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LibWeb: Add DOMMatrix skewX and skewY

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Bastiaan van der Plaat
2023-09-04 18:22:55 +02:00
committed by Jelle Raaijmakers
parent b21ca0d04e
commit fc380bf516
8 changed files with 82 additions and 4 deletions
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33
Userland/Libraries/LibWeb/Geometry/DOMMatrix.cpp
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@@ -1,5 +1,6 @@
/*
* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
* Copyright (c) 2023, Bastiaan van der Plaat <bastiaan.v.d.plaat@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@@ -307,6 +308,38 @@ JS::NonnullGCPtr<DOMMatrix> DOMMatrix::translate_self(Optional<double> tx, Optio
return *this;
}
// https://drafts.fxtf.org/geometry/#dom-dommatrix-skewxself
JS::NonnullGCPtr<DOMMatrix> DOMMatrix::skew_x_self(double sx)
{
// 1. Post-multiply a skewX transformation on the current matrix by the specified angle sx in degrees. The 2D skewX matrix is described in CSS Transforms with alpha = sx in degrees. [CSS3-TRANSFORMS]
// clang-format off
Gfx::DoubleMatrix4x4 skew_matrix = { 1, tan(sx * M_PI / 180.0), 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
// clang-format on
m_matrix = m_matrix * skew_matrix;
// 3. Return the current matrix.
return *this;
}
// https://drafts.fxtf.org/geometry/#dom-dommatrix-skewyself
JS::NonnullGCPtr<DOMMatrix> DOMMatrix::skew_y_self(double sy)
{
// 1. Post-multiply a skewX transformation on the current matrix by the specified angle sy in degrees. The 2D skewY matrix is described in CSS Transforms with beta = sy in degrees. [CSS3-TRANSFORMS]
// clang-format off
Gfx::DoubleMatrix4x4 skew_matrix = { 1, 0, 0, 0,
tan(sy * M_PI / 180.0), 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1 };
// clang-format on
m_matrix = m_matrix * skew_matrix;
// 3. Return the current matrix.
return *this;
}
// https://drafts.fxtf.org/geometry/#dom-dommatrix-invertself
JS::NonnullGCPtr<DOMMatrix> DOMMatrix::invert_self()
{