kc3-lang/harfbuzz/perf/benchmark-shape.cc

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• Hash : 9ddf3da7
  Author :
  Date : 2025-04-04T14:21:46
  

  [benchmark-shape] Accept one variation on the cmd-line
  

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• perf/benchmark-shape.cc

• #include "hb-benchmark.hh"
  
  #define SUBSET_FONT_BASE_PATH "test/subset/data/fonts/"
  
  struct test_input_t
  {
    const char *font_path;
    const char *text_path;
  } default_tests[] =
  {
  
    {"perf/fonts/NotoNastaliqUrdu-Regular.ttf",
     "perf/texts/fa-thelittleprince.txt"},
  
    {"perf/fonts/NotoNastaliqUrdu-Regular.ttf",
     "perf/texts/fa-words.txt"},
  
    {"perf/fonts/Amiri-Regular.ttf",
     "perf/texts/fa-thelittleprince.txt"},
  
    {SUBSET_FONT_BASE_PATH "NotoSansDevanagari-Regular.ttf",
     "perf/texts/hi-words.txt"},
  
    {"perf/fonts/Roboto-Regular.ttf",
     "perf/texts/en-thelittleprince.txt"},
  
    {"perf/fonts/Roboto-Regular.ttf",
     "perf/texts/en-words.txt"},
  
    {SUBSET_FONT_BASE_PATH "SourceSerifVariable-Roman.ttf",
     "perf/texts/react-dom.txt"},
  };
  
  static test_input_t *tests = default_tests;
  static unsigned num_tests = sizeof (default_tests) / sizeof (default_tests[0]);
  const char *variation = nullptr;
  
  static void BM_Shape (benchmark::State &state,
  		      const char *shaper,
  		      const test_input_t &input)
  {
    hb_font_t *font;
    {
      hb_face_t *face = hb_benchmark_face_create_from_file_or_fail (input.font_path, 0);
      assert (face);
      font = hb_font_create (face);
      hb_face_destroy (face);
    }
  
    if (variation)
    {
      hb_variation_t var;
      hb_variation_from_string (variation, -1, &var);
      hb_font_set_variations (font, &var, 1);
    }
  
    hb_blob_t *text_blob = hb_blob_create_from_file_or_fail (input.text_path);
    assert (text_blob);
    unsigned orig_text_length;
    const char *orig_text = hb_blob_get_data (text_blob, &orig_text_length);
  
    hb_buffer_t *buf = hb_buffer_create ();
    for (auto _ : state)
    {
      unsigned text_length = orig_text_length;
      const char *text = orig_text;
  
      const char *end;
      while ((end = (const char *) memchr (text, '\n', text_length)))
      {
        hb_buffer_clear_contents (buf);
        hb_buffer_add_utf8 (buf, text, text_length, 0, end - text);
        hb_buffer_guess_segment_properties (buf);
        const char *shaper_list[] = {shaper, nullptr};
        hb_shape_full (font, buf, nullptr, 0, shaper_list);
  
        unsigned skip = end - text + 1;
        text_length -= skip;
        text += skip;
      }
    }
    hb_buffer_destroy (buf);
  
    hb_blob_destroy (text_blob);
    hb_font_destroy (font);
  }
  
  static void test_shaper (const char *shaper,
  			 const test_input_t &test_input)
  {
    char name[1024] = "BM_Shape";
    const char *p;
    strcat (name, "/");
    p = strrchr (test_input.font_path, '/');
    strcat (name, p ? p + 1 : test_input.font_path);
    strcat (name, "/");
    p = strrchr (test_input.text_path, '/');
    strcat (name, p ? p + 1 : test_input.text_path);
    strcat (name, "/");
    strcat (name, shaper);
  
    benchmark::RegisterBenchmark (name, BM_Shape, shaper, test_input)
     ->Unit(benchmark::kMillisecond);
  }
  
  int main(int argc, char** argv)
  {
    benchmark::Initialize(&argc, argv);
  
    test_input_t static_test = {};
    if (argc > 2)
    {
      static_test.font_path = argv[1];
      static_test.text_path = argv[2];
      tests = &static_test;
      num_tests = 1;
    }
    if (argc > 3)
      variation = argv[3];
  
    for (unsigned i = 0; i < num_tests; i++)
    {
      auto& test_input = tests[i];
      const char **shapers = hb_shape_list_shapers ();
      for (const char **shaper = shapers; *shaper; shaper++)
        test_shaper (*shaper, test_input);
    }
  
    benchmark::RunSpecifiedBenchmarks();
    benchmark::Shutdown();
  }
  

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