[cairo] [RFC] Remove client-side workarounds
thjaeger at gmail.com
Sun May 24 16:49:23 PDT 2009
Sorry, here they are.
Thomas Jaeger wrote:
> Here's an updated version of the patches that applies against current
> cairo master. I've changed the first patch to require X servers >=
> 1.6.99 for server-side compositing with extend mode EXTEND_PAD or
> Thomas Jaeger wrote:
>> These are various performance fixes for cairo moving operations
>> (composite, gradients) from the client to the server, which avoid an
>> expensive transfer of a pixmap over the wire. For handing off gradient
>> creation to Render, I've adapted an old patch of David Reveman:
>> Especially the first patch is important, since currently it is
>> prohibitively expensive for example for firefox to use linear
>> interpolation for image upscaling due to the client-side fallback.
>> On my system, this causes only one additional test (extend-pad-border)
>> to fail in the cairo test suite. The expected and actual output look
>> identical, so this could be a subpixel offset in the intel driver.
>> Certainly not something we need to worry about very much considering how
>> many of the tests fail on current master.
>> An important question is when to use Render for Pad/Reflect (see the
>> commit message of the first patch), as we can't detect whether the X
>> server is using a broken driver and/or pixman version. I haven't
>> implemented any checks for now, mainly because I'm unsure about which X
>> server version would be reasonably safe.
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