Fix T65691: GPencil Drawing long strokes turn invisible

There was a fixed limit to the number of points available in a buffer stroke.

Now, the array is expanded as needed using a predefined number of points for each expansion, instead to add one by one. This is done to reduce the number of times the memory allocation is required.

As part of the fix, some variables have been renamed to reflect better their use.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_gpencil.h b/source/blender/editors/include/ED_gpencil.h
index 0e3204b30c7..6410e6630a7 100644
--- a/source/blender/editors/include/ED_gpencil.h
+++ b/source/blender/editors/include/ED_gpencil.h
@@ -35,6 +35,7 @@ struct bGPDlayer;
 struct bGPDspoint;
 struct bGPDstroke;
 struct bGPdata;
+struct tGPspoint;
 
 struct ARegion;
 struct Depsgraph;
@@ -287,4 +288,9 @@ int ED_gpencil_select_stroke_segment(struct bGPDlayer *gpl,
 
 void ED_gpencil_select_toggle_all(struct bContext *C, int action);
 
+/* Ensure stroke sbuffer size is enough */
+struct tGPspoint *ED_gpencil_sbuffer_ensure(struct tGPspoint *buffer_array,
+                                            short *buffer_size,
+                                            short *buffer_used,
+                                            const bool clear);
 #endif /*  __ED_GPENCIL_H__ */