37 lines
886 B
Go
37 lines
886 B
Go
package goeffects
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// Package copied from https://github.com/markdaws/go-effects
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// Pipeline allows multiple effects to be composed together easily
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type Pipeline struct {
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effects []item
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}
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type item struct {
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effect Effect
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callback func(*Image)
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}
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// Add adds an effect to the pipeline
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func (p *Pipeline) Add(e Effect, callback func(*Image)) {
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p.effects = append(p.effects, item{effect: e, callback: callback})
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}
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// Run executes all of the effects in the order they were passed to the Add function
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// on the input image and returns the results.
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func (p *Pipeline) Run(img *Image, numRoutines int) (*Image, error) {
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currentImg := img
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for _, item := range p.effects {
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outImg, err := item.effect.Apply(currentImg, numRoutines)
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if err != nil {
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return nil, err
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}
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if item.callback != nil {
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item.callback(outImg)
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}
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currentImg = outImg
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}
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return currentImg, nil
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}
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