diff options
author | 2015-06-29 12:16:26 -0700 | |
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committer | 2015-06-29 12:16:26 -0700 | |
commit | 823b2a76e24bcac23e984dff025a7d53fc4aa584 (patch) | |
tree | 2f56a73373409dca67535e710ac0eba8d7f7a5d8 /src/core/Sk4pxXfermode.h | |
parent | b743c6679abeeeab998a1147fd6aefd3b4d1fcd9 (diff) |
SoftLight with SkPMFloat
SSE speeds up about 4.5x over existing integer SSE,
NEON speeds up about 3x over serial integer code.
We expect 1-2 bit component diffs in the usual GMs.
Still guarded by SK_SUPPORT_LEGACY_XFERMODES,
which I'll now try to lift in Chrome.
BUG=skia:
Committed: https://skia.googlesource.com/skia/+/3e47d49b46b3ab62071218ef3dd44642c9713e04
CQ_EXTRA_TRYBOTS=client.skia:Test-ChromeOS-GCC-Daisy-CPU-NEON-Arm7-Debug-Trybot
Review URL: https://codereview.chromium.org/1221493002
Diffstat (limited to 'src/core/Sk4pxXfermode.h')
-rw-r--r-- | src/core/Sk4pxXfermode.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/core/Sk4pxXfermode.h b/src/core/Sk4pxXfermode.h index e40d2ebb30..98b0bd901f 100644 --- a/src/core/Sk4pxXfermode.h +++ b/src/core/Sk4pxXfermode.h @@ -141,6 +141,31 @@ XFERMODE(ColorBurn) { otherwise)); return srcover * SkPMFloat(1,0,0,0) + colors * SkPMFloat(0,1,1,1); } +XFERMODE(SoftLight) { + auto sa = s.alphas(), + da = d.alphas(), + isa = Sk4f(1)-sa, + ida = Sk4f(1)-da; + + // Some common terms. + auto m = (da > Sk4f(0)).thenElse(d / da, Sk4f(0)), + s2 = Sk4f(2)*s, + m4 = Sk4f(4)*m; + + // The logic forks three ways: + // 1. dark src? + // 2. light src, dark dst? + // 3. light src, light dst? + auto darkSrc = d*(sa + (s2 - sa)*(Sk4f(1) - m)), // Used in case 1. + darkDst = (m4*m4 + m4)*(m - Sk4f(1)) + Sk4f(7)*m, // Used in case 2. + liteDst = m.sqrt() - m, // Used in case 3. + liteSrc = d*sa + da*(s2-sa)*(Sk4f(4)*d <= da).thenElse(darkDst, liteDst); // Case 2 or 3? + + auto alpha = s + d*isa; + auto colors = s*ida + d*isa + (s2 <= sa).thenElse(darkSrc, liteSrc); // Case 1 or 2/3? + + return alpha * SkPMFloat(1,0,0,0) + colors * SkPMFloat(0,1,1,1); +} #undef XFERMODE // A reasonable fallback mode for doing AA is to simply apply the transfermode first, @@ -244,6 +269,7 @@ static SkProcCoeffXfermode* SkCreate4pxXfermode(const ProcCoeff& rec, SkXfermode case SkXfermode::kColorDodge_Mode: return SkTPMFloatXfermode<ColorDodge>::Create(rec); case SkXfermode::kColorBurn_Mode: return SkTPMFloatXfermode<ColorBurn>::Create(rec); + case SkXfermode::kSoftLight_Mode: return SkTPMFloatXfermode<SoftLight>::Create(rec); #endif default: break; } |