Create fragment processor for performing input color blend with child processor

src/effects/SkTableColorFilter.cpp

 /*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "SkBitmap.h"
 #include "SkTableColorFilter.h"
 #include "SkColorPriv.h"
@@ skipping 31 matching lines @@
         }
     }
 
     virtual ~SkTable_ColorFilter() { delete fBitmap; }
 
     bool asComponentTable(SkBitmap* table) const override;
     SkColorFilter* newComposed(const SkColorFilter* inner) const override;
 
 #if SK_SUPPORT_GPU
     bool asFragmentProcessors(GrContext*, GrProcessorDataManager*,
-                              SkTDArray<GrFragmentProcessor*>*) const override;
+                              SkTDArray<const GrFragmentProcessor*>*) const override;
 #endif
 
     void filterSpan(const SkPMColor src[], int count, SkPMColor dst[]) const override;
 
     SK_TO_STRING_OVERRIDE()
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTable_ColorFilter)
 
     enum {
         kA_Flag = 1 << 0,
@@ skipping 451 matching lines @@
     // same row.
     const ColorTableEffect& that = other.cast<ColorTableEffect>();
     SkASSERT(SkToBool(fAtlas) == SkToBool(that.fAtlas));
     // Ok to always do this comparison since both would be -1 if non-atlased.
     return fRow == that.fRow;
 }
 
 void ColorTableEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
     // If we kept the table in the effect then we could actually run known inputs through the
     // table.
-    uint8_t invalidateFlags = 0;
+    GrColorComponentFlags invalidateFlags = kNone_GrColorComponentFlags;
     if (fFlags & SkTable_ColorFilter::kR_Flag) {
         invalidateFlags |= kR_GrColorComponentFlag;
     }
     if (fFlags & SkTable_ColorFilter::kG_Flag) {
         invalidateFlags |= kG_GrColorComponentFlag;
     }
     if (fFlags & SkTable_ColorFilter::kB_Flag) {
         invalidateFlags |= kB_GrColorComponentFlag;
     }
     if (fFlags & SkTable_ColorFilter::kA_Flag) {
@@ skipping 21 matching lines @@
             }
         }
     }
     SkAutoTUnref<SkColorFilter> filter(SkTableColorFilter::CreateARGB(
         (flags & (1 << 0)) ? luts[0] : nullptr,
         (flags & (1 << 1)) ? luts[1] : nullptr,
         (flags & (1 << 2)) ? luts[2] : nullptr,
         (flags & (1 << 3)) ? luts[3] : nullptr
     ));
 
-    SkTDArray<GrFragmentProcessor*> array;
+    SkTDArray<const GrFragmentProcessor*> array;
     if (filter->asFragmentProcessors(d->fContext, d->fProcDataManager, &array)) {
         SkASSERT(1 == array.count());   // TableColorFilter only returns 1
         return array[0];
     }
     return nullptr;
 }
 
 bool SkTable_ColorFilter::asFragmentProcessors(GrContext* context,
                                                GrProcessorDataManager*,
-                                               SkTDArray<GrFragmentProcessor*>* array) const {
+                                               SkTDArray<const GrFragmentProcessor*>* array) const {
     SkBitmap bitmap;
     this->asComponentTable(&bitmap);
 
     GrFragmentProcessor* frag = ColorTableEffect::Create(context, bitmap, fFlags);
     if (frag) {
         if (array) {
             *array->append() = frag;
         } else {
             frag->unref();
             SkDEBUGCODE(frag = nullptr;)
@@ skipping 24 matching lines @@
 SkColorFilter* SkTableColorFilter::CreateARGB(const uint8_t tableA[256],
                                               const uint8_t tableR[256],
                                               const uint8_t tableG[256],
                                               const uint8_t tableB[256]) {
     return new SkTable_ColorFilter(tableA, tableR, tableG, tableB);
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkTableColorFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTable_ColorFilter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END