1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "SkCommandLineFlags.h"
9#include "SkForceLinking.h"
10#include "SkGraphics.h"
11#include "SkOSFile.h"
12#include "SkPicture.h"
13#include "SkPictureRecorder.h"
14#include "SkStream.h"
15#include "SkString.h"
16
17#include "../include/record/SkRecording.h"
18
19#include "Stats.h"
20#include "Timer.h"
21
22__SK_FORCE_IMAGE_DECODER_LINKING;
23
24DEFINE_string2(skps, r, "skps", "Directory containing SKPs to playback.");
25DEFINE_int32(samples, 10, "Gather this many samples of each picture playback.");
26DEFINE_bool(skr, false, "Play via SkRecord instead of SkPicture.");
27DEFINE_int32(tile, 1000000000, "Simulated tile size.");
28DEFINE_string(match, "", "The usual filters on file names of SKPs to bench.");
29DEFINE_string(timescale, "ms", "Print times in ms, us, or ns");
30DEFINE_int32(verbose, 0, "0: print min sample; "
31                         "1: print min, mean, max and noise indication "
32                         "2: print all samples");
33
34static double timescale() {
35    if (FLAGS_timescale.contains("us")) return 1000;
36    if (FLAGS_timescale.contains("ns")) return 1000000;
37    return 1;
38}
39
40static SkPicture* rerecord_with_tilegrid(SkPicture& src) {
41    SkTileGridFactory::TileGridInfo info;
42    info.fTileInterval.set(FLAGS_tile, FLAGS_tile);
43    info.fMargin.setEmpty();
44    info.fOffset.setZero();
45    SkTileGridFactory factory(info);
46
47    SkPictureRecorder recorder;
48    src.draw(recorder.beginRecording(src.width(), src.height(), &factory));
49    return recorder.endRecording();
50}
51
52static EXPERIMENTAL::SkPlayback* rerecord_with_skr(SkPicture& src) {
53    EXPERIMENTAL::SkRecording recording(src.width(), src.height());
54    src.draw(recording.canvas());
55    return recording.releasePlayback();
56}
57
58static void draw(const EXPERIMENTAL::SkPlayback& skr, const SkPicture& skp, SkCanvas* canvas) {
59    if (FLAGS_skr) {
60        skr.draw(canvas);
61    } else {
62        skp.draw(canvas);
63    }
64}
65
66static void bench(SkPMColor* scratch, SkPicture& src, const char* name) {
67    SkAutoTUnref<SkPicture> picture(rerecord_with_tilegrid(src));
68    SkAutoTDelete<EXPERIMENTAL::SkPlayback> record(rerecord_with_skr(src));
69
70    SkAutoTDelete<SkCanvas> canvas(SkCanvas::NewRasterDirectN32(src.width(),
71                                                                src.height(),
72                                                                scratch,
73                                                                src.width() * sizeof(SkPMColor)));
74    canvas->clipRect(SkRect::MakeWH(SkIntToScalar(FLAGS_tile), SkIntToScalar(FLAGS_tile)));
75
76    // Draw once to warm any caches.  The first sample otherwise can be very noisy.
77    draw(*record, *picture, canvas.get());
78
79    WallTimer timer;
80    const double scale = timescale();
81    SkAutoTMalloc<double> samples(FLAGS_samples);
82    for (int i = 0; i < FLAGS_samples; i++) {
83        // We assume timer overhead (typically, ~30ns) is insignificant
84        // compared to draw runtime (at least ~100us, usually several ms).
85        timer.start();
86        draw(*record, *picture, canvas.get());
87        timer.end();
88        samples[i] = timer.fWall * scale;
89    }
90
91    Stats stats(samples.get(), FLAGS_samples);
92    if (FLAGS_verbose == 0) {
93        printf("%g\t%s\n", stats.min, name);
94    } else if (FLAGS_verbose == 1) {
95        // Get a rough idea of how noisy the measurements were.
96        const double noisePercent = 100 * sqrt(stats.var) / stats.mean;
97        printf("%g\t%g\t%g\t±%.0f%%\t%s\n", stats.min, stats.mean, stats.max, noisePercent, name);
98    } else if (FLAGS_verbose == 2) {
99        printf("%s", name);
100        for (int i = 0; i < FLAGS_samples; i++) {
101            printf("\t%g", samples[i]);
102        }
103        printf("\n");
104    }
105}
106
107int tool_main(int argc, char** argv);
108int tool_main(int argc, char** argv) {
109    SkCommandLineFlags::Parse(argc, argv);
110    SkAutoGraphics autoGraphics;
111
112    // We share a single scratch bitmap among benches to reduce the profile noise from allocation.
113    static const int kMaxArea = 209825221;  // tabl_mozilla is this big.
114    SkAutoTMalloc<SkPMColor> scratch(kMaxArea);
115
116    SkOSFile::Iter it(FLAGS_skps[0], ".skp");
117    SkString filename;
118    bool failed = false;
119    while (it.next(&filename)) {
120        if (SkCommandLineFlags::ShouldSkip(FLAGS_match, filename.c_str())) {
121            continue;
122        }
123
124        const SkString path = SkOSPath::SkPathJoin(FLAGS_skps[0], filename.c_str());
125
126        SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path.c_str()));
127        if (!stream) {
128            SkDebugf("Could not read %s.\n", path.c_str());
129            failed = true;
130            continue;
131        }
132        SkAutoTUnref<SkPicture> src(SkPicture::CreateFromStream(stream));
133        if (!src) {
134            SkDebugf("Could not read %s as an SkPicture.\n", path.c_str());
135            failed = true;
136            continue;
137        }
138
139        if (src->width() * src->height() > kMaxArea) {
140            SkDebugf("%s (%dx%d) is larger than hardcoded scratch bitmap (%dpx).\n",
141                     path.c_str(), src->width(), src->height(), kMaxArea);
142            failed = true;
143            continue;
144        }
145
146        bench(scratch.get(), *src, filename.c_str());
147    }
148    return failed ? 1 : 0;
149}
150
151#if !defined SK_BUILD_FOR_IOS
152int main(int argc, char * const argv[]) {
153    return tool_main(argc, (char**) argv);
154}
155#endif
156