73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
// Package collage makes a pic collage
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package collage
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import (
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"errors"
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"fmt"
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"image"
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"io"
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"io/fs"
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)
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type Dimension struct {
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Width uint `json:"width"`
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Height uint `json:"height"`
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}
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type Point struct {
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X uint `json:"x"`
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Y uint `json:"y"`
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}
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type Rectangle struct {
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Start Point `json:"start"`
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End Point `json:"end"`
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}
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func (r Rectangle) ToImgRect() image.Rectangle {
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return image.Rectangle{
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Min: image.Point{int(r.Start.X), int(r.Start.Y)},
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Max: image.Point{int(r.End.X), int(r.End.Y)},
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}
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}
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type Request struct {
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BackgroundImage string `json:"background_image"`
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Aspect Dimension `json:"aspect"`
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Dimension Dimension `json:"dimension"`
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Photos []struct {
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ImageName string `json:"image"`
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Crop Rectangle `json:"crop"`
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Frame Rectangle `json:"frame"`
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} `json:"photos"`
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}
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func Make(req Request, source fs.FS, output io.Writer) {
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rec := image.Rect(0, 0, int(req.Aspect.Width), int(req.Aspect.Height))
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canvas := image.NewRGBA64(rec)
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for photo := range req.Photos {
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fmt.Println(photo)
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}
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fmt.Println(canvas)
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}
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type HasSubImage interface {
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SubImage(r image.Rectangle) image.Image
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}
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func Crop(img image.Image, r Rectangle) (image.Image, error) {
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if imgHS, ok := img.(HasSubImage); ok {
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return imgHS.SubImage(r.ToImgRect()), nil
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}
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return nil, errors.New("image does not support cropping")
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}
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func GetImage(source fs.FS, imageName string) (image.Image, error) {
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imgF, err := source.Open(imageName)
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if err != nil {
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return nil, err
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}
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img, _, err := image.Decode(imgF)
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return img, err
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}
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