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path: Tighten transformed extents

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The transformation code should produce tight extents if they are to be
used in the new simple extents functions.
This commit is contained in:
Andrea Canciani 2010-10-22 23:16:21 +02:00
parent 89e1261dd0
commit b8444a5c78
1 changed files with 15 additions and 0 deletions
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15
src/cairo-path-fixed.c
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@ -1055,6 +1055,7 @@ void
_cairo_path_fixed_transform (cairo_path_fixed_t *path,
const cairo_matrix_t *matrix)
{
cairo_box_t extents;
cairo_point_t point;
cairo_path_buf_t *buf;
unsigned int i;
@ -1076,6 +1077,7 @@ _cairo_path_fixed_transform (cairo_path_fixed_t *path,
if (buf->num_points == 0)
return;
extents = path->extents;
point = buf->points[0];
_cairo_path_fixed_transform_point (&point, matrix);
_cairo_box_set (&path->extents, &point, &point);
@ -1087,6 +1089,19 @@ _cairo_path_fixed_transform (cairo_path_fixed_t *path,
}
} cairo_path_foreach_buf_end (buf, path);
if (path->has_curve_to) {
cairo_bool_t is_tight;
_cairo_matrix_transform_bounding_box_fixed (matrix, &extents, &is_tight);
if (!is_tight) {
cairo_bool_t has_extents;
has_extents = _cairo_path_bounder_extents (path, &extents);
assert (has_extents);
}
path->extents = extents;
}
/* flags might become more strict than needed */
path->stroke_is_rectilinear = FALSE;
path->fill_is_rectilinear = FALSE;