Use rounding to 8888 in lighting filters, raster path.

src/effects/SkLightingImageFilter.cpp

 /*
  * Copyright 2012 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 "SkLightingImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 46 matching lines @@
 
 class DiffuseLightingType {
 public:
     DiffuseLightingType(SkScalar kd)
         : fKD(kd) {}
     SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const {
         SkScalar colorScale = SkScalarMul(fKD, normal.dot(surfaceTolight));
         colorScale = SkScalarClampMax(colorScale, SK_Scalar1);
         SkPoint3 color(lightColor * colorScale);
         return SkPackARGB32(255,
-                            SkClampMax(SkScalarFloorToInt(color.fX), 255),
-                            SkClampMax(SkScalarFloorToInt(color.fY), 255),
-                            SkClampMax(SkScalarFloorToInt(color.fZ), 255));
+                            SkClampMax(SkScalarRoundToInt(color.fX), 255),
+                            SkClampMax(SkScalarRoundToInt(color.fY), 255),
+                            SkClampMax(SkScalarRoundToInt(color.fZ), 255));
     }
 private:
     SkScalar fKD;
 };
 
 class SpecularLightingType {
 public:
     SpecularLightingType(SkScalar ks, SkScalar shininess)
         : fKS(ks), fShininess(shininess) {}
     SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const {
         SkPoint3 halfDir(surfaceTolight);
         halfDir.fZ += SK_Scalar1;        // eye position is always (0, 0, 1)
         halfDir.normalize();
         SkScalar colorScale = SkScalarMul(fKS,
             SkScalarPow(normal.dot(halfDir), fShininess));
         colorScale = SkScalarClampMax(colorScale, SK_Scalar1);
         SkPoint3 color(lightColor * colorScale);
-        return SkPackARGB32(SkClampMax(SkScalarFloorToInt(color.maxComponent()), 255),
-                            SkClampMax(SkScalarFloorToInt(color.fX), 255),
-                            SkClampMax(SkScalarFloorToInt(color.fY), 255),
-                            SkClampMax(SkScalarFloorToInt(color.fZ), 255));
+        return SkPackARGB32(SkClampMax(SkScalarRoundToInt(color.maxComponent()), 255),
+                            SkClampMax(SkScalarRoundToInt(color.fX), 255),
+                            SkClampMax(SkScalarRoundToInt(color.fY), 255),
+                            SkClampMax(SkScalarRoundToInt(color.fZ), 255));
     }
 private:
     SkScalar fKS;
     SkScalar fShininess;
 };
 
 inline SkScalar sobel(int a, int b, int c, int d, int e, int f, SkScalar scale) {
     return SkScalarMul(SkIntToScalar(-a + b - 2 * c + 2 * d -e + f), scale);
 }
 
@@ skipping 1514 matching lines @@
 
     builder->fsCodeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight);
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END