public void CaptureScreenshot_WhenBitmapIsNullAndZoomed_CapturesScaledScreenshotIntoNewBitmap()
{
var parameters = new CaptureParameters()
{
Zoom = 0.25
};
using (var grabber = new ScreenGrabber(parameters))
{
if (ScreenGrabber.CanCaptureScreenshot())
{
using (Bitmap bitmap = grabber.CaptureScreenshot(null))
{
TestLog.EmbedImage("Screenshot with 0.25x zoom", bitmap);
Assert.Multiple(() =>
{
Assert.AreApproximatelyEqual(ScreenGrabber.GetScreenSize().Width / 2,
grabber.ScreenshotWidth, 1);
Assert.AreApproximatelyEqual(ScreenGrabber.GetScreenSize().Height / 2,
grabber.ScreenshotHeight, 1);
Assert.AreEqual(grabber.ScreenshotWidth, bitmap.Width);
Assert.AreEqual(grabber.ScreenshotHeight, bitmap.Height);
});
}
}
else
{
Assert.Throws <ScreenshotNotAvailableException>(() => grabber.CaptureScreenshot(null),
"CanCaptureScreenshot returned false so expected an exception to be thrown.");
}
}
}
public void CaptureScreenshot_WhenBitmapIsNotNull_CapturesScreenshotIntoProvidedBitmap()
{
var parameters = new CaptureParameters()
{
Zoom = 0.25
};
using (var grabber = new ScreenGrabber(parameters))
{
using (Bitmap bitmap = new Bitmap(grabber.ScreenshotWidth, grabber.ScreenshotHeight))
{
if (ScreenGrabber.CanCaptureScreenshot())
{
Bitmap returnedBitmap = grabber.CaptureScreenshot(bitmap);
TestLog.EmbedImage("Screenshot with 0.25x zoom", bitmap);
Assert.AreSame(bitmap, returnedBitmap);
}
else
{
Assert.Throws <ScreenshotNotAvailableException>(() => grabber.CaptureScreenshot(bitmap),
"CanCaptureScreenshot returned false so expected an exception to be thrown.");
}
}
}
}
public void CaptureScreenshot_WhenBitmapIsNotTheRightSize_Throws()
{
var parameters = new CaptureParameters()
{
Zoom = 0.25
};
using (var grabber = new ScreenGrabber(parameters))
{
var ex = Assert.Throws <ArgumentException>(() => grabber.CaptureScreenshot(new Bitmap(1, grabber.ScreenshotHeight)));
Assert.Contains(ex.Message, "The bitmap dimensions must exactly match the screenshot dimensions.");
ex = Assert.Throws <ArgumentException>(() => grabber.CaptureScreenshot(new Bitmap(grabber.ScreenshotWidth, 1)));
Assert.Contains(ex.Message, "The bitmap dimensions must exactly match the screenshot dimensions.");
}
}
public void CaptureScreenshot_WhenDisposed_Throws()
{
var parameters = new CaptureParameters();
var grabber = new ScreenGrabber(parameters);
grabber.Dispose();
Assert.Throws <ObjectDisposedException>(() => grabber.CaptureScreenshot(null));
}
/// <summary>
/// Captures an image of the entire desktop.
/// </summary>
/// <param name="parameters">The capture parameters.</param>
/// <returns>The screenshot.</returns>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="parameters"/> is null.</exception>
/// <exception cref="ScreenshotNotAvailableException">Thrown if a screenshot cannot be captured at this time.</exception>
public static Bitmap Screenshot(CaptureParameters parameters)
{
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
using (var grabber = new ScreenGrabber(parameters))
{
grabber.OverlayManager.AddOverlay(GetOverlayManager().ToOverlay());
return(grabber.CaptureScreenshot(null));
}
}
