Bug 283127 – REGRESSION(265569@main): Fix division by zero in calculating the boundingRect of a QuadraticCurve

• Status: RESOLVED
• Resolution: FIXED
• Component: SVG

[Said Abou-Hallawa]

This function calculates the vertex of a QuadraticCurve. p0, p1 and p2 represent the currentPoint, controlPoint and endPoint respectively.

float calculateQuadraticExtremity(float p0, float p1, float p2)
{
    float t = (p0 - p1) / (p0 - 2 * p1 + p2);
    return calculateQuadratic(t, p0, p1, p2);
}

If the QuadraticCurve is symmetric, the control point is be the mid-point between the currentPoint and the endPoint. In this case (p0 - 2 * p1 + p2) is equal to zero.

[Radar WebKit Bug Importer]

<rdar://problem/139904014>

[Said Abou-Hallawa]

Pull request: https://github.com/WebKit/WebKit/pull/36653

[EWS]

Committed 286618@main (dae159bae231): <https://commits.webkit.org/286618@main>

Reviewed commits have been landed. Closing PR #36653 and removing active labels.