[Bf-blender-cvs] [a5b6d6de0a2] blender-v2.90-release: Fix T80885: Texture paint camera project crashes after undo/redo
Campbell Barton
noreply at git.blender.org
Mon Sep 21 09:50:37 CEST 2020
Commit: a5b6d6de0a2b3cec82cd914d58d0c435dace55b0
Author: Campbell Barton
Date: Fri Sep 18 14:17:17 2020 +1000
Branches: blender-v2.90-release
https://developer.blender.org/rBa5b6d6de0a2b3cec82cd914d58d0c435dace55b0
Fix T80885: Texture paint camera project crashes after undo/redo
Unmatched ED_image_undo_push_{begin/end},
add doc-strings noting why this is needed.
Thanks to @Baardaap for the initial fix.
===================================================================
M source/blender/editors/sculpt_paint/paint_image_proj.c
M source/blender/editors/space_image/image_undo.c
===================================================================
diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 5af3a3f4241..cc60d73eef0 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -6114,8 +6114,6 @@ static int texture_paint_camera_project_exec(bContext *C, wmOperator *op)
scene->toolsettings->imapaint.flag |= IMAGEPAINT_DRAWING;
- ED_image_undo_push_begin(op->type->name, PAINT_MODE_TEXTURE_3D);
-
/* allocate and initialize spatial data structures */
project_paint_begin(C, &ps, false, 0);
@@ -6125,8 +6123,10 @@ static int texture_paint_camera_project_exec(bContext *C, wmOperator *op)
return OPERATOR_CANCELLED;
}
- float pos[2] = {0.0, 0.0};
- float lastpos[2] = {0.0, 0.0};
+ ED_image_undo_push_begin(op->type->name, PAINT_MODE_TEXTURE_3D);
+
+ const float pos[2] = {0.0, 0.0};
+ const float lastpos[2] = {0.0, 0.0};
int a;
project_paint_op(&ps, lastpos, pos);
@@ -6140,6 +6140,8 @@ static int texture_paint_camera_project_exec(bContext *C, wmOperator *op)
project_paint_end(&ps);
+ ED_image_undo_push_end();
+
scene->toolsettings->imapaint.flag &= ~IMAGEPAINT_DRAWING;
BKE_brush_size_set(scene, ps.brush, orig_brush_size);
diff --git a/source/blender/editors/space_image/image_undo.c b/source/blender/editors/space_image/image_undo.c
index e0c44c3a0ba..ce4e9195723 100644
--- a/source/blender/editors/space_image/image_undo.c
+++ b/source/blender/editors/space_image/image_undo.c
@@ -1005,6 +1005,14 @@ void ED_image_undosys_type(UndoType *ut)
/* -------------------------------------------------------------------- */
/** \name Utilities
+ *
+ * \note image undo exposes #ED_image_undo_push_begin, #ED_image_undo_push_end
+ * which must be called by the operator directly.
+ *
+ * Unlike most other undo stacks this is needed:
+ * - So we can always access the state before the image was painted onto,
+ * which is needed if previous undo states aren't image-type.
+ * - So operators can access the pixel-data before the stroke was applied, at run-time.
* \{ */
ListBase *ED_image_paint_tile_list_get(void)
@@ -1042,6 +1050,10 @@ static ImageUndoStep *image_undo_push_begin(const char *name, int paint_mode)
return us;
}
+/**
+ * The caller is responsible for running #ED_image_undo_push_end,
+ * failure to do so causes an invalid state for the undo system.
+ */
void ED_image_undo_push_begin(const char *name, int paint_mode)
{
image_undo_push_begin(name, paint_mode);
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