Mac: Infrastructure for serialization of OS fonts over IPC.

chrome/common/font_loader_mac.h

+// Copyright (c) 2010 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.
+
+#ifndef CHROME_COMMON_FONT_LOADER_MAC_H_
+#define CHROME_COMMON_FONT_LOADER_MAC_H_
+
+#include <ApplicationServices/ApplicationServices.h>
+
+#include "base/shared_memory.h"
+#include "base/string16.h"
+
+// Provides functionality to transmit fonts over IPC.
+//
+// Note about font formats: .dfont (datafork suitcase) fonts are currently not
+// supported by this code since ATSFontActivateFromMemory() can't handle them
+// directly.
+
+class FontLoader {
+ public:
+  // Load a font specified by |font_name| and |font_point_size| into a shared
+  // memory buffer suitable for sending over IPC.
+  //
+  // On return:
+  //  returns true on success, false on failure.
+  //  |font_data| - shared memory buffer containing the raw data for the font
+  // file.
+  //  |font_data_size| - size of data contained in |font_data|.
+  static bool LoadFontIntoBuffer(const string16& font_name,
+                                 float font_point_size,
+                                 base::SharedMemory* font_data,
+                                 uint32* font_data_size);
+
+  // Given a shared memory buffer containing the raw data for a font file, load
+  // the font into a CGFontRef.
+  //
+  // |data| - A shared memory handle pointing to the raw data from a font file.
+  // |data_size| - Size of |data|.
+  //
+  // On return:
+  //  returns true on success, false on failure.
+  //  |font| - A CGFontRef containing the designated font, the caller is
+  // responsible for releasing this value.
+  static bool CreateCGFontFromBuffer(base::SharedMemoryHandle font_data,
+                                     uint32 font_data_size,
+                                     CGFontRef* font);
+};
+
+#endif // CHROME_COMMON_FONT_LOADER_MAC_H_