HP SVA V2.1 Parallel Compositing Reference Guide

Table 2-2 PCchannel Fields (continued)
DescriptionResult Property
The number of elements between the start of row n and
row n + 1 of the array.
rowLength
The number of bytes between the start of adjacent array
elements.
size
The width of the result in pixels.
width
The x offset of the origin of the result within the output.
xOffset
The y offset of the origin of the result within the output.
yOffset
Table 2-3 describes the types of channels available.
Table 2-3 Channel Types
DescriptionChannel Type
The channel holding the color values.
PC_CHANNEL_COLOR
The channel holding the depth values.
PC_CHANNEL_DEPTH
Summary of Session and System Functions
This section summarizes session and system functions. Detailed syntax for the functions is in
“Session and System Functions” (page 37).
Table 2-4 lists and briefly describes the session and system functions.
Table 2-4 System and Session Functions
DescriptionFunction
Creates a Library session.
pcSessionCreate
Destroys a Library session.
pcSessionDestroy
Un-initializes the Library for a program.
pcSystemFinalize
Retrieves a system property as an integer.
pcSystemGetInteger
Retrieves a system property as a string.
pcSystemGetString
Initializes the Library for a program.
pcSystemInitialize
System Properties
A system used by a program has a set of properties. These properties tell the program about the
environment where it is running. For example, the program can determine the extensions
supported by the Library on the system, or what networks are available for the programs to use.
The only property that can be set by a program is PC_SESSION_PATH. This property is set by
pcSystemInitialize.
Some properties have multiple values and you need to qualify which value you want. An example
is PC_NETWORK_NAME, which is qualified by the integer index assigned to a specific network by
the Library. Varying the qualifier between 0 and PC_NUM_NETWORKS - 1, a program can
discover all the networks supported by the Library on this system.
Use the same version of the Library for all nodes.
26 Overview of Functions and Properties