BLT-With-Graphics-Template/include/blt/gfx/renderer/font_renderer.h

#pragma once
/*
 *  Copyright (C) 2024  Brett Terpstra
 *
 *  This program 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.
 *
 *  This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef BLT_WITH_GRAPHICS_FONT_RENDERER_H
#define BLT_WITH_GRAPHICS_FONT_RENDERER_H

#include <blt/gfx/font/font.h>
#include <blt/gfx/texture.h>
#include <blt/std/hashmap.h>
#include <blt/std/binary_tree.h>

namespace blt::gfx
{
    
    class font_texture_atlas : public texture_gl2D
    {
        public:
            struct bounded_t
            {
                font::glyph_t glyph;
                blt::vec2ui min;
                blt::vec2ui max;
            };
            
            explicit font_texture_atlas(blt::i32 dimensions);
            
            blt::u64 add_font(const font::font_file_t& file);
            
            blt::u64 add_font(const font::font_file_t& file, blt::u64 start);
            
            bounded_t& get_glyph(blt::u64 c)
            { return glyphs.at(c); }
            
            [[nodiscard]] const bounded_t& get_glyph(blt::u64 c) const
            { return glyphs.at(c); }
        
        private:
            blt::hashmap_t<blt::u64, bounded_t> glyphs;
            blt::u32 used_width = 0;
            blt::u32 used_height = 0;
    };
    
    class font_renderer_t
    {
        public:
            explicit font_renderer_t(const std::vector<font::font_file_t>& files, blt::i32 dimensions = 4096);
        
        private:
    };
    
}

#endif //BLT_WITH_GRAPHICS_FONT_RENDERER_H