Reorg: move svg-flatten files into subdir

1 files changed, 395 insertions, 0 deletions

diff --git a/svg-flatten/src/main.cpp b/svg-flatten/src/main.cpp
new file mode 100644
index 0000000..135a4c1
--- /dev/null
+++ b/svg-flatten/src/main.cpp
@@ -0,0 +1,395 @@
+
+#include <cstdlib>
+#include <cstdio>
+#include <filesystem>
+#include <iostream>
+#include <fstream>
+#include <algorithm>
+#include <string>
+#include <argagg.hpp>
+#include <subprocess.h>
+#include <gerbolyze.hpp>
+#include "vec_core.h"
+#include <base64.h>
+
+using argagg::parser_results;
+using argagg::parser;
+using namespace std;
+using namespace gerbolyze;
+
+int main(int argc, char **argv) {
+    parser argparser {{
+            {"help", {"-h", "--help"},
+                "Print help and exit",
+                0},
+            {"version", {"-v", "--version"},
+                "Print version and exit",
+                0},
+            {"ofmt", {"-o", "--format"},
+                "Output format. Supported: gerber, svg, s-exp (KiCAD S-Expression)",
+                1},
+            {"precision", {"-p", "--precision"},
+                "Number of decimal places use for exported coordinates (gerber: 1-9, SVG: 0-*)",
+                1},
+            {"svg_clear_color", {"--clear-color"},
+                "SVG color to use for \"clear\" areas (default: white)",
+                1},
+            {"svg_dark_color", {"--dark-color"},
+                "SVG color to use for \"dark\" areas (default: black)",
+                1},
+            {"min_feature_size", {"-d", "--trace-space"},
+                "Minimum feature size of elements in vectorized graphics (trace/space) in mm. Default: 0.1mm.",
+                1},
+            {"no_header", {"--no-header"},
+                "Do not export output format header/footer, only export the primitives themselves",
+                0},
+            {"flatten", {"--flatten"},
+                "Flatten output so it only consists of non-overlapping white polygons. This perform composition at the vector level. Potentially slow.",
+                0},
+            {"no_flatten", {"--no-flatten"},
+                "Disable automatic flattening for KiCAD S-Exp export",
+                0},
+            {"dilate", {"--dilate"},
+                "Dilate output gerber primitives by this amount in mm. Used for masking out other layers.",
+                1},
+            {"only_groups", {"-g", "--only-groups"},
+                "Comma-separated list of group IDs to export.",
+                1},
+            {"vectorizer", {"-b", "--vectorizer"},
+                "Vectorizer to use for bitmap images. One of poisson-disc (default), hex-grid, square-grid, binary-contours, dev-null.",
+                1},
+            {"vectorizer_map", {"--vectorizer-map"},
+                "Map from image element id to vectorizer. Overrides --vectorizer. Format: id1=vectorizer,id2=vectorizer,...",
+                1},
+            {"force_svg", {"--force-svg"},
+                "Force SVG input irrespective of file name",
+                0},
+            {"force_png", {"--force-png"},
+                "Force bitmap graphics input irrespective of file name",
+                0},
+            {"size", {"-s", "--size"},
+                "Bitmap mode only: Physical size of output image in mm. Format: 12.34x56.78",
+                1},
+            {"sexp_mod_name", {"--sexp-mod-name"},
+                "Module name for KiCAD S-Exp output",
+                1},
+            {"sexp_layer", {"--sexp-layer"},
+                "Layer for KiCAD S-Exp output. Defaults to auto-detect layers from SVG layer/top-level group names",
+                1},
+            {"preserve_aspect_ratio", {"-a", "--preserve-aspect-ratio"},
+                "Bitmap mode only: Preserve aspect ratio of image. Allowed values are meet, slice. Can also parse full SVG preserveAspectRatio syntax.",
+                1},
+            {"skip_usvg", {"--no-usvg"},
+                "Do not preprocess input using usvg (do not use unless you know *exactly* what you're doing)",
+                0},
+            {"exclude_groups", {"-e", "--exclude-groups"},
+                "Comma-separated list of group IDs to exclude from export. Takes precedence over --only-groups.",
+                1},
+
+    }};
+
+
+    ostringstream usage;
+    usage
+        << argv[0] << " " << lib_version << endl
+        << endl
+        << "Usage: " << argv[0] << " [options]... [input_file] [output_file]" << endl
+        << endl
+        << "Specify \"-\" for stdin/stdout." << endl
+        << endl;
+
+    argagg::parser_results args;
+    try {
+        args = argparser.parse(argc, argv);
+    } catch (const std::exception& e) {
+        argagg::fmt_ostream fmt(cerr);
+        fmt << usage.str() << argparser << '\n'
+            << "Encountered exception while parsing arguments: " << e.what()
+            << '\n';
+        return EXIT_FAILURE;
+    }
+
+    if (args["help"]) {
+        argagg::fmt_ostream fmt(cerr);
+        fmt << usage.str() << argparser;
+        return EXIT_SUCCESS;
+    }
+
+    if (args["version"]) {
+        cerr << lib_version << endl;
+        return EXIT_SUCCESS;
+    }
+
+    string in_f_name;
+    istream *in_f = &cin;
+    ifstream in_f_file;
+    string out_f_name;
+    ostream *out_f = &cout;
+    ofstream out_f_file;
+
+    if (args.pos.size() >= 1) {
+        in_f_name = args.pos[0];
+
+        if (args.pos.size() >= 2) {
+            out_f_name = args.pos[1];
+        }
+    }
+
+    if (!in_f_name.empty() && in_f_name != "-") {
+        in_f_file.open(in_f_name);
+        if (!in_f_file) {
+            cerr << "Cannot open input file \"" << in_f_name << "\"" << endl;
+            return EXIT_FAILURE;
+        }
+        in_f = &in_f_file;
+    }
+
+    if (!out_f_name.empty() && out_f_name != "-") {
+        out_f_file.open(out_f_name);
+        if (!out_f_file) {
+            cerr << "Cannot open output file \"" << out_f_name << "\"" << endl;
+            return EXIT_FAILURE;
+        }
+        out_f = &out_f_file;
+    }
+
+    bool only_polys = args["no_header"];
+
+    int precision = 6;
+    if (args["precision"]) {
+        precision = atoi(args["precision"]);
+    }
+
+    string fmt = args["ofmt"] ? args["ofmt"] : "gerber";
+    transform(fmt.begin(), fmt.end(), fmt.begin(), [](unsigned char c){ return std::tolower(c); }); /* c++ yeah */
+
+    string sexp_layer = args["sexp_layer"] ? args["sexp_layer"].as<string>() : "auto";
+
+    bool force_flatten = false;
+    bool is_sexp = false;
+    PolygonSink *sink = nullptr;
+    PolygonSink *flattener = nullptr;
+    PolygonSink *dilater = nullptr;
+    if (fmt == "svg") {
+        string dark_color = args["svg_dark_color"] ? args["svg_dark_color"] : "#000000";
+        string clear_color = args["svg_clear_color"] ? args["svg_clear_color"] : "#ffffff";
+        sink = new SimpleSVGOutput(*out_f, only_polys, precision, dark_color, clear_color);
+
+    } else if (fmt == "gbr" || fmt == "grb" || fmt == "gerber") {
+        sink = new SimpleGerberOutput(*out_f, only_polys, 4, precision);
+
+    } else if (fmt == "s-exp" || fmt == "sexp" || fmt == "kicad") {
+        if (!args["sexp_mod_name"]) {
+            cerr << "--sexp-mod-name must be given for sexp export" << endl;
+            argagg::fmt_ostream fmt(cerr);
+            fmt << usage.str() << argparser;
+            return EXIT_FAILURE;
+        }
+
+        sink = new KicadSexpOutput(*out_f, args["sexp_mod_name"], sexp_layer, only_polys);
+        force_flatten = true;
+        is_sexp = true;
+
+    } else {
+        cerr << "Unknown output format \"" << fmt << "\"" << endl;
+        argagg::fmt_ostream fmt(cerr);
+        fmt << usage.str() << argparser;
+        return EXIT_FAILURE;
+    }
+
+    PolygonSink *top_sink = sink;
+
+    if (args["dilate"]) {
+        dilater = new Dilater(*top_sink, args["dilate"].as<double>());
+        top_sink = dilater;
+    }
+
+    if (args["flatten"] || (force_flatten && !args["no_flatten"])) {
+        flattener = new Flattener(*top_sink);
+        top_sink = flattener;
+    }
+
+    /* Because the C++ stdlib is bullshit */
+    auto id_match = [](string in, vector<string> &out) {
+        stringstream  ss(in);
+        while (getline(ss, out.emplace_back(), ',')) {
+        }
+        out.pop_back();
+    };
+
+    IDElementSelector sel;
+    if (args["only_groups"])
+        id_match(args["only_groups"], sel.include);
+    if (args["exclude_groups"])
+        id_match(args["exclude_groups"], sel.exclude);
+    if (is_sexp && sexp_layer == "auto") {
+        sel.layers = &gerbolyze::kicad_default_layers;
+    }
+
+    string vectorizer = args["vectorizer"] ? args["vectorizer"] : "poisson-disc";
+    /* Check argument */
+    ImageVectorizer *vec = makeVectorizer(vectorizer);
+    if (!vec) {
+        cerr << "Unknown vectorizer \"" << vectorizer << "\"." << endl;
+        argagg::fmt_ostream fmt(cerr);
+        fmt << usage.str() << argparser;
+        return EXIT_FAILURE;
+    }
+    delete vec;
+
+    double min_feature_size = 0.1; /* mm */
+    if (args["min_feature_size"]) {
+        min_feature_size = args["min_feature_size"].as<double>();
+    }
+
+    string ending = "";
+    auto idx = in_f_name.rfind(".");
+    if (idx != string::npos) {
+        ending = in_f_name.substr(idx);
+        transform(ending.begin(), ending.end(), ending.begin(), [](unsigned char c){ return std::tolower(c); }); /* c++ yeah */
+    }
+    
+    filesystem::path barf = { filesystem::temp_directory_path() /= (std::tmpnam(nullptr) + string(".svg")) };
+    filesystem::path frob = { filesystem::temp_directory_path() /= (std::tmpnam(nullptr) + string(".svg")) };
+
+    bool is_svg = args["force_svg"] || (ending == ".svg" && !args["force_png"]);
+    if (!is_svg) {
+        cerr << "writing bitmap into svg" << endl; 
+        if (!args["size"]) {
+            cerr << "Error: --size must be given when using bitmap input." << endl;
+            argagg::fmt_ostream fmt(cerr);
+            fmt << usage.str() << argparser;
+            return EXIT_FAILURE;
+        }
+
+        string sz = args["size"].as<string>();
+        auto pos = sz.find_first_of("x*,");
+        if (pos == string::npos) {
+            cerr << "Error: --size must be of form 12.34x56.78" << endl;
+            argagg::fmt_ostream fmt(cerr);
+            fmt << usage.str() << argparser;
+            return EXIT_FAILURE;
+        }
+
+        string x_str = sz.substr(0, pos);
+        string y_str = sz.substr(pos+1);
+
+        double width = std::strtod(x_str.c_str(), nullptr);
+        double height = std::strtod(y_str.c_str(), nullptr);
+
+        if (width < 1 || height < 1) {
+            cerr << "Error: --size must be of form 12.34x56.78 and values must be positive floating-point numbers in mm" << endl;
+            argagg::fmt_ostream fmt(cerr);
+            fmt << usage.str() << argparser;
+            return EXIT_FAILURE;
+        }
+
+        ofstream svg(barf.c_str());
+
+        svg << "<svg width=\"" << width << "mm\" height=\"" << height << "mm\" viewBox=\"0 0 "
+            << width << " " << height << "\" "
+            << "xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">" << endl;
+
+        string par_attr = "none";
+        if (args["preserve_aspect_ratio"]) {
+            string aspect_ratio = args["preserve_aspect_ratio"].as<string>();
+            if (aspect_ratio == "meet") {
+                par_attr = "xMidYMid meet";
+            } else if (aspect_ratio == "slice") {
+                par_attr = "xMidYMid slice";
+            } else {
+                par_attr = aspect_ratio;
+            }
+        }
+        svg << "<image width=\"" << width << "\" height=\"" << height << "\" x=\"0\" y=\"0\" preserveAspectRatio=\""
+            << par_attr << "\" xlink:href=\"data:image/png;base64,";
+        
+        /* c++ has the best hacks */
+        std::ostringstream sstr;
+        sstr << in_f->rdbuf();
+        string le_data = sstr.str();
+
+        svg << base64_encode(le_data);
+        svg << "\"/>" << endl;
+
+        svg << "</svg>" << endl;
+        svg.close();
+
+    } else { /* svg file */
+        cerr << "copying svg input into temp svg" << endl; 
+
+        /* c++ has the best hacks */
+        std::ostringstream sstr;
+        sstr << in_f->rdbuf();
+
+        ofstream tmp_out(barf.c_str());
+        tmp_out << sstr.str();
+        tmp_out.close();
+
+    }
+
+    if (args["skip_usvg"]) {
+        cerr << "skipping usvg" << endl; 
+        frob = barf;
+
+    } else {
+        cerr << "calling usvg on " << barf << " and " << frob << endl; 
+        const char *command_line[] = {"usvg", "--keep-named-groups", barf.c_str(), frob.c_str(), NULL};
+        struct subprocess_s subprocess;
+        int rc = subprocess_create(command_line, subprocess_option_inherit_environment, &subprocess);
+        if (rc) {
+            cerr << "Error calling usvg!" << endl;
+            return EXIT_FAILURE;
+        }
+
+        int usvg_rc = 0;
+        rc = subprocess_join(&subprocess, &usvg_rc);
+        if (rc) {
+            cerr << "Error calling usvg!" << endl;
+            return EXIT_FAILURE;
+        }
+        if (usvg_rc) {
+            cerr << "usvg returned an error code: " << usvg_rc << endl;
+            return EXIT_FAILURE;
+        }
+
+        rc = subprocess_destroy(&subprocess);
+        if (rc) {
+            cerr << "Error calling usvg!" << endl;
+            return EXIT_FAILURE;
+        }
+    }
+
+    VectorizerSelectorizer vec_sel(vectorizer, args["vectorizer_map"] ? args["vectorizer_map"] : "");
+    RenderSettings rset {
+        min_feature_size,
+        vec_sel,
+    };
+
+    SVGDocument doc;
+    cerr << "Loading temporary file " << frob << endl;
+    ifstream load_f(frob);
+    if (!doc.load(load_f)) {
+        cerr <<  "Error loading input file \"" << in_f_name << "\", exiting." << endl;
+        return EXIT_FAILURE;
+    }
+
+    doc.render(rset, *top_sink, &sel);
+
+    if (!is_svg) {
+        remove(frob.c_str());
+        remove(barf.c_str());
+    }
+
+    if (flattener) {
+        delete flattener;
+    }
+    if (dilater) {
+        delete dilater;
+    }
+    if (sink) {
+        delete sink;
+    }
+    return EXIT_SUCCESS;
+}
+