diff --git a/autoload/emmet/util.vim b/autoload/emmet/util.vim
index b806cb3..ef3d96f 100644
--- a/autoload/emmet/util.vim
+++ b/autoload/emmet/util.vim
@@ -206,6 +206,23 @@ function! emmet#util#getImageSize(fn)
   if filereadable(fn)
     let hex = substitute(system('xxd -p "'.fn.'"'), '\n', '', 'g')
   else
+    if fn !~ '^\w\+://'
+      let path = fnamemodify(expand('%'), ':p:gs?\\?/?')
+      if has('win32') || has('win64') | 
+        let path = tolower(path)
+      endif
+      for k in keys(g:emmet_docroot)
+        let root = fnamemodify(k, ':p:gs?\\?/?')
+        if has('win32') || has('win64') | 
+          let root = tolower(root)
+        endif
+        if stridx(path, root) == 0
+          let v = g:emmet_docroot[k]
+          let fn = (len(v) == 0 ? k : v) . fn
+          break
+        endif
+      endfor
+    endif
     let hex = substitute(system(g:emmet_curl_command.' "'.fn.'" | xxd -p'), '\n', '', 'g')
   endif
 
diff --git a/plugin/emmet.vim b/plugin/emmet.vim
index df4f7ce..0b4c803 100644
--- a/plugin/emmet.vim
+++ b/plugin/emmet.vim
@@ -78,6 +78,10 @@ if !exists('g:emmet_html5')
   let g:emmet_html5 = 1
 endif
 
+if !exists('g:emmet_docroot')
+  let g:emmet_docroot = {}
+endif
+
 if !exists('g:emmet_debug')
   let g:emmet_debug = 0
 endif