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Fennec/NativeUI/Viewport: Difference between revisions
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→Implementation Assertions
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== Implementation Assertions == | == Implementation Assertions == | ||
* The firstPaint flag on the presShell is set by browser.js if and only if the next draw will be of a different document than the previous draw was. It is cleared as close to the composition of that draw as possible. | * The firstPaint flag on the presShell is set by browser.js if and only if the next draw will be of a different document than the previous draw was. It is cleared as close to the composition of that draw as possible. | ||
* A display port must always be set on the document element of the document being drawn. If no display port is set, then the layer may end up in a non-scrollable state, which can potentially confuse the compositor and interfere with propagating the correct page sizes. | |||
== Gotchas == | == Gotchas == | ||