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package screenshot
import (
"bufio"
"fmt"
"image"
"image/jpeg"
"image/png"
"io"
"os"
"path/filepath"
"strings"
"time"
"github.com/AvengeMedia/DankMaterialShell/core/internal/log"
"github.com/AvengeMedia/DankMaterialShell/core/internal/utils"
)
func BufferToImage(buf *ShmBuffer) *image.RGBA {
return BufferToImageWithFormat(buf, uint32(FormatARGB8888))
}
func BufferToImageWithFormat(buf *ShmBuffer, format uint32) *image.RGBA {
img := image.NewRGBA(image.Rect(0, 0, buf.Width, buf.Height))
data := buf.Data()
var swapRB bool
switch format {
case uint32(FormatABGR8888), uint32(FormatXBGR8888):
swapRB = false
default:
swapRB = true
}
for y := 0; y < buf.Height; y++ {
srcOff := y * buf.Stride
dstOff := y * img.Stride
for x := 0; x < buf.Width; x++ {
si := srcOff + x*4
di := dstOff + x*4
if si+3 >= len(data) || di+3 >= len(img.Pix) {
continue
}
if swapRB {
img.Pix[di+0] = data[si+2]
img.Pix[di+1] = data[si+1]
img.Pix[di+2] = data[si+0]
} else {
img.Pix[di+0] = data[si+0]
img.Pix[di+1] = data[si+1]
img.Pix[di+2] = data[si+2]
}
img.Pix[di+3] = 255
}
}
return img
}
func EncodePNG(w io.Writer, img image.Image) error {
enc := png.Encoder{CompressionLevel: png.BestSpeed}
return enc.Encode(w, img)
}
func EncodeJPEG(w io.Writer, img image.Image, quality int) error {
return jpeg.Encode(w, img, &jpeg.Options{Quality: quality})
}
func EncodePPM(w io.Writer, img *image.RGBA) error {
bw := bufio.NewWriter(w)
bounds := img.Bounds()
if _, err := fmt.Fprintf(bw, "P6\n%d %d\n255\n", bounds.Dx(), bounds.Dy()); err != nil {
return err
}
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
off := (y-bounds.Min.Y)*img.Stride + (x-bounds.Min.X)*4
if err := bw.WriteByte(img.Pix[off+0]); err != nil {
return err
}
if err := bw.WriteByte(img.Pix[off+1]); err != nil {
return err
}
if err := bw.WriteByte(img.Pix[off+2]); err != nil {
return err
}
}
}
return bw.Flush()
}
func GenerateFilename(format Format) string {
t := time.Now()
ext := "png"
switch format {
case FormatJPEG:
ext = "jpg"
case FormatPPM:
ext = "ppm"
}
return fmt.Sprintf("screenshot_%s.%s", t.Format("2006-01-02_15-04-05"), ext)
}
func GetOutputDir() string {
if dir := os.Getenv("DMS_SCREENSHOT_DIR"); dir != "" {
return dir
}
if xdgPics := getXDGPicturesDir(); xdgPics != "" {
screenshotDir := filepath.Join(xdgPics, "Screenshots")
if err := os.MkdirAll(screenshotDir, 0o755); err == nil {
return screenshotDir
}
return xdgPics
}
if home := os.Getenv("HOME"); home != "" {
return home
}
return "."
}
func getXDGPicturesDir() string {
userConfigDir, err := os.UserConfigDir()
if err != nil {
log.Error("failed to get user config dir", "err", err)
return ""
}
userDirsFile := filepath.Join(userConfigDir, "user-dirs.dirs")
data, err := os.ReadFile(userDirsFile)
if err != nil {
return ""
}
for _, line := range strings.Split(string(data), "\n") {
if len(line) == 0 || line[0] == '#' {
continue
}
const prefix = "XDG_PICTURES_DIR="
if !strings.HasPrefix(line, prefix) {
continue
}
path := strings.Trim(line[len(prefix):], "\"")
expanded, err := utils.ExpandPath(path)
if err != nil {
return ""
}
return expanded
}
return ""
}
func WriteToFile(buf *ShmBuffer, path string, format Format, quality int) error {
return WriteToFileWithFormat(buf, path, format, quality, uint32(FormatARGB8888))
}
func WriteToFileWithFormat(buf *ShmBuffer, path string, format Format, quality int, pixelFormat uint32) error {
f, err := os.Create(path)
if err != nil {
return err
}
defer f.Close()
img := BufferToImageWithFormat(buf, pixelFormat)
switch format {
case FormatJPEG:
return EncodeJPEG(f, img, quality)
case FormatPPM:
return EncodePPM(f, img)
default:
return EncodePNG(f, img)
}
}
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