sub-rect-clamp.yaml

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# A CSS sprite sheet: the whole 48x48 sheet is pushed, scaled so each 16x16

# cell covers 40x40, and clipped down to the centre cell. That cell is uniform

# 0x7f and every neighbour is 0xff, so without the sub-rect restricting

# sampling the edges lerp towards white. See bug 1452337.

# The sub-rect restricts sampling only; the image still maps onto the whole

# bounds, which is why the bounds cover the sheet rather than the cell.

root:

  items:

    - image: checkerboard(0, 16, 16, 3, 3)

      bounds: [-40, -40, 120, 120]

      clip-rect: [0, 0, 40, 40]

      sub-rect: [16, 16, 16, 16]