Resize Class

This class enables you to resize a bitmap.

Namespace: Aurigma.GraphicsMill.Transforms
Assembly: Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)

Syntax

Visual Basic

Public NotInheritable Class Resize _
	Inherits BitmapTransform

public sealed class Resize : BitmapTransform

Remarks

Using this class you may resample the bitmap: specify Width and Height properties, then apply the transform, and it will return resized bitmap. If you set some of these properties to 0, this property is automatically calculated to preserve the aspect ratio of the image.

Essential parameter of all the geometric Transforms (including resizing) is an interpolation algorithm. It specifies how to calculate intermediate points. Different algorithms produces different quality, but as usual the higher quality it produces, the slower algorithm works. You can select interpolation algorithm with InterpolationMode property.

This class provides interesting feature - you can resize not only entire bitmap, but even a portion of this bitmap. This way you can avoid edge effects (which will arise if you first crop and then resize the bitmap). It is important when you need to stitch several resized portions seamlessly (for example, during optimized drawing). To enable this feature, set CropEnabled property to true and fill CropRectangle with necessary values.

All the coordinates and sizes are measured in units specified with Unit property.

Inheritance Hierarchy

System.Object

L Aurigma.GraphicsMill.SyncHandler

L Aurigma.GraphicsMill.UnitConverterHandler

L Aurigma.GraphicsMill.Transforms.BitmapTransform

L Aurigma.GraphicsMill.Transforms.Resize

Thread Safety

Static members of this type are safe for multi-threaded operations. Instance members of this type are safe for multi-threaded operations.

Supported Pixel Formats

Member Name	Description
Format1bppIndexed	1 bit per pixel. Indexed.
Format4bppIndexed	4 bits per pixel. Indexed.
Format8bppIndexed	8 bits per pixel. Indexed.
Format8bppGrayScale	8 bits per pixel. Grayscale. 8 bits are used for luminosity level.
Format16bppGrayScale	16 bits per pixel. Grayscale. All 16 bits are used for luminosity level (extended pixel format).
Format16bppAGrayScale	16 bits per pixel. Grayscale with alpha channel. 8 bits are used for alpha channel and other 8 bits are used for luminosity level.
Format32bppAGrayScale	32 bits per pixel. Grayscale with alpha channel. 16 bits are used for alpha channel and other 16 bits are used for luminosity level (extended pixel format).
Format16bppRgb565	16 bits per pixel. RGB. 5 bits each are used for the red, and blue components. 6 bits are used for green component.
Format16bppRgb555	16 bits per pixel. RGB. 5 bits each are used for the red, green, and blue components. The rest bit is unused.
Format16bppArgb1555	16 bits per pixel. RGB with alpha channel. 1 bit is used for the alpha component, and 5 bits each are used for the red, green, and blue components.
Format24bppRgb	24 bits per pixel. RGB. 8 bits each are used for the red, green, and blue components.
Format32bppRgb	32 bits per pixel. RGB. 8 bits each are used for the red, green, and blue components. The rest 8 bits are unused.
Format32bppArgb	32 bits per pixel. RGB with alpha channel. 8 bits each are used for the alpha, red, green, and blue components.
Format48bppRgb	48 bits per pixel. RGB. 16 bits each are used for the red, green, and blue components (extended pixel format).
Format64bppArgb	64 bits per pixel. RGB with alpha channel. 16 bits each are used for the alpha, red, green, and blue components (extended pixel format).
Format32bppCmyk	32 bits per pixel. CMYK. 8 bits each are used for the cyan, magenta, yellow, and black components.
Format64bppCmyk	64 bits per pixel. CMYK. 16 bits each are used for the cyan, magenta, yellow, and black components (extended pixel format).
Format80bppAcmyk	80 bits per pixel. CMYK with alpha channel. 16 bits each are used for the alpha, cyan, magenta, yellow, and black components (extended pixel format).