The edge mode to use when texture reads stray off the edge of an image.
- iOS 9.0+
- macOS 10.13+
- Mac Catalyst 13.0+
- tvOS 9.0+
- Metal Performance Shaders
Most kernel objects can read off the edge of a source image. This can happen because of a negative offset property, because the
offset + clipRect.size is larger than the source image, or because the filter uses neighboring pixels in its calculations (e.g. convolution filters).
The default value is usually
MPSImageEdgeModeZero, but some kernels default to the
MPSImageEdgeModeClamp value instead if an edge mode of zero is either unsupported or undefined.
The position of the destination clip rectangle origin relative to the source buffer.
A signed coordinate with x, y, and z components.
An optional clip rectangle to use when writing data. Only the pixels in the rectangle will be overwritten.
The options used to control the edge behavior of an image filter when it reads outside the bounds of a source texture.