PdOffscreenContext_t

Data structure that describes an offscreen context

Synopsis:

typedef struct pdoffscreencontext {
    PhDrawContext_t     dc;
    PgVidMemTag_t       id;
    PhRid_t             target_rid;
    PhDim_t             dim;
    long unsigned       format;
    long unsigned       flags;
    void * volatile     shared_ptr;
    unsigned long       shared_size;
    unsigned long       pitch;
    PhConnectId_t       connect_id;
    } PdOffscreenContext_t;

Description:

This data structure describes an offscreen context.

Don't change the value of any of the members of this structure.

PdOffscreenContext_t includes:

dc

The draw context.

id

Offscreen memory block tag.

target_rid

The ID of the target region.

dim

A PhDim_t structure that defines the dimensions of the offscreen context.

format

The type of image; see PhImage_t.

flags

The flags used when the context was created; see PdCreateOffscreenContext() and PdDupOffscreenContext().

shared_ptr

A pointer to the shared memory object for the context. This is valid only after calling PdGetOffscreenContextPtr().

shared_size

The size of the shared memory object, in bytes.

pitch

The number of bytes per scan line.

connect_id

The ID of the connection to Photon.

Classification:

Photon

See also:

PdCreateOffscreenContext(), PdDupOffscreenContext(), PdGetOffscreenContextPtr(), PdSetOffscreenTranslation(), PgContextBlit(), PgContextBlitArea(), PgSwapDisplay(), PhDim_t

"Video memory offscreen" in the Raw Drawing and Animation chapter of the Photon Programmer's Guide