start to chip away at friending of GrAtlasTextBatch/GrAtlasTextBlob

src/gpu/batches/GrAtlasTextBatch.h

Index: src/gpu/batches/GrAtlasTextBatch.h
diff --git a/src/gpu/batches/GrAtlasTextBatch.h b/src/gpu/batches/GrAtlasTextBatch.h
index f4008c947189aaf8de1fe6585a60070a1fb80e89..05d6afdb5184a44eab6affd7c4eed2d68a9e1169 100644
--- a/src/gpu/batches/GrAtlasTextBatch.h
+++ b/src/gpu/batches/GrAtlasTextBatch.h
@@ -81,39 +81,9 @@ public:
     void init() {
         const Geometry& geo = fGeoData[0];
         fBatch.fColor = geo.fColor;
-        fBatch.fViewMatrix = geo.fBlob->fViewMatrix;
-
-        // We don't yet position distance field text on the cpu, so we have to map the vertex bounds
-        // into device space.
-        // We handle vertex bounds differently for distance field text and bitmap text because
-        // the vertex bounds of bitmap text are in device space.  If we are flushing multiple runs
-        // from one blob then we are going to pay the price here of mapping the rect for each run.
-        const Run& run = geo.fBlob->fRuns[geo.fRun];
-        SkRect bounds = run.fSubRunInfo[geo.fSubRun].vertexBounds();
-        if (run.fSubRunInfo[geo.fSubRun].drawAsDistanceFields()) {
-            // Distance field text is positioned with the (X,Y) as part of the glyph position,
-            // and currently the view matrix is applied on the GPU
-            bounds.offset(geo.fBlob->fX - geo.fBlob->fInitialX,
-                          geo.fBlob->fY - geo.fBlob->fInitialY);
-            fBatch.fViewMatrix.mapRect(&bounds);
-            this->setBounds(bounds);
-        } else {
-            // Bitmap text is fully positioned on the CPU, and offset by an (X,Y) translate in
-            // device space.
-            SkMatrix boundsMatrix = geo.fBlob->fInitialViewMatrixInverse;
-
-            boundsMatrix.postTranslate(-geo.fBlob->fInitialX, -geo.fBlob->fInitialY);
-
-            boundsMatrix.postTranslate(geo.fBlob->fX, geo.fBlob->fY);
-
-            boundsMatrix.postConcat(geo.fBlob->fViewMatrix);
-            boundsMatrix.mapRect(&bounds);
-
-            // Due to floating point numerical inaccuracies, we have to round out here
-            SkRect roundedOutBounds;
-            bounds.roundOut(&roundedOutBounds);
-            this->setBounds(roundedOutBounds);
-        }
+        fBatch.fViewMatrix = geo.fBlob->viewMatrix();
+
+        geo.fBlob->computeSubRunBounds(&fBounds, geo.fRun, geo.fSubRun);
     }
 
     const char* name() const override { return "TextBatch"; }