CILinearGradient Class
Definition
Important
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A gradient that fades one color linearly into another.
public class CILinearGradient : CoreImage.CIFilter, CoreImage.ICILinearGradientProtocol, IDisposabletype CILinearGradient = class
inherit CIFilter
interface ICILinearGradientProtocol
interface INativeObject
interface IDisposable
interface ICIFilterProtocol- Inheritance
- Derived
- Implements
Remarks
The following example shows this filter in use
var point0 = new CIVector(0, 0); // Default [0 0]
var point1 = new CIVector(250, 250); // Default [200 200]
var linearGrad = new CILinearGradient() {
Point0 = point0,
Point1 = point1,
Color0 = new CIColor (UIColor.Red),
Color1 = new CIColor (UIColor.Blue)
};
// The Generator Filters need to be cropped before they can be displayed
var crop = new CICrop () {
Image = linearGrad.OutputImage,
// Create the Bounds based on the Size of the application Window. (UIWindow)
Rectangle = new CIVector (0, 0, window.Bounds.Width, window.Bounds.Height)
};
// Get the final Generated image from the Crop filter
var output = crop.OutputImage;
// To render the results, we need to create a context, and then
// use one of the context rendering APIs, in this case, we render the
// result into a CoreGraphics image, which is merely a useful representation
//
var context = CIContext.FromOptions (null);
var cgimage = context.CreateCGImage (output, output.Extent);
// The above cgimage can be added to a screen view, for example, this
// would add it to a UIImageView on the screen:
myImageView.Image = UIImage.FromImage (cgimage);
Produces the following output:
Constructors
| Name | Description |
|---|---|
| CILinearGradient() |
Creates a new CILinearGradient with default values. |
| CILinearGradient(NativeHandle) |
A constructor used when creating managed representations of unmanaged objects. Called by the runtime. |
| CILinearGradient(NSCoder) |
A constructor that initializes the object from the data stored in the unarchiver object. |
| CILinearGradient(NSObjectFlag) |
Constructor to call on derived classes to skip initialization and merely allocate the object. |
| CILinearGradient(String) |
Creates a new CILinearGradient with the specified name. |
Properties
| Name | Description |
|---|---|
| AccessibilityAttributedUserInputLabels | (Inherited from NSObject) |
| AccessibilityRespondsToUserInteraction | (Inherited from NSObject) |
| AccessibilityTextualContext | (Inherited from NSObject) |
| AccessibilityUserInputLabels | (Inherited from NSObject) |
| Attributes |
Configurable attributes of the filter. (Inherited from CIFilter) |
| Class | (Inherited from NSObject) |
| ClassHandle |
The Objective-C class handle for this class. (Inherited from CIFilter) |
| Color0 |
Gets or sets the color at InputPoint0. |
| Color1 |
Gets or sets the color at InputPoint1. |
| DebugDescription | (Inherited from NSObject) |
| Description | (Inherited from NSObject) |
| ExposedBindings | (Inherited from NSObject) |
| Handle |
Handle (pointer) to the unmanaged object representation. (Inherited from NSObject) |
| InputKeys |
Gets an array that contains the names of the input keys for the filter. (Inherited from CIFilter) |
| InputPoint0 |
Gets or sets the first point. |
| InputPoint1 |
Gets or sets the second point. |
| IsDirectBinding | (Inherited from NSObject) |
| IsProxy | (Inherited from NSObject) |
| Item[NSString] |
Gets the value that is identified by |
| Name |
Gets the filter name. (Inherited from CIFilter) |
| OutputImage | |
| OutputKeys |
Gets an array that contains the names of the output keys for the filter. (Inherited from CIFilter) |
| RetainCount | (Inherited from NSObject) |
| Self | (Inherited from NSObject) |
| Superclass | (Inherited from NSObject) |
| SuperHandle |
Handle used to represent the methods in the base class for this NSObject. (Inherited from NSObject) |
| Zone | (Inherited from NSObject) |