https://github.com/oov/psd
PSD/PSB(Photoshop) file reader for Go programming language
https://github.com/oov/psd
Last synced: 2 months ago
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PSD/PSB(Photoshop) file reader for Go programming language
- Host: GitHub
- URL: https://github.com/oov/psd
- Owner: oov
- License: mit
- Created: 2016-01-15T12:25:34.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2022-01-21T17:28:28.000Z (over 3 years ago)
- Last Synced: 2025-04-03T13:19:00.178Z (2 months ago)
- Language: Go
- Homepage: https://godoc.org/github.com/oov/psd
- Size: 5.4 MB
- Stars: 151
- Watchers: 4
- Forks: 20
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# PSD/PSB(Photoshop) file reader for Go programming language
It works almost well but it is still in development.
## How to use
### Example1
Simple psd -> png conversion.
```go
package main
import (
"image"
"image/png"
"os"
_ "github.com/oov/psd"
)
func main() {
file, err := os.Open("image.psd")
if err != nil {
panic(err)
}
defer file.Close()
img, _, err := image.Decode(file)
if err != nil {
panic(err)
}
out, err := os.Create("image.png")
if err != nil {
panic(err)
}
err = png.Encode(out, img)
if err != nil {
panic(err)
}
}
```
### Example2
Extract all layer images.
```go
package main
import (
"fmt"
"image/png"
"os"
"github.com/oov/psd"
)
func processLayer(filename string, layerName string, l *psd.Layer) error {
if len(l.Layer) > 0 {
for i, ll := range l.Layer {
if err := processLayer(
fmt.Sprintf("%s_%03d", filename, i),
layerName+"/"+ll.Name, &ll); err != nil {
return err
}
}
}
if !l.HasImage() {
return nil
}
fmt.Printf("%s -> %s.png\n", layerName, filename)
out, err := os.Create(fmt.Sprintf("%s.png", filename))
if err != nil {
return err
}
defer out.Close()
return png.Encode(out, l.Picker)
}
func main() {
file, err := os.Open("image.psd")
if err != nil {
panic(err)
}
defer file.Close()
img, _, err := psd.Decode(file, &psd.DecodeOptions{SkipMergedImage: true})
if err != nil {
panic(err)
}
for i, layer := range img.Layer {
if err = processLayer(fmt.Sprintf("%03d", i), layer.Name, &layer); err != nil {
panic(err)
}
}
}
```
# Current status
It is not implemented any blending functions because layer composition isn't covered by this package at present.
- [Image Resource Section](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_69883) is parsed but [Image resource IDs](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_38034) are not defined as constant.
- [Global layer mask info](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_17115) is not parsed.
- [Layer blending ranges data](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_21332) is not parsed.
- [Additional Layer Information](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_pgfId-1049436) is parsed but keys are almost not defined as constant.
## Color Modes
### Implemented
- Bitmap 1bit
- Grayscale 8bit
- Grayscale 16bit
- Grayscale 32bit
- Indexed
- RGB 8bit
- RGB 16bit
- RGB 32bit
- CMYK 8bit
- CMYK 16bit
### Not implemented
- CMYK 32bit
- Multichannel
- Duotone
- Lab
## Supported Compression Methods
- Raw
- RLE(PackBits)
- ZIP without prediction (not tested)
- ZIP with prediction