-
Notifications
You must be signed in to change notification settings - Fork 7
/
Copy pathsegment_test.go
320 lines (282 loc) · 12.5 KB
/
segment_test.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
package graphite
import (
"bytes"
"fmt"
"strconv"
"strings"
"testing"
testdata "github.com/benoitkugler/textlayout-testdata/graphite"
"github.com/benoitkugler/textlayout/fonts/truetype"
)
// Test shaping output against the reference graphite implementation
type testOptions struct {
input []rune
// justification int // we dont support neither test this feature
offset int // zero for us
}
func lookup(map_ []*Slot, val *Slot) int {
i := 0
for ; map_[i] != val && map_[i] != nil; i++ {
}
if map_[i] != nil {
return i
}
return -1
}
func (opts testOptions) dumpSegment(seg *Segment) ([]byte, error) {
// int i = 0;
// float advanceWidth;
// #ifndef NDEBUG
// int numSlots = gr_seg_n_slots(seg);
// #endif
// size_t *map = new size_t [seg.length() + 1];
// if (opts.justification > 0){
// advanceWidth = gr_seg_justify(seg, gr_seg_first_slot(seg), sizedFont, gr_seg_advance_X(seg) * opts.justification / 100., gr_justCompleteLine, NULL, NULL);
// }else{
advanceWidth := seg.Advance.X
map_ := make([]*Slot, seg.NumGlyphs+1)
for slot, i := seg.First, 0; slot != nil; slot, i = slot.Next, i+1 {
map_[i] = slot
}
buf := new(bytes.Buffer)
fmt.Fprintf(buf, "Segment length: %d\n", seg.NumGlyphs)
fmt.Fprintf(buf, "pos gid attach\t x\t y\tins bw\t chars\t\tUnicode\t")
fmt.Fprintf(buf, "\n")
i := 0
for slot := seg.First; slot != nil; slot, i = slot.Next, i+1 {
// consistency check for last slot
assertion := ((i+1 < seg.NumGlyphs) || (slot == seg.last))
if !assertion {
return nil, fmt.Errorf("invalid slot index: %d %d", i, seg.NumGlyphs)
}
orgX := slot.Position.X
orgY := slot.Position.Y
cinfo := seg.getCharInfo(slot.original)
breakWeight := 0
if cinfo != nil {
breakWeight = int(cinfo.breakWeight)
}
fmt.Fprintf(buf, "%02d %4d %3d@%d,%d\t%6.1f\t%6.1f\t%2d%4d\t%3d %3d\t",
i, slot.GID(), lookup(map_, slot.parent),
slot.getAttr(seg, acAttX, 0), slot.getAttr(seg, acAttY, 0),
orgX, orgY, boolToInt(slot.CanInsertBefore()),
breakWeight, slot.Before, slot.After)
if slot.Before+opts.offset < len(opts.input) && slot.After+opts.offset < len(opts.input) {
fmt.Fprintf(buf, "%7x\t%7x",
opts.input[slot.Before+opts.offset],
opts.input[slot.After+opts.offset])
}
fmt.Fprintf(buf, "\n")
}
assertion := (i == seg.NumGlyphs)
if !assertion {
return nil, fmt.Errorf("wrong number of slots: %d != %d", i, seg.NumGlyphs)
}
// assign last point to specify advance of the whole array
// position arrays must be one bigger than what countGlyphs() returned
fmt.Fprintf(buf, "Advance width = %6.1f\n", advanceWidth)
fmt.Fprintf(buf, "\nChar\tUnicode\tBefore\tAfter\tBase\n")
for j, c := range seg.charinfo {
fmt.Fprintf(buf, "%d\t%04X\t%d\t%d\t%d\n", j, c.char, c.before, c.after, c.base)
}
return buf.Bytes(), nil
}
func parseFeatures(face *GraphiteFace, features string) (FeaturesValue, []byte, error) {
if features == "" {
return nil, nil, nil
}
// special case for language
if strings.HasPrefix(features, "lang=") {
var buf [4]byte
copy(buf[:], features[5:])
langID := truetype.MustNewTag(string(buf[:]))
return face.FeaturesForLang(langID), nil, nil
}
var (
out = face.FeaturesForLang(0)
buf = new(bytes.Buffer)
)
for _, feature := range strings.Split(features, ",") {
fg := strings.Split(feature, "=")
if len(fg) != 2 {
return nil, nil, fmt.Errorf("invalid feature format: %s", feature)
}
val, err := strconv.Atoi(fg[1])
if err != nil {
return nil, nil, fmt.Errorf("invalid feature format %s: %s", feature, err)
}
// feature id is either a 4 bytes-tag or a decimal digit
featTag, err := strconv.Atoi(fg[0])
if err != nil {
if len(fg[0]) != 4 {
return nil, nil, fmt.Errorf("invalid feature format: %s", feature)
}
featTag = int(truetype.MustNewTag(fg[0]))
}
tag := truetype.Tag(featTag)
if featVal := out.FindFeature(tag); featVal != nil {
featVal.Value = int16(val)
if featTag > 0x20000000 {
fmt.Fprintf(buf, "%s=%d\n", tag.String(), val)
} else {
fmt.Fprintf(buf, "%d=%d\n", tag, val)
}
}
}
return out, buf.Bytes(), nil
}
func checkSegmentNumGlyphs(seg *Segment) error {
var nb int
for s := seg.First; s != nil; s = s.Next {
nb++
}
if nb != seg.NumGlyphs {
return fmt.Errorf("invalid number of glyphs: %d != %d", nb, seg.NumGlyphs)
}
return nil
}
type shapingInput struct {
name, fontfile string
features string
text []rune
rtl bool
}
func runesToText(rs []rune) string {
var runes []string
for _, r := range rs {
runes = append(runes, fmt.Sprintf("0x%04x", r))
}
return fmt.Sprintf("[]rune{%s}", strings.Join(runes, ","))
}
// returns a Go compatible representation
func (input shapingInput) String() string {
return fmt.Sprintf("{name: %q, fontfile: %q, text: %s, features: %q, rtl: %v},\n",
input.name, input.fontfile, runesToText(input.text), input.features, input.rtl)
}
func (input shapingInput) testWithScale(t *testing.T, expected []byte, scale bool) error {
face := loadGraphite(t, input.fontfile)
out := "Text codes\n"
for i, r := range input.text {
if (i+1)%10 == 0 {
out += fmt.Sprintf("%4x\n", r)
} else {
out += fmt.Sprintf("%4x\t", r)
}
}
out += "\n"
feats, outFeats, err := parseFeatures(face, input.features)
if err != nil {
return fmt.Errorf("test %s: %s", input.name, err)
}
out += string(outFeats)
var font *FontOptions
if scale {
const (
pointSize = 12
dpi = 72
)
font = NewFontOptions(pointSize*dpi/72, face)
}
seg := face.Shape(font, input.text, 0, feats, int8(boolToInt(input.rtl)))
if err = checkSegmentNumGlyphs(seg); err != nil {
return fmt.Errorf("test %s: %s", input.name, err)
}
opts := testOptions{input: input.text}
segString, err := opts.dumpSegment(seg)
if err != nil {
return fmt.Errorf("test %s: %s", input.name, err)
}
out += string(segString)
if out != string(expected) {
return fmt.Errorf("for test %s, expected\n%s\n got \n%s\n", input.name, expected, out)
}
return nil
}
func (input shapingInput) test(t *testing.T, expected []byte) error {
return input.testWithScale(t, expected, true)
}
var referenceFonttestInput = []shapingInput{
{"padauk1", "Padauk.ttf", "", []rune{0x1015, 0x102F, 0x100F, 0x1039, 0x100F, 0x1031, 0x1038}, false},
{"padauk2", "Padauk.ttf", "", []rune{0x1000, 0x103C, 0x102D, 0x102F}, false},
{"padauk3", "Padauk.ttf", "", []rune{0x101e, 0x1004, 0x103a, 0x1039, 0x1001, 0x103b, 0x102d, 0x102f, 0x1004, 0x103a, 0x1038}, false},
{"padauk4", "Padauk.ttf", "", []rune{0x1005, 0x1000, 0x1039, 0x1000, 0x1030}, false},
{"padauk5", "Padauk.ttf", "", []rune{0x1000, 0x103c, 0x1031, 0x102c, 0x1004, 0x1037, 0x103a}, false},
{"padauk6", "Padauk.ttf", "", []rune{0x1000, 0x102D, 0x1005, 0x1039, 0x1006, 0x102C}, false},
// padauk7 can cause an infinite loop, though the text is miss-spelt
{"padauk7", "Padauk.ttf", "", []rune{0x1017, 0x1014, 0x103c, 0x103d, 0x102f}, false},
{"padauk8", "Padauk.ttf", "", []rune{0x1004, 0x103A, 0x1039, 0x1005}, false},
{"padauk9", "Padauk.ttf", "", []rune{0x1004, 0x103A, 0x1039}, false},
{"padauk10", "Padauk.ttf", "kdot=1,wtri=1", []rune{0x1004, 0x103D, 0x1000, 0x103A}, false},
{"padauk11", "Padauk.ttf", "", []rune{0x100B, 0x1039, 0x100C, 0x1031, 0x102C}, false},
{"scher1", "Scheherazadegr.ttf", "", []rune{0x0628, 0x0628, 0x064E, 0x0644, 0x064E, 0x0654, 0x0627, 0x064E}, true},
{"scher2", "Scheherazadegr.ttf", "", []rune{0x0627, 0x0644, 0x0625, 0x0639, 0x0644, 0x0627, 0x0646}, true},
{"scher3", "Scheherazadegr.ttf", "", []rune{0x0627, 0x0031, 0x0032, 0x002D, 0x0034, 0x0035, 0x0627}, true},
{"scher4", "Scheherazadegr.ttf", "", []rune{0x0627, 0x0653, 0x06AF}, true},
{"charis1", "charis.ttf", "", []rune{0x0069, 0x02E6, 0x02E8, 0x02E5}, false},
{"charis2", "charis.ttf", "", []rune{0x1D510, 0x0041, 0x1D513}, false},
{"charis3", "charis.ttf", "lang=vie", []rune{0x0054, 0x0069, 0x1ec3, 0x0075}, false},
{"charis4", "charis.ttf", "", []rune{0x006b, 0x0361, 0x070}, false},
{"charis5", "charis.ttf", "", []rune{0x0020, 0x006C, 0x0325, 0x0065}, false},
{"charis7", "charis_fast.ttf", "", []rune{0x0049, 0x0065, 0x006C, 0x006C, 0x006F}, false},
{"charis8", "charis.ttf", "lang=vi ", []rune{0x0054, 0x0069, 0x1ec3, 0x0075}, false},
{"magyar1", "MagyarLinLibertineG.ttf", "210=36", []rune{0x0031, 0x0035}, false},
{"magyar2", "MagyarLinLibertineG.ttf", "210=200", []rune{0x0031, 0x0030}, false},
{"magyar3", "MagyarLinLibertineG.ttf", "209=3", []rune{0x0066, 0x0069, 0x0066, 0x0074, 0x0079, 0x002d, 0x0066, 0x0069, 0x0076, 0x0065}, false},
{"grtest1", "grtest1gr.ttf", "", []rune{0x0062, 0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0062, 0x0061}, false},
{"general1", "general.ttf", "", []rune{0x0E01, 0x0062}, false},
{"piglatin1", "PigLatinBenchmark_v3.ttf", "", []rune{0x0068, 0x0065, 0x006C, 0x006C, 0x006F}, false},
// we dont support justification
// {"padauk12", "Padauk.ttf", []rune{0x0048, 0x0065, 0x006C,0x006C,0x006F,0x0020,0x004D,0x0075,0x006D -j 107}},
// {"charis6", "charis.t"",tf", []rune{0x0048, 0x0065, 0x006C,0x006C,0x006F,0x0020,0x004D,0x0075,0x006D -j 107}, false},
// {"scher5", "Scheherazadegr_noglyfs.t"",tf", []rune{0x0627, 0x0653, 0x06AF}, true},
}
func TestShapeSegment(t *testing.T) {
for _, input := range referenceFonttestInput {
expected, err := testdata.Files.ReadFile("shape_refs/" + input.name + ".log")
if err != nil {
t.Fatal(err)
}
if err := input.test(t, expected); err != nil {
t.Fatal(err)
}
}
}
// fail cases from TestReferenceShaping
var fuzzTestInput = []shapingInput{
{name: "fuzz_0", fontfile: "MagyarLinLibertineG.ttf", text: []rune{0x0066, 0x0069}, features: "210=36", rtl: false},
{name: "fuzz_1", fontfile: "Padauk.ttf", text: []rune{0x1039}, features: "kdot=1,wtri=1", rtl: true},
{name: "fuzz_2", fontfile: "Padauk.ttf", text: []rune{0x1039}, features: "kdot=1,wtri=1", rtl: false},
{name: "fuzz_3", fontfile: "Padauk.ttf", text: []rune{0x103a, 0x1005, 0x1039}, features: "kdot=1,wtri=1", rtl: false},
{name: "fuzz_4", fontfile: "charis_fast.ttf", text: []rune{0x0065, 0x0049}, features: "", rtl: true},
{name: "fuzz_5", fontfile: "charis_fast.ttf", text: []rune{0x006f, 0x006f, 0x0049, 0x0065}, features: "", rtl: true},
{name: "fuzz_6", fontfile: "charis_fast.ttf", text: []rune{0x0049, 0x0065, 0x006f, 0x0049}, features: "", rtl: true},
{name: "fuzz_7", fontfile: "charis_fast.ttf", text: []rune{0x0049, 0x0065, 0x0049, 0x0065, 0x006f}, features: "", rtl: true},
{name: "fuzz_8", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x064c, 0x062e, 0x064e, 0x062f, 0x0699}, features: "", rtl: true},
{name: "fuzz_9", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x0768, 0x0643}, features: "", rtl: false},
{name: "fuzz_10", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x06c6, 0x068a, 0x062c, 0x0648}, features: "", rtl: false},
{name: "fuzz_11", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x06c6, 0x06af, 0x06c3}, features: "", rtl: false},
{name: "fuzz_12", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x0020, 0x0637, 0x0681}, features: "", rtl: false},
{name: "fuzz_13", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x0647, 0x06cd}, features: "", rtl: true},
{name: "fuzz_14", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x063a, 0x06c4, 0x0686, 0x06d4, 0x069b, 0x0636, 0x064b, 0x0647, 0x062e, 0x06cd, 0x06f0}, features: "", rtl: true},
{name: "fuzz_15", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x064f, 0x06f9, 0x0639, 0x0652, 0x0681, 0x0644, 0x0697, 0x0769, 0x0690, 0x06c3, 0x0644, 0x06d2, 0x0636, 0x0673, 0x06f4, 0x064f, 0x06f8, 0x0652, 0x06b3, 0x0648, 0x002d, 0x0622}, features: "", rtl: true},
{name: "fuzz_16", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x0685, 0x0650, 0x06c2, 0x076a, 0x0699, 0x06ab, 0x062b, 0x0696, 0x0629, 0x06cc, 0x06ea, 0x0675, 0x06d2, 0x0645, 0x0768, 0x06ea, 0x0670}, features: "", rtl: false},
{name: "fuzz_17", fontfile: "AwamiNastaliq-Regular.ttf", text: []rune{0x0644, 0x062f, 0x064f, 0x200e, 0x064e, 0x06f8, 0x064c, 0x06af, 0x0686, 0x0630, 0x064f, 0xfd3e, 0x06ea, 0x200e, 0x007c, 0x0644, 0x061b, 0x06ea, 0x0643, 0x0650, 0x06cc, 0x0681, 0x064c, 0x0652, 0x0630, 0x06f3, 0x06f5, 0x0690, 0x06d4}, features: "", rtl: false},
}
func TestShapeSegmentFuzz(t *testing.T) {
// WARNING: the debug mode must be disabled for some
// test to pass (due to the additional positionSlots calls)
for _, input := range fuzzTestInput {
// tr.reset()
expected, err := testdata.Files.ReadFile("shape_refs/fuzz/" + input.name + ".log")
if err != nil {
t.Fatal(err)
}
err = input.test(t, expected)
// if err := tr.dump("testdata/trace.json"); err != nil {
// t.Fatal(err)
// }
if err != nil {
t.Fatal(err)
}
}
}