Svg.tile.sample: def of gralha-svg-render@0.1.0.1
Import: import gralha-svg-render@0.1.0.1/svg.bend as Svg
Lines 2361-2374 of gralha-svg-render@0.1.0.1/svg.bend: https://jend.leeeet.dev/read.txt?path=gralha-svg-render@0.1.0.1/svg.bend&start_line=2361&end_line=2374

import Base
import gralha-text-scan@0.1.0.1/scan.bend as U
import gralha-image@0.1.0.1/image.bend as Img

# A grid of one reads the tile bilinearly at the point (aligned tiles at device
# density); a larger grid averages nearest reads of a denser tile over the
# device pixel's footprint, the pattern-space vectors u and v.
def tile.sample(+r: Raster, +q: Point, +w: F32, +h: F32, +opacity: F32, +u: Point, +v: Point, +grid: U32) -> Img.Color:
  Raster{origin, step, width, height, depth, linear, pixels} = r
  Point{x, y} = q
  +wd = width
  +ht = height
  +px = pixels
  +side = U32.shln(1, depth)
  U.branch(Img.Color, U32.is_eq(wd, 0) || U32.is_eq(ht, 0), _ => Img.clear(),
    _ => color.fade(U.branch(Img.Color, U32.is_le(grid, 1),
      _ => tile.blend(px, side, wd, ht, (tile.wrap(x, w) * U32.to_f32(wd) / w - 0.5 : F32), (tile.wrap(y, h) * U32.to_f32(ht) / h - 0.5 : F32)),
      _ => color.fade(tile.grid(px, side, wd, ht, w, h, Point{x, y}, u, v, grid, U32.to_nat((grid * grid : U32)), 0, Img.clear()), (1.0 / U32.to_f32((grid * grid : U32)) : F32))), opacity))

Uses (21):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32.div
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_le
  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.shln
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_f32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=gralha-image@0.1.0.1/image.bend&name=Color
  https://jend.leeeet.dev/definition.txt?path=gralha-image@0.1.0.1/image.bend&name=clear
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=Point
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=Raster
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=color.fade
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=tile.blend
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=tile.grid
  https://jend.leeeet.dev/definition.txt?path=gralha-svg-render@0.1.0.1/svg.bend&name=tile.wrap
  https://jend.leeeet.dev/definition.txt?path=gralha-text-scan@0.1.0.1/scan.bend&name=branch