mirror of
https://github.com/classilla/tenfourfox.git
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21 lines
826 B
Diff
21 lines
826 B
Diff
diff --git a/gfx/cairo/cairo/src/cairo-gstate.c b/gfx/cairo/cairo/src/cairo-gstate.c
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index 0439bcf..32a5c4b 100644
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--- a/gfx/cairo/cairo/src/cairo-gstate.c
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+++ b/gfx/cairo/cairo/src/cairo-gstate.c
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@@ -1271,8 +1271,13 @@ _cairo_gstate_set_font_matrix (cairo_gstate_t *gstate,
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if (memcmp (matrix, &gstate->font_matrix, sizeof (cairo_matrix_t)) == 0)
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return CAIRO_STATUS_SUCCESS;
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- if (! _cairo_matrix_is_invertible (matrix))
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- return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
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+ if (! _cairo_matrix_is_invertible (matrix)) {
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+ /* rank 0 matrices are ok even though they are not invertible */
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+ if (!(matrix->xx == 0. && matrix->xy == 0. &&
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+ matrix->yx == 0. && matrix->yy == 0.)) {
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+ return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
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+ }
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+ }
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_cairo_gstate_unset_scaled_font (gstate);
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