public void PaintOverlays_WhenRequestIsNull_Throws()
{
var overlayManager = new OverlayManager();
Assert.Throws<ArgumentNullException>(() => overlayManager.PaintOverlays(null));
}
public void PaintOverlays_PaintsAllOverlaysAndRestoresGraphicsContextForEachOne()
{
var overlayManager = new OverlayManager();
var overlay1 = new OverlayThatChangesInterpolationMode();
var overlay2 = new OverlayThatChangesInterpolationMode();
overlayManager.AddOverlay(overlay1);
overlayManager.AddOverlay(overlay2);
using (Bitmap bitmap = new Bitmap(32, 32))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
var request = new OverlayPaintRequest(graphics, new Rectangle(0, 0, 32, 32), 0, 0);
overlayManager.PaintOverlays(request);
Assert.Multiple(() =>
{
Assert.AreEqual(InterpolationMode.HighQualityBilinear, graphics.InterpolationMode);
Assert.IsTrue(overlay1.WasPainted);
Assert.AreEqual(InterpolationMode.HighQualityBilinear, overlay1.OldInterpolationMode);
Assert.IsTrue(overlay2.WasPainted);
Assert.AreEqual(InterpolationMode.HighQualityBilinear, overlay2.OldInterpolationMode);
});
}
}
}
protected override void PaintImpl(OverlayPaintRequest request)
{
overlayManager.PaintOverlays(request);
}
