mirror of
https://github.com/RGBCube/serenity
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95d91a37d2
Refactor to resolve paint-only properties before painting, aiming to stop using layout nodes during recording of painting commands. Also adds a test, as we have not had any for outlines yet.
439 lines
22 KiB
C++
439 lines
22 KiB
C++
/*
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* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Layout/Viewport.h>
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#include <LibWeb/Painting/SVGPaintable.h>
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#include <LibWeb/Painting/SVGSVGPaintable.h>
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#include <LibWeb/Painting/StackingContext.h>
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#include <LibWeb/Painting/ViewportPaintable.h>
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namespace Web::Painting {
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JS::NonnullGCPtr<ViewportPaintable> ViewportPaintable::create(Layout::Viewport const& layout_viewport)
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{
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return layout_viewport.heap().allocate_without_realm<ViewportPaintable>(layout_viewport);
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}
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ViewportPaintable::ViewportPaintable(Layout::Viewport const& layout_viewport)
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: PaintableWithLines(layout_viewport)
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{
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}
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ViewportPaintable::~ViewportPaintable() = default;
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void ViewportPaintable::build_stacking_context_tree_if_needed()
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{
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if (stacking_context())
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return;
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build_stacking_context_tree();
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}
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void ViewportPaintable::build_stacking_context_tree()
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{
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set_stacking_context(make<StackingContext>(*this, nullptr, 0));
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size_t index_in_tree_order = 1;
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for_each_in_subtree([&](Paintable const& paintable) {
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const_cast<Paintable&>(paintable).invalidate_stacking_context();
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if (!paintable.layout_node().establishes_stacking_context()) {
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VERIFY(!paintable.stacking_context());
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return TraversalDecision::Continue;
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}
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auto* parent_context = const_cast<Paintable&>(paintable).enclosing_stacking_context();
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VERIFY(parent_context);
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const_cast<Paintable&>(paintable).set_stacking_context(make<Painting::StackingContext>(const_cast<Paintable&>(paintable), parent_context, index_in_tree_order++));
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return TraversalDecision::Continue;
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});
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stacking_context()->sort();
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}
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void ViewportPaintable::paint_all_phases(PaintContext& context)
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{
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build_stacking_context_tree_if_needed();
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context.recording_painter().translate(-context.device_viewport_rect().location().to_type<int>());
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stacking_context()->paint(context);
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}
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void ViewportPaintable::assign_scroll_frames()
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{
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int next_id = 0;
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for_each_in_subtree_of_type<PaintableBox>([&](auto const& paintable_box) {
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if (paintable_box.has_scrollable_overflow()) {
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auto scroll_frame = adopt_ref(*new ScrollFrame());
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scroll_frame->id = next_id++;
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scroll_state.set(&paintable_box, move(scroll_frame));
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}
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return TraversalDecision::Continue;
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});
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for_each_in_subtree([&](auto const& paintable) {
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for (auto block = paintable.containing_block(); block; block = block->containing_block()) {
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auto const& block_paintable_box = *block->paintable_box();
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if (auto scroll_frame = scroll_state.get(&block_paintable_box); scroll_frame.has_value()) {
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if (paintable.is_paintable_box()) {
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auto const& paintable_box = static_cast<PaintableBox const&>(paintable);
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const_cast<PaintableBox&>(paintable_box).set_enclosing_scroll_frame(scroll_frame.value());
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} else if (paintable.is_inline_paintable()) {
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auto const& inline_paintable = static_cast<InlinePaintable const&>(paintable);
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const_cast<InlinePaintable&>(inline_paintable).set_enclosing_scroll_frame(scroll_frame.value());
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}
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break;
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}
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}
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return TraversalDecision::Continue;
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});
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}
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void ViewportPaintable::assign_clip_frames()
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{
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for_each_in_subtree_of_type<PaintableBox>([&](auto const& paintable_box) {
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auto overflow_x = paintable_box.computed_values().overflow_x();
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auto overflow_y = paintable_box.computed_values().overflow_y();
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auto has_hidden_overflow = overflow_x != CSS::Overflow::Visible && overflow_y != CSS::Overflow::Visible;
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if (has_hidden_overflow || paintable_box.get_clip_rect().has_value()) {
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auto clip_frame = adopt_ref(*new ClipFrame());
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clip_state.set(&paintable_box, move(clip_frame));
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}
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return TraversalDecision::Continue;
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});
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for_each_in_subtree([&](auto const& paintable) {
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for (auto block = paintable.containing_block(); block; block = block->containing_block()) {
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auto const& block_paintable_box = *block->paintable_box();
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if (auto clip_frame = clip_state.get(&block_paintable_box); clip_frame.has_value()) {
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if (paintable.is_paintable_box()) {
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auto const& paintable_box = static_cast<PaintableBox const&>(paintable);
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const_cast<PaintableBox&>(paintable_box).set_enclosing_clip_frame(clip_frame.value());
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} else if (paintable.is_inline_paintable()) {
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auto const& inline_paintable = static_cast<InlinePaintable const&>(paintable);
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const_cast<InlinePaintable&>(inline_paintable).set_enclosing_clip_frame(clip_frame.value());
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}
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break;
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}
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}
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return TraversalDecision::Continue;
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});
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}
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void ViewportPaintable::refresh_scroll_state()
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{
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for (auto& it : scroll_state) {
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auto const& paintable_box = *it.key;
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auto& scroll_frame = *it.value;
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CSSPixelPoint offset;
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for (auto const* block = &paintable_box.layout_box(); block; block = block->containing_block()) {
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auto const& block_paintable_box = *block->paintable_box();
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offset.translate_by(block_paintable_box.scroll_offset());
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}
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scroll_frame.offset = -offset;
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}
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}
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void ViewportPaintable::refresh_clip_state()
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{
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for (auto& it : clip_state) {
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auto const& paintable_box = *it.key;
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auto& clip_frame = *it.value;
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auto overflow_x = paintable_box.computed_values().overflow_x();
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auto overflow_y = paintable_box.computed_values().overflow_y();
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// Start from CSS clip property if it exists.
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Optional<CSSPixelRect> clip_rect = paintable_box.get_clip_rect();
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if (overflow_x != CSS::Overflow::Visible && overflow_y != CSS::Overflow::Visible) {
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auto overflow_clip_rect = paintable_box.compute_absolute_padding_rect_with_css_transform_applied();
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for (auto const* block = &paintable_box.layout_box(); !block->is_viewport(); block = block->containing_block()) {
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auto const& block_paintable_box = *block->paintable_box();
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auto block_overflow_x = block_paintable_box.computed_values().overflow_x();
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auto block_overflow_y = block_paintable_box.computed_values().overflow_y();
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if (block_overflow_x != CSS::Overflow::Visible && block_overflow_y != CSS::Overflow::Visible) {
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auto rect = block_paintable_box.compute_absolute_padding_rect_with_css_transform_applied();
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overflow_clip_rect.intersect(rect);
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auto border_radii_data = block_paintable_box.normalized_border_radii_data(ShrinkRadiiForBorders::Yes);
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if (border_radii_data.has_any_radius()) {
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BorderRadiiClip border_radii_clip { .rect = rect, .radii = border_radii_data };
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clip_frame.add_border_radii_clip(border_radii_clip);
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}
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}
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if (auto css_clip_property_rect = block->paintable_box()->get_clip_rect(); css_clip_property_rect.has_value())
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overflow_clip_rect.intersect(css_clip_property_rect.value());
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}
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clip_rect = overflow_clip_rect;
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}
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clip_frame.set_rect(*clip_rect);
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}
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}
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static Painting::BorderRadiiData normalize_border_radii_data(Layout::Node const& node, CSSPixelRect const& rect, CSS::BorderRadiusData top_left_radius, CSS::BorderRadiusData top_right_radius, CSS::BorderRadiusData bottom_right_radius, CSS::BorderRadiusData bottom_left_radius)
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{
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Painting::BorderRadiusData bottom_left_radius_px {};
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Painting::BorderRadiusData bottom_right_radius_px {};
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Painting::BorderRadiusData top_left_radius_px {};
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Painting::BorderRadiusData top_right_radius_px {};
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bottom_left_radius_px.horizontal_radius = bottom_left_radius.horizontal_radius.to_px(node, rect.width());
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bottom_right_radius_px.horizontal_radius = bottom_right_radius.horizontal_radius.to_px(node, rect.width());
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top_left_radius_px.horizontal_radius = top_left_radius.horizontal_radius.to_px(node, rect.width());
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top_right_radius_px.horizontal_radius = top_right_radius.horizontal_radius.to_px(node, rect.width());
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bottom_left_radius_px.vertical_radius = bottom_left_radius.vertical_radius.to_px(node, rect.height());
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bottom_right_radius_px.vertical_radius = bottom_right_radius.vertical_radius.to_px(node, rect.height());
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top_left_radius_px.vertical_radius = top_left_radius.vertical_radius.to_px(node, rect.height());
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top_right_radius_px.vertical_radius = top_right_radius.vertical_radius.to_px(node, rect.height());
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// Scale overlapping curves according to https://www.w3.org/TR/css-backgrounds-3/#corner-overlap
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// Let f = min(Li/Si), where i ∈ {top, right, bottom, left},
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// Si is the sum of the two corresponding radii of the corners on side i,
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// and Ltop = Lbottom = the width of the box, and Lleft = Lright = the height of the box.
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auto l_top = rect.width();
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auto l_bottom = l_top;
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auto l_left = rect.height();
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auto l_right = l_left;
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auto s_top = (top_left_radius_px.horizontal_radius + top_right_radius_px.horizontal_radius);
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auto s_right = (top_right_radius_px.vertical_radius + bottom_right_radius_px.vertical_radius);
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auto s_bottom = (bottom_left_radius_px.horizontal_radius + bottom_right_radius_px.horizontal_radius);
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auto s_left = (top_left_radius_px.vertical_radius + bottom_left_radius_px.vertical_radius);
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CSSPixelFraction f = 1;
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f = (s_top != 0) ? min(f, l_top / s_top) : f;
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f = (s_right != 0) ? min(f, l_right / s_right) : f;
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f = (s_bottom != 0) ? min(f, l_bottom / s_bottom) : f;
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f = (s_left != 0) ? min(f, l_left / s_left) : f;
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// If f < 1, then all corner radii are reduced by multiplying them by f.
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if (f < 1) {
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top_left_radius_px.horizontal_radius *= f;
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top_left_radius_px.vertical_radius *= f;
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top_right_radius_px.horizontal_radius *= f;
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top_right_radius_px.vertical_radius *= f;
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bottom_right_radius_px.horizontal_radius *= f;
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bottom_right_radius_px.vertical_radius *= f;
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bottom_left_radius_px.horizontal_radius *= f;
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bottom_left_radius_px.vertical_radius *= f;
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}
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return Painting::BorderRadiiData { top_left_radius_px, top_right_radius_px, bottom_right_radius_px, bottom_left_radius_px };
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}
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void ViewportPaintable::resolve_paint_only_properties()
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{
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// Resolves layout-dependent properties not handled during layout and stores them in the paint tree.
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// Properties resolved include:
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// - Border radii
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// - Box shadows
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// - Text shadows
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// - Transforms
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// - Transform origins
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// - Outlines
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for_each_in_inclusive_subtree([&](Paintable& paintable) {
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auto& node = paintable.layout_node();
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auto const is_inline_paintable = paintable.is_inline_paintable();
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auto const is_paintable_box = paintable.is_paintable_box();
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auto const is_paintable_with_lines = paintable.is_paintable_with_lines();
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// Border radii
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if (is_inline_paintable) {
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auto& inline_paintable = static_cast<Painting::InlinePaintable&>(paintable);
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auto& fragments = inline_paintable.fragments();
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auto const& top_left_border_radius = inline_paintable.computed_values().border_top_left_radius();
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auto const& top_right_border_radius = inline_paintable.computed_values().border_top_right_radius();
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auto const& bottom_right_border_radius = inline_paintable.computed_values().border_bottom_right_radius();
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auto const& bottom_left_border_radius = inline_paintable.computed_values().border_bottom_left_radius();
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auto containing_block_position_in_absolute_coordinates = inline_paintable.containing_block()->paintable_box()->absolute_position();
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for (size_t i = 0; i < fragments.size(); ++i) {
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auto is_first_fragment = i == 0;
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auto is_last_fragment = i == fragments.size() - 1;
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auto& fragment = fragments[i];
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CSSPixelRect absolute_fragment_rect {
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containing_block_position_in_absolute_coordinates.translated(fragment.offset()),
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fragment.size()
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};
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if (is_first_fragment) {
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auto extra_start_width = inline_paintable.box_model().padding.left;
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absolute_fragment_rect.translate_by(-extra_start_width, 0);
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absolute_fragment_rect.set_width(absolute_fragment_rect.width() + extra_start_width);
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}
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if (is_last_fragment) {
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auto extra_end_width = inline_paintable.box_model().padding.right;
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absolute_fragment_rect.set_width(absolute_fragment_rect.width() + extra_end_width);
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}
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auto border_radii_data = normalize_border_radii_data(inline_paintable.layout_node(),
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absolute_fragment_rect, top_left_border_radius,
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top_right_border_radius,
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bottom_right_border_radius,
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bottom_left_border_radius);
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fragment.set_border_radii_data(border_radii_data);
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}
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}
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// Border radii
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if (is_paintable_box) {
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auto& paintable_box = static_cast<Painting::PaintableBox&>(paintable);
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CSSPixelRect const border_rect { 0, 0, paintable_box.border_box_width(), paintable_box.border_box_height() };
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auto const& border_top_left_radius = node.computed_values().border_top_left_radius();
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auto const& border_top_right_radius = node.computed_values().border_top_right_radius();
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auto const& border_bottom_right_radius = node.computed_values().border_bottom_right_radius();
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auto const& border_bottom_left_radius = node.computed_values().border_bottom_left_radius();
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auto radii_data = normalize_border_radii_data(node, border_rect, border_top_left_radius,
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border_top_right_radius, border_bottom_right_radius,
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border_bottom_left_radius);
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paintable_box.set_border_radii_data(radii_data);
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}
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// Box shadows
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auto const& box_shadow_data = node.computed_values().box_shadow();
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if (!box_shadow_data.is_empty()) {
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Vector<Painting::ShadowData> resolved_box_shadow_data;
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resolved_box_shadow_data.ensure_capacity(box_shadow_data.size());
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for (auto const& layer : box_shadow_data) {
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resolved_box_shadow_data.empend(
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layer.color,
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layer.offset_x.to_px(node),
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layer.offset_y.to_px(node),
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layer.blur_radius.to_px(node),
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layer.spread_distance.to_px(node),
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layer.placement == CSS::ShadowPlacement::Outer ? Painting::ShadowPlacement::Outer
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: Painting::ShadowPlacement::Inner);
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}
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if (is<Painting::PaintableBox>(paintable)) {
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auto& paintable_box = static_cast<Painting::PaintableBox&>(paintable);
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paintable_box.set_box_shadow_data(move(resolved_box_shadow_data));
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} else if (is<Painting::InlinePaintable>(paintable)) {
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auto& inline_paintable = static_cast<Painting::InlinePaintable&>(paintable);
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inline_paintable.set_box_shadow_data(move(resolved_box_shadow_data));
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}
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}
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// Text shadows
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if (is_paintable_with_lines) {
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auto const& paintable_with_lines = static_cast<Painting::PaintableWithLines const&>(paintable);
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for (auto const& fragment : paintable_with_lines.fragments()) {
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auto const& text_shadow = fragment.m_layout_node->computed_values().text_shadow();
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if (!text_shadow.is_empty()) {
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Vector<Painting::ShadowData> resolved_shadow_data;
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resolved_shadow_data.ensure_capacity(text_shadow.size());
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for (auto const& layer : text_shadow) {
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resolved_shadow_data.empend(
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layer.color,
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layer.offset_x.to_px(paintable_with_lines.layout_node()),
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layer.offset_y.to_px(paintable_with_lines.layout_node()),
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layer.blur_radius.to_px(paintable_with_lines.layout_node()),
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layer.spread_distance.to_px(paintable_with_lines.layout_node()),
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Painting::ShadowPlacement::Outer);
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}
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const_cast<Painting::PaintableFragment&>(fragment).set_shadows(move(resolved_shadow_data));
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}
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}
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}
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// Transform and transform origin
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if (is_paintable_box) {
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auto& paintable_box = static_cast<Painting::PaintableBox&>(paintable);
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auto const& transformations = paintable_box.computed_values().transformations();
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if (!transformations.is_empty()) {
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auto matrix = Gfx::FloatMatrix4x4::identity();
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for (auto const& transform : transformations)
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matrix = matrix * transform.to_matrix(paintable_box).release_value();
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paintable_box.set_transform(matrix);
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}
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auto const& transform_origin = paintable_box.computed_values().transform_origin();
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// https://www.w3.org/TR/css-transforms-1/#transform-box
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auto transform_box = paintable_box.computed_values().transform_box();
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// For SVG elements without associated CSS layout box, the used value for content-box is fill-box and for
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// border-box is stroke-box.
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// FIXME: This currently detects any SVG element except the <svg> one. Is that correct?
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// And is it correct to use `else` below?
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if (is<Painting::SVGPaintable>(paintable_box)) {
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switch (transform_box) {
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case CSS::TransformBox::ContentBox:
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transform_box = CSS::TransformBox::FillBox;
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break;
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case CSS::TransformBox::BorderBox:
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transform_box = CSS::TransformBox::StrokeBox;
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break;
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default:
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break;
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}
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}
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// For elements with associated CSS layout box, the used value for fill-box is content-box and for
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// stroke-box and view-box is border-box.
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else {
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switch (transform_box) {
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case CSS::TransformBox::FillBox:
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transform_box = CSS::TransformBox::ContentBox;
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break;
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case CSS::TransformBox::StrokeBox:
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case CSS::TransformBox::ViewBox:
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transform_box = CSS::TransformBox::BorderBox;
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break;
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default:
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break;
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}
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}
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CSSPixelRect reference_box = [&]() {
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switch (transform_box) {
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case CSS::TransformBox::ContentBox:
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// Uses the content box as reference box.
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// FIXME: The reference box of a table is the border box of its table wrapper box, not its table box.
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return paintable_box.absolute_rect();
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case CSS::TransformBox::BorderBox:
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// Uses the border box as reference box.
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// FIXME: The reference box of a table is the border box of its table wrapper box, not its table box.
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return paintable_box.absolute_border_box_rect();
|
|
case CSS::TransformBox::FillBox:
|
|
// Uses the object bounding box as reference box.
|
|
// FIXME: For now we're using the content rect as an approximation.
|
|
return paintable_box.absolute_rect();
|
|
case CSS::TransformBox::StrokeBox:
|
|
// Uses the stroke bounding box as reference box.
|
|
// FIXME: For now we're using the border rect as an approximation.
|
|
return paintable_box.absolute_border_box_rect();
|
|
case CSS::TransformBox::ViewBox:
|
|
// Uses the nearest SVG viewport as reference box.
|
|
// FIXME: If a viewBox attribute is specified for the SVG viewport creating element:
|
|
// - The reference box is positioned at the origin of the coordinate system established by the viewBox attribute.
|
|
// - The dimension of the reference box is set to the width and height values of the viewBox attribute.
|
|
auto* svg_paintable = paintable_box.first_ancestor_of_type<Painting::SVGSVGPaintable>();
|
|
if (!svg_paintable)
|
|
return paintable_box.absolute_border_box_rect();
|
|
return svg_paintable->absolute_rect();
|
|
}
|
|
VERIFY_NOT_REACHED();
|
|
}();
|
|
auto x = reference_box.left() + transform_origin.x.to_px(node, reference_box.width());
|
|
auto y = reference_box.top() + transform_origin.y.to_px(node, reference_box.height());
|
|
paintable_box.set_transform_origin({ x, y });
|
|
paintable_box.set_transform_origin({ x, y });
|
|
}
|
|
|
|
// Outlines
|
|
auto const& computed_values = node.computed_values();
|
|
auto outline_width = computed_values.outline_width().to_px(node);
|
|
auto outline_data = borders_data_for_outline(node, computed_values.outline_color(), computed_values.outline_style(), outline_width);
|
|
auto outline_offset = computed_values.outline_offset().to_px(node);
|
|
if (is_paintable_box) {
|
|
auto& paintable_box = static_cast<Painting::PaintableBox&>(paintable);
|
|
paintable_box.set_outline_data(outline_data);
|
|
paintable_box.set_outline_offset(outline_offset);
|
|
} else if (is_inline_paintable) {
|
|
auto& inline_paintable = static_cast<Painting::InlinePaintable&>(paintable);
|
|
inline_paintable.set_outline_data(outline_data);
|
|
inline_paintable.set_outline_offset(outline_offset);
|
|
}
|
|
|
|
return TraversalDecision::Continue;
|
|
});
|
|
}
|
|
|
|
}
|