goimage

README

MoGo Image

Documentation

Index

• Constants
• func ColsFilteredColor(img image.Image, c ...color.Color) []int
• func ColumnsFilter(img image.Image, tolerance float64, want ...color.Color) []uint
• func CropImage(img image.Image, retain image.Rectangle) (image.Image, error)
• func CropImageColor(img image.Image, tolerance float64, remove ...color.Color) (image.Image, error)
• func CropImageColorCaption(img image.Image, paddingPct, tolerance float64, remove ...color.Color) (image.Image, error)
• func DecodeWebpRGBA(r io.Reader) (image.Image, string, error)
• func IsImageExt(imagePath string) bool
• func ReadImageAny(location string) (image.Image, string, error)
• func ReadImageDimensions(imagePath string) (int, int, error)
• func ReadImageFile(filename string) (image.Image, string, error)
• func ReadImageHTTP(imageURL string) (image.Image, string, error)
• func ReadImages(locations []string) ([]image.Image, error)
• func ResizeFileJPEG(inputFile, outputFile string, outputWidth, outputHeight, quality int) error
• func RowMatch(img image.Image, rowIdx int, tolerance float64, want ...color.Color) bool
• func RowMatchCaption(paddingPct, tolerance float64, wantColorsUnique micolors.ColorsDistance, ...) bool
• func RowsFilter(img image.Image, tolerance float64, want ...color.Color) []uint
• func RowsFilterCaption(img image.Image, paddingPct, tolerance float64, want ...color.Color) []uint
• func RowsFilteredColor(img image.Image, c color.Color, cmore ...color.Color) []int
• func ToPalettedMedianCut(src image.Image) *image.Paletted
• func WriteFileJPEG(filename string, img image.Image, quality int) error
• func WriteFilePNG(filename string, img image.Image) error
• func WriteFileWEBP(filename string, img image.Image, lossless bool, perm os.FileMode) error

Constants

const (
	FileExtensionWebp = ".webp"

	FormatNameJPG  = "jpeg"
	FormatNamePNG  = "png"
	FormatNameWEBP = "webp"
)

const (
	JPEGQualityDefault int = 80
	JPEGQualityMax     int = 100
)

Functions

func ColsFilteredColor

func ColsFilteredColor(img image.Image, c ...color.Color) []int

func ColumnsFilter

func ColumnsFilter(img image.Image, tolerance float64, want ...color.Color) []uint

ColumnsFilter returns a list of column indexes that matches the wanted colors within the provided tolerane.

func CropImage

func CropImage(img image.Image, retain image.Rectangle) (image.Image, error)

CropImage takes an image and crops it to the specified rectangle. `CropImage` is from: https://stackoverflow.com/a/63256403.

func CropImageColor

func CropImageColor(img image.Image, tolerance float64, remove ...color.Color) (image.Image, error)

func CropImageColorCaption

func CropImageColorCaption(img image.Image, paddingPct, tolerance float64, remove ...color.Color) (image.Image, error)

func DecodeWebpRGBA

func DecodeWebpRGBA(r io.Reader) (image.Image, string, error)

func IsImageExt

func IsImageExt(imagePath string) bool

func ReadImageAny

func ReadImageAny(location string) (image.Image, string, error)

func ReadImageDimensions

func ReadImageDimensions(imagePath string) (int, int, error)

func ReadImageFile

func ReadImageFile(filename string) (image.Image, string, error)

func ReadImageHTTP

func ReadImageHTTP(imageURL string) (image.Image, string, error)

func ReadImages

func ReadImages(locations []string) ([]image.Image, error)

func ResizeFileJPEG

func ResizeFileJPEG(inputFile, outputFile string, outputWidth, outputHeight, quality int) error

func RowMatch

func RowMatch(img image.Image, rowIdx int, tolerance float64, want ...color.Color) bool

RowMatch checks to see if an image row matches the want colors.

func RowMatchCaption

func RowMatchCaption(paddingPct, tolerance float64, wantColorsUnique micolors.ColorsDistance, candidate []color.Color) bool

RowCaptionMatch matches a row with a caption. paddingPct is what is considered for matching. padding is left or right. Padding 0.5 or greater means matching the entire row. Padding <= 0 means no matching is necessary to succeed. Negative padding is not supported and converted to 0.

func RowsFilter

func RowsFilter(img image.Image, tolerance float64, want ...color.Color) []uint

RowsFilter returns a list of row indexes that matches the wanted colors within the provided tolerane.

func RowsFilterCaption

func RowsFilterCaption(img image.Image, paddingPct, tolerance float64, want ...color.Color) []uint

RowsFilterCaption returns a list of column indexes that matches the wanted colors within the provided tolerane.

func RowsFilteredColor

func RowsFilteredColor(img image.Image, c color.Color, cmore ...color.Color) []int

func ToPalettedMedianCut

func ToPalettedMedianCut(src image.Image) *image.Paletted

func WriteFileJPEG

func WriteFileJPEG(filename string, img image.Image, quality int) error

func WriteFilePNG

func WriteFilePNG(filename string, img image.Image) error

func WriteFileWEBP

func WriteFileWEBP(filename string, img image.Image, lossless bool, perm os.FileMode) error