the

pixel_art.gdshader

@@ -0,0 +1,14 @@
+shader_type canvas_item;
+render_mode skip_vertex_transform, unshaded;
+
+const vec2 target_resolution = vec2(320.0, 180.0);
+const float colors_per_channel = 16.0;
+
+uniform sampler2D screen_texture: hint_screen_texture, filter_nearest;
+
+void fragment() {
+	vec2 uv = floor(SCREEN_UV * target_resolution) / target_resolution;
+	vec3 color = texture(screen_texture, uv).rgb;
+	vec3 quantized_color = floor(color * colors_per_channel) / colors_per_channel;
+	COLOR = vec4(quantized_color, 1.0);
+}