1 files changed, 19 insertions, 0 deletions
diff --git a/src/addons/GifMaker/godot-gdgifexporter/gdgifexporter/lookup_color.shader b/src/addons/GifMaker/godot-gdgifexporter/gdgifexporter/lookup_color.shader
new file mode 100644
index 0000000..8379108
--- /dev/null
+++ b/src/addons/GifMaker/godot-gdgifexporter/gdgifexporter/lookup_color.shader
@@ -0,0 +1,19 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform sampler2D lut;
+
+void fragment() {
+	vec4 color = texture(TEXTURE, UV);
+	float index = 0.0;
+	if (color.a > 0.0) {
+		for (int i = 0; i < 256; i++) {
+			vec4 c = texture(lut, vec2((float(i) + 0.5) / 256.0, 0.5));
+			if (c.rgb == color.rgb) {
+				index = float(i) / 255.0;
+				break;
+			}
+		}
+	}
+	COLOR = vec4(vec3(index), 1.0);
+}
+\ No newline at end of file