diff --git a/backends/pixel/pixel.go b/backends/pixel/pixel.go
index 2b16c02..6976f40 100644
--- a/backends/pixel/pixel.go
+++ b/backends/pixel/pixel.go
@@ -114,13 +114,13 @@ func (backend *Backend) Resized () (resized bool) {
 }
 
 func (backend *Backend) draw () {
-	didDrawing := false
+	// didDrawing := false
 
 	if backend.boundsDirty {
 		backend.window.Clear (
 			backend.config.Color(stone.ColorApplication))
 		backend.boundsDirty = false
-		didDrawing = true
+		// didDrawing = true
 	} else {
 		// TODO: clear out dirty cells before drawing them (we don't
 		// want to clear them out if we have already just cleared
@@ -138,19 +138,26 @@ func (backend *Backend) draw () {
 			if clean { continue }
 
 			// draw cell
+			cell := backend.application.Cell(x, y)
+			content := cell.Rune()
+			if content < 32 { continue }
 			
-			didDrawing = true // TODO: set didDrawing up there ^
+			// didDrawing = true // TODO: set didDrawing up there ^
 			backend.application.MarkClean(x, y)
 		}
 	}
 
-	if didDrawing {
-		backend.window.SwapBuffers()
-	}
+	backend.window.SwapBuffers()
 }
 
 func (backend *Backend) processEvents () {
+	newBounds := backend.window.Bounds().Max
+	backend.boundsDirty = backend.previousBounds != newBounds
+	backend.previousBounds = newBounds
 	
+	if backend.boundsDirty {
+		// TODO: set size of buffer
+	}
 }
 
 func (backend *Backend) calculateWindowSize () (bounds pixel.Rect) {
diff --git a/buffer.go b/buffer.go
index 55145b8..dbefcec 100644
--- a/buffer.go
+++ b/buffer.go
@@ -34,7 +34,7 @@ func (cell Cell) Style (style Style) {
 	return
 }
 
-func (cell Cell) Rune (content rune) {
+func (cell Cell) Rune () (content rune) {
 	content = cell.content
 	return
 }