1 // Copyright (c) 2013 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 <stdio.h>
6 #include <string>
7 #include <vector>
8
9 #include "ash/display/display_info.h"
10 #include "base/logging.h"
11 #include "base/strings/string_number_conversions.h"
12 #include "base/strings/string_util.h"
13 #include "base/strings/stringprintf.h"
14 #include "ui/gfx/display.h"
15 #include "ui/gfx/size_conversions.h"
16 #include "ui/gfx/size_f.h"
17
18 #if defined(OS_WIN)
19 #include "ui/aura/window_tree_host.h"
20 #endif
21
22 namespace ash {
23 namespace internal {
24
Resolution(const gfx::Size & size,bool interlaced)25 Resolution::Resolution(const gfx::Size& size, bool interlaced)
26 : size(size),
27 interlaced(interlaced) {
28 }
29
30 // satic
CreateFromSpec(const std::string & spec)31 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
32 return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
33 }
34
35 // static
CreateFromSpecWithID(const std::string & spec,int64 id)36 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
37 int64 id) {
38 // Default bounds for a display.
39 const int kDefaultHostWindowX = 200;
40 const int kDefaultHostWindowY = 200;
41 const int kDefaultHostWindowWidth = 1366;
42 const int kDefaultHostWindowHeight = 768;
43
44 // Use larger than max int to catch overflow early.
45 static int64 synthesized_display_id = 2200000000LL;
46
47 #if defined(OS_WIN)
48 gfx::Rect bounds_in_native(aura::RootWindowHost::GetNativeScreenSize());
49 #else
50 gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
51 kDefaultHostWindowWidth, kDefaultHostWindowHeight);
52 #endif
53 std::string main_spec = spec;
54
55 float ui_scale = 1.0f;
56 std::vector<std::string> parts;
57 if (Tokenize(main_spec, "@", &parts) == 2) {
58 double scale_in_double = 0;
59 if (base::StringToDouble(parts[1], &scale_in_double))
60 ui_scale = scale_in_double;
61 main_spec = parts[0];
62 }
63
64 size_t count = Tokenize(main_spec, "/", &parts);
65 gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
66 bool has_overscan = false;
67 if (count) {
68 main_spec = parts[0];
69 if (count >= 2) {
70 std::string options = parts[1];
71 for (size_t i = 0; i < options.size(); ++i) {
72 char c = options[i];
73 switch (c) {
74 case 'o':
75 has_overscan = true;
76 break;
77 case 'r': // rotate 90 degrees to 'right'.
78 rotation = gfx::Display::ROTATE_90;
79 break;
80 case 'u': // 180 degrees, 'u'pside-down.
81 rotation = gfx::Display::ROTATE_180;
82 break;
83 case 'l': // rotate 90 degrees to 'left'.
84 rotation = gfx::Display::ROTATE_270;
85 break;
86 }
87 }
88 }
89 }
90
91 int x = 0, y = 0, width, height;
92 float device_scale_factor = 1.0f;
93 if (sscanf(main_spec.c_str(), "%dx%d*%f",
94 &width, &height, &device_scale_factor) >= 2 ||
95 sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
96 &device_scale_factor) >= 4) {
97 bounds_in_native.SetRect(x, y, width, height);
98 }
99
100 std::vector<Resolution> resolutions;
101 if (Tokenize(main_spec, "#", &parts) == 2) {
102 main_spec = parts[0];
103 std::string resolution_list = parts[1];
104 count = Tokenize(resolution_list, "|", &parts);
105 for (size_t i = 0; i < count; ++i) {
106 std::string resolution = parts[i];
107 int width, height;
108 if (sscanf(resolution.c_str(), "%dx%d", &width, &height) == 2)
109 resolutions.push_back(Resolution(gfx::Size(width, height), false));
110 }
111 }
112
113 if (id == gfx::Display::kInvalidDisplayID)
114 id = synthesized_display_id++;
115 DisplayInfo display_info(
116 id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
117 display_info.set_device_scale_factor(device_scale_factor);
118 display_info.set_rotation(rotation);
119 display_info.set_configured_ui_scale(ui_scale);
120 display_info.SetBounds(bounds_in_native);
121 display_info.set_resolutions(resolutions);
122
123 // To test the overscan, it creates the default 5% overscan.
124 if (has_overscan) {
125 int width = bounds_in_native.width() / device_scale_factor / 40;
126 int height = bounds_in_native.height() / device_scale_factor / 40;
127 display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
128 display_info.UpdateDisplaySize();
129 }
130
131 DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
132 << ", spec=" << spec;
133 return display_info;
134 }
135
DisplayInfo()136 DisplayInfo::DisplayInfo()
137 : id_(gfx::Display::kInvalidDisplayID),
138 has_overscan_(false),
139 rotation_(gfx::Display::ROTATE_0),
140 touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
141 device_scale_factor_(1.0f),
142 overscan_insets_in_dip_(0, 0, 0, 0),
143 configured_ui_scale_(1.0f),
144 native_(false) {
145 }
146
DisplayInfo(int64 id,const std::string & name,bool has_overscan)147 DisplayInfo::DisplayInfo(int64 id,
148 const std::string& name,
149 bool has_overscan)
150 : id_(id),
151 name_(name),
152 has_overscan_(has_overscan),
153 rotation_(gfx::Display::ROTATE_0),
154 touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
155 device_scale_factor_(1.0f),
156 overscan_insets_in_dip_(0, 0, 0, 0),
157 configured_ui_scale_(1.0f),
158 native_(false) {
159 }
160
~DisplayInfo()161 DisplayInfo::~DisplayInfo() {
162 }
163
Copy(const DisplayInfo & native_info)164 void DisplayInfo::Copy(const DisplayInfo& native_info) {
165 DCHECK(id_ == native_info.id_);
166 name_ = native_info.name_;
167 has_overscan_ = native_info.has_overscan_;
168
169 DCHECK(!native_info.bounds_in_native_.IsEmpty());
170 bounds_in_native_ = native_info.bounds_in_native_;
171 size_in_pixel_ = native_info.size_in_pixel_;
172 device_scale_factor_ = native_info.device_scale_factor_;
173 resolutions_ = native_info.resolutions_;
174 touch_support_ = native_info.touch_support_;
175
176 // Copy overscan_insets_in_dip_ if it's not empty. This is for test
177 // cases which use "/o" annotation which sets the overscan inset
178 // to native, and that overscan has to be propagated. This does not
179 // happen on the real environment.
180 if (!native_info.overscan_insets_in_dip_.empty())
181 overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
182
183 // Rotation_ and ui_scale_ are given by preference, or unit
184 // tests. Don't copy if this native_info came from
185 // DisplayChangeObserver.
186 if (!native_info.native()) {
187 rotation_ = native_info.rotation_;
188 configured_ui_scale_ = native_info.configured_ui_scale_;
189 }
190 // Don't copy insets as it may be given by preference. |rotation_|
191 // is treated as a native so that it can be specified in
192 // |CreateFromSpec|.
193 }
194
SetBounds(const gfx::Rect & new_bounds_in_native)195 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
196 bounds_in_native_ = new_bounds_in_native;
197 size_in_pixel_ = new_bounds_in_native.size();
198 UpdateDisplaySize();
199 }
200
GetEffectiveUIScale() const201 float DisplayInfo::GetEffectiveUIScale() const {
202 if (device_scale_factor_ == 2.0f && configured_ui_scale_ == 2.0f)
203 return 1.0f;
204 return configured_ui_scale_;
205 }
206
UpdateDisplaySize()207 void DisplayInfo::UpdateDisplaySize() {
208 size_in_pixel_ = bounds_in_native_.size();
209 if (!overscan_insets_in_dip_.empty()) {
210 gfx::Insets insets_in_pixel =
211 overscan_insets_in_dip_.Scale(device_scale_factor_);
212 size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
213 } else {
214 overscan_insets_in_dip_.Set(0, 0, 0, 0);
215 }
216
217 if (rotation_ == gfx::Display::ROTATE_90 ||
218 rotation_ == gfx::Display::ROTATE_270)
219 size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
220 gfx::SizeF size_f(size_in_pixel_);
221 size_f.Scale(GetEffectiveUIScale());
222 size_in_pixel_ = gfx::ToFlooredSize(size_f);
223 }
224
SetOverscanInsets(const gfx::Insets & insets_in_dip)225 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
226 overscan_insets_in_dip_ = insets_in_dip;
227 }
228
GetOverscanInsetsInPixel() const229 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
230 return overscan_insets_in_dip_.Scale(device_scale_factor_);
231 }
232
ToString() const233 std::string DisplayInfo::ToString() const {
234 int rotation_degree = static_cast<int>(rotation_) * 90;
235 return base::StringPrintf(
236 "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
237 "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s",
238 static_cast<long long int>(id_),
239 bounds_in_native_.ToString().c_str(),
240 size_in_pixel_.ToString().c_str(),
241 device_scale_factor_,
242 overscan_insets_in_dip_.ToString().c_str(),
243 rotation_degree,
244 configured_ui_scale_,
245 touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE ? "yes" :
246 touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE ? "no" :
247 "unknown");
248 }
249
ToFullString() const250 std::string DisplayInfo::ToFullString() const {
251 std::string resolutions_str;
252 std::vector<Resolution>::const_iterator iter = resolutions_.begin();
253 for (; iter != resolutions_.end(); ++iter) {
254 if (!resolutions_str.empty())
255 resolutions_str += ",";
256 resolutions_str += iter->size.ToString();
257 if (iter->interlaced)
258 resolutions_str += "(i)";
259 }
260 return ToString() + ", resolutions=" + resolutions_str;
261 }
262
263 } // namespace internal
264 } // namespace ash
265