Desenfoque

shader_type canvas_item;

uniform float radius = 0.0;

void fragment() {
	vec4 col = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0);
	vec2 ps = TEXTURE_PIXEL_SIZE;

	col += textureLod(SCREEN_TEXTURE, SCREEN_UV + vec2(-radius, -radius) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE, SCREEN_UV + vec2(0.0, -radius) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE, SCREEN_UV + vec2(radius, -radius) * ps, 0.0);

	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(-radius, 0.0) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(0.0, 0.0) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(radius, 0.0) * ps, 0.0);

	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(-radius, radius) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(0.0, radius) * ps, 0.0);
	col += textureLod(SCREEN_TEXTURE,SCREEN_UV + vec2(radius, radius) * ps, 0.0);

	col /= 9.0;

	COLOR = col;
}