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| 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 <algorithm> | |
| 8 #include <cmath> | |
| 9 #include <limits> | |
| 10 | |
| 11 #include "base/basictypes.h" | |
| 12 #include "base/command_line.h" | |
| 13 #include "base/logging.h" | |
| 14 #include "build/build_config.h" | |
| 15 #include "ui/base/touch/touch_device.h" | |
| 16 #include "ui/base/ui_base_switches.h" | |
| 17 #include "ui/gfx/display.h" | |
| 18 #include "ui/gfx/image/image_skia.h" | |
| 19 #include "ui/gfx/screen.h" | |
| 20 | |
| 21 #if defined(OS_WIN) | |
| 22 #include "base/win/metro.h" | |
| 23 #include "ui/gfx/win/dpi.h" | |
| 24 #include <Windows.h> | |
| 25 #endif // defined(OS_WIN) | |
| 26 | |
| 27 namespace ui { | |
| 28 | |
| 29 namespace { | |
| 30 | |
| 31 bool ScaleFactorComparator(const ScaleFactor& lhs, const ScaleFactor& rhs){ | |
| 32 return GetScaleForScaleFactor(lhs) < GetScaleForScaleFactor(rhs); | |
| 33 } | |
| 34 | |
| 35 std::vector<ScaleFactor>* g_supported_scale_factors = NULL; | |
| 36 | |
| 37 const float kScaleFactorScales[] = {1.0f, 1.0f, 1.25f, 1.33f, 1.4f, 1.5f, 1.8f, | |
| 38 2.0f, 2.5f, 3.0f}; | |
| 39 COMPILE_ASSERT(NUM_SCALE_FACTORS == arraysize(kScaleFactorScales), | |
| 40 kScaleFactorScales_incorrect_size); | |
| 41 | |
| 42 } // namespace | |
| 43 | |
| 44 void SetSupportedScaleFactors( | |
| 45 const std::vector<ui::ScaleFactor>& scale_factors) { | |
| 46 if (g_supported_scale_factors != NULL) | |
| 47 delete g_supported_scale_factors; | |
| 48 | |
| 49 g_supported_scale_factors = new std::vector<ScaleFactor>(scale_factors); | |
| 50 std::sort(g_supported_scale_factors->begin(), | |
| 51 g_supported_scale_factors->end(), | |
| 52 ScaleFactorComparator); | |
| 53 | |
| 54 // Set ImageSkia's supported scales. | |
| 55 std::vector<float> scales; | |
| 56 for (std::vector<ScaleFactor>::const_iterator it = | |
| 57 g_supported_scale_factors->begin(); | |
| 58 it != g_supported_scale_factors->end(); ++it) { | |
| 59 scales.push_back(kScaleFactorScales[*it]); | |
| 60 } | |
| 61 gfx::ImageSkia::SetSupportedScales(scales); | |
| 62 } | |
| 63 | |
| 64 const std::vector<ScaleFactor>& GetSupportedScaleFactors() { | |
| 65 DCHECK(g_supported_scale_factors != NULL); | |
| 66 return *g_supported_scale_factors; | |
| 67 } | |
| 68 | |
| 69 ScaleFactor GetSupportedScaleFactor(float scale) { | |
| 70 DCHECK(g_supported_scale_factors != NULL); | |
| 71 ScaleFactor closest_match = SCALE_FACTOR_100P; | |
| 72 float smallest_diff = std::numeric_limits<float>::max(); | |
| 73 for (size_t i = 0; i < g_supported_scale_factors->size(); ++i) { | |
| 74 ScaleFactor scale_factor = (*g_supported_scale_factors)[i]; | |
| 75 float diff = std::abs(kScaleFactorScales[scale_factor] - scale); | |
| 76 if (diff < smallest_diff) { | |
| 77 closest_match = scale_factor; | |
| 78 smallest_diff = diff; | |
| 79 } | |
| 80 } | |
| 81 DCHECK_NE(closest_match, SCALE_FACTOR_NONE); | |
| 82 return closest_match; | |
| 83 } | |
| 84 | |
| 85 float GetImageScale(ScaleFactor scale_factor) { | |
| 86 #if defined(OS_WIN) | |
| 87 if (gfx::IsHighDPIEnabled()) | |
| 88 return gfx::win::GetDeviceScaleFactor(); | |
| 89 #endif | |
| 90 return GetScaleForScaleFactor(scale_factor); | |
| 91 } | |
| 92 | |
| 93 float GetScaleForScaleFactor(ScaleFactor scale_factor) { | |
| 94 return kScaleFactorScales[scale_factor]; | |
| 95 } | |
| 96 | |
| 97 namespace test { | |
| 98 | |
| 99 ScopedSetSupportedScaleFactors::ScopedSetSupportedScaleFactors( | |
| 100 const std::vector<ui::ScaleFactor>& new_scale_factors) { | |
| 101 if (g_supported_scale_factors) { | |
| 102 original_scale_factors_ = | |
| 103 new std::vector<ScaleFactor>(*g_supported_scale_factors); | |
| 104 } else { | |
| 105 original_scale_factors_ = NULL; | |
| 106 } | |
| 107 SetSupportedScaleFactors(new_scale_factors); | |
| 108 } | |
| 109 | |
| 110 ScopedSetSupportedScaleFactors::~ScopedSetSupportedScaleFactors() { | |
| 111 if (original_scale_factors_) { | |
| 112 SetSupportedScaleFactors(*original_scale_factors_); | |
| 113 delete original_scale_factors_; | |
| 114 } else { | |
| 115 delete g_supported_scale_factors; | |
| 116 g_supported_scale_factors = NULL; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 } // namespace test | |
| 121 | |
| 122 #if !defined(OS_MACOSX) | |
| 123 float GetScaleFactorForNativeView(gfx::NativeView view) { | |
| 124 gfx::Screen* screen = gfx::Screen::GetScreenFor(view); | |
| 125 if (screen->IsDIPEnabled()) { | |
| 126 gfx::Display display = screen->GetDisplayNearestWindow(view); | |
| 127 return display.device_scale_factor(); | |
| 128 } | |
| 129 return 1.0f; | |
| 130 } | |
| 131 #endif // !defined(OS_MACOSX) | |
| 132 | |
| 133 } // namespace ui | |
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Chromium Code Reviews
Issue 854713003:
More old files deletion. (Closed)
Base URL: https://github.com/domokit/mojo.git@master