feature (plg_image_*): support for new images and cleanup

server/plugin/plg_image_transcode/transcode_svg.go

@@ -0,0 +1,41 @@
+package plg_image_transcode
+
+import (
+	. "github.com/mickael-kerjean/filestash/server/common"
+	"github.com/srwiley/oksvg"
+	"github.com/srwiley/rasterx"
+	"image"
+	"image/png"
+	"io"
+)
+
+/*
+ * This bit isn't used because the rendering is very poor and would
+ * generate too many bug reports
+ */
+func transcodeSvg(reader io.Reader) (io.ReadCloser, string, error) {
+	icon, err := oksvg.ReadIconStream(reader)
+	if err != nil {
+		return nil, "", err
+	}
+	icon.SetTarget(0, 0, icon.ViewBox.W, icon.ViewBox.H)
+	width := int(icon.ViewBox.W)
+	height := int(icon.ViewBox.H)
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+	icon.Draw(
+		rasterx.NewDasher(
+			width, height,
+			rasterx.NewScannerGV(width, height, img, img.Bounds()),
+		), 1,
+	)
+
+	r, w := io.Pipe()
+	go func() {
+		err := png.Encode(w, img)
+		w.Close()
+		if err != nil {
+			Log.Debug("plg_image_transcode::svg png encoding error '%s'", err.Error())
+		}
+	}()
+	return NewReadCloserFromReader(r), "image/png", nil
+}