utils

func ComparePixelsExact ¶

func ComparePixelsExact(imageA *image.RGBA, imageB *image.RGBA, globalBounds image.Rectangle) (float64, error)

ComparePixelsExact naively compares two images by checking how many of the pixels between them are identical. It returns a float that ranges between 0 (no matches) and 1 (identical pictures)

func ComparePixelsWeighted ¶

func ComparePixelsWeighted(imageA *image.RGBA, imageB *image.RGBA, globalBounds image.Rectangle) (float64, error)

func FillSpace ¶

func FillSpace(img *image.RGBA, nonTransparentImageBounds image.Rectangle)

FillSpace fills everything in img that doesn't fall within nonTransparentImageBounds with the scaled out edges and corners of img when masked by nonTransparentImageBounds

func HorizontalLine ¶

func HorizontalLine(img *image.RGBA, xStart int, xEnd int, y int, c color.Color)

HorizontalLine draws a horizontal line onto an image

func InRange ¶

func InRange(number1 float64, number2 float64, maxRange float64) bool

InRange returns wether two numbers are up to a maximum range away from each other

func PointCollides ¶

func PointCollides(p image.Point, r image.Rectangle) bool

PointCollides returns true if p collides with r

func ReadImage ¶

func ReadImage(path string) (img image.Image, err error)

ReadImage Takes the path to an image file in the file system and returns the decoded image

func ReadImageFromBytes ¶

func ReadImageFromBytes(imageBytes []byte) (img image.Image, err error)

ReadImageFromBytes that a byte slice and attempts to decode it into an image

func ReadImageFromReader ¶

func ReadImageFromReader(reader io.Reader) (img image.Image, err error)

ReadImageFromReader takes an io.Reader and attempts to decode it into an image

func Rectangle ¶

func Rectangle(img *image.RGBA, rectangle image.Rectangle, c color.Color, fillColor color.Color)

Rectangle draws a rectangle onto an image

func RectanglesCollide ¶

func RectanglesCollide(r1 image.Rectangle, r2 image.Rectangle) bool

RectanglesCollide returns true if r1 and r2 collide

func Scale ¶

func Scale(img *image.RGBA, bounds image.Rectangle, interpolator draw.Interpolator) image.Image

Scale scales a given image to the desired dimensions

func VerticalLine ¶

func VerticalLine(img *image.RGBA, yStart int, yEnd int, x int, c color.Color)

VerticalLine draws a vertical line onto an image

func WriteFile ¶

func WriteFile(filePath string, reader io.Reader) error

WriteFile writes data from an io.Reader to filePath

func WriteImage ¶

func WriteImage(img image.Image, writer io.Writer, extension string) (err error)

WriteImage encodes an image as either PNG or JPEG according to extension and writes it to writer. Note: extension needs to be prepended with a dot.

func WriteImageToFile ¶

func WriteImageToFile(img image.Image, filePath string) error

WriteImageToFile encodes an image as either PNG or JPEG according to the extension of filePath and writes it to filePath.