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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/ui/libgtk2ui/gtk2_ui.h" | 5 #include "chrome/browser/ui/libgtk2ui/gtk2_ui.h" |
6 | 6 |
| 7 #include <math.h> |
7 #include <set> | 8 #include <set> |
8 | 9 |
9 #include <pango/pango.h> | 10 #include <pango/pango.h> |
10 | 11 |
11 #include "base/command_line.h" | 12 #include "base/command_line.h" |
12 #include "base/debug/leak_annotations.h" | 13 #include "base/debug/leak_annotations.h" |
13 #include "base/environment.h" | 14 #include "base/environment.h" |
14 #include "base/i18n/rtl.h" | 15 #include "base/i18n/rtl.h" |
15 #include "base/logging.h" | 16 #include "base/logging.h" |
16 #include "base/nix/mime_util_xdg.h" | 17 #include "base/nix/mime_util_xdg.h" |
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373 LOG(WARNING) << "Unexpected gtk-xft-rgba \"" << rgba << "\""; | 374 LOG(WARNING) << "Unexpected gtk-xft-rgba \"" << rgba << "\""; |
374 params.subpixel_rendering = gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE; | 375 params.subpixel_rendering = gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE; |
375 } | 376 } |
376 | 377 |
377 g_free(hint_style); | 378 g_free(hint_style); |
378 g_free(rgba); | 379 g_free(rgba); |
379 | 380 |
380 return params; | 381 return params; |
381 } | 382 } |
382 | 383 |
383 // Queries GTK for its font DPI setting and returns the number of pixels in a | 384 double GetDPI() { |
384 // point. | |
385 double GetPixelsInPoint(float device_scale_factor) { | |
386 GtkSettings* gtk_settings = gtk_settings_get_default(); | 385 GtkSettings* gtk_settings = gtk_settings_get_default(); |
387 CHECK(gtk_settings); | 386 CHECK(gtk_settings); |
388 gint gtk_dpi = -1; | 387 gint gtk_dpi = -1; |
389 g_object_get(gtk_settings, "gtk-xft-dpi", >k_dpi, NULL); | 388 g_object_get(gtk_settings, "gtk-xft-dpi", >k_dpi, NULL); |
390 | 389 |
391 // GTK multiplies the DPI by 1024 before storing it. | 390 // GTK multiplies the DPI by 1024 before storing it. |
392 double dpi = (gtk_dpi > 0) ? gtk_dpi / 1024.0 : 96.0; | 391 return (gtk_dpi > 0) ? gtk_dpi / 1024.0 : 96.0; |
| 392 } |
| 393 |
| 394 // Queries GTK for its font DPI setting and returns the number of pixels in a |
| 395 // point. |
| 396 double GetPixelsInPoint(float device_scale_factor) { |
| 397 double dpi = GetDPI(); |
393 | 398 |
394 // Take device_scale_factor into account — if Chrome already scales the | 399 // Take device_scale_factor into account — if Chrome already scales the |
395 // entire UI up by 2x, we should not also scale up. | 400 // entire UI up by 2x, we should not also scale up. |
396 dpi /= device_scale_factor; | 401 dpi /= device_scale_factor; |
397 | 402 |
398 // There are 72 points in an inch. | 403 // There are 72 points in an inch. |
399 return dpi / 72.0; | 404 return dpi / 72.0; |
400 } | 405 } |
401 | 406 |
402 views::LinuxUI::NonClientMiddleClickAction GetDefaultMiddleClickAction() { | 407 views::LinuxUI::NonClientMiddleClickAction GetDefaultMiddleClickAction() { |
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1413 LoadGtkValues(); | 1418 LoadGtkValues(); |
1414 NativeThemeGtk2::instance()->NotifyObservers(); | 1419 NativeThemeGtk2::instance()->NotifyObservers(); |
1415 } | 1420 } |
1416 | 1421 |
1417 void Gtk2UI::UpdateDeviceScaleFactor(float device_scale_factor) { | 1422 void Gtk2UI::UpdateDeviceScaleFactor(float device_scale_factor) { |
1418 device_scale_factor_ = device_scale_factor; | 1423 device_scale_factor_ = device_scale_factor; |
1419 GtkStyle* label_style = gtk_rc_get_style(fake_label_.get()); | 1424 GtkStyle* label_style = gtk_rc_get_style(fake_label_.get()); |
1420 UpdateDefaultFont(label_style->font_desc); | 1425 UpdateDefaultFont(label_style->font_desc); |
1421 } | 1426 } |
1422 | 1427 |
| 1428 float Gtk2UI::GetDeviceScaleFactor() const { |
| 1429 const int kCSSDefaultDPI = 96; |
| 1430 float scale = GetDPI() / kCSSDefaultDPI; |
| 1431 // Round to 2 decimals, e.g. to 1.33. |
| 1432 return roundf(scale * 100) / 100; |
| 1433 } |
| 1434 |
1423 } // namespace libgtk2ui | 1435 } // namespace libgtk2ui |
1424 | 1436 |
1425 views::LinuxUI* BuildGtk2UI() { | 1437 views::LinuxUI* BuildGtk2UI() { |
1426 return new libgtk2ui::Gtk2UI; | 1438 return new libgtk2ui::Gtk2UI; |
1427 } | 1439 } |
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