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.");
}
}
}
}
/// <summary>
/// Returns true if screenshots can be captured.
/// </summary>
/// <remarks>
/// <para>
/// This method may return false if the application is running as a service which has
/// not been granted the right to interact with the desktop.
/// </para>
/// </remarks>
/// <returns>True if the screen can be captured.</returns>
public static bool CanCaptureScreenshot()
{
return(ScreenGrabber.CanCaptureScreenshot());
}
