<postprocess>, fix tab open/close, fix some URL bugs

flumi/Shaders/chrome.gdshader

@@ -0,0 +1,29 @@
+// Chromatic Aberration Shader by https://godotshaders.com/shader/chromatic-abberation/
+// All credits to the original author!!!
+
+shader_type canvas_item;
+
+uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
+
+uniform int levels = 3;
+uniform float spread = 0.01;
+
+vec3 chromatic_slice(float t){
+	vec3 res = vec3(1.0-t, 1.0 - abs(t - 1.0), t - 1.0);
+	return max(res, 0.0);
+}
+
+void fragment(){
+	vec3 sum;
+	COLOR.rgb = vec3(0);
+	vec2 offset = (UV - vec2(0.5))*vec2(1,-1);
+	for(int i = 0; i < levels; i++){
+		float t = 2.0*float(i)/float(levels-1); // range 0.0->2.0
+		vec3 slice = vec3(1.0-t, 1.0 - abs(t - 1.0), t - 1.0);
+		slice = max(slice, 0.0);
+		sum += slice;
+		vec2 slice_offset = (t-1.0)*spread*offset;
+		COLOR.rgb += slice * texture(SCREEN_TEXTURE, SCREEN_UV + slice_offset).rgb;
+	}
+	COLOR.rgb /= sum;
+}