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450 lines
15 KiB
C++
450 lines
15 KiB
C++
#include <SFML/Graphics/Image.hpp>
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// Other 1st party headers
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#include <SFML/System/FileInputStream.hpp>
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#include <catch2/catch_test_macros.hpp>
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#include <GraphicsUtil.hpp>
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#include <array>
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#include <type_traits>
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TEST_CASE("[Graphics] sf::Image")
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{
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SECTION("Type traits")
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{
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STATIC_CHECK(!std::is_default_constructible_v<sf::Image>);
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STATIC_CHECK(std::is_copy_constructible_v<sf::Image>);
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STATIC_CHECK(std::is_copy_assignable_v<sf::Image>);
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STATIC_CHECK(std::is_nothrow_move_constructible_v<sf::Image>);
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STATIC_CHECK(std::is_nothrow_move_assignable_v<sf::Image>);
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}
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SECTION("Construction")
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{
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SECTION("Vector2 constructor")
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{
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const sf::Image image(sf::Vector2u(10, 10));
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CHECK(image.getSize() == sf::Vector2u(10, 10));
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CHECK(image.getPixelsPtr() != nullptr);
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image.getPixel(sf::Vector2u(i, j)) == sf::Color::Black);
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}
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}
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}
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SECTION("Vector2 and color constructor")
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{
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const sf::Image image(sf::Vector2u(10, 10), sf::Color::Red);
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CHECK(image.getSize() == sf::Vector2u(10, 10));
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CHECK(image.getPixelsPtr() != nullptr);
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image.getPixel(sf::Vector2u(i, j)) == sf::Color::Red);
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}
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}
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}
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SECTION("Vector2 and std::uint8_t* constructor")
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{
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// 10 x 10, with 4 color channels array
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std::array<std::uint8_t, 400> pixels{};
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for (std::size_t i = 0; i < pixels.size(); i += 4)
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{
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pixels[i] = 255; // r
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pixels[i + 1] = 0; // g
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pixels[i + 2] = 0; // b
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pixels[i + 3] = 255; // a
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}
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const sf::Image image(sf::Vector2u(10, 10), pixels.data());
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CHECK(image.getSize() == sf::Vector2u(10, 10));
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CHECK(image.getPixelsPtr() != nullptr);
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image.getPixel(sf::Vector2u(i, j)) == sf::Color::Red);
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}
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}
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}
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}
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SECTION("loadFromFile()")
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{
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SECTION("Invalid file")
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{
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CHECK(!sf::Image::loadFromFile("."));
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CHECK(!sf::Image::loadFromFile("this/does/not/exist.jpg"));
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}
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SECTION("Successful load")
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{
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std::optional<sf::Image> image;
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SECTION("bmp")
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{
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image = sf::Image::loadFromFile("Graphics/sfml-logo-big.bmp").value();
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REQUIRE(image.has_value());
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CHECK(image->getPixel({0, 0}) == sf::Color::White);
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CHECK(image->getPixel({200, 150}) == sf::Color(144, 208, 62));
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}
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SECTION("png")
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{
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image = sf::Image::loadFromFile("Graphics/sfml-logo-big.png").value();
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REQUIRE(image.has_value());
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CHECK(image->getPixel({0, 0}) == sf::Color(255, 255, 255, 0));
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CHECK(image->getPixel({200, 150}) == sf::Color(144, 208, 62));
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}
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SECTION("jpg")
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{
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image = sf::Image::loadFromFile("Graphics/sfml-logo-big.jpg").value();
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REQUIRE(image.has_value());
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CHECK(image->getPixel({0, 0}) == sf::Color::White);
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CHECK(image->getPixel({200, 150}) == sf::Color(144, 208, 62));
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}
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SECTION("gif")
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{
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image = sf::Image::loadFromFile("Graphics/sfml-logo-big.gif").value();
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REQUIRE(image.has_value());
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CHECK(image->getPixel({0, 0}) == sf::Color::White);
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CHECK(image->getPixel({200, 150}) == sf::Color(146, 210, 62));
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}
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SECTION("psd")
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{
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image = sf::Image::loadFromFile("Graphics/sfml-logo-big.psd").value();
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REQUIRE(image.has_value());
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CHECK(image->getPixel({0, 0}) == sf::Color::White);
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CHECK(image->getPixel({200, 150}) == sf::Color(144, 208, 62));
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}
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CHECK(image->getSize() == sf::Vector2u(1001, 304));
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CHECK(image->getPixelsPtr() != nullptr);
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}
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}
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SECTION("loadFromMemory()")
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{
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SECTION("Invalid pointer")
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{
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CHECK(!sf::Image::loadFromMemory(nullptr, 1));
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}
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SECTION("Invalid size")
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{
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const std::byte testByte{0xAB};
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CHECK(!sf::Image::loadFromMemory(&testByte, 0));
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}
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SECTION("Failed load")
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{
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std::vector<std::uint8_t> memory;
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SECTION("Empty")
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{
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memory.clear();
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}
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SECTION("Junk data")
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{
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memory = {1, 2, 3, 4};
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}
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CHECK(!sf::Image::loadFromMemory(memory.data(), memory.size()));
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}
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SECTION("Successful load")
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{
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const auto memory = sf::Image({24, 24}, sf::Color::Green).saveToMemory("png").value();
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const auto image = sf::Image::loadFromMemory(memory.data(), memory.size()).value();
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CHECK(image.getSize() == sf::Vector2u(24, 24));
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CHECK(image.getPixelsPtr() != nullptr);
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CHECK(image.getPixel({0, 0}) == sf::Color::Green);
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CHECK(image.getPixel({23, 23}) == sf::Color::Green);
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}
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}
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SECTION("loadFromStream()")
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{
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auto stream = sf::FileInputStream::open("Graphics/sfml-logo-big.png").value();
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const auto image = sf::Image::loadFromStream(stream).value();
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CHECK(image.getSize() == sf::Vector2u(1001, 304));
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CHECK(image.getPixelsPtr() != nullptr);
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CHECK(image.getPixel({0, 0}) == sf::Color(255, 255, 255, 0));
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CHECK(image.getPixel({200, 150}) == sf::Color(144, 208, 62));
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}
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SECTION("saveToFile()")
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{
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SECTION("Invalid size")
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{
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CHECK(!sf::Image({10, 0}, sf::Color::Magenta).saveToFile("test.jpg"));
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CHECK(!sf::Image({0, 10}, sf::Color::Magenta).saveToFile("test.jpg"));
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}
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const sf::Image image({256, 256}, sf::Color::Magenta);
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SECTION("No extension")
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{
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CHECK(!image.saveToFile("wheresmyextension"));
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CHECK(!image.saveToFile("pls/add/extension"));
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}
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SECTION("Invalid extension")
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{
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CHECK(!image.saveToFile("test.ps"));
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CHECK(!image.saveToFile("test.foo"));
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}
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SECTION("Successful save")
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{
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auto filename = std::filesystem::temp_directory_path();
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SECTION("To .bmp")
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{
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filename /= "test.bmp";
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CHECK(image.saveToFile(filename));
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}
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SECTION("To .tga")
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{
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filename /= "test.tga";
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CHECK(image.saveToFile(filename));
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}
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SECTION("To .png")
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{
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filename /= "test.png";
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CHECK(image.saveToFile(filename));
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}
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// Cannot test JPEG encoding due to it triggering UB in stbiw__jpg_writeBits
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const auto loadedImage = sf::Image::loadFromFile(filename).value();
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CHECK(loadedImage.getSize() == sf::Vector2u(256, 256));
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CHECK(loadedImage.getPixelsPtr() != nullptr);
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CHECK(std::filesystem::remove(filename));
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}
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}
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SECTION("saveToMemory()")
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{
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SECTION("Invalid size")
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{
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CHECK(!sf::Image({10, 0}, sf::Color::Magenta).saveToMemory("test.jpg"));
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CHECK(!sf::Image({0, 10}, sf::Color::Magenta).saveToMemory("test.jpg"));
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}
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const sf::Image image({16, 16}, sf::Color::Magenta);
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SECTION("No extension")
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{
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CHECK(!image.saveToMemory(""));
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}
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SECTION("Invalid extension")
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{
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CHECK(!image.saveToMemory("."));
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CHECK(!image.saveToMemory("gif"));
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CHECK(!image.saveToMemory(".jpg")); // Supposed to be "jpg"
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}
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SECTION("Successful save")
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{
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std::optional<std::vector<std::uint8_t>> maybeOutput;
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SECTION("To bmp")
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{
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maybeOutput = image.saveToMemory("bmp");
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REQUIRE(maybeOutput.has_value());
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const auto& output = *maybeOutput;
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REQUIRE(output.size() == 1146);
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CHECK(output[0] == 66);
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CHECK(output[1] == 77);
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CHECK(output[2] == 122);
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CHECK(output[3] == 4);
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CHECK(output[1000] == 255);
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CHECK(output[1001] == 255);
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CHECK(output[1002] == 255);
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CHECK(output[1003] == 0);
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}
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SECTION("To tga")
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{
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maybeOutput = image.saveToMemory("tga");
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REQUIRE(maybeOutput.has_value());
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const auto& output = *maybeOutput;
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REQUIRE(output.size() == 98);
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CHECK(output[0] == 0);
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CHECK(output[1] == 0);
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CHECK(output[2] == 10);
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CHECK(output[3] == 0);
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}
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SECTION("To png")
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{
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maybeOutput = image.saveToMemory("png");
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REQUIRE(maybeOutput.has_value());
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const auto& output = *maybeOutput;
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REQUIRE(output.size() == 92);
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CHECK(output[0] == 137);
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CHECK(output[1] == 80);
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CHECK(output[2] == 78);
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CHECK(output[3] == 71);
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}
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// Cannot test JPEG encoding due to it triggering UB in stbiw__jpg_writeBits
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}
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}
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SECTION("Set/get pixel")
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{
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sf::Image image(sf::Vector2u(10, 10), sf::Color::Green);
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CHECK(image.getPixel(sf::Vector2u(2, 2)) == sf::Color::Green);
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image.setPixel(sf::Vector2u(2, 2), sf::Color::Blue);
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CHECK(image.getPixel(sf::Vector2u(2, 2)) == sf::Color::Blue);
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}
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SECTION("Copy from Image")
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{
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SECTION("Copy (Image, Vector2u)")
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{
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const sf::Image image1(sf::Vector2u(10, 10), sf::Color::Blue);
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sf::Image image2(sf::Vector2u(10, 10));
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CHECK(image2.copy(image1, sf::Vector2u(0, 0)));
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image1.getPixel(sf::Vector2u(i, j)) == image2.getPixel(sf::Vector2u(i, j)));
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}
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}
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}
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SECTION("Copy (Image, Vector2u, IntRect)")
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{
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const sf::Image image1(sf::Vector2u(5, 5), sf::Color::Blue);
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sf::Image image2(sf::Vector2u(10, 10));
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CHECK(image2.copy(image1, sf::Vector2u(0, 0), sf::IntRect(sf::Vector2i(0, 0), sf::Vector2i(5, 5))));
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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if (i <= 4 && j <= 4)
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CHECK(image2.getPixel(sf::Vector2u(i, j)) == sf::Color::Blue);
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else
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CHECK(image2.getPixel(sf::Vector2u(i, j)) == sf::Color::Black);
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}
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}
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}
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SECTION("Copy (Image, Vector2u, IntRect, bool)")
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{
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const sf::Color dest(255, 0, 0, 255);
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const sf::Color source(5, 255, 78, 232);
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// Create the composited color for via the alpha composite over operation
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const auto a = static_cast<std::uint8_t>(source.a + (dest.a * (255 - source.a)) / 255);
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const auto r = static_cast<std::uint8_t>(
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((source.r * source.a) + ((dest.r * dest.a) * (255 - source.a)) / 255) / a);
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const auto g = static_cast<std::uint8_t>(
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((source.g * source.a) + ((dest.g * dest.a) * (255 - source.a)) / 255) / a);
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const auto b = static_cast<std::uint8_t>(
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((source.b * source.a) + ((dest.b * dest.a) * (255 - source.a)) / 255) / a);
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const sf::Color composite(r, g, b, a);
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sf::Image image1(sf::Vector2u(10, 10), dest);
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const sf::Image image2(sf::Vector2u(10, 10), source);
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CHECK(image1.copy(image2, sf::Vector2u(0, 0), sf::IntRect(sf::Vector2i(0, 0), sf::Vector2i(10, 10)), true));
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image1.getPixel(sf::Vector2u(i, j)) == composite);
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}
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}
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}
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SECTION("Copy (Out of bounds sourceRect)")
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{
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const sf::Image image1(sf::Vector2u(5, 5), sf::Color::Blue);
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sf::Image image2(sf::Vector2u(10, 10), sf::Color::Red);
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CHECK(!image2.copy(image1, sf::Vector2u(0, 0), sf::IntRect(sf::Vector2i(5, 5), sf::Vector2i(9, 9))));
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image2.getPixel(sf::Vector2u(i, j)) == sf::Color::Red);
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}
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}
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}
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}
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SECTION("Create mask from color")
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{
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SECTION("createMaskFromColor(Color)")
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{
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sf::Image image(sf::Vector2u(10, 10), sf::Color::Blue);
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image.createMaskFromColor(sf::Color::Blue);
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image.getPixel(sf::Vector2u(i, j)) == sf::Color(0, 0, 255, 0));
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}
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}
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}
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SECTION("createMaskFromColor(Color, std::uint8_t)")
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{
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sf::Image image(sf::Vector2u(10, 10), sf::Color::Blue);
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image.createMaskFromColor(sf::Color::Blue, 100);
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for (std::uint32_t i = 0; i < 10; ++i)
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{
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for (std::uint32_t j = 0; j < 10; ++j)
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{
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CHECK(image.getPixel(sf::Vector2u(i, j)) == sf::Color(0, 0, 255, 100));
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}
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}
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}
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}
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SECTION("Flip horizontally")
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{
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sf::Image image(sf::Vector2u(10, 10), sf::Color::Red);
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image.setPixel(sf::Vector2u(0, 0), sf::Color::Green);
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image.flipHorizontally();
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CHECK(image.getPixel(sf::Vector2u(9, 0)) == sf::Color::Green);
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}
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SECTION("Flip vertically")
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{
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sf::Image image(sf::Vector2u(10, 10), sf::Color::Red);
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image.setPixel(sf::Vector2u(0, 0), sf::Color::Green);
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image.flipVertically();
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CHECK(image.getPixel(sf::Vector2u(0, 9)) == sf::Color::Green);
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}
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}
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