C# Class ImageManipulation.Quantizer

Summary description for Class1.

Public Methods

Method	Description
Quantize ( Image source ) : Bitmap	Quantize an image and return the resulting output bitmap.

Protected Methods

Method	Description
FirstPass ( BitmapData sourceData, int width, int height ) : void	Execute the first pass through the pixels in the image.
GetPalette ( System.Drawing.Imaging.ColorPalette original ) : System.Drawing.Imaging.ColorPalette	Retrieve the palette for the quantized image.
InitialQuantizePixel ( Color32 pixel ) : void	Override this to process the pixel in the first pass of the algorithm. This function need only be overridden if your quantize algorithm needs two passes, such as an Octree quantizer.
QuantizePixel ( Color32 pixel ) : byte	Override this to process the pixel in the second pass of the algorithm.
Quantizer ( bool singlePass ) : System	Construct the quantizer. 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'.
SecondPass ( BitmapData sourceData, Bitmap output, int width, int height, Rectangle bounds ) : void	Execute a second pass through the bitmap.

Method Details

FirstPass() protected method

Execute the first pass through the pixels in the image.

protected FirstPass ( BitmapData sourceData, int width, int height ) : void
sourceData	System.Drawing.Imaging.BitmapData	The source data.
width	int	The width in pixels of the image.
height	int	The height in pixels of the image.
return	void

GetPalette() protected abstract method

Retrieve the palette for the quantized image.

protected abstract GetPalette ( System.Drawing.Imaging.ColorPalette original ) : System.Drawing.Imaging.ColorPalette
original	System.Drawing.Imaging.ColorPalette	Any old palette, this is overwritten.
return	System.Drawing.Imaging.ColorPalette

InitialQuantizePixel() protected method

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

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

protected InitialQuantizePixel ( Color32 pixel ) : void
pixel	Color32	The pixel to quantize.
return	void

Quantize() public method

Quantize an image and return the resulting output bitmap.

public Quantize ( Image source ) : Bitmap
source	Image	The image to quantize.
return	System.Drawing.Bitmap

QuantizePixel() protected abstract method

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

protected abstract QuantizePixel ( Color32 pixel ) : byte
pixel	Color32	The pixel to quantize.
return	byte

Quantizer() protected method

Construct the quantizer.

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'.

protected Quantizer ( bool singlePass ) : System
singlePass	bool	If true, the quantization only needs to loop through the source pixels once.
return	System

SecondPass() protected method

Execute a second pass through the bitmap.

protected SecondPass ( BitmapData sourceData, Bitmap output, int width, int height, Rectangle bounds ) : void
sourceData	System.Drawing.Imaging.BitmapData	The source bitmap, locked into memory.
output	System.Drawing.Bitmap	The output bitmap.
width	int	The width in pixels of the image.
height	int	The height in pixels of the image.
bounds	System.Drawing.Rectangle	The bounding rectangle.
return	void