2019-06-04 12:16:27 +09:00

205 lines
5.7 KiB
Go

package arn
import (
"bytes"
"image"
"path"
"time"
"github.com/akyoto/imageserver"
)
const (
// AnimeImageLargeWidth is the minimum width in pixels of a large anime image.
AnimeImageLargeWidth = 250
// AnimeImageLargeHeight is the minimum height in pixels of a large anime image.
AnimeImageLargeHeight = 350
// AnimeImageMediumWidth is the minimum width in pixels of a medium anime image.
AnimeImageMediumWidth = 142
// AnimeImageMediumHeight is the minimum height in pixels of a medium anime image.
AnimeImageMediumHeight = 200
// AnimeImageSmallWidth is the minimum width in pixels of a small anime image.
AnimeImageSmallWidth = 55
// AnimeImageSmallHeight is the minimum height in pixels of a small anime image.
AnimeImageSmallHeight = 78
// AnimeImageWebPQuality is the WebP quality of anime images.
AnimeImageWebPQuality = 70
// AnimeImageJPEGQuality is the JPEG quality of anime images.
AnimeImageJPEGQuality = 70
// AnimeImageQualityBonusLowDPI ...
AnimeImageQualityBonusLowDPI = 10
// AnimeImageQualityBonusLarge ...
AnimeImageQualityBonusLarge = 5
// AnimeImageQualityBonusMedium ...
AnimeImageQualityBonusMedium = 10
// AnimeImageQualityBonusSmall ...
AnimeImageQualityBonusSmall = 10
)
// Define the anime image outputs
var animeImageOutputs = []imageserver.Output{
// Original at full size
&imageserver.OriginalFile{
Directory: path.Join(Root, "images/anime/original/"),
Width: 0,
Height: 0,
Quality: 0,
},
// JPEG - Large
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/large/"),
Width: AnimeImageLargeWidth,
Height: AnimeImageLargeHeight,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusLarge,
},
// JPEG - Medium
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/medium/"),
Width: AnimeImageMediumWidth,
Height: AnimeImageMediumHeight,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusMedium,
},
// JPEG - Small
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/small/"),
Width: AnimeImageSmallWidth,
Height: AnimeImageSmallHeight,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusSmall,
},
// WebP - Large
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/large/"),
Width: AnimeImageLargeWidth,
Height: AnimeImageLargeHeight,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusLarge,
},
// WebP - Medium
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/medium/"),
Width: AnimeImageMediumWidth,
Height: AnimeImageMediumHeight,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusMedium,
},
// WebP - Small
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/small/"),
Width: AnimeImageSmallWidth,
Height: AnimeImageSmallHeight,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusLowDPI + AnimeImageQualityBonusSmall,
},
}
// Define the high DPI anime image outputs
var animeImageOutputsHighDPI = []imageserver.Output{
// JPEG - Large
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/large/"),
Width: AnimeImageLargeWidth * 2,
Height: AnimeImageLargeHeight * 2,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusLarge,
},
// JPEG - Medium
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/medium/"),
Width: AnimeImageMediumWidth * 2,
Height: AnimeImageMediumHeight * 2,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusMedium,
},
// JPEG - Small
&imageserver.JPEGFile{
Directory: path.Join(Root, "images/anime/small/"),
Width: AnimeImageSmallWidth * 2,
Height: AnimeImageSmallHeight * 2,
Quality: AnimeImageJPEGQuality + AnimeImageQualityBonusSmall,
},
// WebP - Large
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/large/"),
Width: AnimeImageLargeWidth * 2,
Height: AnimeImageLargeHeight * 2,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusLarge,
},
// WebP - Medium
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/medium/"),
Width: AnimeImageMediumWidth * 2,
Height: AnimeImageMediumHeight * 2,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusMedium,
},
// WebP - Small
&imageserver.WebPFile{
Directory: path.Join(Root, "images/anime/small/"),
Width: AnimeImageSmallWidth * 2,
Height: AnimeImageSmallHeight * 2,
Quality: AnimeImageWebPQuality + AnimeImageQualityBonusSmall,
},
}
// SetImageBytes accepts a byte buffer that represents an image file and updates the anime image.
func (anime *Anime) SetImageBytes(data []byte) error {
// Decode
img, format, err := image.Decode(bytes.NewReader(data))
if err != nil {
return err
}
return anime.SetImage(&imageserver.MetaImage{
Image: img,
Format: format,
Data: data,
})
}
// SetImage sets the anime image to the given MetaImage.
func (anime *Anime) SetImage(metaImage *imageserver.MetaImage) error {
var lastError error
// Save the different image formats and sizes in low DPI
for _, output := range animeImageOutputs {
err := output.Save(metaImage, anime.ID)
if err != nil {
lastError = err
}
}
// Save the different image formats and sizes in high DPI
for _, output := range animeImageOutputsHighDPI {
err := output.Save(metaImage, anime.ID+"@2")
if err != nil {
lastError = err
}
}
anime.Image.Extension = metaImage.Extension()
anime.Image.Width = metaImage.Image.Bounds().Dx()
anime.Image.Height = metaImage.Image.Bounds().Dy()
anime.Image.AverageColor = GetAverageColor(metaImage.Image)
anime.Image.LastModified = time.Now().Unix()
return lastError
}