| -rw-r--r-- | agg-plot/draw_svg.h | 95 |
diff --git a/agg-plot/draw_svg.h b/agg-plot/draw_svg.h new file mode 100644 index 00000000..b5fe7889 --- /dev/null +++ b/agg-plot/draw_svg.h @@ -0,0 +1,95 @@ +#ifndef DRAW_SVG_H +#define DRAW_SVG_H + +#include "agg_basics.h" +#include "agg_color_rgba.h" +#include "my_list.h" +#include "strpp.h" + +enum svg_path_property_e { + stroke_dasharray = 0, +}; + +extern const char *svg_path_property_name[]; + +struct svg_property_item { + enum svg_path_property_e key; + const char* value; + + svg_property_item(enum svg_path_property_e k, const char *v) : key(k), value(v) { } +}; + +typedef pod_list<svg_property_item> svg_property_list; + +template <typename VertexSource> +void svg_coords_from_vs(VertexSource* vs, str& s) +{ + unsigned cmd; + double x, y; + const char * const space = " "; + const char *sep = ""; + + vs->rewind(0); + + while ((cmd = vs->vertex(&x, &y))) + { + if (agg::is_move_to(cmd)) { + s.printf_add("%sM %g,%g", sep, x, y); + } else if (agg::is_line_to(cmd)) { + s.printf_add("%s%g,%g", sep, x, y); + } else if (agg::is_close(cmd)) { + s.printf_add("%sz", sep); + } else if (agg::is_curve3(cmd)) { + vs->vertex(&x, &y); + s.printf_add("%s%g,%g", sep, x, y); + } else if (agg::is_curve4(cmd)) { + vs->vertex(&x, &y); + vs->vertex(&x, &y); + s.printf_add("%s%g,%g", sep, x, y); + } + sep = space; + } +} + +template <typename VertexSource> +void svg_curve_coords_from_vs(VertexSource* vs, str& s) +{ + unsigned cmd; + double x, y; + const char * const space = " "; + const char *sep = ""; + bool omit_line_to = false; + + vs->rewind(0); + + while ((cmd = vs->vertex(&x, &y))) + { + if (agg::is_move_to(cmd)) { + s.printf_add("%sM %g,%g", sep, x, y); + omit_line_to = true; + } else if (agg::is_line_to(cmd)) { + s.printf_add("%s%s%g,%g", sep, omit_line_to ? "" : "L ", x, y); + } else if (agg::is_curve4(cmd)) { + double x1 = x, y1 = y; + double x2, y2; + vs->vertex(&x2, &y2); + vs->vertex(&x, &y); + s.printf_add("%sC %g,%g %g,%g %g,%g", sep, x1, y1, x2, x2, x, y); + omit_line_to = false; + } else if (agg::is_curve3(cmd)) { + double x1 = x, y1 = y; + vs->vertex(&x, &y); + s.printf_add("%sQ %g,%g %g,%g", sep, x1, y1, x, y); + omit_line_to = false; + } else if (agg::is_close(cmd)) { + s.printf_add("%sz", sep); + } + sep = space; + } +} + +extern str svg_stroke_path(str& path_coords, double width, int id, agg::rgba8 c, svg_property_list* properties = 0); +extern str svg_fill_path(str& path_coords, int id, agg::rgba8 c, svg_property_list* properties = 0); +extern void format_rgb(char rgbstr[], agg::rgba8 c); + +#endif |