ui/ozone/platform/dri/display_mode_dri.cc

   1 // Copyright 2014 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 #include "ui/ozone/platform/dri/display_mode_dri.h"
   6
   7 namespace ui {
   8
   9 namespace {
  10
  11 float GetRefreshRate(const drmModeModeInfo& mode) {
  12   if (!mode.htotal || !mode.vtotal)
  13     return mode.vrefresh;
  14
  15   float clock = mode.clock;
  16   float htotal = mode.htotal;
  17   float vtotal = mode.vtotal;
  18
  19   return (clock * 1000.0f) / (htotal * vtotal);
  20 }
  21
  22 }  // namespace
  23
  24 DisplayModeDri::DisplayModeDri(const drmModeModeInfo& mode)
  25     : DisplayMode(gfx::Size(mode.hdisplay, mode.vdisplay),
  26                   mode.flags & DRM_MODE_FLAG_INTERLACE,
  27                   GetRefreshRate(mode)),
  28       mode_info_(mode) {
  29 }
  30
  31 DisplayModeDri::~DisplayModeDri() {
  32 }
  33
  34 }  // namespace ui