void
fz_lineto(fz_context *ctx, fz_path *path, float x, float y)
{
float x0, y0;
if (path->last < 0)
{
fz_warn(ctx, "lineto with no current point");
return;
}
if (path->items[path->last].k == FZ_CLOSE_PATH)
{
x0 = path->items[path->last-2].v;
y0 = path->items[path->last-1].v;
}
else
{
x0 = path->items[path->len-2].v;
y0 = path->items[path->len-1].v;
}
/* Anything other than MoveTo followed by LineTo the same place is a nop */
if (path->items[path->last].k != FZ_MOVETO && x0 == x && y0 == y)
return;
grow_path(ctx, path, 3);
path->items[path->len++].k = FZ_LINETO;
path->items[path->len++].v = x;
path->items[path->len++].v = y;
}
void
fz_curveto(fz_context *ctx, fz_path *path,
float x1, float y1,
float x2, float y2,
float x3, float y3)
{
float x0, y0;
if (path->last < 0)
{
fz_warn(ctx, "curveto with no current point");
return;
}
if (path->items[path->last].k == FZ_CLOSE_PATH)
{
x0 = path->items[path->last-2].v;
y0 = path->items[path->last-1].v;
}
else
{
x0 = path->items[path->len-2].v;
y0 = path->items[path->len-1].v;
}
/* Check for degenerate cases: */
if (x0 == x1 && y0 == y1)
{
if (x2 == x3 && y2 == y3)
{
/* If (x1,y1)==(x2,y2) and prev wasn't a moveto, then skip */
if (x1 == x2 && y1 == y2 && path->items[path->last].k != FZ_MOVETO)
return;
/* Otherwise a line will suffice */
fz_lineto(ctx, path, x3, y3);
return;
}
if (x1 == x2 && y1 == y2)
{
/* A line will suffice */
fz_lineto(ctx, path, x3, y3);
return;
}
}
else if (x1 == x2 && y1 == y2 && x2 == x3 && y2 == y3)
{
/* A line will suffice */
fz_lineto(ctx, path, x3, y3);
return;
}
grow_path(ctx, path, 7);
path->items[path->len++].k = FZ_CURVETO;
path->items[path->len++].v = x1;
path->items[path->len++].v = y1;
path->items[path->len++].v = x2;
path->items[path->len++].v = y2;
path->items[path->len++].v = x3;
path->items[path->len++].v = y3;
}
void
fz_moveto(fz_path *path, float x, float y)
{
grow_path(path, 3);
path->items[path->len++].k = FZ_MOVETO;
path->items[path->len++].v = x;
path->items[path->len++].v = y;
}
void
fz_closepath(fz_path *path)
{
if (path->len == 0)
{
fz_warn("closepath with no current point");
return;
}
grow_path(path, 1);
path->items[path->len++].k = FZ_CLOSE_PATH;
}
void
fz_moveto(fz_context *ctx, fz_path *path, float x, float y)
{
if (path->last >= 0 && path->items[path->last].k == FZ_MOVETO)
{
/* No point in having MOVETO then MOVETO */
path->len = path->last;
}
grow_path(ctx, path, 3);
path->items[path->len++].k = FZ_MOVETO;
path->items[path->len++].v = x;
path->items[path->len++].v = y;
}
void
fz_lineto(fz_path *path, float x, float y)
{
if (path->len == 0)
{
fz_warn("lineto with no current point");
return;
}
grow_path(path, 3);
path->items[path->len++].k = FZ_LINETO;
path->items[path->len++].v = x;
path->items[path->len++].v = y;
}
void
fz_closepath(fz_context *ctx, fz_path *path)
{
if (path->last < 0)
{
fz_warn(ctx, "closepath with no current point");
return;
}
/* CLOSE following a CLOSE is a NOP */
if (path->items[path->last].k == FZ_CLOSE_PATH)
return;
grow_path(ctx, path, 1);
path->items[path->len++].k = FZ_CLOSE_PATH;
}
void
fz_curveto(fz_path *path,
float x1, float y1,
float x2, float y2,
float x3, float y3)
{
if (path->len == 0)
{
fz_warn("curveto with no current point");
return;
}
grow_path(path, 7);
path->items[path->len++].k = FZ_CURVETO;
path->items[path->len++].v = x1;
path->items[path->len++].v = y1;
path->items[path->len++].v = x2;
path->items[path->len++].v = y2;
path->items[path->len++].v = x3;
path->items[path->len++].v = y3;
}
