QMemoryBarrier¶
- PyQt5.Qt3DRender.QMemoryBarrier
Inherits from QFrameGraphNode.
Description¶
Class to emplace a memory barrier.
A QMemoryBarrier FrameGraph node is used to emplace a specific memory barrier at a specific time of the rendering. This is required to properly synchronize drawing and compute commands on the GPU.
The barrier defines the ordering of memory operations issued by a prior command. This means that if command1 is manipulating a buffer that is to be used as a vertex attribute buffer in a following command2, then the memory barrier should be placed after command1 and setting the appropriate barrier type for vertex attribute buffer.
When a QMemoryBarrier node is found in a FrameGraph branch, the barrier will be enforced prior to any draw or compute command even if these are defined deeper in the branch.
For OpenGL rendering, this page gives more info about the Memory Model
Classes¶
Enums¶
- Operation
This enum type describes types of buffer to be cleared.
Member
Value
Description
All TODO
TODO
AtomicCounter TODO
TODO
BufferUpdate TODO
TODO
Command TODO
TODO
ElementArray TODO
TODO
FrameBuffer TODO
TODO
None TODO
TODO
PixelBuffer TODO
TODO
QueryBuffer TODO
TODO
ShaderImageAccess TODO
TODO
ShaderStorage TODO
TODO
TextureFetch TODO
TODO
TextureUpdate TODO
TODO
TransformFeedback TODO
TODO
Uniform TODO
TODO
VertexAttributeArray TODO
TODO
Methods¶
- __init__(parent: QNode = None)
TODO
- setWaitOperations(Union[Operations, Operation])
TODO
- waitOperations() → Operations
See also
Signals¶
- waitOperationsChanged(Union[Operations, Operation])
TODO
