diff options
Diffstat (limited to 'Lib/fontTools/ttLib/tables/_h_h_e_a.py')
| -rw-r--r-- | Lib/fontTools/ttLib/tables/_h_h_e_a.py | 198 |
1 files changed, 105 insertions, 93 deletions
diff --git a/Lib/fontTools/ttLib/tables/_h_h_e_a.py b/Lib/fontTools/ttLib/tables/_h_h_e_a.py index 9b8baaad..43e464f7 100644 --- a/Lib/fontTools/ttLib/tables/_h_h_e_a.py +++ b/Lib/fontTools/ttLib/tables/_h_h_e_a.py @@ -1,7 +1,9 @@ from fontTools.misc import sstruct from fontTools.misc.textTools import safeEval from fontTools.misc.fixedTools import ( - ensureVersionIsLong as fi2ve, versionToFixed as ve2fi) + ensureVersionIsLong as fi2ve, + versionToFixed as ve2fi, +) from . import DefaultTable import math @@ -29,95 +31,105 @@ hheaFormat = """ class table__h_h_e_a(DefaultTable.DefaultTable): - - # Note: Keep in sync with table__v_h_e_a - - dependencies = ['hmtx', 'glyf', 'CFF ', 'CFF2'] - - # OpenType spec renamed these, add aliases for compatibility - @property - def ascender(self): return self.ascent - - @ascender.setter - def ascender(self,value): self.ascent = value - - @property - def descender(self): return self.descent - - @descender.setter - def descender(self,value): self.descent = value - - def decompile(self, data, ttFont): - sstruct.unpack(hheaFormat, data, self) - - def compile(self, ttFont): - if ttFont.recalcBBoxes and (ttFont.isLoaded('glyf') or ttFont.isLoaded('CFF ') or ttFont.isLoaded('CFF2')): - self.recalc(ttFont) - self.tableVersion = fi2ve(self.tableVersion) - return sstruct.pack(hheaFormat, self) - - def recalc(self, ttFont): - if 'hmtx' in ttFont: - hmtxTable = ttFont['hmtx'] - self.advanceWidthMax = max(adv for adv, _ in hmtxTable.metrics.values()) - - boundsWidthDict = {} - if 'glyf' in ttFont: - glyfTable = ttFont['glyf'] - for name in ttFont.getGlyphOrder(): - g = glyfTable[name] - if g.numberOfContours == 0: - continue - if g.numberOfContours < 0 and not hasattr(g, "xMax"): - # Composite glyph without extents set. - # Calculate those. - g.recalcBounds(glyfTable) - boundsWidthDict[name] = g.xMax - g.xMin - elif 'CFF ' in ttFont or 'CFF2' in ttFont: - if 'CFF ' in ttFont: - topDict = ttFont['CFF '].cff.topDictIndex[0] - else: - topDict = ttFont['CFF2'].cff.topDictIndex[0] - charStrings = topDict.CharStrings - for name in ttFont.getGlyphOrder(): - cs = charStrings[name] - bounds = cs.calcBounds(charStrings) - if bounds is not None: - boundsWidthDict[name] = int( - math.ceil(bounds[2]) - math.floor(bounds[0])) - - if boundsWidthDict: - minLeftSideBearing = float('inf') - minRightSideBearing = float('inf') - xMaxExtent = -float('inf') - for name, boundsWidth in boundsWidthDict.items(): - advanceWidth, lsb = hmtxTable[name] - rsb = advanceWidth - lsb - boundsWidth - extent = lsb + boundsWidth - minLeftSideBearing = min(minLeftSideBearing, lsb) - minRightSideBearing = min(minRightSideBearing, rsb) - xMaxExtent = max(xMaxExtent, extent) - self.minLeftSideBearing = minLeftSideBearing - self.minRightSideBearing = minRightSideBearing - self.xMaxExtent = xMaxExtent - - else: # No glyph has outlines. - self.minLeftSideBearing = 0 - self.minRightSideBearing = 0 - self.xMaxExtent = 0 - - def toXML(self, writer, ttFont): - formatstring, names, fixes = sstruct.getformat(hheaFormat) - for name in names: - value = getattr(self, name) - if name == "tableVersion": - value = fi2ve(value) - value = "0x%08x" % value - writer.simpletag(name, value=value) - writer.newline() - - def fromXML(self, name, attrs, content, ttFont): - if name == "tableVersion": - setattr(self, name, ve2fi(attrs["value"])) - return - setattr(self, name, safeEval(attrs["value"])) + # Note: Keep in sync with table__v_h_e_a + + dependencies = ["hmtx", "glyf", "CFF ", "CFF2"] + + # OpenType spec renamed these, add aliases for compatibility + @property + def ascender(self): + return self.ascent + + @ascender.setter + def ascender(self, value): + self.ascent = value + + @property + def descender(self): + return self.descent + + @descender.setter + def descender(self, value): + self.descent = value + + def decompile(self, data, ttFont): + sstruct.unpack(hheaFormat, data, self) + + def compile(self, ttFont): + if ttFont.recalcBBoxes and ( + ttFont.isLoaded("glyf") + or ttFont.isLoaded("CFF ") + or ttFont.isLoaded("CFF2") + ): + self.recalc(ttFont) + self.tableVersion = fi2ve(self.tableVersion) + return sstruct.pack(hheaFormat, self) + + def recalc(self, ttFont): + if "hmtx" not in ttFont: + return + + hmtxTable = ttFont["hmtx"] + self.advanceWidthMax = max(adv for adv, _ in hmtxTable.metrics.values()) + + boundsWidthDict = {} + if "glyf" in ttFont: + glyfTable = ttFont["glyf"] + for name in ttFont.getGlyphOrder(): + g = glyfTable[name] + if g.numberOfContours == 0: + continue + if g.numberOfContours < 0 and not hasattr(g, "xMax"): + # Composite glyph without extents set. + # Calculate those. + g.recalcBounds(glyfTable) + boundsWidthDict[name] = g.xMax - g.xMin + elif "CFF " in ttFont or "CFF2" in ttFont: + if "CFF " in ttFont: + topDict = ttFont["CFF "].cff.topDictIndex[0] + else: + topDict = ttFont["CFF2"].cff.topDictIndex[0] + charStrings = topDict.CharStrings + for name in ttFont.getGlyphOrder(): + cs = charStrings[name] + bounds = cs.calcBounds(charStrings) + if bounds is not None: + boundsWidthDict[name] = int( + math.ceil(bounds[2]) - math.floor(bounds[0]) + ) + + if boundsWidthDict: + minLeftSideBearing = float("inf") + minRightSideBearing = float("inf") + xMaxExtent = -float("inf") + for name, boundsWidth in boundsWidthDict.items(): + advanceWidth, lsb = hmtxTable[name] + rsb = advanceWidth - lsb - boundsWidth + extent = lsb + boundsWidth + minLeftSideBearing = min(minLeftSideBearing, lsb) + minRightSideBearing = min(minRightSideBearing, rsb) + xMaxExtent = max(xMaxExtent, extent) + self.minLeftSideBearing = minLeftSideBearing + self.minRightSideBearing = minRightSideBearing + self.xMaxExtent = xMaxExtent + + else: # No glyph has outlines. + self.minLeftSideBearing = 0 + self.minRightSideBearing = 0 + self.xMaxExtent = 0 + + def toXML(self, writer, ttFont): + formatstring, names, fixes = sstruct.getformat(hheaFormat) + for name in names: + value = getattr(self, name) + if name == "tableVersion": + value = fi2ve(value) + value = "0x%08x" % value + writer.simpletag(name, value=value) + writer.newline() + + def fromXML(self, name, attrs, content, ttFont): + if name == "tableVersion": + setattr(self, name, ve2fi(attrs["value"])) + return + setattr(self, name, safeEval(attrs["value"])) |