/*
 Copyright (C) 2010-2017 Kristian Duske
 
 This file is part of TrenchBroom.
 
 TrenchBroom is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 TrenchBroom is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with TrenchBroom. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TrenchBroom_FontTexture
#define TrenchBroom_FontTexture

#include "FreeType.h"

#include "Renderer/GL.h"

#include <memory>

namespace TrenchBroom {
    namespace Renderer {
        class FontGlyphBuilder;
        
        class FontTexture {
        public:
            using Ptr = std::unique_ptr<FontTexture>;
        private:
            size_t m_size;
            char* m_buffer;
            GLuint m_textureId;
            
            friend class FontGlyphBuilder;
        public:
            FontTexture();
            FontTexture(size_t cellCount, size_t cellSize, size_t margin);
            FontTexture(const FontTexture& other);
            FontTexture& operator=(FontTexture other);
            ~FontTexture();

            size_t size() const;
            
            void activate();
            void deactivate();
        private:
            size_t computeTextureSize(size_t cellCount, size_t cellSize, size_t margin) const;
        };
    }
}

#endif /* defined(TrenchBroom_FontTexture) */
