README
¶
Copy from https://github.com/golang/go/tree/master/src/image/jpeg @ go1.9.4
Features
- Add
quality,DecodeWithQualitymethod.
Documentation
¶
Overview ¶
Package jpeg implements a JPEG image decoder and encoder.
JPEG is defined in ITU-T T.81: http://www.w3.org/Graphics/JPEG/itu-t81.pdf.
Index ¶
- Constants
- func Decode(r io.Reader) (image.Image, error)
- func DecodeConfig(r io.Reader) (image.Config, error)
- func DecodeWithQuality(r io.Reader) (image.Image, int, error)
- func Encode(w io.Writer, m image.Image, o *Options) error
- type FormatError
- type Options
- type Readerdeprecated
- type UnsupportedError
Constants ¶
const DefaultQuality = 75
DefaultQuality is the default quality encoding parameter.
Variables ¶
This section is empty.
Functions ¶
func DecodeConfig ¶
DecodeConfig returns the color model and dimensions of a JPEG image without decoding the entire image.
func DecodeWithQuality ¶
DecodeWithQuality reads a JPEG image from r and returns it as an image.Image and Quality.
Types ¶
type FormatError ¶
type FormatError string
A FormatError reports that the input is not a valid JPEG.
func (FormatError) Error ¶
func (e FormatError) Error() string
type Options ¶
type Options struct {
Quality int
}
Options are the encoding parameters. Quality ranges from 1 to 100 inclusive, higher is better.
type Reader
deprecated
type Reader interface {
io.ByteReader
io.Reader
}
Deprecated: Reader is deprecated.
type UnsupportedError ¶
type UnsupportedError string
An UnsupportedError reports that the input uses a valid but unimplemented JPEG feature.
func (UnsupportedError) Error ¶
func (e UnsupportedError) Error() string
Source Files