Source code
Revision control
Copy as Markdown
Other Tools
---
# Integer layout coords inside a 1.25x stacking-context transform produce
# fractional device-space prim_rect, which `create_quad_primitive` rounds in
# device space. The shader inverse-maps the rounded p0 back to layout, giving
# a non-integer `local_prim_rect.p0`. Element offsets must be computed
# against this round-tripped p0 to keep the analytical clip aligned.
#
# At 1.25x the trailing-edge seam from the unfixed quad path lands at the
# device pixel just outside each box's right/bottom edge — same mechanism as
# the original Bugzilla report at 125% display scaling.
root:
items:
- type: stacking-context
bounds: [0, 0, 1000, 600]
transform: scale(1.25)
items:
- type: rect
bounds: [0, 0, 800, 480]
color: [255, 255, 255]
- type: rect
bounds: [50, 50, 200, 200]
color: [103, 150, 29]
- type: box-shadow
bounds: [50, 50, 200, 200]
color: [0, 0, 0, 0.47]
clip-mode: outset
offset: [0, 0]
blur-radius: 7
spread-radius: 2
- type: rect
bounds: [350, 50, 200, 200]
color: [103, 150, 29]
- type: box-shadow
bounds: [350, 50, 200, 200]
color: [0, 0, 0, 0.47]
clip-mode: inset
offset: [0, 0]
blur-radius: 7
spread-radius: 2