C# Class FlatRedBall.IO.PngLoader

Notes: Interlaced pngs are now fully supported Only the chunks of data that are outlined in the Png specification as Critical Chunks are supported. TODO: Allow use of the CRC values to check the validity of the Chunk data Consider implementing the Ancillary Chunks since chunks like gAMA can drastically change visible colors.

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Méthodes publiques

Свойство	Type	Description
ByteBufferSize	int
ColorBufferSize	int

Méthodes publiques

Méthode	Description
GetPixelData ( string fileName ) : ImageData	Loads a .png image from the fileName given and returns an array of pixel colors.
Initialize ( ) : void

Private Methods

Méthode	Description
BuildPixels ( byte image, HeaderInfo &header, PaletteInfo &palette ) : Color[]	Does the remaining work to convert the byte[] containing the image into a Color[] containing colors for each pixel. This operation is different for most individual combinations of ColorType and bitDepth and currently only ColorType 2 is supported.
CheckSignature ( Stream &file ) : bool	Checks the first 8 bytes of the file in the given Stream against the standard signature for .png images.
ConvertToType ( uint type ) : ChunkTypes	Converts a 4-byte uint into an enumerated ChunkType
ExtractBits ( byte sourceByte, int pointer, byte bitDepth ) : byte
FormUint ( Stream &bytes ) : uint	Arranges and combines the byte values stored in byte[] bytes in order to form a uint.
GetBytesPerPixel ( HeaderInfo header ) : float	Uses the ColorType and Bitdepth of this image to calculate the number of bytes per pixel.
GetChunkData ( Stream &file, uint length ) : byte[]	Reads the bytes of a chunk's ChunkData segment from the Stream and returns it in a byte[].
GetNextChunk ( Stream &file, List &chunks ) : bool	Reads the length, type, data and CRC of the next chunk in the file, and then forms a Chunk struct using this data.
LoadFile ( string fileName ) : int	Loads a file (hopefully a .png image) into a byte[].
OldMethod ( byte image, HeaderInfo &header, PaletteInfo &palette ) : Color[]
PaethPredictor ( int left, int up, int upLeft ) : byte	A helper for the ReverseFilterPaeth method
ProcessChunks ( List chunks, HeaderInfo header, PaletteInfo &palette ) : byte[]	Takes a List of all of the Chunks in the .png image being loaded (after IHDR is loaded and removed) and processes each Chunk appropriately before returning the compressed image. NOTE: Currently only processes the required Chunks PLTE, IDAT and IEND. Ancillary chunks are currently unsupported.
ReadFile ( Stream stream ) : int	Reads the data in the given Stream and stores it in a byte[] that is then trimmed and returned.
ReadHeader ( List &chunks ) : HeaderInfo	Processes the IHDR chunk by reading and storing all of its information in a HeaderInfo struct.
ReadImageData ( Chunk idat, byte &imageData, int &numberOfBytesRead ) : void	Reads data from the given IDAT chunk and appends it to the List imageData.
ReadPalette ( Chunk plte, PaletteInfo &palette ) : void	Processes the PLTE chunk by reading in all of the indexed color values and storing them in a PaletteInfo struct.
ReadStream ( InflaterInputStream &stream ) : void	Reads the decompressed(inflated) image data from an InflaterInputStream that was fed the compressed image.
ReverseFilterAverage ( byte &image, uint pointer, uint bps, float bpp, byte bitDepth ) : void	Reverses the filtering done on a scanline of pixels that have been filtered using Method 2 (Average)
ReverseFilterPaeth ( byte &image, uint pointer, uint bps, float bpp, byte bitDepth ) : void	Reverses the filtering done on a scanline of pixels that have been filtered using Method 3 (Paeth)
ReverseFilterSub ( byte &image, uint pointer, uint bps, float bpp, byte bitDepth ) : void	Reverses the filtering done on a scanline of pixels that have been filtered using Method 0 (Subtract)
ReverseFilterUp ( byte &image, uint pointer, uint bps, float bpp, byte bitDepth ) : void	Reverses the filtering done on a scanline of pixels that have been filtered using Method 1 (Up)
ReverseFiltering ( byte image, HeaderInfo header ) : byte[]	Calls the appropriate Reverse Filtering methods to return the image to its original state.

Method Details

GetPixelData() public static méthode

Loads a .png image from the fileName given and returns an array of pixel colors.

public static GetPixelData ( string fileName ) : ImageData
fileName	string	The name of the .png image to be loaded.
Résultat	FlatRedBall.Graphics.Texture.ImageData

Initialize() public static méthode

public static Initialize ( ) : void
Résultat	void

Property Details

ByteBufferSize public_oe static_oe property

public static int ByteBufferSize
Résultat	int

ColorBufferSize public_oe static_oe property

public static int ColorBufferSize
Résultat	int