src/lua/gui-pixel.cpp

   1 #include "lua/internal.hpp"
   2 #include "library/framebuffer.hpp"
   3 #include "library/lua-framebuffer.hpp"
   4
   5 namespace
   6 {
   7         struct render_object_pixel : public framebuffer::object
   8         {
   9                 render_object_pixel(int32_t _x, int32_t _y, framebuffer::color _color) throw()
  10                         : x(_x), y(_y), color(_color) {}
  11                 ~render_object_pixel() throw() {}
  12                 template<bool X> void op(struct framebuffer::fb<X>& scr) throw()
  13                 {
  14                         color.set_palette(scr);
  15                         int32_t _x = x + scr.get_origin_x();
  16                         int32_t _y = y + scr.get_origin_y();
  17                         if(_x < 0 || static_cast<uint32_t>(_x) >= scr.get_width())
  18                                 return;
  19                         if(_y < 0 || static_cast<uint32_t>(_y) >= scr.get_height())
  20                                 return;
  21                         color.apply(scr.rowptr(_y)[_x]);
  22                 }
  23                 void operator()(struct framebuffer::fb<true>& scr) throw()  { op(scr); }
  24                 void operator()(struct framebuffer::fb<false>& scr) throw() { op(scr); }
  25                 void clone(framebuffer::queue& q) const throw(std::bad_alloc) { q.clone_helper(this); }
  26         private:
  27                 int32_t x;
  28                 int32_t y;
  29                 framebuffer::color color;
  30         };
  31
  32         int pixel(lua::state& L, lua::parameters& P)
  33         {
  34                 int32_t x, y;
  35                 framebuffer::color pcolor;
  36
  37                 if(!lua_render_ctx) return 0;
  38
  39                 P(x, y, P.optional(pcolor, 0xFFFFFFU));
  40
  41                 lua_render_ctx->queue->create_add<render_object_pixel>(x, y, pcolor);
  42                 return 0;
  43         }
  44
  45         lua::functions pixel_fns(lua_func_misc, "gui", {
  46                 {"pixel", pixel},
  47         });
  48 }