本文整理汇总了C#中CGBitmapContext.SelectFont方法的典型用法代码示例。如果您正苦于以下问题：C# CGBitmapContext.SelectFont方法的具体用法？C# CGBitmapContext.SelectFont怎么用？C# CGBitmapContext.SelectFont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.SelectFont方法的4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: MakeCalendarBadge
public static UIImage MakeCalendarBadge (UIImage template, string smallText, string bigText)
{
using (var cs = CGColorSpace.CreateDeviceRGB ()){
using (var context = new CGBitmapContext (IntPtr.Zero, 59, 58, 8, 59*4, cs, CGImageAlphaInfo.PremultipliedLast)){
//context.ScaleCTM (0.5f, -1);
context.TranslateCTM (0, 0);
context.DrawImage (new RectangleF (0, 0, 59, 58), template.CGImage);
context.SetFillColor (0, 0, 0, 1);
// The _small_ string
context.SelectFont ("Helvetica-Bold", 14f, CGTextEncoding.MacRoman);
// Pretty lame way of measuring strings, as documented:
var start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (smallText);
var width = context.TextPosition.X - start;
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((59-width)/2, 10, smallText); // was 46
// The BIG string
context.SelectFont ("Helvetica-Bold", 32, CGTextEncoding.MacRoman);
start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (bigText);
width = context.TextPosition.X - start;
context.SetFillColor (0, 0, 0, 1);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((59-width)/2, 25, bigText); // was 9
context.StrokePath ();
return UIImage.FromImage (context.ToImage ());
}
}
}示例2: 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
RectangleF imageViewFrame = new RectangleF (0, -NavigationController.NavigationBar.Frame.Height, View.Frame.Width, View.Frame.Height);
imageView = new UIImageView (imageViewFrame);
View.AddSubview (imageView);
// create our offscreen bitmap context
// size
SizeF bitmapSize = new SizeF (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 SizeF (10, -10), 15);
// 3) perform your drawing operation
context.SetFillColor (.3f, .3f, .9f, 1);
context.FillRect (new RectangleF (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.SetShadowWithColor(new SizeF (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3: MakeCalendarBadgeSmall
public static UIImage MakeCalendarBadgeSmall (UIImage template, string smallText, string bigText)
{
int imageWidth=30, imageHeight=29;
int smallTextY=5, bigTextY=12;
float smallTextSize=7f, bigTextSize=16f;
using (var cs = CGColorSpace.CreateDeviceRGB ()) {
using (var context = new CGBitmapContext (IntPtr.Zero
, imageWidth, imageHeight, 8, imageWidth*4, cs
, CGImageAlphaInfo.PremultipliedLast)) {
//context.ScaleCTM (0.5f, -1);
context.TranslateCTM (0, 0);
context.DrawImage (new RectangleF (0, 0, imageWidth, imageHeight), template.CGImage);
context.SetFillColor (0, 0, 0, 1);
// The _small_ string
context.SelectFont ("Helvetica-Bold", smallTextSize, CGTextEncoding.MacRoman);
// Pretty lame way of measuring strings, as documented:
var start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (smallText);
var width = context.TextPosition.X - start;
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((imageWidth-width)/2, smallTextY, smallText);
// The BIG string
context.SelectFont ("Helvetica-Bold", bigTextSize, CGTextEncoding.MacRoman);
start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (bigText);
width = context.TextPosition.X - start;
context.SetFillColor (0, 0, 0, 1);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((imageWidth-width)/2, bigTextY, bigText);
context.StrokePath ();
return UIImage.FromImage (context.ToImage ());
}
}
}示例4: CreateCalendarImage
static UIImage CreateCalendarImage(DateTime date)
{
string month = date.ToString ("MMMM");
string day = date.Day.ToString ();
using (var cs = CGColorSpace.CreateDeviceRGB ()) {
using (var context = new CGBitmapContext (IntPtr.Zero, 57, 57, 8, 57 * 4, cs, CGImageAlphaInfo.PremultipliedLast)) {
//context.ScaleCTM (0.5f, -1);
context.TranslateCTM (0, 0);
context.DrawImage (new RectangleF (0, 0, 57, 57), Calendar.CGImage);
context.SetFillColor (1.0f, 1.0f, 1.0f, 1.0f);
context.SelectFont ("Helvetica", 10f, CGTextEncoding.MacRoman);
// Pretty lame way of measuring strings, as documented:
var start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (month);
var width = context.TextPosition.X - start;
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((57 - width) / 2, 46, month);
// The big string
context.SelectFont ("Helvetica-Bold", 32, CGTextEncoding.MacRoman);
start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (day);
width = context.TextPosition.X - start;
context.SetFillColor (0.0f, 0.0f, 0.0f, 1.0f);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((57 - width) / 2, 9, day);
context.StrokePath ();
return UIImage.FromImage (context.ToImage ());
}
}
}