103     virtual void on_mouse(int x, int y, int key) {}  in on_mouse()  argument
134     drawing_area(int x, int y, int sizex, int sizey);
135     inline drawing_area(int x, int y, int sizex, int sizey, const drawing_memory &dmem);
184         unsigned y, u, v;  in get_color()  local
185         y = red * 77 + green * 150 + blue * 29; // sum(77+150+29=256) * max(=255):  limit->2^16  in get_color()
186         u = (2048 + (blue << 3) - (y >> 5)) >> 4; // (limit->2^12)>>4  in get_color()
187         v = (2048 + (red << 3) - (y >> 5)) >> 4;  in get_color()
188         y = y >> 8;  in get_color()
189         return u | (y << 8) | (v << 16) | (y << 24);  in get_color()
193 inline drawing_area::drawing_area(int x, int y, int sizex, int sizey, const drawing_memory &dmem)  in drawing_area()  argument
194         : base_index(y * dmem.sizex + x),  in drawing_area()
200           start_y(y),  in drawing_area()
204     assert(y < dmem.sizey);  in drawing_area()
206     assert(y + sizey <= dmem.sizey);  in drawing_area()