svg_parser.h

Go to the documentation of this file.

/* === S Y N F I G ========================================================= */
/* ========================================================================= */

/* === S T A R T =========================================================== */

#ifndef __SVG_PARSER_H
#define __SVG_PARSER_H

/* === H E A D E R S ======================================================= */

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <glibmm/ustring.h>

#include <libxml++/libxml++.h>
#include <ETL/angle>
#include <ETL/stringf>
#include <synfig/canvas.h>
#include <synfig/loadcanvas.h>
#include <synfig/color.h>
#include <synfig/gamma.h>
#include <synfig/guid.h>

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfig{

typedef struct matrix_t{
    float a,c,e;
    float b,d,f;
}SVGMatrix;

typedef struct stop_t{
     float r,g,b;
     float a;
     float pos;
}ColorStop;
typedef struct linear_g{
    char name[80];
    float x1,x2,y1,y2;
    std::list<ColorStop*> *stops;
    SVGMatrix *transform;
}LinearGradient;
typedef struct radial_g{
    char name[80];
    float cx,cy;//center point
    //float fx,fy; //not supported by Synfig
    float r; //radius
    std::list<ColorStop*> *stops;
    SVGMatrix *transform;
}RadialGradient;

typedef struct url_t{
    int type;
    void* data;
}URL;

typedef struct Vertex_t{
    float x,y;
    float radius1,angle1;
    float radius2,angle2;
    bool split;
}Vertex;

typedef struct bline_t{
    std::list<Vertex*> *points;
    bool loop;
    String* bline_id;
    String* offset_id;
}BLine;

class Svg_parser
{
        //this is inkscape oriented in some cases
public:

private:
        Gamma gamma;
        String filepath;
        String id_name;
        xmlpp::DomParser parser;
        xmlpp::Document document;
        xmlpp::Element* nodeRoot;//output
        Glib::ustring width;
        Glib::ustring height;
        Glib::ustring docname;
        int uid;
        int kux,set_canvas;
        float ox,oy;
        //urls
        std::list<LinearGradient*> lg;
        std::list<RadialGradient*> rg;

public:
        Svg_parser();
        Canvas::Handle load_svg_canvas(std::string _filepath,String &errors, String &warnings);
        //String get_id();
        //void set_id(String source);

private:
        ChangeLocale locale;
    
        /* === PARSERS ==================================== */
        void parser_node(const xmlpp::Node* node);
        //parser headers
        void parser_svg(const xmlpp::Node* node);
        void parser_canvas(const xmlpp::Node* node);
        void parser_graphics(const xmlpp::Node* node,xmlpp::Element* root,String parent_style,SVGMatrix* mtx_parent);

        /* === LAYER PARSERS ============================== */
        void parser_layer(const xmlpp::Node* node,xmlpp::Element* root,String parent_style,SVGMatrix* mtx);
        void parser_rect(const xmlpp::Element* nodeElement,xmlpp::Element* root,String fill, String fill_opacity, String opacity);
        /* === CONVERT TO PATH PARSERS ==================== */
        std::list<BLine *> parser_path_polygon(Glib::ustring polygon_points, SVGMatrix* mtx);
        std::list<BLine *> parser_path_d(String path_d,SVGMatrix* mtx);

        /* === EFFECTS PARSERS ============================ */
        void parser_effects(const xmlpp::Element* nodeElement,xmlpp::Element* root,String parent_style,SVGMatrix* mtx);

        /* === DEFS PARSERS =============================== */
        void parser_defs(const xmlpp::Node* node);
        void parser_linearGradient(const xmlpp::Node* node);
        void parser_radialGradient(const xmlpp::Node* node);
        ColorStop* newColorStop(String color,float opacity,float pos);
        LinearGradient* newLinearGradient(String name,float x1,float y1, float x2,float y2,std::list<ColorStop*> *stops, SVGMatrix* transform);
        RadialGradient* newRadialGradient(String name,float cx,float cy,float r,std::list<ColorStop*> *stops, SVGMatrix* transform);
        BLine* newBLine(std::list<Vertex*> *points,bool loop);

        /* === BUILDS ===================================== */
        void build_transform(xmlpp::Element* root,SVGMatrix* mtx);
        std::list<ColorStop*>* find_colorStop(String name);
        void build_fill(xmlpp::Element* root, String name,SVGMatrix *mtx);
        void build_linearGradient(xmlpp::Element* root,LinearGradient* data,SVGMatrix* mtx);
        void build_radialGradient(xmlpp::Element* root,RadialGradient* data,SVGMatrix* mtx);
        void build_stop_color(xmlpp::Element* root, std::list<ColorStop*> *stops);
        void build_stop_color(xmlpp::Element* root, std::list<ColorStop*> *stops,String name);
        Color adjustGamma(float r,float g,float b,float a);

        void build_gamma(xmlpp::Element* root,float gamma);
        void build_rotate(xmlpp::Element* root,float dx,float dy,float angle);
        void build_translate(xmlpp::Element* root,float dx,float dy);
        void build_points(xmlpp::Element* root,std::list<Vertex*> p);
        void build_vertex(xmlpp::Element* root , Vertex *p);
        void build_bline(xmlpp::Element* root,std::list<Vertex*> p,bool loop,String blineguid);
        void build_param (xmlpp::Element* root,String name,String type,String value);
        void build_param (xmlpp::Element* root,String name,String type,float value);
        void build_param (xmlpp::Element* root,String name,String type,int value);
        void build_integer (xmlpp::Element* root,String name, int value);
        void build_real (xmlpp::Element* root,String name,float value);
        void build_vector (xmlpp::Element* root,String name,float x,float y);
        void build_vector (xmlpp::Element* root,String name,float x,float y,String guid);
        void build_color(xmlpp::Element* root,float r,float g,float b,float a);
        xmlpp::Element* nodeStartBasicLayer(xmlpp::Element* root);
        xmlpp::Element* nodeStartBasicLayer(xmlpp::Element* root, String name);

        /* === COORDINATES & TRANSFORMATIONS ============== */

        //points,etc
        void coor2vect(float *x,float *y);
        void setTg2(Vertex* p,float p1x,float p1y,float p2x,float p2y);
        void setTg1(Vertex *p,float p1x,float p1y,float p2x,float p2y);
        void setSplit(Vertex* p,bool val);
        int isFirst(Vertex* nodo,float a, float b);
        Vertex* newVertex(float x,float y);

        //matrix operations
        SVGMatrix* parser_transform(const String transform);
        SVGMatrix* newSVGMatrix(float a,float b,float c,float d,float e,float f);
        SVGMatrix* newSVGMatrix(const String mvector);
        SVGMatrix* newSVGMatrix(SVGMatrix *a);
        void transformPoint2D(SVGMatrix *mtx,float *a,float *b);
        bool matrixIsNull(SVGMatrix* mtx);
        void composeSVGMatrix(SVGMatrix **mtx,SVGMatrix *mtx1,SVGMatrix *mtx2);
        void multiplySVGMatrix(SVGMatrix **mtx1,SVGMatrix *mtx2);
        float getRadian(float sexa);

        /* === EXTRA METHODS ============================== */

        //attributes
        int extractSubAttribute(const String attribute, String name,String* value);
        String loadAttribute(String name,const String path_style,const String master_style,const String subattribute,const String defaultVal);
        String loadAttribute(String name,const String path_style,const String master_style,const String defaultVal);
        std::vector<String> get_tokens_path(String path);
        int randomLetter();
        int getRed(String hex);
        int getGreen(String hex);
        int getBlue(String hex);
        int hextodec(String hex);
        int getColor(String name, int position);
        float getDimension(const String ac);
        //string functions
        void removeS(String *input);
        void removeIntoS(String *input);
        std::vector<String> tokenize(const String& str,const String& delimiters);
        void get_canvas_name(String _filepath);
        String new_guid();
};
// END of Svg_parser class

/* === E X T E R N S ======================================================= */

extern Canvas::Handle open_svg(std::string _filepath,String &errors, String &warnings);

}; // END of namespace synfig

/* === E N D =============================================================== */

#endif