| // 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/paint_info.h" |
| #include "base/feature_list.h" |
| #include "ui/views/views_features.h" |
| |
| namespace views { |
| namespace { |
| |
| gfx::Rect GetSnappedRecordingBoundsInternal( |
| const gfx::Rect& paint_recording_bounds, |
| float device_scale_factor, |
| const gfx::Size& parent_size, |
| const gfx::Rect& child_bounds) { |
| const gfx::Vector2d& child_origin = child_bounds.OffsetFromOrigin(); |
| |
| int right = child_origin.x() + child_bounds.width(); |
| int bottom = child_origin.y() + child_bounds.height(); |
| |
| int new_x = std::round(child_origin.x() * device_scale_factor); |
| int new_y = std::round(child_origin.y() * device_scale_factor); |
| |
| int new_right; |
| int new_bottom; |
| |
| bool empty = paint_recording_bounds.IsEmpty(); |
| |
| if (right == parent_size.width() && !empty) |
| new_right = paint_recording_bounds.width(); |
| else |
| new_right = std::round(right * device_scale_factor); |
| |
| if (bottom == parent_size.height() && !empty) |
| new_bottom = paint_recording_bounds.height(); |
| else |
| new_bottom = std::round(bottom * device_scale_factor); |
| |
| return gfx::Rect(new_x + paint_recording_bounds.x(), |
| new_y + paint_recording_bounds.y(), new_right - new_x, |
| new_bottom - new_y); |
| } |
| |
| // Layer's paint info should use the corner scaling logic to compute |
| // the recording which is what Views uses to compte the view's |
| // paint_recording_bounds_, with exception that a view touches the right/bottom |
| // edges of the parent, and its layer has to be able to paint to these |
| // edges. Such cases should be handled case by case basis. |
| gfx::Rect GetViewsLayerRecordingBounds(const ui::PaintContext& context, |
| const gfx::Rect& child_bounds) { |
| if (!context.is_pixel_canvas()) |
| return gfx::Rect(child_bounds.size()); |
| return gfx::Rect(GetSnappedRecordingBoundsInternal( |
| gfx::Rect(), context.device_scale_factor(), |
| gfx::Size() /* not used */, child_bounds) |
| .size()); |
| } |
| |
| } // namespace |
| |
| // static |
| PaintInfo PaintInfo::CreateRootPaintInfo(const ui::PaintContext& root_context, |
| const gfx::Size& size) { |
| return PaintInfo(root_context, size); |
| } |
| |
| // static |
| PaintInfo PaintInfo::CreateChildPaintInfo(const PaintInfo& parent_paint_info, |
| const gfx::Rect& bounds, |
| const gfx::Size& parent_size, |
| ScaleType scale_type, |
| bool is_layer, |
| bool needs_paint) { |
| return PaintInfo(parent_paint_info, bounds, parent_size, scale_type, is_layer, |
| needs_paint); |
| } |
| |
| PaintInfo::~PaintInfo() = default; |
| |
| bool PaintInfo::IsPixelCanvas() const { |
| return context().is_pixel_canvas(); |
| } |
| |
| bool PaintInfo::ShouldPaint() const { |
| if (base::FeatureList::IsEnabled(features::kEnableViewPaintOptimization)) |
| return needs_paint_; |
| |
| return context().IsRectInvalid(gfx::Rect(paint_recording_size())); |
| } |
| |
| PaintInfo::PaintInfo(const PaintInfo& other) |
| : paint_recording_scale_x_(other.paint_recording_scale_x_), |
| paint_recording_scale_y_(other.paint_recording_scale_y_), |
| paint_recording_bounds_(other.paint_recording_bounds_), |
| offset_from_parent_(other.offset_from_parent_), |
| context_(other.context(), gfx::Vector2d()), |
| root_context_(nullptr) {} |
| |
| // The root layer should use the ScaleToEnclosingRect, the same logic that |
| // cc(chrome compositor) is using. |
| PaintInfo::PaintInfo(const ui::PaintContext& root_context, |
| const gfx::Size& size) |
| : paint_recording_scale_x_(root_context.is_pixel_canvas() |
| ? root_context.device_scale_factor() |
| : 1.f), |
| paint_recording_scale_y_(paint_recording_scale_x_), |
| paint_recording_bounds_( |
| gfx::ScaleToEnclosingRect(gfx::Rect(size), paint_recording_scale_x_)), |
| context_(root_context, gfx::Vector2d()), |
| root_context_(&root_context) {} |
| |
| PaintInfo::PaintInfo(const PaintInfo& parent_paint_info, |
| const gfx::Rect& bounds, |
| const gfx::Size& parent_size, |
| ScaleType scale_type, |
| bool is_layer, |
| bool needs_paint) |
| : paint_recording_scale_x_(1.f), |
| paint_recording_scale_y_(1.f), |
| paint_recording_bounds_( |
| is_layer ? GetViewsLayerRecordingBounds(parent_paint_info.context(), |
| bounds) |
| : parent_paint_info.GetSnappedRecordingBounds(parent_size, |
| bounds)), |
| offset_from_parent_( |
| paint_recording_bounds_.OffsetFromOrigin() - |
| parent_paint_info.paint_recording_bounds_.OffsetFromOrigin()), |
| context_(parent_paint_info.context(), offset_from_parent_), |
| root_context_(nullptr), |
| needs_paint_(needs_paint) { |
| if (IsPixelCanvas()) { |
| if (scale_type == ScaleType::kUniformScaling) { |
| paint_recording_scale_x_ = paint_recording_scale_y_ = |
| context().device_scale_factor(); |
| } else if (scale_type == ScaleType::kScaleWithEdgeSnapping) { |
| if (bounds.size().width() > 0) { |
| paint_recording_scale_x_ = |
| static_cast<float>(paint_recording_bounds_.width()) / |
| static_cast<float>(bounds.size().width()); |
| } |
| if (bounds.size().height() > 0) { |
| paint_recording_scale_y_ = |
| static_cast<float>(paint_recording_bounds_.height()) / |
| static_cast<float>(bounds.size().height()); |
| } |
| } |
| } |
| } |
| |
| gfx::Rect PaintInfo::GetSnappedRecordingBounds( |
| const gfx::Size& parent_size, |
| const gfx::Rect& child_bounds) const { |
| if (!IsPixelCanvas()) |
| return (child_bounds + paint_recording_bounds_.OffsetFromOrigin()); |
| |
| return GetSnappedRecordingBoundsInternal(paint_recording_bounds_, |
| context().device_scale_factor(), |
| parent_size, child_bounds); |
| } |
| |
| } // namespace views |