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aat_common_test.go
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package tables
import (
"reflect"
"strings"
"testing"
td "github.com/benoitkugler/go-opentype-testdata/opentype"
tu "github.com/benoitkugler/go-opentype/testutils"
)
func TestAATLookup4(t *testing.T) {
// adapted from fontttools
src := deHexStr(
"0004 0006 0003 000C 0001 0006 " +
"0002 0001 001E " + // glyph 1..2: mapping at offset 0x1E
"0005 0004 001E " + // glyph 4..5: mapping at offset 0x1E
"FFFF FFFF FFFF " + // end of search table
"0007 0008")
class, _, err := ParseAATLookup(src, 4)
tu.AssertNoErr(t, err)
gids := []GlyphID{1, 2, 4, 5}
classes := []uint16{7, 8, 7, 8}
for i, gid := range gids {
c, ok := class.Class(gid)
tu.Assert(t, ok)
tu.Assert(t, c == classes[i])
}
_, found := class.Class(0xFF)
tu.Assert(t, !found)
// extracted from macos Tamil MN font
src = []byte{0, 4, 0, 6, 0, 5, 0, 24, 0, 2, 0, 6, 0, 151, 0, 129, 0, 42, 0, 156, 0, 153, 0, 88, 0, 163, 0, 163, 0, 96, 1, 48, 1, 48, 0, 98, 255, 255, 255, 255, 0, 100, 0, 4, 0, 10, 0, 11, 0, 12, 0, 13, 0, 14, 0, 15, 0, 16, 0, 17, 0, 18, 0, 19, 0, 20, 0, 21, 0, 22, 0, 23, 0, 24, 0, 25, 0, 26, 0, 27, 0, 28, 0, 29, 0, 30, 0, 31, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9, 0, 32}
class, _, err = ParseAATLookup(src, 0xFFFF)
tu.AssertNoErr(t, err)
gids = []GlyphID{132, 129, 144, 145, 146, 140, 137, 130, 135, 138, 133, 139, 142, 143, 136, 134, 147, 141, 151, 132, 150, 148, 149, 304, 153, 154, 163, 155, 156}
classes = []uint16{
12, 4, 24, 25, 26, 20, 17, 10, 15, 18, 13, 19, 22, 23, 16, 14, 27, 21, 31, 12, 30, 28, 29, 32, 5, 6, 9, 7, 8,
}
for i, gid := range gids {
c, ok := class.Class(gid)
tu.Assert(t, ok)
tu.Assert(t, c == classes[i])
}
_, found = class.Class(0xFF)
tu.Assert(t, !found)
}
func TestParseTrak(t *testing.T) {
fp := readFontFile(t, "toys/Trak.ttf")
trak, _, err := ParseTrak(readTable(t, fp, "trak"))
tu.AssertNoErr(t, err)
tu.Assert(t, len(trak.Horiz.SizeTable) == 4)
tu.Assert(t, len(trak.Vert.SizeTable) == 0)
tu.Assert(t, reflect.DeepEqual(trak.Horiz.SizeTable, []float32{1, 2, 12, 96}))
tu.Assert(t, reflect.DeepEqual(trak.Horiz.TrackTable[0].PerSizeTracking, []int16{200, 200, 0, -100}))
}
func TestParseFeat(t *testing.T) {
fp := readFontFile(t, "toys/Feat.ttf")
feat, _, err := ParseFeat(readTable(t, fp, "feat"))
tu.AssertNoErr(t, err)
expectedSettings := [...][]FeatureSettingName{
{{2, 260}, {4, 259}, {10, 304}},
{{0, 309}, {1, 263}, {3, 264}},
{{0, 266}, {1, 267}},
{{0, 271}, {2, 272}, {8, 273}},
{{0, 309}, {1, 275}, {2, 277}, {3, 278}},
{{0, 309}, {2, 280}},
{{0, 283}},
{{8, 308}},
{{0, 309}, {3, 289}},
{{0, 294}, {1, 295}, {2, 296}, {3, 297}},
{{0, 309}, {1, 301}},
}
tu.Assert(t, len(feat.Names) == len(expectedSettings))
for i, name := range feat.Names {
exp := expectedSettings[i]
got := name.SettingTable
tu.Assert(t, reflect.DeepEqual(exp, got))
}
}
func TestParseAnkr(t *testing.T) {
table, err := td.Files.ReadFile("toys/tables/ankr.bin")
tu.AssertNoErr(t, err)
ankr, _, err := ParseAnkr(table, 1409)
tu.AssertNoErr(t, err)
_, isFormat4 := ankr.lookupTable.(AATLoopkup4)
tu.Assert(t, isFormat4)
}
func TestParseMorx(t *testing.T) {
files := tu.Filenames(t, "morx")
files = append(files, "toys/Trak.ttf")
for _, filename := range files {
fp := readFontFile(t, filename)
ng := numGlyphs(t, fp)
table, _, err := ParseMorx(readTable(t, fp, "morx"), ng)
tu.AssertNoErr(t, err)
tu.Assert(t, int(table.nChains) == len(table.Chains))
tu.Assert(t, int(table.nChains) == 1)
for _, chain := range table.Chains {
tu.AssertNoErr(t, err)
tu.Assert(t, len(chain.Subtables) == int(chain.nSubtable))
tu.Assert(t, chain.Flags == 1)
}
}
}
func TestMorxLigature(t *testing.T) {
// imported from fonttools
// Taken from “Example 2: A ligature table” in
// https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6morx.html
// as retrieved on 2017-09-11.
//
// Compared to the example table in Apple’s specification, we’ve
// made the following changes:
//
// * at offsets 0..35, we’ve prepended 36 bytes of boilerplate
// to make the data a structurally valid ‘morx’ table;
//
// * at offsets 88..91 (offsets 52..55 in Apple’s document), we’ve
// changed the range of the third segment from 23..24 to 26..28.
// The hexdump values in Apple’s specification are completely wrong;
// the values from the comments would work, but they can be encoded
// more compactly than in the specification example. For round-trip
// testing, we omit the ‘f’ glyph, which makes AAT lookup format 2
// the most compact encoding;
//
// * at offsets 92..93 (offsets 56..57 in Apple’s document), we’ve
// changed the glyph class of the third segment from 5 to 6, which
// matches the values from the comments to the spec (but not the
// Apple’s hexdump).
morxLigatureData := deHexStr(
"0002 0000 " + // 0: Version=2, Reserved=0
"0000 0001 " + // 4: MorphChainCount=1
"0000 0001 " + // 8: DefaultFlags=1
"0000 00DA " + // 12: StructLength=218 (+8=226)
"0000 0000 " + // 16: MorphFeatureCount=0
"0000 0001 " + // 20: MorphSubtableCount=1
"0000 00CA " + // 24: Subtable[0].StructLength=202 (+24=226)
"80 " + // 28: Subtable[0].CoverageFlags=0x80
"00 00 " + // 29: Subtable[0].Reserved=0
"02 " + // 31: Subtable[0].MorphType=2/LigatureMorph
"0000 0001 " + // 32: Subtable[0].SubFeatureFlags=0x1
// State table header.
"0000 0007 " + // 36: STXHeader.ClassCount=7
"0000 001C " + // 40: STXHeader.ClassTableOffset=28 (+36=64)
"0000 0040 " + // 44: STXHeader.StateArrayOffset=64 (+36=100)
"0000 0078 " + // 48: STXHeader.EntryTableOffset=120 (+36=156)
"0000 0090 " + // 52: STXHeader.LigActionsOffset=144 (+36=180)
"0000 009C " + // 56: STXHeader.LigComponentsOffset=156 (+36=192)
"0000 00AE " + // 60: STXHeader.LigListOffset=174 (+36=210)
// Glyph class table.
"0002 0006 " + // 64: ClassTable.LookupFormat=2, .UnitSize=6
"0003 000C " + // 68: .NUnits=3, .SearchRange=12
"0001 0006 " + // 72: .EntrySelector=1, .RangeShift=6
"0016 0014 0004 " + // 76: GlyphID 20..22 [a..c] -> GlyphClass 4
"0018 0017 0005 " + // 82: GlyphID 23..24 [d..e] -> GlyphClass 5
"001C 001A 0006 " + // 88: GlyphID 26..28 [g..i] -> GlyphClass 6
"FFFF FFFF 0000 " + // 94: <end of lookup>
// State array.
"0000 0000 0000 0000 0001 0000 0000 " + // 100: State[0][0..6]
"0000 0000 0000 0000 0001 0000 0000 " + // 114: State[1][0..6]
"0000 0000 0000 0000 0001 0002 0000 " + // 128: State[2][0..6]
"0000 0000 0000 0000 0001 0002 0003 " + // 142: State[3][0..6]
// Entry table.
"0000 0000 " + // 156: Entries[0].NewState=0, .Flags=0
"0000 " + // 160: Entries[0].ActionIndex=<n/a> because no 0x2000 flag
"0002 8000 " + // 162: Entries[1].NewState=2, .Flags=0x8000 (SetComponent)
"0000 " + // 166: Entries[1].ActionIndex=<n/a> because no 0x2000 flag
"0003 8000 " + // 168: Entries[2].NewState=3, .Flags=0x8000 (SetComponent)
"0000 " + // 172: Entries[2].ActionIndex=<n/a> because no 0x2000 flag
"0000 A000 " + // 174: Entries[3].NewState=0, .Flags=0xA000 (SetComponent,Act)
"0000 " + // 178: Entries[3].ActionIndex=0 (start at Action[0])
// Ligature actions table.
"3FFF FFE7 " + // 180: Action[0].Flags=0, .GlyphIndexDelta=-25
"3FFF FFED " + // 184: Action[1].Flags=0, .GlyphIndexDelta=-19
"BFFF FFF2 " + // 188: Action[2].Flags=<end of list>, .GlyphIndexDelta=-14
// Ligature component table.
"0000 0001 " + // 192: LigComponent[0]=0, LigComponent[1]=1
"0002 0003 " + // 196: LigComponent[2]=2, LigComponent[3]=3
"0000 0004 " + // 200: LigComponent[4]=0, LigComponent[5]=4
"0000 0008 " + // 204: LigComponent[6]=0, LigComponent[7]=8
"0010 " + // 208: LigComponent[8]=16
// Ligature list.
"03E8 03E9 " + // 210: LigList[0]=1000, LigList[1]=1001
"03EA 03EB " + // 214: LigList[2]=1002, LigList[3]=1003
"03EC 03ED " + // 218: LigList[4]=1004, LigList[3]=1005
"03EE 03EF ") // 222: LigList[5]=1006, LigList[6]=1007
tu.Assert(t, len(morxLigatureData) == 226)
out, _, err := ParseMorx(morxLigatureData, 1515)
tu.AssertNoErr(t, err)
tu.Assert(t, len(out.Chains) == 1)
chain := out.Chains[0]
tu.Assert(t, chain.Flags == 1)
tu.Assert(t, len(chain.Subtables) == 1)
subtable := chain.Subtables[0]
const vertical uint8 = 0x80
tu.Assert(t, subtable.Coverage == vertical)
tu.Assert(t, subtable.SubFeatureFlags == 1)
lig, ok := subtable.Data.(MorxSubtableLigature)
tu.Assert(t, ok)
machine := lig.AATStateTableExt
tu.Assert(t, machine.StateSize == 7)
class, ok := machine.Class.(AATLoopkup2)
tu.Assert(t, ok)
expMachineClassRecords := []LookupRecord2{
{FirstGlyph: 20, LastGlyph: 22, Value: 4},
{FirstGlyph: 23, LastGlyph: 24, Value: 5},
{FirstGlyph: 26, LastGlyph: 28, Value: 6},
}
tu.Assert(t, reflect.DeepEqual(class.Records, expMachineClassRecords))
expMachineStates := [][]uint16{
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0000, 0x0000}, // State[0][0..6]
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0000, 0x0000}, // State[1][0..6]
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0002, 0x0000}, // State[2][0..6]
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0002, 0x0003}, // State[3][0..6]
}
tu.Assert(t, reflect.DeepEqual(machine.States, expMachineStates))
expMachineEntries := []AATStateEntry{
{NewState: 0, Flags: 0},
{NewState: 0x0002, Flags: 0x8000},
{NewState: 0x0003, Flags: 0x8000},
{NewState: 0, Flags: 0xA000},
}
tu.Assert(t, reflect.DeepEqual(machine.Entries, expMachineEntries))
expLigActions := []uint32{
0x3FFFFFE7,
0x3FFFFFED,
0xBFFFFFF2,
}
expComponents := []uint16{0, 1, 2, 3, 0, 4, 0, 8, 16}
expLigatures := []GlyphID{
1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007,
}
tu.Assert(t, reflect.DeepEqual(lig.LigActions, expLigActions))
tu.Assert(t, reflect.DeepEqual(lig.Components, expComponents))
tu.Assert(t, reflect.DeepEqual(lig.Ligatures, expLigatures))
}
func TestMorxInsertion(t *testing.T) {
// imported from fonttools
// Taken from the `morx` table of the second font in DevanagariSangamMN.ttc
// on macOS X 10.12.6; manually pruned to just contain the insertion lookup.
morxInsertionData := deHexStr(
"0002 0000 " + // 0: Version=2, Reserved=0
"0000 0001 " + // 4: MorphChainCount=1
"0000 0001 " + // 8: DefaultFlags=1
"0000 00A4 " + // 12: StructLength=164 (+8=172)
"0000 0000 " + // 16: MorphFeatureCount=0
"0000 0001 " + // 20: MorphSubtableCount=1
"0000 0094 " + // 24: Subtable[0].StructLength=148 (+24=172)
"00 " + // 28: Subtable[0].CoverageFlags=0x00
"00 00 " + // 29: Subtable[0].Reserved=0
"05 " + // 31: Subtable[0].MorphType=5/InsertionMorph
"0000 0001 " + // 32: Subtable[0].SubFeatureFlags=0x1
"0000 0006 " + // 36: STXHeader.ClassCount=6
"0000 0014 " + // 40: STXHeader.ClassTableOffset=20 (+36=56)
"0000 004A " + // 44: STXHeader.StateArrayOffset=74 (+36=110)
"0000 006E " + // 48: STXHeader.EntryTableOffset=110 (+36=146)
"0000 0086 " + // 52: STXHeader.InsertionActionOffset=134 (+36=170)
// Glyph class table.
"0002 0006 " + // 56: ClassTable.LookupFormat=2, .UnitSize=6
"0006 0018 " + // 60: .NUnits=6, .SearchRange=24
"0002 000C " + // 64: .EntrySelector=2, .RangeShift=12
"00AC 00AC 0005 " + // 68: GlyphID 172..172 -> GlyphClass 5
"01EB 01E6 0005 " + // 74: GlyphID 486..491 -> GlyphClass 5
"01F0 01F0 0004 " + // 80: GlyphID 496..496 -> GlyphClass 4
"01F8 01F6 0004 " + // 88: GlyphID 502..504 -> GlyphClass 4
"01FC 01FA 0004 " + // 92: GlyphID 506..508 -> GlyphClass 4
"0250 0250 0005 " + // 98: GlyphID 592..592 -> GlyphClass 5
"FFFF FFFF 0000 " + // 104: <end of lookup>
// State array.
"0000 0000 0000 0000 0001 0000 " + // 110: State[0][0..5]
"0000 0000 0000 0000 0001 0000 " + // 122: State[1][0..5]
"0000 0000 0001 0000 0001 0002 " + // 134: State[2][0..5]
// Entry table.
"0000 0000 " + // 146: Entries[0].NewState=0, .Flags=0
"FFFF " + // 150: Entries[0].CurrentInsertIndex=<None>
"FFFF " + // 152: Entries[0].MarkedInsertIndex=<None>
"0002 0000 " + // 154: Entries[1].NewState=0, .Flags=0
"FFFF " + // 158: Entries[1].CurrentInsertIndex=<None>
"FFFF " + // 160: Entries[1].MarkedInsertIndex=<None>
"0000 " + // 162: Entries[2].NewState=0
"2820 " + // 164: .Flags=CurrentIsKashidaLike,CurrentInsertBefore
// .CurrentInsertCount=1, .MarkedInsertCount=0
"0000 " + // 166: Entries[1].CurrentInsertIndex=0
"FFFF " + // 168: Entries[1].MarkedInsertIndex=<None>
// Insertion action table.
"022F") // 170: InsertionActionTable[0]=GlyphID 559
tu.Assert(t, len(morxInsertionData) == 172)
out, _, err := ParseMorx(morxInsertionData, 910)
tu.AssertNoErr(t, err)
tu.Assert(t, len(out.Chains) == 1)
chain := out.Chains[0]
tu.Assert(t, chain.Flags == 1)
tu.Assert(t, len(chain.Subtables) == 1)
subtable := chain.Subtables[0]
const vertical uint8 = 0
tu.Assert(t, subtable.Coverage == vertical)
tu.Assert(t, subtable.SubFeatureFlags == 1)
insert, ok := subtable.Data.(MorxSubtableInsertion)
tu.Assert(t, ok)
machine := insert.AATStateTableExt
tu.Assert(t, machine.StateSize == 6)
class, ok := machine.Class.(AATLoopkup2)
tu.Assert(t, ok)
expMachineClassRecords := []LookupRecord2{
{FirstGlyph: 172, LastGlyph: 172, Value: 5},
{FirstGlyph: 486, LastGlyph: 491, Value: 5},
{FirstGlyph: 496, LastGlyph: 496, Value: 4},
{FirstGlyph: 502, LastGlyph: 504, Value: 4},
{FirstGlyph: 506, LastGlyph: 508, Value: 4},
{FirstGlyph: 592, LastGlyph: 592, Value: 5},
}
tu.Assert(t, reflect.DeepEqual(class.Records, expMachineClassRecords))
expMachineStates := [][]uint16{
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0000}, // 110: State[0][0..5]
{0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0000}, // 122: State[1][0..5]
{0x0000, 0x0000, 0x0001, 0x0000, 0x0001, 0x0002}, // 134: State[2][0..5]
}
tu.Assert(t, reflect.DeepEqual(machine.States, expMachineStates))
expMachineEntries := []AATStateEntry{
{NewState: 0, Flags: 0, data: [4]byte{0xff, 0xff, 0xff, 0xff}},
{NewState: 0x0002, Flags: 0, data: [4]byte{0xff, 0xff, 0xff, 0xff}},
{NewState: 0, Flags: 0x2820, data: [4]byte{0, 0, 0xff, 0xff}},
}
tu.Assert(t, reflect.DeepEqual(machine.Entries, expMachineEntries))
tu.Assert(t, reflect.DeepEqual(insert.Insertions, []GlyphID{0x022f}))
}
func TestParseKerx(t *testing.T) {
for _, filepath := range []string{
"toys/tables/kerx0.bin",
"toys/tables/kerx2.bin",
"toys/tables/kerx2bis.bin",
"toys/tables/kerx24.bin",
"toys/tables/kerx4-1.bin",
"toys/tables/kerx4-2.bin",
"toys/tables/kerx6Exp-VF.bin",
"toys/tables/kerx6-VF.bin",
} {
table, err := td.Files.ReadFile(filepath)
tu.AssertNoErr(t, err)
kerx, _, err := ParseKerx(table, 0xFF)
tu.AssertNoErr(t, err)
tu.Assert(t, len(kerx.Tables) > 0)
for _, subtable := range kerx.Tables {
tu.Assert(t, subtable.TupleCount > 0 == strings.Contains(filepath, "VF"))
switch data := subtable.Data.(type) {
case KerxData0:
tu.Assert(t, len(data.Pairs) > 0)
case KerxData2:
tu.Assert(t, data.Left != nil)
tu.Assert(t, data.Right != nil)
tu.Assert(t, int(data.KerningStart) <= len(data.KerningData))
case KerxData4:
tu.Assert(t, data.Anchors != nil)
}
}
}
}
func TestInvalidFeat(t *testing.T) {
// this is an invalid feat table, comming from a real font file (huh...)
file, err := td.Files.ReadFile("toys/tables/featInvalid.bin")
tu.AssertNoErr(t, err)
_, _, err = ParseFeat(file)
tu.Assert(t, err != nil)
}