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1. X Window System Application Interface V2

Product Information

Environment Specification

Answer the questions for each binary-compatible family. Alternately, provide the answers in the Appendix at the end of this document.

	Testing Environment	Binary-compatible Family	Portability Environment	Indicator of Compliance	Compliance Details
			None.	Select from this list Test Report from Test Suite	Test Suite: Test Report:
			None.	Select from this list Test Report from Test Suite	Test Suite: Test Report:
			None.	Select from this list Test Report from Test Suite	Test Suite: Test Report:
			None.	Select from this list Test Report from Test Suite	Test Suite: Test Report:
			None.	Select from this list Test Report from Test Suite	Test Suite: Test Report:

Temporary Waivers

1.1 Functionality Provided

1.1.1 Standard Window Properties

Question 1: Does the toolkit automatically set standard window properties?

Response

Yes   No

Rationale

If application programmers do not use a toolkit that automatically sets standard window properties, they should set these properties for top-level windows before mapping them.

Reference

CAE Specification, Window Management (X11R5): Xlib-C Language Binding, Section 4.3, Creating Windows.

1.1.2 Default GC Font Value

Question 2: What is the default GC font value?

Response

Rationale

The default GC font value is implementation-dependent.

Reference

CAE Specification, Window Management (X11R5): Xlib-C Language Binding, Section 8.1, Manipulating Graphics Context/State.

1.1.3 Event Handling Functions

Question 3: Does the toolkit use its own event handling functions which can not be interchanged with those in Xlib?

Response

Yes   No

Rationale

Some toolkits use their own event handling functions and do not allow you to interchange them with those in Xlib.

Reference

CAE Specification, Window Management (X11R5): Xlib-C Language Binding, Chapter 12, Event Handling Functions.

1.2 Data Type Definitions

Question 4: What are the definitions of the implementation-defined data types?

Enter the implementation's definition for each of these opaque types.

Response

Data Type	Definition
Boolean
Cardinal
Dimension
Position
XtPointer
XtArgVal
XtEnum

Rationale

To increase the portability of widget and application source code between different system environments, the Intrinsics define several data types whose precise representation is explicitly dependent upon, and chosen by, each individual implementation of the Intrinsics.

Reference

CAE Specification, Window Management (X11R5): X Toolkit Intrinsics, Section 3.5, Implementation-Specific Types.

1.3 Types of Display

Question 5: Are local displays supported?

Response

Yes   No

Rationale

The Product Standard definition states that it is optional whether displays are local and/or remote.

Reference

The X/Open Branding Programme, How to Brand \(em What to Buy, Part 2, Component Definitions, X Window System Application Interface V2.

Question 6: Are remote displays supported?

Response

Yes   No

Rationale

The Product Standard definition states that it is optional whether displays are local and/or remote.

Reference

The X/Open Branding Programme, How to Brand \(em What to Buy, Part 2, Component Definitions, X Window System Application Interface V2.

1.4 Displays Using the X Protocol

Question 7: Can your implementation interface to displays using the X Protocol?

Response

Yes   No

Rationale

The Product Standard definition states that the implementation may communicate with displays using the X Protocol.

Reference

The X/Open Branding Programme, How to Brand \(em What to Buy, Part 2, Component Definitions, X Window System Application Interface V2.

The questions in the rest of this section apply only if the answer to Question 7 is YES.

1.4.1 X Protocol Version and Extensions

Question 8: What versions of the X Protocol does your implementation support?

Response

	Major Version Number	Minor Version Number

Rationale

A server can refuse connections from clients that offer a different version from the one the server supports.

Reference

CAE Specification, Window Management (X11R5): X Window System Protocol, Section 3.3.2, Server Response.

Question 9: What extensions to the X Protocol does your implementation support?

Response

	Extension Name	Major Opcode

Rationale

Named extensions to the core protocol can be defined to extend the system. Extension to output requests, resources and event types are all possible and are expected.

Every request contains an 8-bit major opcode. Major opcodes 128 through 255 are reserved for extensions.

Every error includes an 8-bit error code. Error codes 128 through 255 are reserved for extensions.

Every event includes an 8-bit type code. Event codes 64 through 127 are reserved for extensions.

Reference

CAE Specification, Window Management (X11R5): X Window System Protocol, Section 3.1.1, Request Format, Section 3.1.3, Error Format, Section 3.1.4, Event Format, and Glossary.

1.4.2 Underlying Communications Mechanisms

What communications protocols does your server support beneath the X Protocol?

Response

Rationale

For remote clients, the X Protocol can be built on top of any reliable byte stream. The Product Standard definition states that TCP/IP must be supported and that other protocols may be supported as well.

Reference

CAE Specification, Window Management (X11R5): X Window System Protocol, Chapter 3, Protocol Overview.

Question 11: What inter-process communication mechanisms does your server support beneath the X Protocol?

Response

Rationale

For local clients, the way that information is passed depends on the inter-process communication channel the client and server use.

Reference

CAE Specification, Window Management (X11R5): X Window System Protocol, Chapter 3, Protocol Overview.

Question 12: How are communications mechanisms other than TCP/IP specified to the XOpenDisplay function?

Response

Rationale

If the hostname (part of the display_name argument of XOpenDisplay) is a host machine name and a single colon separates the hostname and display number, XOpenDisplay connects using TCP streams.

Reference

CAE Specification, Window Management (X11R5): Xlib-C Language Binding, Section 3.1, Opening the Display.

2. Appendix

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3. Change History