// 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(paint_recording_bounds_.width()) / static_cast(bounds.size().width()); } if (bounds.size().height() > 0) { paint_recording_scale_y_ = static_cast(paint_recording_bounds_.height()) / static_cast(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