Fix T62917 UV editor: Edge overlay not shown when edge overlay type is Dash

Fix by changing the shader to always compute dash for uv and just change
dash size to something really big for other overlay types.

1 files changed, 30 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_2D_edituvs_edges_frag.glsl b/source/blender/gpu/shaders/gpu_shader_2D_edituvs_edges_frag.glsl
new file mode 100644
index 00000000000..108fc85c4a5
--- /dev/null
+++ b/source/blender/gpu/shaders/gpu_shader_2D_edituvs_edges_frag.glsl
@@ -0,0 +1,30 @@
+
+
+uniform float dashWidth;
+
+#ifdef SMOOTH_COLOR
+noperspective in vec4 finalColor;
+#else
+flat in vec4 finalColor;
+#endif
+
+noperspective in vec2 stipple_pos;
+flat in vec2 stipple_start;
+
+out vec4 fragColor;
+
+void main()
+{
+  fragColor = finalColor;
+
+  /* Avoid passing viewport size */
+  vec2 dd = fwidth(stipple_pos);
+
+  float dist = distance(stipple_start, stipple_pos) / max(dd.x, dd.y);
+
+  if (fract(dist / dashWidth) > 0.5) {
+    fragColor.rgb = vec3(0.0);
+  }
+
+  fragColor = blender_srgb_to_framebuffer_space(fragColor);
+}