Create/Update assets for version 1.7.7

assets/minecraft/shaders/program/blur.fsh

@@ -0,0 +1,23 @@
+#version 120
+
+uniform sampler2D DiffuseSampler;
+
+varying vec2 texCoord;
+varying vec2 oneTexel;
+
+uniform vec2 InSize;
+
+uniform vec2 BlurDir;
+uniform float Radius;
+
+void main() {
+    vec4 blurred = vec4(0.0);
+    float totalStrength = 0.0;
+    for(float r = -Radius; r <= Radius; r += 1.0) {
+        float strength = abs(1.0 - r / Radius);
+        strength = strength * strength;
+        totalStrength = totalStrength + strength;
+        blurred = blurred + texture2D(DiffuseSampler, texCoord + oneTexel * r * BlurDir) * strength;
+    }
+    gl_FragColor = vec4(blurred.rgb / totalStrength, texture2D(DiffuseSampler, texCoord).a);
+}