python api: add functionality to remove vertex color layers.

note: that this intentionally removes check to exit vpaint mode when a vertex color layer is removed,
	  since being in vertex-paint mode without a vertex color layer is supported.

also minor change to drawing camera limits while picking from previous commit.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/customdata.c b/source/blender/blenkernel/intern/customdata.c
index 1cefd65bbc5..1f9c067e4a6 100644
--- a/source/blender/blenkernel/intern/customdata.c
+++ b/source/blender/blenkernel/intern/customdata.c
@@ -1458,6 +1458,14 @@ int CustomData_get_stencil_layer_index(const CustomData *data, int type)
 /* -------------------------------------------------------------------- */
 /* index values per layer type */
 
+int CustomData_get_named_layer(const struct CustomData *data, int type, const char *name)
+{
+	const int named_index = CustomData_get_named_layer_index(data, type, name);
+	const int layer_index = data->typemap[type];
+	BLI_assert(customdata_typemap_is_valid(data));
+	return (named_index != -1) ? named_index - layer_index : -1;
+}
+
 int CustomData_get_active_layer(const CustomData *data, int type)
 {
 	const int layer_index = data->typemap[type];