Add failUnsupported messges.
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treeform
parent
67729bc270
commit
0b8df86337
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@ -338,8 +338,8 @@ template eofCheck(buf: string, readTo: int) =
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if readTo > buf.len:
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raise newException(PixieError, "Unexpected error reading font data, EOF")
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template failUnsupported() =
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raise newException(PixieError, "Unsupported font data")
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template failUnsupported(msg: string) =
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raise newException(PixieError, "Unsupported font " & msg)
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proc readUint16Seq(buf: string, offset, len: int): seq[uint16] =
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result = newSeq[uint16](len)
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@ -460,10 +460,10 @@ proc parseHeadTable(buf: string, offset: int): HeadTable =
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result = HeadTable()
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result.majorVersion = buf.readUint16(offset + 0).swap()
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if result.majorVersion != 1:
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failUnsupported()
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failUnsupported("Head major version")
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result.minorVersion = buf.readUint16(offset + 2).swap()
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if result.minorVersion != 0:
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failUnsupported()
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failUnsupported("Head minor version")
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result.fontRevision = buf.readFixed32(offset + 4)
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result.checkSumAdjustment = buf.readUint32(offset + 8).swap()
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result.magicNumber = buf.readUint32(offset + 12).swap()
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@ -481,7 +481,7 @@ proc parseHeadTable(buf: string, offset: int): HeadTable =
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result.indexToLocFormat = buf.readInt16(offset + 50).swap()
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result.glyphDataFormat = buf.readInt16(offset + 52).swap()
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if result.glyphDataFormat != 0:
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failUnsupported()
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failUnsupported("Head glyph data format")
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proc parseHheaTable(buf: string, offset: int): HheaTable =
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buf.eofCheck(offset + 36)
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@ -489,10 +489,10 @@ proc parseHheaTable(buf: string, offset: int): HheaTable =
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result = HheaTable()
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result.majorVersion = buf.readUint16(offset + 0).swap()
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if result.majorVersion != 1:
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failUnsupported()
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failUnsupported("Hhea major version")
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result.minorVersion = buf.readUint16(offset + 2).swap()
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if result.minorVersion != 0:
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failUnsupported()
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failUnsupported("Hhea minor version")
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result.ascender = buf.readInt16(offset + 4).swap()
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result.descender = buf.readInt16(offset + 6).swap()
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result.lineGap = buf.readInt16(offset + 8).swap()
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@ -509,7 +509,7 @@ proc parseHheaTable(buf: string, offset: int): HheaTable =
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# discard buf.readUint16(offset + 30).swap() # Reserved
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result.metricDataFormat = buf.readInt16(offset + 32).swap()
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if result.metricDataFormat != 0:
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failUnsupported()
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failUnsupported("Hhea glyph data format")
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result.numberOfHMetrics = buf.readUint16(offset + 34).swap()
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proc parseMaxpTable(buf: string, offset: int): MaxpTable =
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@ -518,7 +518,7 @@ proc parseMaxpTable(buf: string, offset: int): MaxpTable =
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result = MaxpTable()
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result.version = buf.readFixed32(offset + 0)
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if result.version != 1.0:
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failUnsupported()
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failUnsupported("Maxp version")
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result.numGlyphs = buf.readUint16(offset + 4).swap()
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result.maxPoints = buf.readUint16(offset + 6).swap()
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result.maxContours = buf.readUint16(offset + 8).swap()
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@ -565,7 +565,7 @@ proc parseNameTable(buf: string, offset: int): NameTable =
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result = NameTable()
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result.format = buf.readUint16(i + 0).swap()
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if result.format != 0:
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failUnsupported()
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failUnsupported("Name format")
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result.count = buf.readUint16(i + 2).swap()
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result.stringOffset = buf.readUint16(i + 4).swap()
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@ -694,11 +694,11 @@ proc parseKernTable(buf: string, offset: int): KernTable =
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var subTable: KernSubTable
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subtable.version = buf.readUint16(i + 0).swap()
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if subTable.version != 0:
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failUnsupported()
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failUnsupported("Kern subtable version")
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subTable.length = buf.readUint16(i + 2).swap()
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subTable.coverage = buf.readUint16(i + 4).swap()
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if subTable.coverage shr 8 != 0:
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failUnsupported()
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failUnsupported("Kern subtable coverage")
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subTable.nPairs = buf.readUint16(i + 6).swap()
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subTable.searchRange = buf.readUint16(i + 8).swap()
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subTable.entrySelector = buf.readUint16(i + 10).swap()
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@ -732,7 +732,7 @@ proc parseKernTable(buf: string, offset: int): KernTable =
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elif version == 1:
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discard # Mac format
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else:
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failUnsupported()
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failUnsupported("Kern version")
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# proc parseLangSys(buf: string, offset: int): LangSys =
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# var i = offset
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@ -865,7 +865,7 @@ proc parseCoverage(buf: string, offset: int): Coverage =
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inc ci
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else:
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failUnsupported()
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failUnsupported("coverage format")
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proc valueFormatSize(valueFormat: uint16): int =
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# countSetBits(valueFormat) * 2
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@ -1004,7 +1004,7 @@ proc parseClassDef(buf: string, offset: int): ClassDef =
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result.classRangeRecords[j] = parseClassRangeRecord(buf, i)
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i += 6
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else:
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failUnsupported()
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failUnsupported("class format")
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proc parsePairPos(buf: string, offset: int): PairPos =
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var i = offset
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@ -1045,10 +1045,10 @@ proc parsePairPos(buf: string, offset: int): PairPos =
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case result.coverage.coverageFormat:
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of 1:
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if result.coverage.glyphCount != result.pairSetCount:
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failUnsupported()
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failUnsupported("pair set count")
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for ci, glyphId in result.coverage.glyphArray:
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if ci < 0 or ci >= result.pairSets.len:
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failUnsupported()
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failUnsupported("pair set length")
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for pairValueRecord in result.pairSets[ci].pairValueRecords:
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if pairValueRecord.valueRecord1.xAdvance != 0:
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let glyphPair = (glyphId, pairValueRecord.secondGlyph)
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@ -1059,7 +1059,7 @@ proc parsePairPos(buf: string, offset: int): PairPos =
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var ci = rangeRecord.startCoverageIndex.int
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for glyphId in rangeRecord.startGlyphID .. rangeRecord.endGlyphID:
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if ci < 0 or ci >= result.pairSets.len:
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failUnsupported()
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failUnsupported("pair set length")
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for pairValueRecord in result.pairSets[ci].pairValueRecords:
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if pairValueRecord.valueRecord1.xAdvance != 0:
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let glyphPair = (glyphId, pairValueRecord.secondGlyph)
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@ -1109,7 +1109,7 @@ proc parsePairPos(buf: string, offset: int): PairPos =
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) =
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for record in classDef.classRangeRecords:
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if record.startGlyphID > record.endGlyphID:
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failUnsupported()
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failUnsupported("glyph out of bounds")
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if record.class != 0:
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for glyphId in record.startGlyphID .. record.endGlyphID:
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table[glyphId] = record.class
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@ -1137,7 +1137,7 @@ proc parsePairPos(buf: string, offset: int): PairPos =
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result.classPairAdjustments[(class1.uint16, class2.uint16)] =
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class2Record.valueRecord1.xAdvance
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else:
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failUnsupported()
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failUnsupported("pair pos format")
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proc parseLookup(buf: string, offset: int, pairPosTables: var seq[PairPos]): Lookup =
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var i = offset
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@ -1198,7 +1198,7 @@ proc parseGposTable(buf: string, offset: int): GPOSTable =
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i += 10
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if result.majorVersion != 1:
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failUnsupported()
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failUnsupported("Gpos major version")
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if result.minorVersion == 0:
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discard
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@ -1207,7 +1207,7 @@ proc parseGposTable(buf: string, offset: int): GPOSTable =
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result.featureVariationsOffset = buf.readUint32(i + 0).swap()
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i += 4
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else:
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failUnsupported()
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failUnsupported("Gpos minor version")
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# result.scriptList = parseScriptList(buf, offset + result.scriptListOffset.int)
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# result.featureList =
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@ -1304,7 +1304,7 @@ proc parseGlyphPath(
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i += 2
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prevX += x
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if point >= points.len:
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failUnsupported()
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failUnsupported("point out of bounds")
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points[point].x = prevX.float32
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points[point].isOnCurve = (flag and 1) != 0
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