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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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