Workbench: Specular Highlights

Added specular highlights for:
 - Solid studio shading
 - Texture studio shading

1 files changed, 16 insertions, 0 deletions

diff --git a/source/blender/draw/engines/workbench/shaders/workbench_world_light_lib.glsl b/source/blender/draw/engines/workbench/shaders/workbench_world_light_lib.glsl
index 6507f1ec707..7e476080b64 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_world_light_lib.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_world_light_lib.glsl
@@ -18,3 +18,19 @@ vec3 get_camera_diffuse_light(WorldData world_data, vec3 N)
 	result = mix(result, world_data.diffuse_light_y_neg, clamp(-N.z, 0.0, 1.0));
 	return result.xyz;
 }
+
+/* N And I are in View Space. */
+vec3 get_world_specular_light(WorldData world_data, vec3 N, vec3 I)
+{
+#ifdef V3D_SHADING_SPECULAR_HIGHLIGHTS
+	vec3 reflection_vector = reflect(I, N);
+	vec3 specular_light = vec3(1.0);
+	/* Simple frontal specular highlights. */
+	float specular_influence = pow(max(0.0, dot(world_data.light_direction_vs.xyz, reflection_vector)), world_data.specular_sharpness);
+	vec3 specular_color = specular_light * specular_influence;
+
+#else /* V3D_SHADING_SPECULAR_HIGHLIGHTS */
+	vec3 specular_color = vec3(0.0);
+#endif /* V3D_SHADING_SPECULAR_HIGHLIGHTS */
+	return specular_color;
+}