wlr_scene: Introduce wlr_scene_buffer_set_filter_mode

include/wlr/types/wlr_scene.h

@@ -22,6 +22,7 @@
 #include <pixman.h>
 #include <time.h>
 #include <wayland-server-core.h>
+#include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_damage_ring.h>
 #include <wlr/types/wlr_linux_dmabuf_v1.h>
 #include <wlr/util/addon.h>
@@ -168,6 +169,7 @@ struct wlr_scene_buffer {
 	// private state
 
 	float opacity;
+	enum wlr_scale_filter_mode filter_mode;
 	uint64_t active_outputs;
 	struct wlr_texture *texture;
 	struct wlr_fbox src_box;
@@ -423,6 +425,12 @@ void wlr_scene_buffer_set_transform(struct wlr_scene_buffer *scene_buffer,
 void wlr_scene_buffer_set_opacity(struct wlr_scene_buffer *scene_buffer,
 	float opacity);
 
+/**
+* Sets the filter mode to use when scaling the buffer
+*/
+void wlr_scene_buffer_set_filter_mode(struct wlr_scene_buffer *scene_buffer,
+	enum wlr_scale_filter_mode filter_mode);
+
 /**
  * Calls the buffer's frame_done signal.
  */
@@ -455,7 +463,7 @@ bool wlr_scene_output_commit(struct wlr_scene_output *scene_output);
  * Render and populate given output state.
  */
 bool wlr_scene_output_build_state(struct wlr_scene_output *scene_output,
-    struct wlr_output_state *state);
+	struct wlr_output_state *state);
 
 /**
  * Call wlr_surface_send_frame_done() on all surfaces in the scene rendered by

types/scene/wlr_scene.c

@@ -816,6 +816,16 @@ void wlr_scene_buffer_set_opacity(struct wlr_scene_buffer *scene_buffer,
 	scene_node_update(&scene_buffer->node, NULL);
 }
 
+void wlr_scene_buffer_set_filter_mode(struct wlr_scene_buffer *scene_buffer,
+	    enum wlr_scale_filter_mode filter_mode) {
+	if (scene_buffer->filter_mode == filter_mode) {
+		return;
+	}
+
+	scene_buffer->filter_mode = filter_mode;
+	scene_node_update(&scene_buffer->node, NULL);
+}
+
 static struct wlr_texture *scene_buffer_get_texture(
 		struct wlr_scene_buffer *scene_buffer, struct wlr_renderer *renderer) {
 	struct wlr_client_buffer *client_buffer =
@@ -1146,6 +1156,7 @@ static void scene_node_render(struct wlr_scene_node *node, const struct render_d
 			.transform = transform,
 			.clip = &render_region,
 			.alpha = &scene_buffer->opacity,
+			.filter_mode = scene_buffer->filter_mode,
 		});
 
 		wl_signal_emit_mutable(&scene_buffer->events.output_present, data->output);