src/lua/gui-pixel.cpp

   1 #include "lua/internal.hpp"
   2 #include "library/framebuffer.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                 template<bool X> void op(struct framebuffer<X>& scr) throw()
  12                 {
  13                         color.set_palette(scr);
  14                         int32_t _x = x + scr.get_origin_x();
  15                         int32_t _y = y + scr.get_origin_y();
  16                         if(_x < 0 || static_cast<uint32_t>(_x) >= scr.get_width())
  17                                 return;
  18                         if(_y < 0 || static_cast<uint32_t>(_y) >= scr.get_height())
  19                                 return;
  20                         color.apply(scr.rowptr(_y)[_x]);
  21                 }
  22                 void operator()(struct framebuffer<true>& scr) throw()  { op(scr); }
  23                 void operator()(struct framebuffer<false>& scr) throw() { op(scr); }
  24                 void clone(render_queue& q) const throw(std::bad_alloc) { q.clone_helper(this); }
  25         private:
  26                 int32_t x;
  27                 int32_t y;
  28                 premultiplied_color color;
  29         };
  30
  31         function_ptr_luafun gui_pixel(LS, "gui.pixel", [](lua_state& L, const std::string& fname) -> int {
  32                 if(!lua_render_ctx)
  33                         return 0;
  34                 int64_t color = 0xFFFFFFU;
  35                 int32_t x = L.get_numeric_argument<int32_t>(1, fname.c_str());
  36                 int32_t y = L.get_numeric_argument<int32_t>(2, fname.c_str());
  37                 L.get_numeric_argument<int64_t>(3, color, fname.c_str());
  38                 premultiplied_color pcolor(color);
  39                 lua_render_ctx->queue->create_add<render_object_pixel>(x, y, pcolor);
  40                 return 0;
  41         });
  42 }