fix hidpi issues

main.go

@@ -19,7 +19,13 @@ import (
 
 func Bootstrap() *Env {
 
-	rl.InitWindow(800, 600, "bootstrap")
+	// HiDPI: report logical sizes to layout code while drawing into the full
+	// framebuffer. Required for correct scaling on Wayland/XWayland mixed-DPI
+	// setups. Leaving the window non-resizable so tiling WMs (Hyprland) treat
+	// it as a floating window via fixed min/max size hints.
+	rl.SetConfigFlags(rl.FlagWindowHighdpi)
+
+	rl.InitWindow(800, 600, "sumi sierpinski arrow")
 
 	monitor := rl.GetCurrentMonitor()
 	fmt.Printf("Using monitor %d\n", monitor)
@@ -59,7 +65,11 @@ func Bootstrap() *Env {
 	controlsWidth := int(float64(windowWidth) * controlsRelWidth)
 	viewportWidth := windowWidth - controlsWidth
 
+	// Reopen at the real size so the window's fixed-size hints land on
+	// Hyprland the first time — avoids a tiling layout being applied and
+	// the resize flicker from SetWindowSize.
 	rl.CloseWindow()
+	rl.SetConfigFlags(rl.FlagWindowHighdpi)
 
 	log.Printf("Storing snapshots at '%s'\n", snapshotsPath)
 
@@ -79,7 +89,6 @@ func Bootstrap() *Env {
 		Offscreen: sg.Rect{X: 0, Y: 0, Width: float32(graphicsWidth), Height: float32(graphicsHeight)},
 	}
 
-	//rl.SetConfigFlags(rl.FlagMsaa4xHint)
 	rl.InitWindow(int32(layout.Window.Width), int32(layout.Window.Height), "sumi sierpinski arrow")
 	rl.SetTargetFPS(30)