feature (thumbnail): better thumbnail plugin

server/plugin/plg_image_c/image_raw.go

@@ -0,0 +1,10 @@
+package plg_image_c
+
+// #include "image_raw.h"
+// #cgo LDFLAGS: -l:libjpeg.a -l:libraw.a -fopenmp -l:libstdc++.a -llcms2 -lm
+import "C"
+
+func raw(input uintptr, output uintptr, size int) {
+	C.raw_to_jpeg(C.int(input), C.int(output), C.int(size))
+	return
+}