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https://github.com/RGBCube/serenity
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LibWeb: Apply scroll boxes offsets after painting commands recording
With this change, instead of applying scroll offsets during the recording of the painting command list, we do the following: 1. Collect all boxes with scrollable overflow into a PaintContext, each with an id and the total amount of scrolling offset accumulated from ancestor scrollable boxes. 2. During the recording phase assign a corresponding scroll_frame_id to each command that paints content within a scrollable box. 3. Before executing the recorded commands, translate each command that has a scroll_frame_id by the accumulated scroll offset. This approach has following advantages: - Implementing nested scrollables becomes much simpler, as the recording phase only requires the correct assignment of the nearest scrollable's scroll_frame_id, while the accumulated offset from ancestors is applied subsequently. - The recording of painting commands is not tied to a specific offset within scrollable boxes, which means in the future, it will be possible to update the scrolling offset and repaint without the need to re-record painting commands.
This commit is contained in:
Aliaksandr Kalenik
Andreas Kling
parent
d3025668a4
commit
ac6b3c989d
12 changed files with 307 additions and 24 deletions
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@ -47,6 +47,8 @@ struct DrawGlyphRun {
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Gfx::IntRect rect;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset);
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};
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struct DrawText {
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@ -59,6 +61,7 @@ struct DrawText {
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Optional<NonnullRefPtr<Gfx::Font>> font {};
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct FillRect {
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@ -66,6 +69,7 @@ struct FillRect {
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Color color;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct DrawScaledBitmap {
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@ -75,6 +79,7 @@ struct DrawScaledBitmap {
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Gfx::Painter::ScalingMode scaling_mode;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return dst_rect; }
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void translate_by(Gfx::IntPoint const& offset) { dst_rect.translate_by(offset); }
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};
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struct DrawScaledImmutableBitmap {
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@ -84,6 +89,7 @@ struct DrawScaledImmutableBitmap {
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Gfx::Painter::ScalingMode scaling_mode;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return dst_rect; }
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void translate_by(Gfx::IntPoint const& offset) { dst_rect.translate_by(offset); }
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};
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struct SetClipRect {
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@ -116,6 +122,11 @@ struct PushStackingContext {
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CSS::ImageRendering image_rendering;
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StackingContextTransform transform;
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Optional<StackingContextMask> mask = {};
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void translate_by(Gfx::IntPoint const& offset)
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{
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post_transform_translation.translate_by(offset);
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}
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};
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struct PopStackingContext { };
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@ -125,16 +136,24 @@ struct PaintLinearGradient {
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LinearGradientData linear_gradient_data;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return gradient_rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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gradient_rect.translate_by(offset);
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}
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};
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struct PaintOuterBoxShadow {
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PaintOuterBoxShadowParams outer_box_shadow_params;
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[[nodiscard]] Gfx::IntRect bounding_rect() const;
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void translate_by(Gfx::IntPoint const& offset);
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};
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struct PaintInnerBoxShadow {
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PaintOuterBoxShadowParams outer_box_shadow_params;
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void translate_by(Gfx::IntPoint const& offset);
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};
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struct PaintTextShadow {
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@ -147,6 +166,7 @@ struct PaintTextShadow {
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Gfx::IntPoint draw_location;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return { draw_location, shadow_bounding_rect.size() }; }
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void translate_by(Gfx::IntPoint const& offset) { draw_location.translate_by(offset); }
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};
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struct FillRectWithRoundedCorners {
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@ -158,6 +178,7 @@ struct FillRectWithRoundedCorners {
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Gfx::AntiAliasingPainter::CornerRadius bottom_right_radius;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct FillPathUsingColor {
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@ -168,6 +189,12 @@ struct FillPathUsingColor {
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Gfx::FloatPoint aa_translation;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return path_bounding_rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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path_bounding_rect.translate_by(offset);
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aa_translation.translate_by(offset.to_type<float>());
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}
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};
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struct FillPathUsingPaintStyle {
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@ -179,6 +206,12 @@ struct FillPathUsingPaintStyle {
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Gfx::FloatPoint aa_translation;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return path_bounding_rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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path_bounding_rect.translate_by(offset);
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aa_translation.translate_by(offset.to_type<float>());
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}
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};
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struct StrokePathUsingColor {
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@ -189,6 +222,12 @@ struct StrokePathUsingColor {
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Gfx::FloatPoint aa_translation;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return path_bounding_rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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path_bounding_rect.translate_by(offset);
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aa_translation.translate_by(offset.to_type<float>());
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}
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};
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struct StrokePathUsingPaintStyle {
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@ -200,6 +239,12 @@ struct StrokePathUsingPaintStyle {
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Gfx::FloatPoint aa_translation;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return path_bounding_rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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path_bounding_rect.translate_by(offset);
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aa_translation.translate_by(offset.to_type<float>());
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}
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};
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struct DrawEllipse {
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@ -208,6 +253,11 @@ struct DrawEllipse {
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int thickness;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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rect.translate_by(offset);
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}
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};
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struct FillEllipse {
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@ -216,6 +266,11 @@ struct FillEllipse {
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Gfx::AntiAliasingPainter::BlendMode blend_mode;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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rect.translate_by(offset);
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}
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};
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struct DrawLine {
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@ -225,6 +280,12 @@ struct DrawLine {
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int thickness;
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Gfx::Painter::LineStyle style;
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Color alternate_color;
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void translate_by(Gfx::IntPoint const& offset)
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{
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from.translate_by(offset);
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to.translate_by(offset);
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}
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};
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struct DrawSignedDistanceField {
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@ -234,6 +295,11 @@ struct DrawSignedDistanceField {
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float smoothing;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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rect.translate_by(offset);
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}
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};
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struct PaintFrame {
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@ -242,6 +308,8 @@ struct PaintFrame {
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Gfx::FrameStyle style;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct ApplyBackdropFilter {
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@ -250,6 +318,11 @@ struct ApplyBackdropFilter {
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CSS::ResolvedBackdropFilter backdrop_filter;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return backdrop_region; }
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void translate_by(Gfx::IntPoint const& offset)
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{
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backdrop_region.translate_by(offset);
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}
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};
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struct DrawRect {
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@ -258,6 +331,8 @@ struct DrawRect {
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bool rough;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct PaintRadialGradient {
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@ -267,6 +342,8 @@ struct PaintRadialGradient {
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Gfx::IntSize size;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct PaintConicGradient {
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@ -275,6 +352,8 @@ struct PaintConicGradient {
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Gfx::IntPoint position;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return rect; }
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void translate_by(Gfx::IntPoint const& offset) { rect.translate_by(offset); }
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};
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struct DrawTriangleWave {
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@ -283,6 +362,12 @@ struct DrawTriangleWave {
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Color color;
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int amplitude;
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int thickness;
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void translate_by(Gfx::IntPoint const& offset)
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{
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p1.translate_by(offset);
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p2.translate_by(offset);
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}
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};
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struct SampleUnderCorners {
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@ -292,6 +377,11 @@ struct SampleUnderCorners {
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CornerClip corner_clip;
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[[nodiscard]] Gfx::IntRect bounding_rect() const;
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void translate_by(Gfx::IntPoint const& offset)
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{
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border_rect.translate_by(offset);
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}
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};
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struct BlitCornerClipping {
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@ -299,6 +389,11 @@ struct BlitCornerClipping {
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Gfx::IntRect border_rect;
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[[nodiscard]] Gfx::IntRect bounding_rect() const;
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void translate_by(Gfx::IntPoint const& offset)
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{
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border_rect.translate_by(offset);
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}
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};
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struct PaintBorders {
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@ -307,6 +402,11 @@ struct PaintBorders {
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BordersDataDevicePixels borders_data;
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[[nodiscard]] Gfx::IntRect bounding_rect() const { return border_rect.to_type<int>(); }
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void translate_by(Gfx::IntPoint const& offset)
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{
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border_rect.translate_by(offset.to_type<DevicePixels>());
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}
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};
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using PaintingCommand = Variant<
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@ -457,6 +557,11 @@ public:
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void set_font(Gfx::Font const& font);
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void set_scroll_frame_id(i32 id)
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{
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state().scroll_frame_id = id;
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}
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void save();
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void restore();
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@ -497,20 +602,28 @@ public:
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m_state_stack.append(State());
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}
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void apply_scroll_offsets(Vector<Gfx::IntPoint> const& offsets_by_frame_id);
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private:
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struct State {
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Gfx::AffineTransform translation;
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Optional<Gfx::IntRect> clip_rect;
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Optional<i32> scroll_frame_id;
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};
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State& state() { return m_state_stack.last(); }
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State const& state() const { return m_state_stack.last(); }
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void push_command(PaintingCommand command)
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{
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m_painting_commands.append(command);
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m_painting_commands.append({ state().scroll_frame_id, command });
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}
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Vector<PaintingCommand> m_painting_commands;
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struct PaintingCommandWithScrollFrame {
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Optional<i32> scroll_frame_id;
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PaintingCommand command;
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};
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Vector<PaintingCommandWithScrollFrame> m_painting_commands;
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Vector<State> m_state_stack;
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};
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