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a5442ad70d
Using `draw_scaled_bitmap()` for simple scales is almost always better than using `draw_scaled_bitmap_with_transform()` which does not respect the scaling mode.
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
/*
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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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#pragma once
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#include <AK/Concepts.h>
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#include <AK/Format.h>
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#include <AK/Forward.h>
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#include <LibGfx/Forward.h>
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namespace Gfx {
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class AffineTransform {
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public:
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AffineTransform()
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: m_values { 1, 0, 0, 1, 0, 0 }
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{
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}
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AffineTransform(float a, float b, float c, float d, float e, float f)
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: m_values { a, b, c, d, e, f }
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{
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}
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[[nodiscard]] bool is_identity() const
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{
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return m_values[0] == 1 && m_values[1] == 0 && m_values[2] == 0 && m_values[3] == 1 && m_values[4] == 0 && m_values[5] == 0;
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}
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[[nodiscard]] bool is_identity_or_translation() const
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{
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return m_values[0] == 1 && m_values[1] == 0 && m_values[2] == 0 && m_values[3] == 1;
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}
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[[nodiscard]] bool is_identity_or_translation_or_scale() const
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{
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return m_values[1] == 0 && m_values[2] == 0;
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}
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void map(float unmapped_x, float unmapped_y, float& mapped_x, float& mapped_y) const;
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template<Arithmetic T>
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Point<T> map(Point<T>) const;
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template<Arithmetic T>
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Size<T> map(Size<T>) const;
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template<Arithmetic T>
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Rect<T> map(Rect<T> const&) const;
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Quad<float> map_to_quad(Rect<float> const&) const;
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[[nodiscard]] ALWAYS_INLINE float a() const { return m_values[0]; }
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[[nodiscard]] ALWAYS_INLINE float b() const { return m_values[1]; }
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[[nodiscard]] ALWAYS_INLINE float c() const { return m_values[2]; }
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[[nodiscard]] ALWAYS_INLINE float d() const { return m_values[3]; }
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[[nodiscard]] ALWAYS_INLINE float e() const { return m_values[4]; }
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[[nodiscard]] ALWAYS_INLINE float f() const { return m_values[5]; }
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[[nodiscard]] float x_scale() const;
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[[nodiscard]] float y_scale() const;
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[[nodiscard]] FloatPoint scale() const;
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[[nodiscard]] float x_translation() const;
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[[nodiscard]] float y_translation() const;
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[[nodiscard]] FloatPoint translation() const;
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[[nodiscard]] float rotation() const;
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AffineTransform& scale(float sx, float sy);
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AffineTransform& scale(FloatPoint s);
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AffineTransform& set_scale(float sx, float sy);
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AffineTransform& set_scale(FloatPoint s);
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AffineTransform& translate(float tx, float ty);
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AffineTransform& translate(FloatPoint t);
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AffineTransform& set_translation(float tx, float ty);
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AffineTransform& set_translation(FloatPoint t);
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AffineTransform& rotate_radians(float);
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AffineTransform& skew_radians(float x_radians, float y_radians);
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AffineTransform& multiply(AffineTransform const&);
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float determinant() const;
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Optional<AffineTransform> inverse() const;
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private:
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float m_values[6] { 0 };
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};
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}
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template<>
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struct AK::Formatter<Gfx::AffineTransform> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Gfx::AffineTransform const& value)
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{
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return Formatter<FormatString>::format(builder, "[{} {} {} {} {} {}]"sv, value.a(), value.b(), value.c(), value.d(), value.e(), value.f());
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}
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};
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