Use child processors to implement compose color filter.

tests/GpuColorFilterTest.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorFilter.h"
 #include "Test.h"
@@ skipping 82 matching lines @@
         // A color with unknown alpha filtered with DstOver produces an unknown color.
         { kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, 0    , gr_black},
 
         // An unknown color with known alpha and red component filtered with Multiply produces an unknown color with known red and alpha.
         { kR|kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kModulate_Mode, kR|kA, GrColorPackRGBA(50, 0, 0, 64) }
     };
 
     GrPaint paint;
     for (size_t i = 0; i < SK_ARRAY_COUNT(filterTests); ++i) {
         const GetConstantComponentTestCase& test = filterTests[i];
-        SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(test.filterColor, test.filterMode));
-        SkTDArray<const GrFragmentProcessor*> array;
-        bool hasFrag = cf->asFragmentProcessors(grContext, paint.getProcessorDataManager(), &array);
-        REPORTER_ASSERT(reporter, hasFrag);
-        REPORTER_ASSERT(reporter, 1 == array.count());
+        SkAutoTUnref<SkColorFilter> cf(
+            SkColorFilter::CreateModeFilter(test.filterColor, test.filterMode));
+        SkAutoTUnref<const GrFragmentProcessor> fp(
+            cf->asFragmentProcessor(grContext, paint.getProcessorDataManager()));
+        REPORTER_ASSERT(reporter, fp);
         GrInvariantOutput inout(test.inputColor,
                                 static_cast<GrColorComponentFlags>(test.inputComponents),
                                 false);
-        array[0]->computeInvariantOutput(&inout);
-
-        REPORTER_ASSERT(reporter, filterColor(inout.color(), inout.validFlags()) == test.outputColor);
+        fp->computeInvariantOutput(&inout);
+        REPORTER_ASSERT(reporter, filterColor(inout.color(), inout.validFlags()) ==
+                                  test.outputColor);
         REPORTER_ASSERT(reporter, test.outputComponents == inout.validFlags());
-        array[0]->unref();
     }
 }
 
 DEF_GPUTEST(GpuColorFilter, reporter, factory) {
     for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
         GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
 
         GrContext* grContext = factory->get(glType);
         if (nullptr == grContext) {
             continue;
         }
 
         test_getConstantColorComponents(reporter, grContext);
     }
 }
 
 #endif