/*
 * 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 https://mozilla.org/MPL/2.0/.
 */

#pragma once

#include <string>
#include <optional>
#include <map>
#include "Scene/AtlasMetadata.hpp"
#include "Scene/Texture.hpp"
#include "msdfgen.h"
#include "msdfgen-ext.h"
#include "msdf-atlas-gen/msdf-atlas-gen.h"

namespace OpenVulkano::Scene
{
	using namespace msdfgen;
	using namespace msdf_atlas;
	using namespace OpenVulkano::Scene;

	class FontAtlasGenerator
	{
	public:
		void GenerateAtlas(const std::string& fontFile, const Charset& charset = Charset::ASCII,
		                   const std::optional<std::string>& pngOutput = std::nullopt);
		void GenerateAtlas(const msdfgen::byte* fontData, int length, const Charset& charset = Charset::ASCII,
		                   const std::optional<std::string>& pngOutput = std::nullopt);
		void SaveAtlasMetadataInfo(const std::string& outputFile) const;
		const Texture& GetAtlas() const { return m_atlasTex; }
		std::map<uint32_t, GlyphInfo>& GetAtlasInfo() { return m_symbols; }
	private:
		void Generate(FreetypeHandle* ft, FontHandle* font, const Charset& chset,
		              const std::optional<std::string>& pngOutput);
	private:
		ImmediateAtlasGenerator<float, 1, sdfGenerator, BitmapAtlasStorage<msdfgen::byte, 1>> m_generator;
		Texture m_atlasTex;
		std::map<uint32_t, GlyphInfo> m_symbols;
	};
}