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91 lines
1.7 KiB
91 lines
1.7 KiB
package pipelines
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import (
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"errors"
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"fmt"
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"image"
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"github.com/disintegration/imaging"
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)
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type IExecutableStep interface {
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Execute(src image.Image) (image.Image, error)
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}
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// Resize image
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type ResizeImageStep struct {
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Step
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Options struct {
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Width int `json:"width"`
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Height int `json:"height"`
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Upscale bool `json:"upscale"`
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} `json:"options"`
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}
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func (s ResizeImageStep) Execute(src image.Image) (image.Image, error) {
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src = imaging.Resize(src, s.Options.Width, s.Options.Height, imaging.Linear)
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return src, nil
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}
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// Rotate image
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type RotateImageStep struct {
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Step
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Options struct {
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Angle float64 `json:"angle"`
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} `json:"options"`
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}
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func (s RotateImageStep) Execute(src image.Image) (image.Image, error) {
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src = imaging.Rotate(src, s.Options.Angle, image.Black)
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return src, nil
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}
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// Flip image
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type FlipImageStep struct {
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Step
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Options struct {
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Direction string `json:"direction"`
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} `json:"options"`
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}
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func (s FlipImageStep) Execute(src image.Image) (image.Image, error) {
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switch s.Options.Direction {
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case "h":
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src = imaging.FlipH(src)
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case "v":
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src = imaging.FlipH(src)
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default:
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return src, errors.New(fmt.Sprintf("invalid flip direction: %s", s.Options.Direction))
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}
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return src, nil
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}
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// Grayscale image
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type GrayscaleImageStep struct {
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Step
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}
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func (s GrayscaleImageStep) Execute(src image.Image) (image.Image, error) {
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src = imaging.Grayscale(src)
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return src, nil
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}
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// Fit image
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type FitImageStep struct {
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Step
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Options struct {
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Height int `json:"height"`
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Width int `json:"width"`
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} `json:"options"`
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}
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func (s FitImageStep) Execute(src image.Image) (image.Image, error) {
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src = imaging.Fit(src, s.Options.Width, s.Options.Height, imaging.Lanczos)
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return src, nil
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}
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