Fix T89849: Time offset not working with Bake Object transform to Grease pencil

The bake animation was not using the remap of time done by grease pencil time modifier.

3 files changed, 20 insertions, 5 deletions

diff --git a/source/blender/blenkernel/BKE_gpencil_modifier.h b/source/blender/blenkernel/BKE_gpencil_modifier.h
index 8fbc2112c77..33524e47473 100644
--- a/source/blender/blenkernel/BKE_gpencil_modifier.h
+++ b/source/blender/blenkernel/BKE_gpencil_modifier.h
@@ -325,6 +325,12 @@ struct bGPDframe *BKE_gpencil_frame_retime_get(struct Depsgraph *depsgraph,
                                                struct Scene *scene,
                                                struct Object *ob,
                                                struct bGPDlayer *gpl);
+int BKE_gpencil_time_modifier_cfra(struct Depsgraph *depsgraph,
+                                   struct Scene *scene,
+                                   struct Object *ob,
+                                   struct bGPDlayer *gpl,
+                                   const int cfra,
+                                   const bool is_render);
 
 void BKE_gpencil_modifier_blend_write(struct BlendWriter *writer, struct ListBase *modbase);
 void BKE_gpencil_modifier_blend_read_data(struct BlendDataReader *reader, struct ListBase *lb);
diff --git a/source/blender/blenkernel/intern/gpencil_modifier.c b/source/blender/blenkernel/intern/gpencil_modifier.c
index 4d9c9878a67..0e2219e6c7f 100644
--- a/source/blender/blenkernel/intern/gpencil_modifier.c
+++ b/source/blender/blenkernel/intern/gpencil_modifier.c
@@ -257,9 +257,13 @@ bool BKE_gpencil_is_first_lineart_in_stack(const Object *ob, const GpencilModifi
   return false;
 }
 
-/* apply time modifiers */
-static int gpencil_time_modifier(
-    Depsgraph *depsgraph, Scene *scene, Object *ob, bGPDlayer *gpl, int cfra, bool is_render)
+/* Get Time modifier frame number. */
+int BKE_gpencil_time_modifier_cfra(Depsgraph *depsgraph,
+                                   Scene *scene,
+                                   Object *ob,
+                                   bGPDlayer *gpl,
+                                   const int cfra,
+                                   const bool is_render)
 {
   bGPdata *gpd = ob->data;
   const bool is_edit = GPENCIL_ANY_EDIT_MODE(gpd);
@@ -665,7 +669,7 @@ static int gpencil_remap_time_get(Depsgraph *depsgraph, Scene *scene, Object *ob
 
   int remap_cfra = cfra_eval;
   if (time_remap) {
-    remap_cfra = gpencil_time_modifier(depsgraph, scene, ob, gpl, cfra_eval, is_render);
+    remap_cfra = BKE_gpencil_time_modifier_cfra(depsgraph, scene, ob, gpl, cfra_eval, is_render);
   }
 
   return remap_cfra;
diff --git a/source/blender/editors/gpencil/gpencil_bake_animation.c b/source/blender/editors/gpencil/gpencil_bake_animation.c
index 1a5e2950e09..2d299230124 100644
--- a/source/blender/editors/gpencil/gpencil_bake_animation.c
+++ b/source/blender/editors/gpencil/gpencil_bake_animation.c
@@ -38,6 +38,7 @@
 #include "BKE_duplilist.h"
 #include "BKE_gpencil.h"
 #include "BKE_gpencil_geom.h"
+#include "BKE_gpencil_modifier.h"
 #include "BKE_layer.h"
 #include "BKE_main.h"
 #include "BKE_material.h"
@@ -303,8 +304,12 @@ static int gpencil_bake_grease_pencil_animation_exec(bContext *C, wmOperator *op
         float matrix[4][4];
         BKE_gpencil_layer_transform_matrix_get(depsgraph, elem->ob, gpl_src, matrix);
 
+        /* Apply time modifier. */
+        int remap_cfra = BKE_gpencil_time_modifier_cfra(
+            depsgraph, scene, elem->ob, gpl_src, CFRA, false);
         /* Duplicate frame. */
-        bGPDframe *gpf_src = BKE_gpencil_layer_frame_get(gpl_src, CFRA, GP_GETFRAME_USE_PREV);
+        bGPDframe *gpf_src = BKE_gpencil_layer_frame_get(
+            gpl_src, remap_cfra, GP_GETFRAME_USE_PREV);
         if (gpf_src == NULL) {
           continue;
         }