Create/Update assets for version 19w14b

assets/minecraft/shaders/program/bits.fsh

@@ -7,16 +7,21 @@ varying vec2 oneTexel;
 
 uniform vec2 InSize;
 
-uniform float ColorResolution = 8.0;
-uniform float Saturation = 1.2;
+uniform float Resolution = 4.0;
+uniform float Saturation = 1.5;
+uniform float MosaicSize = 8.0;
 
 void main() {
-    vec2 scaleFactors = InSize / 2;
-    vec2 truncPos = floor(texCoord * scaleFactors) / scaleFactors;
-    vec4 baseTexel = texture2D(DiffuseSampler, truncPos);
-    vec3 truncTexel = floor(baseTexel.rgb * ColorResolution) / ColorResolution;
+    vec2 mosaicInSize = InSize / MosaicSize;
+    vec2 fractPix = fract(texCoord * mosaicInSize) / mosaicInSize;
 
-    float luma = dot(truncTexel, vec3(0.3, 0.59, 0.11));
-    vec3 chroma = (truncTexel - luma) * Saturation;
-    gl_FragColor = vec4(luma + chroma, 1.0);
+    vec4 baseTexel = texture2D(DiffuseSampler, texCoord - fractPix);
+
+    vec3 fractTexel = baseTexel.rgb - fract(baseTexel.rgb * Resolution) / Resolution;
+    float luma = dot(fractTexel, vec3(0.3, 0.59, 0.11));
+    vec3 chroma = (fractTexel - luma) * Saturation;
+    baseTexel.rgb = luma + chroma;
+    baseTexel.a = 1.0;
+
+    gl_FragColor = baseTexel;
 }