[Bf-blender-cvs] [29afadcb15f] master: GPencil: Create new frame when Erase only if additive drawing is enabled
Antonio Vazquez
noreply at git.blender.org
Wed May 20 20:34:08 CEST 2020
Commit: 29afadcb15f71119f70f77bcf32c8e54c7614576
Author: Antonio Vazquez
Date: Wed May 20 20:33:35 2020 +0200
Branches: master
https://developer.blender.org/rB29afadcb15f71119f70f77bcf32c8e54c7614576
GPencil: Create new frame when Erase only if additive drawing is enabled
Differential Revision: https://developer.blender.org/D7804
===================================================================
M source/blender/editors/gpencil/gpencil_paint.c
===================================================================
diff --git a/source/blender/editors/gpencil/gpencil_paint.c b/source/blender/editors/gpencil/gpencil_paint.c
index 309329e4649..4e83c4fb11c 100644
--- a/source/blender/editors/gpencil/gpencil_paint.c
+++ b/source/blender/editors/gpencil/gpencil_paint.c
@@ -2071,8 +2071,15 @@ static void gp_paint_initstroke(tGPsdata *p, eGPencil_PaintModes paintmode, Deps
return;
}
- /* Eraser mode: If no active strokes, just return. */
+ /* Eraser mode: If no active strokes, add one or just return. */
if (paintmode == GP_PAINTMODE_ERASER) {
+ /* Eraser mode:
+ * 1) Add new frames to all frames that we might touch,
+ * 2) Ensure that p->gpf refers to the frame used for the active layer
+ * (to avoid problems with other tools which expect it to exist)
+ *
+ * This is done only if additive drawing is enabled.
+ */
bool has_layer_to_erase = false;
LISTBASE_FOREACH (bGPDlayer *, gpl, &p->gpd->layers) {
@@ -2081,12 +2088,27 @@ static void gp_paint_initstroke(tGPsdata *p, eGPencil_PaintModes paintmode, Deps
continue;
}
+ /* Add a new frame if needed (and based off the active frame,
+ * as we need some existing strokes to erase)
+ *
+ * Note: We don't add a new frame if there's nothing there now, so
+ * -> If there are no frames at all, don't add one
+ * -> If there are no strokes in that frame, don't add a new empty frame
+ */
if (gpl->actframe && gpl->actframe->strokes.first) {
+ if (ts->gpencil_flags & GP_TOOL_FLAG_RETAIN_LAST) {
+ gpl->actframe = BKE_gpencil_layer_frame_get(gpl, CFRA, GP_GETFRAME_ADD_COPY);
+ }
has_layer_to_erase = true;
break;
}
}
+ /* Ensure this gets set. */
+ if (ts->gpencil_flags & GP_TOOL_FLAG_RETAIN_LAST) {
+ p->gpf = p->gpl->actframe;
+ }
+
if (has_layer_to_erase == false) {
p->status = GP_STATUS_ERROR;
return;
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