Paint: Fix Image Editor Cursor Disappearing (T90120)

This patch fixes T90120.  The fundamental problem is that 2d and the old 3d paint modes share a single Paint struct, ToolSettings->imapaint.  This patch is a temporary fix until the new 3d paint mode (which has its own Paint struct) is released.

The patch works by listening for `NC_SCENE|ND_MODE` inside `image_listener` in `space_image.c`.   It does not use `ED_space_image_paint_update` since that requires a `bMain.`  Instead it calls `paint_cursor_start` (which is promoted to `ED_paint_cursor_start`).  `image_paint_poll` is also promoted to an `ED_` function.

Reviewed By: Campbell Barton
Differential Revision: https://developer.blender.org/D14946
Ref D14946

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
index dc3dacf9c81..f5f7726a7f8 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
@@ -17,6 +17,7 @@
 #include "WM_api.h"
 #include "WM_toolsystem.h"
 
+#include "ED_image.h"
 #include "ED_curves_sculpt.h"
 #include "ED_object.h"
 #include "ED_screen.h"
@@ -271,7 +272,7 @@ static void curves_sculptmode_enter(bContext *C)
 
   ob->mode = OB_MODE_SCULPT_CURVES;
 
-  paint_cursor_start(&curves_sculpt->paint, CURVES_SCULPT_mode_poll_view3d);
+  ED_paint_cursor_start(&curves_sculpt->paint, CURVES_SCULPT_mode_poll_view3d);
 
   /* Update for mode change. */
   DEG_id_tag_update(&ob->id, ID_RECALC_COPY_ON_WRITE);