1 files changed, 24 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_effect_outline_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_effect_outline_frag.glsl
new file mode 100644
index 00000000000..fb6fdb93462
--- /dev/null
+++ b/source/blender/draw/engines/workbench/shaders/workbench_effect_outline_frag.glsl
@@ -0,0 +1,24 @@
+
+#pragma BLENDER_REQUIRE(workbench_data_lib.glsl)
+
+uniform usampler2D objectIdBuffer;
+
+in vec4 uvcoordsvar;
+
+out vec4 fragColor;
+
+void main()
+{
+  vec3 offset = vec3(world_data.viewport_size_inv, 0.0) * world_data.ui_scale;
+  vec2 uv = uvcoordsvar.st;
+
+  uint center_id = texture(objectIdBuffer, uv).r;
+  uvec4 adjacent_ids = uvec4(texture(objectIdBuffer, uv + offset.zy).r,
+                             texture(objectIdBuffer, uv - offset.zy).r,
+                             texture(objectIdBuffer, uv + offset.xz).r,
+                             texture(objectIdBuffer, uv - offset.xz).r);
+
+  float outline_opacity = 1.0 - dot(vec4(equal(uvec4(center_id), adjacent_ids)), vec4(0.25));
+
+  fragColor = world_data.object_outline_color * outline_opacity;
+}