commenting frag shader

game/assets/shaders/pixelart.fs

@@ -1,23 +1,21 @@
 #version 330
 
-// Input vertex attributes (from vertex shader)
+// Fragment texture UV coordinate
 in vec2 fragTexCoord;
-in vec4 fragColor;
 
-// Input uniform values
+// Whole input texture
 uniform sampler2D texture0;
-uniform vec4 colDiffuse;
+
+// Viewport size
 uniform vec2 viewport;
 
 // Output fragment color
 out vec4 finalColor;
 
-// Pixel scaling
+// Pixel scaling factor (pixels per pixel)
 const vec2 pixelScale = vec2(1.0, 1.0);
 
-void main()
-{
-
+void main() {
   // Calculate the distance to merge pixels
   float dx = pixelScale.x * (1.0 / viewport.x);
   float dy = pixelScale.y * (1.0 / viewport.y);