Commit Graph

2 Commits

Author SHA1 Message Date
Jeff Muizelaar
47e3115671 Bug 504920. Use cairo_set_can_convert_to_dib(TRUE) when creating optimized DDB image surfaces. r=vlad
This lets cairo convert and keep a DDB image into a DIB section when we paint
it to a canvas.  Avoiding the continuous conversion to an image surface
improves the performance of drawImage on to a canvas on Win32, in particular
the peacekeeper experimentalMovie benchmark.
2009-08-12 10:44:53 -04:00
Vladimir Vukicevic
2bfaffb3eb b=455513; add optional flag to allow converting a DDB to a DIB internally, if the surface is every used as a source; r=jmuizelaar
If a DDB is used as a source for an operation that can't be handled
natively by GDI, we end up needing to take a really slow path (creating a
temporary surface for acquire_source) for each operation.  If we convert
the DDB to a DIB, we then end up having a real image buffer and can hand
things off to pixman directly.

This isn't the default mode because I'm not sure if there are cases where a
DDB is explicitly needed (e.g. for printing), and it would change
current cairo behaviour.  It might become the default at some point in the
future.
2008-11-09 15:40:55 -08:00