//
// Lol Engine
//
// Copyright: (c) 2010-2013 Sam Hocevar <sam@hocevar.net>
//                     2013 Jean-Yves Lamoureux <jylam@lnxscene.org>
//   This program is free software; you can redistribute it and/or
//   modify it under the terms of the Do What The Fuck You Want To
//   Public License, Version 2, as published by Sam Hocevar. See
//   http://www.wtfpl.net/ for more details.
//

#include <lol/engine-internal.h>

#include <cstring>
#include <cstdio>

namespace lol
{

/*
 * Font implementation class
 */

class FontData
{
    friend class Font;

private:
    String m_name;
    TileSet *tileset;
    ivec2 size;
};

/*
 * Public Font class
 */

Font::Font(char const *path)
  : data(new FontData())
{
    data->m_name = String("<font> ") + path;

    data->tileset = Tiler::Register(path, ivec2::zero, ivec2(16));
    data->size = data->tileset->GetTileSize(0);

    m_drawgroup = DRAWGROUP_TEXTURE;
}

Font::~Font()
{
    Tiler::Deregister(data->tileset);
    delete data;
}

void Font::TickDraw(float seconds, Scene &scene)
{
    Entity::TickDraw(seconds, scene);

    if (data->tileset->GetTexture())
    {
        data->tileset->GetTexture()->SetMinFiltering(TextureMinFilter::LINEAR_TEXEL_NO_MIPMAP);
        data->tileset->GetTexture()->SetMagFiltering(TextureMagFilter::LINEAR_TEXEL);
    }
}

char const *Font::GetName()
{
    return data->m_name.C();
}

void Font::Print(Scene &scene, vec3 pos, char const *str, vec2 scale, float spacing)
{
    float origin_x = pos.x;
    while (*str)
    {
        uint32_t ch = (uint8_t)*str++;

        switch (ch)
        {
        case '\r': /* carriage return */
            pos.x = origin_x;
            break;
        case '\b': /* backspace */
            pos.x -= data->size.x * scale.x;
            break;
        case '\n': /* new line */
            pos.x = origin_x;
            pos.y -= data->size.y * scale.y;
            break;
        default:
            if (ch != ' ')
                scene.AddTile(data->tileset, ch & 255, pos, 0, scale, 0.0f);
            pos.x += data->size.x * scale.x;
            break;
        }

        pos.x += data->size.x * scale.x * spacing;
    }
}

ivec2 Font::GetSize() const
{
    return data->size;
}

} /* namespace lol */