src/lua/gui-crosshair.cpp

   1 #include "core/instance.hpp"
   2 #include "lua/internal.hpp"
   3 #include "library/framebuffer.hpp"
   4 #include "library/lua-framebuffer.hpp"
   5 #include "library/range.hpp"
   6
   7 namespace
   8 {
   9         struct render_object_crosshair : public framebuffer::object
  10         {
  11                 render_object_crosshair(int32_t _x, int32_t _y, framebuffer::color _color, uint32_t _length) throw()
  12                         : x(_x), y(_y), color(_color), length(_length) {}
  13                 ~render_object_crosshair() throw() {}
  14                 template<bool X> void op(struct framebuffer::fb<X>& scr) throw()
  15                 {
  16                         uint32_t oX = x + scr.get_origin_x();
  17                         uint32_t oY = y + scr.get_origin_y();
  18                         range bX = (range::make_w(scr.get_width()) - oX) & range::make_b(-length, length + 1);
  19                         range bY = (range::make_w(scr.get_height()) - oY) & range::make_b(-length, length + 1);
  20                         if(bX.in(0))
  21                                 for(uint32_t r = bY.low(); r != bY.high(); r++)
  22                                         color.apply(scr.rowptr(oY + r)[oX]);
  23                         if(bY.in(0))
  24                                 for(uint32_t r = bX.low(); r != bX.high(); r++)
  25                                         color.apply(scr.rowptr(oY)[oX + r]);
  26                 }
  27                 void operator()(struct framebuffer::fb<true>& scr) throw()  { op(scr); }
  28                 void operator()(struct framebuffer::fb<false>& scr) throw() { op(scr); }
  29                 void clone(framebuffer::queue& q) const throw(std::bad_alloc) { q.clone_helper(this); }
  30         private:
  31                 int32_t x;
  32                 int32_t y;
  33                 framebuffer::color color;
  34                 uint32_t length;
  35         };
  36
  37         int crosshair(lua::state& L, lua::parameters& P)
  38         {
  39                 auto& core = CORE();
  40                 int32_t x, y;
  41                 uint32_t length;
  42                 framebuffer::color pcolor;
  43
  44                 if(!core.lua2->render_ctx) return 0;
  45
  46                 P(x, y, P.optional(length, 10), P.optional(pcolor, 0xFFFFFFU));
  47
  48                 core.lua2->render_ctx->queue->create_add<render_object_crosshair>(x, y, pcolor, length);
  49                 return 0;
  50         }
  51
  52         lua::functions LUA_crosshair_fns(lua_func_misc, "gui", {
  53                 {"crosshair", crosshair},
  54         });
  55 }