| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_BASE_LAYOUT_H_ |
| #define UI_BASE_LAYOUT_H_ |
| |
| #include <vector> |
| |
| #include "base/component_export.h" |
| #include "base/memory/raw_ptr.h" |
| #include "build/build_config.h" |
| #include "ui/base/resource/resource_scale_factor.h" |
| #include "ui/gfx/native_widget_types.h" |
| |
| namespace ui { |
| |
| // Changes the value of GetSupportedScaleFactors() to |scale_factors|. |
| // Use ScopedSetSupportedScaleFactors for unit tests as not to affect the |
| // state of other tests. |
| COMPONENT_EXPORT(UI_BASE) |
| void SetSupportedResourceScaleFactors( |
| const std::vector<ResourceScaleFactor>& scale_factors); |
| |
| // Returns a vector with the scale factors which are supported by this |
| // platform, in ascending order. |
| COMPONENT_EXPORT(UI_BASE) |
| const std::vector<ResourceScaleFactor>& GetSupportedResourceScaleFactors(); |
| |
| // Returns the supported ResourceScaleFactor which most closely matches |scale|. |
| // Converting from float to ResourceScaleFactor is inefficient and should be |
| // done as little as possible. |
| COMPONENT_EXPORT(UI_BASE) |
| ResourceScaleFactor GetSupportedResourceScaleFactor(float image_scale); |
| |
| // Returns the ResourceScaleFactor used by |view|. |
| COMPONENT_EXPORT(UI_BASE) |
| float GetScaleFactorForNativeView(gfx::NativeView view); |
| |
| // Returns true if the scale passed in is the list of supported scales for |
| // the platform. |
| // TODO(oshima): Deprecate this. |
| COMPONENT_EXPORT(UI_BASE) bool IsSupportedScale(float scale); |
| |
| namespace test { |
| // Class which changes the value of GetSupportedResourceScaleFactors() to |
| // |new_scale_factors| for the duration of its lifetime. |
| class COMPONENT_EXPORT(UI_BASE) ScopedSetSupportedResourceScaleFactors { |
| public: |
| explicit ScopedSetSupportedResourceScaleFactors( |
| const std::vector<ResourceScaleFactor>& new_scale_factors); |
| ScopedSetSupportedResourceScaleFactors( |
| const ScopedSetSupportedResourceScaleFactors&) = delete; |
| ScopedSetSupportedResourceScaleFactors& operator=( |
| const ScopedSetSupportedResourceScaleFactors&) = delete; |
| ~ScopedSetSupportedResourceScaleFactors(); |
| |
| private: |
| raw_ptr<std::vector<ResourceScaleFactor>> original_scale_factors_; |
| }; |
| |
| } // namespace test |
| |
| } // namespace ui |
| |
| #endif // UI_BASE_LAYOUT_H_ |