Start font reading support.

src/fonts/TrueTypeFont.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include "IFont.h"
+
+#include <iostream>
+#include <stdint.h>
+
+class TrueTypeFont : public IFont
+{
+public:
+
+    using Fixed = int32_t;
+    using LongDateTime = int64_t;
+    using FWord = int16_t;
+
+    // https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6head.html
+    struct HeadTable
+    {
+        Fixed version{0};
+        Fixed fontRevision{0};
+        uint32_t checksumAdjustment{0};
+        uint32_t magicNumber{0};
+        uint16_t flags{0};
+        uint16_t unitsPerEm{0};
+        LongDateTime created{0};
+        LongDateTime modified{0};
+        FWord xMin{0};
+        FWord yMin{0};
+        FWord xMax{0};
+        FWord yMax{0};
+        uint16_t macStyle{0};
+        uint16_t lowestRecPPEM{0};
+        int16_t fontDirectionHint{0};
+        int16_t indexToLocFormat{0};
+        int16_t glyphDataFormat{0};
+    };
+
+    std::string logHeadTable() const;
+
+    void setHeadTable(const HeadTable& table)
+    {
+        mHeadTable = table;
+    }
+
+    void dumpInfo() override
+    {
+        std::cout << "Got ttf" << std::endl;
+    }
+
+private:
+
+    HeadTable mHeadTable;
+};