demo_svg_import.cpp File Reference

Demo of reading svg files. Build with $ make demo-import More...

#include "../../homog2d.hpp"

Include dependency graph for demo_svg_import.cpp:

Macros
#define	HOMOG2D_USE_SVG_IMPORT

Functions
int	main (int argc, const char **argv)

Detailed Description

Demo of reading svg files. Build with $ make demo-import

Then run with $ BUILD/demo_svg_import misc/test_files/France.svg or $ BUILD/demo_svg_import misc/test_files/France_Normandie.svg

This will generate a svg file in current folder that is a copy of what was read in the file.

Macro Definition Documentation

HOMOG2D_USE_SVG_IMPORT

#define HOMOG2D_USE_SVG_IMPORT

Function Documentation

main()

int main	(	int	argc,
		const char **	argv
	)

{
    tinyxml2::XMLDocument doc;
    if( argc < 2 )
    {
        std::cout << "arg missing!\n";
        return 1;
    }
    auto err = doc.LoadFile( argv[1] );
    if( err != tinyxml2::XML_SUCCESS )
    {
        std::cout << "...exiting, failed to read file '" << argv[1]  << "'\n";
        return 1;
    }

    svg::printFileAttrib( doc );

    std::pair<double,double> imSize(500.,500.);
    try
    {
        imSize = svg::getImgSize( doc );
        std::cout << "Input image size: " << imSize.first << " x " << imSize.second << '\n';
    }
    catch( const std::exception& error )
    {
        std::cout << "input file has no size, size set to 500x500\n -msg=" << error.what() << '\n';
    }

    h2d::svg::Visitor visitor;
    doc.Accept( &visitor );
    const auto& data = visitor.get();
    std::cout << argv[0] << ": Read " << data.size() << " shapes in file '" << argv[1] << "'\n";
    if( !data.size() )
    {
        std::cout << "...exiting, no data!\n";
        return 1;
    }

    img::Image<img::SvgImage> out( imSize.first, imSize.second );
    fct::DrawFunct<img::SvgImage> dfunc( out );

    auto vcolors = img::genRandomColors( data.size() );
    PointPair pp_all;
    size_t c = 0;
    for( const auto& e: data )
    {
        std::visit( dfunc, e );   // draw element

        auto ptpair = std::visit( fct::PtPairFunct{}, e );
        pp_all = getMinMax( pp_all, ptpair );

        std::cout << "Shape " << c << ": " << getString( type(e) )
            << ", size " << size(e) << "\n";

        if( type(e) != Type::Segment ) // because no BB is defined
        {
            auto bb = std::visit( fct::BBFunct{}, e );
            bb.draw( out, img::DrawParams().setColor(vcolors[c]) );
        }
        c++;
    }
    auto s = FRect(pp_all);
    out.setSize( s.width(), s.height() );
    std::cout << "min/max=" << s << '\n';

    out.write( "demo_import.svg" );
}

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