Gameboy Color Palette Shader
Works with Godot 4.3
Simply put a ColorRect on a camera or anywhere really and it’ll effect that specific area.
Shader code
shader_type canvas_item;
uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
uniform vec3 pallette_white : source_color = vec3(0.988235294, 0.980392157, 0.988235294);
uniform vec3 pallette_light_grey : source_color = vec3(0.674509804, 0.149019608, 0.141176471);
uniform vec3 pallette_dark_grey : source_color = vec3(0.925490196, 0.541176471, 0.549019608);
uniform vec3 pallette_black : source_color = vec3(0.015686275, 0.094117647, 0.015686275);
vec3 tex2D(sampler2D _tex,vec2 _p)
{
vec3 col=texture(_tex,_p).xyz;
if(.5<abs(_p.x-.5)){
col=vec3(.1);
}
return col;
}
void fragment() {
vec2 percent = (SCREEN_UV.xy);
vec3 pixelColor = tex2D(SCREEN_TEXTURE, percent).xyz;
float a = texture(SCREEN_TEXTURE, percent).a;
float pixelGrey = dot(pixelColor, vec3(1.0/3.0));
if(pixelGrey > 0.75){
pixelColor = pallette_white;
}else if(pixelGrey > 0.5){
pixelColor = pallette_light_grey;
}else if(pixelGrey > 0.25){
pixelColor = pallette_dark_grey;
}else if(pixelGrey > 0.0){
pixelColor = pallette_black;
}
COLOR = vec4(pixelColor, a);
}
