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/layout.h" 6 7 #include <Cocoa/Cocoa.h> 8 9 #include "base/mac/sdk_forward_declarations.h" 10 11 namespace { 12 13 float GetScaleFactorScaleForNativeView(gfx::NativeView view) { 14 if (NSWindow* window = [view window]) { 15 if ([window respondsToSelector:@selector(backingScaleFactor)]) 16 return [window backingScaleFactor]; 17 return [window userSpaceScaleFactor]; 18 } 19 20 NSArray* screens = [NSScreen screens]; 21 if (![screens count]) 22 return 1.0f; 23 24 NSScreen* screen = [screens objectAtIndex:0]; 25 if ([screen respondsToSelector:@selector(backingScaleFactor)]) 26 return [screen backingScaleFactor]; 27 return [screen userSpaceScaleFactor]; 28 } 29 30 } // namespace 31 32 namespace ui { 33 34 float GetScaleFactorForNativeView(gfx::NativeView view) { 35 return GetScaleFactorScaleForNativeView(view); 36 } 37 38 } // namespace ui 39
