Split SkFontConfigInterface globals and factory.

Chromium needs to be able to set up their build such that the globals
continue existing but the SkFontMgr::Factory can be defined separately.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2346333002
CQ_INCLUDE_TRYBOTS=master.client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac-Clang-x86_64-Release-CMake-Trybot

Review-Url: https://codereview.chromium.org/2346333002

1 files changed, 30 insertions, 0 deletions

diff --git a/src/ports/SkFontConfigInterface.cpp b/src/ports/SkFontConfigInterface.cpp
new file mode 100644
index 0000000000..5b8731c3d0
--- /dev/null
+++ b/src/ports/SkFontConfigInterface.cpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkFontConfigInterface.h"
+#include "SkFontMgr.h"
+#include "SkMutex.h"
+#include "SkRefCnt.h"
+
+SK_DECLARE_STATIC_MUTEX(gFontConfigInterfaceMutex);
+static SkFontConfigInterface* gFontConfigInterface;
+
+SkFontConfigInterface* SkFontConfigInterface::RefGlobal() {
+    SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
+
+    if (gFontConfigInterface) {
+        return SkRef(gFontConfigInterface);
+    }
+    return SkSafeRef(SkFontConfigInterface::GetSingletonDirectInterface());
+}
+
+SkFontConfigInterface* SkFontConfigInterface::SetGlobal(SkFontConfigInterface* fc) {
+    SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
+
+    SkRefCnt_SafeAssign(gFontConfigInterface, fc);
+    return fc;
+}