chromatic_aberration.shader + shake

chromatic_aberration.shader

// chromatic_aberration.shader
// based on code from https://gist.github.com/uheartbeast/312a7ea761b8712c448b31c30c0d8f1f
shader_type canvas_item;

uniform bool apply = true;
uniform float amount = 1.0;
uniform float strength : hint_range(0.0, 2.0) = 1.0;

uniform sampler2D offset_texture : hint_white;

void fragment() {
	vec4 texture_color = texture(SCREEN_TEXTURE, SCREEN_UV);
	vec4 color = texture_color;
	vec4 new_color;
	
	if (apply == true) {
		float adjusted_amount = amount / 100.0;
		new_color.r = texture(SCREEN_TEXTURE, vec2(SCREEN_UV.x - adjusted_amount, SCREEN_UV.y)).r;
		new_color.g = texture(SCREEN_TEXTURE, SCREEN_UV).g;
		new_color.b = texture(SCREEN_TEXTURE, vec2(SCREEN_UV.x + adjusted_amount, SCREEN_UV.y)).b;
	}
	COLOR = mix(color, new_color, strength);
}