| 0135a41e095a433414e21e37b277dab7dcbec373 |
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15-May-2015 |
mtklein <mtklein@chromium.org> |
Sk4px: Difference and Exclusion
This will cause minor (off-by-one) diffs due to a little lost precision:
colortype_xfermodes
mixed_xfermodes
xfermodes2
xfermodeimagefilter
xfermodes3
xfermodes
Desktop:
Xfermode_Difference_aa 9.77ms -> 7.32ms 0.75x
Xfermode_Exclusion_aa 8.49ms -> 6.21ms 0.73x
Xfermode_Difference 17ms -> 7.54ms 0.44x
Xfermode_Exclusion 13.5ms -> 5.09ms 0.38x
N7:
Xfermode_Difference_aa 32.2ms -> 27.6ms 0.86x
Xfermode_Difference 43.9ms -> 32ms 0.73x
Xfermode_Exclusion_aa 40.5ms -> 26.7ms 0.66x
Xfermode_Exclusion 71.5ms -> 23.9ms 0.33x
This wraps up the xfermodes implemented in Sk4f.
BUG=skia:
Review URL: https://codereview.chromium.org/1141213002
/external/skia/src/core/Sk4px.h
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| 2d8d33e9e825f9919875be64a71b746189b385be |
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13-May-2015 |
mtklein <mtklein@chromium.org> |
Sk4px: SrcATop, DstATop, Xor, Multiply
SSE runs 2-3x faster (than 4f), NEON runs 1.2-1.4x faster (than existing NEON).
Small diffs on {aarectmodes, imagefilters_xfermodes, hairmodes, mixed_xfermodes} only on AA edges due to precision drop.
BUG=skia:
Review URL: https://codereview.chromium.org/1132853005
/external/skia/src/core/Sk4px.h
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| 8a90edc2a58a4f8a4b4da73eb08e943be09538c0 |
|
13-May-2015 |
mtklein <mtklein@chromium.org> |
Sk4px: alphas() and Load[24]Alphas()
alphas() extracts the 4 alphas from an existing Sk4px as another Sk4px.
LoadNAlphas() constructs an Sk4px from N packed alphas.
In both cases, we end up with 4x repeated alphas aligned with their pixels.
alphas()
A0 R0 G0 B0 A1 R1 G1 B1 A2 R2 G2 B2 A3 R3 G3 B3
->
A0 A0 A0 A0 A1 A1 A1 A1 A2 A2 A2 A2 A3 A3 A3 A3
Load4Alphas()
A0 A1 A2 A3
->
A0 A0 A0 A0 A1 A1 A1 A1 A2 A2 A2 A2 A3 A3 A3 A3
Load2Alphas()
A0 A1
->
A0 A0 A0 A0 A1 A1 A1 A1 0 0 0 0 0 0 0 0
This is a 5-10% speedup for AA on Intel, and wash on ARM.
AA is still mostly dominated by the final lerp.
alphas() isn't used yet, but it's similar enough to Load[24]Alphas()
that it was easier to write all at once.
BUG=skia:
Review URL: https://codereview.chromium.org/1138333003
/external/skia/src/core/Sk4px.h
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| 6cbf18c70bf99f58b2bb1c49cdf8d41be561fee4 |
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13-May-2015 |
mtklein <mtklein@chromium.org> |
Plus xfermode using Sk4px.
Xfermode_Plus runs 4-5x faster.
We expect mixed_xfermodes to have a small diff. This is because kFoldCoverageIntoSrcAlpha was incorrectly set to true.
This implementation handily beats the Sk4f impl, the portable impl, and the existing SSE2 impl. Reading the SkXfermodes_opts_SSE2.cpp file, I'm pretty confident that we'll be able to beat all SSE2 impls.
I believe this impl will beat or match the existing NEON impl too, but that may not be true for more complicated xfermodes. They can take advantage of transposing ARGBARGB... to AAAARRRR.... cheaply and I haven't figured out an abstraction for that yet that doesn't screw SSE.
Adds:
- MapDstSrc() to Sk4px
- saturatedAdd() to SkNi (only implemented as far as it's used).
- div255Narrow()
BUG=skia:
Review URL: https://codereview.chromium.org/1138893002
/external/skia/src/core/Sk4px.h
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| d2ffd36eb62e99abe2920369d1e040954cc2044f |
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12-May-2015 |
mtklein <mtklein@chromium.org> |
Sk4px
Xfermode_SrcOver:
SSE: 2.08ms -> 2.03ms (~2% faster)
NEON: my N5 is noisy, but there appears to be no perf change
BUG=skia:
Review URL: https://codereview.chromium.org/1132273004
/external/skia/src/core/Sk4px.h
|