Manipulator: add sun-beam node manipulator

source/blender/editors/manipulator_library/manipulator_types/cage2d_manipulator.c

@@ -662,11 +662,11 @@ static void MANIPULATOR_WT_cage_2d(wmManipulatorType *wt)
 	/* api callbacks */
 	wt->draw = manipulator_rect_transform_draw;
 	wt->draw_select = manipulator_rect_transform_draw_select;
+	wt->test_select = manipulator_rect_transform_test_select;
 	wt->setup = manipulator_rect_transform_setup;
 	wt->invoke = manipulator_rect_transform_invoke;
 	wt->property_update = manipulator_rect_transform_property_update;
 	wt->modal = manipulator_rect_transform_modal;
-	wt->test_select = manipulator_rect_transform_test_select;
 	wt->exit = manipulator_rect_transform_exit;
 	wt->cursor_get = manipulator_rect_transform_get_cursor;
 

source/blender/editors/space_node/node_intern.h

@@ -222,6 +222,7 @@ void NODE_OT_clear_viewer_border(struct wmOperatorType *ot);
 /* node_widgets.c */
 void NODE_WGT_backdrop_transform(struct wmManipulatorGroupType *wgt);
 void NODE_WGT_backdrop_crop(struct wmManipulatorGroupType *wgt);
+void NODE_WGT_backdrop_sun_beams(struct wmManipulatorGroupType *wgt);
 
 
 extern const char *node_context_dir[];

source/blender/editors/space_node/node_manipulators.c

@@ -373,3 +373,109 @@ void NODE_WGT_backdrop_crop(wmManipulatorGroupType *wgt)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+
+/** \name Sun Beams
+ * \{ */
+
+struct NodeSunBeamsWidgetGroup {
+	wmManipulator *manipulator;
+
+	struct {
+		float dims[2];
+	} state;
+};
+
+static bool WIDGETGROUP_node_sbeam_poll(const bContext *C, wmManipulatorGroupType *UNUSED(wgt))
+{
+	SpaceNode *snode = CTX_wm_space_node(C);
+
+	if ((snode->flag & SNODE_BACKDRAW) == 0) {
+		return false;
+	}
+
+	if (snode && snode->edittree && snode->edittree->type == NTREE_COMPOSIT) {
+		bNode *node = nodeGetActive(snode->edittree);
+
+		if (node && ELEM(node->type, CMP_NODE_SUNBEAMS)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+static void WIDGETGROUP_node_sbeam_setup(const bContext *UNUSED(C), wmManipulatorGroup *mgroup)
+{
+	struct NodeSunBeamsWidgetGroup *sbeam_group = MEM_mallocN(sizeof(struct NodeSunBeamsWidgetGroup), __func__);
+
+	sbeam_group->manipulator = WM_manipulator_new("MANIPULATOR_WT_grab_3d", mgroup, NULL);
+	wmManipulator *mpr = sbeam_group->manipulator;
+
+	RNA_enum_set(mpr->ptr, "draw_style",  ED_MANIPULATOR_GRAB_STYLE_CROSS);
+
+	mpr->scale_basis = 0.05f;
+
+	mgroup->customdata = sbeam_group;
+}
+
+static void WIDGETGROUP_node_sbeam_draw_prepare(const bContext *C, wmManipulatorGroup *mgroup)
+{
+	struct NodeSunBeamsWidgetGroup *sbeam_group = mgroup->customdata;
+	ARegion *ar = CTX_wm_region(C);
+	wmManipulator *mpr = mgroup->manipulators.first;
+
+	SpaceNode *snode = CTX_wm_space_node(C);
+
+	unit_m4(mpr->matrix_space);
+	mul_v3_fl(mpr->matrix_space[0], snode->zoom * sbeam_group->state.dims[0]);
+	mul_v3_fl(mpr->matrix_space[1], snode->zoom * sbeam_group->state.dims[1]);
+	mpr->matrix_space[3][0] = ((ar->winx / 2) + snode->xof) - ((sbeam_group->state.dims[0] / 2.0f) * snode->zoom);
+	mpr->matrix_space[3][1] = ((ar->winy / 2) + snode->yof) - ((sbeam_group->state.dims[1] / 2.0f) * snode->zoom);
+}
+
+static void WIDGETGROUP_node_sbeam_refresh(const bContext *C, wmManipulatorGroup *mgroup)
+{
+	struct NodeSunBeamsWidgetGroup *sbeam_group = mgroup->customdata;
+	wmManipulator *mpr = sbeam_group->manipulator;
+
+	void *lock;
+	Image *ima = BKE_image_verify_viewer(IMA_TYPE_COMPOSITE, "Viewer Node");
+	ImBuf *ibuf = BKE_image_acquire_ibuf(ima, NULL, &lock);
+
+	if (ibuf) {
+		sbeam_group->state.dims[0] = (ibuf->x > 0) ? ibuf->x : 64.0f;
+		sbeam_group->state.dims[1] = (ibuf->y > 0) ? ibuf->y : 64.0f;
+
+		SpaceNode *snode = CTX_wm_space_node(C);
+		bNode *node = nodeGetActive(snode->edittree);
+
+		/* need to set property here for undo. TODO would prefer to do this in _init */
+		PointerRNA nodeptr;
+		RNA_pointer_create((ID *)snode->edittree, &RNA_CompositorNodeSunBeams, node, &nodeptr);
+		WM_manipulator_target_property_def_rna(mpr, "offset", &nodeptr, "source", -1);
+
+		WM_manipulator_set_flag(mpr, WM_MANIPULATOR_DRAW_MODAL, true);
+	}
+	else {
+		WM_manipulator_set_flag(mpr, WM_MANIPULATOR_HIDDEN, true);
+	}
+
+	BKE_image_release_ibuf(ima, ibuf, lock);
+}
+
+void NODE_WGT_backdrop_sun_beams(wmManipulatorGroupType *wgt)
+{
+	wgt->name = "Sun Beams Widget";
+	wgt->idname = "NODE_WGT_sbeam";
+
+	wgt->flag |= WM_MANIPULATORGROUPTYPE_PERSISTENT;
+
+	wgt->poll = WIDGETGROUP_node_sbeam_poll;
+	wgt->setup = WIDGETGROUP_node_sbeam_setup;
+	wgt->draw_prepare = WIDGETGROUP_node_sbeam_draw_prepare;
+	wgt->refresh = WIDGETGROUP_node_sbeam_refresh;
+}
+
+/** \} */

source/blender/editors/space_node/space_node.c

@@ -867,6 +867,7 @@ static void node_widgets(void)
 	        &(const struct wmManipulatorMapType_Params){SPACE_NODE, RGN_TYPE_WINDOW});
 	WM_manipulatorgrouptype_append_and_link(mmap_type, NODE_WGT_backdrop_transform);
 	WM_manipulatorgrouptype_append_and_link(mmap_type, NODE_WGT_backdrop_crop);
+	WM_manipulatorgrouptype_append_and_link(mmap_type, NODE_WGT_backdrop_sun_beams);
 }
 
 static void node_id_remap(ScrArea *UNUSED(sa), SpaceLink *slink, ID *old_id, ID *new_id)

source/blender/makesrna/RNA_access.h

@@ -175,6 +175,7 @@ extern StructRNA RNA_CompositorNodeSepYCCA;
 extern StructRNA RNA_CompositorNodeSepYUVA;
 extern StructRNA RNA_CompositorNodeSetAlpha;
 extern StructRNA RNA_CompositorNodeSplitViewer;
+extern StructRNA RNA_CompositorNodeSunBeams;
 extern StructRNA RNA_CompositorNodeSwitchView;
 extern StructRNA RNA_CompositorNodeTexture;
 extern StructRNA RNA_CompositorNodeTime;