panda3d.core.ShaderBuffer

class ShaderBuffer

Bases: TypedWritableReferenceCount, Namable, GeomEnums

This is a generic buffer object that lives in graphics memory.

New in version 1.10.0.

Inheritance diagram

Inheritance diagram of ShaderBuffer

__init__(param0: ShaderBuffer) → None
__init__(name: str, size: uint64_t, usage_hint: UsageHint) → None

Creates an uninitialized buffer object with the given size. For now, these parameters cannot be modified, but this may change in the future.

__init__(name: str, initial_data: bytes, usage_hint: UsageHint) → None

Creates a buffer object initialized with the given data. For now, these parameters cannot be modified, but this may change in the future.

prepare(prepared_objects: PreparedGraphicsObjects) → None

Indicates that the data should be enqueued to be prepared in the indicated prepared_objects at the beginning of the next frame. This will ensure the data is already loaded into the GSG if it is expected to be rendered soon.

Use this function instead of prepareNow() to preload datas from a user interface standpoint.

isPrepared(prepared_objects: PreparedGraphicsObjects) → bool

Returns true if the data has already been prepared or enqueued for preparation on the indicated GSG, false otherwise.

prepareNow(prepared_objects: PreparedGraphicsObjects, gsg: GraphicsStateGuardianBase) → BufferContext

Creates a context for the data on the particular GSG, if it does not already exist. Returns the new (or old) BufferContext. This assumes that the GraphicsStateGuardian is the currently active rendering context and that it is ready to accept new datas. If this is not necessarily the case, you should use prepare() instead.

Normally, this is not called directly except by the GraphicsStateGuardian; a data does not need to be explicitly prepared by the user before it may be rendered.

Return type

BufferContext

release(prepared_objects: PreparedGraphicsObjects) → bool

Frees the data context only on the indicated object, if it exists there. Returns true if it was released, false if it had not been prepared.

releaseAll() → int

Frees the context allocated on all objects for which the data has been declared. Returns the number of contexts which have been freed.

static getClassType() → TypeHandle
Return type

TypeHandle

property data_size_bytes

Returns the buffer size in bytes.

Return type

uint64_t

property usage_hint

Returns the buffer usage hint.

Return type

UsageHint