Add mixed samples support to XPs

tests/GrPorterDuffTest.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 "SkXfermode.h"
 #include "Test.h"
 
@@ skipping 57 matching lines @@
     kIgnoreCoverage_OptFlag           = GrXferProcessor::kIgnoreCoverage_OptFlag,
     kCanTweakAlphaForCoverage_OptFlag = GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag
 };
 
 class GrPorterDuffTest {
 public:
     struct XPInfo {
         XPInfo(skiatest::Reporter* reporter, SkXfermode::Mode xfermode, const GrCaps& caps,
                const GrProcOptInfo& colorPOI, const GrProcOptInfo& covPOI) {
             SkAutoTUnref<GrXPFactory> xpf(GrPorterDuffXPFactory::Create(xfermode));
-            SkAutoTUnref<GrXferProcessor> xp(xpf->createXferProcessor(colorPOI, covPOI, 0, caps));
-            TEST_ASSERT(!xpf->willNeedDstTexture(caps, colorPOI, covPOI));
+            SkAutoTUnref<GrXferProcessor> xp(
+                xpf->createXferProcessor(colorPOI, covPOI, false, NULL, caps));
+            TEST_ASSERT(!xpf->willNeedDstTexture(caps, colorPOI, covPOI, false));
             xpf->getInvariantBlendedColor(colorPOI, &fBlendedColor);
-            fOptFlags = xp->getOptimizations(colorPOI, covPOI, false, 0, caps);
+            fOptFlags = xp->getOptimizations(colorPOI, covPOI, false, NULL, caps);
             GetXPOutputTypes(xp, &fPrimaryOutputType, &fSecondaryOutputType);
             xp->getBlendInfo(&fBlendInfo);
             TEST_ASSERT(!xp->willReadDstColor());
             TEST_ASSERT(xp->hasSecondaryOutput() == GrBlendCoeffRefsSrc2(fBlendInfo.fDstBlend));
         }
 
         GrXPFactory::InvariantBlendedColor fBlendedColor;
         int fOptFlags;
         int fPrimaryOutputType;
         int fSecondaryOutputType;
@@ skipping 823 matching lines @@
     } testLCDCoverageBatch;
 
     GrProcOptInfo colorPOI, covPOI;
     colorPOI.calcColorWithBatch(&testLCDCoverageBatch, NULL, 0);
     covPOI.calcCoverageWithBatch(&testLCDCoverageBatch, NULL, 0);
 
     SkASSERT(kRGBA_GrColorComponentFlags == colorPOI.validFlags());
     SkASSERT(covPOI.isFourChannelOutput());
 
     SkAutoTUnref<GrXPFactory> xpf(GrPorterDuffXPFactory::Create(SkXfermode::kSrcOver_Mode));
-    TEST_ASSERT(!xpf->willNeedDstTexture(caps, colorPOI, covPOI));
+    TEST_ASSERT(!xpf->willNeedDstTexture(caps, colorPOI, covPOI, false));
 
-    SkAutoTUnref<GrXferProcessor> xp(xpf->createXferProcessor(colorPOI, covPOI, 0, caps));
+    SkAutoTUnref<GrXferProcessor> xp(
+        xpf->createXferProcessor(colorPOI, covPOI, false, NULL, caps));
     if (!xp) {
         ERRORF(reporter, "Failed to create an XP with LCD coverage.");
         return;
     }
 
     GrXPFactory::InvariantBlendedColor blendedColor;
     xpf->getInvariantBlendedColor(colorPOI, &blendedColor);
     TEST_ASSERT(blendedColor.fWillBlendWithDst);
     TEST_ASSERT(kNone_GrColorComponentFlags == blendedColor.fKnownColorFlags);
 
@@ skipping 49 matching lines @@
             GrProcOptInfo covPOI;
             if (!f) {
                 covPOI.calcWithInitialValues(NULL, 0, 0, kNone_GrColorComponentFlags, true);
             } else {
                 covPOI.calcWithInitialValues(NULL, 0, GrColorPackA4(255),
                                              kRGBA_GrColorComponentFlags, true);
             }
             for (int m = 0; m <= SkXfermode::kLastCoeffMode; m++) {
                 SkXfermode::Mode xfermode = static_cast<SkXfermode::Mode>(m);
                 SkAutoTUnref<GrXPFactory> xpf(GrPorterDuffXPFactory::Create(xfermode));
-                SkAutoTUnref<GrXferProcessor> xp;
-                if (xpf->willNeedDstTexture(caps, colorPOI, covPOI)) {
-                    xp.reset(xpf->createXferProcessor(colorPOI, covPOI, &fakeDstTexture, caps));
-                } else {
-                    xp.reset(xpf->createXferProcessor(colorPOI, covPOI, NULL, caps));
-                }
+                GrXferProcessor::DstTexture* dstTexture =
+                    xpf->willNeedDstTexture(caps, colorPOI, covPOI, false) ? &fakeDstTexture : 0;
+                SkAutoTUnref<GrXferProcessor> xp(
+                    xpf->createXferProcessor(colorPOI, covPOI, false, dstTexture, caps));
                 if (!xp) {
                     ERRORF(reporter, "Failed to create an XP without dual source blending.");
                     return;
                 }
                 TEST_ASSERT(!xp->hasSecondaryOutput());
                 xp->getOptimizations(colorPOI, covPOI, false, 0, caps);
                 TEST_ASSERT(!xp->hasSecondaryOutput());
             }
         }
     }
 }
 
 #endif