skia2/bench/SkRasterPipelineBench.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 "SkOpts.h"
#include "SkRasterPipeline.h"

static const int N = 1023;

static uint64_t dst[N];  // sRGB or F16
static uint32_t src[N];  // sRGB
static uint8_t mask[N];  // 8-bit linear

// We'll build up a somewhat realistic useful pipeline:
//   - load srgb src
//   - scale src by 8-bit mask
//   - load srgb/f16 dst
//   - src = srcover(dst, src)
//   - store src back as srgb/f16

template <bool kF16>
class SkRasterPipelineBench : public Benchmark {
public:
    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
    const char* onGetName() override {
        return kF16 ? "SkRasterPipeline_f16"
                    : "SkRasterPipeline_srgb";
    }

    void onDraw(int loops, SkCanvas*) override {
        while (loops --> 0) {
            SkRasterPipeline p;
            p.append(SkRasterPipeline::load_s_srgb, src);
            p.append(SkRasterPipeline::   scale_u8, mask);
            p.append(kF16 ? SkRasterPipeline::load_d_f16
                          : SkRasterPipeline::load_d_srgb, dst);
            p.append(SkRasterPipeline::    srcover);
            p.append(kF16 ? SkRasterPipeline::store_f16
                          : SkRasterPipeline::store_srgb, dst);
            p.run(N);
        }
    }
};
DEF_BENCH( return new SkRasterPipelineBench<true>; )
DEF_BENCH( return new SkRasterPipelineBench<false>; )