ImageManipulation.Quantizer Class Reference

Inheritance diagram for ImageManipulation.Quantizer:

Classes
struct	Color32
	Struct that defines a 32 bpp colour. More...

Public Member Functions
Bitmap	Quantize (Image source)
	Quantize an image and return the resulting output bitmap.

Protected Member Functions
	Quantizer (bool singlePass)
	Construct the quantizer.
void	FirstPass (BitmapData sourceData, int width, int height)
	Execute the first pass through the pixels in the image.
void	SecondPass (BitmapData sourceData, Bitmap output, int width, int height, Rectangle bounds)
	Execute a second pass through the bitmap.
virtual void	InitialQuantizePixel (Color32 *pixel)
	Override this to process the pixel in the first pass of the algorithm.
abstract byte	QuantizePixel (Color32 *pixel)
	Override this to process the pixel in the second pass of the algorithm.
abstract ColorPalette	GetPalette (ColorPalette original)
	Retrieve the palette for the quantized image.

Constructor & Destructor Documentation

ImageManipulation.Quantizer.Quantizer ( bool  singlePass )

protected

Construct the quantizer.

Parameters

singlePass

If true, the quantization only needs to loop through the source pixels once.

If you construct this class with a true value for singlePass, then the code will, when quantizing your image, only call the 'QuantizeImage' function. If two passes are required, the code will call 'InitialQuantizeImage' and then 'QuantizeImage'.

Member Function Documentation

void ImageManipulation.Quantizer.FirstPass ( BitmapData  sourceData, int  width, int  height  )

protected

Execute the first pass through the pixels in the image.

Parameters

sourceData	The source data.
width	The width in pixels of the image.
height	The height in pixels of the image.

abstract ColorPalette ImageManipulation.Quantizer.GetPalette ( ColorPalette  original )

protectedpure virtual

Retrieve the palette for the quantized image.

Parameters

original

Any old palette, this is overrwritten.

Returns

The new color palette.

Implemented in ImageManipulation.OctreeQuantizer.

virtual void ImageManipulation.Quantizer.InitialQuantizePixel ( Color32 *  pixel )

protectedvirtual

Override this to process the pixel in the first pass of the algorithm.

Parameters

pixel

The pixel to quantize.

This function need only be overridden if your quantize algorithm needs two passes, such as an Octree quantizer.

Reimplemented in ImageManipulation.OctreeQuantizer.

Bitmap ImageManipulation.Quantizer.Quantize

(

Image

source

)

Quantize an image and return the resulting output bitmap.

Parameters

source

The image to quantize.

Returns

A quantized version of the image.

abstract byte ImageManipulation.Quantizer.QuantizePixel ( Color32 *  pixel )

protectedpure virtual

Override this to process the pixel in the second pass of the algorithm.

Parameters

pixel

The pixel to quantize.

Returns

The quantized value.

Implemented in ImageManipulation.OctreeQuantizer.

void ImageManipulation.Quantizer.SecondPass ( BitmapData  sourceData, Bitmap  output, int  width, int  height, Rectangle  bounds  )

protected

Execute a second pass through the bitmap.

Parameters

sourceData	The source bitmap, locked into memory.
output	The output bitmap.
width	The width in pixels of the image.
height	The height in pixels of the image.
bounds	The bounding rectangle.

---

The documentation for this class was generated from the following file:

• MapRenderer/Quantizer.cs