offimg

Documentation

Index

• Constants
• func WriteImage(img image.Image, w io.Writer) error
• type BitmapColors
• type BitmapFileHeader
• type BitmapInfoHeader
• type CropSpec
  • func (c *CropSpec) Crop(img image.Image, asp float64) (image.Image, error)
  • func (c *CropSpec) CropResize(img image.Image, width uint, height uint) (image.Image, error)
• type RGBQuad
  • func Black() RGBQuad
  • func White() RGBQuad

Constants

const Height = 240

const Width = 400

Functions

func WriteImage

func WriteImage(img image.Image, w io.Writer) error

Types

type BitmapColors

type BitmapColors []RGBQuad

type BitmapFileHeader

type BitmapFileHeader struct {
	BfType      [2]byte
	BfSize      uint32
	BfReserved1 uint16
	BfReserved2 uint16
	BfOffBits   uint32
}

type BitmapInfoHeader

type BitmapInfoHeader struct {
	BfSize           uint32
	BitWidth         uint32
	BitHeight        uint32
	BiPlanes         uint16
	BiBitCount       uint16
	BiCompressing    uint32
	BiSizeImage      uint32
	BiXPixelPerMeter uint32
	BiYPixelPerMeter uint32
	BiClrUsed        uint32
	BiClrImportant   uint32
}

type CropSpec

type CropSpec struct {
	DefinedPtOne image.Point
	DefinedPtTwo image.Point
}

func (*CropSpec) Crop

func (c *CropSpec) Crop(img image.Image, asp float64) (image.Image, error)

func (*CropSpec) CropResize

func (c *CropSpec) CropResize(img image.Image, width uint, height uint) (image.Image, error)

type RGBQuad

type RGBQuad struct {
	Blue, Green, Red, Reserved uint8
}

func Black

func Black() RGBQuad

func White

func White() RGBQuad