Module: stdgo.image.png

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Overview

Index

• Constants

• class Png

• function decode(_r:stdgo._internal.io.Reader):stdgo.Tuple<stdgo._internal.image.Image, stdgo.Error>

• function decodeConfig(_r:stdgo._internal.io.Reader):stdgo.Tuple<stdgo._internal.image.Config, stdgo.Error>

• function encode(_w:stdgo._internal.io.Writer, _m:stdgo._internal.image.Image):stdgo.Error

• typedef CompressionLevel

• typedef EncoderBuffer

• typedef EncoderBufferPool

• typedef FormatError

• typedef T_opaquer

• typedef UnsupportedError

• abstract T_interlaceScan

• abstract T_decoder

• abstract Encoder

• abstract T_encoder

Constants

import stdgo.image.png.Png

final bestCompression:stdgo.image.png.CompressionLevel = stdgo._internal.image.png.Png_bestCompression.bestCompression

final bestSpeed:stdgo.image.png.CompressionLevel = stdgo._internal.image.png.Png_bestSpeed.bestSpeed

final defaultCompression:stdgo.image.png.CompressionLevel = stdgo._internal.image.png.Png_defaultCompression.defaultCompression

final noCompression:stdgo.image.png.CompressionLevel = stdgo._internal.image.png.Png_noCompression.noCompression

Classes

import stdgo.image.png.*

class Png

Package png implements a PNG image decoder and encoder.

The PNG specification is at https://www.w3.org/TR/PNG/.

Png function decode

function decode(_r:stdgo._internal.io.Reader):stdgo.Tuple<stdgo._internal.image.Image, stdgo.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.

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Png function decodeConfig

function decodeConfig(_r:stdgo._internal.io.Reader):stdgo.Tuple<stdgo._internal.image.Config, stdgo.Error>

DecodeConfig returns the color model and dimensions of a PNG image without
        decoding the entire image.

(view code)

Png function encode

function encode(_w:stdgo._internal.io.Writer, _m:stdgo._internal.image.Image):stdgo.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.

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Typedefs

import stdgo.image.png.*

typedef CompressionLevel

typedef CompressionLevel = stdgo._internal.image.png.CompressionLevel;

typedef EncoderBuffer

typedef EncoderBuffer = stdgo._internal.image.png.EncoderBuffer;

typedef EncoderBufferPool

typedef EncoderBufferPool = stdgo._internal.image.png.EncoderBufferPool;

typedef FormatError

typedef FormatError = stdgo._internal.image.png.FormatError;

typedef T_opaquer

typedef T_opaquer = stdgo._internal.image.png.T_opaquer;

typedef UnsupportedError

typedef UnsupportedError = stdgo._internal.image.png.UnsupportedError;

Abstracts

abstract T_interlaceScan

(view file containing code)

abstract T_decoder

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abstract Encoder

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abstract T_encoder

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