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gstate: Check for an invalid matrix before cairo_transform()

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Similar to the other checks that will generate an invalid matrix prior
to performing the operation.
This commit is contained in:
Chris Wilson 2010-01-22 14:33:53 +00:00
parent 22316a0c17
commit c2ef45226d
1 changed files with 3 additions and 0 deletions
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3
src/cairo-gstate.c
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@ -677,6 +677,9 @@ _cairo_gstate_transform (cairo_gstate_t *gstate,
cairo_matrix_t tmp; cairo_matrix_t tmp;
cairo_status_t status; cairo_status_t status;
if (! _cairo_matrix_is_invertible (matrix))
return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
if (_cairo_matrix_is_identity (matrix)) if (_cairo_matrix_is_identity (matrix))
return CAIRO_STATUS_SUCCESS; return CAIRO_STATUS_SUCCESS;