ec1f89217a
Full Mattermost server source with integrated Community Enterprise features. Includes vendor directory for offline/air-gapped builds. Structure: - enterprise-impl/: Enterprise feature implementations - enterprise-community/: Init files that register implementations - enterprise/: Bridge imports (community_imports.go) - vendor/: All dependencies for offline builds Build (online): go build ./cmd/mattermost Build (offline/air-gapped): go build -mod=vendor ./cmd/mattermost 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
138 lines
2.6 KiB
Markdown
138 lines
2.6 KiB
Markdown
# PSD/PSB(Photoshop) file reader for Go programming language
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It works almost well but it is still in development.
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## How to use
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### Example1
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Simple psd -> png conversion.
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```go
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package main
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import (
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"image"
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"image/png"
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"os"
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_ "github.com/oov/psd"
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)
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func main() {
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file, err := os.Open("image.psd")
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if err != nil {
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panic(err)
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}
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defer file.Close()
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img, _, err := image.Decode(file)
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if err != nil {
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panic(err)
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}
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out, err := os.Create("image.png")
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if err != nil {
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panic(err)
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}
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err = png.Encode(out, img)
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if err != nil {
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panic(err)
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}
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}
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```
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### Example2
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Extract all layer images.
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```go
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package main
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import (
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"fmt"
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"image/png"
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"os"
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"github.com/oov/psd"
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)
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func processLayer(filename string, layerName string, l *psd.Layer) error {
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if len(l.Layer) > 0 {
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for i, ll := range l.Layer {
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if err := processLayer(
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fmt.Sprintf("%s_%03d", filename, i),
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layerName+"/"+ll.Name, &ll); err != nil {
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return err
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}
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}
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}
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if !l.HasImage() {
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return nil
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}
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fmt.Printf("%s -> %s.png\n", layerName, filename)
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out, err := os.Create(fmt.Sprintf("%s.png", filename))
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if err != nil {
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return err
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}
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defer out.Close()
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return png.Encode(out, l.Picker)
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}
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func main() {
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file, err := os.Open("image.psd")
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if err != nil {
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panic(err)
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}
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defer file.Close()
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img, _, err := psd.Decode(file, &psd.DecodeOptions{SkipMergedImage: true})
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if err != nil {
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panic(err)
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}
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for i, layer := range img.Layer {
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if err = processLayer(fmt.Sprintf("%03d", i), layer.Name, &layer); err != nil {
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panic(err)
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}
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}
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}
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```
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# Current status
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It is not implemented any blending functions because layer composition isn't covered by this package at present.
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- [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.
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- [Global layer mask info](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_17115) is not parsed.
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- [Layer blending ranges data](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_21332) is not parsed.
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- [Additional Layer Information](http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_pgfId-1049436) is parsed but keys are almost not defined as constant.
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## Color Modes
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### Implemented
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- Bitmap 1bit
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- Grayscale 8bit
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- Grayscale 16bit
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- Grayscale 32bit
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- Indexed
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- RGB 8bit
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- RGB 16bit
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- RGB 32bit
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- CMYK 8bit
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- CMYK 16bit
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### Not implemented
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- CMYK 32bit
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- Multichannel
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- Duotone
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- Lab
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## Supported Compression Methods
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- Raw
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- RLE(PackBits)
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- ZIP without prediction (not tested)
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- ZIP with prediction
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