56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
#define NOMINMAX
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#include <catch2/catch.hpp>
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#include <numeric>
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#include "libslic3r/PNGReadWrite.hpp"
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#include "libslic3r/SLA/AGGRaster.hpp"
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#include "libslic3r/BoundingBox.hpp"
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using namespace Slic3r;
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static sla::RasterGrayscaleAA create_raster(const sla::Resolution &res)
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{
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sla::PixelDim pixdim{1., 1.};
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auto bb = BoundingBox({0, 0}, {scaled(1.), scaled(1.)});
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sla::RasterBase::Trafo trafo;
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trafo.center_x = bb.center().x();
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trafo.center_y = bb.center().y();
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return sla::RasterGrayscaleAA{res, pixdim, trafo, agg::gamma_threshold(.5)};
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}
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TEST_CASE("PNG read", "[PNG]") {
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auto rst = create_raster({100, 100});
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size_t rstsum = 0;
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for (size_t r = 0; r < rst.resolution().height_px; ++r)
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for (size_t c = 0; c < rst.resolution().width_px; ++c)
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rstsum += rst.read_pixel(c, r);
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SECTION("Correct png buffer should be recognized as such.") {
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auto enc_rst = rst.encode(sla::PNGRasterEncoder{});
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REQUIRE(Slic3r::png::is_png({enc_rst.data(), enc_rst.size()}));
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}
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SECTION("Fake png buffer should be recognized as such.") {
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std::vector<uint8_t> fake(10, '\0');
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REQUIRE(!Slic3r::png::is_png({fake.data(), fake.size()}));
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}
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SECTION("Decoded PNG buffer resolution should match the original") {
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auto enc_rst = rst.encode(sla::PNGRasterEncoder{});
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png::ImageGreyscale img;
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png::decode_png({enc_rst.data(), enc_rst.size()}, img);
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REQUIRE(img.rows == rst.resolution().height_px);
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REQUIRE(img.cols == rst.resolution().width_px);
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size_t sum = std::accumulate(img.buf.begin(), img.buf.end(), size_t(0));
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REQUIRE(sum == rstsum);
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}
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}
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