Consolidate handling of infinitely thin primitives and aa bloat handing WRT batch bounds

src/gpu/batches/GrAAHairLinePathRenderer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAAHairLinePathRenderer.h"
 
 #include "GrBatchFlushState.h"
@@ skipping 665 matching lines @@
 public:
     DEFINE_BATCH_CLASS_ID
 
     AAHairlineBatch(GrColor color,
                     uint8_t coverage,
                     const SkMatrix& viewMatrix,
                     const SkPath& path,
                     SkIRect devClipBounds) : INHERITED(ClassID()) {
         fGeoData.emplace_back(Geometry{color, coverage, viewMatrix, path, devClipBounds});
 
-        // compute bounds
-        fBounds = path.getBounds();
-        viewMatrix.mapRect(&fBounds);
-
-        // This is b.c. hairlines are notionally infinitely thin so without expansion
-        // two overlapping lines could be reordered even though they hit the same pixels.
-        fBounds.outset(0.5f, 0.5f);
+        this->setTransformedBounds(path.getBounds(), viewMatrix, HasAABloat::kYes,
+                                   IsZeroArea::kYes);
     }
 
     const char* name() const override { return "AAHairlineBatch"; }
 
     void computePipelineOptimizations(GrInitInvariantOutput* color,
                                       GrInitInvariantOutput* coverage,
                                       GrBatchToXPOverrides* overrides) const override {
         // When this is called on a batch, there is only one geometry bundle
         color->setKnownFourComponents(fGeoData[0].fColor);
         coverage->setUnknownSingleComponent();
@@ skipping 49 matching lines @@
         if (this->color() != that->color()) {
             return false;
         }
 
         SkASSERT(this->usesLocalCoords() == that->usesLocalCoords());
         if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
             return false;
         }
 
         fGeoData.push_back_n(that->fGeoData.count(), that->fGeoData.begin());
-        this->joinBounds(that->bounds());
+        this->joinBounds(*that);
         return true;
     }
 
     GrColor color() const { return fBatch.fColor; }
     uint8_t coverage() const { return fBatch.fCoverage; }
     bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
     const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; }
     bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
 
 
@@ skipping 213 matching lines @@
 DRAW_BATCH_TEST_DEFINE(AAHairlineBatch) {
     GrColor color = GrRandomColor(random);
     SkMatrix viewMatrix = GrTest::TestMatrix(random);
     SkPath path = GrTest::TestPath(random);
     SkIRect devClipBounds;
     devClipBounds.setEmpty();
     return create_hairline_batch(color, viewMatrix, path, GrStyle::SimpleHairline(), devClipBounds);
 }
 
 #endif