go-catprinter/options.go

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2024-09-10 20:45:30 +00:00
package catprinter
import (
"github.com/makeworld-the-better-one/dither/v2"
"log"
)
type PrinterOptions struct {
bestQuality bool
autoRotate bool
dither bool
blackPoint float32
ditherAlgo dither.ErrorDiffusionMatrix
}
// NewOptions creates a new PrinterOptions object with sane defaults.
func NewOptions() *PrinterOptions {
return &PrinterOptions{
bestQuality: true,
autoRotate: false,
dither: true,
ditherAlgo: dither.FloydSteinberg,
blackPoint: 0.5,
}
}
// SetBestQuality sets the quality option. Default is true.
// If true, prints slower with higher thermal strength, resulting in a darker image.
// Recommended for self-adhesive paper.
func (o *PrinterOptions) SetBestQuality(best bool) *PrinterOptions {
o.bestQuality = best
return o
}
// BestQuality returns the quality option.
func (o *PrinterOptions) BestQuality() bool {
return o.bestQuality
}
// SetAutoRotate sets the auto rotate option. Default is false.
// If true and the image is landscape, it gets rotated to be printed in higher resolution.
func (o *PrinterOptions) SetAutoRotate(rotate bool) *PrinterOptions {
o.autoRotate = rotate
return o
}
// AutoRotate returns the auto rotate option.
func (o *PrinterOptions) AutoRotate() bool {
return o.autoRotate
}
// SetDither sets the dither option. Default is true.
// If false, dithering is disabled, and the image is converted to black/white and each pixel is printed if less white than BlackPoint.
func (o *PrinterOptions) SetDither(dither bool) *PrinterOptions {
o.dither = dither
return o
}
// Dither returns the dither option.
func (o *PrinterOptions) Dither() bool {
return o.dither
}
// SetDitherAlgo sets the dither algorithm. Default is FloydSteinberg.
func (o *PrinterOptions) SetDitherAlgo(algo dither.ErrorDiffusionMatrix) *PrinterOptions {
o.ditherAlgo = algo
return o
}
// DitherAlgo returns the dither algorithm.
func (o *PrinterOptions) DitherAlgo() dither.ErrorDiffusionMatrix {
return o.ditherAlgo
}
// SetBlackPoint sets the black point. Default is 0.5.
// If 0.5, a gray pixel will be printed as black if it's less than 50% white. Only effective if Dither is disabled.
func (o *PrinterOptions) SetBlackPoint(bp float32) *PrinterOptions {
if bp < 0 || bp > 1 {
log.Panic("Invalid black point value. Must be between 0 and 1.")
}
o.blackPoint = bp
return o
}
// BlackPoint returns the black point.
func (o *PrinterOptions) BlackPoint() float32 {
return o.blackPoint
}