LibWeb: Merge StrokePathUsingPaintStyle and StrokePathUsingColor

Use `Variant<PaintStyle, Gfx::Color>` in new `StrokePath` instead of
duplicating two almost identical display list items.

Libraries/LibWeb/Forward.h

@@ -9,6 +9,7 @@
 
 #include <AK/DistinctNumeric.h>
 #include <AK/Variant.h>
+#include <LibGfx/Forward.h>
 #include <LibIPC/Forward.h>
 #include <LibJS/Forward.h>
 
@@ -42,6 +43,7 @@ class DisplayListRecorder;
 class SVGGradientPaintStyle;
 class ScrollStateSnapshot;
 using PaintStyle = RefPtr<SVGGradientPaintStyle>;
+using PaintStyleOrColor = Variant<PaintStyle, Gfx::Color>;
 using ScrollStateSnapshotByDisplayList = HashMap<NonnullRefPtr<DisplayList>, ScrollStateSnapshot>;
 
 }

Libraries/LibWeb/Painting/DisplayList.cpp

@@ -216,8 +216,7 @@ void DisplayListPlayer::execute_impl(DisplayList& display_list, ScrollStateSnaps
         else HANDLE_COMMAND(FillRectWithRoundedCorners, fill_rect_with_rounded_corners)
         else HANDLE_COMMAND(FillPathUsingColor, fill_path_using_color)
         else HANDLE_COMMAND(FillPathUsingPaintStyle, fill_path_using_paint_style)
-        else HANDLE_COMMAND(StrokePathUsingColor, stroke_path_using_color)
-        else HANDLE_COMMAND(StrokePathUsingPaintStyle, stroke_path_using_paint_style)
+        else HANDLE_COMMAND(StrokePath, stroke_path)
         else HANDLE_COMMAND(DrawEllipse, draw_ellipse)
         else HANDLE_COMMAND(FillEllipse, fill_ellipse)
         else HANDLE_COMMAND(DrawLine, draw_line)

Libraries/LibWeb/Painting/DisplayList.h

@@ -57,8 +57,7 @@ private:
     virtual void fill_rect_with_rounded_corners(FillRectWithRoundedCorners const&) = 0;
     virtual void fill_path_using_color(FillPathUsingColor const&) = 0;
     virtual void fill_path_using_paint_style(FillPathUsingPaintStyle const&) = 0;
-    virtual void stroke_path_using_color(StrokePathUsingColor const&) = 0;
-    virtual void stroke_path_using_paint_style(StrokePathUsingPaintStyle const&) = 0;
+    virtual void stroke_path(StrokePath const&) = 0;
     virtual void draw_ellipse(DrawEllipse const&) = 0;
     virtual void fill_ellipse(FillEllipse const&) = 0;
     virtual void draw_line(DrawLine const&) = 0;

Libraries/LibWeb/Painting/DisplayListCommand.cpp

@@ -147,14 +147,9 @@ void FillPathUsingPaintStyle::dump(StringBuilder& builder) const
     builder.appendff("FillPathUsingPaintStyle");
 }
 
-void StrokePathUsingColor::dump(StringBuilder& builder) const
+void StrokePath::dump(StringBuilder& builder) const
 {
-    builder.appendff("StrokePathUsingColor");
-}
-
-void StrokePathUsingPaintStyle::dump(StringBuilder& builder) const
-{
-    builder.appendff("StrokePathUsingPaintStyle");
+    builder.appendff("StrokePath");
 }
 
 void DrawEllipse::dump(StringBuilder& builder) const

Libraries/LibWeb/Painting/DisplayListCommand.h

@@ -246,7 +246,7 @@ struct FillPathUsingPaintStyle {
     void dump(StringBuilder&) const;
 };
 
-struct StrokePathUsingColor {
+struct StrokePath {
     Gfx::Path::CapStyle cap_style;
     Gfx::Path::JoinStyle join_style;
     float miter_limit;
@@ -254,7 +254,8 @@ struct StrokePathUsingColor {
     float dash_offset;
     Gfx::IntRect path_bounding_rect;
     Gfx::Path path;
-    Color color;
+    float opacity;
+    PaintStyleOrColor paint_style_or_color;
     float thickness;
     Gfx::FloatPoint aa_translation;
 
@@ -268,29 +269,6 @@ struct StrokePathUsingColor {
     void dump(StringBuilder&) const;
 };
 
-struct StrokePathUsingPaintStyle {
-    Gfx::Path::CapStyle cap_style;
-    Gfx::Path::JoinStyle join_style;
-    float miter_limit;
-    Vector<float> dash_array;
-    float dash_offset;
-    Gfx::IntRect path_bounding_rect;
-    Gfx::Path path;
-    PaintStyle paint_style;
-    float thickness;
-    float opacity = 1.0f;
-    Gfx::FloatPoint aa_translation;
-
-    [[nodiscard]] Gfx::IntRect bounding_rect() const { return path_bounding_rect; }
-
-    void translate_by(Gfx::IntPoint const& offset)
-    {
-        path_bounding_rect.translate_by(offset);
-        aa_translation.translate_by(offset.to_type<float>());
-    }
-    void dump(StringBuilder&) const;
-};
-
 struct DrawEllipse {
     Gfx::IntRect rect;
     Color color;
@@ -508,8 +486,7 @@ using DisplayListCommand = Variant<
     FillRectWithRoundedCorners,
     FillPathUsingColor,
     FillPathUsingPaintStyle,
-    StrokePathUsingColor,
-    StrokePathUsingPaintStyle,
+    StrokePath,
     DrawEllipse,
     FillEllipse,
     DrawLine,

Libraries/LibWeb/Painting/DisplayListPlayerSkia.cpp

@@ -660,30 +660,20 @@ void DisplayListPlayerSkia::fill_path_using_paint_style(FillPathUsingPaintStyle
     surface().canvas().drawPath(path, paint);
 }
 
-void DisplayListPlayerSkia::stroke_path_using_color(StrokePathUsingColor const& command)
+void DisplayListPlayerSkia::stroke_path(StrokePath const& command)
 {
-    auto& canvas = surface().canvas();
+    auto path = to_skia_path(command.path);
+    path.offset(command.aa_translation.x(), command.aa_translation.y());
     SkPaint paint;
-    paint.setAntiAlias(true);
-    paint.setStyle(SkPaint::kStroke_Style);
-    paint.setStrokeWidth(command.thickness);
-    paint.setStrokeCap(to_skia_cap(command.cap_style));
-    paint.setStrokeJoin(to_skia_join(command.join_style));
-    paint.setColor(to_skia_color(command.color));
-    paint.setStrokeMiter(command.miter_limit);
-    paint.setPathEffect(SkDashPathEffect::Make(command.dash_array.data(), command.dash_array.size(), command.dash_offset));
-    auto path = to_skia_path(command.path);
-    path.offset(command.aa_translation.x(), command.aa_translation.y());
-    canvas.drawPath(path, paint);
-}
-
-void DisplayListPlayerSkia::stroke_path_using_paint_style(StrokePathUsingPaintStyle const& command)
-{
-    auto path = to_skia_path(command.path);
-    path.offset(command.aa_translation.x(), command.aa_translation.y());
-    auto paint = paint_style_to_skia_paint(*command.paint_style, command.bounding_rect().to_type<float>());
-    paint.setAntiAlias(true);
+    if (command.paint_style_or_color.has<PaintStyle>()) {
+        auto const& paint_style = command.paint_style_or_color.get<PaintStyle>();
+        paint = paint_style_to_skia_paint(*paint_style, command.bounding_rect().to_type<float>());
         paint.setAlphaf(command.opacity);
+    } else {
+        auto const& color = command.paint_style_or_color.get<Color>();
+        paint.setColor(to_skia_color(color));
+    }
+    paint.setAntiAlias(true);
     paint.setStyle(SkPaint::Style::kStroke_Style);
     paint.setStrokeWidth(command.thickness);
     paint.setStrokeCap(to_skia_cap(command.cap_style));

Libraries/LibWeb/Painting/DisplayListPlayerSkia.h

@@ -42,8 +42,7 @@ private:
     void fill_rect_with_rounded_corners(FillRectWithRoundedCorners const&) override;
     void fill_path_using_color(FillPathUsingColor const&) override;
     void fill_path_using_paint_style(FillPathUsingPaintStyle const&) override;
-    void stroke_path_using_color(StrokePathUsingColor const&) override;
-    void stroke_path_using_paint_style(StrokePathUsingPaintStyle const&) override;
+    void stroke_path(StrokePath const&) override;
     void draw_ellipse(DrawEllipse const&) override;
     void fill_ellipse(FillEllipse const&) override;
     void draw_line(DrawLine const&) override;

Libraries/LibWeb/Painting/DisplayListRecorder.cpp

@@ -99,12 +99,12 @@ void DisplayListRecorder::fill_path(FillPathUsingPaintStyleParams params)
     });
 }
 
-void DisplayListRecorder::stroke_path(StrokePathUsingColorParams params)
+void DisplayListRecorder::stroke_path(StrokePathParams params)
 {
     // Skia treats zero thickness as a special case and will draw a hairline, while we want to draw nothing.
     if (!params.thickness)
         return;
-    if (params.color.alpha() == 0)
+    if (params.paint_style_or_color.has<Gfx::Color>() && params.paint_style_or_color.get<Gfx::Color>().alpha() == 0)
         return;
     auto aa_translation = params.translation.value_or(Gfx::FloatPoint {});
     auto path_bounding_rect = params.path.bounding_box().translated(aa_translation);
@@ -113,7 +113,7 @@ void DisplayListRecorder::stroke_path(StrokePathUsingColorParams params)
     auto path_bounding_int_rect = enclosing_int_rect(path_bounding_rect);
     if (path_bounding_int_rect.is_empty())
         return;
-    APPEND(StrokePathUsingColor {
+    APPEND(StrokePath {
         .cap_style = params.cap_style,
         .join_style = params.join_style,
         .miter_limit = params.miter_limit,
@@ -121,35 +121,9 @@ void DisplayListRecorder::stroke_path(StrokePathUsingColorParams params)
         .dash_offset = params.dash_offset,
         .path_bounding_rect = path_bounding_int_rect,
         .path = move(params.path),
-        .color = params.color,
-        .thickness = params.thickness,
-        .aa_translation = aa_translation,
-    });
-}
-
-void DisplayListRecorder::stroke_path(StrokePathUsingPaintStyleParams params)
-{
-    // Skia treats zero thickness as a special case and will draw a hairline, while we want to draw nothing.
-    if (!params.thickness)
-        return;
-    auto aa_translation = params.translation.value_or(Gfx::FloatPoint {});
-    auto path_bounding_rect = params.path.bounding_box().translated(aa_translation);
-    // Increase path bounding box by `thickness` to account for stroke.
-    path_bounding_rect.inflate(params.thickness, params.thickness);
-    auto path_bounding_int_rect = enclosing_int_rect(path_bounding_rect);
-    if (path_bounding_int_rect.is_empty())
-        return;
-    APPEND(StrokePathUsingPaintStyle {
-        .cap_style = params.cap_style,
-        .join_style = params.join_style,
-        .miter_limit = params.miter_limit,
-        .dash_array = move(params.dash_array),
-        .dash_offset = params.dash_offset,
-        .path_bounding_rect = path_bounding_int_rect,
-        .path = move(params.path),
-        .paint_style = params.paint_style,
-        .thickness = params.thickness,
         .opacity = params.opacity,
+        .paint_style_or_color = params.paint_style_or_color,
+        .thickness = params.thickness,
         .aa_translation = aa_translation,
     });
 }

Libraries/LibWeb/Painting/DisplayListRecorder.h

@@ -56,32 +56,19 @@ public:
     };
     void fill_path(FillPathUsingPaintStyleParams params);
 
-    struct StrokePathUsingColorParams {
+    struct StrokePathParams {
         Gfx::Path::CapStyle cap_style;
         Gfx::Path::JoinStyle join_style;
         float miter_limit;
         Vector<float> dash_array;
         float dash_offset;
         Gfx::Path path;
-        Gfx::Color color;
+        float opacity = 1.0f;
+        PaintStyleOrColor paint_style_or_color;
         float thickness;
         Optional<Gfx::FloatPoint> translation = {};
     };
-    void stroke_path(StrokePathUsingColorParams params);
-
-    struct StrokePathUsingPaintStyleParams {
-        Gfx::Path::CapStyle cap_style;
-        Gfx::Path::JoinStyle join_style;
-        float miter_limit;
-        Vector<float> dash_array;
-        float dash_offset;
-        Gfx::Path path;
-        PaintStyle paint_style;
-        float thickness;
-        float opacity;
-        Optional<Gfx::FloatPoint> translation = {};
-    };
-    void stroke_path(StrokePathUsingPaintStyleParams params);
+    void stroke_path(StrokePathParams);
 
     void draw_ellipse(Gfx::IntRect const& a_rect, Color color, int thickness);
 

Libraries/LibWeb/Painting/MediaPaintable.cpp

@@ -15,6 +15,7 @@
 #include <LibWeb/Page/Page.h>
 #include <LibWeb/Painting/DisplayListRecorder.h>
 #include <LibWeb/Painting/MediaPaintable.h>
+#include <LibWeb/Painting/PaintStyle.h>
 #include <LibWeb/UIEvents/MouseButton.h>
 
 namespace Web::Painting {
@@ -242,7 +243,7 @@ void MediaPaintable::paint_control_bar_speaker(DisplayListRecordingContext& cont
         .dash_array = {},
         .dash_offset = 0,
         .path = path,
-        .color = speaker_button_color,
+        .paint_style_or_color = speaker_button_color,
         .thickness = 1,
     });
 

Libraries/LibWeb/Painting/PaintableBox.cpp

@@ -904,7 +904,7 @@ void paint_text_decoration(DisplayListRecordingContext& context, TextPaintable c
                 .dash_array = {},
                 .dash_offset = 0,
                 .path = build_triangle_wave_path(line_start_point.to_type<int>(), line_end_point.to_type<int>(), amplitude),
-                .color = line_color,
+                .paint_style_or_color = line_color,
                 .thickness = static_cast<float>(device_line_thickness.value()),
             });
             break;

Libraries/LibWeb/Painting/SVGPathPaintable.cpp

@@ -176,9 +176,9 @@ void SVGPathPaintable::paint(DisplayListRecordingContext& context, PaintPhase ph
             .dash_array = stroke_dasharray,
             .dash_offset = stroke_dashoffset,
             .path = path,
-            .paint_style = *paint_style,
-            .thickness = stroke_thickness,
             .opacity = stroke_opacity,
+            .paint_style_or_color = *paint_style,
+            .thickness = stroke_thickness,
             .translation = offset,
         });
     } else if (auto stroke_color = graphics_element.stroke_color(); stroke_color.has_value()) {
@@ -189,7 +189,7 @@ void SVGPathPaintable::paint(DisplayListRecordingContext& context, PaintPhase ph
             .dash_array = stroke_dasharray,
             .dash_offset = stroke_dashoffset,
             .path = path,
-            .color = stroke_color->with_opacity(stroke_opacity),
+            .paint_style_or_color = stroke_color->with_opacity(stroke_opacity),
             .thickness = stroke_thickness,
             .translation = offset,
         });