1 files changed, 12 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_object_outline_lib.glsl b/source/blender/draw/engines/workbench/shaders/workbench_object_outline_lib.glsl
new file mode 100644
index 00000000000..3e925ba023f
--- /dev/null
+++ b/source/blender/draw/engines/workbench/shaders/workbench_object_outline_lib.glsl
@@ -0,0 +1,12 @@
+#define OBJECT_OUTLINE_OFFSET 1
+
+float calculate_object_outline(usampler2D objectId, ivec2 texel, uint object_id)
+{
+	uvec4 oid_offset = uvec4(
+	    texelFetchOffset(objectId, texel, 0, ivec2(0,  OBJECT_OUTLINE_OFFSET)).r,
+	    texelFetchOffset(objectId, texel, 0, ivec2(0, -OBJECT_OUTLINE_OFFSET)).r,
+	    texelFetchOffset(objectId, texel, 0, ivec2(-OBJECT_OUTLINE_OFFSET, 0)).r,
+	    texelFetchOffset(objectId, texel, 0, ivec2( OBJECT_OUTLINE_OFFSET, 0)).r);
+
+	return dot(vec4(equal(uvec4(object_id), oid_offset)), vec4(0.25));
+}