ui/gfx/color_profile_win.cc

   1 // Copyright (c) 2012 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/gfx/color_profile.h"
   6
   7 #include <windows.h>
   8 #include <map>
   9
  10 #include "base/files/file_util.h"
  11 #include "base/lazy_instance.h"
  12 #include "base/synchronization/lock.h"
  13
  14 namespace gfx {
  15
  16 class ColorProfileCache {
  17  public:
  18   // A thread-safe cache of color profiles keyed by windows device name.
  19   ColorProfileCache() {}
  20
  21   bool Find(const std::wstring& device, std::vector<char>* profile) {
  22     base::AutoLock lock(lock_);
  23     DeviceColorProfile::const_iterator it = cache_.find(device);
  24     if (it == cache_.end())
  25       return false;
  26     *profile = it->second;
  27     return true;
  28   }
  29
  30   void Insert(const std::wstring& device, const std::vector<char>& profile) {
  31     base::AutoLock lock(lock_);
  32     cache_[device] = profile;
  33   }
  34
  35   bool Erase(const std::wstring& device) {
  36     base::AutoLock lock(lock_);
  37     DeviceColorProfile::iterator it = cache_.find(device);
  38     if (it == cache_.end())
  39       return false;
  40     cache_.erase(device);
  41     return true;
  42   }
  43
  44   void Clear() {
  45     base::AutoLock lock(lock_);
  46     cache_.clear();
  47   }
  48
  49  private:
  50   typedef std::map<std::wstring, std::vector<char> > DeviceColorProfile;
  51
  52   DeviceColorProfile cache_;
  53   base::Lock lock_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ColorProfileCache);
  56 };
  57
  58 base::LazyInstance<ColorProfileCache>::Leaky g_color_profile_cache =
  59     LAZY_INSTANCE_INITIALIZER;
  60
  61 inline ColorProfileCache& GetColorProfileCache() {
  62   return g_color_profile_cache.Get();
  63 }
  64
  65 bool GetDisplayColorProfile(const gfx::Rect& bounds,
  66                             std::vector<char>* profile) {
  67   DCHECK(profile->empty());
  68
  69   RECT rect = bounds.ToRECT();
  70   HMONITOR handle = ::MonitorFromRect(&rect, MONITOR_DEFAULTTONULL);
  71   if (bounds.IsEmpty() || !handle)
  72     return false;
  73
  74   MONITORINFOEX monitor;
  75   monitor.cbSize = sizeof(MONITORINFOEX);
  76   CHECK(::GetMonitorInfo(handle, &monitor));
  77   if (GetColorProfileCache().Find(monitor.szDevice, profile))
  78     return true;
  79
  80   HDC hdc = ::CreateDC(monitor.szDevice, NULL, NULL, NULL);
  81   DWORD path_length = MAX_PATH;
  82   WCHAR path[MAX_PATH + 1];
  83   BOOL result = ::GetICMProfile(hdc, &path_length, path);
  84   ::DeleteDC(hdc);
  85   if (!result)
  86     return false;
  87
  88   base::FilePath file_name = base::FilePath(path).BaseName();
  89   if (file_name != base::FilePath(L"sRGB Color Space Profile.icm")) {
  90     std::string data;
  91     if (base::ReadFileToString(base::FilePath(path), &data))
  92       profile->assign(data.data(), data.data() + data.size());
  93     size_t length = profile->size();
  94     if (gfx::InvalidColorProfileLength(length))
  95       profile->clear();
  96   }
  97
  98   GetColorProfileCache().Insert(monitor.szDevice, *profile);
  99   return true;
 100 }
 101
 102 void ReadColorProfile(std::vector<char>* profile) {
 103   // TODO: support multiple monitors.
 104   HDC screen_dc = GetDC(NULL);
 105   DWORD path_len = MAX_PATH;
 106   WCHAR path[MAX_PATH + 1];
 107
 108   BOOL result = GetICMProfile(screen_dc, &path_len, path);
 109   ReleaseDC(NULL, screen_dc);
 110   if (!result)
 111     return;
 112   std::string profileData;
 113   if (!base::ReadFileToString(base::FilePath(path), &profileData))
 114     return;
 115   size_t length = profileData.size();
 116   if (gfx::InvalidColorProfileLength(length))
 117     return;
 118   profile->assign(profileData.data(), profileData.data() + length);
 119 }
 120
 121 }  // namespace gfx