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Am 19.01.2013 11:49, schrieb Florian Philipp: |
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> Hi list! |
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> |
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> I've noticed that there is probably a lot of performance to be gained |
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> from activating backend acceleration in cairo. It's just that I have no |
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> clue about the details: |
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> |
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> drm, gallium and opengl are all described as accelerating backends. Does |
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> that mean they are mutually exclusive or can I activate them all and |
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> cairo will sort it out? |
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> |
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> What does the qt4 use flag do? Is it just a language binding? |
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> |
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> Does anyone know a simple benchmark for cairo? |
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> |
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> Thanks in advance! |
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> Florian Philipp |
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> |
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I found your question very interesting, and so I used... google :D |
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-> Cairo seems to bring a benchmark with the source in cairo\perf. |
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-> http://cworth.org/intel/performance_measurement/ |
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-> The Phoronix test suit ofc has a performance test for cairo :) |
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-> I looked into some examples, and there are BIG differences between |
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gfx cards: |
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http://openbenchmarking.org/prospect/1204129-SU-NVIDIAGEF19/3653c29c52e5da38d1879d193dc660515f97d242 |
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|
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-> This posting is most interesting: |
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http://lists.cairographics.org/archives/cairo/2012-October/023609.html |
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As a nvidia blob user it seems I should be using the XRender backend. |
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But how? I can USE=-opengl to have that out of the way, but what's with |
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the other USE flags? .... looking at the ebuild I see, that I only need |
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"X" :) |
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|
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$(use_with X x) \ |
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$(use_enable X xlib) \ |
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$(use_enable X xlib-xrender) \ |
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$(use_enable aqua quartz) \ |
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$(use_enable aqua quartz-image) \ |
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$(use_enable debug test-surfaces) \ |
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$(use_enable directfb) \ |
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$(use_enable glib gobject) \ |
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$(use_enable doc gtk-doc) \ |
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$(use_enable openvg vg) \ |
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$(use_enable opengl gl) \ |
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$(use_enable qt4 qt) \ |
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$(use_enable static-libs static) \ |
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$(use_enable svg) \ |
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$(use_enable xcb) \ |
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$(use_enable xcb xcb-shm) \ |
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$(use_enable drm) \ |
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$(use_enable gallium) \ |
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Now I wonder if cairo doesn't simply choose the best one automatically? |
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Or should I "X -xcb -opengl -openvg"? |
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(Keeping "glib qt4 svg" for apps on.) |
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[..] |
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I used cairo-trace to start some programs and it seems like programs can |
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set their desired backend. There is a "/type" setting: |
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/type 42 set (firefox, soffice, clementine, evince, opera, |
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crack-attack, digikam, inkscape) |
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/type /xlib set (firefox, soffice, clementine, evince, |
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crack-attack, digikam, inkscape) |
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/type /xrender set (firefox, soffice, clementine) |
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I wonder what "42" is... |
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Greetings, |
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Daniel |
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