imageprocessorcommon

Documentation

Index

• Constants
• Variables
• type ImageFormat
  • func ParseImageFormat(formatString string) ImageFormat
  • func (ifmt ImageFormat) String() string
• type ImageProcessor

Constants

const (
	// ImageFormatUndefined is a reserved ImageFormat for cases when it's undefined.
	// So if anybody will have an ImageFormat with zero-value (not defined, yet) it won't receive
	// a mis-leading value like ImageFormatJPEG.
	ImageFormatUndefined = ImageFormat(iota)

	// ImageFormatJPEG is an ImageFormat for JPEGs
	ImageFormatJPEG

	// ImageFormatOther is an ImageFormat for all image formats not listed here in this enumeration
	ImageFormatOther
)

Variables

var (
	ErrInvalidSize = errors.New(`invalid size`)
)

Types

type ImageFormat

type ImageFormat uint

ImageFormat is an enumeration data-type for image formats

func ParseImageFormat

func ParseImageFormat(formatString string) ImageFormat

ParseImageFormat parses a string with an image format to ImageFormat.

Expected values: "JPEG"

func (ImageFormat) String

func (ifmt ImageFormat) String() string

String just implements Stringer for nicer logging

type ImageProcessor

type ImageProcessor interface {
	// Resize reads an image from `in` and writes a resized image to `out`
	// (new image size: `toWidth`x`toHeight`).
	//
	// It returns image format and (if occured:) an error.
	Resize(in io.Reader, out io.Writer, toWidth, toHeight uint) (ImageFormat, error)
}

ImageProcessor is a tool to manipulate images