Repeating SkBitmapProcState rounding bias

src/core/SkBitmapProcState_matrix_template.h

Index: src/core/SkBitmapProcState_matrix_template.h
diff --git a/src/core/SkBitmapProcState_matrix_template.h b/src/core/SkBitmapProcState_matrix_template.h
index 468013c30da958fda88e9cb60e53e04ad18263e2..2504a82f1d3ccf44e4137a98c588cf14ec9d4917 100644
--- a/src/core/SkBitmapProcState_matrix_template.h
+++ b/src/core/SkBitmapProcState_matrix_template.h
@@ -25,10 +25,10 @@ void NoFilterProc_Scale(const SkBitmapProcState& s, uint32_t xy[],
         SkPoint pt;
         s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
                                   SkIntToScalar(y) + SK_ScalarHalf, &pt);
-        fx = SkScalarToFractionalInt(pt.fY);
+        fx = SkScalarToFractionalInt(pt.fY) + SkFixedToFractionalInt(s.fInvBiasY);
         const unsigned maxY = s.fPixmap.height() - 1;
         *xy++ = TileProc::Y(s, SkFractionalIntToFixed(fx), maxY);
-        fx = SkScalarToFractionalInt(pt.fX);
+        fx = SkScalarToFractionalInt(pt.fX) + SkFixedToFractionalInt(s.fInvBiasX);
     }
 
     if (0 == maxX) {
@@ -85,8 +85,8 @@ void NoFilterProc_Affine(const SkBitmapProcState& s, uint32_t xy[],
                SkIntToScalar(x) + SK_ScalarHalf,
                SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
 
-    SkFractionalInt fx = SkScalarToFractionalInt(srcPt.fX);
-    SkFractionalInt fy = SkScalarToFractionalInt(srcPt.fY);
+    SkFractionalInt fx = SkScalarToFractionalInt(srcPt.fX) + SkFixedToFractionalInt(s.fInvBiasX);
+    SkFractionalInt fy = SkScalarToFractionalInt(srcPt.fY) + SkFixedToFractionalInt(s.fInvBiasY);
     SkFractionalInt dx = s.fInvSxFractionalInt;
     SkFractionalInt dy = s.fInvKyFractionalInt;
     int maxX = s.fPixmap.width() - 1;
@@ -107,6 +107,7 @@ void NoFilterProc_Persp(const SkBitmapProcState& s, uint32_t* SK_RESTRICT xy,
     int maxX = s.fPixmap.width() - 1;
     int maxY = s.fPixmap.height() - 1;
 
+    // TODO: inv bias support
     SkPerspIter   iter(s.fInvMatrix,
                        SkIntToScalar(x) + SK_ScalarHalf,
                        SkIntToScalar(y) + SK_ScalarHalf, count);