Function TEST_P

src/colmap/sensor/bitmap_test.cc:987–1026

                     /*supports_grey_alpha=*/bool>> {};

TEST_P(ParameterizedBitmapFormatTests, ReadWriteRGB) {
  const auto [kExtension,
              kIsLossless,
              kSupportsNativeGrey,
              kSupportsRGBA,
              kSupportsGreyAlpha] = GetParam();

  constexpr int kWidth = 4;
  constexpr int kHeight = 3;
  Bitmap write_bitmap(kWidth, kHeight, /*as_rgb=*/true);
  for (int y = 0; y < kHeight; ++y) {
    for (int x = 0; x < kWidth; ++x) {
      const uint8_t r = static_cast<uint8_t>((x + y * kWidth) * 20);
      const uint8_t g = static_cast<uint8_t>((x + y * kWidth) * 15);
      const uint8_t b = static_cast<uint8_t>((x + y * kWidth) * 10);
      write_bitmap.SetPixel(x, y, BitmapColor<uint8_t>(r, g, b));
    }
  }

  const auto filename = CreateTestDir() / ("image" + kExtension);
  EXPECT_TRUE(write_bitmap.Write(filename));

  Bitmap rgb_bitmap;
  EXPECT_TRUE(rgb_bitmap.Read(filename));
  EXPECT_EQ(rgb_bitmap.Width(), kWidth);
  EXPECT_EQ(rgb_bitmap.Height(), kHeight);
  EXPECT_EQ(rgb_bitmap.Channels(), 3);
  EXPECT_EQ(rgb_bitmap.BitsPerPixel(), 24);

  if (kIsLossless) {
    EXPECT_EQ(rgb_bitmap.RowMajorData(), write_bitmap.RowMajorData());
  }

  Bitmap grey_bitmap;
  EXPECT_TRUE(grey_bitmap.Read(filename, /*as_rgb=*/false));
  EXPECT_EQ(grey_bitmap.Width(), kWidth);
  EXPECT_EQ(grey_bitmap.Height(), kHeight);
  EXPECT_EQ(grey_bitmap.Channels(), 1);
  EXPECT_EQ(grey_bitmap.BitsPerPixel(), 8);
}

TEST_P(ParameterizedBitmapFormatTests, ReadWriteGrey) {
  const auto [kExtension,