/*
 * 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 "Math/Math.hpp"
#include "Image/Image.hpp"
#include "Scene/Texture.hpp"
#include <string_view>
#include <map>

namespace OpenVulkano::Scene
{
	struct GlyphInfo
	{
		//GlyphGeometry geometry;
		//GlyphBox glyphBox;
		Math::Vector3f_SIMD xyz[4] = {};
		Math::Vector2f_SIMD uv[4] = {};
		double advance = 0;
	};

	class FontAtlasType
	{
	public:
		enum Type : int16_t
		{
			SDF = 0,
			MSDF,
			UNKNOWN
		};
		static constexpr std::string_view DEFAULT_FG_SHADERS[] = { "Shader/text", "Shader/msdfText" };

	public:
		FontAtlasType(Type type) : m_type(type) {}
		Type GetType() const { return m_type; }
		const std::string_view& GetDefaultFragmentShader() const
		{
			return DEFAULT_FG_SHADERS[static_cast<int>(m_type)];
		}
	private:
		Type m_type;
	};

	struct AtlasMetadata
	{	
		// vertical difference between baselines
		double lineHeight = 0;
		int16_t atlasType = FontAtlasType::UNKNOWN;
	};

	struct AtlasData
	{
		std::map<uint32_t, GlyphInfo> glyphs;
		AtlasMetadata meta;
		std::unique_ptr<Image::Image> img;
		Texture texture;
	};

}