1 files changed, 51 insertions, 0 deletions
diff --git a/code/amr_fonts.h b/code/amr_fonts.h
new file mode 100644
index 0000000..f44893c
--- /dev/null
+++ b/code/amr_fonts.h
@@ -0,0 +1,51 @@
+#ifndef AMR_FONTS_H
+#define AMR_FONTS_H
+
+typedef struct amr_glyph_info {
+  u32 charset_start_index;
+  u32 charset_end_index;
+} amr_glyph_info;
+
+typedef struct amr_font_details_debug {
+  i32 advance;
+  i32 lsb;
+  i32 x0, y0, x1, y1;
+  i32 kern;
+  f32 lx;
+  f32 ly;
+  i32 byte_offset;
+  i32 baseline;
+} debug_font_details;
+
+typedef struct amr_font_state_debug {
+  stbtt_fontinfo font_info;
+} amr_font_state;
+// initialise a font and loads the font in the fontbuffer
+// input: 
+// - font path
+// - font buffer, must be initialised by caller
+// - size of the font file, must be known beforehand
+// output:
+// - error code
+u32 amr_InitFont(const u8 *FontPath, u8 *FontBuffer, u32 FontFz); 
+u32 amr_GetGlyphIdFromCodepoint(amr_glyph_info glyph, u32 *GlyphIndexArray, u32 Codepoint);
+
+u32 amr_InitFont(stbtt_fontinfo *font_info, const char *FontPath, u8 *FontBuffer, u32 FontSz)
+{
+  PlatformDebugFileRead(FontPath, FontBuffer, FontSz);
+  if (!stbtt_InitFont(font_info, FontBuffer, 0))
+  {
+    printf("ERROR: failed to read arial font");
+    assert(1 == 0);
+  }
+
+  return 0;
+}
+
+u32 amr_GetGlyphIdFromCodepoint(amr_glyph_info glyph, u32 *GlyphIndexArray, u32 Codepoint)
+{
+  u32 glyph_id = *(GlyphIndexArray + (Codepoint - glyph.charset_start_index));
+  return glyph_id;
+}
+
+#endif