Overlay: Wireframe: Fix Edges not being culled correctly

1 files changed, 12 insertions, 1 deletions

diff --git a/source/blender/draw/engines/overlay/shaders/wireframe_frag.glsl b/source/blender/draw/engines/overlay/shaders/wireframe_frag.glsl
index 0c6a3a651b9..edfe720da0c 100644
--- a/source/blender/draw/engines/overlay/shaders/wireframe_frag.glsl
+++ b/source/blender/draw/engines/overlay/shaders/wireframe_frag.glsl
@@ -1,14 +1,25 @@
 
-in vec3 finalColor;
 flat in vec2 edgeStart;
+
+#ifndef SELECT_EDGES
+in vec3 finalColor;
 noperspective in vec2 edgePos;
 
 layout(location = 0) out vec4 fragColor;
 layout(location = 1) out vec4 lineOutput;
+#endif
 
 void main()
 {
+  /* Needed only because of wireframe slider.
+   * If we could get rid of it would be nice because of performance drain of discard. */
+  if (edgeStart.r == -1.0) {
+    discard;
+  }
+
+#ifndef SELECT_EDGES
   lineOutput = pack_line_data(gl_FragCoord.xy, edgeStart, edgePos);
   fragColor.rgb = finalColor;
   fragColor.a = 1.0;
+#endif
 }