Merge pull request #2161 from fonttools/fix-woff2-offcurve-overlap-flag
WOFF2: An off-curve should stay off even with flags
This commit is contained in:
Nikolaus Waxweiler
GitHub
commit
c4027c0e67
@ -11,7 +11,7 @@ from fontTools.ttLib import (TTFont, TTLibError, getTableModule, getTableClass,
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from fontTools.ttLib.sfnt import (SFNTReader, SFNTWriter, DirectoryEntry,
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WOFFFlavorData, sfntDirectoryFormat, sfntDirectorySize, SFNTDirectoryEntry,
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sfntDirectoryEntrySize, calcChecksum)
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from fontTools.ttLib.tables import ttProgram
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from fontTools.ttLib.tables import ttProgram, _g_l_y_f
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import logging
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@ -934,7 +934,7 @@ class WOFF2GlyfTable(getTableClass('glyf')):
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flags = array.array('B')
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triplets = array.array('B')
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for i in range(len(coordinates)):
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onCurve = glyph.flags[i]
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onCurve = glyph.flags[i] & _g_l_y_f.flagOnCurve
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x, y = coordinates[i]
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absX = abs(x)
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absY = abs(y)
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3
NEWS.rst
3
NEWS.rst
@ -1,3 +1,6 @@
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- [woff2] An initial off-curve point with an overlap flag now stays an off-curve
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point after compression.
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4.19.0 (released 2021-01-25)
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----------------------------
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306
Tests/ttLib/data/woff2_overlap_offcurve_in.ttx
Normal file
306
Tests/ttLib/data/woff2_overlap_offcurve_in.ttx
Normal file
@ -0,0 +1,306 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<ttFont sfntVersion="\x00\x01\x00\x00" ttLibVersion="4.18">
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<GlyphOrder>
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<!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
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<GlyphID id="0" name=".notdef"/>
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<GlyphID id="1" name="A"/>
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</GlyphOrder>
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<head>
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<!-- Most of this table will be recalculated by the compiler -->
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<tableVersion value="1.0"/>
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<fontRevision value="1.0"/>
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<checkSumAdjustment value="0x9aec19bb"/>
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<magicNumber value="0x5f0f3cf5"/>
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<flags value="00000000 00000010"/>
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<unitsPerEm value="1000"/>
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<created value="Thu Jan 28 15:17:57 2021"/>
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<modified value="Thu Jan 28 15:52:10 2021"/>
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<xMin value="178"/>
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<yMin value="72"/>
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<xMax value="586"/>
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<yMax value="480"/>
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<macStyle value="00000000 00000000"/>
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<lowestRecPPEM value="6"/>
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<fontDirectionHint value="2"/>
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<indexToLocFormat value="0"/>
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<glyphDataFormat value="0"/>
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</head>
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<hhea>
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<tableVersion value="0x00010000"/>
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<ascent value="750"/>
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<descent value="-250"/>
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<lineGap value="100"/>
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<advanceWidthMax value="639"/>
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<minLeftSideBearing value="178"/>
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<minRightSideBearing value="53"/>
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<xMaxExtent value="586"/>
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<caretSlopeRise value="1"/>
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<caretSlopeRun value="0"/>
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<caretOffset value="0"/>
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<reserved0 value="0"/>
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<reserved1 value="0"/>
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<reserved2 value="0"/>
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<reserved3 value="0"/>
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<metricDataFormat value="0"/>
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<numberOfHMetrics value="2"/>
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</hhea>
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<maxp>
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<!-- Most of this table will be recalculated by the compiler -->
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<tableVersion value="0x10000"/>
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<numGlyphs value="2"/>
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<maxPoints value="20"/>
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<maxContours value="1"/>
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<maxCompositePoints value="0"/>
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<maxCompositeContours value="0"/>
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<maxZones value="1"/>
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<maxTwilightPoints value="0"/>
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<maxStorage value="0"/>
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<maxFunctionDefs value="0"/>
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<maxInstructionDefs value="0"/>
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<maxStackElements value="0"/>
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<maxSizeOfInstructions value="0"/>
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<maxComponentElements value="0"/>
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<maxComponentDepth value="0"/>
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</maxp>
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<OS_2>
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<!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
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will be recalculated by the compiler -->
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<version value="4"/>
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<xAvgCharWidth value="445"/>
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<usWeightClass value="400"/>
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<usWidthClass value="5"/>
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<fsType value="00000000 00000100"/>
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<ySubscriptXSize value="650"/>
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<ySubscriptYSize value="600"/>
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<ySubscriptXOffset value="0"/>
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<ySubscriptYOffset value="75"/>
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<ySuperscriptXSize value="650"/>
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<ySuperscriptYSize value="600"/>
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<ySuperscriptXOffset value="0"/>
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<ySuperscriptYOffset value="350"/>
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<yStrikeoutSize value="50"/>
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<yStrikeoutPosition value="300"/>
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<sFamilyClass value="0"/>
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<panose>
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<bFamilyType value="0"/>
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<bSerifStyle value="0"/>
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<bWeight value="0"/>
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<bProportion value="0"/>
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<bContrast value="0"/>
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<bStrokeVariation value="0"/>
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<bArmStyle value="0"/>
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<bLetterForm value="0"/>
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<bMidline value="0"/>
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<bXHeight value="0"/>
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</panose>
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<ulUnicodeRange1 value="00000000 00000000 00000000 00000001"/>
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<ulUnicodeRange2 value="00000000 00000000 00000000 00000000"/>
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<ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
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<ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
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<achVendID value="NONE"/>
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<fsSelection value="00000000 11000000"/>
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<usFirstCharIndex value="65"/>
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<usLastCharIndex value="65"/>
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<sTypoAscender value="750"/>
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<sTypoDescender value="-250"/>
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<sTypoLineGap value="100"/>
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<usWinAscent value="750"/>
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<usWinDescent value="250"/>
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<ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
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<ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
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<sxHeight value="500"/>
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<sCapHeight value="700"/>
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<usDefaultChar value="0"/>
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<usBreakChar value="32"/>
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<usMaxContext value="0"/>
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</OS_2>
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<hmtx>
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<mtx name=".notdef" width="250" lsb="0"/>
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<mtx name="A" width="639" lsb="178"/>
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</hmtx>
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<cmap>
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<tableVersion version="0"/>
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<cmap_format_4 platformID="0" platEncID="3" language="0">
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<map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
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</cmap_format_4>
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<cmap_format_4 platformID="3" platEncID="1" language="0">
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<map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
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</cmap_format_4>
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</cmap>
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<loca>
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<!-- The 'loca' table will be calculated by the compiler -->
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</loca>
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<glyf>
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<!-- The xMin, yMin, xMax and yMax values
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will be recalculated by the compiler. -->
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<TTGlyph name=".notdef"/><!-- contains no outline data -->
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<TTGlyph name="A" xMin="178" yMin="72" xMax="586" yMax="480">
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<contour>
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<pt x="382" y="72" on="0" overlap="1"/>
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<pt x="336" y="72" on="1"/>
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<pt x="261" y="101" on="0"/>
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<pt x="207" y="155" on="0"/>
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<pt x="178" y="230" on="0"/>
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<pt x="178" y="276" on="1"/>
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<pt x="178" y="322" on="0"/>
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<pt x="207" y="397" on="0"/>
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<pt x="261" y="451" on="0"/>
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<pt x="336" y="480" on="0"/>
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<pt x="382" y="480" on="1"/>
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<pt x="428" y="480" on="0"/>
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<pt x="503" y="451" on="0"/>
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<pt x="557" y="397" on="0"/>
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<pt x="586" y="322" on="0"/>
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<pt x="586" y="276" on="1"/>
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<pt x="586" y="230" on="0"/>
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<pt x="557" y="155" on="0"/>
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<pt x="503" y="101" on="0"/>
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<pt x="428" y="72" on="0"/>
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</contour>
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<instructions/>
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</TTGlyph>
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</glyf>
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<name>
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<namerecord nameID="256" platformID="1" platEncID="0" langID="0x0" unicode="True">
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Weight
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</namerecord>
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<namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
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Unnamed
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</namerecord>
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<namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
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Regular
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</namerecord>
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<namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
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1.000;NONE;Unnamed-Regular
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</namerecord>
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<namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
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Unnamed Regular
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</namerecord>
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<namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
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Version 1.000
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</namerecord>
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<namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
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Unnamed-Regular
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</namerecord>
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<namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
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Weight
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</namerecord>
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</name>
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<post>
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<formatType value="2.0"/>
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<italicAngle value="0.0"/>
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<underlinePosition value="-100"/>
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<underlineThickness value="50"/>
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<isFixedPitch value="0"/>
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<minMemType42 value="0"/>
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<maxMemType42 value="0"/>
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<minMemType1 value="0"/>
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<maxMemType1 value="0"/>
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<psNames>
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<!-- This file uses unique glyph names based on the information
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found in the 'post' table. Since these names might not be unique,
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we have to invent artificial names in case of clashes. In order to
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be able to retain the original information, we need a name to
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ps name mapping for those cases where they differ. That's what
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you see below.
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-->
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</psNames>
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<extraNames>
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<!-- following are the name that are not taken from the standard Mac glyph order -->
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</extraNames>
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</post>
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<gasp>
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<gaspRange rangeMaxPPEM="65535" rangeGaspBehavior="15"/>
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</gasp>
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<HVAR>
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<Version value="0x00010000"/>
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<VarStore Format="1">
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<Format value="1"/>
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<VarRegionList>
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<!-- RegionAxisCount=1 -->
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<!-- RegionCount=1 -->
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<Region index="0">
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<VarRegionAxis index="0">
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<StartCoord value="0.0"/>
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<PeakCoord value="1.0"/>
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<EndCoord value="1.0"/>
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</VarRegionAxis>
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</Region>
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</VarRegionList>
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<!-- VarDataCount=1 -->
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<VarData index="0">
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<!-- ItemCount=2 -->
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<NumShorts value="0"/>
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<!-- VarRegionCount=0 -->
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<Item index="0" value="[]"/>
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<Item index="1" value="[]"/>
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</VarData>
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</VarStore>
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</HVAR>
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<STAT>
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<Version value="0x00010001"/>
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<DesignAxisRecordSize value="8"/>
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<!-- DesignAxisCount=1 -->
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<DesignAxisRecord>
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<Axis index="0">
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<AxisTag value="wght"/>
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<AxisNameID value="256"/> <!-- Weight -->
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<AxisOrdering value="0"/>
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</Axis>
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</DesignAxisRecord>
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<!-- AxisValueCount=0 -->
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<ElidedFallbackNameID value="2"/> <!-- Regular -->
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</STAT>
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<fvar>
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<!-- Weight -->
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<Axis>
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<AxisTag>wght</AxisTag>
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<Flags>0x0</Flags>
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<MinValue>400.0</MinValue>
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<DefaultValue>400.0</DefaultValue>
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<MaxValue>700.0</MaxValue>
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<AxisNameID>256</AxisNameID>
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</Axis>
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</fvar>
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<gvar>
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<version value="1"/>
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<reserved value="0"/>
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<glyphVariations glyph="A">
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<tuple>
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<coord axis="wght" value="1.0"/>
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<delta pt="0" x="-64" y="-44"/>
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<delta pt="5" x="-138" y="30"/>
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<delta pt="7" x="-127" y="73"/>
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<delta pt="8" x="-108" y="92"/>
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<delta pt="10" x="-64" y="103"/>
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<delta pt="12" x="-21" y="92"/>
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<delta pt="13" x="-2" y="73"/>
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<delta pt="16" x="9" y="13"/>
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<delta pt="17" x="-2" y="-14"/>
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<delta pt="18" x="-21" y="-33"/>
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</tuple>
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</glyphVariations>
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</gvar>
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</ttFont>
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@ -1,6 +1,7 @@
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from fontTools.misc.py23 import *
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from fontTools import ttLib
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from fontTools.ttLib import woff2
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from fontTools.ttLib.tables import _g_l_y_f
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from fontTools.ttLib.woff2 import (
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WOFF2Reader, woff2DirectorySize, woff2DirectoryFormat,
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woff2FlagsSize, woff2UnknownTagSize, woff2Base128MaxSize, WOFF2DirectoryEntry,
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@ -1220,6 +1221,20 @@ class WOFF2RoundtripTest(object):
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assert tmp.getvalue() == tmp2.getvalue()
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assert ttFont.flavor == "woff2"
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def test_roundtrip_off_curve_despite_overlap_bit(self):
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ttx = os.path.join(data_dir, "woff2_overlap_offcurve_in.ttx")
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ttFont = ttLib.TTFont()
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ttFont.importXML(ttx)
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assert ttFont["glyf"]["A"].flags[0] == _g_l_y_f.flagOverlapSimple
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ttFont.flavor = "woff2"
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tmp = BytesIO()
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ttFont.save(tmp)
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_, ttFont2 = self.roundtrip(tmp)
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assert ttFont2.flavor == "woff2"
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assert ttFont2["glyf"]["A"].flags[0] == 0
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class MainTest(object):
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