LibGfx: Clip edges above or below the visible area in the rasterizer

This avoids doing pointless plotting for scanlines that will never be seen. Note: This currently can only clip edges vertically. Horizontal clipping is more tricky, since edges that are not visible can still change how things accumulate across the scanline. Fixes #22382 Sadly, this causes a bunch of LibWeb test churn as this change imperceptibly changes the final rasterized output.
2025-07-27 16:47:44 +00:00 · 2023-12-23 23:58:38 +00:00 · 2023-12-23 23:58:38 +00:00 · 64411127cb
commit 64411127cb
parent fe04d83ef5
18 changed files with 58 additions and 38 deletions
--- a/Tests/LibWeb/Ref/reference/images/border-radius-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/border-radius-ref.png
--- a/Tests/LibWeb/Ref/reference/images/canvas-fillstyle-rgb.png
+++ b/Tests/LibWeb/Ref/reference/images/canvas-fillstyle-rgb.png
--- a/Tests/LibWeb/Ref/reference/images/canvas-path-rect-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/canvas-path-rect-ref.png
--- a/Tests/LibWeb/Ref/reference/images/css-background-position-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/css-background-position-ref.png
--- a/Tests/LibWeb/Ref/reference/images/css-background-repeat-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/css-background-repeat-ref.png
--- a/Tests/LibWeb/Ref/reference/images/css-backgrounds-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/css-backgrounds-ref.png
--- a/Tests/LibWeb/Ref/reference/images/css-gradients-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/css-gradients-ref.png
--- a/Tests/LibWeb/Ref/reference/images/inline-node-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/inline-node-ref.png
--- a/Tests/LibWeb/Ref/reference/images/input-placeholder-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/input-placeholder-ref.png
--- a/Tests/LibWeb/Ref/reference/images/meter-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/meter-ref.png
--- a/Tests/LibWeb/Ref/reference/images/object-fit-position.png
+++ b/Tests/LibWeb/Ref/reference/images/object-fit-position.png
--- a/Tests/LibWeb/Ref/reference/images/outer-box-shadow-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/outer-box-shadow-ref.png
--- a/Tests/LibWeb/Ref/reference/images/svg-gradient-spreadMethod-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/svg-gradient-spreadMethod-ref.png
--- a/Tests/LibWeb/Ref/reference/images/svg-radialGradient-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/svg-radialGradient-ref.png
--- a/Tests/LibWeb/Ref/reference/images/svg-textPath-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/svg-textPath-ref.png
--- a/Tests/LibWeb/Ref/reference/images/text-shadow-ref.png
+++ b/Tests/LibWeb/Ref/reference/images/text-shadow-ref.png