Initial public commit

misc/pylib/fontbuild/generateGlyph.py

@@ -0,0 +1,97 @@
+# Copyright 2015 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import re
+from string import find
+
+from anchors import alignComponentsToAnchors, getAnchorByName
+
+
+def parseComposite(composite):
+    c = composite.split("=")
+    d = c[1].split("/")
+    glyphName = d[0]
+    if len(d) == 1:
+        offset = [0, 0]
+    else:
+        offset = [int(i) for i in d[1].split(",")]
+    accentString = c[0]
+    accents = accentString.split("+")
+    baseName = accents.pop(0)
+    accentNames = [i.split(":") for i in accents]
+    return (glyphName, baseName, accentNames, offset)
+
+
+def copyMarkAnchors(f, g, srcname, width):
+    for anchor in f[srcname].anchors:
+        if anchor.name in ("top_dd", "bottom_dd", "top0315"):
+            g.appendAnchor(anchor.name, (anchor.x + width, anchor.y))
+
+        if ("top" == anchor.name and
+            not any(a.name == "parent_top" for a in g.anchors)):
+            g.appendAnchor("parent_top", anchor.position)
+
+        if ("bottom" == anchor.name and
+            not any(a.name == "bottom" for a in g.anchors)):
+            g.appendAnchor("bottom", anchor.position)
+
+    if any(a.name == "top" for a in g.anchors):
+        return
+
+    anchor_parent_top = getAnchorByName(g, "parent_top")
+    if anchor_parent_top is not None:
+        g.appendAnchor("top", anchor_parent_top.position)
+
+
+def generateGlyph(f,gname,glyphList={}):
+    glyphName, baseName, accentNames, offset = parseComposite(gname)
+    if f.has_key(glyphName):
+        print('Existing glyph "%s" found in font, ignoring composition rule '
+              '"%s"' % (glyphName, gname))
+        return
+
+    if baseName.find("_") != -1:
+        g = f.newGlyph(glyphName)
+        for componentName in baseName.split("_"):
+            g.appendComponent(componentName, (g.width, 0))
+            g.width += f[componentName].width
+            setUnicodeValue(g, glyphList)
+
+    else:
+        try:
+            f.compileGlyph(glyphName, baseName, accentNames)
+        except KeyError as e:
+            print('KeyError raised for composition rule "%s", likely "%s" '
+                  'anchor not found in glyph "%s"' % (gname, e, baseName))
+            return
+        g = f[glyphName]
+        setUnicodeValue(g, glyphList)
+        copyMarkAnchors(f, g, baseName, offset[1] + offset[0])
+        if len(accentNames) > 0:
+            alignComponentsToAnchors(f, glyphName, baseName, accentNames)
+        if offset[0] != 0 or offset[1] != 0:
+            g.width += offset[1] + offset[0]
+            g.move((offset[0], 0), anchors=False)
+
+
+def setUnicodeValue(glyph, glyphList):
+    """Try to ensure glyph has a unicode value -- used by FDK to make OTFs."""
+
+    if glyph.name in glyphList:
+        glyph.unicode = int(glyphList[glyph.name], 16)
+    else:
+        uvNameMatch = re.match("uni([\dA-F]{4})$", glyph.name)
+        if uvNameMatch:
+            glyph.unicode = int(uvNameMatch.group(1), 16)