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Add NoUpscale option

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This commit is contained in:
Milan Nikolic
2026-06-24 23:39:03 +02:00
parent 92c49290ae
commit 0439a2edde
10 changed files with 95 additions and 20 deletions
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cbconvert.go
+5 -10
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@@ -39,6 +39,8 @@ type Options struct {
Height int
// Best fit for required width and height
Fit bool
// Do not upscale images already smaller than the requested width/height
NoUpscale bool
// Document rendering resolution in DPI (PDF, EPUB, etc.); 0 uses the default
DPI int
// 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
@@ -180,6 +182,7 @@ func (o Options) Args() []string {
num("width", o.Width, def.Width)
num("height", o.Height, def.Height)
flag("fit", o.Fit)
flag("no-upscale", o.NoUpscale)
num("dpi", o.DPI, def.DPI)
str("format", o.Format, def.Format)
str("archive", o.Archive, def.Archive)
@@ -360,11 +363,7 @@ func (c *Converter) Cover(file File) error {
}
if c.Opts.Width > 0 || c.Opts.Height > 0 {
if c.Opts.Fit {
cover = fit(cover, c.Opts.Width, c.Opts.Height, filters[c.Opts.Filter])
} else {
cover = resize(cover, c.Opts.Width, c.Opts.Height, filters[c.Opts.Filter])
}
cover = c.resizeFit(cover)
}
ext := c.Opts.Format
@@ -409,11 +408,7 @@ func (c *Converter) Thumbnail(file File) error {
}
if c.Opts.Width > 0 || c.Opts.Height > 0 {
if c.Opts.Fit {
cover = fit(cover, c.Opts.Width, c.Opts.Height, filters[c.Opts.Filter])
} else {
cover = resize(cover, c.Opts.Width, c.Opts.Height, filters[c.Opts.Filter])
}
cover = c.resizeFit(cover)
} else {
cover = resize(cover, 256, 0, filters[c.Opts.Filter])
}