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[path] Eliminate redundant line-to before a close

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As the close implicitly issues a line-to to the initial point, remove an
identical line-to if present.
This commit is contained in:
Chris Wilson 2009-08-11 17:02:41 +01:00
parent 111f2be71b
commit 4032438625
1 changed files with 22 additions and 0 deletions
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22
src/cairo-path-fixed.c
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@ -574,6 +574,28 @@ _cairo_path_fixed_close_path (cairo_path_fixed_t *path)
if (! path->has_current_point)
return CAIRO_STATUS_SUCCESS;
/* If the previous op was also a LINE_TO back to the start, discard it */
if (_cairo_path_last_op (path) == CAIRO_PATH_OP_LINE_TO) {
if (path->current_point.x == path->last_move_point.x &&
path->current_point.y == path->last_move_point.y)
{
cairo_path_buf_t *buf;
cairo_point_t *p;
buf = cairo_path_tail (path);
if (likely (buf->num_points >= 2)) {
p = &buf->points[buf->num_points-2];
} else {
cairo_path_buf_t *prev_buf = cairo_path_buf_prev (buf);
p = &prev_buf->points[prev_buf->num_points - (2 - buf->num_points)];
}
path->current_point = *p;
buf->num_ops--;
buf->num_points--;
}
}
status = _cairo_path_fixed_add (path, CAIRO_PATH_OP_CLOSE_PATH, NULL, 0);
if (unlikely (status))
return status;