Several of our backends offer us a bounded source operator, and could be faster if we used it (D2D 1.1 has a bounded source option, Cairo is currently doing a clear to facilitate unbounded source). However some also offer no support, this patch adds an OP_SOURCE_MAY_BOUND, which means the user does not care whether the operator bounds the operation (i.e. they know they're filling the entire clipped region). This allows Canvas to get speced behavior and us still to get fast behavior on D2D 1.1 (and improved behavior on Canvas).

Comment on attachment 8488393 [details] [diff] [review] Part 2: Use OP_SOURCE_MAY_BOUND inside RotatedBuffer We're going to discuss this further at the next work week.

Comment on attachment 8488392 [details] [diff] [review] Part 1: Add OP_SOURCE_MAY_BOUND to Moz2D and implement on all backends Review of attachment 8488392 [details] [diff] [review]: ----------------------------------------------------------------- Into the trash!