Kernel: Make some basic bitmap font parsing code

2023-02-22 22:28:12 +02:00
parent a3e9e7d125
commit 0e668738dc
2 changed files with 271 additions and 0 deletions
--- a/kernel/include/kernel/Font.h
+++ b/kernel/include/kernel/Font.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <BAN/HashMap.h>
+#include <BAN/StringView.h>
+
+namespace Kernel
+{
+
+	class Font
+	{
+	public:
+		static BAN::ErrorOr<Font> load(BAN::StringView);
+
+		uint32_t width() const { return m_width; }
+		uint32_t height() const { return m_height; }
+		uint32_t pitch() const { return m_pitch; }
+
+		bool has_glyph(uint16_t) const;
+		const uint8_t* glyph(uint16_t) const;
+
+	private:
+		static BAN::ErrorOr<Font> parse_psf1(const BAN::Vector<uint8_t>&);
+		static BAN::ErrorOr<Font> parse_psf2(const BAN::Vector<uint8_t>&);
+
+	private:
+		BAN::HashMap<uint16_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;
+	};
+
+}