util

package

v2.0.2-50+incompatible Latest Latest Go to latest Published: Sep 3, 2015 License: MIT Imports: 17 Imported by: 12

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var R = (255 * math.Log10(2)) / (math.Log10(255))

func ConvertImage(image *image.RGBA) []byte

func GetLEDConnection() (io.ReadWriteCloser, error)

func GetLEDConnectionAtRate(baudRate int) (io.ReadWriteCloser, error)

func ResolveImagePath(relativePath string) string

resolves a relative image path to a fully qialified path.

func SetImageDir(newDir string)

the directory used to resolve the

func WriteLEDMatrix(image *image.RGBA, s io.ReadWriteCloser)

Write an image into the led matrix

type AnimatedImage struct {
	// contains filtered or unexported fields
}

func LoadGif(src string) *AnimatedImage

func (i *AnimatedImage) GetNextFrame() *image.RGBA

func (i *AnimatedImage) GetPositionFrame(position float64, blend bool) *image.RGBA

GetPositionFrame returns the frame corresponding to the position given 0....1

type Image interface {
	GetNextFrame() *image.RGBA
	GetPositionFrame(position float64, blend bool) *image.RGBA
}

func LoadImage(src string) Image

func LoadJpeg(src string) Image

func LoadPng(src string) Image

type MaskImage struct {
	Image Image
}

MaskImage wraps an image so that the red level is used as the transparency.

It allows animated gifs to be used as masks, with 255 levels of alpha.

func (i *MaskImage) GetNextFrame() *image.RGBA

func (i *MaskImage) GetPositionFrame(position float64, blend bool) *image.RGBA

type SingleImage struct {
	// contains filtered or unexported fields
}

func NewSingleImage(frame *image.RGBA) *SingleImage

func NewSingleImageConvert(frame image.Image) *SingleImage

func (i *SingleImage) GetNextFrame() *image.RGBA

func (i *SingleImage) GetPositionFrame(position float64, blend bool) *image.RGBA