package png

Import Path
	image/png (on golang.org and go.dev)

Dependency Relation
	imports 10 packages, and imported by 0 packages

Involved Source Files
	      paeth.go
	   d➜ reader.go
		Package png implements a PNG image decoder and encoder.

		The PNG specification is at https://www.w3.org/TR/PNG/.
	      writer.go
Package-Level Type Names (total 6)

	/* sort by: alphabet | popularity */
	 type CompressionLevel int (basic type)

		As Types Of (total 4)
			const BestCompression
			const BestSpeed
			const DefaultCompression
			const NoCompression

	 type Encoder (struct)
		Encoder configures encoding PNG images.

		Fields (total 2)
			BufferPool EncoderBufferPool
				BufferPool optionally specifies a buffer pool to get temporary
				EncoderBuffers when encoding an image.

			CompressionLevel CompressionLevel
		Methods (only one)
			(*T) Encode(w io.Writer, m image.Image) error
				Encode writes the Image m to w in PNG format.


	 type EncoderBuffer encoder (struct)
		EncoderBuffer holds the buffers used for encoding PNG images.

		As Outputs Of (at least one exported)
			func EncoderBufferPool.Get() *EncoderBuffer
		As Inputs Of (at least one exported)
			func EncoderBufferPool.Put(*EncoderBuffer)

	 type EncoderBufferPool (interface)
		EncoderBufferPool is an interface for getting and returning temporary
		instances of the EncoderBuffer struct. This can be used to reuse buffers
		when encoding multiple images.

		Methods (total 2)
			( T) Get() *EncoderBuffer
			( T) Put(*EncoderBuffer)

	 type FormatError string (basic type)
		A FormatError reports that the input is not a valid PNG.

		Methods (only one)
			( T) Error() string
		Implements (at least one exported)
			 T : error

	 type UnsupportedError string (basic type)
		An UnsupportedError reports that the input uses a valid but unimplemented PNG feature.

		Methods (only one)
			( T) Error() string
		Implements (at least one exported)
			 T : error


Package-Level Functions (total 3)

	 func Decode(r io.Reader) (image.Image, error)
		Decode reads a PNG image from r and returns it as an image.Image.
		The type of Image returned depends on the PNG contents.

	 func DecodeConfig(r io.Reader) (image.Config, error)
		DecodeConfig returns the color model and dimensions of a PNG image without
		decoding the entire image.

	 func Encode(w io.Writer, m image.Image) error
		Encode writes the Image m to w in PNG format. Any Image may be
		encoded, but images that are not image.NRGBA might be encoded lossily.


Package-Level Constants (total 4)

	const BestCompression CompressionLevel = -3
	const BestSpeed CompressionLevel = -2
	const DefaultCompression CompressionLevel = 0
	const NoCompression CompressionLevel = -1

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