backends/x/draw.go

@@ -51,13 +51,15 @@ func (backend *Backend) drawRune (x, y int, character rune) {
 			Y: fixed.I(origin.Y - backend.metrics.descent),
 		},
 		character)
-		
+
-	// strokeRectangle (
+	if backend.drawCellBounds {	
-		// &image.Uniform {
+		strokeRectangle (
-			// C: backend.config.Color(stone.ColorForeground),
+			&image.Uniform {
-		// },
+				C: backend.config.Color(stone.ColorForeground),
-		// backend.canvas,
+			},
-		// backend.boundsOfCell(x, y))
+			backend.canvas,
+			backend.boundsOfCell(x, y))
+	}
 		
 	draw.DrawMask (
 		backend.canvas,
@@ -86,6 +88,18 @@ func (backend *Backend) drawCells (forceRedraw bool) (areas []image.Rectangle) {
 		areas = append(areas, backend.boundsOfCell(x, y))
 		backend.drawRune(x, y, content)
 	}}
+
+	if backend.drawBufferBounds && forceRedraw {
+		strokeRectangle (
+			&image.Uniform {
+				C: backend.config.Color(stone.ColorForeground),
+			},
+			backend.canvas,
+			image.Rectangle {
+				Min: backend.originOfCell(0, 0),
+				Max: backend.originOfCell(width, height),
+			})
+	}
 	return
 }
 

backends/x/factory.go

@@ -126,6 +126,10 @@ func factory (application *stone.Application) (output stone.Backend, err error)
 		Connect(backend.connection, backend.window.Id)
 	xevent.KeyReleaseFun(backend.handleKeyRelease).
 		Connect(backend.connection, backend.window.Id)
+
+	// uncomment these to draw debug bounds
+	// backend.drawCellBounds = true
+	// backend.drawBufferBounds = true
 	
 	output = backend
 	return

backends/x/x.go

@@ -21,6 +21,9 @@ type Backend struct {
 	canvas      *xgraphics.Image
 	channel     chan(stone.Event)
 
+	drawCellBounds   bool
+	drawBufferBounds bool
+
 	drawLock sync.Mutex
 
 	font struct {