CIToneCurve Class
Definition
Important
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The CIToneCurve CoreImage filter
public class CIToneCurve : CoreImage.CIFilter, CoreImage.ICIToneCurveProtocol, IDisposabletype CIToneCurve = class
inherit CIFilter
interface ICIToneCurveProtocol
interface INativeObject
interface IDisposable
interface ICIFilterProtocol- Inheritance
- Implements
Remarks
The following example shows this filter in use
// Create a CIImage from a file.
CIImage flower = CIImage.FromCGImage (UIImage.FromFile ("flower.png").CGImage);
// Create the points used to create the tone curve.
var point0 = new CIVector(0,0); // Default [0 0]
var point1 = new CIVector(.1F, .5F); // Default [.25 .25]
var point2 = new CIVector(.3F, .15F); // Default [.3 .15]
var point3 = new CIVector(.6F, .6F); // Default [.75 .75]
var point4 = new CIVector(1.1F, 1F); // Default [1 1]
// Construct the ToneCurve filter
var toneCurve = new CIToneCurve()
{
Image = flower,
Point0 = point0,
Point1 = point1,
Point2 = point2,
Point3 = point3,
Point4 = point4,
};
// Get the adjusted image from the filter.
var output = toneCurve.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);
With the following source:
Produces the following output:
"Flower" © 2012 Milica Sekulic, used under a Creative Commons Attribution-ShareAlike license: https://creativecommons.org/licenses/by-sa/3.0/
Constructors
| Name | Description |
|---|---|
| CIToneCurve() |
Creates a new CIToneCurve with default values. |
| CIToneCurve(NativeHandle) |
A constructor used when creating managed representations of unmanaged objects. Called by the runtime. |
| CIToneCurve(NSCoder) |
A constructor that initializes the object from the data stored in the unarchiver object. |
| CIToneCurve(NSObjectFlag) |
Constructor to call on derived classes to skip initialization and merely allocate the object. |
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) |
| DebugDescription | (Inherited from NSObject) |
| Description | (Inherited from NSObject) |
| ExposedBindings | (Inherited from NSObject) |
| Extrapolate | |
| Handle |
Handle (pointer) to the unmanaged object representation. (Inherited from NSObject) |
| InputImage |
Gets or sets an image to filter. |
| InputKeys |
Gets an array that contains the names of the input keys for the filter. (Inherited from CIFilter) |
| InputPoint0 |
Gets or sets tthe point in the zeroth index position through which to interpolate the tone curve. |
| InputPoint1 |
Gets or sets the point in the first index position through which to interpolate the tone curve. |
| InputPoint2 |
Gets or sets the point in the second index position through which to interpolate the tone curve. |
| InputPoint3 |
Gets or sets the point in the third index position through which to interpolate the tone curve. |
| InputPoint4 |
Gets or sets the point in the fourth index position through which to interpolate the tone curve. |
| 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) |