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Кобелев Андрей Андреевич
2026-03-10 22:54:23 +03:00
parent c7636ebd6f
commit a111352dc5
313 changed files with 274971 additions and 1409 deletions
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lib/epdiy/scripts/fontconvert.py Normal file
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#!python3
import sys
# inclusive unicode code point intervals
# must not overlap and be in ascending order
# modify intervals here
# however if the "string" command line argument is used these are ignored
intervals = [
(32, 126),
(160, 255),
# punctuation
(0x2010, 0x205F),
# arrows
(0x2190, 0x21FF),
# math
#(0x2200, 0x22FF),
# symbols
(0x2300, 0x23FF),
# box drawing
#(0x2500, 0x259F),
# geometric shapes
(0x25A0, 0x25FF),
# misc symbols
(0x2600, 0x26F0),
(0x2700, 0x27BF),
# powerline symbols
#(0xE0A0, 0xE0A2),
#(0xE0B0, 0xE0B3),
#(0x1F600, 0x1F680),
]
try:
import freetype
except ImportError as error:
sys.exit("To run this script the freetype module needs to be installed.\nThis can be done using:\npip install freetype-py")
import zlib
import sys
import re
import math
import argparse
from collections import namedtuple
#see https://freetype-py.readthedocs.io/en/latest/ for documentation
parser = argparse.ArgumentParser(description="Generate a header file from a font to be used with epdiy.")
parser.add_argument("name", action="store", help="name of the font.")
parser.add_argument("size", type=int, help="font size to use.")
parser.add_argument("fontstack", action="store", nargs='+', help="list of font files, ordered by descending priority. This is not actually implemented please just use one file for now.")
parser.add_argument("--compress", dest="compress", action="store_true", help="compress glyph bitmaps.")
parser.add_argument("--additional-intervals", dest="additional_intervals", action="append", help="Additional code point intervals to export as min,max. This argument can be repeated.")
parser.add_argument("--string", action="store", help="A string of all required characters. intervals are made up of this" )
args = parser.parse_args()
command_line = ""
prev_arg = ""
for arg in sys.argv:
# ~ if prev_arg == "--string":
# ~ command_line = command_line + " '" + arg +"'"
# ~ else:
command_line = command_line + " " + arg
# ~ prev_arg = arg
# ~ print (command_line)
GlyphProps = namedtuple("GlyphProps", ["width", "height", "advance_x", "left", "top", "compressed_size", "data_offset", "code_point"])
font_stack = [freetype.Face(f) for f in args.fontstack]
font_files = args.fontstack
face_index = 0
font_file = font_files[face_index]
compress = args.compress
size = args.size
font_name = args.name
for face in font_stack:
# shift by 6 bytes, because sizes are given as 6-bit fractions
# the display has about 150 dpi.
face.set_char_size(size << 6, size << 6, 150, 150)
# assign intervals from argument parrameters ie. handle the string arg
if args.string != None:
font_file = font_files[face_index]
string = " " + args.string # always add space to the string it is easily forgotten
chars = sorted(set(string))
#make array of code pointscode_ponts.append(ord(char))
code_points = list()
intervals = [] # empty the intevals array NB. if you want to allways add default characters comment out this line
# go through the sorted characters and make the intervals
for char in chars:
if( face.get_char_index(ord(char)) != 0 ):
# this character is in the font file so add it to the new string.
code_points.append(ord(char))
else:
print("The character ", char, " is not available in ", font_file, file=sys.stderr)
lower = code_points[0]
len_x = len(code_points)
x = 0
while x < len_x:
# ~ print ("loop value x = ", x , file=sys.stderr)
a = code_points[x];
b = a;
if( x < len_x - 1):
b = code_points[x + 1];
if( a == b - 1 ):
# ~ print("sequential", a, b, file=sys.stderr)
if( lower == -1):
lower = a
else:
# ~ print("non sequential", a, b , file=sys.stderr)
if( lower == -1):
# ~ print("single character")
interval = (a , a)
else:
interval = (lower, a)
# ~ print("interval", interval , file=sys.stderr)
intervals.append(interval)
lower = -1
x = x + 1
# base intervals are assigned dditional intervals from arguments
add_ints = []
if args.additional_intervals != None:
add_ints = [tuple([int(n, base=0) for n in i.split(",")]) for i in args.additional_intervals]
intervals = sorted(intervals + add_ints)
# ~ print("Intervals are now: ", intervals, file=sys.stderr)
def norm_floor(val):
return int(math.floor(val / (1 << 6)))
def norm_ceil(val):
return int(math.ceil(val / (1 << 6)))
for face in font_stack:
# shift by 6 bytes, because sizes are given as 6-bit fractions
# the display has about 150 dpi.
face.set_char_size(size << 6, size << 6, 150, 150)
def chunks(l, n):
for i in range(0, len(l), n):
yield l[i:i + n]
total_size = 0
total_packed = 0
all_glyphs = []
# new globals
total_chars = 0
ascender = 0
descender = 100
f_height = 0
def load_glyph(code_point):
global face_index
face_index = 0
while face_index < len(font_stack):
face = font_stack[face_index]
glyph_index = face.get_char_index(code_point)
if glyph_index > 0:
face.load_glyph(glyph_index, freetype.FT_LOAD_RENDER)
#count characters found and find bounds of characters
global ascender
if ascender < face.size.ascender:
ascender = face.size.ascender
global descender
if descender > face.size.descender:
descender = face.size.descender
global f_height
if f_height < face.size.height:
f_height = face.size.height
global total_chars
total_chars += 1
return face
break
face_index += 1
# this needs work
# this needs to be handled better to show failed character and continue not just die a questionable death
# this appears to have been designed to combine several font files
# but that is not clear to the end user and this then looks like a bug
print (f"falling back to font {face_index} for {chr(code_point)}.", file=sys.stderr)
raise ValueError(f"code point {code_point} not found in font stack!")
for i_start, i_end in intervals:
for code_point in range(i_start, i_end + 1):
# handle missing characters in font file
if( face.get_char_index(code_point) == 0 ):
print("Character ", chr(code_point), "(", code_point, ") is not in ", font_file, file=sys.stderr)
continue
face = load_glyph(code_point)
bitmap = face.glyph.bitmap
pixels = []
px = 0
for i, v in enumerate(bitmap.buffer):
y = i / bitmap.width
x = i % bitmap.width
if x % 2 == 0:
px = (v >> 4)
else:
px = px | (v & 0xF0)
pixels.append(px);
px = 0
# eol
if x == bitmap.width - 1 and bitmap.width % 2 > 0:
pixels.append(px)
px = 0
packed = bytes(pixels);
total_packed += len(packed)
compressed = packed
if compress:
compressed = zlib.compress(packed)
glyph = GlyphProps(
width = bitmap.width,
height = bitmap.rows,
advance_x = norm_floor(face.glyph.advance.x),
left = face.glyph.bitmap_left,
top = face.glyph.bitmap_top,
compressed_size = len(compressed),
data_offset = total_size,
code_point = code_point,
)
total_size += len(compressed)
all_glyphs.append((glyph, compressed))
# pipe seems to be a good heuristic for the "real" descender
# face = load_glyph(ord('|'))
# removed as max descender and assender are handled above
glyph_data = []
glyph_props = []
for index, glyph in enumerate(all_glyphs):
props, compressed = glyph
glyph_data.extend([b for b in compressed])
glyph_props.append(props)
print("", file=sys.stderr)
print(f"Original font file {font_file} as {font_name} using {total_chars} characters", file=sys.stderr)
print("total", total_packed, file=sys.stderr)
print("compressed", total_size, file=sys.stderr)
print("#pragma once")
print("#include \"epdiy.h\"")
# add font file origin and characters at the head of the output file
print("/*")
print ( "Created with")
print(command_line)
print(f"As '{font_name}' with available {total_chars} characters")
for i, g in enumerate(glyph_props):
print (f"{chr(g.code_point)}", end ="" )
print("")
print("*/")
print(f"const uint8_t {font_name}_Bitmaps[{len(glyph_data)}] = {{")
for c in chunks(glyph_data, 16):
print (" " + " ".join(f"0x{b:02X}," for b in c))
print ("};");
print ('// GlyphProps[width, height, advance_x, left, top, compressed_size, data_offset, code_point]')
print(f"const EpdGlyph {font_name}_Glyphs[] = {{")
for i, g in enumerate(glyph_props):
print (" { " + ", ".join([f"{a}" for a in list(g[:-1])]),"},", f"// '{chr(g.code_point) if g.code_point != 92 else '<backslash>'}'")
print ("};");
print(f"const EpdUnicodeInterval {font_name}_Intervals[] = {{")
offset = 0
for i_start, i_end in intervals:
print (f" {{ 0x{i_start:X}, 0x{i_end:X}, 0x{offset:X} }},")
offset += i_end - i_start + 1
print ("};");
print(f"const EpdFont {font_name} = {{")
print(f" {font_name}_Bitmaps, // (*bitmap) Glyph bitmap pointer, all concatenated together")
print(f" {font_name}_Glyphs, // glyphs Glyph array")
print(f" {font_name}_Intervals, // intervals Valid unicode intervals for this font")
print(f" {len(intervals)}, // interval_count Number of unicode intervals.intervals")
print(f" {1 if compress else 0}, // compressed Does this font use compressed glyph bitmaps?")
print(f" {norm_ceil(f_height)}, // advance_y Newline distance (y axis)")
print(f" {norm_ceil(ascender)}, // ascender Maximal height of a glyph above the base line")
print(f" {norm_floor(descender)}, // descender Maximal height of a glyph below the base line")
print("};")
print("/*")
print("Included intervals")
for i_start, i_end in intervals:
print (f" ( {i_start}, {i_end}), ie. '{chr(i_start)}' - '{chr(i_end)}'")
print("Included intervals", file=sys.stderr)
for i_start, i_end in intervals:
print (f" ( {i_start}, {i_end}), ie. '{chr(i_start)}' - '{chr(i_end)}'", file=sys.stderr)
print("")
print("*/")