48519030561365T84 9637 PT*1 94 INTERNATIONAL ISO/IEC STANDARD 9637-1 First edition 1994-03-01 Information technology -- Computer graphics Interfacing techniques for dialogues with graphical devices (CGl) Data stream binding Part 1: Character encoding Technologies de Iinformation - Infographie - Techniques interfaciales de dialogues avec dispositifs graphiques (CGl) -- -Liaison de courant D - Partie 1:Codage des caracteres IEC Reference number ISO/IEC9637-1:1994(E) pyInationalganizaifStandardizatio ense with ISC 9637 'PT*1 94 99ET950 E06T59 910 ISO/IEC 9637-1:1994 (E) @ISO/IEC Contents CGI Character Encoding Contents Foreword. iv Introduction 0.1 Purpose of the character encoding 0.2 Objectives .... 0.3 Relationship to other International Standards 1 Scope 2 Normative references 2 3 Notational conventions..... 3.1 7-Bit and 8-Bit code tables .... 3.2 Code extension techniques vocabulary 3.2.1 Co sets 3.2.2 Ci sets . 3.2.3 Gsets. 4 Overall structure 4.1 General form of the data stream .. 4.2 Entering and leaving the CGI environment. 4.2.1 4.2.2 Designating and invoking the CGI coding environment from ISO 2022 4.3 Encodingfunctions 5 Method of encoding opcodes .......... 5.1 Encoding technique of the basic opcode set .. 5.2 Extensionmechanism. 5.3 Opcode assignments 5.4 Opcodes for soliciting functions 9 6 Methodofencodingparameters 20 6.1 Basic format 21 6.2 Bitstream format 21 6.3 Coding integers (I, IF8, IF16, IF32 22 6.4 Coding real numbers (R) .... 6.5 Coding Virtual Device Coordinates and Points (VDC, P) 6.6 Coding point list parameters (nP)...... 6.6.1 Displacement mode 26 6.6.2 Incremental mode 26 6.6.3 Incremental mode encoding 31 6.7 Colour specifiers (CI, CD) 31 6.8 Colour lists (nCI, nCD) ..... 32 6.8.1 Normal format (coding type=0) ... 33 6.8.2 Bitstream format (coding type=1) 33 6.8.3 Runiength format (coding type=2) 34 6.8.4 Runlength bitstream format (coding type: 34 ?ISO/IEC1994 All rights reserved.Unless otherwise specified,no partof thispublicationmay be reproduced or utilized in any form or by any means, clectronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office - Case postale 56 CH-1211 Geneve 20- Switzerland Printed in Switzerland ii Copyright International Organization for Standardizatior Not for Resale 48519030561367857 9637PT*1 五6 CISO/IEC ISO/IEC 9637-1:1994 (E) CGI Character Encoding Contents 6.8.5 34 6.9 String parameters (S, SF) 36 6.9.1 Overall string parameter format 36 6.9.2 Bit combinations permitted within string parameters of text functions 36 6.9.3 Co control within string parameters 37 6.9.4 Using G-sets in string parameters . 37 6.9.4.1 String parameters and character sets. . 37 6.9.4.2 String parameters of other CGI functions 38 6.10 Enumerated parameters (E) 38 6.11 Index parameters (IX) 39 6.12 Client specified name parameters (CSN) 39 6.13 Input colour parameters (ICO, nICO) 40 6.14 Data record parameters (D) 40 7 Character substitution 42 8 Representation of CGI functions . 44 8.1 44 8.2 45 8.3 Functions not specified in ISO/IEC 9636 45 8.3.1 DOMAINRING 45 8.3.2 INTEGERPRECISION 45 8.3.3 REALPRECISION 46 8.3.4 INDEX PRECISION 46 8.3.5 COLOUR PRECISION 师师 8.3.6 COLOUR INDEX PRECISION 8.3.7 VDC INTEGER PRECISION 47 8.3.8 VDC REAL PRECISION 47 8.3.9 CLIENT SPECIFIED NAME PRECISION 48 8.4 Encoding of matrices .. 48 9 Defaults .. .50 10 Classification and designation 51 .52 Annex B: List of escape sequences. 63 iii Copyright International Organization for Standardization without license from IHS Not for Re ISO/IEC 9637-1:1994 (E) @ISO/IEC Foreword CGI Character Encoding Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of Intermational Standards through technical committees established by the respective org