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LibGfx: Add AffineTransform::map_to_quad(Rect)
Unlike map(Rect) which returns a Rect, mapping a Rect to a Quad allows us to represent the actual result of mapping all four corners of the Rect through the matrix.
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2 changed files with 15 additions and 2 deletions
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@ -1,11 +1,12 @@
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Optional.h>
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#include <LibGfx/AffineTransform.h>
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#include <LibGfx/Quad.h>
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#include <LibGfx/Rect.h>
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namespace Gfx {
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@ -211,4 +212,14 @@ IntRect AffineTransform::map(IntRect const& rect) const
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return enclosing_int_rect(map(FloatRect(rect)));
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}
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Quad<float> AffineTransform::map_to_quad(Rect<float> const& rect) const
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{
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return {
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map(rect.top_left()),
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map(rect.top_right()),
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map(rect.bottom_right()),
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map(rect.bottom_left()),
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};
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}
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}
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