forked from 0ad/0ad
235 lines
9.0 KiB
Python
235 lines
9.0 KiB
Python
import cairo
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import codecs
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import math
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import FontLoader
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import Packer
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# Representation of a rendered glyph
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class Glyph(object):
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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 not 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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# Force multiple of 4, to avoid leakage across S3TC blocks
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# (TODO: is this useful?)
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#self.w += (4 - (self.w % 4)) % 4
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#self.h += (4 - (self.h % 4)) % 4
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def pack(self, packer):
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self.pos = packer.Pack(self.w, self.h)
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def render(self, ctx):
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if not 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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f = codecs.open(filename, "r", "utf-8")
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chars = f.read()
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f.close()
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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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format = (cairo.FORMAT_ARGB32 if "colour" in renderstyle else cairo.FORMAT_A8)
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surface = cairo.ImageSurface(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, ttfNames, loadopts, size, renderstyle, dsizes):
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faceList = []
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indexList = []
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for i in range(len(ttfNames)):
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(face, indices) = FontLoader.create_cairo_font_face_for_file("../../../binaries/data/tools/fontbuilder/fonts/%s" % ttfNames[i], 0, loadopts)
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faceList.append(face)
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if not ttfNames[i] in dsizes:
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dsizes[ttfNames[i]] = 0
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indexList.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(faceList[0]);
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ctx.set_font_size(size + dsizes[ttfNames[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([(indexList[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(indexList)):
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idx = indexList[i](unichr(c))
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if c == 0xFFFD and idx == 0: # use "?" if the missing-glyph glyph is missing
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idx = indexList[i]("?")
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if idx:
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glyphs.append(Glyph(ctx, renderstyle, unichr(c), idx, faceList[i], size + dsizes[ttfNames[i]]))
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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(key = lambda (w, h): (w*h, max(w, h))) # 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 = Packer.DumbRectanglePacker(w, h)
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#packer = Packer.CygonRectanglePacker(w, h)
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for g in glyphs:
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g.pack(packer)
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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("%s.png" % outname)
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# Output the .fnt file with all the glyph positions etc
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fnt = open("%s.fnt" % outname, "w")
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fnt.write("101\n")
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fnt.write("%d %d\n" % (w, h))
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fnt.write("%s\n" % ("rgba" if "colour" in renderstyle else "a"))
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fnt.write("%d\n" % len(glyphs))
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fnt.write("%d\n" % linespacing)
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fnt.write("%d\n" % charheight)
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# sorting unneeded, as glyphs are added in increasing order
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#glyphs.sort(key = lambda g: ord(g.char))
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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 http://trac.wildfiregames.com/ticket/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("%d %d %d %d %d %d %d %d\n" % (ord(g.char), g.pos.x, h-g.pos.y, g.w, g.h, -x0, y0, g.xadvance))
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fnt.close()
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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 = { "colour": True, "stroke": [((0, 0, 0, 1), 2.0), ((0, 0, 0, 1), 2.0)], "fill": [(1, 1, 1, 1)] }
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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"], FontLoader.FT_LOAD_DEFAULT)
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Sans_Bold = (["LinBiolinum_RBah.ttf","FreeSansBold.ttf"], FontLoader.FT_LOAD_DEFAULT)
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Sans_Italic = (["LinBiolinum_RIah.ttf","FreeSansOblique.ttf"], FontLoader.FT_LOAD_DEFAULT)
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SansMono = (["DejaVuSansMono.ttf","FreeMono.ttf"], FontLoader.FT_LOAD_DEFAULT)
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Serif = (["texgyrepagella-regular.otf","FreeSerif.ttf"], FontLoader.FT_LOAD_NO_HINTING)
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Serif_Bold = (["texgyrepagella-bold.otf","FreeSerifBold.ttf"], FontLoader.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 "%s..." % name
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generate_font("../../../binaries/data/mods/mod/fonts/%s" % name, fontnames, loadopts, size, style, dsizes)
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