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-rw-r--r--svg-flatten/src/nopencv.cpp53
-rw-r--r--svg-flatten/src/nopencv.hpp24
-rw-r--r--svg-flatten/src/nopencv_test.cpp74
3 files changed, 95 insertions, 56 deletions
diff --git a/svg-flatten/src/nopencv.cpp b/svg-flatten/src/nopencv.cpp
index 2384fcc..18d3f20 100644
--- a/svg-flatten/src/nopencv.cpp
+++ b/svg-flatten/src/nopencv.cpp
@@ -2,6 +2,9 @@
#include <iostream>
#include <iomanip>
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
#include "nopencv.hpp"
using namespace gerbolyze;
@@ -374,3 +377,53 @@ ContourCallback gerbolyze::nopencv::simplify_contours_teh_chin(ContourCallback c
};
}
+
+gerbolyze::nopencv::Image32::Image32(int size_x, int size_y, const int32_t *data) {
+ assert(size_x > 0 && size_x < 100000);
+ assert(size_y > 0 && size_y < 100000);
+ m_data = new int32_t[size_x * size_y] { 0 };
+ m_rows = size_y;
+ m_cols = size_x;
+ if (data != nullptr) {
+ memcpy(m_data, data, sizeof(int32_t) * size_x * size_y);
+ }
+}
+
+bool gerbolyze::nopencv::Image32::load(const char *filename) {
+ return stb_to_internal(stbi_load(filename, &m_cols, &m_rows, nullptr, 1));
+}
+
+bool gerbolyze::nopencv::Image32::load_memory(uint8_t *buf, size_t len) {
+ return stb_to_internal(stbi_load_from_memory(buf, len, &m_cols, &m_rows, nullptr, 1));
+}
+
+void gerbolyze::nopencv::Image32::binarize() {
+ assert(m_data != nullptr);
+ assert(m_rows > 0 && m_cols > 0);
+
+ for (int y=0; y<m_rows; y++) {
+ for (int x=0; x<m_cols; x++) {
+ m_data[y*m_cols + x] = m_data[y*m_cols + x] > 0;
+ }
+ }
+}
+
+bool gerbolyze::nopencv::Image32::stb_to_internal(uint8_t *data) {
+ if (data == nullptr)
+ return false;
+
+ if (m_rows < 0 || m_rows > 100000)
+ return false;
+ if (m_cols < 0 || m_cols > 100000)
+ return false;
+
+ m_data = new int32_t[size()] { 0 };
+ for (int y=0; y<m_rows; y++) {
+ for (int x=0; x<m_cols; x++) {
+ m_data[y*m_cols + x] = data[y*m_cols + x];
+ }
+ }
+
+ stbi_image_free(data);
+ return true;
+}
diff --git a/svg-flatten/src/nopencv.hpp b/svg-flatten/src/nopencv.hpp
index 9be2434..51a068a 100644
--- a/svg-flatten/src/nopencv.hpp
+++ b/svg-flatten/src/nopencv.hpp
@@ -41,23 +41,20 @@ namespace gerbolyze {
class Image32 {
public:
- Image32(int size_x, int size_y, const int32_t *data=nullptr) {
- assert(size_x > 0 && size_x < 100000);
- assert(size_y > 0 && size_y < 100000);
- m_data = new int32_t[size_x * size_y] { 0 };
- m_rows = size_y;
- m_cols = size_x;
- if (data != nullptr) {
- memcpy(m_data, data, sizeof(int32_t) * size_x * size_y);
- }
- }
-
+ Image32() {}
+ Image32(int size_x, int size_y, const int32_t *data=nullptr);
Image32(const Image32 &other) : Image32(other.cols(), other.rows(), other.ptr()) {}
~Image32() {
- delete m_data;
+ if (m_data) {
+ delete m_data;
+ }
}
+ bool load(const char *filename);
+ bool load_memory(uint8_t *buf, size_t len);
+ void binarize();
+
int32_t &at(int x, int y) {
assert(x >= 0 && y >= 0 && x < m_cols && y < m_rows);
assert(m_data != nullptr);
@@ -93,9 +90,12 @@ namespace gerbolyze {
int rows() const { return m_rows; }
int cols() const { return m_cols; }
+ int size() const { return m_cols*m_rows; }
const int32_t *ptr() const { return m_data; }
private:
+ bool stb_to_internal(uint8_t *data);
+
int32_t *m_data = nullptr;
int m_rows=0, m_cols=0;
};
diff --git a/svg-flatten/src/nopencv_test.cpp b/svg-flatten/src/nopencv_test.cpp
index 389de60..902aa18 100644
--- a/svg-flatten/src/nopencv_test.cpp
+++ b/svg-flatten/src/nopencv_test.cpp
@@ -10,7 +10,6 @@
#include <subprocess.h>
#include <minunit.h>
-#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
using namespace gerbolyze;
@@ -180,42 +179,35 @@ int render_svg(const char *in_svg, const char *out_png) {
}
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;
+ 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(), x, y);
+ SVGPolyRenderer ctx(tmp_svg.c_str(), ref_img.cols(), ref_img.rows());
gerbolyze::nopencv::find_blobs(ref_img, ctx.callback());
ctx.close();
mu_assert_int_eq(0, render_svg(tmp_svg.c_str(), tmp_png.c_str()));
- 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);
+ 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);
}
}
}
- stbi_image_free(out_data);
}
MU_TEST(test_round_trip_blank) { testdata_roundtrip("testdata/blank.png"); }
@@ -237,45 +229,39 @@ MU_TEST(test_round_trip_two_px_inv) { testdata_roundtrip("testdata/two-p
static void chain_approx_test(const char *fn) {
//cout << endl << "Testing \"" << fn << "\"" << endl;
- int w, h;
- uint8_t *data = stbi_load(fn, &w, &h, nullptr, 1);
- Image32 ref_img(w, h);
- for (int y=0; y<h; y++) {
- for (int x=0; x<w; x++) {
- ref_img.at(x, y) = data[y*w + x] / 255;
- }
- }
+ 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(), w, h);
+ SVGPolyRenderer ctx(tmp_svg.c_str(), ref_img.cols(), ref_img.rows());
gerbolyze::nopencv::find_blobs(ref_img, simplify_contours_teh_chin(ctx.callback()));
ctx.close();
- mu_assert_int_eq(0, render_svg(tmp_svg.c_str(), "/tmp/out.png"));
+ mu_assert_int_eq(0, render_svg(tmp_svg.c_str(), tmp_png.c_str()));
- int out_w, out_h;
- uint8_t *out_data = stbi_load("/tmp/out.png", &out_w, &out_h, nullptr, 1);
- mu_assert_int_eq(w, out_w);
- mu_assert_int_eq(h, out_h);
+ 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<h; y++) {
- for (int x=0; x<w; x++) {
- double delta = fabs((double)out_data[y*w + x] - (double)data[y*w + x]) / 255.0;
+ 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;
}
}
- stbi_image_free(data);
- stbi_image_free(out_data);
- rms_sum = sqrt(rms_sum / (w*h));
- mean_sum /= w*h;
+ 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);
generated by cgit (git 2.34.1) at 2024-11-29 10:11:49 +0000