C# 클래스 Hjg.Pngcs.PngWriter

Writes a PNG image, line by line.

파일 보기 프로젝트 열기: devedse/DeveMazeGenerator 1 사용 예제들

공개 프로퍼티들

프로퍼티	타입	설명
ImgInfo	Hjg.Pngcs.ImageInfo

보호된 프로퍼티들

프로퍼티	타입	설명
filename	String
rowb	byte[]
rowbfilter	byte[]
rowbprev	byte[]

공개 메소드들

메소드	설명
ComputeCompressionRatio ( ) : double	Computes compressed size/raw size, approximate Actually: compressed size = total size of IDAT data , raw size = uncompressed pixel bytes = rows * (bytesPerRow + 1)
CopyChunksFirst ( PngReader reader, int copy_mask ) : void
CopyChunksLast ( PngReader reader, int copy_mask ) : void
End ( ) : void	Finalizes the image creation and closes the file stream. This MUST be called after writing the lines.
GetChunksList ( ) : ChunksListForWrite
GetFilename ( ) : String	Filename or description, from the optional constructor argument.
GetMetadata ( ) : PngMetadata
IsUnpackedMode ( ) : bool
PngWriter ( Stream outputStream, Hjg.Pngcs.ImageInfo imgInfo ) : System	Constructs a PngWriter from a outputStream, with no filename information
PngWriter ( Stream outputStream, Hjg.Pngcs.ImageInfo imgInfo, String filename ) : System	Constructs a PngWriter from a outputStream, with optional filename or description After construction nothing is writen yet. You still can set some parameters (compression, filters) and queue chunks before start writing the pixels. See also `FileHelper.createPngWriter()`
SetFilterType ( FilterType filterType ) : void	Sets internal prediction filter type, or strategy to choose it. This must be called just after constructor, before starting writing. Recommended values: DEFAULT (default) or AGGRESIVE
SetUseUnPackedMode ( bool useUnpackedMode ) : void
WriteRow ( Hjg.Pngcs.ImageLine imgline, int rownumber ) : void	this uses the row number from the imageline!
WriteRow ( int newrow ) : void
WriteRow ( int newrow, int rown ) : void
WriteRowByte ( byte newrow, int rown ) : void
WriteRowInt ( int newrow, int rown ) : void	Writes a full image row. This must be called sequentially from n=0 to n=rows-1 One integer per sample , in the natural order: R G B R G B ... (or R G B A R G B A... if has alpha) The values should be between 0 and 255 for 8 bitspc images, and between 0- 65535 form 16 bitspc images (this applies also to the alpha channel if present) The array can be reused.
WriteRowsByte ( byte image ) : void
WriteRowsInt ( int image ) : void

보호된 메소드들

메소드	설명
encodeRowFromByte ( byte row ) : void
encodeRowFromInt ( int row ) : void

비공개 메소드들

메소드	설명
CopyChunks ( PngReader reader, int copy_mask, bool onlyAfterIdat ) : void	copy chunks from reader - copy_mask : see ChunksToWrite.COPY_XXX If we are after idat, only considers those chunks after IDAT in PngReader TODO: this should be more customizable
FilterRow ( int rown ) : void
FilterRowAverage ( ) : void
FilterRowNone ( ) : void
FilterRowPaeth ( ) : void
FilterRowSub ( ) : void
FilterRowUp ( ) : void
SumRowbfilter ( ) : long
WriteEndChunk ( ) : void
WriteFirstChunks ( ) : void
WriteLastChunks ( ) : void
WriteSignatureAndIHDR ( ) : void	Write id signature and also "IHDR" chunk
filterAndSend ( int rown ) : void
init ( ) : void	init: is called automatically before writing the first row
prepareEncodeRow ( int rown ) : void
reportResultsForFilter ( int rown, FilterType type, bool tentative ) : void

메소드 상세

ComputeCompressionRatio() 공개 메소드

Computes compressed size/raw size, approximate

Actually: compressed size = total size of IDAT data , raw size = uncompressed pixel bytes = rows * (bytesPerRow + 1)

public ComputeCompressionRatio ( ) : double
리턴	double

CopyChunksFirst() 공개 메소드

public CopyChunksFirst ( PngReader reader, int copy_mask ) : void
reader	PngReader
copy_mask	int
리턴	void

CopyChunksLast() 공개 메소드

public CopyChunksLast ( PngReader reader, int copy_mask ) : void
reader	PngReader
copy_mask	int
리턴	void

End() 공개 메소드

Finalizes the image creation and closes the file stream.

This MUST be called after writing the lines.

public End ( ) : void
리턴	void

GetChunksList() 공개 메소드

public GetChunksList ( ) : ChunksListForWrite
리턴	ChunksListForWrite

GetFilename() 공개 메소드

Filename or description, from the optional constructor argument.

public GetFilename ( ) : String
리턴	String

GetMetadata() 공개 메소드

public GetMetadata ( ) : PngMetadata
리턴	PngMetadata

IsUnpackedMode() 공개 메소드

public IsUnpackedMode ( ) : bool
리턴	bool

PngWriter() 공개 메소드

Constructs a PngWriter from a outputStream, with no filename information

public PngWriter ( Stream outputStream, Hjg.Pngcs.ImageInfo imgInfo ) : System
outputStream	Stream
imgInfo	Hjg.Pngcs.ImageInfo
리턴	System

PngWriter() 공개 메소드

Constructs a PngWriter from a outputStream, with optional filename or description

After construction nothing is writen yet. You still can set some parameters (compression, filters) and queue chunks before start writing the pixels. See also FileHelper.createPngWriter()

public PngWriter ( Stream outputStream, Hjg.Pngcs.ImageInfo imgInfo, String filename ) : System
outputStream	Stream	Opened stream for binary writing
imgInfo	Hjg.Pngcs.ImageInfo	Basic image parameters
filename	String	Optional, can be the filename or a description.
리턴	System

SetFilterType() 공개 메소드

Sets internal prediction filter type, or strategy to choose it.

This must be called just after constructor, before starting writing. Recommended values: DEFAULT (default) or AGGRESIVE

public SetFilterType ( FilterType filterType ) : void
filterType	FilterType	One of the five prediction types or strategy to choose it
리턴	void

SetUseUnPackedMode() 공개 메소드

public SetUseUnPackedMode ( bool useUnpackedMode ) : void
useUnpackedMode	bool
리턴	void

WriteRow() 공개 메소드

this uses the row number from the imageline!

public WriteRow ( Hjg.Pngcs.ImageLine imgline, int rownumber ) : void
imgline	Hjg.Pngcs.ImageLine
rownumber	int
리턴	void

WriteRow() 공개 메소드

public WriteRow ( int newrow ) : void
newrow	int
리턴	void

WriteRow() 공개 메소드

public WriteRow ( int newrow, int rown ) : void
newrow	int
rown	int
리턴	void

WriteRowByte() 공개 메소드

public WriteRowByte ( byte newrow, int rown ) : void
newrow	byte
rown	int
리턴	void

WriteRowInt() 공개 메소드

Writes a full image row.

This must be called sequentially from n=0 to n=rows-1 One integer per sample , in the natural order: R G B R G B ... (or R G B A R G B A... if has alpha) The values should be between 0 and 255 for 8 bitspc images, and between 0- 65535 form 16 bitspc images (this applies also to the alpha channel if present) The array can be reused.

public WriteRowInt ( int newrow, int rown ) : void
newrow	int	Array of pixel values
rown	int	Number of row, from 0 (top) to rows-1 (bottom)
리턴	void

WriteRowsByte() 공개 메소드

public WriteRowsByte ( byte image ) : void
image	byte
리턴	void

WriteRowsInt() 공개 메소드

public WriteRowsInt ( int image ) : void
image	int
리턴	void

encodeRowFromByte() 보호된 메소드

protected encodeRowFromByte ( byte row ) : void
row	byte
리턴	void

encodeRowFromInt() 보호된 메소드

protected encodeRowFromInt ( int row ) : void
row	int
리턴	void

프로퍼티 상세

ImgInfo 공개적으로 프로퍼티

Basic image info, inmutable

public ImageInfo,Hjg.Pngcs ImgInfo
리턴	Hjg.Pngcs.ImageInfo

filename 보호되어 있는 프로퍼티

filename, or description - merely informative, can be empty

protected String filename
리턴	String

rowb 보호되어 있는 프로퍼티

raw current row, as array of bytes,counting from 1 (index 0 is reserved for filter type)

protected byte[] rowb
리턴	byte[]

rowbfilter 보호되어 있는 프로퍼티

raw current row, after filtered

protected byte[] rowbfilter
리턴	byte[]

rowbprev 보호되어 있는 프로퍼티

previuos raw row

protected byte[] rowbprev
리턴	byte[]