src/ui/base/resource/resource_bundle_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/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 "skia/ext/image_operations.h"
  11 #include "ui/base/layout.h"
  12 #include "ui/base/resource/resource_bundle.h"
  13 #include "ui/base/resource/resource_data_dll_win.h"
  14 #include "ui/gfx/geometry/size_conversions.h"
  15 #include "ui/gfx/image/image_skia.h"
  16 #include "ui/gfx/image/image_skia_source.h"
  17 #include "ui/gfx/win/dpi.h"
  18
  19 namespace ui {
  20
  21 namespace {
  22
  23 HINSTANCE resources_data_dll;
  24
  25 HINSTANCE GetCurrentResourceDLL() {
  26   if (resources_data_dll)
  27     return resources_data_dll;
  28   return GetModuleHandle(NULL);
  29 }
  30
  31 base::FilePath GetResourcesPakFilePath(const std::string& pak_name) {
  32   base::FilePath path;
  33   if (PathService::Get(base::DIR_MODULE, &path))
  34     return path.AppendASCII(pak_name.c_str());
  35
  36   // Return just the name of the pack file.
  37   return base::FilePath(base::ASCIIToUTF16(pak_name));
  38 }
  39
  40 }  // namespace
  41
  42 void ResourceBundle::LoadCommonResources() {
  43   // As a convenience, add the current resource module as a data packs.
  44   data_packs_.push_back(new ResourceDataDLL(GetCurrentResourceDLL()));
  45
  46   if (IsScaleFactorSupported(SCALE_FACTOR_100P)) {
  47     AddDataPackFromPath(
  48         GetResourcesPakFilePath("chrome_100_percent.pak"),
  49         SCALE_FACTOR_100P);
  50   }
  51   if (IsScaleFactorSupported(SCALE_FACTOR_200P)) {
  52     DCHECK(gfx::IsHighDPIEnabled());
  53     AddDataPackFromPath(
  54         GetResourcesPakFilePath("chrome_200_percent.pak"),
  55         SCALE_FACTOR_200P);
  56   }
  57 }
  58
  59 gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id, ImageRTL rtl) {
  60   // Flipped image is not used on Windows.
  61   DCHECK_EQ(rtl, RTL_DISABLED);
  62
  63   // Windows only uses SkBitmap for gfx::Image, so this is the same as
  64   // GetImageNamed.
  65   return GetImageNamed(resource_id);
  66 }
  67
  68 // static
  69 SkBitmap ResourceBundle::PlatformScaleImage(const SkBitmap& image,
  70                                             float loaded_image_scale,
  71                                             float desired_bitmap_scale) {
  72   if (!gfx::IsHighDPIEnabled())
  73     return image;
  74
  75   // On Windows we can have multiple device scales like 1/1.25/1.5/2, etc.
  76   // We only have 1x and 2x data packs. We need to scale the bitmaps
  77   // accordingly.
  78   if (loaded_image_scale == desired_bitmap_scale)
  79     return image;
  80
  81   SkBitmap scaled_image;
  82   gfx::Size unscaled_size(image.width(), image.height());
  83   gfx::Size scaled_size = ToCeiledSize(
  84       gfx::ScaleSize(unscaled_size,
  85                       desired_bitmap_scale / loaded_image_scale));
  86   scaled_image = skia::ImageOperations::Resize(
  87       image,
  88       skia::ImageOperations::RESIZE_LANCZOS3,
  89       scaled_size.width(),
  90       scaled_size.height());
  91   DCHECK_EQ(scaled_image.width(), scaled_size.width());
  92   DCHECK_EQ(scaled_image.height(), scaled_size.height());
  93   return scaled_image;
  94 }
  95
  96 void SetResourcesDataDLL(HINSTANCE handle) {
  97   resources_data_dll = handle;
  98 }
  99
 100 HICON LoadThemeIconFromResourcesDataDLL(int icon_id) {
 101   return ::LoadIcon(GetCurrentResourceDLL(), MAKEINTRESOURCE(icon_id));
 102 }
 103
 104 }  // namespace ui;