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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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|
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/* SCCSid "$SunId$ SGI" */ |
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|
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/* |
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* Header for holodeck display drivers. |
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* Include after "rholo.h". |
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*/ |
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|
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/* display requests */ |
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#define DR_BUNDLE 1 /* bundle request */ |
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#define DR_ATTEN 2 /* request for attention */ |
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#define DR_SHUTDOWN 3 /* shutdown request */ |
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#define DR_NEWSET 4 /* new bundle set */ |
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#define DR_ADDSET 5 /* add to current set */ |
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#define DR_DELSET 6 /* delete from current set */ |
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|
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/* server responses */ |
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#define DS_BUNDLE 1 /* computed bundle */ |
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#define DS_ACKNOW 2 /* acknowledge request for attention */ |
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#define DS_SHUTDOWN 3 /* end process and close connection */ |
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#define DS_ADDHOLO 4 /* register new holodeck */ |
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#define DS_STARTIMM 5 /* begin immediate bundle set */ |
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#define DS_ENDIMM 6 /* end immediate bundle set */ |
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|
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/* |
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* Normally, the server channel has priority, with the display process |
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* checking it frequently for new data. However, when the display process |
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* makes a request for attention (DR_ATTEN), the server will finish its |
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* current operations and flush its buffers, sending an acknowledge |
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* message (DS_ACKNOW) when it's done. This then allows the |
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* display process to send a long request to the holodeck server. |
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* Priority returns to normal after the following request. |
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*/ |
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|
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typedef struct { |
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int2 type; /* message type */ |
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int4 nbytes; /* number of additional bytes */ |
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} MSGHEAD; /* message head */ |
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|
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/* display request message bodies */ |
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|
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/* DR_BUNDLE */ |
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#define BUNDLE_REQ PACKHEAD |
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/* DR_ATTEN */ |
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/* no body */ |
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/* DR_SHUTDOWN */ |
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/* no body */ |
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/* DR_NEWSET */ |
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/* body is nbytes/sizeof(BUNDLE_REQ) BUNDLE_REQ bodies */ |
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/* DR_ADDSET */ |
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/* body is nbytes/sizeof(PACKHEAD) BUNDLE_REQ bodies */ |
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/* DR_DELSET */ |
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/* body is nbytes/sizeof(PACKHEAD) BUNDLE_REQ bodies */ |
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|
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/* server response message bodies */ |
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|
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/* DS_BUNDLE */ |
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#define BUNDLE_RES PACKHEAD /* followed by nr RAYVAL structs */ |
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/* DS_ACKNOW */ |
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/* no body */ |
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/* DS_SHUTDOWN */ |
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/* no body */ |
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/* DS_ADDHOLO */ |
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#define HOLO_RES HDGRID |
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/* DS_STARTIMM */ |
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/* no body */ |
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/* DS_ENDIMM */ |
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/* no body */ |
