LineArt: Cached calculation for modifiers in the same stack.

This allows line art to run only once for each modifier stacks,
with an option to toggle a specific line art modifier should
use cache or re-do their own calculations.

Reviewed By: Sebastian Parborg (zeddb), Hans Goudey (HooglyBoogly)

Differential Revision: https://developer.blender.org/D11291

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/gpencil_modifiers/MOD_gpencil_lineart.h b/source/blender/gpencil_modifiers/MOD_gpencil_lineart.h
index 685f0cb36cb..7d75ed5804e 100644
--- a/source/blender/gpencil_modifiers/MOD_gpencil_lineart.h
+++ b/source/blender/gpencil_modifiers/MOD_gpencil_lineart.h
@@ -29,3 +29,7 @@ void OBJECT_OT_lineart_clear(struct wmOperatorType *ot);
 void OBJECT_OT_lineart_clear_all(struct wmOperatorType *ot);
 
 void WM_operatortypes_lineart(void);
+
+struct LineartCache;
+
+void MOD_lineart_clear_cache(struct LineartCache **lc);