Package png
import "image/png"
Package png implements a PNG image decoder and encoder.
The PNG specification is at http://www.libpng.org/pub/png/spec/1.2/PNG-Contents.html
Package files
reader.go writer.gofunc Decode
func Decode(r io.Reader) (image.Image, os.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
func DecodeConfig(r io.Reader) (image.Config, os.Error)
DecodeConfig returns the color model and dimensions of a PNG image without decoding the entire image.
func Encode
func Encode(w io.Writer, m image.Image) os.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.
type FormatError
A FormatError reports that the input is not a valid PNG.
type FormatError string
func (FormatError) String
func (e FormatError) String() string
type IDATDecodingError
An IDATDecodingError wraps an inner error (such as a ZLIB decoding error) encountered while processing an IDAT chunk.
type IDATDecodingError struct {
Err os.Error
}
func (IDATDecodingError) String
func (e IDATDecodingError) String() string
type UnsupportedError
An UnsupportedError reports that the input uses a valid but unimplemented PNG feature.
type UnsupportedError string
func (UnsupportedError) String
func (e UnsupportedError) String() string