Quelle  splines_gbench.cc

// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include <cstddef>
#include <vector>

#include "benchmark/benchmark.h"
#include "lib/jxl/base/rect.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/chroma_from_luma.h"
#include "lib/jxl/image_ops.h"
#include "lib/jxl/splines.h"
#include "tools/no_memory_manager.h"

namespace jxl {
namespace {

#define QUIT(M)           \
  state.SkipWithError(M); \
  return;

#define BM_CHECK(C) \
  if (!(C)) {       \
    QUIT(#C)        \
  }

constexpr int kQuantizationAdjustment = 0;
const ColorCorrelation color_correlation{};
const float kYToX = color_correlation.YtoXRatio(0);
const float kYToB = color_correlation.YtoBRatio(0);

void BM_Splines(benchmark::State& state) {
  const size_t n = state.range();

  Spline spline1{
      /*control_points=*/{
          {9, 54}, {118, 159}, {97, 3}, {10, 40}, {150, 25}, {120, 300}},
      /*color_dct=*/
      {Dct32{0.03125f, 0.00625f, 0.003125f}, Dct32{1.f, 0.321875f},
       Dct32{1.f, 0.24375f}},
      /*sigma_dct=*/{0.3125f, 0.f, 0.f, 0.0625f}};
  std::vector<Spline> spline_data = {spline1};
  std::vector<QuantizedSpline> quantized_splines;
  std::vector<Spline::Point> starting_points;
  for (const Spline& spline : spline_data) {
    JXL_ASSIGN_OR_QUIT(
        QuantizedSpline qspline,
        QuantizedSpline::Create(spline, kQuantizationAdjustment, kYToX, kYToB),
        "Failed to create spline.");
    quantized_splines.emplace_back(std::move(qspline));
    starting_points.push_back(spline.control_points.front());
  }
  Splines splines(kQuantizationAdjustment, std::move(quantized_splines),
                  std::move(starting_points));

  JXL_ASSIGN_OR_QUIT(
      Image3F drawing_area,
      Image3F::Create(jpegxl::tools::NoMemoryManager(), 320, 320),
      "Failed to allocate drawing plane.");
  ZeroFillImage(&drawing_area);
  for (auto _ : state) {
    (void)_;
    for (size_t i = 0; i < n; ++i) {
      BM_CHECK(splines.InitializeDrawCache(
          drawing_area.xsize(), drawing_area.ysize(), color_correlation));
      splines.AddTo(&drawing_area, Rect(drawing_area));
    }
  }

  state.SetItemsProcessed(n * state.iterations());
}

BENCHMARK(BM_Splines)->Range(1, 1 << 10);

}  // namespace
}  // namespace jxl