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LibWeb: Implement CanvasPattern.setTransform()

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This method applies the given transformation matrix to a pattern.
This commit is contained in:
Tim Ledbetter 2025-10-26 19:06:13 +00:00 • committed by Jelle Raaijmakers
parent 9312a9f86f
commit e1ff1e2095
Notes: github-actions[bot] 2025-10-27 23:42:03 +00:00
10 changed files with 87 additions and 7 deletions
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17
Libraries/LibWeb/HTML/CanvasPattern.cpp
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@ -75,4 +75,21 @@ void CanvasPattern::initialize(JS::Realm& realm)
Base::initialize(realm);
}
// https://html.spec.whatwg.org/multipage/canvas.html#dom-canvaspattern-settransform
WebIDL::ExceptionOr<void> CanvasPattern::set_transform(Geometry::DOMMatrix2DInit& transform)
{
// 1. Let matrix be the result of creating a DOMMatrix from the 2D dictionary transform.
auto matrix = TRY(Geometry::DOMMatrix::create_from_dom_matrix_2d_init(realm(), transform));
// 2. If one or more of matrix's m11 element, m12 element, m21 element, m22 element, m41 element, or m42 element are infinite or NaN, then return.
if (!isfinite(matrix->m11()) || !isfinite(matrix->m12()) || !isfinite(matrix->m21()) || !isfinite(matrix->m22()) || !isfinite(matrix->m41()) || !isfinite(matrix->m42()))
return {};
// 3. Reset the pattern's transformation matrix to matrix.
Gfx::AffineTransform affine_transform(matrix->a(), matrix->b(), matrix->c(), matrix->d(), matrix->e(), matrix->f());
m_pattern->set_transform(affine_transform);
return {};
}
}