modcasioplot: add original fonts for ASCII on CG-50

ports/fxcg50/Makefile

@@ -3,7 +3,7 @@ include ../../py/mkenv.mk
 SH_CFLAGS := -DFXCG50
 SH_LDFLAGS := -T fxcg50.ld -ljustui-cg -lm -lgint-cg -lc -lgint-cg -lgcc
 
-SH_ASSETS := img_modifier_states.png
+SH_ASSETS := img_modifier_states.png font_9.png font_13.png font_19.png
 SH_METADATA := fxconv-metadata.txt
 SH_CONVFLAGS := --cg
 

ports/fxcg50/fxconv-metadata.txt

@@ -2,3 +2,30 @@ img_*.png:
   type: bopti-image
   name_regex: (.*)\.png \1
   profile: p4
+
+font_9.png:
+  name: font_9
+  type: font
+  charset: print
+  grid.size: 9x10
+  grid.padding: 0
+  grid.border: 0
+  proportional: true
+
+font_13.png:
+  name: font_13
+  type: font
+  charset: print
+  grid.size: 12x17
+  grid.padding: 0
+  grid.border: 0
+  proportional: true
+
+font_19.png:
+  name: font_19
+  type: font
+  charset: print
+  grid.size: 18x23
+  grid.padding: 0
+  grid.border: 0
+  proportional: true

ports/sh/modcasioplot.c

@@ -15,6 +15,10 @@
 extern font_t font_4x4;
 extern font_t font_4x6;
 extern font_t font_5x7;
+#else
+extern font_t font_9;
+extern font_t font_13;
+extern font_t font_19;
 #endif
 
 /* TODO: casioplot: Call show_screen() when program finishes */
@@ -127,9 +131,7 @@ static mp_obj_t draw_string(size_t n, mp_obj_t const *args)
 #ifdef FX9860G
     font_t const *fonts[3] = { &font_4x4, &font_4x4, &font_5x7 };
 #else
-    /* TODO: casioplot: draw_string(): Add fonts for CG50 */
-    font_t const *fonts[3] = {
-        dfont_default(), dfont_default(), dfont_default() };
+    font_t const *fonts[3] = { &font_9, &font_13, &font_19 };
 #endif
 
     color_t color = C_BLACK;