diff options
Diffstat (limited to 'scripts/lib/fontbuild/kerning.py')
| -rw-r--r-- | scripts/lib/fontbuild/kerning.py | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/scripts/lib/fontbuild/kerning.py b/scripts/lib/fontbuild/kerning.py index 816ca1d..302c330 100644 --- a/scripts/lib/fontbuild/kerning.py +++ b/scripts/lib/fontbuild/kerning.py @@ -29,6 +29,7 @@ class KernFeatureWriter(AbstractFeatureWriter): self.kerning = font.kerning self.leftClasses = [] self.rightClasses = [] + self.classSizes = {} def write(self, linesep="\n"): """Write kern feature.""" @@ -42,30 +43,30 @@ class KernFeatureWriter(AbstractFeatureWriter): for rightName, rightContents in self.rightClasses: rightKey = rightContents[0] pair = leftKey, rightKey - if not self.kerning.has_key(pair): + kerningVal = self.kerning[pair] + if kerningVal is None: continue - classPairKerning[leftName, rightName] = self.kerning[pair] + classPairKerning[leftName, rightName] = kerningVal self.kerning.remove(pair) # collect rules with left class and right glyph - for pair, val in self.kerning.getLeft(leftKey): - leftClassKerning[leftName, pair[1]] = self.kerning[pair] + for pair, kerningVal in self.kerning.getLeft(leftKey): + leftClassKerning[leftName, pair[1]] = kerningVal self.kerning.remove(pair) # collect rules with left glyph and right class for rightName, rightContents in self.rightClasses: rightKey = rightContents[0] - for pair, val in self.kerning.getRight(rightKey): - rightClassKerning[pair[0], rightName] = self.kerning[pair] + for pair, kerningVal in self.kerning.getRight(rightKey): + rightClassKerning[pair[0], rightName] = kerningVal self.kerning.remove(pair) # write the feature + self.ruleCount = 0 lines = ["feature kern {"] lines.append(self._writeKerning(self.kerning, linesep)) lines.append(self._writeKerning(leftClassKerning, linesep, True)) - lines.append(" subtable;") lines.append(self._writeKerning(rightClassKerning, linesep, True)) - lines.append(" subtable;") lines.append(self._writeKerning(classPairKerning, linesep)) lines.append("} kern;") return linesep.join(lines) @@ -78,6 +79,15 @@ class KernFeatureWriter(AbstractFeatureWriter): pairs = kerning.items() pairs.sort() for (left, right), val in pairs: + if enum: + rulesAdded = (self.classSizes.get(left, 1) * + self.classSizes.get(right, 1)) + else: + rulesAdded = 1 + self.ruleCount += rulesAdded + if self.ruleCount > 2048: + lines.append(" subtable;") + self.ruleCount = rulesAdded lines.append(" %spos %s %s %d;" % (enum, left, right, val)) return linesep.join(lines) @@ -91,6 +101,7 @@ class KernFeatureWriter(AbstractFeatureWriter): self.leftClasses.append(info) elif name.endswith("_R"): self.rightClasses.append(info) + self.classSizes[name] = len(contents) def makeKernFeature(font, text): |