BufferContext

class BufferContext

Bases: SavedContext

This is a base class for those kinds of SavedContexts that occupy an easily-measured (and substantial) number of bytes in the video card’s frame buffer memory or AGP memory. At the present, this includes most of the SavedContext types: VertexBufferContext and IndexBufferContext, as well as TextureContext.

This class provides methods for tracking the video memory utilization, as well as residency of each object, via PStats.

Inheritance diagram

bool get_active(void) const: Returns the active flag associated with this object. An object is considered “active” if it was rendered in the current frame.

std::size_t get_data_size_bytes(void) const: Returns the number of bytes previously reported for the data object. This is used to track changes in the data object’s allocated size; if it changes from this, we need to create a new buffer. This is also used to track memory utilization in PStats.

UpdateSeq get_modified(void) const: Returns the UpdateSeq that was recorded the last time mark_loaded() was called.

bool get_resident(void) const: Returns the resident flag associated with this object. An object is considered “resident” if it appears to be resident in texture memory.