ok

minecraft/shaders/program/menu_blur.fsh

@@ -0,0 +1,29 @@
+#version 120
+
+uniform sampler2D DiffuseSampler;
+
+varying vec2 texCoord;
+varying vec2 oneTexel;
+
+uniform vec2 InSize;
+
+uniform vec2 BlurDir;
+uniform float Radius;
+uniform float Progress;
+
+void main() {
+    vec4 blurred = vec4(0.0);
+    float totalStrength = 0.0;
+    float totalAlpha = 0.0;
+    float totalSamples = 0.0;
+    float progRadius = floor(Radius * Progress);
+    for (float r = -progRadius; r <= progRadius; r += 1.0) {
+        vec4 texel = texture2D(DiffuseSampler, texCoord + oneTexel * r * BlurDir);
+        totalAlpha = totalAlpha + texel.a;
+        totalSamples = totalSamples + 1.0;
+        float strength = 1.0 - abs(r / progRadius);
+        totalStrength = totalStrength + strength;
+        blurred = blurred + texel;
+    }
+    gl_FragColor = vec4(blurred.rgb / (progRadius * 2.0 + 1.0), totalAlpha);
+}