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LibWeb: Add DOMMatrix flipX and flipY

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Bastiaan van der Plaat 2023-09-04 18:23:32 +02:00 • committed by Jelle Raaijmakers
parent fc380bf516
commit f1742ae1b9
5 changed files with 50 additions and 2 deletions
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38
Userland/Libraries/LibWeb/Geometry/DOMMatrixReadOnly.cpp
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@ -284,6 +284,44 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMMatrix>> DOMMatrixReadOnly::multiply(DOM
return result->multiply_self(other);
}
// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipx
JS::NonnullGCPtr<DOMMatrix> DOMMatrixReadOnly::flip_x()
{
// 1. Let result be the resulting matrix initialized to the values of the current matrix.
auto result = DOMMatrix::create_from_dom_matrix_read_only(realm(), *this);
// 2. Post-multiply result with new DOMMatrix([-1, 0, 0, 1, 0, 0]).
// clang-format off
Gfx::DoubleMatrix4x4 flip_matrix = { -1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
// clang-format on
result->m_matrix = result->m_matrix * flip_matrix;
// 3. Return result.
return result;
}
// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipy
JS::NonnullGCPtr<DOMMatrix> DOMMatrixReadOnly::flip_y()
{
// 1. Let result be the resulting matrix initialized to the values of the current matrix.
auto result = DOMMatrix::create_from_dom_matrix_read_only(realm(), *this);
// 2. Post-multiply result with new DOMMatrix([1, 0, 0, -1, 0, 0]).
// clang-format off
Gfx::DoubleMatrix4x4 flip_matrix = { 1, 0, 0, 0,
0, -1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
// clang-format on
result->m_matrix = result->m_matrix * flip_matrix;
// 3. Return result.
return result;
}
// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-inverse
JS::NonnullGCPtr<DOMMatrix> DOMMatrixReadOnly::inverse() const
{