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image.go
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image.go
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package streamdeck
import (
"bytes"
"errors"
"fmt"
"image"
"image/color"
"image/draw"
_ "image/gif" // Allow gifs to be loaded
"image/jpeg"
_ "image/png" // Allow pngs to be loaded
"os"
"github.com/disintegration/gift"
"golang.org/x/image/bmp"
)
func resizeAndRotate(img image.Image, width, height int, devname string) image.Image {
g, _ := deviceSpecifics(devname, width, height)
res := image.NewRGBA(g.Bounds(img.Bounds()))
g.Draw(res, img)
return res
}
func deviceSpecifics(devName string, width, height int) (*gift.GIFT, error) {
switch devName {
case "Streamdeck XL", "Streamdeck (original v2)", "Stream Deck MK.2":
return gift.New(
gift.Resize(width, height, gift.LanczosResampling),
gift.Rotate180(),
), nil
case "Streamdeck Mini":
return gift.New(
gift.Resize(width, height, gift.LanczosResampling),
gift.Rotate90(),
gift.FlipVertical(),
), nil
case "Stream Deck Original":
return gift.New(
gift.Resize(width, height, gift.LanczosResampling),
gift.Rotate180(),
), nil
default:
return nil, errors.New(fmt.Sprintf("Unsupported Device: %s", devName))
}
}
func getImageForButton(img image.Image, btnFormat string) ([]byte, error) {
var b bytes.Buffer
switch btnFormat {
case "JPEG":
jpeg.Encode(&b, img, &jpeg.Options{Quality: 100})
case "BMP":
bmp.Encode(&b, img)
default:
return nil, errors.New("Unknown button image format: " + btnFormat)
}
return b.Bytes(), nil
}
func getSolidColourImage(colour color.Color, btnSize int) *image.RGBA {
img := image.NewRGBA(image.Rect(0, 0, btnSize, btnSize))
// colour := color.RGBA{red, green, blue, 0}
draw.Draw(img, img.Bounds(), image.NewUniform(colour), image.Point{0, 0}, draw.Src)
return img
}
func getImageFile(filename string) (image.Image, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
img, _, err := image.Decode(f)
if err != nil {
return nil, err
}
return img, nil
}