Class TBGRAReaderPNG
Unit
Declaration
type TBGRAReaderPNG = class(TBGRAImageReader)
Description
Reader for PNG image format
Hierarchy
- TFPCustomImageReader
- TBGRAImageReader
- TBGRAReaderPNG
Overview
Fields
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Chunk: TChunk; |
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DataBytes: TColorData; |
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DataIndex: LongWord; |
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EndOfFile: boolean; |
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TransparentDataValue: TColorData; |
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UseTransparent: boolean; |
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UsingBitGroup: byte; |
Methods
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constructor Create; override; |
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destructor Destroy; override; |
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function GetBitmapDraft(AStream: TStream; AMaxWidth, AMaxHeight: integer; out AOriginalWidth,AOriginalHeight: integer): TBGRACustomBitmap; override; |
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function GetQuickInfo(AStream: TStream): TQuickImageInfo; override; |
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function CalcColor(const ScanLine : PByteArray): TColorData; |
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function DecideSetPixel: TSetPixelProc; virtual; |
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function InternalCheck(Str:TStream) : boolean; override; |
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procedure LoadFrame(AIndex: integer; AImage: TFPCustomImage); |
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procedure AssignPalette; |
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procedure AssignResolutionValues; |
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procedure BGRAHandleScanLine(const y: integer; const ScanLine: PByteArray); |
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procedure BGRAHandleScanLineTr(const y: integer; const ScanLine: PByteArray); |
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procedure DoDecompress(ACompressedData: TStream; AWidth, AHeight: integer); virtual; |
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procedure DoLoadImage(AImage: TFPCustomImage; AData: TStream; AWidth, AHeight: integer); virtual; |
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procedure HandleAlpha; virtual; |
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procedure HandleAnimationControl; virtual; |
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procedure HandleChunk; virtual; |
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procedure HandleData; virtual; |
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procedure HandleFrameControl; virtual; |
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procedure HandleFrameData; virtual; |
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procedure HandleGamma; virtual; |
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procedure HandlePalette; virtual; |
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procedure HandlePhysicalDimensions; virtual; |
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procedure HandleScanLine(const y : integer; const ScanLine : PByteArray); virtual; |
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procedure HandleStdRGB; virtual; |
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procedure HandleUnknown; virtual; |
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procedure InternalRead(Str:TStream; Img:TFPCustomImage); override; |
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procedure PredefinedResolutionValues; virtual; |
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procedure SetBGRAColorPixel(x,y:integer; const CD : TColordata); |
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procedure SetBGRAColorTrPixel(x,y:integer; const CD : TColordata); |
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procedure SetColorPixel(x,y:integer; const CD : TColordata); |
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procedure SetColorTrPixel(x,y:integer; const CD : TColordata); |
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procedure SetPalColPixel(x,y:integer; const CD : TColordata); |
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procedure SetPalettePixel(x,y:integer; const CD : TColordata); |
Properties
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property ConvertColor : TConvertColorProc read FConvertColor; |
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property CountScanlines : EightLong read FCountScanlines; |
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property CurrentPass : byte read FCurrentPass; |
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property FrameControl[AIndex: Integer]: TFrameControlChunk read GetFrameControl; |
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property FrameCount : integer read FFrameCount; |
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property Header : THeaderChunk read FHeader; |
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property Indexed : boolean read FIndexed; |
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property LoopCount : integer read FLoopCount; |
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property MainImageFrameIndex: integer read FMainImageFrameIndex; |
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property MinifyHeight: integer read FMinifyHeight write FMinifyHeight; |
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property OriginalHeight: integer read GetOriginalHeight; |
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property OriginalWidth: integer read GetOriginalWidth; |
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property ScanLineLength : EightLong read FScanLineLength; |
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property ThePalette : TFPPalette read FPalette; |
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property VerticalShrinkFactor: integer read GetVerticalShrinkFactor; |
Description
Fields
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Chunk: TChunk; |
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This item has no description. | |
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DataBytes: TColorData; |
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This item has no description. | |
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DataIndex: LongWord; |
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This item has no description. | |
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EndOfFile: boolean; |
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This item has no description. | |
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TransparentDataValue: TColorData; |
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This item has no description. | |
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UseTransparent: boolean; |
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This item has no description. | |
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UsingBitGroup: byte; |
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This item has no description. | |
Methods
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constructor Create; override; |
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This item has no description. | |
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destructor Destroy; override; |
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This item has no description. | |
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function GetBitmapDraft(AStream: TStream; AMaxWidth, AMaxHeight: integer; out AOriginalWidth,AOriginalHeight: integer): TBGRACustomBitmap; override; |
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This item has no description. Showing description inherited from TBGRAImageReader.GetBitmapDraft. Return a draft of the bitmap, the ratio may change compared to the original width and height (useful to make thumbnails) | |
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function GetQuickInfo(AStream: TStream): TQuickImageInfo; override; |
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This item has no description. Showing description inherited from TBGRAImageReader.GetQuickInfo. Return bitmap information (size, bit depth) | |
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function CalcColor(const ScanLine : PByteArray): TColorData; |
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This item has no description. | |
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function DecideSetPixel: TSetPixelProc; virtual; |
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This item has no description. | |
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function InternalCheck(Str:TStream) : boolean; override; |
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This item has no description. | |
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procedure LoadFrame(AIndex: integer; AImage: TFPCustomImage); |
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This item has no description. | |
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procedure AssignPalette; |
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This item has no description. | |
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procedure AssignResolutionValues; |
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This item has no description. | |
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procedure BGRAHandleScanLine(const y: integer; const ScanLine: PByteArray); |
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This item has no description. | |
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procedure BGRAHandleScanLineTr(const y: integer; const ScanLine: PByteArray); |
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This item has no description. | |
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procedure DoDecompress(ACompressedData: TStream; AWidth, AHeight: integer); virtual; |
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This item has no description. | |
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procedure DoLoadImage(AImage: TFPCustomImage; AData: TStream; AWidth, AHeight: integer); virtual; |
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This item has no description. | |
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procedure HandleAlpha; virtual; |
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This item has no description. | |
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procedure HandleAnimationControl; virtual; |
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This item has no description. | |
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procedure HandleChunk; virtual; |
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This item has no description. | |
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procedure HandleData; virtual; |
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This item has no description. | |
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procedure HandleFrameControl; virtual; |
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This item has no description. | |
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procedure HandleFrameData; virtual; |
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This item has no description. | |
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procedure HandleGamma; virtual; |
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This item has no description. | |
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procedure HandlePalette; virtual; |
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This item has no description. | |
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procedure HandlePhysicalDimensions; virtual; |
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This item has no description. | |
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procedure HandleScanLine(const y : integer; const ScanLine : PByteArray); virtual; |
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This item has no description. | |
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procedure HandleStdRGB; virtual; |
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This item has no description. | |
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procedure HandleUnknown; virtual; |
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This item has no description. | |
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procedure InternalRead(Str:TStream; Img:TFPCustomImage); override; |
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This item has no description. | |
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procedure PredefinedResolutionValues; virtual; |
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This item has no description. | |
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procedure SetBGRAColorPixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
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procedure SetBGRAColorTrPixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
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procedure SetColorPixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
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procedure SetColorTrPixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
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procedure SetPalColPixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
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procedure SetPalettePixel(x,y:integer; const CD : TColordata); |
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This item has no description. | |
Properties
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property ConvertColor : TConvertColorProc read FConvertColor; |
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This item has no description. | |
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property CountScanlines : EightLong read FCountScanlines; |
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This item has no description. | |
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property CurrentPass : byte read FCurrentPass; |
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This item has no description. | |
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property FrameControl[AIndex: Integer]: TFrameControlChunk read GetFrameControl; |
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This item has no description. | |
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property FrameCount : integer read FFrameCount; |
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animation | |
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property Header : THeaderChunk read FHeader; |
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This item has no description. | |
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property Indexed : boolean read FIndexed; |
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This item has no description. | |
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property LoopCount : integer read FLoopCount; |
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This item has no description. | |
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property MainImageFrameIndex: integer read FMainImageFrameIndex; |
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This item has no description. | |
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property MinifyHeight: integer read FMinifyHeight write FMinifyHeight; |
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thumbnail reduction | |
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property OriginalHeight: integer read GetOriginalHeight; |
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This item has no description. | |
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property OriginalWidth: integer read GetOriginalWidth; |
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image format | |
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property ScanLineLength : EightLong read FScanLineLength; |
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This item has no description. | |
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property ThePalette : TFPPalette read FPalette; |
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This item has no description. | |
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property VerticalShrinkFactor: integer read GetVerticalShrinkFactor; |
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This item has no description. | |