change colorfilter to return an array of frag processors

src/effects/SkColorFilters.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 "SkBlitRow.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
@@ skipping 348 matching lines @@
 
     // pick a random premul color
     uint8_t alpha = rand->nextULessThan(256);
     GrColor color = GrColorPackRGBA(rand->nextRangeU(0, alpha),
                                     rand->nextRangeU(0, alpha),
                                     rand->nextRangeU(0, alpha),
                                     alpha);
     return ModeColorFilterEffect::Create(color, mode);
 }
 
-GrFragmentProcessor* SkModeColorFilter::asFragmentProcessor(GrContext*) const {
+bool SkModeColorFilter::asFragmentProcessors(GrContext*,
+                                             SkTDArray<GrFragmentProcessor*>* array) const {
     if (SkXfermode::kDst_Mode != fMode) {
-        return ModeColorFilterEffect::Create(SkColor2GrColor(fColor), fMode);
+        GrFragmentProcessor* frag = ModeColorFilterEffect::Create(SkColor2GrColor(fColor), fMode);
+        if (frag) {
+            if (array) {
+                *array->append() = frag;
+            }
+            return true;
+        }
     }
-    return NULL;
+    return false;
 }
 
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class Src_SkModeColorFilter : public SkModeColorFilter {
 public:
     Src_SkModeColorFilter(SkColor color) : INHERITED(color, SkXfermode::kSrc_Mode) {}
 
@@ skipping 115 matching lines @@
                     byte_to_scale(SkColorGetG(mul)),
                     byte_to_scale(SkColorGetB(mul)),
                     1);
     matrix.postTranslate(SkIntToScalar(SkColorGetR(add)),
                          SkIntToScalar(SkColorGetG(add)),
                          SkIntToScalar(SkColorGetB(add)),
                          0);
     return SkColorMatrixFilter::Create(matrix);
 }