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compositor: handle non-invertible surface transformations

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Detect a non-invertible surface total transformation, disable it, and
warn about it.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This commit is contained in:
Pekka Paalanen
2012-01-23 10:02:47 +02:00
parent 460099f143
commit 7ae02130bd
1 changed files with 6 additions and 1 deletions
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src/compositor.c
+6 -1
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@@ -250,7 +250,12 @@ weston_surface_update_transform(struct weston_surface *surface)
wl_list_for_each(tform, &surface->transform.list, link) wl_list_for_each(tform, &surface->transform.list, link)
weston_matrix_multiply(matrix, &tform->matrix); weston_matrix_multiply(matrix, &tform->matrix);
weston_matrix_invert(inverse, matrix); if (weston_matrix_invert(inverse, matrix) < 0) {
/* Oops, bad total transformation, not invertible */
surface->transform.enabled = 0;
fprintf(stderr, "error: weston_surface %p"
" transformation not invertible.\n", surface);
}
} }
WL_EXPORT void WL_EXPORT void