Draw SKPs in 256x256 tiles in nanobench.

bench/nanobench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "Benchmark.h"
@@ skipping 52 matching lines @@
 DEFINE_bool(gpuCompressAlphaMasks, false, "Compress masks generated from falling back to "
                                           "software path rendering.");
 
 DEFINE_string(outResultsFile, "", "If given, write results here as JSON.");
 DEFINE_int32(maxCalibrationAttempts, 3,
              "Try up to this many times to guess loops for a bench, or skip the bench.");
 DEFINE_int32(maxLoops, 1000000, "Never run a bench more times than this.");
 DEFINE_string(clip, "0,0,1000,1000", "Clip for SKPs.");
 DEFINE_string(scales, "1.0", "Space-separated scales for SKPs.");
 DEFINE_bool(bbh, true, "Build a BBH for SKPs?");
+DEFINE_int32(benchTile, 256, "Tile dimension used for SKP playback.");
 DEFINE_int32(flushEvery, 10, "Flush --outResultsFile every Nth run.");
 
 static SkString humanize(double ms) {
     if (FLAGS_verbose) return SkStringPrintf("%llu", (uint64_t)(ms*1e6));
     if (ms > 1e+3)     return SkStringPrintf("%.3gs",  ms/1e3);
     if (ms < 1e-3)     return SkStringPrintf("%.3gns", ms*1e6);
 #ifdef SK_BUILD_FOR_WIN
     if (ms < 1)        return SkStringPrintf("%.3gus", ms*1e3);
 #else
     if (ms < 1)        return SkStringPrintf("%.3gµs", ms*1e3);
@@ skipping 424 matching lines @@
         // Then once each for each scale as SKPBenches (playback).
         while (fCurrentScale < fScales.count()) {
             while (fCurrentSKP < fSKPs.count()) {
                 const SkString& path = fSKPs[fCurrentSKP++];
                 SkAutoTUnref<SkPicture> pic;
                 if (!ReadPicture(path.c_str(), &pic)) {
                     continue;
                 }
                 if (FLAGS_bbh) {
                     // The SKP we read off disk doesn't have a BBH.  Re-record so it grows one.
-                    // Here we use an SkTileGrid with parameters optimized for FLAGS_clip.
                     const SkTileGridFactory::TileGridInfo info = {
-                        SkISize::Make(fClip.width(), fClip.height()),  // tile interval
-                        SkISize::Make(0,0),                            // margin
-                        SkIPoint::Make(fClip.left(), fClip.top()),     // offset
+                        SkISize::Make(FLAGS_benchTile, FLAGS_benchTile),  // tile interval
+                        SkISize::Make(0,0),                               // margin
+                        SkIPoint::Make(0,0),                              // offset
                     };
                     SkTileGridFactory factory(info);
                     SkPictureRecorder recorder;
                     pic->playback(recorder.beginRecording(pic->cullRect().width(),
                                                           pic->cullRect().height(),
                                                           &factory));
                     pic.reset(recorder.endRecording());
                 }
                 SkString name = SkOSPath::Basename(path.c_str());
                 fSourceType = "skp";
@@ skipping 202 matching lines @@
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return nanobench_main();
 }
 #endif