本文整理汇总了C#中CGBitmapContext.Clip方法的典型用法代码示例。如果您正苦于以下问题：C# CGBitmapContext.Clip方法的具体用法？C# CGBitmapContext.Clip怎么用？C# CGBitmapContext.Clip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.Clip方法的3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: GetCell
public override UITableViewCell GetCell (UITableView tv)
{
var cell = tv.DequeueReusableCell (ikey);
if (cell == null){
cell = new UITableViewCell (UITableViewCellStyle.Default, ikey);
}
if (scaled == null)
return cell;
Section psection = Parent as Section;
bool roundTop = psection.Elements [0] == this;
bool roundBottom = psection.Elements [psection.Elements.Count-1] == this;
using (var cs = CGColorSpace.CreateDeviceRGB ()){
using (var bit = new CGBitmapContext (IntPtr.Zero, dimx, dimy, 8, 0, cs, CGImageAlphaInfo.PremultipliedFirst)){
// Clipping path for the image, different on top, middle and bottom.
if (roundBottom){
bit.AddArc (rad, rad, rad, (float) Math.PI, (float) (3*Math.PI/2), false);
} else {
bit.MoveTo (0, rad);
bit.AddLineToPoint (0, 0);
}
bit.AddLineToPoint (dimx, 0);
bit.AddLineToPoint (dimx, dimy);
if (roundTop){
bit.AddArc (rad, dimy-rad, rad, (float) (Math.PI/2), (float) Math.PI, false);
bit.AddLineToPoint (0, rad);
} else {
bit.AddLineToPoint (0, dimy);
}
bit.Clip ();
bit.DrawImage (rect, scaled.CGImage);
cell.ImageView.Image = UIImage.FromImage (bit.ToImage ());
}
}
return cell;
}示例2: InitializeCell
public override void InitializeCell(UITableView tableView)
{
if (_Scaled != null)
{
bool roundTop = Section.Elements[0] == this;
bool roundBottom = Section.Elements[Section.Elements.Count - 1] == this;
using (var cs = CGColorSpace.CreateDeviceRGB())
{
using (var bit = new CGBitmapContext(IntPtr.Zero, dimx, dimy, 8, 0, cs, CGImageAlphaInfo.PremultipliedFirst))
{
// Clipping path for the image, different on top, middle and bottom.
if (roundBottom)
{
bit.AddArc(rad, rad, rad, (float)Math.PI, (float)(3 * Math.PI / 2), false);
}
else
{
bit.MoveTo(0, rad);
bit.AddLineToPoint(0, 0);
}
bit.AddLineToPoint(dimx, 0);
bit.AddLineToPoint(dimx, dimy);
if (roundTop)
{
bit.AddArc(rad, dimy - rad, rad, (float)(Math.PI / 2), (float)Math.PI, false);
bit.AddLineToPoint(0, rad);
}
else
{
bit.AddLineToPoint(0, dimy);
}
bit.Clip();
bit.DrawImage(rect, _Scaled.CGImage);
Cell.ImageView.Image = UIImage.FromImage(bit.ToImage());
}
}
}
}示例3: MakeRoundCornerImage
public static UIImage MakeRoundCornerImage(UIImage img, int cornerWidth, int cornerHeight)
{
UIImage newImage = null;
if (null != img)
{
var w = img.Size.Width;
var h = img.Size.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
CGContext context = new CGBitmapContext(null, (int)w, (int)h, 8, (int)(4 * w), colorSpace, CGImageAlphaInfo.PremultipliedFirst);
context.BeginPath();
var rect = new RectangleF(0, 0, img.Size.Width, img.Size.Height);
AddRoundedRectToPath (context, rect, cornerWidth, cornerHeight);
context.ClosePath();
context.Clip();
var cgImage = img.CGImage;
context.DrawImage (new RectangleF(0, 0, w, h), cgImage);
cgImage.Dispose();
CGImage imageMasked = ((CGBitmapContext)context).ToImage();
context.Dispose();
colorSpace.Dispose();
newImage = new UIImage(imageMasked);
imageMasked.Dispose();
}
return newImage;
}