Move chromeos specific utility functions for display to chromeos/display

chromeos/display/output_util.h

+// Copyright (c) 2013 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 CHROMEOS_DISPLAY_OUTPUT_UTIL_H_
+#define CHROMEOS_DISPLAY_OUTPUT_UTIL_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "chromeos/chromeos_export.h"
+
+// Forward declarations for Xlib and Xrandr.
+// This is so unused X definitions don't pollute the namespace.
+typedef unsigned long XID;
+
+namespace chromeos {
+
+// Generates the display id for the pair of |output| and |index| and store
+// in |display_id_out|. Returns true if the display id is successfully
+// generated, or false otherwise.
+CHROMEOS_EXPORT bool GetDisplayId(XID output, size_t index,
+                                  int64* display_id_out);
+
+// Generates the human readable string from EDID obtained for |output|.
+CHROMEOS_EXPORT std::string GetDisplayName(XID output);
+
+// Gets the overscan flag from |output| and stores to |flag|. Returns true if
+// the flag is found. Otherwise returns false and doesn't touch |flag|. The
+// output will produce overscan if |flag| is set to true, but the output may
+// still produce overscan even though it returns true and |flag| is set to
+// false.
+CHROMEOS_EXPORT bool GetOutputOverscanFlag(XID output, bool* flag);
+
+// Parses |prop| as EDID data and stores extracted data into |manufacturer_id|,
+// |product_code|, and |human_readable_name| and returns true. NULL can be
+// passed for unwanted output parameters. This is exported for
+// x11_util_unittest.cc.
+CHROMEOS_EXPORT bool ParseOutputDeviceData(const unsigned char* prop,
+                                           unsigned long nitems,
+                                           uint16* manufacturer_id,
+                                           uint16* product_code,
+                                           std::string* human_readable_name);
+
+// Parses |prop| as EDID data and stores the overscan flag to |flag|. Returns
+// true if the flag is found. This is exported for x11_util_unittest.cc.
+CHROMEOS_EXPORT bool ParseOutputOverscanFlag(const unsigned char* prop,
+                                             unsigned long nitems,
+                                             bool* flag);
+
+// Returns true if an output named |name| is an internal display.
+CHROMEOS_EXPORT bool IsInternalOutputName(const std::string& name);
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DISPLAY_OUTPUT_UTIL_H_