Fix T72621: Transform object origin support for grease-pencil

Added support for transforming only origins with greasepencil objects.

The new functions is based on BKE_gpencil_transform. That is why there is FIXME statements in there.

Reviewed By: Campbell, Antonio

Differential Revision: http://developer.blender.org/D8303

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_gpencil_geom.h b/source/blender/blenkernel/BKE_gpencil_geom.h
index 6b0f9428f82..1b22931483c 100644
--- a/source/blender/blenkernel/BKE_gpencil_geom.h
+++ b/source/blender/blenkernel/BKE_gpencil_geom.h
@@ -78,6 +78,20 @@ void BKE_gpencil_stroke_uv_update(struct bGPDstroke *gps);
 
 void BKE_gpencil_transform(struct bGPdata *gpd, float mat[4][4]);
 
+typedef struct GPencilPointCoordinates {
+  /* This is used when doing "move only origin" in object_data_transform.c.
+   * pressure is needs to be stored here as it is tied to object scale. */
+  float co[3];
+  float pressure;
+} GPencilPointCoordinates;
+
+int BKE_gpencil_stroke_point_count(struct bGPdata *gpd);
+void BKE_gpencil_point_coords_get(struct bGPdata *gpd, GPencilPointCoordinates *elem_data);
+void BKE_gpencil_point_coords_apply(struct bGPdata *gpd, const GPencilPointCoordinates *elem_data);
+void BKE_gpencil_point_coords_apply_with_mat4(struct bGPdata *gpd,
+                                              const GPencilPointCoordinates *elem_data,
+                                              const float mat[4][4]);
+
 bool BKE_gpencil_stroke_sample(struct bGPDstroke *gps, const float dist, const bool select);
 bool BKE_gpencil_stroke_smooth(struct bGPDstroke *gps, int i, float inf);
 bool BKE_gpencil_stroke_smooth_strength(struct bGPDstroke *gps, int point_index, float influence);