
+                    "values": [ @radius@.0 ]
                 }
             ]
         },
@@ -59,7 +59,7 @@
                 },
                 {
                     "name": "Radius",
-                    "values": [ 20.0 ]
+                    "values": [ @radius@.0 ]
                 }
             ]
         }