Add svg-flatten SVG feature tests

1 files changed, 0 insertions, 405 deletions

diff --git a/svg-flatten/src/nopencv_test.cpp b/svg-flatten/src/nopencv_test.cpp
deleted file mode 100644
index 17ba71e..0000000
--- a/svg-flatten/src/nopencv_test.cpp
+++ /dev/null
@@ -1,405 +0,0 @@
-
-#include <iostream>
-#include <fstream>
-#include <iomanip>
-#include <cmath>
-#include <filesystem>
-
-#include "nopencv.hpp"
-
-#include <subprocess.h>
-#include <minunit.h>
-
-#include "stb_image.h"
-
-using namespace gerbolyze;
-using namespace gerbolyze::nopencv;
-
-char msg[1024];
-
-class TempfileHack {
-public:
-    TempfileHack(const string ext) : m_path { filesystem::temp_directory_path() / (std::tmpnam(nullptr) + ext) } {}
-    ~TempfileHack() { remove(m_path); }
-
-    const char *c_str() { return m_path.c_str(); }
-
-private:
-    filesystem::path m_path;
-};
-
-class SVGPolyRenderer {
-public:
-    SVGPolyRenderer(const char *fn, int width_px, int height_px)
-        : m_svg(fn) {
-        m_svg << "<svg width=\"" << width_px << "px\" height=\"" << height_px << "px\" viewBox=\"0 0 "
-            << width_px << " " << height_px << "\" "
-            << "xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">" << endl;
-        m_svg << "<rect width=\"100%\" height=\"100%\" fill=\"black\"/>" << endl;
-    }
-
-    ContourCallback callback() {
-        return [this](Polygon_i &poly, ContourPolarity pol) {
-            mu_assert(poly.size() > 0, "Empty contour returned");
-            mu_assert(poly.size() > 2, "Contour has less than three points, no area");
-            mu_assert(pol == CP_CONTOUR || pol == CP_HOLE, "Contour has invalid polarity");
-
-            m_svg << "<path fill=\"" << ((pol == CP_HOLE) ? "black" : "white") << "\" d=\"";
-            m_svg << "M " << poly[0][0] << " " << poly[0][1];
-            for (size_t i=1; i<poly.size(); i++) {
-                m_svg << " L " << poly[i][0] << " " << poly[i][1];
-            }
-            m_svg << " Z\"/>" << endl;
-        };
-    }
-
-    void close() {
-        m_svg << "</svg>" << endl;
-        m_svg.close();
-    }
-
-private:
-    ofstream m_svg;
-};
-
-MU_TEST(test_complex_example_from_paper) {
-    int32_t img_data[6*9] = {
-        0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 1, 1, 1, 1, 1, 1, 1, 0,
-        0, 1, 0, 0, 1, 0, 0, 1, 0,
-        0, 1, 0, 0, 1, 0, 0, 1, 0,
-        0, 1, 1, 1, 1, 1, 1, 1, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0,
-    };
-    Image32 test_img(9, 6, static_cast<int*>(img_data));
-
-    const Polygon_i expected_polys[3] = {
-        {
-            {1,1}, {1,2}, {1,3}, {1,4}, {1,5},
-            {2,5}, {3,5}, {4,5}, {5,5}, {6,5}, {7,5}, {8,5},
-            {8,4}, {8,3}, {8,2}, {8,1},
-            {7,1}, {6,1}, {5,1}, {4,1}, {3,1}, {2,1}
-        },
-        {
-            {2,2}, {2,3}, {2,4},
-            {3,4}, {4,4},
-            {4,3}, {4,2},
-            {3,2}
-        },
-        {
-            {5,2}, {5,3}, {5,4},
-            {6,4}, {7,4},
-            {7,3}, {7,2},
-            {6,2}
-        }
-    };
-
-    const ContourPolarity expected_polarities[3] = {CP_CONTOUR, CP_HOLE, CP_HOLE};
-    
-    int invocation_count = 0;
-    gerbolyze::nopencv::find_contours(test_img, [&invocation_count, &expected_polarities, &expected_polys](Polygon_i &poly, ContourPolarity pol) {
-            invocation_count += 1;
-            mu_assert((invocation_count <= 3), "Too many contours returned"); 
-
-            mu_assert(poly.size() > 0, "Empty contour returned");
-            mu_assert_int_eq(pol, expected_polarities[invocation_count-1]);
-
-            i2p last;
-            bool first = true;
-            Polygon_i exp = expected_polys[invocation_count-1];
-            for (auto &p : poly) {
-                if (!first) {
-                    mu_assert((fabs(p[0] - last[0]) + fabs(p[1] - last[1]) == 1), "Subsequent contour points have distance other than one");
-                    mu_assert(find(exp.begin(), exp.end(), p) != exp.end(), "Got unexpected contour point");
-                }
-                last = p;
-            }
-        });
-    mu_assert_int_eq(3, invocation_count);
-
-    int32_t tpl[6*9] = {
-        0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 2, 2, 2, 2, 2, 2,-2, 0,
-        0,-3, 0, 0,-4, 0, 0,-2, 0,
-        0,-3, 0, 0,-4, 0, 0,-2, 0,
-        0, 2, 2, 2, 2, 2, 2,-2, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0,
-    };
-
-
-    for (int y=0; y<6; y++) {
-        for (int x=0; x<9; x++) {
-            int a = test_img.at(x, y), b = tpl[y*9+x];
-            if (a != b) {
-                cout << "Result:" << endl;
-                cout << "    ";
-                for (int x=0; x<9; x++) {
-                    cout << x << "  ";
-                }
-                cout << endl;
-                cout << "    ";
-                for (int x=0; x<9; x++) {
-                    cout << "---";
-                }
-                cout << endl;
-                for (int y=0; y<6; y++) {
-                    cout << y << " | ";
-                    for (int x=0; x<9; x++) {
-                        cout << setfill(' ') << setw(2) << test_img.at(x, y) << " ";
-                    }
-                    cout << endl;
-                }
-
-                snprintf(msg, sizeof(msg), "Result does not match template @(%d, %d): %d != %d\n", x, y, a, b);
-                mu_fail(msg);
-            }
-        }
-    }
-}
-
-int render_svg(const char *in_svg, const char *out_png) {
-    const char *command_line[] = {"resvg", in_svg, out_png, nullptr};
-    struct subprocess_s subprocess;
-    int rc = subprocess_create(command_line, subprocess_option_inherit_environment, &subprocess);
-    if (rc)
-        return rc;
-
-    int resvg_rc = -1;
-    rc = subprocess_join(&subprocess, &resvg_rc);
-    if (rc)
-        return rc;
-    if (resvg_rc)
-        return -resvg_rc;
-
-    rc = subprocess_destroy(&subprocess);
-    if (rc)
-        return rc;
-
-    return 0;
-}
-
-static void testdata_roundtrip(const char *fn) {
-    Image32 ref_img;
-    mu_assert(ref_img.load(fn), "Input image failed to load");
-    ref_img.binarize();
-    Image32 ref_img_copy(ref_img);
-
-    TempfileHack tmp_svg(".svg");
-    TempfileHack tmp_png(".png");
-
-    SVGPolyRenderer ctx(tmp_svg.c_str(), ref_img.cols(), ref_img.rows());
-    gerbolyze::nopencv::find_contours(ref_img, ctx.callback());
-    ctx.close();
-
-    mu_assert_int_eq(0, render_svg(tmp_svg.c_str(), tmp_png.c_str()));
-
-    Image32 out_img;
-    mu_assert(out_img.load(tmp_png.c_str()), "Output image failed to load");
-    out_img.binarize();
-
-    mu_assert_int_eq(ref_img.cols(), out_img.cols());
-    mu_assert_int_eq(ref_img.rows(), out_img.rows());
-
-    for (int y=0; y<out_img.rows(); y++) {
-        for (int x=0; x<out_img.cols(); x++) {
-            if (out_img.at(x, y) != ref_img_copy.at(x, y)) {
-                snprintf(msg, sizeof(msg), "%s: Result does not match input @(%d, %d): %d != %d\n", fn, x, y, out_img.at(x, y), ref_img_copy.at(x, y));
-                mu_fail(msg);
-            }
-        }
-    }
-}
-
-MU_TEST(test_round_trip_blank)              { testdata_roundtrip("testdata/blank.png"); }
-MU_TEST(test_round_trip_white)              { testdata_roundtrip("testdata/white.png"); }
-MU_TEST(test_round_trip_blob_border_w)      { testdata_roundtrip("testdata/blob-border-w.png"); }
-MU_TEST(test_round_trip_blobs_borders)      { testdata_roundtrip("testdata/blobs-borders.png"); }
-MU_TEST(test_round_trip_blobs_corners)      { testdata_roundtrip("testdata/blobs-corners.png"); }
-MU_TEST(test_round_trip_blobs_crossing)     { testdata_roundtrip("testdata/blobs-crossing.png"); }
-MU_TEST(test_round_trip_cross)              { testdata_roundtrip("testdata/cross.png"); }
-MU_TEST(test_round_trip_letter_e)           { testdata_roundtrip("testdata/letter-e.png"); }
-MU_TEST(test_round_trip_paper_example)      { testdata_roundtrip("testdata/paper-example.png"); }
-MU_TEST(test_round_trip_paper_example_inv)  { testdata_roundtrip("testdata/paper-example-inv.png"); }
-MU_TEST(test_round_trip_single_px)          { testdata_roundtrip("testdata/single-px.png"); }
-MU_TEST(test_round_trip_single_px_inv)      { testdata_roundtrip("testdata/single-px-inv.png"); }
-MU_TEST(test_round_trip_two_blobs)          { testdata_roundtrip("testdata/two-blobs.png"); }
-MU_TEST(test_round_trip_two_px)             { testdata_roundtrip("testdata/two-px.png"); }
-MU_TEST(test_round_trip_two_px_inv)         { testdata_roundtrip("testdata/two-px-inv.png"); }
-
-static void test_polygon_area(const char *fn) {
-    //cerr << endl << "poly area test " << fn << endl;
-    Image32 ref_img;
-    mu_assert(ref_img.load(fn), "Input image failed to load");
-    ref_img.binarize();
-
-    int white_px_count = 0;
-    int black_px_count = 0;
-    for (int y=0; y<ref_img.rows(); y++) {
-        for (int x=0; x<ref_img.cols(); x++) {
-            if (ref_img.at(x, y)) {
-                white_px_count += 1;
-            } else {
-                black_px_count += 1;
-            }
-        }
-    }
-
-    double pos_sum = 0.0;
-    double neg_sum = ref_img.size();
-    gerbolyze::nopencv::find_contours(ref_img, [&pos_sum, &neg_sum](Polygon_i& poly, ContourPolarity pol) {
-            double area = polygon_area(poly);
-            //cerr << endl << fn << ": " << area << " " << pos_sum << " / " << neg_sum << " -- " << white_px_count << " / " << black_px_count << " GOT: " << poly.size() << " w/ " << pol << endl;
-            mu_assert(fabs(area) > 0.99, "Polygon smaller than a single pixel");
-            mu_assert((pol == CP_CONTOUR) == (area >= 0), "Polygon area has incorrect sign");
-
-            pos_sum += area;
-            neg_sum -= area;
-        });
-
-    mu_assert(pos_sum - white_px_count < 0.01, "Calculated area outside tolerance");
-    mu_assert(neg_sum - black_px_count < 0.01, "Calculated area outside tolerance");
-    //cerr << endl << "poly area test " << fn << " done" << endl;
-}
-
-MU_TEST(test_polygon_area_blank)              { test_polygon_area("testdata/blank.png"); }
-MU_TEST(test_polygon_area_white)              { test_polygon_area("testdata/white.png"); }
-MU_TEST(test_polygon_area_blob_border_w)      { test_polygon_area("testdata/blob-border-w.png"); }
-MU_TEST(test_polygon_area_blobs_borders)      { test_polygon_area("testdata/blobs-borders.png"); }
-MU_TEST(test_polygon_area_blobs_corners)      { test_polygon_area("testdata/blobs-corners.png"); }
-MU_TEST(test_polygon_area_blobs_crossing)     { test_polygon_area("testdata/blobs-crossing.png"); }
-MU_TEST(test_polygon_area_cross)              { test_polygon_area("testdata/cross.png"); }
-MU_TEST(test_polygon_area_letter_e)           { test_polygon_area("testdata/letter-e.png"); }
-MU_TEST(test_polygon_area_paper_example)      { test_polygon_area("testdata/paper-example.png"); }
-MU_TEST(test_polygon_area_paper_example_inv)  { test_polygon_area("testdata/paper-example-inv.png"); }
-MU_TEST(test_polygon_area_single_px)          { test_polygon_area("testdata/single-px.png"); }
-MU_TEST(test_polygon_area_single_px_inv)      { test_polygon_area("testdata/single-px-inv.png"); }
-MU_TEST(test_polygon_area_two_blobs)          { test_polygon_area("testdata/two-blobs.png"); }
-MU_TEST(test_polygon_area_two_px)             { test_polygon_area("testdata/two-px.png"); }
-MU_TEST(test_polygon_area_two_px_inv)         { test_polygon_area("testdata/two-px-inv.png"); }
-
-static void chain_approx_test(const char *fn) {
-    //cout << endl << "Testing \"" << fn << "\"" << endl;
-    Image32 ref_img;
-    mu_assert(ref_img.load(fn), "Input image failed to load");
-    ref_img.binarize();
-    Image32 ref_img_copy(ref_img);
-
-    TempfileHack tmp_svg(".svg");
-    TempfileHack tmp_png(".png");
-
-    SVGPolyRenderer ctx(tmp_svg.c_str(), ref_img.cols(), ref_img.rows());
-    gerbolyze::nopencv::find_contours(ref_img, simplify_contours_teh_chin(ctx.callback()));
-    ctx.close();
-
-    mu_assert_int_eq(0, render_svg(tmp_svg.c_str(), tmp_png.c_str()));
-
-    Image32 out_img;
-    mu_assert(out_img.load(tmp_png.c_str()), "Output image failed to load");
-    mu_assert_int_eq(ref_img.rows(), out_img.rows());
-    mu_assert_int_eq(ref_img.cols(), out_img.cols());
-
-    double max_abs_deviation = 0;
-    double rms_sum = 0; 
-    double mean_sum = 0; 
-    for (int y=0; y<out_img.rows(); y++) {
-        for (int x=0; x<out_img.cols(); x++) {
-            double delta = fabs((double)out_img.at(x, y)/255.0 - (double)ref_img_copy.at(x, y));
-            max_abs_deviation = fmax(max_abs_deviation, delta);
-            rms_sum += delta*delta;
-            mean_sum += delta;
-        }
-    }
-
-    rms_sum = sqrt(rms_sum / out_img.size());
-    mean_sum /= out_img.size();
-    if (rms_sum > 0.5) {
-        snprintf(msg, sizeof(msg), "%s: Chain approximation RMS error is above threshold: %.3f > 0.5\n", fn, rms_sum);
-        mu_fail(msg);
-    }
-    if (mean_sum > 0.1) {
-        snprintf(msg, sizeof(msg), "%s: Chain approximation mean error is above threshold: %.3f > 0.1\n", fn, mean_sum);
-        mu_fail(msg);
-    }
-    //mu_assert(max_abs_deviation < 0.5, "Maximum chain approximation error is above threshold");
-}
-
-
-MU_TEST(chain_approx_test_chromosome)         { chain_approx_test("testdata/chain-approx-teh-chin-chromosome.png"); }
-MU_TEST(chain_approx_test_blank)              { chain_approx_test("testdata/blank.png"); }
-MU_TEST(chain_approx_test_white)              { chain_approx_test("testdata/white.png"); }
-MU_TEST(chain_approx_test_blob_border_w)      { chain_approx_test("testdata/blob-border-w.png"); }
-MU_TEST(chain_approx_test_blobs_borders)      { chain_approx_test("testdata/blobs-borders.png"); }
-MU_TEST(chain_approx_test_blobs_corners)      { chain_approx_test("testdata/blobs-corners.png"); }
-MU_TEST(chain_approx_test_blobs_crossing)     { chain_approx_test("testdata/blobs-crossing.png"); }
-MU_TEST(chain_approx_test_cross)              { chain_approx_test("testdata/cross.png"); }
-MU_TEST(chain_approx_test_letter_e)           { chain_approx_test("testdata/letter-e.png"); }
-MU_TEST(chain_approx_test_paper_example)      { chain_approx_test("testdata/paper-example.png"); }
-MU_TEST(chain_approx_test_paper_example_inv)  { chain_approx_test("testdata/paper-example-inv.png"); }
-MU_TEST(chain_approx_test_single_px)          { chain_approx_test("testdata/single-px.png"); }
-MU_TEST(chain_approx_test_single_px_inv)      { chain_approx_test("testdata/single-px-inv.png"); }
-MU_TEST(chain_approx_test_two_blobs)          { chain_approx_test("testdata/two-blobs.png"); }
-MU_TEST(chain_approx_test_two_px)             { chain_approx_test("testdata/two-px.png"); }
-MU_TEST(chain_approx_test_two_px_inv)         { chain_approx_test("testdata/two-px-inv.png"); }
-
-
-MU_TEST_SUITE(nopencv_contours_suite) {
-    MU_RUN_TEST(test_complex_example_from_paper);
-
-    MU_RUN_TEST(test_round_trip_blank);
-    MU_RUN_TEST(test_round_trip_white);
-    MU_RUN_TEST(test_round_trip_blob_border_w);
-    MU_RUN_TEST(test_round_trip_blobs_borders);
-    MU_RUN_TEST(test_round_trip_blobs_corners);
-    MU_RUN_TEST(test_round_trip_blobs_crossing);
-    MU_RUN_TEST(test_round_trip_cross);
-    MU_RUN_TEST(test_round_trip_letter_e);
-    MU_RUN_TEST(test_round_trip_paper_example);
-    MU_RUN_TEST(test_round_trip_paper_example_inv);
-    MU_RUN_TEST(test_round_trip_single_px);
-    MU_RUN_TEST(test_round_trip_single_px_inv);
-    MU_RUN_TEST(test_round_trip_two_blobs);
-    MU_RUN_TEST(test_round_trip_two_px);
-    MU_RUN_TEST(test_round_trip_two_px_inv);
-
-    MU_RUN_TEST(chain_approx_test_chromosome);
-    MU_RUN_TEST(chain_approx_test_blank);
-    MU_RUN_TEST(chain_approx_test_white);
-    MU_RUN_TEST(chain_approx_test_blob_border_w);
-    MU_RUN_TEST(chain_approx_test_blobs_borders);
-    MU_RUN_TEST(chain_approx_test_blobs_corners);
-    MU_RUN_TEST(chain_approx_test_blobs_crossing);
-    MU_RUN_TEST(chain_approx_test_cross);
-    MU_RUN_TEST(chain_approx_test_letter_e);
-    MU_RUN_TEST(chain_approx_test_paper_example);
-    MU_RUN_TEST(chain_approx_test_paper_example_inv);
-    MU_RUN_TEST(chain_approx_test_single_px);
-    MU_RUN_TEST(chain_approx_test_single_px_inv);
-    MU_RUN_TEST(chain_approx_test_two_blobs);
-    MU_RUN_TEST(chain_approx_test_two_px);
-    MU_RUN_TEST(chain_approx_test_two_px_inv);
-
-    MU_RUN_TEST(test_polygon_area_blank);
-    MU_RUN_TEST(test_polygon_area_white);
-    MU_RUN_TEST(test_polygon_area_blob_border_w);
-    MU_RUN_TEST(test_polygon_area_blobs_borders);
-    MU_RUN_TEST(test_polygon_area_blobs_corners);
-    MU_RUN_TEST(test_polygon_area_blobs_crossing);
-    MU_RUN_TEST(test_polygon_area_cross);
-    MU_RUN_TEST(test_polygon_area_letter_e);
-    MU_RUN_TEST(test_polygon_area_paper_example);
-    MU_RUN_TEST(test_polygon_area_paper_example_inv);
-    MU_RUN_TEST(test_polygon_area_single_px);
-    MU_RUN_TEST(test_polygon_area_single_px_inv);
-    MU_RUN_TEST(test_polygon_area_two_blobs);
-    MU_RUN_TEST(test_polygon_area_two_px);
-    MU_RUN_TEST(test_polygon_area_two_px_inv);
-};
-
-int main(int argc, char **argv) {
-    (void)argc;
-    (void)argv;
-
-    MU_RUN_SUITE(nopencv_contours_suite);
-    MU_REPORT();
-    return MU_EXIT_CODE;
-}