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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef BASE_X11_EDID_PARSER_X11_H_ | |
6 #define BASE_X11_EDID_PARSER_X11_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/base_export.h" | |
11 #include "base/basictypes.h" | |
12 | |
13 typedef unsigned long XID; | |
14 | |
15 // EDID (Extended Display Identification Data) is a format for monitor | |
16 // metadata. This provides a parser for the data and an interface to get it | |
17 // from XRandR. | |
18 | |
19 namespace base { | |
20 | |
21 // Get the EDID data from the |output| and stores to |prop|. |nitem| will store | |
22 // the number of characters |prop| will have. It doesn't take the ownership of | |
23 // |prop|, so caller must release it by XFree(). | |
24 // Returns true if EDID property is successfully obtained. Otherwise returns | |
25 // false and does not touch |prop| and |nitems|. | |
26 BASE_EXPORT bool GetEDIDProperty(XID output, | |
27 unsigned long* nitems, | |
28 unsigned char** prop); | |
29 | |
30 // Gets the EDID data from |output| and generates the display id through | |
31 // |GetDisplayIdFromEDID|. | |
32 BASE_EXPORT bool GetDisplayId(XID output, size_t index, | |
33 int64* display_id_out); | |
34 | |
35 // Generates the display id for the pair of |prop| with |nitems| length and | |
36 // |index|, and store in |display_id_out|. Returns true if the display id is | |
37 // successfully generated, or false otherwise. | |
38 BASE_EXPORT bool GetDisplayIdFromEDID(const unsigned char* prop, | |
39 unsigned long nitems, | |
40 size_t index, | |
41 int64* display_id_out); | |
42 | |
43 // Parses |prop| as EDID data and stores extracted data into |manufacturer_id| | |
44 // and |human_readable_name| and returns true. NULL can be passed for unwanted | |
45 // output parameters. Some devices (especially internal displays) may not have | |
46 // the field for |human_readable_name|, and it will return true in that case. | |
47 BASE_EXPORT bool ParseOutputDeviceData(const unsigned char* prop, | |
48 unsigned long nitems, | |
49 uint16* manufacturer_id, | |
50 std::string* human_readable_name); | |
51 | |
52 } // namespace base | |
53 | |
54 #endif // BASE_X11_EDID_PARSER_X11_H_ | |
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