lua/gui-circle.cpp

   1 #include "lua-int.hpp"
   2 #include "render.hpp"
   3
   4 namespace
   5 {
   6         struct render_object_circle : public render_object
   7         {
   8                 render_object_circle(int32_t _x, int32_t _y, uint32_t _radius,
   9                         premultiplied_color _outline, premultiplied_color _fill, uint32_t _thickness) throw()
  10                         : x(_x), y(_y), outline(_outline), fill(_fill)
  11                         {
  12                                 radius = _radius;
  13                                 radius2 = static_cast<uint64_t>(_radius) * _radius;
  14                                 if(_thickness > _radius)
  15                                         iradius2 = 0;
  16                                 else
  17                                         iradius2 = static_cast<uint64_t>(_radius - _thickness) *
  18                                                 (_radius - _thickness);
  19                         }
  20                 ~render_object_circle() throw() {}
  21                 void operator()(struct screen& scr) throw()
  22                 {
  23                         int32_t xmin = -radius;
  24                         int32_t xmax = radius;
  25                         int32_t ymin = -radius;
  26                         int32_t ymax = radius;
  27                         clip_range(scr.originx, scr.width, x, xmin, xmax);
  28                         clip_range(scr.originy, scr.height, y, ymin, ymax);
  29                         for(int32_t r = ymin; r < ymax; r++) {
  30                                 uint64_t pd2 = static_cast<int64_t>(r) * r;
  31                                 uint32_t* rptr = scr.rowptr(y + r + scr.originy);
  32                                 size_t eptr = x + xmin + scr.originx;
  33                                 for(int32_t c = xmin; c < xmax; c++, eptr++) {
  34                                         uint64_t fd2 = pd2 + static_cast<int64_t>(c) * c;
  35                                         if(fd2 > radius2)
  36                                                 continue;
  37                                         else if(fd2 >= iradius2)
  38                                                 outline.apply(rptr[eptr]);
  39                                         else
  40                                                 fill.apply(rptr[eptr]);
  41                                 }
  42                         }
  43                 }
  44         private:
  45                 int32_t x;
  46                 int32_t y;
  47                 int32_t radius;
  48                 uint64_t radius2;
  49                 uint64_t iradius2;
  50                 premultiplied_color outline;
  51                 premultiplied_color fill;
  52         };
  53
  54         function_ptr_luafun gui_rectangle("gui.circle", [](lua_State* LS, const std::string& fname) -> int {
  55                 if(!lua_render_ctx)
  56                         return 0;
  57                 int64_t outline = 0xFFFFFFU;
  58                 int64_t fill = -1;
  59                 uint32_t thickness = 1;
  60                 int32_t x = get_numeric_argument<int32_t>(LS, 1, fname.c_str());
  61                 int32_t y = get_numeric_argument<int32_t>(LS, 2, fname.c_str());
  62                 uint32_t radius = get_numeric_argument<uint32_t>(LS, 3, fname.c_str());
  63                 get_numeric_argument<uint32_t>(LS, 4, thickness, fname.c_str());
  64                 get_numeric_argument<int64_t>(LS, 5, outline, fname.c_str());
  65                 get_numeric_argument<int64_t>(LS, 6, fill, fname.c_str());
  66                 premultiplied_color poutline(outline);
  67                 premultiplied_color pfill(fill);
  68                 lua_render_ctx->queue->add(*new render_object_circle(x, y, radius, poutline, pfill, thickness));
  69                 return 0;
  70         });
  71 }