Fix cursor blinking in integrated GPUs

Optimization for Input::set_custom_mouse_cursor when used inside
_process function. (Avoids cursor blinking in low end devices)

2 files changed, 18 insertions, 0 deletions

diff --git a/platform/javascript/os_javascript.cpp b/platform/javascript/os_javascript.cpp
index d96ffc3a55..5363cd4af7 100644
--- a/platform/javascript/os_javascript.cpp
+++ b/platform/javascript/os_javascript.cpp
@@ -448,6 +448,18 @@ void OS_JavaScript::set_cursor_shape(CursorShape p_shape) {
 void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
 
 	if (p_cursor.is_valid()) {
+
+		Map<CursorShape, Vector<Variant> >::Element *cursor_c = cursors_cache.find(p_shape);
+
+		if (cursor_c) {
+			if (cursor_c->get()[0] == p_cursor && cursor_c->get()[1] == p_hotspot) {
+				set_cursor_shape(p_shape);
+				return;
+			}
+
+			cursors_cache.erase(p_shape);
+		}
+
 		Ref<Texture> texture = p_cursor;
 		Ref<AtlasTexture> atlas_texture = p_cursor;
 		Ref<Image> image;
@@ -551,6 +563,11 @@ void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_s
 
 		cursors[p_shape] = url;
 
+		Vector<Variant> params;
+		params.push_back(p_cursor);
+		params.push_back(p_hotspot);
+		cursors_cache.insert(p_shape, params);
+
 	} else if (cursors[p_shape] != "") {
 		/* clang-format off */
 		EM_ASM({
diff --git a/platform/javascript/os_javascript.h b/platform/javascript/os_javascript.h
index 9635465c0d..10676c49f7 100644
--- a/platform/javascript/os_javascript.h
+++ b/platform/javascript/os_javascript.h
@@ -52,6 +52,7 @@ class OS_JavaScript : public OS_Unix {
 	Ref<InputEventKey> deferred_key_event;
 	CursorShape cursor_shape;
 	String cursors[CURSOR_MAX];
+	Map<CursorShape, Vector<Variant> > cursors_cache;
 	Point2 touches[32];
 
 	Point2i last_click_pos;