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Query the capabilities of a layer
int PgGetLayerCaps( int layer,
int format_index,
PgLayerCaps_t *const caps );
- layer
- The layer index, which must be 0 or greater.
- format_index
- The format index, which must be 0 or greater.
- caps
- A pointer to a
PgLayerCaps_t
structure that the function fills with the layer capabilities.
Any existing content of the structure is discarded.
This argument must not be NULL.
ph
PgGetLayerCaps() queries the capabilities of the given layer,
in the given format.
You can use the format_index to iterate through all of
the available layer formats.
An error is returned when format_index exceeds the number of
supported formats.
- 0
- Success.
- -1
- An error occurred
(errno
is set).
- EFAULT
- The caps argument is NULL.
- EINVAL
- The layer index is invalid, or
the format_index if greater than the number of formats.
- ENXIO
- The layer doesn't exist.
- EOPNOTSUPP
- The driver doesn't support layers.
Photon
Safety: | |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
PdSetTargetDevice(),
PgLayerCaps_t
“Layers”
in the Raw Drawing and Animation chapter of the
Photon Programmer's Guide
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