add font glyph drawing

1 files changed, 43 insertions, 0 deletions

diff --git a/src/common/Font.hpp b/src/common/Font.hpp
new file mode 100644
index 0000000..a594add
--- /dev/null
+++ b/src/common/Font.hpp
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <filesystem>
+#include <stb_truetype.h>
+
+
+struct MonoBitmap {
+    int32_t width;
+    int32_t height;
+    std::unique_ptr<uint8_t> pixels;
+};
+
+
+struct Glyph {
+    int32_t xoff;
+    int32_t yoff;
+    int32_t xadvance;
+    MonoBitmap bitmap;
+};
+
+
+class Font {
+public:
+    ~Font();
+
+    bool Init(const char* path, int font_size);
+    void Deinit();
+
+    void LoadGlyph(Glyph& glyph, uint32_t codepoint);
+
+
+private:
+    const char* m_file_content = nullptr;
+
+    float m_font_scale;
+    int m_font_baseline;
+    int m_font_yadvance;
+
+    stbtt_fontinfo m_font_info;
+    Glyph m_glyphs['~' - ' ' + 1];
+};
+
+