imutil

package

v0.0.0-...-51c8454 Latest Latest Go to latest Published: Apr 25, 2024 License: MIT Imports: 10 Imported by: 0

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Repository

github.com/jo-m/trainbot

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Documentation ¶

Overview ¶

Package imutil contains various internal image utilities.

Index ¶

func Copy(in image.Image) (ret image.Image)
func Dump(path string, img image.Image) error
func DumpGIF(path string, img *gif.GIF) error
func DumpJPEG(path string, img image.Image, quality int) error
func Load(path string) (image.Image, error)
func NewYuv420(buf []byte, w, h int) image.Image
func RandGray(seed int64, w, h int) *image.Gray
func RandRGBA(seed int64, w, h int) *image.RGBA
func Sub(img image.Image, r image.Rectangle) (image.Image, error)
func ToGray(img image.Image) *image.Gray
func ToRGBA(img image.Image) *image.RGBA
type YCbCr

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func Copy ¶

func Copy(in image.Image) (ret image.Image)

Copy creates a deep copy of an image (copies underlying buffer).

func Dump ¶

func Dump(path string, img image.Image) error

Dump dumps an image to a file. Format is determined by file ending. PNG and JPG are supported.

func DumpGIF ¶

func DumpGIF(path string, img *gif.GIF) error

DumpGIF dumps a GIF image to a file.

func DumpJPEG ¶

func DumpJPEG(path string, img image.Image, quality int) error

DumpJPEG dumps a JPEG to a file with a given quality.

func Load ¶

func Load(path string) (image.Image, error)

Load tries to load an image from a file.

func NewYuv420 ¶

func NewYuv420(buf []byte, w, h int) image.Image

NewYuv420 creates a new image.Image from a raw Yuv420p buffer. The returned image will reference buf and no data is copied.

func RandGray ¶

func RandGray(seed int64, w, h int) *image.Gray

RandGray creates a random grayscale image with a given seed.

func RandRGBA ¶

func RandRGBA(seed int64, w, h int) *image.RGBA

RandRGBA creates a random RGBA image with a given seed.

func Sub ¶

func Sub(img image.Image, r image.Rectangle) (image.Image, error)

Sub tries to call SubImage on the given image.

func ToGray ¶

func ToGray(img image.Image) *image.Gray

ToGray returns a new copy of img, converted to grayscale, with the origin of its bounds reset to 0.

func ToRGBA ¶

func ToRGBA(img image.Image) *image.RGBA

ToRGBA returns a new copy of img, converted to RGBA, with the origin of its bounds reset to 0.

Types ¶

type YCbCr ¶

type YCbCr struct {
	Pix  []byte
	Rect image.Rectangle
}

YCbCr is a raw YCbCr image.

func (*YCbCr) At ¶

func (i *YCbCr) At(x, y int) color.Color

At implements image.Image.

func (*YCbCr) Bounds ¶

func (i *YCbCr) Bounds() image.Rectangle

Bounds implements image.Image.

func (*YCbCr) ColorModel ¶

func (i *YCbCr) ColorModel() color.Model

ColorModel implements image.Image.

Source Files ¶

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