1// Copyright 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.h"
6
7#import <QuartzCore/QuartzCore.h>
8#import <UIKit/UIKit.h>
9
10#include "base/files/file_path.h"
11#include "base/files/file_util.h"
12#include "base/mac/bundle_locations.h"
13#include "base/mac/foundation_util.h"
14#include "base/mac/scoped_nsobject.h"
15#include "base/memory/ref_counted_memory.h"
16#include "base/notreached.h"
17#include "base/strings/sys_string_conversions.h"
18#include "base/synchronization/lock.h"
19#include "ui/base/resource/resource_handle.h"
20#include "ui/gfx/image/image.h"
21
22namespace ui {
23
24namespace {
25
26base::FilePath GetResourcesPakFilePath(NSString* name, NSString* mac_locale) {
27  NSString *resource_path;
28  if ([mac_locale length]) {
29    resource_path = [base::mac::FrameworkBundle() pathForResource:name
30                                                           ofType:@"pak"
31                                                      inDirectory:@""
32                                                  forLocalization:mac_locale];
33  } else {
34    resource_path = [base::mac::FrameworkBundle() pathForResource:name
35                                                           ofType:@"pak"];
36  }
37  if (!resource_path) {
38    // Return just the name of the pak file.
39    return base::FilePath(base::SysNSStringToUTF8(name) + ".pak");
40  }
41  return base::FilePath([resource_path fileSystemRepresentation]);
42}
43
44}  // namespace
45
46void ResourceBundle::LoadCommonResources() {
47  if (IsScaleFactorSupported(SCALE_FACTOR_100P)) {
48    AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_100_percent", nil),
49                        SCALE_FACTOR_100P);
50  }
51
52  if (IsScaleFactorSupported(SCALE_FACTOR_200P)) {
53    AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_200_percent", nil),
54                        SCALE_FACTOR_200P);
55  }
56
57  if (IsScaleFactorSupported(SCALE_FACTOR_300P)) {
58    AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_300_percent", nil),
59                        SCALE_FACTOR_300P);
60  }
61}
62
63// static
64base::FilePath ResourceBundle::GetLocaleFilePath(
65    const std::string& app_locale) {
66  NSString* mac_locale = base::SysUTF8ToNSString(app_locale);
67
68  // iOS uses "_" instead of "-", so swap to get a iOS-style value.
69  mac_locale = [mac_locale stringByReplacingOccurrencesOfString:@"-"
70                                                     withString:@"_"];
71
72  // On disk, the "en_US" resources are just "en" (http://crbug.com/25578).
73  if ([mac_locale isEqual:@"en_US"])
74    mac_locale = @"en";
75
76  base::FilePath locale_file_path =
77      GetResourcesPakFilePath(@"locale", mac_locale);
78
79  if (HasSharedInstance() && GetSharedInstance().delegate_) {
80    locale_file_path = GetSharedInstance().delegate_->GetPathForLocalePack(
81        locale_file_path, app_locale);
82  }
83
84  // Don't try to load from paths that are not absolute.
85  return locale_file_path.IsAbsolute() ? locale_file_path : base::FilePath();
86}
87
88gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id) {
89  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
90
91  // Check to see if the image is already in the cache.
92  ImageMap::iterator found = images_.find(resource_id);
93  if (found != images_.end()) {
94    return found->second;
95  }
96
97  gfx::Image image;
98  if (delegate_)
99    image = delegate_->GetNativeImageNamed(resource_id);
100
101  if (image.IsEmpty()) {
102    // Load the raw data from the resource pack at the current supported scale
103    // factor.  This code assumes that only one of the possible scale factors is
104    // supported at runtime, based on the device resolution.
105    ui::ScaleFactor scale_factor = GetMaxScaleFactor();
106
107    scoped_refptr<base::RefCountedMemory> data(
108        LoadDataResourceBytesForScale(resource_id, scale_factor));
109
110    if (!data.get()) {
111      LOG(WARNING) << "Unable to load image with id " << resource_id;
112      return GetEmptyImage();
113    }
114
115    // Create a data object from the raw bytes.
116    base::scoped_nsobject<NSData> ns_data(
117        [[NSData alloc] initWithBytes:data->front() length:data->size()]);
118
119    bool is_fallback = PNGContainsFallbackMarker(data->front(), data->size());
120    // Create the image from the data.
121    CGFloat target_scale = ui::GetScaleForScaleFactor(scale_factor);
122    CGFloat source_scale = is_fallback ? 1.0 : target_scale;
123    base::scoped_nsobject<UIImage> ui_image(
124        [[UIImage alloc] initWithData:ns_data scale:source_scale]);
125
126    // If the image is a 1x fallback, scale it up to a full-size representation.
127    if (is_fallback) {
128      CGSize source_size = [ui_image size];
129      CGSize target_size = CGSizeMake(source_size.width * target_scale,
130                                      source_size.height * target_scale);
131      base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
132          CGColorSpaceCreateDeviceRGB());
133      base::ScopedCFTypeRef<CGContextRef> context(CGBitmapContextCreate(
134          NULL,
135          target_size.width,
136          target_size.height,
137          8,
138          target_size.width * 4,
139          color_space,
140          kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
141
142      CGRect target_rect = CGRectMake(0, 0,
143                                      target_size.width, target_size.height);
144      CGContextSetBlendMode(context, kCGBlendModeCopy);
145      CGContextDrawImage(context, target_rect, [ui_image CGImage]);
146
147      base::ScopedCFTypeRef<CGImageRef> cg_image(
148          CGBitmapContextCreateImage(context));
149      ui_image.reset([[UIImage alloc] initWithCGImage:cg_image
150                                                scale:target_scale
151                                          orientation:UIImageOrientationUp]);
152    }
153
154    if (!ui_image.get()) {
155      LOG(WARNING) << "Unable to load image with id " << resource_id;
156      NOTREACHED();  // Want to assert in debug mode.
157      return GetEmptyImage();
158    }
159
160    image = gfx::Image(ui_image);
161  }
162
163  auto inserted = images_.emplace(resource_id, image);
164  DCHECK(inserted.second);
165  return inserted.first->second;
166}
167
168}  // namespace ui
169