Welcome to the Lounge

svg_doc_builder builder;
svg_shape_info si;
si.stroke.color = color<rgba_pixel<32>>::white;
si.fill.type = svg_paint_type::color;
si.fill.color = color<rgba_pixel<32>>::red;
gfx_result res = builder.add_ellipse({20,20},{10,10},si);
if(res!=gfx_result::success) {
    printf("Error: %d\r\n",(int)res);
    return 1;
}
svg_doc doc;
builder.to_doc({40,40}, &doc);

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class svg_path_builder final {
    void* (*m_allocator)(size_t);
    void* (*m_reallocator)(void*, size_t);
    void (*m_deallocator)(void*);
    float* m_begin;
    size_t m_size;
    size_t m_capacity;
    rectf m_cp;
    void do_free();
    void do_copy(const svg_path_builder& rhs);
    void do_move(svg_path_builder& rhs);
    gfx_result add_point(pointf pt);
    gfx_result move_to_impl(pointf pt);
    gfx_result line_to_impl(pointf pt);
    gfx_result cubic_bezier_to_impl(pointf pt, const rectf& cp);
   public:
    svg_path_builder(void*(allocator)(size_t) = ::malloc, void*(reallocator)(void*, size_t) = ::realloc, void(deallocator)(void*) = ::free);
    svg_path_builder(const svg_path_builder& rhs);
    svg_path_builder& operator=(const svg_path_builder& rhs);
    svg_path_builder(svg_path_builder&& rhs);
    svg_path_builder& operator=(svg_path_builder&& rhs);
    ~svg_path_builder();
    size_t size() const;
    void clear(bool keep_capacity=true);
    size_t capacity() const;
    float* begin();
    float* end();
    const float* cbegin() const;
    const float* cend() const;
    gfx_result move_to(pointf location, bool relative=false);
    gfx_result line_to(pointf location, bool relative=false);
    gfx_result cubic_bezier_to(pointf location, const rectf& control_points, bool relative=false);
    gfx_result quad_bezier_to(pointf location, pointf control_point,bool relative=false);
    gfx_result arc_to(pointf location, sizef radius, float x_angle, bool large_arc, svg_sweep_direction sweep_direction, bool relative=false);
    svg_path* to_path(bool closed = false, const svg_transform* xform = nullptr) const;
};