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LibWeb: Implement missing CanvasPath::bezierCurveTo() steps

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MacDue 2024-03-20 21:32:51 +00:00 committed by Andreas Kling
parent 877a0e06c4
commit cf1f00943a
Notes: sideshowbarker 2024-07-16 22:16:50 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/cf1f00943a
Pull-request: https://github.com/SerenityOS/serenity/pull/23660
1 changed files with 10 additions and 0 deletions
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10
Userland/Libraries/LibWeb/HTML/Canvas/CanvasPath.cpp
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@ -72,8 +72,18 @@ void CanvasPath::quadratic_curve_to(float cpx, float cpy, float x, float y)
m_path.quadratic_bezier_curve_to(transform.map(Gfx::FloatPoint { cpx, cpy }), transform.map(Gfx::FloatPoint { x, y }));
}
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-beziercurveto
void CanvasPath::bezier_curve_to(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y)
{
// 1. If any of the arguments are infinite or NaN, then return.
if (!isfinite(cp1x) || !isfinite(cp1y) || !isfinite(cp2x) || !isfinite(cp2y) || !isfinite(x) || !isfinite(y))
return;
// 2. Ensure there is a subpath for (cp1x, cp1y)
ensure_subpath(cp1x, cp1y);
// 3. Connect the last point in the subpath to the given point (x, y) using a cubic Bézier curve with control poits (cp1x, cp1y) and (cp2x, cp2y).
// 4. Add the point (x, y) to the subpath.
auto transform = active_transform();
m_path.cubic_bezier_curve_to(
transform.map(Gfx::FloatPoint { cp1x, cp1y }), transform.map(Gfx::FloatPoint { cp2x, cp2y }), transform.map(Gfx::FloatPoint { x, y }));