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Diffstat (limited to 'tests/libslic3r/test_png_io.cpp')
-rw-r--r-- | tests/libslic3r/test_png_io.cpp | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tests/libslic3r/test_png_io.cpp b/tests/libslic3r/test_png_io.cpp new file mode 100644 index 000000000..b4fcd6255 --- /dev/null +++ b/tests/libslic3r/test_png_io.cpp @@ -0,0 +1,55 @@ +#define NOMINMAX +#include <catch2/catch.hpp> + +#include <numeric> + +#include "libslic3r/PNGReadWrite.hpp" +#include "libslic3r/SLA/AGGRaster.hpp" +#include "libslic3r/BoundingBox.hpp" + +using namespace Slic3r; + +static sla::RasterGrayscaleAA create_raster(const sla::RasterBase::Resolution &res) +{ + sla::RasterBase::PixelDim pixdim{1., 1.}; + + auto bb = BoundingBox({0, 0}, {scaled(1.), scaled(1.)}); + sla::RasterBase::Trafo trafo; + trafo.center_x = bb.center().x(); + trafo.center_y = bb.center().y(); + + return sla::RasterGrayscaleAA{res, pixdim, trafo, agg::gamma_threshold(.5)}; +} + +TEST_CASE("PNG read", "[PNG]") { + auto rst = create_raster({100, 100}); + + size_t rstsum = 0; + for (size_t r = 0; r < rst.resolution().height_px; ++r) + for (size_t c = 0; c < rst.resolution().width_px; ++c) + rstsum += rst.read_pixel(c, r); + + SECTION("Correct png buffer should be recognized as such.") { + auto enc_rst = rst.encode(sla::PNGRasterEncoder{}); + REQUIRE(Slic3r::png::is_png({enc_rst.data(), enc_rst.size()})); + } + + SECTION("Fake png buffer should be recognized as such.") { + std::vector<uint8_t> fake(10, '\0'); + REQUIRE(!Slic3r::png::is_png({fake.data(), fake.size()})); + } + + SECTION("Decoded PNG buffer resolution should match the original") { + auto enc_rst = rst.encode(sla::PNGRasterEncoder{}); + + png::ImageGreyscale img; + png::decode_png({enc_rst.data(), enc_rst.size()}, img); + + REQUIRE(img.rows == rst.resolution().height_px); + REQUIRE(img.cols == rst.resolution().width_px); + + size_t sum = std::accumulate(img.buf.begin(), img.buf.end(), size_t(0)); + + REQUIRE(sum == rstsum); + } +} |