12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364 |
- // Copyright 2017 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 "ui/views/animation/ink_drop_util.h"
- #include <cmath>
- #include "base/check_op.h"
- #include "ui/gfx/geometry/point3_f.h"
- #include "ui/gfx/geometry/transform.h"
- #include "ui/gfx/geometry/vector2d_f.h"
- #include "ui/native_theme/native_theme.h"
- #include "ui/views/view.h"
- #include "ui/views/views_features.h"
- namespace views {
- gfx::Transform GetTransformSubpixelCorrection(const gfx::Transform& transform,
- float device_scale_factor) {
- gfx::Point3F origin;
- transform.TransformPoint(&origin);
- const gfx::Vector2dF offset_in_dip = origin.AsPointF().OffsetFromOrigin();
- // Scale the origin to screen space
- origin.Scale(device_scale_factor);
- // Compute the rounded offset in screen space and finally unscale it back to
- // DIP space.
- gfx::Vector2dF aligned_offset_in_dip = origin.AsPointF().OffsetFromOrigin();
- aligned_offset_in_dip.set_x(std::round(aligned_offset_in_dip.x()));
- aligned_offset_in_dip.set_y(std::round(aligned_offset_in_dip.y()));
- aligned_offset_in_dip.Scale(1.f / device_scale_factor);
- // Compute the subpixel offset correction and apply it to the transform.
- gfx::Transform subpixel_correction;
- subpixel_correction.Translate(aligned_offset_in_dip - offset_in_dip);
- #if DCHECK_IS_ON()
- const float kEpsilon = 0.0001f;
- gfx::Point3F offset;
- gfx::Transform transform_corrected(transform);
- transform_corrected.ConcatTransform(subpixel_correction);
- transform_corrected.TransformPoint(&offset);
- offset.Scale(device_scale_factor);
- if (!std::isnan(offset.x()))
- DCHECK_LT(std::abs(std::round(offset.x()) - offset.x()), kEpsilon);
- if (!std::isnan(offset.y()))
- DCHECK_LT(std::abs(std::round(offset.y()) - offset.y()), kEpsilon);
- #endif
- return subpixel_correction;
- }
- bool UsingPlatformHighContrastInkDrop(const View* view) {
- return view->GetWidget() &&
- view->GetNativeTheme()->GetDefaultSystemColorScheme() ==
- ui::NativeTheme::ColorScheme::kPlatformHighContrast &&
- base::FeatureList::IsEnabled(
- features::kEnablePlatformHighContrastInkDrop);
- }
- } // namespace views
|