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add options to rotate and flip images

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This commit is contained in:
Milan Nikolic
2015-11-04 14:20:37 +01:00
parent d7be2f4d5e
commit d70de9f4db
2 changed files with 75 additions and 48 deletions
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51
README.md
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@@ -14,6 +14,7 @@ Features
- images can be converted to JPEG, PNG, GIF or 4-Bit BMP (16 colors) file format
- reads JPEG, PNG, BMP, GIF, TIFF and WEBP file formats
- choose resize algorithm (NearestNeighbor, Box, Linear, MitchellNetravali, CatmullRom, Gaussian, Lanczos)
- rotate, flip or grayscale images
- export covers from comics
- create thumbnails from covers by [freedesktop](http://www.freedesktop.org/wiki/) specification
@@ -35,10 +36,10 @@ Using
Flags:
--help Show context-sensitive help (also try --help-long and --help-man).
--version Show application version.
-o, --outdir="." Output directory
-m, --size=0 Process only files larger then size (in MB)
-R, --recursive Process subdirectories recursively
-Q, --quiet Hide console output
--outdir="." Output directory
--size=0 Process only files larger then size (in MB)
--recursive Process subdirectories recursively
--quiet Hide console output
Args:
<args> filename or directory
@@ -49,33 +50,35 @@ Using
convert [<flags>] <args>...
Convert archive or document (default)
Convert archive or document (default command)
-w, --width=0 Image width
-h, --height=0 Image height
-q, --quality=75 JPEG image quality
-f, --filter=2 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
-p, --png Encode images to PNG instead of JPEG
-b, --bmp Encode images to 4-Bit BMP (16 colors) instead of JPEG
-g, --gif Encode images to GIF instead of JPEG
-N, --rgb Convert images that have RGB colorspace (use --no-rgb if you only want to process grayscale images)
-I, --nonimage Leave non image files in archive (use --no-nonimage to remove non image files from archive)
-G, --grayscale Convert images to grayscale (monochromatic)
-s, --suffix=SUFFIX Add suffix to file basename
--width=0 Image width
--height=0 Image height
--quality=75 JPEG image quality
--filter=2 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
--png Encode images to PNG instead of JPEG
--bmp Encode images to 4-Bit BMP (16 colors) instead of JPEG
--gif Encode images to GIF instead of JPEG
--rgb Convert images that have RGB colorspace (use --no-rgb if you only want to process grayscale images)
--nonimage Leave non image files in archive (use --no-nonimage to remove non image files from archive)
--grayscale Convert images to grayscale (monochromatic)
--rotate=0 Rotate images, valid values are 0, 90, 180, 270
--flip="none" Flip images, valid values are none, horizontal, vertical
--suffix=SUFFIX Add suffix to file basename
cover [<flags>] <args>...
Extract cover
-w, --width=0 Image width
-h, --height=0 Image height
-q, --quality=75 JPEG image quality
-f, --filter=2 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
--width=0 Image width
--height=0 Image height
--quality=75 JPEG image quality
--filter=2 0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos
thumbnail [<flags>] <args>...
Extract cover thumbnail (freedesktop spec.)
-w, --width=0 Image width
-h, --height=0 Image height
--width=0 Image width
--height=0 Image height
Examples
--------
@@ -84,9 +87,9 @@ Rescale images to 1200px for all supported files found in directory with size la
cbconvert --recursive --width 1200 --size 60 /media/comics/Thorgal/
Convert all images in archive to 4bit BMP image and save result in ~/comics directory:
Convert all images in pdf to 4bit BMP image and save result in ~/comics directory:
cbconvert --bmp --outdir ~/comics /media/comics/Garfield/Garfield_01.cbz
cbconvert --bmp --outdir ~/comics /media/comics/Garfield/Garfield_01.pdf
[BMP](http://en.wikipedia.org/wiki/BMP_file_format) format is very good choice for black&white pages. Archive size can be smaller 2-3x and file will be readable by comic readers.

68
cbconvert.go
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@@ -97,6 +97,8 @@ type options struct {
Thumbnail bool // extract cover thumbnail (freedesktop spec.)
Outdir string // output directory
Grayscale bool // convert images to grayscale (monochromatic)
Rotate int // Rotate images, valid values are 0, 90, 180, 270
Flip string // Flip images, valid values are none, horizontal, vertical
Recursive bool // process subdirectories recursively
Size int64 // process only files larger then size (in MB)
Quiet bool // hide console output
@@ -140,6 +142,26 @@ func convertImage(img image.Image, index int, pathName string) {
i = imaging.Grayscale(img)
}
if opts.Rotate > 0 {
switch opts.Rotate {
case 90:
i = imaging.Rotate90(img)
case 180:
i = imaging.Rotate180(img)
case 270:
i = imaging.Rotate270(img)
}
}
if opts.Flip != "none" {
switch opts.Flip {
case "horizontal":
i = imaging.FlipH(img)
case "vertical":
i = imaging.FlipV(img)
}
}
if opts.ToPNG {
// convert image to PNG
f, err := os.Create(filename)
@@ -836,36 +858,38 @@ func parseFlags() {
kingpin.CommandLine.Help = "Comic Book convert tool."
kingpin.UsageTemplate(kingpin.CompactUsageTemplate)
kingpin.Flag("outdir", "Output directory").Default(".").Short('o').StringVar(&opts.Outdir)
kingpin.Flag("size", "Process only files larger then size (in MB)").Short('m').Default(strconv.Itoa(0)).Int64Var(&opts.Size)
kingpin.Flag("recursive", "Process subdirectories recursively").Short('R').BoolVar(&opts.Recursive)
kingpin.Flag("quiet", "Hide console output").Short('Q').BoolVar(&opts.Quiet)
kingpin.Flag("outdir", "Output directory").Default(".").StringVar(&opts.Outdir)
kingpin.Flag("size", "Process only files larger then size (in MB)").Default(strconv.Itoa(0)).Int64Var(&opts.Size)
kingpin.Flag("recursive", "Process subdirectories recursively").BoolVar(&opts.Recursive)
kingpin.Flag("quiet", "Hide console output").BoolVar(&opts.Quiet)
convert := kingpin.Command("convert", "Convert archive or document (default)").Default()
convert := kingpin.Command("convert", "Convert archive or document (default command)").Default()
convert.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&arguments)
convert.Flag("width", "Image width").Default(strconv.Itoa(0)).Short('w').IntVar(&opts.Width)
convert.Flag("height", "Image height").Default(strconv.Itoa(0)).Short('h').IntVar(&opts.Height)
convert.Flag("quality", "JPEG image quality").Short('q').Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
convert.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Short('f').Default(strconv.Itoa(Linear)).IntVar(&opts.Filter)
convert.Flag("png", "Encode images to PNG instead of JPEG").Short('p').BoolVar(&opts.ToPNG)
convert.Flag("bmp", "Encode images to 4-Bit BMP (16 colors) instead of JPEG").Short('b').BoolVar(&opts.ToBMP)
convert.Flag("gif", "Encode images to GIF instead of JPEG").Short('g').BoolVar(&opts.ToGIF)
convert.Flag("rgb", "Convert images that have RGB colorspace (use --no-rgb if you only want to process grayscale images)").Short('N').Default("true").BoolVar(&opts.RGB)
convert.Flag("nonimage", "Leave non image files in archive (use --no-nonimage to remove non image files from archive)").Short('I').Default("true").BoolVar(&opts.NonImage)
convert.Flag("grayscale", "Convert images to grayscale (monochromatic)").Short('G').BoolVar(&opts.Grayscale)
convert.Flag("suffix", "Add suffix to file basename").Short('s').StringVar(&opts.Suffix)
convert.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
convert.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
convert.Flag("quality", "JPEG image quality").Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
convert.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Default(strconv.Itoa(Linear)).IntVar(&opts.Filter)
convert.Flag("png", "Encode images to PNG instead of JPEG").BoolVar(&opts.ToPNG)
convert.Flag("bmp", "Encode images to 4-Bit BMP (16 colors) instead of JPEG").BoolVar(&opts.ToBMP)
convert.Flag("gif", "Encode images to GIF instead of JPEG").BoolVar(&opts.ToGIF)
convert.Flag("rgb", "Convert images that have RGB colorspace (use --no-rgb if you only want to process grayscale images)").Default("true").BoolVar(&opts.RGB)
convert.Flag("nonimage", "Leave non image files in archive (use --no-nonimage to remove non image files from archive)").Default("true").BoolVar(&opts.NonImage)
convert.Flag("grayscale", "Convert images to grayscale (monochromatic)").BoolVar(&opts.Grayscale)
convert.Flag("rotate", "Rotate images, valid values are 0, 90, 180, 270").Default(strconv.Itoa(0)).IntVar(&opts.Rotate)
convert.Flag("flip", "Flip images, valid values are none, horizontal, vertical").Default("none").StringVar(&opts.Flip)
convert.Flag("suffix", "Add suffix to file basename").StringVar(&opts.Suffix)
cover := kingpin.Command("cover", "Extract cover")
cover.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&arguments)
cover.Flag("width", "Image width").Default(strconv.Itoa(0)).Short('w').IntVar(&opts.Width)
cover.Flag("height", "Image height").Default(strconv.Itoa(0)).Short('h').IntVar(&opts.Height)
cover.Flag("quality", "JPEG image quality").Short('q').Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
cover.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Short('f').Default(strconv.Itoa(Linear)).IntVar(&opts.Filter)
cover.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
cover.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
cover.Flag("quality", "JPEG image quality").Default(strconv.Itoa(jpeg.DefaultQuality)).IntVar(&opts.Quality)
cover.Flag("filter", "0=NearestNeighbor, 1=Box, 2=Linear, 3=MitchellNetravali, 4=CatmullRom, 6=Gaussian, 7=Lanczos").Default(strconv.Itoa(Linear)).IntVar(&opts.Filter)
thumbnail := kingpin.Command("thumbnail", "Extract cover thumbnail (freedesktop spec.)")
thumbnail.Arg("args", "filename or directory").Required().ExistingFilesOrDirsVar(&arguments)
thumbnail.Flag("width", "Image width").Default(strconv.Itoa(0)).Short('w').IntVar(&opts.Width)
thumbnail.Flag("height", "Image height").Default(strconv.Itoa(0)).Short('h').IntVar(&opts.Height)
thumbnail.Flag("width", "Image width").Default(strconv.Itoa(0)).IntVar(&opts.Width)
thumbnail.Flag("height", "Image height").Default(strconv.Itoa(0)).IntVar(&opts.Height)
switch kingpin.Parse() {
case "cover":