Add option to skip rects to drawImageLattice()

src/gpu/batches/GrNinePatch.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 "GrNinePatch.h"
 
 #include "GrBatchFlushState.h"
@@ skipping 64 matching lines @@
         sk_sp<GrGeometryProcessor> gp(create_gp(fOverrides.readsCoverage()));
         if (!gp) {
             SkDebugf("Couldn't create GrGeometryProcessor\n");
             return;
         }
 
         size_t vertexStride = gp->getVertexStride();
         int patchCnt = fPatches.count();
         int numRects = 0;
         for (int i = 0; i < patchCnt; i++) {
-            numRects += fPatches[i].fIter->numRects();
+            numRects += fPatches[i].fIter->numRectsToDraw();
         }
 
         SkAutoTUnref<const GrBuffer> indexBuffer(
                 target->resourceProvider()->refQuadIndexBuffer());
         InstancedHelper helper;
         void* vertices = helper.init(target, kTriangles_GrPrimitiveType, vertexStride,
                                      indexBuffer, kVertsPerRect,
                                      kIndicesPerRect, numRects);
         if (!vertices || !indexBuffer) {
             SkDebugf("Could not allocate vertices\n");
@@ skipping 29 matching lines @@
                     *vertColor = patch.fColor;
                     vertColor = (GrColor*) ((intptr_t) vertColor + vertexStride);
                 }
                 verts += kVertsPerRect * vertexStride;
             }
 
             // If we didn't handle it above, apply the matrix here.
             if (!isScaleTranslate) {
                 SkPoint* positions = reinterpret_cast<SkPoint*>(patchVerts);
                 patch.fViewMatrix.mapPointsWithStride(positions, vertexStride,
-                                                      kVertsPerRect * patch.fIter->numRects());
+                        kVertsPerRect * patch.fIter->numRectsToDraw());
             }
         }
         helper.recordDraw(target, gp.get());
     }
 
     void initBatchTracker(const GrXPOverridesForBatch& overrides) override {
         overrides.getOverrideColorIfSet(&fPatches[0].fColor);
         fOverrides = overrides;
     }
 
@@ skipping 33 matching lines @@
     typedef GrVertexBatch INHERITED;
 };
 
 namespace GrNinePatch {
 GrDrawBatch* CreateNonAA(GrColor color, const SkMatrix& viewMatrix, int imageWidth, int imageHeight,
                          std::unique_ptr<SkLatticeIter> iter, const SkRect& dst) {
     return new GrNonAANinePatchBatch(color, viewMatrix, imageWidth, imageHeight, std::move(iter),
                                      dst);
 }
 };