From 58027c095f51bd4f68e45b0bc21a7ed3edb8c747 Mon Sep 17 00:00:00 2001
From: IoIxD <alphaproject217@gmail.com>
Date: Mon, 21 Sep 2026 16:51:46 -0700
Subject: [PATCH] snapshot previous buffer so that we don't have ghosting
 anymore on rotate (this also makes resizing A Bit better)

---
 include/Mw/LowLevel/Wayland.h |  2 ++
 src/backend/wayland/wayland.c | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/Mw/LowLevel/Wayland.h b/include/Mw/LowLevel/Wayland.h
index 9123458..c176ee2 100644
--- a/include/Mw/LowLevel/Wayland.h
+++ b/include/Mw/LowLevel/Wayland.h
@@ -428,6 +428,8 @@ struct _MwLLWayland {
 	MwBool do_cascading_draw;
 	int    cascading_child_num;
 
+	cairo_surface_t* snapshot;
+
 	MwBool dispatching_resize;
 
 	struct _MwLLWaylandShmBuffer  framebuffer;
diff --git a/src/backend/wayland/wayland.c b/src/backend/wayland/wayland.c
index 650e949..24c6a1b 100644
--- a/src/backend/wayland/wayland.c
+++ b/src/backend/wayland/wayland.c
@@ -939,6 +939,13 @@ static void draw_children(MwLL handle) {
 
 	cairo_reset_clip(handle->wayland.cairo.front_cairo_back);
 
+	if(handle->wayland.snapshot) {
+		cairo_set_operator(handle->wayland.cairo.front_cairo_back, CAIRO_OPERATOR_SOURCE);
+		cairo_set_source_surface(handle->wayland.cairo.front_cairo_back, handle->wayland.snapshot, 0, 0);
+		cairo_paint(handle->wayland.cairo.front_cairo_back);
+		cairo_set_operator(handle->wayland.cairo.front_cairo_back, CAIRO_OPERATOR_OVER);
+	}
+
 	MwLLWaylandChildrenIterate(handle, draw_child);
 
 	if(handle->wayland.configured) MwLLWaylandBufferUpdate(handle, &handle->wayland.framebuffer);
@@ -1299,6 +1306,21 @@ static void MwLLEndDrawImpl(MwLL handle) {
 	}
 	root->wayland.do_cascading_draw = MwTRUE;
 
+	if(handle->wayland.snapshot) {
+		cairo_surface_destroy(handle->wayland.snapshot);
+		handle->wayland.snapshot = NULL;
+	}
+	if(handle->wayland.ww > 0 && handle->wayland.wh > 0) {
+		cairo_t* snap_cr;
+
+		handle->wayland.snapshot = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, handle->wayland.ww, handle->wayland.wh);
+		snap_cr			 = cairo_create(handle->wayland.snapshot);
+		cairo_set_operator(snap_cr, CAIRO_OPERATOR_SOURCE);
+		cairo_set_source_surface(snap_cr, handle->wayland.cairo.front_cs_back, 0, 0);
+		cairo_paint(snap_cr);
+		cairo_destroy(snap_cr);
+	}
+
 	if(handle->wayland.configured) {
 		if(handle->wayland.type == MwLL_WAYLAND_TOPLEVEL) {
 			MwLLWaylandBufferUpdate(handle, &handle->wayland.backbuffer);