// 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 // TODO: the opXXX constants without end-of-line comments are not yet implemented. 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 opSPVTL1 = 0x07 opSFVTL0 = 0x08 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 opSRP0 = 0x10 opSRP1 = 0x11 opSRP2 = 0x12 opSZP0 = 0x13 opSZP1 = 0x14 opSZP2 = 0x15 opSZPS = 0x16 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 opSSWCI = 0x1e opSSW = 0x1f 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 op_0x28 = 0x28 opUTP = 0x29 opLOOPCALL = 0x2a opCALL = 0x2b opFDEF = 0x2c opENDF = 0x2d opMDAP0 = 0x2e opMDAP1 = 0x2f opIUP0 = 0x30 opIUP1 = 0x31 opSHP0 = 0x32 opSHP1 = 0x33 opSHC0 = 0x34 opSHC1 = 0x35 opSHZ0 = 0x36 opSHZ1 = 0x37 opSHPIX = 0x38 opIP = 0x39 opMSIRP0 = 0x3a opMSIRP1 = 0x3b opALIGNRP = 0x3c opRTDG = 0x3d // Round To Double Grid opMIAP0 = 0x3e opMIAP1 = 0x3f opNPUSHB = 0x40 // PUSH N Bytes opNPUSHW = 0x41 // PUSH N Words opWS = 0x42 // Write Store opRS = 0x43 // Read Store opWCVTP = 0x44 opRCVT = 0x45 opGC0 = 0x46 opGC1 = 0x47 opSCFS = 0x48 opMD0 = 0x49 opMD1 = 0x4a opMPPEM = 0x4b opMPS = 0x4c opFLIPON = 0x4d opFLIPOFF = 0x4e 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 opEVEN = 0x57 opIF = 0x58 // IF test opEIF = 0x59 // End IF opAND = 0x5a // logical AND opOR = 0x5b // logical OR opNOT = 0x5c // logical NOT opDELTAP1 = 0x5d opSDB = 0x5e opSDS = 0x5f 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 opDELTAP2 = 0x71 opDELTAP3 = 0x72 opDELTAC1 = 0x73 opDELTAC2 = 0x74 opDELTAC3 = 0x75 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 opRUTG = 0x7c // Round Up To Grid opRDTG = 0x7d // Round Down To Grid opSANGW = 0x7e // Set ANGle Weight opAA = 0x7f // Adjust Angle opFLIPPT = 0x80 opFLIPRGON = 0x81 opFLIPRGOFF = 0x82 op_0x83 = 0x83 op_0x84 = 0x84 opSCANCTRL = 0x85 opSDPVTL0 = 0x86 opSDPVTL1 = 0x87 opGETINFO = 0x88 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 opINSTCTRL = 0x8e 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 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 = 0xdd opMDRP11101 = 0xdc opMDRP11110 = 0xde opMDRP11111 = 0xdf opMIRP00000 = 0xe0 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 = 0xfd opMIRP11101 = 0xfc 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, q, q, q, q, 2, 2, 0, 0, 0, q, // 0x00 - 0x0f q, q, q, q, q, q, q, 1, 0, 0, 1, 0, 1, q, q, q, // 0x10 - 0x1f 1, 1, 0, 2, 0, 1, 1, q, q, q, q, q, q, q, q, q, // 0x20 - 0x2f q, q, q, q, q, q, q, q, q, q, q, q, q, 0, q, q, // 0x30 - 0x3f 0, 0, 2, 1, q, q, q, q, q, q, q, q, q, q, q, 0, // 0x40 - 0x4f 2, 2, 2, 2, 2, 2, q, q, 1, 0, 2, 2, 1, q, q, q, // 0x50 - 0x5f 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x60 - 0x6f q, q, q, q, q, q, 1, 1, 2, 2, 0, q, 0, 0, 1, 1, // 0x70 - 0x7f q, q, q, q, q, q, q, q, q, 1, 3, 2, 2, q, q, q, // 0x80 - 0x8f q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0x90 - 0x9f q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0xa0 - 0xaf 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xb0 - 0xbf q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0xc0 - 0xcf q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0xd0 - 0xdf q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0xe0 - 0xef q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, q, // 0xf0 - 0xff } // popCount[opcode] == q means that that opcode is not yet implemented. const q = 255