mirror of
https://github.com/celogeek/go-comic-converter.git
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62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package epubimageprocessor
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import (
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"fmt"
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"image"
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"image/color"
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"image/draw"
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"github.com/celogeek/go-comic-converter/v2/pkg/epubimagefilters"
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"github.com/celogeek/go-comic-converter/v2/pkg/epubzip"
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"github.com/disintegration/gift"
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)
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type CoverTitleDataOptions struct {
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Src image.Image
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Name string
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Text string
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Align string
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PctWidth int
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PctMargin int
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MaxFontSize int
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BorderSize int
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}
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// create a title page with the cover
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func (e *EPUBImageProcessor) CoverTitleData(o *CoverTitleDataOptions) (*epubzip.EPUBZipImage, error) {
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// Create a blur version of the cover
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g := gift.New(epubimagefilters.CoverTitle(o.Text, o.Align, o.PctWidth, o.PctMargin, o.MaxFontSize, o.BorderSize))
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var dst draw.Image
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if o.Name == "cover" && e.options.Image.GrayScale {
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// 16 shade of gray
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dst = image.NewPaletted(o.Src.Bounds(), color.Palette{
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color.Gray{0x00},
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color.Gray{0x11},
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color.Gray{0x22},
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color.Gray{0x33},
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color.Gray{0x44},
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color.Gray{0x55},
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color.Gray{0x66},
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color.Gray{0x77},
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color.Gray{0x88},
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color.Gray{0x99},
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color.Gray{0xAA},
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color.Gray{0xBB},
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color.Gray{0xCC},
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color.Gray{0xDD},
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color.Gray{0xEE},
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color.Gray{0xFF},
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})
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} else {
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dst = e.createImage(o.Src, g.Bounds(o.Src.Bounds()))
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}
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g.Draw(dst, o.Src)
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return epubzip.CompressImage(
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fmt.Sprintf("OEBPS/Images/%s.%s", o.Name, e.options.Image.Format),
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e.options.Image.Format,
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dst,
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e.options.Image.Quality,
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)
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}
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