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#include <mbgl/test/util.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/io.hpp>
#include <mapbox/pixelmatch.hpp>
namespace mbgl {
namespace test {
void checkImage(const std::string& base,
const PremultipliedImage& actual,
double imageThreshold,
double pixelThreshold) {
#if !TEST_READ_ONLY
if (getenv("UPDATE")) {
util::write_file(base + "/expected.png", encodePNG(actual));
return;
}
#endif
std::string expected_image;
try {
expected_image = util::read_file(base + "/expected.png");
} catch (std::exception& ex) {
Log::Error(Event::Setup, "Failed to load expected image %s: %s",
(base + "/expected.png").c_str(), ex.what());
throw;
}
PremultipliedImage expected = decodeImage(expected_image);
PremultipliedImage diff { expected.size };
#if !TEST_READ_ONLY
util::write_file(base + "/actual.png", encodePNG(actual));
#endif
ASSERT_EQ(expected.size, actual.size);
double pixels = mapbox::pixelmatch(actual.data.get(),
expected.data.get(),
expected.size.width,
expected.size.height,
diff.data.get(),
pixelThreshold);
EXPECT_LE(pixels / (expected.size.width * expected.size.height), imageThreshold);
#if !TEST_READ_ONLY
util::write_file(base + "/diff.png", encodePNG(diff));
#endif
}
} // namespace test
} // namespace mbgl
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