Interface Quantizer
- All Known Implementing Classes:
OctTreeQuantizer
public interface Quantizer
The interface for an image quantizer. The addColor method is called (repeatedly
if necessary) with all the image pixels. A color table can then be returned by
calling the buildColorTable method.
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Method Summary
Modifier and TypeMethodDescriptionvoid
addPixels
(int[] pixels, int offset, int count) Add pixels to the quantizer.int[]
Build a color table from the added pixels.int
getIndexForColor
(int rgb) Using the previously-built color table, return the index into that table for a pixel.void
setup
(int numColors) Initialize the quantizer.
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Method Details
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setup
Initialize the quantizer. This should be called before adding any pixels.- Parameters:
numColors
- the number of colors we're quantizing to.
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addPixels
Add pixels to the quantizer.- Parameters:
pixels
- the array of ARGB pixelsoffset
- the offset into the arraycount
- the count of pixels
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buildColorTable
int[] buildColorTable()Build a color table from the added pixels.- Returns:
- an array of ARGB pixels representing a color table
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getIndexForColor
Using the previously-built color table, return the index into that table for a pixel. This is guaranteed to return a valid index - returning the index of a color closer to that requested if necessary.- Parameters:
rgb
- the pixel to find- Returns:
- the pixel's index in the color table
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