| // 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 BASE_X11_EDID_PARSER_X11_H_ |
| #define BASE_X11_EDID_PARSER_X11_H_ |
| |
| #include <string> |
| |
| #include "base/base_export.h" |
| #include "base/basictypes.h" |
| |
| typedef unsigned long XID; |
| |
| // EDID (Extended Display Identification Data) is a format for monitor |
| // metadata. This provides a parser for the data and an interface to get it |
| // from XRandR. |
| |
| namespace base { |
| |
| // Get the EDID data from the |output| and stores to |prop|. |nitem| will store |
| // the number of characters |prop| will have. It doesn't take the ownership of |
| // |prop|, so caller must release it by XFree(). |
| // Returns true if EDID property is successfully obtained. Otherwise returns |
| // false and does not touch |prop| and |nitems|. |
| BASE_EXPORT bool GetEDIDProperty(XID output, |
| unsigned long* nitems, |
| unsigned char** prop); |
| |
| // Gets the EDID data from |output| and generates the display id through |
| // |GetDisplayIdFromEDID|. |
| BASE_EXPORT bool GetDisplayId(XID output, size_t index, |
| int64* display_id_out); |
| |
| // Generates the display id for the pair of |prop| with |nitems| length and |
| // |index|, and store in |display_id_out|. Returns true if the display id is |
| // successfully generated, or false otherwise. |
| BASE_EXPORT bool GetDisplayIdFromEDID(const unsigned char* prop, |
| unsigned long nitems, |
| size_t index, |
| int64* display_id_out); |
| |
| // Parses |prop| as EDID data and stores extracted data into |manufacturer_id| |
| // and |human_readable_name| and returns true. NULL can be passed for unwanted |
| // output parameters. Some devices (especially internal displays) may not have |
| // the field for |human_readable_name|, and it will return true in that case. |
| BASE_EXPORT bool ParseOutputDeviceData(const unsigned char* prop, |
| unsigned long nitems, |
| uint16* manufacturer_id, |
| std::string* human_readable_name); |
| |
| } // namespace base |
| |
| #endif // BASE_X11_EDID_PARSER_X11_H_ |