本文整理汇总了C#中CGBitmapContext.SetShadow方法的典型用法代码示例。如果您正苦于以下问题：C# CGBitmapContext.SetShadow方法的具体用法？C# CGBitmapContext.SetShadow怎么用？C# CGBitmapContext.SetShadow使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CGBitmapContext的用法示例。
在下文中一共展示了CGBitmapContext.SetShadow方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ViewDidLoad
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
// set the background color of the view to white
View.BackgroundColor = UIColor.White;
// instantiate a new image view that takes up the whole screen and add it to
// the view hierarchy
CGRect imageViewFrame = new CGRect (0, -NavigationController.NavigationBar.Frame.Height, View.Frame.Width, View.Frame.Height);
imageView = new UIImageView (imageViewFrame);
View.AddSubview (imageView);
// create our offscreen bitmap context
// size
CGSize bitmapSize = new CGSize (View.Frame.Size);
using (CGBitmapContext context = new CGBitmapContext (IntPtr.Zero, (int)bitmapSize.Width, (int)bitmapSize.Height, 8, (int)(4 * bitmapSize.Width), CGColorSpace.CreateDeviceRGB (), CGImageAlphaInfo.PremultipliedFirst)) {
//==== create a grayscale shadow
// 1) save graphics state
context.SaveState ();
// 2) set shadow context for offset and blur
context.SetShadow (new CGSize (10, -10), 15);
// 3) perform your drawing operation
context.SetFillColor (.3f, .3f, .9f, 1);
context.FillRect (new CGRect (100, 600, 300, 250));
// 4) restore the graphics state
context.RestoreState ();
//==== create a color shadow
// 1) save graphics state
context.SaveState ();
// 2) set shadow context for offset and blur
context.SetShadow (new CGSize (15, -15), 10, UIColor.Blue.CGColor);
// 3) perform your drawing operation
context.SelectFont ("Helvetica-Bold", 40, CGTextEncoding.MacRoman);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
string text = "Shadows are fun and easy!";
context.ShowTextAtPoint (150, 200, text, text.Length);
// 4) restore the graphics state
context.RestoreState ();
// output the drawing to the view
imageView.Image = UIImage.FromImage (context.ToImage ());
}
}示例2: AdjustImage
public static UIImage AdjustImage(CGRect rect,UIImage template, CGBlendMode mode,nfloat red,nfloat green,nfloat blue,nfloat alpha )
{
using (var cs = CGColorSpace.CreateDeviceRGB ()){
using (var context = new CGBitmapContext (IntPtr.Zero, (int)rect.Width, (int)rect.Height, 8, (int)rect.Height*8, cs, CGImageAlphaInfo.PremultipliedLast)){
context.SetShadow(new CGSize(0.0f, 1.0f), 0.7f, UIColor.Black.CGColor);
context.TranslateCTM(0.0f,0f);
//context.ScaleCTM(1.0f,-1.0f);
context.DrawImage(rect,template.CGImage);
context.SetBlendMode(mode);
context.ClipToMask(rect,template.CGImage);
context.SetFillColor(red,green,blue,alpha);
context.FillRect(rect);
return UIImage.FromImage (context.ToImage ());
}
}
}