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 CHROMEOS_DISPLAY_OUTPUT_UTIL_H_ 6 #define CHROMEOS_DISPLAY_OUTPUT_UTIL_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "chromeos/chromeos_export.h" 12 13 // Forward declarations for Xlib and Xrandr. 14 // This is so unused X definitions don't pollute the namespace. 15 typedef unsigned long XID; 16 typedef XID RRMode; 17 struct _XRRModeInfo; 18 typedef _XRRModeInfo XRRModeInfo; 19 struct _XRRScreenResources; 20 typedef _XRRScreenResources XRRScreenResources; 21 struct _XRROutputInfo; 22 typedef _XRROutputInfo XRROutputInfo; 23 24 namespace chromeos { 25 26 // Gets the EDID data from |output| and generates the display id through 27 // |GetDisplayIdFromEDID|. 28 CHROMEOS_EXPORT bool GetDisplayId(XID output, size_t index, 29 int64* display_id_out); 30 31 // Generates the display id for the pair of |prop| with |nitems| length and 32 // |index|, and store in |display_id_out|. Returns true if the display id is 33 // successfully generated, or false otherwise. 34 CHROMEOS_EXPORT bool GetDisplayIdFromEDID(const unsigned char* prop, 35 unsigned long nitems, 36 size_t index, 37 int64* display_id_out); 38 39 // Generates the human readable string from EDID obtained for |output|. 40 CHROMEOS_EXPORT std::string GetDisplayName(XID output); 41 42 // Gets the overscan flag from |output| and stores to |flag|. Returns true if 43 // the flag is found. Otherwise returns false and doesn't touch |flag|. The 44 // output will produce overscan if |flag| is set to true, but the output may 45 // still produce overscan even though it returns true and |flag| is set to 46 // false. 47 CHROMEOS_EXPORT bool GetOutputOverscanFlag(XID output, bool* flag); 48 49 // Parses |prop| as EDID data and stores extracted data into |manufacturer_id| 50 // and |human_readable_name| and returns true. NULL can be passed for unwanted 51 // output parameters. Some devices (especially internal displays) may not have 52 // the field for |human_readable_name|, and it will return true in that case. 53 CHROMEOS_EXPORT bool ParseOutputDeviceData(const unsigned char* prop, 54 unsigned long nitems, 55 uint16* manufacturer_id, 56 std::string* human_readable_name); 57 58 // Parses |prop| as EDID data and stores the overscan flag to |flag|. Returns 59 // true if the flag is found. This is exported for x11_util_unittest.cc. 60 CHROMEOS_EXPORT bool ParseOutputOverscanFlag(const unsigned char* prop, 61 unsigned long nitems, 62 bool* flag); 63 64 // Returns true if an output named |name| is an internal display. 65 CHROMEOS_EXPORT bool IsInternalOutputName(const std::string& name); 66 67 // Find a XRRModeInfo that matches |mode|. 68 CHROMEOS_EXPORT const XRRModeInfo* FindModeInfo( 69 const XRRScreenResources* screen_resources, 70 XID mode); 71 72 // Find a mode that matches the given size with highest refresh 73 // rate. Non-interlaced mode takes precedence, so non-interlaced mode 74 // with a lower refresh rate will be used even if there is an interlaced 75 // mode with a higher refresh rate. 76 CHROMEOS_EXPORT RRMode FindOutputModeMatchingSize( 77 const XRRScreenResources* screen_resources, 78 const XRROutputInfo* output_info, 79 size_t width, 80 size_t height); 81 82 namespace test { 83 84 // Creates XRRModeInfo for unit tests. 85 CHROMEOS_EXPORT XRRModeInfo CreateModeInfo(int id, 86 int width, 87 int height, 88 bool interlaced, 89 float refresh_rate); 90 91 } // namespace test 92 93 } // namespace chromeos 94 95 #endif // CHROMEOS_DISPLAY_OUTPUT_UTIL_H_ 96
