mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 21:34:08 -07:00
242 lines
8.9 KiB
Python
Executable file
242 lines
8.9 KiB
Python
Executable file
#!/usr/bin/env python3
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import math
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import cairo
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import font_loader
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import packer
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# Representation of a rendered glyph
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class Glyph:
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def __init__(self, ctx, renderstyle, char, idx, face, size):
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self.renderstyle = renderstyle
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self.char = char
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self.idx = idx
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self.face = face
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self.size = size
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self.glyph = (idx, 0, 0)
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if ctx.get_font_face() != self.face:
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ctx.set_font_face(self.face)
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ctx.set_font_size(self.size)
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extents = ctx.glyph_extents([self.glyph])
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self.xadvance = round(extents[4])
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# Find the bounding box of strokes and/or fills:
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inf = 1e300 * 1e300
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bb = [inf, inf, -inf, -inf]
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if "stroke" in self.renderstyle:
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for _c, w in self.renderstyle["stroke"]:
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ctx.set_line_width(w)
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ctx.glyph_path([self.glyph])
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e = ctx.stroke_extents()
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bb = (min(bb[0], e[0]), min(bb[1], e[1]), max(bb[2], e[2]), max(bb[3], e[3]))
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ctx.new_path()
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if "fill" in self.renderstyle:
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ctx.glyph_path([self.glyph])
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e = ctx.fill_extents()
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bb = (min(bb[0], e[0]), min(bb[1], e[1]), max(bb[2], e[2]), max(bb[3], e[3]))
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ctx.new_path()
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bb = (math.floor(bb[0]), math.floor(bb[1]), math.ceil(bb[2]), math.ceil(bb[3]))
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self.x0 = -bb[0]
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self.y0 = -bb[1]
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self.w = bb[2] - bb[0]
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self.h = bb[3] - bb[1]
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def pack(self, packer_instance):
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self.pos = packer_instance.pack(self.w, self.h)
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def render(self, ctx):
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if ctx.get_font_face() != self.face:
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ctx.set_font_face(self.face)
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ctx.set_font_size(self.size)
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ctx.save()
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ctx.translate(self.x0, self.y0)
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ctx.translate(self.pos.x, self.pos.y)
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# Render each stroke, and then each fill on top of it
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if "stroke" in self.renderstyle:
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for (r, g, b, a), w in self.renderstyle["stroke"]:
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ctx.set_line_width(w)
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ctx.set_source_rgba(r, g, b, a)
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ctx.glyph_path([self.glyph])
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ctx.stroke()
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if "fill" in self.renderstyle:
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for r, g, b, a in self.renderstyle["fill"]:
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ctx.set_source_rgba(r, g, b, a)
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ctx.glyph_path([self.glyph])
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ctx.fill()
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ctx.restore()
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# Load the set of characters contained in the given text file
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def load_char_list(filename):
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with open(filename, encoding="utf-8") as f:
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chars = f.read()
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return set(chars)
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# Construct a Cairo context and surface for rendering text with the given parameters
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def setup_context(width, height, renderstyle):
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surface_format = cairo.FORMAT_ARGB32 if "colour" in renderstyle else cairo.FORMAT_A8
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surface = cairo.ImageSurface(surface_format, width, height)
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ctx = cairo.Context(surface)
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ctx.set_line_join(cairo.LINE_JOIN_ROUND)
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return ctx, surface
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def generate_font(outname, ttf_names, loadopts, size, renderstyle, dsizes):
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face_list = []
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index_list = []
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for i in range(len(ttf_names)):
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(face, indices) = font_loader.create_cairo_font_face_for_file(
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f"../../../binaries/data/tools/fontbuilder/fonts/{ttf_names[i]}", 0, loadopts
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)
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face_list.append(face)
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if ttf_names[i] not in dsizes:
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dsizes[ttf_names[i]] = 0
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index_list.append(indices)
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(ctx, _) = setup_context(1, 1, renderstyle)
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# TODO: this gets the line height from the default font
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# while entire texts can be in the fallback font
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ctx.set_font_face(face_list[0])
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ctx.set_font_size(size + dsizes[ttf_names[0]])
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(_, _, linespacing, _, _) = ctx.font_extents()
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# Estimate the 'average' height of text, for vertical center alignment
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charheight = round(ctx.glyph_extents([(index_list[0]("I"), 0.0, 0.0)])[3])
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# Translate all the characters into glyphs
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# (This is inefficient if multiple characters have the same glyph)
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glyphs = []
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# for c in chars:
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for c in range(0x20, 0xFFFE):
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for i in range(len(index_list)):
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idx = index_list[i](chr(c))
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if c == 0xFFFD and idx == 0: # use "?" if the missing-glyph glyph is missing
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idx = index_list[i]("?")
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if idx:
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glyphs.append(
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Glyph(ctx, renderstyle, chr(c), idx, face_list[i], size + dsizes[ttf_names[i]])
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)
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break
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# Sort by decreasing height (tie-break on decreasing width)
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glyphs.sort(key=lambda g: (-g.h, -g.w))
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# Try various sizes to pack the glyphs into
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sizes = []
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for h in [32, 64, 128, 256, 512, 1024, 2048, 4096]:
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sizes.append((h, h))
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sizes.append((h * 2, h))
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sizes.sort(
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key=lambda w_h: (w_h[0] * w_h[1], max(w_h[0], w_h[1]))
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) # prefer smaller and squarer
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for w, h in sizes:
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try:
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# Using the dump pacher usually creates bigger textures, but runs faster
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# In practice the size difference is so small it always ends up in the same size
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packer_instance = packer.DumbRectanglePacker(w, h)
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for g in glyphs:
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g.pack(packer_instance)
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except packer.OutOfSpaceError:
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continue
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ctx, surface = setup_context(w, h, renderstyle)
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for g in glyphs:
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g.render(ctx)
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surface.write_to_png(f"{outname}.png")
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# Output the .fnt file with all the glyph positions etc
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with open(f"{outname}.fnt", "w", encoding="utf-8") as fnt:
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fnt.write("101\n")
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fnt.write(f"{w} {h}\n")
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fnt.write("%s\n" % ("rgba" if "colour" in renderstyle else "a"))
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fnt.write(f"{len(glyphs)}\n")
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fnt.write(f"{linespacing}\n")
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fnt.write(f"{charheight}\n")
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for g in glyphs:
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x0 = g.x0
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y0 = g.y0
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# UGLY HACK: see https://gitea.wildfiregames.com/0ad/0ad/issues/1039 ;
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# to handle a-macron-acute characters without the hassle of
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# doing proper OpenType GPOS layout (which the font
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# doesn't support anyway), we'll just shift the combining acute
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# glyph by an arbitrary amount to make it roughly the right
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# place when used after an a-macron glyph.
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if ord(g.char) == 0x0301:
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y0 += charheight / 3
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fnt.write(
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f"{ord(g.char)} {g.pos.x} {h - g.pos.y} {g.w} {g.h} {-x0} {g.xadvance}\n"
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)
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return
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print("Failed to fit glyphs in texture")
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filled = {"fill": [(1, 1, 1, 1)]}
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stroked1 = {
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"colour": True,
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"stroke": [((0, 0, 0, 1), 2.0), ((0, 0, 0, 1), 2.0)],
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"fill": [(1, 1, 1, 1)],
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}
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stroked2 = {"colour": True, "stroke": [((0, 0, 0, 1), 2.0)], "fill": [(1, 1, 1, 1), (1, 1, 1, 1)]}
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stroked3 = {"colour": True, "stroke": [((0, 0, 0, 1), 2.5)], "fill": [(1, 1, 1, 1), (1, 1, 1, 1)]}
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# For extra glyph support, add your preferred font to the font array
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Sans = (["LinBiolinum_Rah.ttf", "FreeSans.ttf"], font_loader.FT_LOAD_DEFAULT)
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Sans_Bold = (["LinBiolinum_RBah.ttf", "FreeSansBold.ttf"], font_loader.FT_LOAD_DEFAULT)
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Sans_Italic = (["LinBiolinum_RIah.ttf", "FreeSansOblique.ttf"], font_loader.FT_LOAD_DEFAULT)
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SansMono = (["DejaVuSansMono.ttf", "FreeMono.ttf"], font_loader.FT_LOAD_DEFAULT)
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Serif = (["texgyrepagella-regular.otf", "FreeSerif.ttf"], font_loader.FT_LOAD_NO_HINTING)
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Serif_Bold = (["texgyrepagella-bold.otf", "FreeSerifBold.ttf"], font_loader.FT_LOAD_NO_HINTING)
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# Define the size differences used to render different fallback fonts
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# I.e. when adding a fallback font has smaller glyphs than the original, you can bump it
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dsizes = {"HanaMinA.ttf": 2} # make the glyphs for the (chinese font 2 pts bigger)
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fonts = (
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("mono-10", SansMono, 10, filled),
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("mono-stroke-10", SansMono, 10, stroked2),
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("sans-9", Sans, 9, filled),
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("sans-10", Sans, 10, filled),
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("sans-12", Sans, 12, filled),
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("sans-13", Sans, 13, filled),
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("sans-14", Sans, 14, filled),
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("sans-16", Sans, 16, filled),
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("sans-bold-12", Sans_Bold, 12, filled),
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("sans-bold-13", Sans_Bold, 13, filled),
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("sans-bold-14", Sans_Bold, 14, filled),
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("sans-bold-16", Sans_Bold, 16, filled),
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("sans-bold-18", Sans_Bold, 18, filled),
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("sans-bold-20", Sans_Bold, 20, filled),
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("sans-bold-22", Sans_Bold, 22, filled),
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("sans-bold-24", Sans_Bold, 24, filled),
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("sans-stroke-12", Sans, 12, stroked2),
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("sans-bold-stroke-12", Sans_Bold, 12, stroked3),
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("sans-stroke-13", Sans, 13, stroked2),
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("sans-bold-stroke-13", Sans_Bold, 13, stroked3),
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("sans-stroke-14", Sans, 14, stroked2),
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("sans-bold-stroke-14", Sans_Bold, 14, stroked3),
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("sans-stroke-16", Sans, 16, stroked2),
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)
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for name, (fontnames, loadopts), size, style in fonts:
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print(f"{name}...")
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generate_font(
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f"../../../binaries/data/mods/mod/fonts/{name}", fontnames, loadopts, size, style, dsizes
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)
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