Make the Pepper proxy support in-process font rendering.

This implements a WebKit thread in the PPAPI plugin process so we can do the
font calls without IPC. The existing font support was refactored into
a virtual class (to prevent PPAPI from depending on WebKit and creating a
circular GYP dependency).

This moves the renderer sandbox support into content/common so that it can
be used by the PPAPI process.
Review URL: http://codereview.chromium.org/6981001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@84856 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 36 insertions, 0 deletions

diff --git a/ppapi/shared_impl/font_impl.cc b/ppapi/shared_impl/font_impl.cc
new file mode 100644
index 0000000..3feaf9f
--- /dev/null
+++ b/ppapi/shared_impl/font_impl.cc
@@ -0,0 +1,36 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/shared_impl/font_impl.h"
+
+#include "ppapi/c/dev/ppb_font_dev.h"
+
+namespace pp {
+namespace shared_impl {
+
+// static
+bool FontImpl::IsPPFontDescriptionValid(const PP_FontDescription_Dev& desc) {
+  // Check validity of string. We can't check the actual text since we could
+  // be on the wrong thread and don't know if we're in the plugin or the host.
+  if (desc.face.type != PP_VARTYPE_STRING &&
+      desc.face.type != PP_VARTYPE_UNDEFINED)
+    return false;
+
+  // Check enum ranges.
+  if (static_cast<int>(desc.family) < PP_FONTFAMILY_DEFAULT ||
+      static_cast<int>(desc.family) > PP_FONTFAMILY_MONOSPACE)
+    return false;
+  if (static_cast<int>(desc.weight) < PP_FONTWEIGHT_100 ||
+      static_cast<int>(desc.weight) > PP_FONTWEIGHT_900)
+    return false;
+
+  // Check for excessive sizes which may cause layout to get confused.
+  if (desc.size > 200)
+    return false;
+
+  return true;
+}
+
+}  // namespace shared_impl
+}  // namespace pp