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Unit BGRAColorQuantization

📄 Source code

Description
Uses
Structures
Functions and Procedures
Types
Constants
Variables

Description

Color quantization i.e. the reduction to a palette using dithering or not, provided by TBGRAColorQuantizer class.

Uses

Overview

Structures

Name Description
Class TBGRAApproxPalette Palette approximating color base on a color tree
Class TBGRAApproxPaletteViaLargerPalette Palette approximating via a large palette
Class TBGRAColorBox Box area in the colorspace allowing to split in two different areas
Class TBGRAColorQuantizer Implementation of color quantization.
Class TBGRAColorTree Binary tree of colors for color approximation
Object TDimensionMinMax Range according to one dimension of a color

Functions and Procedures

function BGRAColorCount(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption): integer;
function GetPixelStrictComparer(ADimension: TColorDimension): TIsChannelStrictlyGreaterFunc;
function GetPixelValueComparer(ADimension: TColorDimension): TIsChannelGreaterThanOrEqualToValueFunc;

Types

TBGRALeafColorMode = (...);
TBiggestLeafMethod = (...);
TColorBoxBounds = array[TColorDimension] of TDimensionMinMax;
TColorDimension = (...);
TColorDimensions = set of TColorDimension;
TIsChannelGreaterThanOrEqualToValueFunc = function (p : PBGRAPixel; v: UInt32): boolean;
TIsChannelStrictlyGreaterFunc = TBGRAPixelComparer;

Constants

AllColorDimensions = [cdRed,cdGreen,cdBlue,cdAlpha,cdRGB,cdRG,cdGB,cdRB,cdRInvG,cdGInvB,cdRInvB,cdRInvGB,cdGInvRB,cdBInvRG, cdSaturation];

Description

Functions and Procedures

function BGRAColorCount(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption): integer;

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function GetPixelStrictComparer(ADimension: TColorDimension): TIsChannelStrictlyGreaterFunc;

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function GetPixelValueComparer(ADimension: TColorDimension): TIsChannelGreaterThanOrEqualToValueFunc;

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Types

TBGRALeafColorMode = (...);

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Values
  • lcAverage
  • lcCenter
  • lcExtremum
  • lcMix
TBiggestLeafMethod = (...);

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Values
  • blMix
  • blApparentInterval
  • blWeight
TColorBoxBounds = array[TColorDimension] of TDimensionMinMax;

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TColorDimension = (...);

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Values
  • cdFast
  • cdRed
  • cdGreen
  • cdBlue
  • cdAlpha
  • cdRGB
  • cdRG
  • cdGB
  • cdRB
  • cdRInvG
  • cdGInvB
  • cdRInvB
  • cdRInvGB
  • cdGInvRB
  • cdBInvRG
  • cdSaturation
TColorDimensions = set of TColorDimension;

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TIsChannelGreaterThanOrEqualToValueFunc = function (p : PBGRAPixel; v: UInt32): boolean;

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TIsChannelStrictlyGreaterFunc = TBGRAPixelComparer;

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Constants

AllColorDimensions = [cdRed,cdGreen,cdBlue,cdAlpha,cdRGB,cdRG,cdGB,cdRB,cdRInvG,cdGInvB,cdRInvB,cdRInvGB,cdGInvRB,cdBInvRG, cdSaturation];

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