mirror of
https://github.com/RGBCube/serenity
synced 2025-05-22 18:35:18 +00:00
29ff1f67be
Currently, in CPU painter, border painting is implemented by building a Gfx::Path that is filled by Gfx::AntiAliasingPainter. In the GPU painter, we will likely want to do something different, and with a special command, it becomes possible. Also, by making this change, the CPU executor also benefits because now we can skip building paths for borders that are out of the viewport.
443 lines
24 KiB
C++
443 lines
24 KiB
C++
/*
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* Copyright (c) 2023, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/HashMap.h>
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#include <AK/QuickSort.h>
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#include <AK/Traits.h>
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#include <LibWeb/Layout/TableFormattingContext.h>
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#include <LibWeb/Painting/PaintableBox.h>
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#include <LibWeb/Painting/TableBordersPainting.h>
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struct CellCoordinates {
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size_t row_index;
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size_t column_index;
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bool operator==(CellCoordinates const& other) const
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{
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return row_index == other.row_index && column_index == other.column_index;
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}
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};
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namespace AK {
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template<>
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struct Traits<CellCoordinates> : public DefaultTraits<CellCoordinates> {
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static unsigned hash(CellCoordinates const& key) { return pair_int_hash(key.row_index, key.column_index); }
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};
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}
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namespace Web::Painting {
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static void collect_cell_boxes(Vector<PaintableBox const&>& cell_boxes, PaintableBox const& table_paintable)
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{
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table_paintable.for_each_child_of_type<PaintableBox>([&](auto& child) {
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if (child.display().is_table_cell()) {
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cell_boxes.append(child);
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} else {
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collect_cell_boxes(cell_boxes, child);
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}
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return TraversalDecision::Continue;
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});
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}
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enum class EdgeDirection {
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Horizontal,
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Vertical,
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};
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struct DeviceBorderData {
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Color color { Color::Transparent };
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CSS::LineStyle line_style { CSS::LineStyle::None };
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DevicePixels width { 0 };
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};
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struct DeviceBorderDataWithElementKind {
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DeviceBorderData border_data;
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Painting::PaintableBox::ConflictingElementKind element_kind { Painting::PaintableBox::ConflictingElementKind::Cell };
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};
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struct DeviceBordersDataWithElementKind {
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DeviceBorderDataWithElementKind top;
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DeviceBorderDataWithElementKind right;
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DeviceBorderDataWithElementKind bottom;
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DeviceBorderDataWithElementKind left;
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};
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struct BorderEdgePaintingInfo {
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DevicePixelRect rect;
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DeviceBorderDataWithElementKind border_data_with_element_kind;
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EdgeDirection direction;
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Optional<size_t> row;
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Optional<size_t> column;
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};
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static Optional<size_t> row_index_for_element_kind(size_t index, Painting::PaintableBox::ConflictingElementKind element_kind)
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{
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switch (element_kind) {
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case Painting::PaintableBox::ConflictingElementKind::Cell:
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case Painting::PaintableBox::ConflictingElementKind::Row:
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case Painting::PaintableBox::ConflictingElementKind::RowGroup: {
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return index;
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}
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default:
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return {};
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}
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}
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static Optional<size_t> column_index_for_element_kind(size_t index, Painting::PaintableBox::ConflictingElementKind element_kind)
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{
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switch (element_kind) {
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case Painting::PaintableBox::ConflictingElementKind::Cell:
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case Painting::PaintableBox::ConflictingElementKind::Column:
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case Painting::PaintableBox::ConflictingElementKind::ColumnGroup: {
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return index;
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}
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default:
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return {};
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}
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}
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static DevicePixels half_ceil(DevicePixels width)
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{
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return ceil(static_cast<double>(width.value()) / 2);
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}
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static DevicePixels half_floor(DevicePixels width)
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{
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return floor(static_cast<double>(width.value()) / 2);
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}
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static BorderEdgePaintingInfo make_right_cell_edge(
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DevicePixelRect const& right_cell_rect,
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DevicePixelRect const& cell_rect,
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DeviceBordersDataWithElementKind const& borders_data,
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CellCoordinates const& coordinates)
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{
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auto connect_top_offset = half_ceil(borders_data.top.border_data.width);
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auto connect_excess_height = connect_top_offset + half_floor(borders_data.bottom.border_data.width);
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DevicePixelRect right_border_rect = {
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right_cell_rect.x() - half_ceil(borders_data.right.border_data.width),
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cell_rect.y() - connect_top_offset,
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borders_data.right.border_data.width,
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max(cell_rect.height(), right_cell_rect.height()) + connect_excess_height,
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};
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return BorderEdgePaintingInfo {
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.rect = right_border_rect,
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.border_data_with_element_kind = borders_data.right,
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.direction = EdgeDirection::Vertical,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.right.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.right.element_kind),
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};
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}
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static BorderEdgePaintingInfo make_down_cell_edge(
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DevicePixelRect const& down_cell_rect,
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DevicePixelRect const& cell_rect,
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DeviceBordersDataWithElementKind const& borders_data,
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CellCoordinates const& coordinates)
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{
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auto connect_left_offset = half_ceil(borders_data.left.border_data.width);
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auto connect_excess_width = connect_left_offset + half_floor(borders_data.right.border_data.width);
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DevicePixelRect down_border_rect = {
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cell_rect.x() - connect_left_offset,
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down_cell_rect.y() - half_ceil(borders_data.bottom.border_data.width),
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max(cell_rect.width(), down_cell_rect.width()) + connect_excess_width,
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borders_data.bottom.border_data.width,
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};
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return BorderEdgePaintingInfo {
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.rect = down_border_rect,
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.border_data_with_element_kind = borders_data.bottom,
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.direction = EdgeDirection::Horizontal,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.bottom.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.bottom.element_kind),
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};
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}
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static BorderEdgePaintingInfo make_first_row_top_cell_edge(DevicePixelRect const& cell_rect, DeviceBordersDataWithElementKind const& borders_data, CellCoordinates const& coordinates)
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{
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auto connect_left_offset = half_ceil(borders_data.left.border_data.width.value());
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auto connect_excess_width = connect_left_offset + half_floor(borders_data.right.border_data.width.value());
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DevicePixelRect top_border_rect = {
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cell_rect.x() - connect_left_offset,
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cell_rect.y() - half_ceil(borders_data.top.border_data.width.value()),
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cell_rect.width() + connect_excess_width,
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borders_data.top.border_data.width,
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};
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return BorderEdgePaintingInfo {
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.rect = top_border_rect,
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.border_data_with_element_kind = borders_data.top,
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.direction = EdgeDirection::Horizontal,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.top.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.top.element_kind),
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};
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}
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static BorderEdgePaintingInfo make_last_row_bottom_cell_edge(DevicePixelRect const& cell_rect, DeviceBordersDataWithElementKind const& borders_data, CellCoordinates const& coordinates)
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{
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auto connect_left_offset = half_ceil(borders_data.left.border_data.width);
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auto connect_excess_width = connect_left_offset + half_floor(borders_data.right.border_data.width);
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DevicePixelRect bottom_border_rect = {
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cell_rect.x() - connect_left_offset,
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cell_rect.y() + cell_rect.height() - half_ceil(borders_data.bottom.border_data.width),
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cell_rect.width() + connect_excess_width,
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borders_data.bottom.border_data.width,
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};
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return BorderEdgePaintingInfo {
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.rect = bottom_border_rect,
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.border_data_with_element_kind = borders_data.bottom,
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.direction = EdgeDirection::Horizontal,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.bottom.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.bottom.element_kind),
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};
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}
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static BorderEdgePaintingInfo make_first_column_left_cell_edge(DevicePixelRect const& cell_rect, DeviceBordersDataWithElementKind const& borders_data, CellCoordinates const& coordinates)
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{
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auto connect_top_offset = half_ceil(borders_data.top.border_data.width);
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auto connect_excess_height = connect_top_offset + half_floor(borders_data.bottom.border_data.width);
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DevicePixelRect left_border_rect = {
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cell_rect.x() - half_ceil(borders_data.left.border_data.width),
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cell_rect.y() - connect_top_offset,
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borders_data.left.border_data.width,
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cell_rect.height() + connect_excess_height,
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};
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return BorderEdgePaintingInfo {
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.rect = left_border_rect,
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.border_data_with_element_kind = borders_data.left,
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.direction = EdgeDirection::Vertical,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.left.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.left.element_kind),
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};
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}
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static BorderEdgePaintingInfo make_last_column_right_cell_edge(DevicePixelRect const& cell_rect, DeviceBordersDataWithElementKind const& borders_data, CellCoordinates const& coordinates)
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{
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auto connect_top_offset = half_ceil(borders_data.top.border_data.width);
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auto connect_excess_height = connect_top_offset + half_floor(borders_data.bottom.border_data.width);
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DevicePixelRect right_border_rect = {
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cell_rect.x() + cell_rect.width() - half_ceil(borders_data.right.border_data.width),
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cell_rect.y() - connect_top_offset,
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borders_data.right.border_data.width,
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cell_rect.height() + connect_excess_height,
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};
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return BorderEdgePaintingInfo {
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.rect = right_border_rect,
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.border_data_with_element_kind = borders_data.right,
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.direction = EdgeDirection::Vertical,
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.row = row_index_for_element_kind(coordinates.row_index, borders_data.right.element_kind),
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.column = column_index_for_element_kind(coordinates.column_index, borders_data.right.element_kind),
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};
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}
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static CSS::BorderData css_border_data_from_device_border_data(DeviceBorderData const& device_border_data)
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{
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return CSS::BorderData {
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.color = device_border_data.color,
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.line_style = device_border_data.line_style,
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.width = device_border_data.width.value(),
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};
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}
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static void paint_collected_edges(PaintContext& context, Vector<BorderEdgePaintingInfo>& border_edge_painting_info_list)
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{
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// This sorting step isn't part of the specification, but it matches the behavior of other browsers at border intersections, which aren't
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// part of border conflict resolution in the specification but it's still desirable to handle them in a way which is consistent with it.
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// See https://www.w3.org/TR/CSS22/tables.html#border-conflict-resolution for reference.
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quick_sort(border_edge_painting_info_list, [](auto const& a, auto const& b) {
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auto const& a_border_data = a.border_data_with_element_kind.border_data;
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auto const& b_border_data = b.border_data_with_element_kind.border_data;
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if (a_border_data.line_style == b_border_data.line_style && a_border_data.width == b_border_data.width) {
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if (b.border_data_with_element_kind.element_kind < a.border_data_with_element_kind.element_kind) {
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return true;
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} else if (b.border_data_with_element_kind.element_kind > a.border_data_with_element_kind.element_kind) {
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return false;
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}
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// Here the element kind is the same, thus the coordinates are either both set or not set.
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VERIFY(a.column.has_value() == b.column.has_value());
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VERIFY(a.row.has_value() == b.row.has_value());
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if (a.column.has_value()) {
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if (b.column.value() < a.column.value()) {
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return true;
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} else if (b.column.value() > a.column.value()) {
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return false;
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}
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}
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return a.row.has_value() ? b.row.value() < a.row.value() : false;
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}
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return Layout::TableFormattingContext::border_is_less_specific(
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css_border_data_from_device_border_data(a_border_data),
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css_border_data_from_device_border_data(b_border_data));
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});
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for (auto const& border_edge_painting_info : border_edge_painting_info_list) {
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auto const& border_data_with_element_kind = border_edge_painting_info.border_data_with_element_kind;
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auto width = border_data_with_element_kind.border_data.width;
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if (width <= 0)
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continue;
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auto color = border_data_with_element_kind.border_data.color;
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auto border_style = border_data_with_element_kind.border_data.line_style;
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auto p1 = border_edge_painting_info.rect.top_left();
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auto p2 = border_edge_painting_info.direction == EdgeDirection::Horizontal
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? border_edge_painting_info.rect.top_right()
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: border_edge_painting_info.rect.bottom_left();
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if (border_style == CSS::LineStyle::Dotted) {
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context.painter().draw_line(p1.to_type<int>(), p2.to_type<int>(), color, width.value(), Gfx::Painter::LineStyle::Dotted);
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} else if (border_style == CSS::LineStyle::Dashed) {
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context.painter().draw_line(p1.to_type<int>(), p2.to_type<int>(), color, width.value(), Gfx::Painter::LineStyle::Dashed);
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} else {
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// FIXME: Support the remaining line styles instead of rendering them as solid.
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context.painter().fill_rect(Gfx::IntRect(border_edge_painting_info.rect.location(), border_edge_painting_info.rect.size()), color);
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}
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}
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}
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static HashMap<CellCoordinates, DevicePixelRect> snap_cells_to_device_coordinates(HashMap<CellCoordinates, PaintableBox const*> const& cell_coordinates_to_box, size_t row_count, size_t column_count, PaintContext const& context)
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{
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Vector<DevicePixels> y_line_start_coordinates;
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Vector<DevicePixels> y_line_end_coordinates;
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y_line_start_coordinates.resize(row_count + 1);
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y_line_end_coordinates.resize(row_count + 1);
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Vector<DevicePixels> x_line_start_coordinates;
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Vector<DevicePixels> x_line_end_coordinates;
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x_line_start_coordinates.resize(column_count + 1);
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x_line_end_coordinates.resize(column_count + 1);
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for (auto const& kv : cell_coordinates_to_box) {
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auto const& cell_box = kv.value;
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auto start_row_index = cell_box->table_cell_coordinates()->row_index;
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auto end_row_index = start_row_index + cell_box->table_cell_coordinates()->row_span;
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auto cell_rect = cell_box->absolute_border_box_rect();
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y_line_start_coordinates[start_row_index] = max(context.rounded_device_pixels(cell_rect.y()), y_line_start_coordinates[start_row_index]);
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y_line_end_coordinates[end_row_index] = max(context.rounded_device_pixels(cell_rect.y() + cell_rect.height()), y_line_end_coordinates[end_row_index]);
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auto start_column_index = cell_box->table_cell_coordinates()->column_index;
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auto end_column_index = start_column_index + cell_box->table_cell_coordinates()->column_span;
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x_line_start_coordinates[start_column_index] = max(context.rounded_device_pixels(cell_rect.x()), x_line_start_coordinates[start_column_index]);
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x_line_end_coordinates[end_column_index] = max(context.rounded_device_pixels(cell_rect.x() + cell_rect.width()), x_line_end_coordinates[end_column_index]);
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}
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HashMap<CellCoordinates, DevicePixelRect> cell_coordinates_to_device_rect;
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for (auto const& kv : cell_coordinates_to_box) {
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auto const& cell_box = kv.value;
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auto start_row_index = cell_box->table_cell_coordinates()->row_index;
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auto end_row_index = start_row_index + cell_box->table_cell_coordinates()->row_span;
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auto height = y_line_end_coordinates[end_row_index] - y_line_start_coordinates[start_row_index];
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auto start_column_index = cell_box->table_cell_coordinates()->column_index;
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auto end_column_index = start_column_index + cell_box->table_cell_coordinates()->column_span;
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auto width = x_line_end_coordinates[end_column_index] - x_line_start_coordinates[start_column_index];
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cell_coordinates_to_device_rect.set(kv.key, DevicePixelRect { x_line_start_coordinates[start_column_index], y_line_start_coordinates[start_row_index], width, height });
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}
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return cell_coordinates_to_device_rect;
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}
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static DeviceBorderDataWithElementKind device_border_data_from_css_border_data(Painting::PaintableBox::BorderDataWithElementKind const& border_data_with_element_kind, PaintContext const& context)
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{
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return DeviceBorderDataWithElementKind {
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.border_data = {
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.color = border_data_with_element_kind.border_data.color,
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.line_style = border_data_with_element_kind.border_data.line_style,
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.width = context.rounded_device_pixels(border_data_with_element_kind.border_data.width),
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},
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.element_kind = border_data_with_element_kind.element_kind,
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};
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}
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static void paint_separate_cell_borders(PaintableBox const& cell_box, HashMap<CellCoordinates, DevicePixelRect> const& cell_coordinates_to_device_rect, PaintContext& context)
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{
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auto borders_data = cell_box.override_borders_data().has_value() ? PaintableBox::remove_element_kind_from_borders_data(cell_box.override_borders_data().value()) : BordersData {
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.top = cell_box.box_model().border.top == 0 ? CSS::BorderData() : cell_box.computed_values().border_top(),
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.right = cell_box.box_model().border.right == 0 ? CSS::BorderData() : cell_box.computed_values().border_right(),
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.bottom = cell_box.box_model().border.bottom == 0 ? CSS::BorderData() : cell_box.computed_values().border_bottom(),
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.left = cell_box.box_model().border.left == 0 ? CSS::BorderData() : cell_box.computed_values().border_left(),
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};
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auto cell_rect = cell_coordinates_to_device_rect.get({ cell_box.table_cell_coordinates()->row_index, cell_box.table_cell_coordinates()->column_index }).value();
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context.painter().paint_borders(cell_rect, cell_box.normalized_border_radii_data().as_corners(context), borders_data.to_device_pixels(context));
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}
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void paint_table_borders(PaintContext& context, PaintableBox const& table_paintable)
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{
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// Partial implementation of painting according to the collapsing border model:
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// https://www.w3.org/TR/CSS22/tables.html#collapsing-borders
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Vector<PaintableBox const&> cell_boxes;
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collect_cell_boxes(cell_boxes, table_paintable);
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Vector<BorderEdgePaintingInfo> border_edge_painting_info_list;
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HashMap<CellCoordinates, PaintableBox const*> cell_coordinates_to_box;
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size_t row_count = 0;
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size_t column_count = 0;
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for (auto const& cell_box : cell_boxes) {
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cell_coordinates_to_box.set(CellCoordinates {
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.row_index = cell_box.table_cell_coordinates()->row_index,
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.column_index = cell_box.table_cell_coordinates()->column_index },
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&cell_box);
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row_count = max(row_count, cell_box.table_cell_coordinates()->row_index + cell_box.table_cell_coordinates()->row_span);
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column_count = max(column_count, cell_box.table_cell_coordinates()->column_index + cell_box.table_cell_coordinates()->column_span);
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}
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auto cell_coordinates_to_device_rect = snap_cells_to_device_coordinates(cell_coordinates_to_box, row_count, column_count, context);
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|
for (auto const& cell_box : cell_boxes) {
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|
if (cell_box.computed_values().border_collapse() == CSS::BorderCollapse::Separate) {
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|
paint_separate_cell_borders(cell_box, cell_coordinates_to_device_rect, context);
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|
continue;
|
|
}
|
|
auto css_borders_data = cell_box.override_borders_data().has_value() ? cell_box.override_borders_data().value() : PaintableBox::BordersDataWithElementKind {
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.top = { .border_data = cell_box.box_model().border.top == 0 ? CSS::BorderData() : cell_box.computed_values().border_top(), .element_kind = PaintableBox::ConflictingElementKind::Cell },
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|
.right = { .border_data = cell_box.box_model().border.right == 0 ? CSS::BorderData() : cell_box.computed_values().border_right(), .element_kind = PaintableBox::ConflictingElementKind::Cell },
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|
.bottom = { .border_data = cell_box.box_model().border.bottom == 0 ? CSS::BorderData() : cell_box.computed_values().border_bottom(), .element_kind = PaintableBox::ConflictingElementKind::Cell },
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|
.left = { .border_data = cell_box.box_model().border.left == 0 ? CSS::BorderData() : cell_box.computed_values().border_left(), .element_kind = PaintableBox::ConflictingElementKind::Cell },
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|
};
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|
DeviceBordersDataWithElementKind borders_data = {
|
|
.top = device_border_data_from_css_border_data(css_borders_data.top, context),
|
|
.right = device_border_data_from_css_border_data(css_borders_data.right, context),
|
|
.bottom = device_border_data_from_css_border_data(css_borders_data.bottom, context),
|
|
.left = device_border_data_from_css_border_data(css_borders_data.left, context),
|
|
};
|
|
auto cell_rect = cell_coordinates_to_device_rect.get({ cell_box.table_cell_coordinates()->row_index, cell_box.table_cell_coordinates()->column_index }).value();
|
|
CellCoordinates right_cell_coordinates {
|
|
.row_index = cell_box.table_cell_coordinates()->row_index,
|
|
.column_index = cell_box.table_cell_coordinates()->column_index + cell_box.table_cell_coordinates()->column_span
|
|
};
|
|
auto maybe_right_cell = cell_coordinates_to_device_rect.get(right_cell_coordinates);
|
|
CellCoordinates down_cell_coordinates {
|
|
.row_index = cell_box.table_cell_coordinates()->row_index + cell_box.table_cell_coordinates()->row_span,
|
|
.column_index = cell_box.table_cell_coordinates()->column_index
|
|
};
|
|
auto maybe_down_cell = cell_coordinates_to_device_rect.get(down_cell_coordinates);
|
|
if (maybe_right_cell.has_value())
|
|
border_edge_painting_info_list.append(make_right_cell_edge(maybe_right_cell.value(), cell_rect, borders_data, right_cell_coordinates));
|
|
if (maybe_down_cell.has_value())
|
|
border_edge_painting_info_list.append(make_down_cell_edge(maybe_down_cell.value(), cell_rect, borders_data, down_cell_coordinates));
|
|
if (cell_box.table_cell_coordinates()->row_index == 0)
|
|
border_edge_painting_info_list.append(make_first_row_top_cell_edge(cell_rect, borders_data,
|
|
{ .row_index = 0, .column_index = cell_box.table_cell_coordinates()->column_index }));
|
|
if (cell_box.table_cell_coordinates()->row_index + cell_box.table_cell_coordinates()->row_span == row_count)
|
|
border_edge_painting_info_list.append(make_last_row_bottom_cell_edge(cell_rect, borders_data,
|
|
{ .row_index = row_count - 1, .column_index = cell_box.table_cell_coordinates()->column_index }));
|
|
if (cell_box.table_cell_coordinates()->column_index == 0)
|
|
border_edge_painting_info_list.append(make_first_column_left_cell_edge(cell_rect, borders_data,
|
|
{ .row_index = cell_box.table_cell_coordinates()->row_index, .column_index = 0 }));
|
|
if (cell_box.table_cell_coordinates()->column_index + cell_box.table_cell_coordinates()->column_span == column_count)
|
|
border_edge_painting_info_list.append(make_last_column_right_cell_edge(cell_rect, borders_data,
|
|
{ .row_index = cell_box.table_cell_coordinates()->row_index, .column_index = column_count - 1 }));
|
|
}
|
|
|
|
paint_collected_edges(context, border_edge_painting_info_list);
|
|
|
|
for (auto const& cell_box : cell_boxes) {
|
|
auto const& border_radii_data = cell_box.normalized_border_radii_data();
|
|
auto top_left = border_radii_data.top_left.as_corner(context);
|
|
auto top_right = border_radii_data.top_right.as_corner(context);
|
|
auto bottom_right = border_radii_data.bottom_right.as_corner(context);
|
|
auto bottom_left = border_radii_data.bottom_left.as_corner(context);
|
|
if (!top_left && !top_right && !bottom_left && !bottom_right) {
|
|
continue;
|
|
} else {
|
|
auto borders_data = cell_box.override_borders_data().has_value() ? PaintableBox::remove_element_kind_from_borders_data(cell_box.override_borders_data().value()) : BordersData {
|
|
.top = cell_box.box_model().border.top == 0 ? CSS::BorderData() : cell_box.computed_values().border_top(),
|
|
.right = cell_box.box_model().border.right == 0 ? CSS::BorderData() : cell_box.computed_values().border_right(),
|
|
.bottom = cell_box.box_model().border.bottom == 0 ? CSS::BorderData() : cell_box.computed_values().border_bottom(),
|
|
.left = cell_box.box_model().border.left == 0 ? CSS::BorderData() : cell_box.computed_values().border_left(),
|
|
};
|
|
context.painter().paint_borders(context.rounded_device_rect(cell_box.absolute_border_box_rect()), cell_box.normalized_border_radii_data().as_corners(context), borders_data.to_device_pixels(context));
|
|
}
|
|
}
|
|
}
|
|
}
|