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Claim ยท cairn 0.5.2
cairn^1007 An image's pixels stay inside its box
An assumption of cairn 0.5.2.
- Id
cairn^1007- Kind
- assume
- Reads as
- assumed
- Version
- 0.5.2
What it says
An image draw changes no pixel outside its rect (snapped to device pixels as rects are) within the clip in force, whatever its destination rect and scale; a draw naming a source the host holds no image for changes nothing.
Evidence
| assumed | Stated, not proved. The proofs rely on it. | |
| fuzzed | Not shown yet: the trusted-base fuzzer's check render.image.bounds held. A CI step will publish it (#95). | |
Where it's defined
- Declaration
Cairn.Fuzz.Trusted.Claims.hostImageBounds- Module
Cairn.Fuzz.Trusted.Claims- Source
lean/Cairn/Fuzz/Trusted/Claims.lean:230atv0.5.2- Statement hash
-
Ledger
cairn^1007 is active in this version's claims.lock. An id never moves or changes meaning.