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simplify pattern extents for translation matrices

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This commit is contained in:
Chris Wilson 2010-04-03 13:36:18 +01:00
parent d45c7dc62d
commit a3cb52e403
1 changed files with 14 additions and 8 deletions
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22
src/cairo-pattern.c
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@ -2445,7 +2445,6 @@ void
_cairo_pattern_get_extents (const cairo_pattern_t *pattern,
cairo_rectangle_int_t *extents)
{
cairo_matrix_t imatrix;
double x1, y1, x2, y2;
cairo_status_t status;
@ -2558,14 +2557,21 @@ _cairo_pattern_get_extents (const cairo_pattern_t *pattern,
ASSERT_NOT_REACHED;
}
imatrix = pattern->matrix;
status = cairo_matrix_invert (&imatrix);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
if (_cairo_matrix_is_translation (&pattern->matrix)) {
x1 -= pattern->matrix.x0; x2 -= pattern->matrix.x0;
y1 -= pattern->matrix.y0; y2 -= pattern->matrix.y0;
} else {
cairo_matrix_t imatrix;
_cairo_matrix_transform_bounding_box (&imatrix,
&x1, &y1, &x2, &y2,
NULL);
imatrix = pattern->matrix;
status = cairo_matrix_invert (&imatrix);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
_cairo_matrix_transform_bounding_box (&imatrix,
&x1, &y1, &x2, &y2,
NULL);
}
x1 = floor (x1);
if (x1 < CAIRO_RECT_INT_MIN)