lua/gui-pixel.cpp

   1 #include "lua-int.hpp"
   2 #include "render.hpp"
   3
   4 namespace
   5 {
   6         struct render_object_pixel : public render_object
   7         {
   8                 render_object_pixel(int32_t _x, int32_t _y, premultiplied_color _color) throw()
   9                         : x(_x), y(_y), color(_color) {}
  10                 ~render_object_pixel() throw() {}
  11                 void operator()(struct screen& scr) throw()
  12                 {
  13                         int32_t _x = x + scr.originx;
  14                         int32_t _y = y + scr.originy;
  15                         if(_x < 0 || static_cast<uint32_t>(_x) >= scr.width)
  16                                 return;
  17                         if(_y < 0 || static_cast<uint32_t>(_y) >= scr.height)
  18                                 return;
  19                         color.apply(scr.rowptr(_y)[_x]);
  20                 }
  21         private:
  22                 int32_t x;
  23                 int32_t y;
  24                 premultiplied_color color;
  25         };
  26
  27         function_ptr_luafun gui_pixel("gui.pixel", [](lua_State* LS, const std::string& fname) -> int {
  28                 if(!lua_render_ctx)
  29                         return 0;
  30                 int64_t color = 0xFFFFFFU;
  31                 int32_t x = get_numeric_argument<int32_t>(LS, 1, fname.c_str());
  32                 int32_t y = get_numeric_argument<int32_t>(LS, 2, fname.c_str());
  33                 get_numeric_argument<int64_t>(LS, 3, color, fname.c_str());
  34                 premultiplied_color pcolor(color);
  35                 lua_render_ctx->queue->add(*new render_object_pixel(x, y, pcolor));
  36                 return 0;
  37         });
  38 }