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 // Generates the human readable string from EDID obtained for |output|. 27 CHROMEOS_EXPORT std::string GetDisplayName(XID output); 28 29 // Gets the overscan flag from |output| and stores to |flag|. Returns true if 30 // the flag is found. Otherwise returns false and doesn't touch |flag|. The 31 // output will produce overscan if |flag| is set to true, but the output may 32 // still produce overscan even though it returns true and |flag| is set to 33 // false. 34 CHROMEOS_EXPORT bool GetOutputOverscanFlag(XID output, bool* flag); 35 36 // Parses |prop| as EDID data and stores the overscan flag to |flag|. Returns 37 // true if the flag is found. This is exported for x11_util_unittest.cc. 38 CHROMEOS_EXPORT bool ParseOutputOverscanFlag(const unsigned char* prop, 39 unsigned long nitems, 40 bool* flag); 41 42 // Returns true if an output named |name| is an internal display. 43 CHROMEOS_EXPORT bool IsInternalOutputName(const std::string& name); 44 45 // Find a XRRModeInfo that matches |mode|. 46 CHROMEOS_EXPORT const XRRModeInfo* FindXRRModeInfo( 47 const XRRScreenResources* screen_resources, 48 XID mode); 49 50 // Find a mode that matches the given size with highest refresh 51 // rate. Non-interlaced mode takes precedence, so non-interlaced mode 52 // with a lower refresh rate will be used even if there is an interlaced 53 // mode with a higher refresh rate. 54 CHROMEOS_EXPORT RRMode FindOutputModeMatchingSize( 55 const XRRScreenResources* screen_resources, 56 const XRROutputInfo* output_info, 57 size_t width, 58 size_t height); 59 60 namespace test { 61 62 // Creates XRRModeInfo for unit tests. 63 CHROMEOS_EXPORT XRRModeInfo CreateModeInfo(int id, 64 int width, 65 int height, 66 bool interlaced, 67 float refresh_rate); 68 69 } // namespace test 70 71 } // namespace chromeos 72 73 #endif // CHROMEOS_DISPLAY_OUTPUT_UTIL_H_ 74
