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
|
// Copyright 2012 The Freetype-Go Authors. All rights reserved.
// Use of this source code is governed by your choice of either the
// FreeType License or the GNU General Public License version 2 (or
// any later version), both of which can be found in the LICENSE file.
package truetype
// The Truetype opcodes are summarized at
// https://developer.apple.com/fonts/TTRefMan/RM07/appendixA.html
const (
opSVTCA0 = 0x00 // Set freedom and projection Vectors To Coordinate Axis
opSVTCA1 = 0x01 // .
opSPVTCA0 = 0x02 // Set Projection Vector To Coordinate Axis
opSPVTCA1 = 0x03 // .
opSFVTCA0 = 0x04 // Set Freedom Vector to Coordinate Axis
opSFVTCA1 = 0x05 // .
opSPVTL0 = 0x06 // Set Projection Vector To Line
opSPVTL1 = 0x07 // .
opSFVTL0 = 0x08 // Set Freedom Vector To Line
opSFVTL1 = 0x09 // .
opSPVFS = 0x0a // Set Projection Vector From Stack
opSFVFS = 0x0b // Set Freedom Vector From Stack
opGPV = 0x0c // Get Projection Vector
opGFV = 0x0d // Get Freedom Vector
opSFVTPV = 0x0e // Set Freedom Vector To Projection Vector
opISECT = 0x0f // moves point p to the InterSECTion of two lines
opSRP0 = 0x10 // Set Reference Point 0
opSRP1 = 0x11 // Set Reference Point 1
opSRP2 = 0x12 // Set Reference Point 2
opSZP0 = 0x13 // Set Zone Pointer 0
opSZP1 = 0x14 // Set Zone Pointer 1
opSZP2 = 0x15 // Set Zone Pointer 2
opSZPS = 0x16 // Set Zone PointerS
opSLOOP = 0x17 // Set LOOP variable
opRTG = 0x18 // Round To Grid
opRTHG = 0x19 // Round To Half Grid
opSMD = 0x1a // Set Minimum Distance
opELSE = 0x1b // ELSE clause
opJMPR = 0x1c // JuMP Relative
opSCVTCI = 0x1d // Set Control Value Table Cut-In
opSSWCI = 0x1e // Set Single Width Cut-In
opSSW = 0x1f // Set Single Width
opDUP = 0x20 // DUPlicate top stack element
opPOP = 0x21 // POP top stack element
opCLEAR = 0x22 // CLEAR the stack
opSWAP = 0x23 // SWAP the top two elements on the stack
opDEPTH = 0x24 // DEPTH of the stack
opCINDEX = 0x25 // Copy the INDEXed element to the top of the stack
opMINDEX = 0x26 // Move the INDEXed element to the top of the stack
opALIGNPTS = 0x27 // ALIGN PoinTS
op_0x28 = 0x28 // deprecated
opUTP = 0x29 // UnTouch Point
opLOOPCALL = 0x2a // LOOP and CALL function
opCALL = 0x2b // CALL function
opFDEF = 0x2c // Function DEFinition
opENDF = 0x2d // END Function definition
opMDAP0 = 0x2e // Move Direct Absolute Point
opMDAP1 = 0x2f // .
opIUP0 = 0x30 // Interpolate Untouched Points through the outline
opIUP1 = 0x31 // .
opSHP0 = 0x32 // SHift Point using reference point
opSHP1 = 0x33 // .
opSHC0 = 0x34 // SHift Contour using reference point
opSHC1 = 0x35 // .
opSHZ0 = 0x36 // SHift Zone using reference point
opSHZ1 = 0x37 // .
opSHPIX = 0x38 // SHift point by a PIXel amount
opIP = 0x39 // Interpolate Point
opMSIRP0 = 0x3a // Move Stack Indirect Relative Point
opMSIRP1 = 0x3b // .
opALIGNRP = 0x3c // ALIGN to Reference Point
opRTDG = 0x3d // Round To Double Grid
opMIAP0 = 0x3e // Move Indirect Absolute Point
opMIAP1 = 0x3f // .
opNPUSHB = 0x40 // PUSH N Bytes
opNPUSHW = 0x41 // PUSH N Words
opWS = 0x42 // Write Store
opRS = 0x43 // Read Store
opWCVTP = 0x44 // Write Control Value Table in Pixel units
opRCVT = 0x45 // Read Control Value Table entry
opGC0 = 0x46 // Get Coordinate projected onto the projection vector
opGC1 = 0x47 // .
opSCFS = 0x48 // Sets Coordinate From the Stack using projection vector and freedom vector
opMD0 = 0x49 // Measure Distance
opMD1 = 0x4a // .
opMPPEM = 0x4b // Measure Pixels Per EM
opMPS = 0x4c // Measure Point Size
opFLIPON = 0x4d // set the auto FLIP Boolean to ON
opFLIPOFF = 0x4e // set the auto FLIP Boolean to OFF
opDEBUG = 0x4f // DEBUG call
opLT = 0x50 // Less Than
opLTEQ = 0x51 // Less Than or EQual
opGT = 0x52 // Greater Than
opGTEQ = 0x53 // Greater Than or EQual
opEQ = 0x54 // EQual
opNEQ = 0x55 // Not EQual
opODD = 0x56 // ODD
opEVEN = 0x57 // EVEN
opIF = 0x58 // IF test
opEIF = 0x59 // End IF
opAND = 0x5a // logical AND
opOR = 0x5b // logical OR
opNOT = 0x5c // logical NOT
opDELTAP1 = 0x5d // DELTA exception P1
opSDB = 0x5e // Set Delta Base in the graphics state
opSDS = 0x5f // Set Delta Shift in the graphics state
opADD = 0x60 // ADD
opSUB = 0x61 // SUBtract
opDIV = 0x62 // DIVide
opMUL = 0x63 // MULtiply
opABS = 0x64 // ABSolute value
opNEG = 0x65 // NEGate
opFLOOR = 0x66 // FLOOR
opCEILING = 0x67 // CEILING
opROUND00 = 0x68 // ROUND value
opROUND01 = 0x69 // .
opROUND10 = 0x6a // .
opROUND11 = 0x6b // .
opNROUND00 = 0x6c // No ROUNDing of value
opNROUND01 = 0x6d // .
opNROUND10 = 0x6e // .
opNROUND11 = 0x6f // .
opWCVTF = 0x70 // Write Control Value Table in Funits
opDELTAP2 = 0x71 // DELTA exception P2
opDELTAP3 = 0x72 // DELTA exception P3
opDELTAC1 = 0x73 // DELTA exception C1
opDELTAC2 = 0x74 // DELTA exception C2
opDELTAC3 = 0x75 // DELTA exception C3
opSROUND = 0x76 // Super ROUND
opS45ROUND = 0x77 // Super ROUND 45 degrees
opJROT = 0x78 // Jump Relative On True
opJROF = 0x79 // Jump Relative On False
opROFF = 0x7a // Round OFF
op_0x7b = 0x7b // deprecated
opRUTG = 0x7c // Round Up To Grid
opRDTG = 0x7d // Round Down To Grid
opSANGW = 0x7e // Set ANGle Weight
opAA = 0x7f // Adjust Angle
opFLIPPT = 0x80 // FLIP PoinT
opFLIPRGON = 0x81 // FLIP RanGe ON
opFLIPRGOFF = 0x82 // FLIP RanGe OFF
op_0x83 = 0x83 // deprecated
op_0x84 = 0x84 // deprecated
opSCANCTRL = 0x85 // SCAN conversion ConTRoL
opSDPVTL0 = 0x86 // Set Dual Projection Vector To Line
opSDPVTL1 = 0x87 // .
opGETINFO = 0x88 // GET INFOrmation
opIDEF = 0x89 // Instruction DEFinition
opROLL = 0x8a // ROLL the top three stack elements
opMAX = 0x8b // MAXimum of top two stack elements
opMIN = 0x8c // MINimum of top two stack elements
opSCANTYPE = 0x8d // SCANTYPE
opINSTCTRL = 0x8e // INSTRuction execution ConTRoL
op_0x8f = 0x8f
op_0x90 = 0x90
op_0x91 = 0x91
op_0x92 = 0x92
op_0x93 = 0x93
op_0x94 = 0x94
op_0x95 = 0x95
op_0x96 = 0x96
op_0x97 = 0x97
op_0x98 = 0x98
op_0x99 = 0x99
op_0x9a = 0x9a
op_0x9b = 0x9b
op_0x9c = 0x9c
op_0x9d = 0x9d
op_0x9e = 0x9e
op_0x9f = 0x9f
op_0xa0 = 0xa0
op_0xa1 = 0xa1
op_0xa2 = 0xa2
op_0xa3 = 0xa3
op_0xa4 = 0xa4
op_0xa5 = 0xa5
op_0xa6 = 0xa6
op_0xa7 = 0xa7
op_0xa8 = 0xa8
op_0xa9 = 0xa9
op_0xaa = 0xaa
op_0xab = 0xab
op_0xac = 0xac
op_0xad = 0xad
op_0xae = 0xae
op_0xaf = 0xaf
opPUSHB000 = 0xb0 // PUSH Bytes
opPUSHB001 = 0xb1 // .
opPUSHB010 = 0xb2 // .
opPUSHB011 = 0xb3 // .
opPUSHB100 = 0xb4 // .
opPUSHB101 = 0xb5 // .
opPUSHB110 = 0xb6 // .
opPUSHB111 = 0xb7 // .
opPUSHW000 = 0xb8 // PUSH Words
opPUSHW001 = 0xb9 // .
opPUSHW010 = 0xba // .
opPUSHW011 = 0xbb // .
opPUSHW100 = 0xbc // .
opPUSHW101 = 0xbd // .
opPUSHW110 = 0xbe // .
opPUSHW111 = 0xbf // .
opMDRP00000 = 0xc0 // Move Direct Relative Point
opMDRP00001 = 0xc1 // .
opMDRP00010 = 0xc2 // .
opMDRP00011 = 0xc3 // .
opMDRP00100 = 0xc4 // .
opMDRP00101 = 0xc5 // .
opMDRP00110 = 0xc6 // .
opMDRP00111 = 0xc7 // .
opMDRP01000 = 0xc8 // .
opMDRP01001 = 0xc9 // .
opMDRP01010 = 0xca // .
opMDRP01011 = 0xcb // .
opMDRP01100 = 0xcc // .
opMDRP01101 = 0xcd // .
opMDRP01110 = 0xce // .
opMDRP01111 = 0xcf // .
opMDRP10000 = 0xd0 // .
opMDRP10001 = 0xd1 // .
opMDRP10010 = 0xd2 // .
opMDRP10011 = 0xd3 // .
opMDRP10100 = 0xd4 // .
opMDRP10101 = 0xd5 // .
opMDRP10110 = 0xd6 // .
opMDRP10111 = 0xd7 // .
opMDRP11000 = 0xd8 // .
opMDRP11001 = 0xd9 // .
opMDRP11010 = 0xda // .
opMDRP11011 = 0xdb // .
opMDRP11100 = 0xdc // .
opMDRP11101 = 0xdd // .
opMDRP11110 = 0xde // .
opMDRP11111 = 0xdf // .
opMIRP00000 = 0xe0 // Move Indirect Relative Point
opMIRP00001 = 0xe1 // .
opMIRP00010 = 0xe2 // .
opMIRP00011 = 0xe3 // .
opMIRP00100 = 0xe4 // .
opMIRP00101 = 0xe5 // .
opMIRP00110 = 0xe6 // .
opMIRP00111 = 0xe7 // .
opMIRP01000 = 0xe8 // .
opMIRP01001 = 0xe9 // .
opMIRP01010 = 0xea // .
opMIRP01011 = 0xeb // .
opMIRP01100 = 0xec // .
opMIRP01101 = 0xed // .
opMIRP01110 = 0xee // .
opMIRP01111 = 0xef // .
opMIRP10000 = 0xf0 // .
opMIRP10001 = 0xf1 // .
opMIRP10010 = 0xf2 // .
opMIRP10011 = 0xf3 // .
opMIRP10100 = 0xf4 // .
opMIRP10101 = 0xf5 // .
opMIRP10110 = 0xf6 // .
opMIRP10111 = 0xf7 // .
opMIRP11000 = 0xf8 // .
opMIRP11001 = 0xf9 // .
opMIRP11010 = 0xfa // .
opMIRP11011 = 0xfb // .
opMIRP11100 = 0xfc // .
opMIRP11101 = 0xfd // .
opMIRP11110 = 0xfe // .
opMIRP11111 = 0xff // .
)
// popCount is the number of stack elements that each opcode pops.
var popCount = [256]uint8{
// 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f
0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2, 0, 0, 0, 5, // 0x00 - 0x0f
1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, // 0x10 - 0x1f
1, 1, 0, 2, 0, 1, 1, 2, 0, 1, 2, 1, 1, 0, 1, 1, // 0x20 - 0x2f
0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 2, 2, 0, 0, 2, 2, // 0x30 - 0x3f
0, 0, 2, 1, 2, 1, 1, 1, 2, 2, 2, 0, 0, 0, 0, 0, // 0x40 - 0x4f
2, 2, 2, 2, 2, 2, 1, 1, 1, 0, 2, 2, 1, 1, 1, 1, // 0x50 - 0x5f
2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x60 - 0x6f
2, 1, 1, 1, 1, 1, 1, 1, 2, 2, 0, 0, 0, 0, 1, 1, // 0x70 - 0x7f
0, 2, 2, 0, 0, 1, 2, 2, 1, 1, 3, 2, 2, 1, 2, 0, // 0x80 - 0x8f
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x90 - 0x9f
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xa0 - 0xaf
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xb0 - 0xbf
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0xc0 - 0xcf
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0xd0 - 0xdf
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xe0 - 0xef
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xf0 - 0xff
}
|