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fix: align title text strictly to 8x8 tile grid to save VRAM and fix graphical glitches

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This commit is contained in:
Matteo Benedetto
2026-06-17 23:39:19 +02:00
parent a25a9eb638
commit 11b59ff2a0
2 changed files with 198 additions and 191 deletions
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prepare_title.py
+47 -40
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@@ -30,7 +30,6 @@ palette_img[(np_img >= 64) & (np_img < 128)] = 2
palette_img[(np_img >= 128) & (np_img < 192)] = 1
palette_img[np_img >= 192] = 0
# Simple 5x7 font
font = {
'A': [" ### ", "# #", "# #", "#####", "# #", "# #", "# #"],
'B': ["#### ", "# #", "# #", "#### ", "# #", "# #", "#### "],
@@ -45,7 +44,6 @@ font = {
'Z': ["#####", " #", " # ", " # ", " # ", "# ", "#####"],
'P': ["#### ", "# #", "# #", "#### ", "# ", "# ", "# "],
'R': ["#### ", "# #", "# #", "#### ", "# # ", "# # ", "# #"],
'B': ["#### ", "# #", "# #", "#### ", "# #", "# #", "#### "],
'O': [" ### ", "# #", "# #", "# #", "# #", "# #", " ### "],
'W': ["# #", "# #", "# #", "# # #", "## ##", "# #", "# #"],
'S': [" ### ", "# #", "# ", " ### ", " #", "# #", " ### "],
@@ -53,63 +51,51 @@ font = {
'T': ["#####", " # ", " # ", " # ", " # ", " # ", " # "],
'U': ["# #", "# #", "# #", "# #", "# #", "# #", " ### "],
'N': ["# #", "## #", "# # #", "# ##", "# #", "# #", "# #"],
'O': [" ### ", "# #", "# #", "# #", "# #", "# #", " ### "],
'V': ["# #", "# #", "# #", "# #", "# #", " # # ", " # "],
'L': ["# ", "# ", "# ", "# ", "# ", "# ", "#####"],
'I': [" ### ", " # ", " # ", " # ", " # ", " # ", " ### "],
'C': [" ### ", "# #", "# ", "# ", "# ", "# #", " ### "],
'D': ["#### ", "# #", "# #", "# #", "# #", "# #", "#### "],
'F': ["#####", "# ", "# ", "#### ", "# ", "# ", "# "],
'G': [" ### ", "# #", "# ", "# ###", "# #", "# #", " ### "],
'T': ["#####", " # ", " # ", " # ", " # ", " # ", " # "],
' ': [" ", " ", " ", " ", " ", " ", " "]
}
# Map lowercases to uppercases for simplicity
for c in "abcdefghijklmnopqrstuvwxyz":
if c.upper() in font:
font[c] = font[c.upper()]
is_text_mask = np.zeros_like(palette_img, dtype=bool)
def draw_text(text, start_y, scale=1, align="center"):
char_w = 5 * scale
char_h = 7 * scale
spacing = 1 * scale
if align == "center":
start_x = (160 - len(text) * (char_w + spacing)) // 2
else:
start_x = align
box_pad = 2 * scale
for y in range(start_y - box_pad, start_y + char_h + box_pad):
for x in range(start_x - box_pad, start_x + len(text) * (char_w + spacing) + box_pad):
def draw_text(text, start_y_tiles, scale=1):
tile_w = 8 * scale
tile_h = 8 * scale
start_x_tiles = (20 - len(text) * scale) // 2
start_y = start_y_tiles * 8
start_x = start_x_tiles * 8
# Draw black box perfectly aligned to tile grid
for y in range(start_y, start_y + tile_h):
for x in range(start_x, start_x + len(text) * tile_w):
if 0 <= y < 144 and 0 <= x < 160:
palette_img[y, x] = 3 # Black background
palette_img[y, x] = 3
is_text_mask[y, x] = True
for i, char in enumerate(text):
if char in font:
glyph = font[char]
# Center the 5x7 glyph inside the 8x8 logic
offset_x = (8 - 5) // 2
offset_y = (8 - 7) // 2
for row in range(7):
for col in range(5):
if glyph[row][col] == '#':
for sy in range(scale):
for sx in range(scale):
py = start_y + row * scale + sy
px = start_x + i * (char_w + spacing) + col * scale + sx
py = start_y + (row + offset_y) * scale + sy
px = start_x + i * tile_w + (col + offset_x) * scale + sx
if 0 <= py < 144 and 0 <= px < 160:
palette_img[py, px] = 0 # White text
palette_img[py, px] = 0
is_text_mask[py, px] = True
# Title: MICE MAZE
draw_text("MICE MAZE", 10, scale=2)
# Subtitle
draw_text("A GAME BY MATTEO", 45, scale=1)
draw_text("BECAUSE HE WAS BORED", 55, scale=1)
# Press start
draw_text("PRESS START", 125, scale=1)
# Align to 8x8 grid strictly
draw_text("MICE MAZE", 1, scale=2)
draw_text("A GAME BY MATTEO", 5, scale=1)
draw_text("BECAUSE HE WAS BORED", 6, scale=1)
draw_text("PRESS START", 16, scale=1)
tiles = []
is_text_tile = []
@@ -122,14 +108,21 @@ for y in range(0, 144, 8):
unique_tiles = list(collections.OrderedDict.fromkeys(tiles))
print(f"Total tiles: {len(tiles)}")
print(f"Unique tiles before reduction: {len(unique_tiles)}")
if len(unique_tiles) > 256:
print("WARNING: More than 256 unique tiles! Reducing...")
text_unique = list(collections.OrderedDict.fromkeys([tiles[i] for i in range(len(tiles)) if is_text_tile[i]]))
print(f"Text unique tiles: {len(text_unique)}")
counts = collections.Counter(tiles)
for t in text_unique:
del counts[t]
most_common = [t for t, c in counts.most_common(256 - len(text_unique))]
reduced_unique = text_unique + most_common
for i in range(len(tiles)):
if tiles[i] not in reduced_unique:
t_arr = np.array(tiles[i])
@@ -146,6 +139,22 @@ if len(unique_tiles) > 256:
tile_map = [unique_tiles.index(t) for t in tiles]
# Preview to ensure it's not broken
preview_img = np.zeros((144, 160), dtype=np.uint8)
for i, t in enumerate(tiles):
y = (i // 20) * 8
x = (i % 20) * 8
preview_img[y:y+8, x:x+8] = np.array(t)
color_map = {0: 255, 1: 170, 2: 85, 3: 0}
preview_rgb = np.zeros((144, 160, 3), dtype=np.uint8)
for y in range(144):
for x in range(160):
c = color_map[preview_img[y, x]]
preview_rgb[y, x] = [c, c, c]
Image.fromarray(preview_rgb).save('/tmp/preview_title_fixed.png')
c_tiles = []
for tile in unique_tiles:
tile_data = []
@@ -176,5 +185,3 @@ with open('src/title_bg.c', 'w') as f:
for i in range(0, len(tile_map), 20):
f.write(" " + ", ".join([f"0x{b:02X}" for b in tile_map[i:i+20]]) + ",\n")
f.write("};\n")
print("Generated src/title_bg.h and src/title_bg.c")