lots of sRGB and F16 blits

src/core/SkXfermode.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkXfermode.h"
 #include "SkXfermode_proccoeff.h"
 #include "SkColorPriv.h"
@@ skipping 77 matching lines @@
 static Sk4f multiply_4f(const Sk4f& s, const Sk4f& d) {
     return s * inv_alpha(d) + d * inv_alpha(s) + s * d;
 }
 
 static Sk4f overlay_4f(const Sk4f& s, const Sk4f& d) {
     Sk4f sa = alpha(s);
     Sk4f da = alpha(d);
     Sk4f two = Sk4f(2);
     Sk4f rc = (two * d <= da).thenElse(two * s * d,
                                        sa * da - two * (da - d) * (sa - s));
-    return s + d - s * da + color_alpha(rc - d * sa, 0);
+    return pin_1(s + d - s * da + color_alpha(rc - d * sa, 0));
 }
 
 static Sk4f hardlight_4f(const Sk4f& s, const Sk4f& d) {
     return overlay_4f(d, s);
 }
 
 static Sk4f darken_4f(const Sk4f& s, const Sk4f& d) {
     Sk4f sa = alpha(s);
     Sk4f da = alpha(d);
     return s + d - Sk4f::Max(s * da, d * sa);
@@ skipping 1227 matching lines @@
 }
 
 SkXfermodeProc4f SkXfermode::GetProc4f(Mode mode) {
     SkXfermodeProc4f  proc = nullptr;
     if ((unsigned)mode < kModeCount) {
         proc = gProcCoeffs[mode].fProc4f;
     }
     return proc;
 }
 
+static SkPM4f missing_proc4f(const SkPM4f& src, const SkPM4f& dst) {
+    return src;
+}
+
+SkXfermodeProc4f SkXfermode::getProc4f() const {
+    Mode mode;
+    return this->asMode(&mode) ? GetProc4f(mode) : missing_proc4f;
+}
+
 bool SkXfermode::ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst) {
     SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount);
 
     if ((unsigned)mode >= (unsigned)kModeCount) {
         // illegal mode parameter
         return false;
     }
 
     const ProcCoeff& rec = gProcCoeffs[mode];
 
@@ skipping 44 matching lines @@
     if (!xfer) {
         return SkXfermode::kOpaque_SrcColorOpacity == opacityType;
     }
 
     return xfer->isOpaque(opacityType);
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END