PgLockLayer()

Lock a layer for exclusive use by an application

Synopsis:

int PgLockLayer( int layer );

Arguments:

layer

The layer index, which must be 0 or greater.

Library:

ph

Description:

PgLockLayer() acquires exclusive use of a layer by an application. To unlock a layer, call PgUnlockLayer().

Other applications may not use PgSetLayerSurface() or PgSetLayerArg() on a locked surface.

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You must target this function at a device by calling PdSetTargetDevice().

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Your application should unlock its layers before it exits. You can lock a layer multiple times, but need to unlock it only once.

Returns:

0

Success.

-1

An error occurred (errno is set).

Errors:

EBUSY

The specified layer is locked by another application.

EINVAL

Any other error.

ENXIO

The layer doesn't exist.

EOPNOTSUPP

The operation isn't supported.

Classification:

Photon

See also:

PdSetTargetDevice(), PgSetLayerArg(), PgSetLayerSurface(), PgUnlockLayer()

“Layers” in the Raw Drawing and Animation chapter of the Photon Programmer's Guide