UI: Add scaling filter options for scene items to UI

Adds scale filtering options to the scene item right-click context menu.

obs/data/locale/en-US.ini

@@ -168,6 +168,13 @@ Basic.DisplayCapture="Display Capture"
 # display context menu
 Basic.Main.PreviewConextMenu.Enable="Enable Preview"
 
+# scale filtering
+ScaleFiltering="Scale Filtering"
+ScaleFiltering.Point="Point"
+ScaleFiltering.Bilinear="Bilinear"
+ScaleFiltering.Bicubic="Bicubic"
+ScaleFiltering.Lanczos="Lanczos"
+
 # deinterlacing
 Deinterlacing="Deinterlacing"
 Deinterlacing.Discard="Discard"

obs/window-basic-main.cpp

@@ -2881,6 +2881,38 @@ QMenu *OBSBasic::AddDeinterlacingMenu(obs_source_t *source)
 	return menu;
 }
 
+void OBSBasic::SetScaleFilter()
+{
+	QAction *action = reinterpret_cast<QAction*>(sender());
+	obs_scale_type mode = (obs_scale_type)action->property("mode").toInt();
+	OBSSceneItem sceneItem = GetCurrentSceneItem();
+
+	obs_sceneitem_set_scale_filter(sceneItem, mode);
+}
+
+QMenu *OBSBasic::AddScaleFilteringMenu(obs_sceneitem_t *item)
+{
+	QMenu *menu = new QMenu(QTStr("ScaleFiltering"));
+	obs_scale_type scaleFilter = obs_sceneitem_get_scale_filter(item);
+	QAction *action;
+
+#define ADD_MODE(name, mode) \
+	action = menu->addAction(QTStr("" name), this, \
+				SLOT(SetScaleFilter())); \
+	action->setProperty("mode", (int)mode); \
+	action->setCheckable(true); \
+	action->setChecked(scaleFilter == mode);
+
+	ADD_MODE("Disable",                 OBS_SCALE_DISABLE);
+	ADD_MODE("ScaleFiltering.Point",    OBS_SCALE_POINT);
+	ADD_MODE("ScaleFiltering.Bilinear", OBS_SCALE_BILINEAR);
+	ADD_MODE("ScaleFiltering.Bicubic",  OBS_SCALE_BICUBIC);
+	ADD_MODE("ScaleFiltering.Lanczos",  OBS_SCALE_LANCZOS);
+#undef ADD_MODE
+
+	return menu;
+}
+
 void OBSBasic::CreateSourcePopupMenu(QListWidgetItem *item, bool preview)
 {
 	QMenu popup(this);
@@ -2939,6 +2971,10 @@ void OBSBasic::CreateSourcePopupMenu(QListWidgetItem *item, bool preview)
 			popup.addMenu(AddDeinterlacingMenu(source));
 			popup.addSeparator();
 		}
+
+		popup.addMenu(AddScaleFilteringMenu(sceneItem));
+		popup.addSeparator();
+
 		popup.addMenu(sourceProjector);
 		popup.addSeparator();
 

obs/window-basic-main.hpp

@@ -333,6 +333,8 @@ private slots:
 	void SetDeinterlacingMode();
 	void SetDeinterlacingOrder();
 
+	void SetScaleFilter();
+
 private:
 	/* OBS Callbacks */
 	static void SceneReordered(void *data, calldata_t *params);
@@ -400,6 +402,7 @@ public:
 	void ReorderSceneItem(obs_sceneitem_t *item, size_t idx);
 
 	QMenu *AddDeinterlacingMenu(obs_source_t *source);
+	QMenu *AddScaleFilteringMenu(obs_sceneitem_t *item);
 	void CreateSourcePopupMenu(QListWidgetItem *item, bool preview);
 
 	void UpdateTitleBar();