Class TBGRACustomColorQuantizer
Unit
Declaration
type TBGRACustomColorQuantizer = class(TObject)
Description
Abstract class for color quantization.
Quantization is the process by which each color is reduced to an index into a palette. Surrounding pixels can affect the approximate color, an effect called dithering.
Hierarchy
- TObject
- TBGRACustomColorQuantizer
Overview
Methods
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constructor Create(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption); overload; virtual; abstract; |
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constructor Create(AColors: array of TBGRAPixel; ASeparateAlphaChannel: boolean); overload; |
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constructor Create(APalette: TBGRACustomPalette; ASeparateAlphaChannel: boolean); overload; virtual; abstract; |
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constructor Create(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption; AReductionColorCount: integer); overload; virtual; abstract; |
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constructor Create(AColors: array of TBGRAPixel; ASeparateAlphaChannel: boolean; AReductionColorCount: integer); overload; |
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constructor Create(APalette: TBGRACustomPalette; ASeparateAlphaChannel: boolean; AReductionColorCount: integer); overload; virtual; abstract; |
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function GetDitheredBitmap(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; ABounds: TRect): TBGRACustomBitmap; overload; virtual; abstract; |
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function GetDitheredBitmap(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap): TBGRACustomBitmap; overload; |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap): Pointer; overload; |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; out AScanlineSize: PtrInt): Pointer; overload; |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AByteOrder: TRawImageByteOrder; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; out AScanlineSize: PtrInt): Pointer; overload; virtual; abstract; |
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function GetDominantColor: TBGRAPixel; virtual; |
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function GetPalette: TBGRACustomApproxPalette; virtual; abstract; |
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function GetReductionColorCount: integer; virtual; abstract; |
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function GetSourceColor(AIndex: integer): TBGRAPixel; virtual; abstract; |
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function GetSourceColorCount: Integer; virtual; abstract; |
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procedure ApplyDitheringInplace(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; ABounds: TRect); overload; virtual; abstract; |
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procedure ApplyDitheringInplace(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap); overload; |
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procedure SaveBitmapToFile(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AFilenameUTF8: string); overload; |
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procedure SaveBitmapToFile(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AFilenameUTF8: string; AFormat: TBGRAImageFormat); overload; |
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procedure SaveBitmapToStream(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AStream: TStream; AFormat: TBGRAImageFormat); virtual; abstract; |
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procedure SetReductionColorCount(AValue: Integer); virtual; abstract; |
Properties
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property DominantColor: TBGRAPixel read GetDominantColor; |
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property ReducedPalette: TBGRACustomApproxPalette read GetPalette; |
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property ReductionColorCount: Integer read GetReductionColorCount write SetReductionColorCount; |
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property SourceColor[AIndex: integer]: TBGRAPixel read GetSourceColor; |
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property SourceColorCount: Integer read GetSourceColorCount; |
Description
Methods
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constructor Create(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption); overload; virtual; abstract; |
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This item has no description. | |
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constructor Create(AColors: array of TBGRAPixel; ASeparateAlphaChannel: boolean); overload; |
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This item has no description. | |
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constructor Create(APalette: TBGRACustomPalette; ASeparateAlphaChannel: boolean); overload; virtual; abstract; |
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This item has no description. | |
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constructor Create(ABitmap: TBGRACustomBitmap; AAlpha: TAlphaChannelPaletteOption; AReductionColorCount: integer); overload; virtual; abstract; |
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This item has no description. | |
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constructor Create(AColors: array of TBGRAPixel; ASeparateAlphaChannel: boolean; AReductionColorCount: integer); overload; |
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This item has no description. | |
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constructor Create(APalette: TBGRACustomPalette; ASeparateAlphaChannel: boolean; AReductionColorCount: integer); overload; virtual; abstract; |
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This item has no description. | |
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function GetDitheredBitmap(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; ABounds: TRect): TBGRACustomBitmap; overload; virtual; abstract; |
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This item has no description. | |
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function GetDitheredBitmap(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap): TBGRACustomBitmap; overload; |
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This item has no description. | |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap): Pointer; overload; |
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This item has no description. | |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; out AScanlineSize: PtrInt): Pointer; overload; |
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This item has no description. | |
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function GetDitheredBitmapIndexedData(ABitDepth: integer; AByteOrder: TRawImageByteOrder; AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; out AScanlineSize: PtrInt): Pointer; overload; virtual; abstract; |
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This item has no description. | |
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function GetDominantColor: TBGRAPixel; virtual; |
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This item has no description. | |
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function GetPalette: TBGRACustomApproxPalette; virtual; abstract; |
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This item has no description. | |
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function GetReductionColorCount: integer; virtual; abstract; |
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This item has no description. | |
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function GetSourceColor(AIndex: integer): TBGRAPixel; virtual; abstract; |
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This item has no description. | |
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function GetSourceColorCount: Integer; virtual; abstract; |
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This item has no description. | |
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procedure ApplyDitheringInplace(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; ABounds: TRect); overload; virtual; abstract; |
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This item has no description. | |
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procedure ApplyDitheringInplace(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap); overload; |
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This item has no description. | |
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procedure SaveBitmapToFile(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AFilenameUTF8: string); overload; |
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This item has no description. | |
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procedure SaveBitmapToFile(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AFilenameUTF8: string; AFormat: TBGRAImageFormat); overload; |
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This item has no description. | |
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procedure SaveBitmapToStream(AAlgorithm: TDitheringAlgorithm; ABitmap: TBGRACustomBitmap; AStream: TStream; AFormat: TBGRAImageFormat); virtual; abstract; |
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This item has no description. | |
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procedure SetReductionColorCount(AValue: Integer); virtual; abstract; |
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This item has no description. | |
Properties
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property DominantColor: TBGRAPixel read GetDominantColor; |
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This item has no description. | |
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property ReducedPalette: TBGRACustomApproxPalette read GetPalette; |
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This item has no description. | |
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property ReductionColorCount: Integer read GetReductionColorCount write SetReductionColorCount; |
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This item has no description. | |
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property SourceColor[AIndex: integer]: TBGRAPixel read GetSourceColor; |
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This item has no description. | |
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property SourceColorCount: Integer read GetSourceColorCount; |
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This item has no description. | |