#include "xte.h"
#include "builtins.h"
#include "blocktype.h"

static int my_w = -1;
static int my_h;
static int x_sum;
static int x_out;
static char priv_dummy;

static BLOCKDIMS size(void)
{
 XCharStruct cs_in;
 XCharStruct cs_sum;
 XCharStruct cs_out;

 if (my_w < 0)
  { XTextExtents(font,"In",2,XTE_JUNK,&cs_in);
    XTextExtents(font,"Sum",3,XTE_JUNK,&cs_sum);
    XTextExtents(font,"Out",3,XTE_JUNK,&cs_out);
    x_sum = cs_in.width + (2 * font_space);
    x_out = x_sum + cs_sum.width + font_space;
    my_w = cs_in.width + cs_sum.width + cs_out.width + (4 * font_space);
    my_h = 3 * font_baselineskip;
  }
 return((BLOCKDIMS){.w=my_w,.h=my_h});
}

static void setup(void (*cont)(void *, void *), void *arg)
{
 (*cont)(&priv_dummy,arg);
}

static void destroy(void *pv __attribute__((__unused__)))
{
}

static void render(void *pv __attribute__((__unused__)), Drawable d, GC gc_bg, GC gc_fg)
{
 int y;

 XFillRectangle(disp,d,gc_bg,0,0,my_w,my_h);
 XDrawLine(disp,d,gc_fg,0,0,my_w-2,0);
 XDrawLine(disp,d,gc_fg,my_w-1,0,my_w-1,my_h-2);
 XDrawLine(disp,d,gc_fg,my_w-1,my_h-1,1,my_h-1);
 XDrawLine(disp,d,gc_fg,0,my_h-1,0,1);
 y = font_baseline + font_baselineskip;
 XDrawString(disp,d,gc_fg,x_sum,y,"Sum",3);
 XDrawString(disp,d,gc_fg,x_out,y,"Out",3);
 y = font_baseline + (font_baselineskip / 2);
 XDrawString(disp,d,gc_fg,font_space,y,"In",2);
 XDrawString(disp,d,gc_fg,font_space,y+font_baselineskip,"In",2);
}

static const char *ins[] = { "In1", "In2" };

static const char *outs[] = { "Out" };

BLOCKTYPE block_sum
 = { .name = "Sum",
     .n_in = 2,
     .ins = &ins[0],
     .n_out = 1,
     .outs = &outs[0],
     .n_param = 0,
     .params = 0,
     .compute_size = &size,
     .setup = &setup,
     .destroy = &destroy,
     .render = &render };