PgPHookRegister()

Load a Photon hook module

Synopsis:

int PgPHookRegister( char const *phook );

Arguments:

phook

The name of the hook module that you want to load; one of:

• PHOOK_DFLT — the default module.
• PHOOK_ROTATE90 — rotate the display 90 degrees.
• PHOOK_ROTATE180 — rotate the display 180 degrees.
• PHOOK_ROTATE270 — rotate the display 270 degrees.

Library:

ph

Description:

This function loads a Photon hook module, such as those that rotate the display, “on the fly.” No surface or layer is lost during the installation of the module.

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You can also use the phook option in the configuration file for io-display; for more information, see the Utilities Reference.

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To remove a currently installed hook module, invoke PgPHookRegister() with the PHOOK_DFLT parameter.

Returns:

0

Success.

-1

An error occurred.

Classification:

Photon

See also:

io-display; in the Utilities Reference