src/lua/gui-pixel.cpp

   1 #include "core/instance.hpp"
   2 #include "lua/internal.hpp"
   3 #include "library/framebuffer.hpp"
   4 #include "library/lua-framebuffer.hpp"
   5
   6 namespace
   7 {
   8         struct render_object_pixel : public framebuffer::object
   9         {
  10                 render_object_pixel(int32_t _x, int32_t _y, framebuffer::color _color) throw()
  11                         : x(_x), y(_y), color(_color) {}
  12                 ~render_object_pixel() throw() {}
  13                 template<bool X> void op(struct framebuffer::fb<X>& scr) throw()
  14                 {
  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                 auto& core = CORE();
  35                 int32_t x, y;
  36                 framebuffer::color pcolor;
  37
  38                 if(!core.lua2->render_ctx) return 0;
  39
  40                 P(x, y, P.optional(pcolor, 0xFFFFFFU));
  41
  42                 core.lua2->render_ctx->queue->create_add<render_object_pixel>(x, y, pcolor);
  43                 return 0;
  44         }
  45
  46         lua::functions LUA_pixel_fns(lua_func_misc, "gui", {
  47                 {"pixel", pixel},
  48         });
  49 }