niki/vendor/github.com/brianvoe/gofakeit/v6/image.go

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2024-04-26 19:30:35 +00:00
package gofakeit
import (
"bytes"
"errors"
img "image"
imgCol "image/color"
"image/jpeg"
"image/png"
"math/rand"
"strconv"
)
// ImageURL will generate a random Image Based Upon Height And Width. https://picsum.photos/
func ImageURL(width int, height int) string { return imageURL(globalFaker.Rand, width, height) }
// ImageURL will generate a random Image Based Upon Height And Width. https://picsum.photos/
func (f *Faker) ImageURL(width int, height int) string { return imageURL(f.Rand, width, height) }
func imageURL(r *rand.Rand, width int, height int) string {
return "https://picsum.photos/" + strconv.Itoa(width) + "/" + strconv.Itoa(height)
}
// Image generates a random rgba image
func Image(width int, height int) *img.RGBA { return image(globalFaker.Rand, width, height) }
// Image generates a random rgba image
func (f *Faker) Image(width int, height int) *img.RGBA { return image(f.Rand, width, height) }
func image(r *rand.Rand, width int, height int) *img.RGBA {
upLeft := img.Point{0, 0}
lowRight := img.Point{width, height}
img := img.NewRGBA(img.Rectangle{upLeft, lowRight})
// Set color for each pixel
for x := 0; x < width; x++ {
for y := 0; y < height; y++ {
img.Set(x, y, imgCol.RGBA{uint8(number(r, 0, 255)), uint8(number(r, 0, 255)), uint8(number(r, 0, 255)), 0xff})
}
}
return img
}
// ImageJpeg generates a random rgba jpeg image
func ImageJpeg(width int, height int) []byte { return imageJpeg(globalFaker.Rand, width, height) }
// ImageJpeg generates a random rgba jpeg image
func (f *Faker) ImageJpeg(width int, height int) []byte { return imageJpeg(f.Rand, width, height) }
func imageJpeg(r *rand.Rand, width int, height int) []byte {
buf := new(bytes.Buffer)
jpeg.Encode(buf, image(r, width, height), nil)
return buf.Bytes()
}
// ImagePng generates a random rgba png image
func ImagePng(width int, height int) []byte { return imagePng(globalFaker.Rand, width, height) }
// ImagePng generates a random rgba png image
func (f *Faker) ImagePng(width int, height int) []byte { return imagePng(f.Rand, width, height) }
func imagePng(r *rand.Rand, width int, height int) []byte {
buf := new(bytes.Buffer)
png.Encode(buf, image(r, width, height))
return buf.Bytes()
}
func addImageLookup() {
AddFuncLookup("imageurl", Info{
Display: "Image URL",
Category: "image",
Description: "Web address pointing to an image file that can be accessed and displayed online",
Example: "https://picsum.photos/500/500",
Output: "string",
Params: []Param{
{Field: "width", Display: "Width", Type: "int", Default: "500", Description: "Image width in px"},
{Field: "height", Display: "Height", Type: "int", Default: "500", Description: "Image height in px"},
},
Generate: func(r *rand.Rand, m *MapParams, info *Info) (any, error) {
width, err := info.GetInt(m, "width")
if err != nil {
return nil, err
}
if width < 10 || width >= 1000 {
return nil, errors.New("invalid image width, must be greater than 10, less than 1000")
}
height, err := info.GetInt(m, "height")
if err != nil {
return nil, err
}
if height < 10 || height >= 1000 {
return nil, errors.New("invalid image height, must be greater than 10, less than 1000")
}
return imageURL(r, width, height), nil
},
})
AddFuncLookup("imagejpeg", Info{
Display: "Image JPEG",
Category: "image",
Description: "Image file format known for its efficient compression and compatibility",
Example: "file.jpeg - bytes",
Output: "[]byte",
ContentType: "image/jpeg",
Params: []Param{
{Field: "width", Display: "Width", Type: "int", Default: "500", Description: "Image width in px"},
{Field: "height", Display: "Height", Type: "int", Default: "500", Description: "Image height in px"},
},
Generate: func(r *rand.Rand, m *MapParams, info *Info) (any, error) {
width, err := info.GetInt(m, "width")
if err != nil {
return nil, err
}
if width < 10 || width >= 1000 {
return nil, errors.New("invalid image width, must be greater than 10, less than 1000")
}
height, err := info.GetInt(m, "height")
if err != nil {
return nil, err
}
if height < 10 || height >= 1000 {
return nil, errors.New("invalid image height, must be greater than 10, less than 1000")
}
return imageJpeg(r, width, height), nil
},
})
AddFuncLookup("imagepng", Info{
Display: "Image PNG",
Category: "image",
Description: "Image file format known for its lossless compression and support for transparency",
Example: "file.png - bytes",
Output: "[]byte",
ContentType: "image/png",
Params: []Param{
{Field: "width", Display: "Width", Type: "int", Default: "500", Description: "Image width in px"},
{Field: "height", Display: "Height", Type: "int", Default: "500", Description: "Image height in px"},
},
Generate: func(r *rand.Rand, m *MapParams, info *Info) (any, error) {
width, err := info.GetInt(m, "width")
if err != nil {
return nil, err
}
if width < 10 || width >= 1000 {
return nil, errors.New("invalid image width, must be greater than 10, less than 1000")
}
height, err := info.GetInt(m, "height")
if err != nil {
return nil, err
}
if height < 10 || height >= 1000 {
return nil, errors.New("invalid image height, must be greater than 10, less than 1000")
}
return imagePng(r, width, height), nil
},
})
}