ISO/IEC INTERNATIONAL STANDARD 9636-4 First edition 1991-12-15 Information technology -- Computer graphics Interfacing techniques for dialogues with graphical devices (CGl) --- Functional specification - Part 4: Segments Technologies de r'information-Infographie--interfacespour I'infographie-Specificationsfonctionnelles- Partie4:Segments Reference number ISO/IEC9636-4:1991(E) ISO/IEC9636-4 :1991(E) Contents Page Foreword iv Introduction. 1 Scope 2 Normative references... 2 3 Concepts... 3.1 3 3.1.1 Relationship of CGI segments to the graphic output pipelinc 3.2 3 3.2.1 Segment identifiers. 3.2.2 Creating and closing segments. 3.2.3 Non-retained data... 3.2.4 Segment storage overflow. 3.3 Segment attributes 3.3.1 Introduction. 3.3.2 Segment highlighting 3.3.3 Segmcnt visibility... 3.3.4 Segment detectability 3.3.5 Segment display priority 3.3.6 Segment pick priority.. 3.3.7 Segmenttransformation 3.4 Segment display.... 3.4.1 Introduction 3.4.2 Segment regeneration. 6 3.4.3 Quickupdatemethods 8 3.4.4 Explicit segment display .. 9 3.5 Copy segment and the inheritance filter. 9 3.6 Delete and rename segments 10 Inquiry 10 3.7 Picking 3.8 10 3.9 State restrictions. 11 Interactionswithotherparts ofISO/IEC 9636... 12 4.1 Interactions with ISO/IEC 9636-2. 12 4.1.1 INITIALIZE and TERMINATE 12 4.2 Interactions with ISO/IEC 9636-5. 12 4.3 Interactions with ISO/IEC 9636-6. 12 Abstract specification of functions.. 13 5 5.1 13 Introduction......... 5.1.1 Datatypes 13 5.1.2 Validity of returned information. 13 5.2 Segment manipulation functions.. 13 5.2.1 GET NEW SEGMENT IDENTIFIER 13 5.2.2 CREATE SEGMENT... 13 5.2.3 REOPEN SEGMENT 14 5.2.4 CLOSE SEGMENT... 14 5.2.5 COPY SEGMENT... 15 5.2.6 DELETE SEGMENT 16 5.2.7 DELETE ALL SEGMENTS. 16 5.2.8 RENAME SEGMENT 17 5.2.9 DRAW ALL SEGMENTS 17 ISO/IEC1991 All rights rescrvcd. No part of this publication may be reproduced or utilized in any form or by anymeans,electronic or mechanicai.including photocopying and microfilm,without permission in writing from thc publishcr. ISO/IEC Copyright Office·Case postale 56.CH-1211 Geneve 20.Switzerland Printed in Switzerland ii ISO/IEC 9636-4 :1991 (E) 5.2.10 IMPLICITSEGMENTREGENERATIONMODE 17 5.2.11 RESET REGENERATION PENDING. 18 5.2.12 PICKIDENTIFIER.. 18 5.3 Segment attribute functions. 18 5.3.1 SEGMENT VISIBILITY 18 5.3.2 SEGMENT TRANSFORMATION 19 5.3.3 SEGMENT HIGHLIGHTING 19 5.3.4 SEGMENTDISPLAYPRIORITY 19 5.3.5 SEGMENT DETECTARILITY 20 5.3.6 SEGMENT PICK PRIORITY 20 5.4 Miscellaneous segment functions. 20 5.4.1 SIMULATE PICK 20 5.4.2 INHERITANCE FILTER. 21 5.4.3 CLIPPINGINHERITANCE 23 Segment inquiry functions. 24 6.1 Introduction..... 24 6.1.1 Data types employed.. 24 Validity of returned information. 6.1.2 24 6.2 Segment description table........ 24 6.2.1 INQUIRESEGMENTCAPABILITY 24 6.3 25 6.3.1 INQUIRESEGMENTSTATE 25 6.3.2 INQUIRELISTOFINHERITANCEFILTERSETTINGS. 25 6.3.3 INQUIRE CLIPPING INHERITANCE 25 6.3.4 INQUIRELISTOFSEGMENTIDENTIFIERSINUSE 25 6.4 Individual segment state list 26 6.4.1 INQUIRE INDIVIDUAL SEGMENT STATE 26 CGI description tables and state lists... 27 7.1 Description 27 7.2.1 Segment state 28 list. 7.2.2 Individual segment state list.. 28 A Formal grammar of the functional specification. 29 B Segmenterrors 39 C Guidelines to implementors 40 C Examples of COPY SEGMENT 41 ili