forked from codeskyblue/gobuild
/
opcodes.go
289 lines (285 loc) · 10.1 KB
/
opcodes.go
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// 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
}