TV Static shader

shader-test/source/MenuState.kiss

@@ -19,6 +19,7 @@
                 CheckerBoardState
                 InvertState
                 MirroredOrnamentState
-                ShadowState)
+                ShadowState
+                TVStaticState)
             
             ->choice (FlxG.switchState (Type.createInstance choice [])))))

shader-test/source/TVStaticState.kiss

@@ -0,0 +1,22 @@
+(import flixel.FlxState)
+(import flixel.FlxG)
+(import flixel.FlxSprite)
+(import flixel.util.FlxColor)
+(import flixel.math.FlxPoint)
+(import flixel.FlxCamera)
+(import openfl.filters.BitmapFilter)
+(import openfl.filters.ShaderFilter)
+(import flixel.system.FlxAssets.FlxShader)
+
+(extends FlxState)
+
+(prop &mut shader null)
+
+(method &override :Void create []
+    (super.create)
+    
+    (set shader (new kiss_flixel.shaders.TVStatic))
+    (kiss_flixel.CameraTools.addShaderFilter FlxG.camera (array FlxShader shader)))
+
+(method &override :Void update [:Float elapsed]
+    (super.update elapsed))

src/kiss_flixel/shaders/TVStatic.frag

@@ -0,0 +1,13 @@
+// Based on https://www.youtube.com/watch?v=x_s0LmQgjfU
+// by June Rain
+// Ported to kiss-flixel by NQNStudios
+
+uniform float amount = 40.0;
+uniform vec3 color = vec3(1.0);
+
+void fragment() {
+	float a = fract(sin(dot(UV, vec2(12.9898, 78.233) * TIME)) * 438.5453) * 1.9;
+	vec4 col = vec4(color, 1.0);
+	col.a *= pow(a, amount);
+	COLOR = col;
+}