TexturePacker.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include <glm/glm.hpp>
#include "AUI/Common/AVector.h"
#include "AUI/Common/SharedPtr.h"
 
namespace Util {
   typedef int dim;
   class Rect {
   public:
       dim x, y, width, height;
       Rect(dim x, dim y, dim width, dim height);
       Rect() = default;
       bool hasPoint(dim x, dim y) const;
       bool collidesWith(const Rect& rect);
   };
   class TexturePacker_Lol {
   protected:
       dim side;
       AVector<Rect> mRects;
       bool noCollision(const Rect& r);
       bool check(Rect& res, Rect r);
       bool allocateRect(Rect& r, dim width, dim height);
   };
 
   template<class T>
   class TexturePacker : public TexturePacker_Lol {
   protected:
       glm::vec4 insert(T& data, dim width, dim height)
       {
           if (side == 0)
               resize(data, 64);
           Rect r(0, 0, 0, 0);
           while (!allocateRect(r, width, height))
           {
               resize(data, side * 2);
           }
           this->onInsert(data, r.x, r.y);
           return { float(r.x), float(r.y), float(r.x + r.width), float(r.y + r.height) };
       }
 
       virtual void onResize(T& data, dim side) = 0;
       virtual void onInsert(T& data, const dim& x, const dim& y) = 0;
 
   public:
       TexturePacker()
       {
           side = 0;
       }
       virtual ~TexturePacker() {
 
       }
 
       virtual glm::vec4 insert(T& data) = 0;
 
       void resize(T& data, dim size)
       {
           side = size;
           this->onResize(data, size);
       }
   };
}
 

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