1 files changed, 26 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_distance_matte.glsl b/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_distance_matte.glsl
new file mode 100644
index 00000000000..9beed66826c
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_distance_matte.glsl
@@ -0,0 +1,26 @@
+#pragma BLENDER_REQUIRE(gpu_shader_common_color_utils.glsl)
+
+void node_composite_distance_matte_rgba(
+    vec4 color, vec4 key, float tolerance, float falloff, out vec4 result, out float matte)
+{
+  float difference = distance(color.rgb, key.rgb);
+  bool is_opaque = difference > tolerance + falloff;
+  float alpha = is_opaque ? color.a : max(0.0, difference - tolerance) / falloff;
+  matte = min(alpha, color.a);
+  result = color * matte;
+}
+
+void node_composite_distance_matte_ycca(
+    vec4 color, vec4 key, float tolerance, float falloff, out vec4 result, out float matte)
+{
+  vec4 color_ycca;
+  rgba_to_ycca_itu_709(color, color_ycca);
+  vec4 key_ycca;
+  rgba_to_ycca_itu_709(key, key_ycca);
+
+  float difference = distance(color_ycca.yz, key_ycca.yz);
+  bool is_opaque = difference > tolerance + falloff;
+  float alpha = is_opaque ? color.a : max(0.0, difference - tolerance) / falloff;
+  matte = min(alpha, color.a);
+  result = color * matte;
+}