26 lines
489 B
Go
26 lines
489 B
Go
// +build js,wasm
|
|
|
|
package wasm
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/base64"
|
|
"image"
|
|
"image/png"
|
|
)
|
|
|
|
// StoreBitmap stores a bitmap image to sessionStorage as a data URL for PNG
|
|
// base64 encoded image.
|
|
func StoreBitmap(filename string, img image.Image) error {
|
|
var fh = bytes.NewBuffer([]byte{})
|
|
|
|
if err := png.Encode(fh, img); err != nil {
|
|
return err
|
|
}
|
|
|
|
var dataURI = "data:image/png;base64," + base64.StdEncoding.EncodeToString(fh.Bytes())
|
|
|
|
SetSession(filename, dataURI)
|
|
return nil
|
|
}
|