1 files changed, 147 insertions, 0 deletions
diff --git a/Scripts/generate_fonts.py b/Scripts/generate_fonts.py
new file mode 100644
index 0000000..ef5bfc5
--- /dev/null
+++ b/Scripts/generate_fonts.py
@@ -0,0 +1,147 @@
+#!/usr/bin/env python3
+
+# python3 -m pip install pillow
+# License: HPND license.
+from PIL import Image, ImageFont, ImageDraw
+
+import math
+
+# Use a power of 2 pixels per character so we can evenly divide the plane.
+font_pixels = 128
+full_ratio = 0.75
+half_ratio = 0.5
+full_sz = int(font_pixels * full_ratio)
+half_sz = int(font_pixels * half_ratio)
+layout_engine = ImageFont.Layout.BASIC
+
+unifont = ImageFont.truetype("Fonts/unifont-15.0.01.ttf", full_sz, layout_engine=layout_engine)
+unifont_half = ImageFont.truetype("Fonts/unifont-15.0.01.ttf", half_sz, layout_engine=layout_engine)
+
+noto_sans_mono = ImageFont.truetype("Fonts/Noto_Sans_Mono/NotoSansMono-VariableFont_wdth,wght.ttf", full_sz, layout_engine=layout_engine)
+
+noto_sans_sc_half = ImageFont.truetype("Fonts/Noto_Sans_Simplified_Chinese/NotoSansSC-Regular.otf", half_sz, layout_engine=layout_engine)
+
+noto_sans_kr_half = ImageFont.truetype("Fonts/Noto_Sans_Korean/NotoSansKR-Regular.otf", half_sz, layout_engine=layout_engine)
+
+n_rows = 64
+n_cols = 128
+
+class FontInfo:
+    def __init__(self, font, dy):
+        self.font = font
+        self.dy = dy
+
+def allow_range(allowlist, lo_hi, font = None, dy = 0):
+    for i in range(lo_hi[0], lo_hi[1] + 1):
+        allowlist[i] = FontInfo(font, dy)
+def ban_range(allowlist, lo, hi):
+    for i in range(lo, hi + 1):
+        del allowlist[i]
+allowlist = {}
+# ASCII
+basic_latin = (32, 126)
+allow_range(allowlist, basic_latin, font=noto_sans_mono, dy = -20)
+# Latin-1 supplement
+latin_1_supplement = (0x00A1, 0x00ff)
+allow_range(allowlist, latin_1_supplement, font = noto_sans_mono)
+# Latin extended-A
+latin_extended_a = (0x0100, 0x017f)
+allow_range(allowlist, latin_extended_a, font = noto_sans_mono)
+# Latin extended-B
+latin_extended_b = (0x0180, 0x024f)
+allow_range(allowlist, latin_extended_b, font = noto_sans_mono)
+# Spacing modifier letters
+ipa_extensions = (0x0250, 0x02af)
+allow_range(allowlist, ipa_extensions, font = unifont)
+# Greek and Coptic
+greek = (0x0370, 0x03ff)
+allow_range(allowlist, greek, font = noto_sans_mono)
+ban_range(allowlist, 0x0378, 0x03a2)
+# Cyrillic
+cyrillic = (0x0400, 0x04ff)
+allow_range(allowlist, cyrillic, font = unifont)
+# Currency symbols
+currency_symbols = (0x20a0, 0x20c0)
+allow_range(allowlist, currency_symbols, font = noto_sans_mono)
+
+# CJK
+#
+hangul_jamo = (0x1100, 0x11FF)
+allow_range(allowlist, hangul_jamo, font = noto_sans_kr_half)
+#
+general_punctuation = (0x2000, 0x206f)
+allow_range(allowlist, general_punctuation, font = noto_sans_mono)
+#
+kangxi_radicals = (0x2f00, 0x2fdf)
+allow_range(allowlist, kangxi_radicals, font = noto_sans_sc_half)
+#
+cjk_symbols_and_punctuation = (0x3000, 0x303f)
+allow_range(allowlist, cjk_symbols_and_punctuation, font = noto_sans_sc_half)
+#
+hiragana = (0x3041, 0x309f)
+allow_range(allowlist, hiragana, font = noto_sans_sc_half)
+ban_range(allowlist, 0x3097, 0x3098)
+#
+katakana = (0x30a0, 0x30ff)
+allow_range(allowlist, katakana, font = noto_sans_sc_half)
+#
+hangul_compatibility_jamo = (0x3130, 0x318f)
+allow_range(allowlist, hangul_compatibility_jamo, font = noto_sans_sc_half)
+#
+enclosed_cjk_letters_and_months = (0x3200, 0x32FF)
+allow_range(allowlist, enclosed_cjk_letters_and_months, font = noto_sans_sc_half)
+#
+cjk_compatibility = (0x3300, 0x33ff)
+allow_range(allowlist, cjk_compatibility, font = noto_sans_sc_half)
+#
+cjk_unified_extension_a = (0x3400, 0x4dbf)
+allow_range(allowlist, cjk_unified_extension_a, font = noto_sans_sc_half)
+#
+cjk_ideographs = (0x4e00, 0x9fff)
+allow_range(allowlist, cjk_ideographs, font = noto_sans_sc_half)
+#
+hangul_syllables = (0xAC00, 0xD7A3)
+allow_range(allowlist, hangul_syllables, font = noto_sans_kr_half)
+#
+halfwidth_and_fullwidth = (0xff00, 0xffef)
+allow_range(allowlist, halfwidth_and_fullwidth, font = noto_sans_sc_half)
+
+def in_range(x, range_pair) -> bool:
+    return x >= range_pair[0] and x <= range_pair[1]
+
+max_char = max(allowlist)
+print("max char: {}".format(max_char))
+print("num chars: {}".format(len(allowlist)))
+total_rows = math.ceil(max_char / n_cols)
+print("total rows {}".format(total_rows))
+total_textures = math.ceil(total_rows / n_rows)
+print("total textures {}".format(total_textures))
+
+for nth_texture in range(0, total_textures):
+    # Create an 8K grayscale ("L") or black and white ("1") image
+    image = Image.new(mode="1", size=(8192,8192), color=0)
+    draw = ImageDraw.Draw(image)
+
+    row_begin = nth_texture * n_rows
+
+    for row in range(row_begin, row_begin + n_rows):
+        line = ""
+        for col in range(0, n_cols):
+            # Generate the unicode character for this spot.
+            n = row * n_cols + col
+            char = None
+            font_info = None
+            if n in allowlist.keys():
+                char = chr(n)
+                font_info = allowlist[n]
+            else:
+                char = " "
+                font_info = FontInfo(unifont, 0)
+            # Hack: Chinese, Japanese, and Korean characters are all double
+            # width and are all on textures [1,6]. To fit them in the same
+            # grid, we use a half-size font.
+            draw.text((col * font_pixels / 2, (row - row_begin) * font_pixels +
+                font_info.dy), char, font=font_info.font, fill=255)
+
+    image.save("Fonts/Bitmaps/font-%01d.png" % nth_texture)
+