Reorg: move svg-flatten files into subdir

1 files changed, 0 insertions, 539 deletions

diff --git a/src/svg_doc.cpp b/src/svg_doc.cpp
deleted file mode 100644
index 3b253be..0000000
--- a/src/svg_doc.cpp
+++ /dev/null
@@ -1,539 +0,0 @@
-/*
- * This file is part of gerbolyze, a vector image preprocessing toolchain 
- * Copyright (C) 2021 Jan Sebastian Götte <gerbolyze@jaseg.de>
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- * 
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include <iostream>
-#include <fstream>
-
-#include <gerbolyze.hpp>
-#include "svg_import_defs.h"
-#include "svg_color.h"
-#include "svg_geom.h"
-#include "svg_path.h"
-#include "vec_core.h"
-
-using namespace gerbolyze;
-using namespace std;
-using namespace ClipperLib;
-
-gerbolyze::SVGDocument::~SVGDocument() {
-    if (cr)
-        cairo_destroy (cr);
-    if (surface)
-        cairo_surface_destroy (surface);
-}
-
-bool gerbolyze::SVGDocument::load(string filename, string debug_out_filename) {
-    ifstream in_f;
-    in_f.open(filename);
-
-    return in_f && load(in_f, debug_out_filename);
-}
-
-bool gerbolyze::SVGDocument::load(istream &in, string debug_out_filename) {
-    /* Load XML document */
-    auto res = svg_doc.load(in);
-    if (!res) {
-        cerr << "Cannot parse input file" << endl;
-        return false;
-    }
-
-    root_elem = svg_doc.child("svg");
-    if (!root_elem) {
-        cerr << "Input file is missing root <svg> element" << endl;
-        return false;
-    }
-
-    /* Set up the document's viewport transform */
-    istringstream vb_stream(root_elem.attribute("viewBox").value());
-    vb_stream >> vb_x >> vb_y >> vb_w >> vb_h;
-    cerr << "loaded viewbox: " << vb_x << ", " << vb_y << ", " << vb_w << ", " << vb_h << endl;
-
-    page_w = usvg_double_attr(root_elem, "width");
-    page_h = usvg_double_attr(root_elem, "height");
-    /* usvg resolves all units, but instead of outputting some reasonable absolute length like mm, it converts
-     * everything to px, which depends on usvg's DPI setting (--dpi).
-     */
-    page_w_mm = page_w / assumed_usvg_dpi * 25.4;
-    page_h_mm = page_h / assumed_usvg_dpi * 25.4;
-    if (!(page_w_mm > 0.0 && page_h_mm > 0.0 && page_w_mm < 10e3 && page_h_mm < 10e3)) {
-        cerr << "Warning: Page has zero or negative size, or is larger than 10 x 10 meters! Parsed size: " << page_w << " x " << page_h << " millimeter" << endl;
-    }
-
-    if (fabs((vb_w / page_w) / (vb_h / page_h) - 1.0) > 0.001) {
-        cerr << "Warning: Document has different document unit scale in x and y direction! Output will likely be garbage!" << endl;
-    }
-
-    /* Get the one document defs element */
-    defs_node = root_elem.child("defs");
-    if (!defs_node) {
-        cerr << "Warning: Input file is missing <defs> node" << endl;
-    }
-
-    setup_debug_output(debug_out_filename);
-    setup_viewport_clip();
-    load_clips();
-    load_patterns();
-
-    _valid = true;
-    return true;
-}
-
-const Paths *gerbolyze::SVGDocument::lookup_clip_path(const pugi::xml_node &node) {
-    string id(usvg_id_url(node.attribute("clip-path").value()));
-    if (id.empty() || !clip_path_map.contains(id)) {
-        return nullptr;
-    }
-    return &clip_path_map[id];
-}
-
-Pattern *gerbolyze::SVGDocument::lookup_pattern(const string id) {
-    if (id.empty() || !pattern_map.contains(id)) {
-        return nullptr;
-    }
-    return &pattern_map[id];
-};
-
-/* Used to convert mm values from configuration such as the minimum feature size into document units. */
-double gerbolyze::SVGDocument::mm_to_doc_units(double mm) const {
-    return mm * (vb_w / page_w_mm);
-}
-
-double gerbolyze::SVGDocument::doc_units_to_mm(double px) const {
-    return px / (vb_w / page_w_mm);
-}
-
-bool IDElementSelector::match(const pugi::xml_node &node, bool included, bool is_root) const {
-    string id = node.attribute("id").value();
-    if (is_root && layers) {
-        bool layer_match = std::find(layers->begin(), layers->end(), id) != layers->end();
-        if (!layer_match) {
-            cerr << "Rejecting layer \"" << id << "\"" << endl;
-            return false;
-        }
-    }
-
-    if (include.empty() && exclude.empty())
-        return true;
-
-    bool include_match = std::find(include.begin(), include.end(), id) != include.end();
-    bool exclude_match = std::find(exclude.begin(), exclude.end(), id) != exclude.end();
-
-    if (exclude_match || (!included && !include_match)) {
-        return false;
-    }
-
-    return true;
-}
-
-/* Recursively export all SVG elements in the given group. */
-void gerbolyze::SVGDocument::export_svg_group(const RenderSettings &rset, const pugi::xml_node &group, Paths &parent_clip_path, const ElementSelector *sel, bool included, bool is_root) {
-    /* Enter the group's coordinate system */
-    cairo_save(cr);
-    apply_cairo_transform_from_svg(cr, group.attribute("transform").value());
-    
-    /* Fetch clip path from global registry and transform it into document coordinates. */
-    Paths clip_path;
-    auto *lookup = lookup_clip_path(group);
-    if (!lookup) {
-        string id(usvg_id_url(group.attribute("clip-path").value()));
-        if (!id.empty()) {
-            cerr << "Warning: Cannot find clip path with ID \"" << group.attribute("clip-path").value() << "\" for group \"" << group.attribute("id").value() << "\"." << endl;
-        }
-
-    } else {
-        clip_path = *lookup;
-    }
-    transform_paths(cr, clip_path);
-
-    /* Clip against parent's clip path (both are now in document coordinates) */
-    if (!parent_clip_path.empty()) {
-        if (!clip_path.empty()) {
-            combine_clip_paths(parent_clip_path, clip_path, clip_path);
-        } else {
-            clip_path = parent_clip_path;
-        }
-    }
-
-    /* Iterate over the group's children, exporting them one by one. */
-    for (const auto &node : group.children()) {
-        if (sel && !sel->match(node, included, is_root))
-            continue;
-
-        string name(node.name());
-        if (name == "g") {
-            if (is_root) { /* Treat top-level groups as "layers" like inkscape does. */
-                cerr << "Forwarding layer name to sink: \"" << node.attribute("id").value() << "\"" << endl;
-                LayerNameToken tok { node.attribute("id").value() };
-                *polygon_sink << tok;
-            }
-
-            export_svg_group(rset, node, clip_path, sel, true);
-            
-            if (is_root) {
-                LayerNameToken tok {""};
-                *polygon_sink << tok;
-            }
-
-        } else if (name == "path") {
-            export_svg_path(rset, node, clip_path);
-
-        } else if (name == "image") {
-            ImageVectorizer *vec = rset.m_vec_sel.select(node);
-            if (!vec) {
-                cerr << "Cannot resolve vectorizer for node \"" << node.attribute("id").value() << "\"" << endl;
-                continue;
-            }
-
-            double min_feature_size_px = mm_to_doc_units(rset.m_minimum_feature_size_mm);
-            vec->vectorize_image(cr, node, clip_path, viewport_matrix, *polygon_sink, min_feature_size_px);
-            delete vec;
-
-        } else if (name == "defs") {
-            /* ignore */
-        } else {
-            cerr << "  Unexpected child: <" << node.name() << ">" << endl;
-        }
-    }
-
-    cairo_restore(cr);
-}
-
-/* Export an SVG path element to gerber. Apply patterns and clip on the fly. */
-void gerbolyze::SVGDocument::export_svg_path(const RenderSettings &rset, const pugi::xml_node &node, Paths &clip_path) {
-    enum gerber_color fill_color = gerber_fill_color(node);
-    enum gerber_color stroke_color = gerber_stroke_color(node);
-
-    double stroke_width = usvg_double_attr(node, "stroke-width", /* default */ 1.0);
-    assert(stroke_width > 0.0);
-    enum ClipperLib::EndType end_type = clipper_end_type(node);
-    enum ClipperLib::JoinType join_type = clipper_join_type(node);
-    vector<double> dasharray;
-    parse_dasharray(node, dasharray);
-    /* TODO add stroke-miterlimit */
-
-    if (!fill_color && !stroke_color) { /* Ignore "transparent" paths */
-        return;
-    }
-
-    /* Load path from SVG path data and transform into document units. */
-    PolyTree ptree;
-    cairo_save(cr);
-    apply_cairo_transform_from_svg(cr, node.attribute("transform").value());
-    load_svg_path(cr, node, ptree);
-    cairo_restore (cr);
-
-    Paths open_paths, closed_paths;
-    OpenPathsFromPolyTree(ptree, open_paths);
-    ClosedPathsFromPolyTree(ptree, closed_paths);
-
-    /* Skip filling for transparent fills */
-    if (fill_color) {
-        /* Clip paths. Consider all paths closed for filling. */
-        if (!clip_path.empty()) {
-            Clipper c;
-            c.AddPaths(open_paths, ptSubject, /* closed */ false);
-            c.AddPaths(closed_paths, ptSubject, /* closed */ true);
-            c.AddPaths(clip_path, ptClip, /* closed */ true);
-            c.StrictlySimple(true);
-            /* fill rules are nonzero since both subject and clip have already been normalized by clipper. */ 
-            c.Execute(ctIntersection, ptree, pftNonZero, pftNonZero);
-        }
-
-        /* Call out to pattern tiler for pattern fills. The path becomes the clip here. */
-        if (fill_color == GRB_PATTERN_FILL) {
-            string fill_pattern_id = usvg_id_url(node.attribute("fill").value());
-            Pattern *pattern = lookup_pattern(fill_pattern_id);
-            if (!pattern) {
-                cerr << "Warning: Fill pattern with id \"" << fill_pattern_id << "\" not found." << endl;
-
-            } else {
-                Paths clip;
-                PolyTreeToPaths(ptree, clip);
-                pattern->tile(rset, clip);
-            }
-
-        } else { /* solid fill */
-            Paths f_polys;
-            /* Important for gerber spec compliance and also for reliable rendering results irrespective of board house
-             * and gerber viewer. */
-            dehole_polytree(ptree, f_polys);
-
-            /* Export SVG */
-            cairo_save(cr);
-            cairo_set_matrix(cr, &viewport_matrix);
-            cairo_new_path(cr);
-            ClipperLib::cairo::clipper_to_cairo(f_polys, cr, CAIRO_PRECISION, ClipperLib::cairo::tNone);
-            if (fill_color == GRB_DARK) {
-                cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, dbg_fill_alpha);
-            } else { /* GRB_CLEAR */
-                cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, dbg_fill_alpha);
-            }
-            cairo_fill (cr);
-
-            /* export gerber */
-            cairo_identity_matrix(cr);
-            for (const auto &poly : f_polys) {
-                vector<array<double, 2>> out;
-                for (const auto &p : poly)
-                    out.push_back(std::array<double, 2>{
-                            ((double)p.X) / clipper_scale, ((double)p.Y) / clipper_scale
-                            });
-                *polygon_sink << (fill_color == GRB_DARK ? GRB_POL_DARK : GRB_POL_CLEAR) << out;
-            }
-            cairo_restore(cr);
-        }
-    }
-
-    if (stroke_color && stroke_width > 0.0) {
-        ClipperOffset offx;
-        offx.ArcTolerance = 0.01 * clipper_scale; /* 10µm; TODO: Make this configurable */
-
-        /* For stroking we have to separately handle open and closed paths */
-        for (const auto &poly : closed_paths) {
-            if (poly.empty()) /* do we need this? */
-                continue;
-
-            /* Special case: A closed path becomes a number of open paths when it is dashed. */
-            if (dasharray.empty()) {
-                offx.AddPath(poly, join_type, etClosedLine);
-
-            } else {
-                Path poly_copy(poly);
-                poly_copy.push_back(poly[0]);
-                Paths out;
-                dash_path(poly_copy, out, dasharray);
-                offx.AddPaths(out, join_type, end_type);
-            }
-        }
-
-        for (const auto &poly : open_paths) {
-            Paths out;
-            dash_path(poly, out, dasharray);
-            offx.AddPaths(out, join_type, end_type);
-        }
-
-        /* Execute clipper offset operation to generate stroke outlines */
-        offx.Execute(ptree, 0.5 * stroke_width * clipper_scale);
-
-        /* Clip. Note that after the outline, all we have is closed paths as any open path's stroke outline is itself
-         * a closed path. */
-        if (!clip_path.empty()) {
-            Clipper c;
-
-            Paths outline_paths;
-            PolyTreeToPaths(ptree, outline_paths);
-            c.AddPaths(outline_paths, ptSubject, /* closed */ true);
-            c.AddPaths(clip_path, ptClip, /* closed */ true);
-            c.StrictlySimple(true);
-            /* fill rules are nonzero since both subject and clip have already been normalized by clipper. */ 
-            c.Execute(ctIntersection, ptree, pftNonZero, pftNonZero);
-        }
-
-        /* Call out to pattern tiler for pattern strokes. The stroke's outline becomes the clip here. */
-        if (stroke_color == GRB_PATTERN_FILL) {
-            string stroke_pattern_id = usvg_id_url(node.attribute("stroke").value());
-            Pattern *pattern = lookup_pattern(stroke_pattern_id);
-            if (!pattern) {
-                cerr << "Warning: Fill pattern with id \"" << stroke_pattern_id << "\" not found." << endl;
-
-            } else {
-                Paths clip;
-                PolyTreeToPaths(ptree, clip);
-                pattern->tile(rset, clip);
-            }
-
-        } else {
-            Paths s_polys;
-            dehole_polytree(ptree, s_polys);
-
-            /* Export debug svg */
-            cairo_save(cr);
-            cairo_set_matrix(cr, &viewport_matrix);
-            cairo_new_path(cr);
-            ClipperLib::cairo::clipper_to_cairo(s_polys, cr, CAIRO_PRECISION, ClipperLib::cairo::tNone);
-            if (stroke_color == GRB_DARK) {
-                cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, dbg_stroke_alpha);
-            } else { /* GRB_CLEAR */
-                cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, dbg_stroke_alpha);
-            }
-            cairo_fill (cr);
-
-            /* export gerber */
-            cairo_identity_matrix(cr);
-            for (const auto &poly : s_polys) {
-                vector<array<double, 2>> out;
-                for (const auto &p : poly)
-                    out.push_back(std::array<double, 2>{
-                            ((double)p.X) / clipper_scale, ((double)p.Y) / clipper_scale
-                            });
-                *polygon_sink << (stroke_color == GRB_DARK ? GRB_POL_DARK : GRB_POL_CLEAR) << out;
-            }
-            cairo_restore(cr);
-        }
-    }
-}
-
-void gerbolyze::SVGDocument::render(const RenderSettings &rset, PolygonSink &sink, const ElementSelector *sel) {
-    assert(_valid);
-    /* Export the actual SVG document to both SVG for debuggin and to gerber. We do this as we go, i.e. we immediately
-     * process each element to gerber as we encounter it instead of first rendering everything to a giant list of gerber
-     * primitives and then serializing those later. Exporting them on the fly saves a ton of memory and is much faster.
-     */
-    polygon_sink = &sink;
-    sink.header({vb_x, vb_y}, {vb_w, vb_h});
-    ClipperLib::Clipper c;
-    c.AddPaths(vb_paths, ptSubject, /* closed */ true);
-    ClipperLib::IntRect bbox = c.GetBounds();
-    cerr << "document viewbox clip: bbox={" << bbox.left << ", " << bbox.top << "} - {" << bbox.right << ", " << bbox.bottom << "}" << endl;
-    export_svg_group(rset, root_elem, vb_paths, sel, false, true);
-    sink.footer();
-}
-
-void gerbolyze::SVGDocument::render_to_list(const RenderSettings &rset, vector<pair<Polygon, GerberPolarityToken>> &out, const ElementSelector *sel) {
-    LambdaPolygonSink sink([&out](const Polygon &poly, GerberPolarityToken pol) {
-            out.emplace_back(pair<Polygon, GerberPolarityToken>{poly, pol});
-        });
-    render(rset, sink, sel);
-}
-
-void gerbolyze::SVGDocument::setup_debug_output(string filename) {
-    /* Setup cairo to draw into a SVG surface (for debugging). For actual rendering, something like a recording surface
-     * would work fine, too. */
-    /* Cairo expects the SVG surface size to be given in pt (72.0 pt = 1.0 in = 25.4 mm) */
-    const char *fn = filename.empty() ? nullptr : filename.c_str();
-    assert (!cr);
-    assert (!surface);
-    surface = cairo_svg_surface_create(fn, page_w_mm / 25.4 * 72.0, page_h_mm / 25.4 * 72.0);
-    cr = cairo_create (surface);
-    /* usvg returns "pixels", cairo thinks we draw "points" at 72.0 pt per inch. */
-    cairo_scale(cr, page_w / vb_w * 72.0 / assumed_usvg_dpi, page_h / vb_h * 72.0 / assumed_usvg_dpi);
-
-    cairo_translate(cr, -vb_x, -vb_y);
-
-    /* Store viewport transform and reset cairo's active transform. We have to do this since we have to render out all
-     * gerber primitives in mm, not px and most gerber primitives we export pass through Cairo at some point.
-     *
-     * We manually apply this viewport transform every time for debugging we actually use Cairo to export SVG. */
-    cairo_get_matrix(cr, &viewport_matrix);
-    cairo_identity_matrix(cr);
-
-    cairo_set_line_width (cr, 0.1);
-    cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 1.0);
-}
-
-void gerbolyze::SVGDocument::setup_viewport_clip() {
-    /* Set up view port clip path */
-    Path vb_path;
-    for (auto &elem : vector<pair<double, double>> {{vb_x, vb_y}, {vb_x+vb_w, vb_y}, {vb_x+vb_w, vb_y+vb_h}, {vb_x, vb_y+vb_h}}) {
-        double x = elem.first, y = elem.second;
-        vb_path.push_back({ (cInt)round(x * clipper_scale), (cInt)round(y * clipper_scale) });
-    }
-    vb_paths.push_back(vb_path);
-
-    ClipperLib::Clipper c;
-    c.AddPaths(vb_paths, ptSubject, /* closed */ true);
-}
-
-void gerbolyze::SVGDocument::load_patterns() {
-    /* Set up document-wide pattern registry. Load patterns from <defs> node. */
-    for (const auto &node : defs_node.children("pattern")) {
-        pattern_map.emplace(std::piecewise_construct, std::forward_as_tuple(node.attribute("id").value()), std::forward_as_tuple(node, *this));
-    }
-}
-
-void gerbolyze::SVGDocument::load_clips() {
-    /* Set up document-wide clip path registry: Extract clip path definitions from <defs> element */
-    for (const auto &node : defs_node.children("clipPath")) {
-        cairo_save(cr);
-        apply_cairo_transform_from_svg(cr, node.attribute("transform").value());
-
-        string meta_clip_path_id(usvg_id_url(node.attribute("clip-path").value()));
-        Clipper c;
-
-        /* The clipPath node can only contain <path> children. usvg converts all geometric objects (rect etc.) to
-         * <path>s. Raster images are invalid inside a clip path. usvg removes all groups that are not relevant to
-         * rendering, and the only way a group might stay is if it affects rasterization (e.g. through mask, clipPath).
-         */
-        for (const auto &child : node.children("path")) {
-            PolyTree ptree;
-            cairo_save(cr);
-            /* TODO: we currently only support clipPathUnits="userSpaceOnUse", not "objectBoundingBox". */
-            apply_cairo_transform_from_svg(cr, child.attribute("transform").value());
-            load_svg_path(cr, child, ptree);
-            cairo_restore (cr);
-
-            Paths paths;
-            PolyTreeToPaths(ptree, paths);
-            c.AddPaths(paths, ptSubject, /* closed */ false);
-        }
-
-        /* Support clip paths that themselves have clip paths */
-        if (!meta_clip_path_id.empty()) {
-            if (clip_path_map.contains(meta_clip_path_id)) {
-                /* all clip paths must be closed */
-                c.AddPaths(clip_path_map[meta_clip_path_id], ptClip, /* closed */ true);
-
-            } else {
-                cerr << "Warning: Cannot find clip path with ID \"" << meta_clip_path_id << "\", ignoring." << endl;
-            }
-        }
-
-        PolyTree ptree;
-        c.StrictlySimple(true);
-        /* This unions all child <path>s together and at the same time applies any meta clip path. */
-        /* The fill rules are both nonzero since both subject and clip have already been normalized by clipper. */ 
-        c.Execute(ctUnion, ptree, pftNonZero, pftNonZero);
-        /* Insert into document clip path map */
-        PolyTreeToPaths(ptree, clip_path_map[node.attribute("id").value()]);
-
-        cairo_restore(cr);
-    }
-}
-
-/* Note: These values come from KiCAD's common/lset.cpp. KiCAD uses *multiple different names* for the same layer in
- * different places, and not all of them are stable. Sometimes, these names change without notice. If this list isn't
- * up-to-date, it's not my fault. Still, please file an issue. */
-const std::vector<std::string> gerbolyze::kicad_default_layers ({
-        /* Copper */
-        "F.Cu",
-        "In1.Cu", "In2.Cu", "In3.Cu", "In4.Cu", "In5.Cu", "In6.Cu", "In7.Cu", "In8.Cu",
-        "In9.Cu", "In10.Cu", "In11.Cu", "In12.Cu", "In13.Cu", "In14.Cu", "In15.Cu", "In16.Cu",
-        "In17.Cu", "In18.Cu", "In19.Cu", "In20.Cu", "In21.Cu", "In22.Cu", "In23.Cu",
-        "In24.Cu", "In25.Cu", "In26.Cu", "In27.Cu", "In28.Cu", "In29.Cu", "In30.Cu",
-        "B.Cu",
-
-        /* Technical layers */
-        "B.Adhes", "F.Adhes",
-        "B.Paste", "F.Paste",
-        "B.SilkS", "F.SilkS",
-        "B.Mask", "F.Mask",
-
-        /* User layers */
-        "Dwgs.User",
-        "Cmts.User",
-        "Eco1.User", "Eco2.User",
-        "Edge.Cuts",
-        "Margin",
-
-        /* Footprint layers */
-        "F.CrtYd", "B.CrtYd",
-        "F.Fab", "B.Fab",
-
-        /* Layers for user scripting etc. */
-        "User.1", "User.2", "User.3", "User.4", "User.5", "User.6", "User.7", "User.8", "User.9",
-        });