Currently we mostly iterate buffer areas using x/y loops or through
utility methods extending from base classes.
To simplify code in simple operations this commit adds wrappers for
specifying buffer areas and their iterators for raw buffers with any
element stride:
- BufferRange: Specifies a range of contiguous buffer elements from a
given element index.
- BufferRangeIterator: Iterates elements in a BufferRange.
- BufferArea: Specifies a rectangle area of elements in a 2D buffer.
- BufferAreaIterator: Iterates elements in a BufferArea.
- BuffersIterator: Simultaneously iterates an area of elements in an
output buffer and any number of input buffers.
- BuffersIteratorBuilder: Helper for building BuffersIterator adding
buffers one by one.
For iterating areas coordinates it adds `XRange` and `YRange` methods
that return `IndexRange`.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D11882
Adds full frame implementation to Image node operations.
Mostly refactored into buffer utility methods for reuse in other
operations.
No functional changes.
1.8x faster than tiled fallback.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D11559
These variables and methods should make it easier to loop through buffers elements/pixels. They take into account single element buffers.
Single element buffers can be used for set operations to reduce memory usage.
Usage example: P2078
Reviewed By: #compositing, jbakker
Differential Revision: https://developer.blender.org/D11015
