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      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/base/resource/resource_bundle_win.h"
      6 
      7 #include "base/logging.h"
      8 #include "base/path_service.h"
      9 #include "base/strings/utf_string_conversions.h"
     10 #include "ui/base/layout.h"
     11 #include "ui/base/resource/resource_bundle.h"
     12 #include "ui/base/resource/resource_data_dll_win.h"
     13 #include "ui/base/win/dpi.h"
     14 
     15 namespace ui {
     16 
     17 namespace {
     18 
     19 HINSTANCE resources_data_dll;
     20 
     21 HINSTANCE GetCurrentResourceDLL() {
     22   if (resources_data_dll)
     23     return resources_data_dll;
     24   return GetModuleHandle(NULL);
     25 }
     26 
     27 base::FilePath GetResourcesPakFilePath(const std::string& pak_name) {
     28   base::FilePath path;
     29   if (PathService::Get(base::DIR_MODULE, &path))
     30     return path.AppendASCII(pak_name.c_str());
     31 
     32   // Return just the name of the pack file.
     33   return base::FilePath(ASCIIToUTF16(pak_name));
     34 }
     35 
     36 }  // namespace
     37 
     38 void ResourceBundle::LoadCommonResources() {
     39   // As a convenience, add the current resource module as a data packs.
     40   data_packs_.push_back(new ResourceDataDLL(GetCurrentResourceDLL()));
     41   // Have high-DPI resources for 140% and 180% scaling on Windows based on
     42   // default scaling for Metro mode. If high-DPI mode is enabled, load resource
     43   // pak closest to the desired scale factor.  The high-DPI resources are
     44   // scaled up from 100% touch.
     45   float scale = ui::win::GetDeviceScaleFactor();
     46   bool force_touch_resources = false;
     47   switch(ui::GetScaleFactorFromScale(scale)) {
     48     case ui::SCALE_FACTOR_180P:
     49       AddDataPackFromPath(GetResourcesPakFilePath(
     50           "chrome_touch_180_percent.pak"),
     51           SCALE_FACTOR_180P);
     52       force_touch_resources = true;
     53       break;
     54     case ui::SCALE_FACTOR_140P:
     55       AddDataPackFromPath(GetResourcesPakFilePath(
     56           "chrome_touch_140_percent.pak"),
     57           SCALE_FACTOR_140P);
     58       force_touch_resources = true;
     59   }
     60   // TODO(kevers|girard): Remove loading of 1x resources when in high-DPI
     61   // mode once all resources are available at 140% and 180%.
     62   if (ui::GetDisplayLayout() == ui::LAYOUT_TOUCH || force_touch_resources) {
     63     AddDataPackFromPath(
     64         GetResourcesPakFilePath("chrome_touch_100_percent.pak"),
     65         SCALE_FACTOR_100P);
     66   } else {
     67     AddDataPackFromPath(
     68         GetResourcesPakFilePath("chrome_100_percent.pak"),
     69         SCALE_FACTOR_100P);
     70   }
     71 }
     72 
     73 gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id, ImageRTL rtl) {
     74   // Flipped image is not used on Windows.
     75   DCHECK_EQ(rtl, RTL_DISABLED);
     76 
     77   // Windows only uses SkBitmap for gfx::Image, so this is the same as
     78   // GetImageNamed.
     79   return GetImageNamed(resource_id);
     80 }
     81 
     82 void SetResourcesDataDLL(HINSTANCE handle) {
     83   resources_data_dll = handle;
     84 }
     85 
     86 HICON LoadThemeIconFromResourcesDataDLL(int icon_id) {
     87   return ::LoadIcon(GetCurrentResourceDLL(), MAKEINTRESOURCE(icon_id));
     88 }
     89 
     90 }  // namespace ui;
     91