Add Chinese text rendering support

Extend the bitmap font pipeline with the Chinese Joker glyph subset and encode supported UTF-8 text for Tonc TTE. Move the affine map clear of the expanded font, add a compile-time VRAM overlap guard, and cover every custom glyph with host tests.

source/main.c

@@ -25,6 +25,31 @@
 #include "soundbank.h"
 #include "soundbank_bin.h"
 
+enum
+{
+    TTE_ASCII_GLYPH_COUNT = 96,
+    FONT_TILES_PER_ROW = 16,
+    CHARBLOCK_4BPP_TILE_COUNT = 512,
+    SCREENBLOCK_4BPP_TILE_COUNT = 64,
+    CHINESE_GLYPH_COUNT = 0
+#define CHINESE_GLYPH(codepoint) +1
+#include "def_chinese_glyph_table.h"
+#undef CHINESE_GLYPH
+    ,
+    TTE_FONT_TILE_COUNT =
+        TTE_ASCII_GLYPH_COUNT +
+        ((CHINESE_GLYPH_COUNT + FONT_TILES_PER_ROW - 1) / FONT_TILES_PER_ROW) * FONT_TILES_PER_ROW,
+    TTE_FONT_FIRST_TILE = TTE_CBB * CHARBLOCK_4BPP_TILE_COUNT,
+    TTE_FONT_END_TILE = TTE_FONT_FIRST_TILE + TTE_FONT_TILE_COUNT,
+    AFFINE_BG_MAP_FIRST_TILE = AFFINE_BG_SBB * SCREENBLOCK_4BPP_TILE_COUNT,
+    AFFINE_BG_MAP_END_TILE = AFFINE_BG_MAP_FIRST_TILE + SCREENBLOCK_4BPP_TILE_COUNT,
+};
+
+_Static_assert(
+    TTE_FONT_END_TILE <= AFFINE_BG_MAP_FIRST_TILE || AFFINE_BG_MAP_END_TILE <= TTE_FONT_FIRST_TILE,
+    "TTE font tiles overlap the affine background map"
+);
+
 void init()
 {
     rng_init();