epswrite.h

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#ifndef EPSWRITE_H
#define EPSWRITE_H

#include "globals.h"
#include "color.h"
#include "util.h"
#include <cstdio>

#define DRAW_OFF 0
#define DRAW_GRAYSCALE 1
#define DRAW_RGB 2

/* Forward declarations to avoid including headers */
class BezierMesh;
class BoundaryMesh;
class BezierEdge;
class BezierTriangle;

struct PSCoord {
   unsigned x;
   unsigned y;
};

struct PSDrawMode {
    int mode; /* one of: DRAW_OFF, DRAW_GREYSCALE, DRAW_RGB */
    unsigned linewidth;
    float grayscale;
    Color rgbcolor;
};

class EPSWrite {
    private:
        BezierMesh *bezier_mesh;
        BoundaryMesh *bdry_mesh;
        FILE *epsfile;

        Point2D world_bot;
        Point2D world_top;
        double world_width;
        double world_height;

        Point2D view_bot, view_top;
        double view_height, view_width;

        PSCoord page_bot;
        PSCoord page_top;
        unsigned page_width;
        unsigned page_height;
        unsigned margin_width;

        PSCoord canvas_bot;
        PSCoord canvas_top;
        unsigned canvas_width;
        unsigned canvas_height;

        PSDrawMode bdry;
        PSDrawMode edges;
        PSDrawMode border;

        int shade_face_mode;
        GrayscaleMap grayscale_map;
        ColorMap rgb_map;

        void print_header();
        void set_options();
        void set_clip();

        void set_ink(const PSDrawMode &mode);
        PSCoord convert_coords(const Point2D &pt);
        void project_to_canvas();
        void draw_edge(BezierEdge *e);
        void shade_triangle(BezierTriangle *t);

        void draw_edges();
        void draw_bdry();
        void draw_border();
        void draw_faces();

    public:
        EPSWrite(BezierMesh *_bezier_mesh, BoundaryMesh *_bdry_mesh);

        //int load_rgb_map(char *filename);
        //int load_grayscale_map(char *filename);
        int map_rgbcolor(int idx, const Color &color);
        int map_grayscale(int idx, float scale);

        int set_border_draw(int mode);
        int set_border_ink(unsigned linewidth, float shade);
        int set_border_ink(unsigned linewidth, const Color &rgbcolor);

        int set_edge_draw(int mode);
        int set_edge_ink(unsigned linewidth, float shade);
        int set_edge_ink(unsigned linewidth, const Color &rgbcolor);

        int set_bdry_draw(int mode);
        int set_bdry_ink(unsigned linewidth, float shade);
        int set_bdry_ink(unsigned linewidth, const Color &rgbcolor);

        int set_face_draw(int mode);

        int set_page_dim(unsigned xmin, unsigned ymin, unsigned xmax, unsigned ymax, unsigned margin);
        int set_page_dim_inch(float xmin, float ymin, float xmax, float ymax, float margin);
        int set_world_view(const Point2D& bot, const Point2D& top);

        int write(char *epsfilename);
};

#endif /* EPSWRITE_H */

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