Class ImageHelper

Provides common helper methods related with image manipulation. TODO: Should be moved to base assembly, making it accessible for all Telerik Assemblies.

Inheritance

System.Object

ImageHelper

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: Telerik.WinControls

Assembly: Telerik.WinControls.dll

Syntax

public static class ImageHelper

Methods

ApplyAlpha(Bitmap, Single)

Declaration

public static void ApplyAlpha(Bitmap bitmap, float fAlpha)

Parameters

System.Drawing.Bitmap bitmap

System.Single fAlpha

ApplyMask(Bitmap, Brush)

Declaration

public static void ApplyMask(Bitmap bitmap, Brush brush)

Parameters

System.Drawing.Bitmap bitmap

System.Drawing.Brush brush

AreColorsSame(Color, Color)

Declaration

public static bool AreColorsSame(Color color1, Color color2)

Parameters

System.Drawing.Color color1

System.Drawing.Color color2

Returns

System.Boolean

BitmapInvertColors(Bitmap)

Declaration

public static Bitmap BitmapInvertColors(Bitmap original)

Parameters

System.Drawing.Bitmap original

Returns

System.Drawing.Bitmap

ChangeImagePixels(Image, Color)

Declaration

public static Image ChangeImagePixels(Image image, Color color)

Parameters

System.Drawing.Image image

System.Drawing.Color color

Returns

System.Drawing.Image

ConvertToDib(Image)

Converts the image to Device Independent Bitmap format of type BITFIELDS. This is (wrongly) accepted by many applications as containing transparency

Declaration

public static byte[] ConvertToDib(Image image)

Parameters

System.Drawing.Image image Image to convert to DIB

Returns

System.Byte[] The image converted to DIB, in bytes.

CopyImageToClipboard(Image)

Copies given image to the clipboard. Different applications understand different image formats, so this method applies the three most common image formats to the data object - Bitmap, PNG and DIB.

Declaration

public static void CopyImageToClipboard(Image image)

Parameters

System.Drawing.Image image The image to copy.

Crop(Bitmap, Rectangle)

Crops recatnalge from image

Declaration

public static Bitmap Crop(Bitmap image, Rectangle cropRectangle)

Parameters

System.Drawing.Bitmap image An instance of System.Drawing.Bitmap.

System.Drawing.Rectangle cropRectangle An instance of System.Drawing.Rectangle

Returns

System.Drawing.Bitmap Cropped image with the size of cropped rectangle

GetBitmapRegionPath(Bitmap, Color)

Declaration

public static GraphicsPath GetBitmapRegionPath(Bitmap bmp, Color transparent)

Parameters

System.Drawing.Bitmap bmp

System.Drawing.Color transparent

Returns

System.Drawing.Drawing2D.GraphicsPath

GetBytesFromImage(Image)

Declaration

public static byte[] GetBytesFromImage(Image image)

Parameters

System.Drawing.Image image

Returns

System.Byte[]

GetClipboardImage()

Gets image from the clipboard and preserves pixel transparency. If there is no image data in the clipboard, returns null.

Declaration

public static Image GetClipboardImage()

Returns

System.Drawing.Image The image from clipboard.

GetClipboardImage(DataObject)

Retrieves an image from the given clipboard data object, in the order PNG, DIB, Bitmap, Image object.

Declaration

public static Bitmap GetClipboardImage(DataObject clipboardData)

Parameters

System.Windows.Forms.DataObject clipboardData The clipboard data.

Returns

System.Drawing.Bitmap The extracted image, or null if no supported image type was found.

GetImageData(Bitmap, out Int32)

Gets the raw bytes from an image.

Declaration

public static byte[] GetImageData(Bitmap sourceImage, out int stride)

Parameters

System.Drawing.Bitmap sourceImage The image to get the bytes from.

System.Int32 stride Stride of the retrieved image data.

Returns

System.Byte[] The raw bytes of the image

GetImageFromBytes(Byte[])

Declaration

public static Image GetImageFromBytes(byte[] bytes)

Parameters

System.Byte[] bytes

Returns

System.Drawing.Image

HslToRgb(Double, Double, Double, Double)

Declaration

public static Color HslToRgb(double h, double s, double l, double a)

Parameters

System.Double h

System.Double s

System.Double l

System.Double a

Returns

System.Drawing.Color

IsDarkColor(Color)

Declaration

public static bool IsDarkColor(Color color)

Parameters

System.Drawing.Color color

Returns

System.Boolean

PointInRegion(Region, Point)

Declaration

public static bool PointInRegion(Region region, Point client)

Parameters

System.Drawing.Region region

System.Drawing.Point client

Returns

System.Boolean

RegionFromBitmap(Bitmap, Color)

Declaration

public static Region RegionFromBitmap(Bitmap bmp, Color transparent)

Parameters

System.Drawing.Bitmap bmp

System.Drawing.Color transparent

Returns

System.Drawing.Region