1385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary/*
2385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary * Copyright 2013 Google Inc.
3385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary *
4385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary * Use of this source code is governed by a BSD-style license that can be
5385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary * found in the LICENSE file.
6385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanary */
7f168b86d7fafc5c20c87bebc6fd393cb17e120catfarina#include "Benchmark.h"
8a4083c97d48e8a4f88e2797d7363f141e3d42553Cary Clark#include "SkColorData.h"
9c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org#include "SkRandom.h"
10c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org#include "SkString.h"
11c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
12c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.orgtemplate <bool kFast, bool kScale>
13f168b86d7fafc5c20c87bebc6fd393cb17e120catfarinaclass FourByteInterpBench : public Benchmark {
14c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.orgpublic:
15c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    FourByteInterpBench() {
16c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        fName.set("four_byte_interp");
17c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        fName.append(kFast ? "_fast" : "_slow");
18c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        fName.append(kScale ? "_255" : "_256");
19c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    }
20c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
2136352bf5e38f45a70ee4f4fc132a38048d38206dmtklein    bool isSuitableFor(Backend backend) override {
22c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        return backend == kNonRendering_Backend;
23c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    }
24c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
2536352bf5e38f45a70ee4f4fc132a38048d38206dmtklein    const char* onGetName() override { return fName.c_str(); }
26c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
278a6697af95b340aad6dee7e6228048fa305c1e59joshualitt    void onDelayedSetup() override {
28cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        // A handful of random srcs and dsts.
29cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        SkRandom rand;
30cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        for (int i = 0; i < kInputs; i++) {
31cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org            fSrcs[i] = SkPreMultiplyColor(rand.nextU());
32cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org            fDsts[i] = SkPreMultiplyColor(rand.nextU());
33cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        }
34cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org
35cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        // We'll exhaustively test all scales instead of using random numbers.
36cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        for (int i = 0; i <= 256; i++) {
37cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org            fScales[i] = i;
38cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        }
39cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        if (kScale) fScales[256] = 255;  // We'll just do 255 twice if we're limited to [0,255].
40cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org    }
41cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org
42a1ebeb25e9acfcd801e089e063311d716b83b8a5mtklein    void onDraw(int loops, SkCanvas*) override {
43cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        // We xor results of FourByteInterp into junk to make sure the function runs.
44c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        volatile SkPMColor junk = 0;
45cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org
46cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org        for (int loop = 0; loop < loops; loop++) {
47cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org            for (int i = 0; i < kInputs; i++) {
48cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                for (size_t j = 0; j <= 256; j++) {
49cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // Note: we really want to load src and dst here and not outside in the i-loop.
50cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // If we put the loads there, a clever compiler will do the not-insignificant
51cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // work in the FourByteInterps that depends only on src and dst outside this
52cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // loop, so we'd only be benchmarking the back half of those functions that also
53cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // depends on scale.  Even here, these must be volatile arrays to prevent that
54cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    // clever compiler from hoisting the loads out of the loop on its own.
55cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    const SkPMColor src = fSrcs[i];
56cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    const SkPMColor dst = fDsts[i];
57cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org
58cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    const unsigned scale = fScales[j];
59cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org
60cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    if (kFast && kScale) {
61cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                        junk ^= SkFastFourByteInterp(src, dst, scale);
62cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    } else if (kFast) {
63cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                        junk ^= SkFastFourByteInterp256(src, dst, scale);
64cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    } else if (kScale) {
65cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                        junk ^= SkFourByteInterp(src, dst, scale);
66cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    } else {
67cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                        junk ^= SkFourByteInterp256(src, dst, scale);
68cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org                    }
69c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org                }
70c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org            }
71c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org        }
72c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    }
73c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
74c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.orgprivate:
75c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    SkString fName;
76cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org    static const int kInputs = 10;  // Arbitrary.
77cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org    volatile unsigned fSrcs[kInputs];
78cc6db406e482914ab6abbe86aa89f0f0d4ec83c7commit-bot@chromium.org    volatile unsigned fDsts[kInputs];
79c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org    unsigned fScales[257];  // We need space for [0, 256].
80c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org};
81c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org
82c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org#define COMMA ,
83385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanaryDEF_BENCH(return (new FourByteInterpBench<true COMMA true>);)
84385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanaryDEF_BENCH(return (new FourByteInterpBench<true COMMA false>);)
85385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanaryDEF_BENCH(return (new FourByteInterpBench<false COMMA true>);)
86385fe4d4b62d7d1dd76116dd570df3290a2f487bhalcanaryDEF_BENCH(return (new FourByteInterpBench<false COMMA false>);)
87c25d2219cb34ffd06a24609b9013c514b58d58ffcommit-bot@chromium.org#undef COMMA
88