Provided by: libdrawtk-dev_2.0-2ubuntu1_amd64 bug


       dtk_create_triangle_2p, dtk_create_rectangle_hw - Create and modify rectangular shapes


       #include <drawtk.h>

       dtk_hshape dtk_create_rectangle_2p(dtk_hshape shp,
                       float p1_x, float p1_y, float p2_x, float p2_y,
                       int filled, const float *color);
       dtk_hshape dtk_create_rectangle_hw(dtk_hshape shp,
                       float cx, float cy, float h, float w,
                       int filled, const float *color);


       dtk_create_rectangle_2p()  creates  a  rectangle whose the opposing corners are located at
       (p1_x,p1_y) and  (p2_x,p2_y).

       dtk_create_rectangle_hw() creates a rectangle with height h  and  width  w  and  with  its
       center located at (cx,cy) in the original frame.

       shp,  filled  and  color  have  the  same  usage  and  meaning as for other shape creation

        * shp can be used to modify a previously created shape. If it  is  non-null,  the  handle
          will  be  used  to  modify the shape referenced by shp: no new shape is created and the
          returned value is ensured to be shp in case of success, NULL otherwise. If shp is NULL,
          the function will attempt to create a new shape.

        * filled  is  set  to  0 if the described shape should be a continuous line or a non-null
          value if the shape is supposed to be filled polygon.

        * color should point to a 4 float array containing a normalized  RGBA  value  (i.e.  each
          component is between 0.0 and 1.0).


       In  case  of  success  these  functions return the handle to the newly created or modified
       shape. If the shp argument is non-null, the handle returned is the same value. In case  of
       error, NULL is returned.