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Add class for converting Bitmaps to monochrome bytes representation

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This commit is contained in:
Moritz Martinius
2023-09-23 15:10:50 +02:00
parent 318e078de5
commit 55896d74f9
5 changed files with 113 additions and 1 deletions
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3
tests/meson.build
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@@ -1,5 +1,6 @@
tests = [['bitmap_test', 'bitmap_test_exe', ['bitmap_test/bitmap_test.cpp']],
['image_test', 'image_test_exe', ['image_test/image_test.cpp']]
['image_test', 'image_test_exe', ['image_test/image_test.cpp']],
['monochrome_test', 'monochrome_test_exe', ['monochrome_test/monochrome_test.cpp']]
]
foreach test : tests

49
tests/monochrome_test/monochrome_test.cpp Normal file
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@@ -0,0 +1,49 @@
#include "graphics/Monochrome.hpp"
#include <gtest/gtest.h>
TEST(basic_test, Monochrome_convertGrayscale_yieldsMonochrome) {
const std::vector<uint8_t> pixels({0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00});
const std::vector<uint8_t> expected({0b10101010, 0b10101010});
auto mono = ptprnt::graphics::Monochrome(pixels);
auto out = mono.get();
EXPECT_EQ(out, expected);
}
TEST(basic_test, Monochrome_convertInvertedGrayscale_yieldsInvertedMonochrome) {
const std::vector<uint8_t> pixels({0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00});
const std::vector<uint8_t> expected({0b01010101, 0b01010101});
auto mono = ptprnt::graphics::Monochrome(pixels);
mono.invert(true);
auto out = mono.get();
EXPECT_EQ(out, expected);
}
TEST(basic_test, Monochrome_convertWithCustomThreshhold_yieldsMonochromeRespectingThreshhold) {
const std::vector<uint8_t> pixels({0x0F, 0x11, 0x0F, 0x11, 0x0F, 0x11, 0x0F, 0x11, 0x0F, 0x11,
0x0F, 0x11, 0x0F, 0x11, 0x0F, 0x11});
const std::vector<uint8_t> expected({0b01010101, 0b01010101});
auto mono = ptprnt::graphics::Monochrome(pixels);
mono.setThreshold(16);
auto out = mono.get();
EXPECT_EQ(out, expected);
}
TEST(basic_test, Monochrome_convertNonAlignedPixels_spillsOverIntoNewByte) {
const std::vector<uint8_t> pixels({0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF});
const std::vector<uint8_t> expected({0b10101010, 0b10101010, 0b10000000});
auto mono = ptprnt::graphics::Monochrome(pixels);
auto out = mono.get();
EXPECT_EQ(out, expected);
}