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auto rotate if src width > src height

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This commit is contained in:
Celogeek 2023-04-26 15:58:42 +02:00
parent d0d9af7f9b
commit b268521494
Signed by: celogeek
SSH Key Fingerprint: SHA256:njNJLzoLQdbV9PC6ehcruRb0QnEgxABoCYZ+0+aUIYc
2 changed files with 5 additions and 19 deletions
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22
internal/epub/filters/epub_filters_autorotate.go
View File

@ -7,29 +7,15 @@ import (
"github.com/disintegration/gift" "github.com/disintegration/gift"
) )
func AutoRotate(viewWidth, viewHeight int) gift.Filter { func AutoRotate() gift.Filter {
return &autoRotateFilter{ return &autoRotateFilter{}
viewWidth, viewHeight,
}
} }
type autoRotateFilter struct { type autoRotateFilter struct {
viewWidth, viewHeight int
}
func (p *autoRotateFilter) needRotate(srcBounds image.Rectangle) bool {
width, height := srcBounds.Dx(), srcBounds.Dy()
if width <= height {
return false
}
if width <= p.viewWidth && height <= p.viewHeight {
return false
}
return true
} }
func (p *autoRotateFilter) Bounds(srcBounds image.Rectangle) (dstBounds image.Rectangle) { func (p *autoRotateFilter) Bounds(srcBounds image.Rectangle) (dstBounds image.Rectangle) {
if p.needRotate(srcBounds) { if srcBounds.Dx() > srcBounds.Dy() {
dstBounds = gift.Rotate90().Bounds(srcBounds) dstBounds = gift.Rotate90().Bounds(srcBounds)
} else { } else {
dstBounds = srcBounds dstBounds = srcBounds
@ -38,7 +24,7 @@ func (p *autoRotateFilter) Bounds(srcBounds image.Rectangle) (dstBounds image.Re
} }
func (p *autoRotateFilter) Draw(dst draw.Image, src image.Image, options *gift.Options) { func (p *autoRotateFilter) Draw(dst draw.Image, src image.Image, options *gift.Options) {
if p.needRotate(src.Bounds()) { if src.Bounds().Dx() > src.Bounds().Dy() {
gift.Rotate90().Draw(dst, src, options) gift.Rotate90().Draw(dst, src, options)
} else { } else {
draw.Draw(dst, dst.Bounds(), src, src.Bounds().Min, draw.Src) draw.Draw(dst, dst.Bounds(), src, src.Bounds().Min, draw.Src)

2
internal/epub/image/epub_image_filters.go
View File

@ -10,7 +10,7 @@ func NewGift(options *Options) *gift.GIFT {
g.SetParallelization(false) g.SetParallelization(false)
if options.AutoRotate { if options.AutoRotate {
g.Add(epubfilters.AutoRotate(options.ViewWidth, options.ViewHeight)) g.Add(epubfilters.AutoRotate())
} }
if options.Contrast != 0 { if options.Contrast != 0 {
g.Add(gift.Contrast(float32(options.Contrast))) g.Add(gift.Contrast(float32(options.Contrast)))