Start canonicalizing color for all A8 textblobs

src/core/SkPaint.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 "SkPaint.h"
 #include "SkAnnotation.h"
 #include "SkAutoKern.h"
@@ skipping 1273 matching lines @@
     }
     if (paint.getColorFilter()) {
         c = paint.getColorFilter()->filterColor(c);
     }
     if (color) {
         *color = c;
     }
     return true;
 }
 
-static SkColor computeLuminanceColor(const SkPaint& paint) {
+SkColor SkPaint::computeLuminanceColor() const {
     SkColor c;
-    if (!justAColor(paint, &c)) {
+    if (!justAColor(*this, &c)) {
         c = SkColorSetRGB(0x7F, 0x80, 0x7F);
     }
     return c;
 }
 
 #define assert_byte(x)  SkASSERT(0 == ((x) >> 8))
 
 // Beyond this size, LCD doesn't appreciably improve quality, but it always
 // cost more RAM and draws slower, so we set a cap.
 #ifndef SK_MAX_SIZE_FOR_LCDTEXT
@@ skipping 149 matching lines @@
         flags |= SkScalerContext::kVertical_Flag;
     }
     if (paint.getFlags() & SkPaint::kGenA8FromLCD_Flag) {
         flags |= SkScalerContext::kGenA8FromLCD_Flag;
     }
     rec->fFlags = SkToU16(flags);
 
     // these modify fFlags, so do them after assigning fFlags
     rec->setHinting(computeHinting(paint));
 
-    rec->setLuminanceColor(computeLuminanceColor(paint));
+    rec->setLuminanceColor(paint.computeLuminanceColor());
 
     if (NULL == deviceProperties) {
         rec->setDeviceGamma(SK_GAMMA_EXPONENT);
         rec->setPaintGamma(SK_GAMMA_EXPONENT);
     } else {
         rec->setDeviceGamma(deviceProperties->gamma());
 
         //For now always set the paint gamma equal to the device gamma.
         //The math in SkMaskGamma can handle them being different,
         //but it requires superluminous masks when
@@ skipping 953 matching lines @@
 }
 
 uint32_t SkPaint::getHash() const {
     // We're going to hash 10 pointers and 7 32-bit values, finishing up with fBitfields,
     // so fBitfields should be 10 pointers and 6 32-bit values from the start.
     SK_COMPILE_ASSERT(offsetof(SkPaint, fBitfields) == 10 * sizeof(void*) + 6 * sizeof(uint32_t),
                       SkPaint_notPackedTightly);
     return SkChecksum::Murmur3(reinterpret_cast<const uint32_t*>(this),
                                offsetof(SkPaint, fBitfields) + sizeof(fBitfields));
 }