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
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
|
#ifndef OT_GLYF_VARCOMPOSITEGLYPH_HH
#define OT_GLYF_VARCOMPOSITEGLYPH_HH
#include "../../hb-open-type.hh"
#include "coord-setter.hh"
namespace OT {
namespace glyf_impl {
struct VarCompositeGlyphRecord
{
protected:
enum var_composite_glyph_flag_t
{
USE_MY_METRICS = 0x0001,
AXIS_INDICES_ARE_SHORT = 0x0002,
UNIFORM_SCALE = 0x0004,
HAVE_TRANSLATE_X = 0x0008,
HAVE_TRANSLATE_Y = 0x0010,
HAVE_ROTATION = 0x0020,
HAVE_SCALE_X = 0x0040,
HAVE_SCALE_Y = 0x0080,
HAVE_SKEW_X = 0x0100,
HAVE_SKEW_Y = 0x0200,
HAVE_TCENTER_X = 0x0400,
HAVE_TCENTER_Y = 0x0800,
GID_IS_24 = 0x1000,
AXES_HAVE_VARIATION = 0x2000,
};
public:
unsigned int get_size () const
{
unsigned int size = min_size;
unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 4 : 3;
size += numAxes * axis_width;
// gid
size += 2;
if (flags & GID_IS_24) size += 1;
if (flags & HAVE_TRANSLATE_X) size += 2;
if (flags & HAVE_TRANSLATE_Y) size += 2;
if (flags & HAVE_ROTATION) size += 2;
if (flags & HAVE_SCALE_X) size += 2;
if (flags & HAVE_SCALE_Y) size += 2;
if (flags & HAVE_SKEW_X) size += 2;
if (flags & HAVE_SKEW_Y) size += 2;
if (flags & HAVE_TCENTER_X) size += 2;
if (flags & HAVE_TCENTER_Y) size += 2;
return size;
}
bool has_more () const { return true; }
bool is_use_my_metrics () const { return flags & USE_MY_METRICS; }
hb_codepoint_t get_gid () const
{
if (flags & GID_IS_24)
return StructAfter<const HBGlyphID24> (numAxes);
else
return StructAfter<const HBGlyphID16> (numAxes);
}
unsigned get_numAxes () const
{
return numAxes;
}
unsigned get_num_points () const
{
unsigned num = 0;
if (flags & AXES_HAVE_VARIATION) num += numAxes;
if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) num++;
if (flags & HAVE_ROTATION) num++;
if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y)) num++;
if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y)) num++;
if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) num++;
return num;
}
void transform_points (hb_array_t<contour_point_t> record_points,
contour_point_vector_t &points) const
{
float matrix[4];
contour_point_t trans;
get_transformation_from_points (record_points, matrix, trans);
points.transform (matrix);
points.translate (trans);
}
static inline void transform (float (&matrix)[4], contour_point_t &trans,
float (other)[6])
{
// https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L268
float xx1 = other[0];
float xy1 = other[1];
float yx1 = other[2];
float yy1 = other[3];
float dx1 = other[4];
float dy1 = other[5];
float xx2 = matrix[0];
float xy2 = matrix[1];
float yx2 = matrix[2];
float yy2 = matrix[3];
float dx2 = trans.x;
float dy2 = trans.y;
matrix[0] = xx1*xx2 + xy1*yx2;
matrix[1] = xx1*xy2 + xy1*yy2;
matrix[2] = yx1*xx2 + yy1*yx2;
matrix[3] = yx1*xy2 + yy1*yy2;
trans.x = xx2*dx1 + yx2*dy1 + dx2;
trans.y = xy2*dx1 + yy2*dy1 + dy2;
}
static void translate (float (&matrix)[4], contour_point_t &trans,
float translateX, float translateY)
{
// https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L213
float other[6] = {1.f, 0.f, 0.f, 1.f, translateX, translateY};
transform (matrix, trans, other);
}
static void scale (float (&matrix)[4], contour_point_t &trans,
float scaleX, float scaleY)
{
// https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L224
float other[6] = {scaleX, 0.f, 0.f, scaleY, 0.f, 0.f};
transform (matrix, trans, other);
}
static void rotate (float (&matrix)[4], contour_point_t &trans,
float rotation)
{
// https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L240
rotation = rotation * float (M_PI);
float c = cosf (rotation);
float s = sinf (rotation);
float other[6] = {c, s, -s, c, 0.f, 0.f};
transform (matrix, trans, other);
}
static void skew (float (&matrix)[4], contour_point_t &trans,
float skewX, float skewY)
{
// https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L255
skewX = skewX * float (M_PI);
skewY = skewY * float (M_PI);
float other[6] = {1.f, tanf (skewY), tanf (skewX), 1.f, 0.f, 0.f};
transform (matrix, trans, other);
}
bool get_points (contour_point_vector_t &points) const
{
float translateX = 0.f;
float translateY = 0.f;
float rotation = 0.f;
float scaleX = 1.f * (1 << 12);
float scaleY = 1.f * (1 << 12);
float skewX = 0.f;
float skewY = 0.f;
float tCenterX = 0.f;
float tCenterY = 0.f;
if (unlikely (!points.resize (points.length + get_num_points ()))) return false;
unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1;
unsigned axes_size = numAxes * axis_width;
const F2DOT14 *q = (const F2DOT14 *) (axes_size +
(flags & GID_IS_24 ? 3 : 2) +
&StructAfter<const HBUINT8> (numAxes));
hb_array_t<contour_point_t> rec_points = points.as_array ().sub_array (points.length - get_num_points ());
unsigned count = numAxes;
if (flags & AXES_HAVE_VARIATION)
{
for (unsigned i = 0; i < count; i++)
rec_points[i].x = *q++;
rec_points += count;
}
else
q += count;
const HBUINT16 *p = (const HBUINT16 *) q;
if (flags & HAVE_TRANSLATE_X) translateX = * (const FWORD *) p++;
if (flags & HAVE_TRANSLATE_Y) translateY = * (const FWORD *) p++;
if (flags & HAVE_ROTATION) rotation = * (const F2DOT14 *) p++;
if (flags & HAVE_SCALE_X) scaleX = * (const F4DOT12 *) p++;
if (flags & HAVE_SCALE_Y) scaleY = * (const F4DOT12 *) p++;
if (flags & HAVE_SKEW_X) skewX = * (const F2DOT14 *) p++;
if (flags & HAVE_SKEW_Y) skewY = * (const F2DOT14 *) p++;
if (flags & HAVE_TCENTER_X) tCenterX = * (const FWORD *) p++;
if (flags & HAVE_TCENTER_Y) tCenterY = * (const FWORD *) p++;
if ((flags & UNIFORM_SCALE) && !(flags & HAVE_SCALE_Y))
scaleY = scaleX;
if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y))
{
rec_points[0].x = translateX;
rec_points[0].y = translateY;
rec_points++;
}
if (flags & HAVE_ROTATION)
{
rec_points[0].x = rotation;
rec_points++;
}
if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y))
{
rec_points[0].x = scaleX;
rec_points[0].y = scaleY;
rec_points++;
}
if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y))
{
rec_points[0].x = skewX;
rec_points[0].y = skewY;
rec_points++;
}
if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y))
{
rec_points[0].x = tCenterX;
rec_points[0].y = tCenterY;
rec_points++;
}
assert (!rec_points);
return true;
}
void get_transformation_from_points (hb_array_t<contour_point_t> rec_points,
float (&matrix)[4], contour_point_t &trans) const
{
if (flags & AXES_HAVE_VARIATION)
rec_points += numAxes;
matrix[0] = matrix[3] = 1.f;
matrix[1] = matrix[2] = 0.f;
trans.init (0.f, 0.f);
float translateX = 0.f;
float translateY = 0.f;
float rotation = 0.f;
float scaleX = 1.f;
float scaleY = 1.f;
float skewX = 0.f;
float skewY = 0.f;
float tCenterX = 0.f;
float tCenterY = 0.f;
if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y))
{
translateX = rec_points[0].x;
translateY = rec_points[0].y;
rec_points++;
}
if (flags & HAVE_ROTATION)
{
rotation = rec_points[0].x / (1 << 14);
rec_points++;
}
if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y))
{
scaleX = rec_points[0].x / (1 << 12);
scaleY = rec_points[0].y / (1 << 12);
rec_points++;
}
if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y))
{
skewX = rec_points[0].x / (1 << 14);
skewY = rec_points[0].y / (1 << 14);
rec_points++;
}
if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y))
{
tCenterX = rec_points[0].x;
tCenterY = rec_points[0].y;
rec_points++;
}
assert (!rec_points);
translate (matrix, trans, translateX + tCenterX, translateY + tCenterY);
rotate (matrix, trans, rotation);
scale (matrix, trans, scaleX, scaleY);
skew (matrix, trans, -skewX, skewY);
translate (matrix, trans, -tCenterX, -tCenterY);
}
void set_variations (coord_setter_t &setter,
hb_array_t<contour_point_t> rec_points) const
{
bool have_variations = flags & AXES_HAVE_VARIATION;
unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1;
const HBUINT8 *p = (const HBUINT8 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2));
const HBUINT16 *q = (const HBUINT16 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2));
const F2DOT14 *a = (const F2DOT14 *) ((HBUINT8 *) (axis_width == 1 ? (p + numAxes) : (HBUINT8 *) (q + numAxes)));
unsigned count = numAxes;
for (unsigned i = 0; i < count; i++)
{
unsigned axis_index = axis_width == 1 ? (unsigned) *p++ : (unsigned) *q++;
signed v = have_variations ? rec_points[i].x : *a++;
v += setter[axis_index];
v = hb_clamp (v, -(1<<14), (1<<14));
setter[axis_index] = v;
}
}
protected:
HBUINT16 flags;
HBUINT8 numAxes;
public:
DEFINE_SIZE_MIN (3);
};
using var_composite_iter_t = composite_iter_tmpl<VarCompositeGlyphRecord>;
struct VarCompositeGlyph
{
const GlyphHeader &header;
hb_bytes_t bytes;
VarCompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) :
header (header_), bytes (bytes_) {}
var_composite_iter_t iter () const
{ return var_composite_iter_t (bytes, &StructAfter<VarCompositeGlyphRecord, GlyphHeader> (header)); }
};
} /* namespace glyf_impl */
} /* namespace OT */
#endif /* OT_GLYF_VARCOMPOSITEGLYPH_HH */
|