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#include <iostream>
#include <fstream>
#include <iomanip>
#include <cmath>
#include <filesystem>
#include "nopencv.hpp"
#include <subprocess.h>
#include <minunit.h>
#define STB_IMAGE_IMPLEMENTATION
#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;
};
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 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_blobs(test_img, [&invocation_count, &expected_polarities, &expected_polys](Polygon 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]);
d2p last;
bool first = true;
Polygon exp = expected_polys[invocation_count-1];
//cout << "poly: ";
for (d2p &p : poly) {
//cout << "(" << p[0] << ", " << p[1] << "), ";
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;
}
//cout << endl;
});
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);
}
}
}
}
static void testdata_roundtrip(const char *fn) {
int x, y;
uint8_t *data = stbi_load(fn, &x, &y, nullptr, 1);
Image32 ref_img(x, y);
for (int cy=0; cy<y; cy++) {
for (int cx=0; cx<x; cx++) {
ref_img.at(cx, cy) = data[cy*x + cx] / 255;
}
}
stbi_image_free(data);
Image32 ref_img_copy(ref_img);
TempfileHack tmp_svg(".svg");
TempfileHack tmp_png(".png");
ofstream svg(tmp_svg.c_str());
svg << "<svg width=\"" << x << "px\" height=\"" << y << "px\" viewBox=\"0 0 "
<< x << " " << y << "\" "
<< "xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">" << endl;
svg << "<rect width=\"100%\" height=\"100%\" fill=\"black\"/>" << endl;
gerbolyze::nopencv::find_blobs(ref_img, [&svg](Polygon 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");
svg << "<path fill=\"" << ((pol == CP_HOLE) ? "black" : "white") << "\" d=\"";
svg << "M " << poly[0][0] << " " << poly[0][1];
for (size_t i=1; i<poly.size(); i++) {
svg << " L " << poly[i][0] << " " << poly[i][1];
}
svg << " Z\"/>" << endl;
});
svg << "</svg>" << endl;
svg.close();
const char *command_line[] = {"resvg", tmp_svg.c_str(), tmp_png.c_str()};
struct subprocess_s subprocess;
int rc = subprocess_create(command_line, subprocess_option_inherit_environment, &subprocess);
mu_assert_int_eq(0, rc);
int resvg_rc = -1;
rc = subprocess_join(&subprocess, &resvg_rc);
mu_assert_int_eq(0, rc);
mu_assert_int_eq(0, resvg_rc);
rc = subprocess_destroy(&subprocess);
mu_assert_int_eq(0, rc);
int out_x, out_y;
uint8_t *out_data = stbi_load(tmp_png.c_str(), &out_x, &out_y, nullptr, 1);
mu_assert_int_eq(x, out_x);
mu_assert_int_eq(y, out_y);
for (int cy=0; cy<y; cy++) {
for (int cx=0; cx<x; cx++) {
int actual = out_data[cy*x + cx];
int expected = ref_img_copy.at(cx, cy)*255;
if (actual != expected) {
snprintf(msg, sizeof(msg), "%s: Result does not match input @(%d, %d): %d != %d\n", fn, cx, cy, actual, expected);
mu_fail(msg);
}
}
}
stbi_image_free(out_data);
}
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"); }
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);
};
int main(int argc, char **argv) {
(void)argc;
(void)argv;
MU_RUN_SUITE(nopencv_contours_suite);
MU_REPORT();
return MU_EXIT_CODE;
}
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