blob: fd2627bbc508dc171371e1f155e53998256ad8f8 [file] [log] [blame]
// 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.
#include <vector>
#include "base/macros.h"
#include "build/build_config.h"
#include "ui/base/resource/scale_factor.h"
#include "ui/base/ui_base_export.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.
UI_BASE_EXPORT void SetSupportedScaleFactors(
const std::vector<ScaleFactor>& scale_factors);
// Returns a vector with the scale factors which are supported by this
// platform, in ascending order.
UI_BASE_EXPORT const std::vector<ScaleFactor>& GetSupportedScaleFactors();
// Returns the supported ScaleFactor which most closely matches |scale|.
// Converting from float to ScaleFactor is inefficient and should be done as
// little as possible.
UI_BASE_EXPORT ScaleFactor GetSupportedScaleFactor(float image_scale);
// Returns the ScaleFactor used by |view|.
UI_BASE_EXPORT float GetScaleFactorForNativeView(gfx::NativeView view);
// Returns true if the scale passed in is the list of supported scales for
// the platform.
UI_BASE_EXPORT bool IsSupportedScale(float scale);
namespace test {
// Class which changes the value of GetSupportedScaleFactors() to
// |new_scale_factors| for the duration of its lifetime.
class UI_BASE_EXPORT ScopedSetSupportedScaleFactors {
explicit ScopedSetSupportedScaleFactors(
const std::vector<ui::ScaleFactor>& new_scale_factors);
std::vector<ui::ScaleFactor>* original_scale_factors_;
} // namespace test
} // namespace ui
#endif // UI_BASE_LAYOUT_H_