Transform.hpp

//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2025 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
#ifndef TGUI_TRANSFORM_HPP
#define TGUI_TRANSFORM_HPP

 
#include <TGUI/Config.hpp>
#include <TGUI/Rect.hpp>
 
#if !TGUI_EXPERIMENTAL_USE_STD_MODULE
    #include <array>
#endif

 
TGUI_MODULE_EXPORT namespace tgui
{
    // Based on sf::Transform from SFML
    class TGUI_API Transform
    {
    public:

        Transform();

        Transform(float a00, float a01, float a02,
                  float a10, float a11, float a12,
                  float a20, float a21, float a22);

        Transform(const std::array<float, 16>& matrix);

        TGUI_NODISCARD const std::array<float, 16>& getMatrix() const;

        TGUI_NODISCARD Transform getInverse() const;

        TGUI_NODISCARD Vector2f transformPoint(const Vector2f& point) const
        {
            return {m_matrix[0] * point.x + m_matrix[4] * point.y + m_matrix[12],
                    m_matrix[1] * point.x + m_matrix[5] * point.y + m_matrix[13]};
        }

        TGUI_NODISCARD FloatRect transformRect(const FloatRect& rectangle) const;

        Transform& combine(const Transform& other);

        Transform& translate(const Vector2f& offset);

        Transform& rotate(float angle, const Vector2f& center = {0, 0});

        Transform& scale(const Vector2f& factors, const Vector2f& center = {0, 0});

        TGUI_NODISCARD Transform operator *(const Transform& right) const;
        Transform& operator *=(const Transform& right);
        TGUI_NODISCARD Vector2f operator *(const Vector2f& right) const;

        TGUI_DEPRECATED("Use roundPosition(Vector2f) instead") void roundPosition(float pixelScaleX, float pixelScaleY);

        void roundPosition(Vector2f pixelScale);

    private:
 
        std::array<float, 16> m_matrix; 
    };
}

 
#endif // TGUI_TRANSFORM_HPP