Initial commit

LibFont/include/LibFont/Font.h

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+#pragma once
+
+#include <BAN/ByteSpan.h>
+#include <BAN/HashMap.h>
+#include <BAN/StringView.h>
+#include <BAN/Vector.h>
+
+namespace LibFont
+{
+
+	class Font
+	{
+	public:
+		Font() = default;
+		Font(BAN::HashMap<uint32_t, uint32_t>&& glyph_offsets, BAN::Vector<uint8_t>&& glyph_data, uint32_t width, uint32_t height, uint32_t pitch)
+			: m_glyph_offsets(BAN::move(glyph_offsets))
+			, m_glyph_data(BAN::move(glyph_data))
+			, m_width(width)
+			, m_height(height)
+			, m_pitch(pitch)
+		{ }
+
+		static BAN::ErrorOr<Font> load(BAN::StringView path);
+		static BAN::ErrorOr<Font> load(BAN::ConstByteSpan font_data);
+#if __is_kernel
+		static BAN::ErrorOr<Font> prefs();
+#endif
+
+		uint32_t width() const { return m_width; }
+		uint32_t height() const { return m_height; }
+		uint32_t pitch() const { return m_pitch; }
+
+		bool has_glyph(uint32_t codepoint) const { return glyph(codepoint) != nullptr; }
+		const uint8_t* glyph(uint32_t codepoint) const
+		{
+			auto it = m_glyph_offsets.find(codepoint);
+			if (it == m_glyph_offsets.end())
+				return nullptr;
+			return m_glyph_data.data() + it->value;
+		}
+
+	private:
+		BAN::HashMap<uint32_t, uint32_t> m_glyph_offsets;
+		BAN::Vector<uint8_t> m_glyph_data;
+		uint32_t m_width = 0;
+		uint32_t m_height = 0;
+		uint32_t m_pitch = 0;
+	};
+
+}

LibFont/include/LibFont/PSF.h

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+#pragma once
+
+#include <LibFont/Font.h>
+
+namespace LibFont
+{
+
+	bool is_psf1(BAN::ConstByteSpan);
+	BAN::ErrorOr<Font> parse_psf1(BAN::ConstByteSpan);
+
+	bool is_psf2(BAN::ConstByteSpan);
+	BAN::ErrorOr<Font> parse_psf2(BAN::ConstByteSpan);
+
+}