Begin refactor.

src/display/bitmapfont.h

@@ -6,8 +6,26 @@
  */
 
 #pragma once
-#include <dawn/dawn.h>
+#include "../libs.h"
 #include "spritebatch.h"
+#include "tileset.h"
+
+/** Which is the first character within the font tilemap */
+#define BITMAP_FONT_CHAR_START 33
+
+/** Center a font along the X axis */
+#define BITMAP_FONT_CENTER_X 9876543
+
+/** Center a font along the Y axis */
+#define BITMAP_FONT_CENTER_Y -BITMAP_FONT_CENTER_X
+
+/** Align right edge of font to origin */
+#define BITMAP_FONT_RIGHT_X (BITMAP_FONT_CENTER_X-1)
+
+typedef struct {
+  float width, height;
+  int32_t lines;
+} bitmapfontmeasure_t;
 
 /**
  * Get the division for a given character.