Add drawBitmapLattice() API

bench/DrawLatticeBench.cpp

+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#include "Benchmark.h"
+#include "SkCanvas.h"
+#include "SkRect.h"
+#include "SkString.h"
+
+class DrawLatticeBench : public Benchmark {
+public:
+    DrawLatticeBench(int* xDivs, int xCount, int* yDivs, int yCount, const SkISize& srcSize,
+                     const SkRect& dst, const char* desc)
+        : fSrcSize(srcSize)
+        , fDst(dst)
+    {
+        fLattice.fXDivs = xDivs;
+        fLattice.fXCount = xCount;
+        fLattice.fYDivs = yDivs;
+        fLattice.fYCount = yCount;
+
+        fName = SkStringPrintf("DrawLattice_%s", desc);
+    }
+
+    const char* onGetName() override {
+        return fName.c_str();
+    }
+
+    bool isSuitableFor(Backend backend) override {
+        return kRaster_Backend == backend || kGPU_Backend == backend;
+    }
+
+    void onDelayedSetup() override {
+        fBitmap.allocN32Pixels(fSrcSize.width(), fSrcSize.height());
+        fBitmap.eraseColor(0x880000FF);
+    }
+
+    void onDraw(int loops, SkCanvas* canvas) override {
+        for (int i = 0; i < loops; i++) {
+            canvas->drawBitmapLattice(fBitmap, fLattice, fDst);
+        }
+    }
+
+private:
+    SkISize           fSrcSize;
+    SkCanvas::Lattice fLattice;
+    SkRect            fDst;
+    SkString          fName;
+    SkBitmap          fBitmap;
+
+    typedef Benchmark INHERITED;
+};
+
+static int gDivs[2] = { 250, 750, };
+DEF_BENCH(return new DrawLatticeBench(gDivs, 2, gDivs, 2, SkISize::Make(1000, 1000),
+                                      SkRect::MakeWH(4000.0f, 4000.0f), "StandardNine");)