KernelWindow.band: def of stelliferous@0.0.2.0
Import: import stelliferous@0.0.2.0/kernel_window.bend as KernelWindow
Lines 18-26 of stelliferous@0.0.2.0/kernel_window.bend: https://jend.leeeet.dev/read.txt?path=stelliferous@0.0.2.0/kernel_window.bend&start_line=18&end_line=26

import Base

# Rows read by output positions [offset, offset + span), kept inside the parent
# window [parent_first, parent_first + parent_rows). A band has at least one row,
# and its first row stays a stride multiple.
def band(+parent_first: U32,+parent_rows: U32,+height: U32,+kernel: U32,+stride: U32,+padding: U32,+output_width: U32,+offset: U32,+span: U32) -> Band:
  +parent_end = (parent_first + parent_rows : U32)
  +top = ((parent_end - 1) / stride * stride : U32)
  +first = U32.max(parent_first,U32.min(first_row(stride,padding,(offset / output_width : U32)),top))
  +last = end_row(height,kernel,stride,padding,((offset + span - 1) / output_width : U32))
  Band{first,(U32.min(parent_end,U32.max(last,(first + 1 : U32))) - first : U32)}

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.div
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.max
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.min
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/kernel_window.bend&name=Band
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/kernel_window.bend&name=end_row
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/kernel_window.bend&name=first_row