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