dchestimage

package

v0.0.0-...-ba0f816 Latest Latest Go to latest Published: Mar 9, 2022 License: MIT, MIT Imports: 10 Imported by: 0

Details

Valid go.mod file

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Redistributable license

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Tagged version

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Stable version

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Repository

github.com/herb-go/herbmodules

Links

Open Source Insights

README ¶

dchestimage

Code from https://github.com/dchest/captcha

Documentation ¶

Index ¶

Variables
func RandomDigits(length int) []byte
type Config
- func (c *Config) MustSavePNG(id string, digits []byte, width, height int) []byte
- func (c *Config) SavePNG(id string, digits []byte, width, height int) ([]byte, error)
type Font
type Image
- func NewImage(c *Config, id string, digits []byte, width, height int) *Image
- func (m *Image) WriteTo(w io.Writer) (int64, error)

Constants ¶

This section is empty.

Variables ¶

View Source

var DefaultConfig = &Config{
	MaxSkew:         0.7,
	CircleCount:     20,
	Font:            DefaultFont,
	BackgroundColor: &color.RGBA{0xFF, 0xFF, 0xFF, 0xFF},
}

View Source

var DefaultFont = &Font{
	Width:     11,
	Height:    18,
	BlackChar: 1,
	Data: [][]byte{
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		{
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		},
	},
}

Functions ¶

func RandomDigits ¶

func RandomDigits(length int) []byte

RandomDigits returns a byte slice of the given length containing pseudorandom numbers in range 0-9. The slice can be used as a captcha solution.

Types ¶

type Config ¶

type Config struct {
	// Maximum absolute skew factor of a single digit.
	MaxSkew float64
	// Number of background circles.
	CircleCount     int
	Font            *Font
	BackgroundColor *color.RGBA
}

func (*Config) MustSavePNG ¶

func (c *Config) MustSavePNG(id string, digits []byte, width, height int) []byte

func (*Config) SavePNG ¶

func (c *Config) SavePNG(id string, digits []byte, width, height int) ([]byte, error)

type Font ¶

type Font struct {
	Width     int
	Height    int
	BlackChar byte
	Data      [][]byte
}

type Image ¶

type Image struct {
	Config *Config
	*image.Paletted
	// contains filtered or unexported fields
}

func NewImage ¶

func NewImage(c *Config, id string, digits []byte, width, height int) *Image

NewImage returns a new captcha image of the given width and height with the given digits, where each digit must be in range 0-9.

func (*Image) WriteTo ¶

func (m *Image) WriteTo(w io.Writer) (int64, error)

WriteTo writes captcha image in PNG format into the given writer.

Source Files ¶

View all Source files

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