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Add _cairo_matrix_is_translation

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This commit is contained in:
Dan Amelang 2006-11-20 10:42:50 -08:00 • committed by Carl Worth
parent 57fba8d9b6
commit ca79307bdf
2 changed files with 10 additions and 0 deletions
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7
src/cairo-matrix.c
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@ -548,6 +548,13 @@ _cairo_matrix_is_identity (const cairo_matrix_t *matrix)
matrix->x0 == 0.0 && matrix->y0 == 0.0);
}
cairo_bool_t
_cairo_matrix_is_translation (const cairo_matrix_t *matrix)
{
return (matrix->xx == 1.0 && matrix->yx == 0.0 &&
matrix->xy == 0.0 && matrix->yy == 1.0);
}
cairo_bool_t
_cairo_matrix_is_integer_translation(const cairo_matrix_t *m,
int *itx, int *ity)

3
src/cairoint.h
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@ -2197,6 +2197,9 @@ _cairo_matrix_compute_scale_factors (const cairo_matrix_t *matrix,
cairo_private cairo_bool_t
_cairo_matrix_is_identity (const cairo_matrix_t *matrix);
cairo_private cairo_bool_t
_cairo_matrix_is_translation (const cairo_matrix_t *matrix);
cairo_private cairo_bool_t
_cairo_matrix_is_integer_translation(const cairo_matrix_t *matrix,
int *itx, int *ity);