/**
* graphene_matrix_to_2d:
* @m: a #graphene_matrix_t
* @xx: (out): return location for the xx member
* @yx: (out): return location for the yx member
* @xy: (out): return location for the xy member
* @yy: (out): return location for the yy member
* @x_0: (out): return location for the x0 member
* @y_0: (out): return location for the y0 member
*
* Converts a #graphene_matrix_t to an affine transformation
* matrix, if the given matrix is compatible.
*
* The returned values have the following layout:
*
* |[
* | xx yx | | a b 0 |
* | xy yy | = | c d 0 |
* | x0 y0 | | tx ty 1 |
* ]|
*
* This function can be used to convert between a #graphene_matrix_t
* and a matrix type from other libraries.
*
* Returns: %true if the matrix is compatible with an affine
* transformation matrix
*
* Since: 1.0
*/
bool
graphene_matrix_to_2d (const graphene_matrix_t *m,
double *xx,
double *yx,
double *xy,
double *yy,
double *x_0,
double *y_0)
{
if (!graphene_simd4x4f_is_2d (&m->value))
return false;
if (xx != NULL)
*xx = graphene_matrix_get_value (m, 0, 0);
if (yx != NULL)
*yx = graphene_matrix_get_value (m, 0, 1);
if (xy != NULL)
*xy = graphene_matrix_get_value (m, 1, 0);
if (yy != NULL)
*yy = graphene_matrix_get_value (m, 1, 1);
if (x_0 != NULL)
*x_0 = graphene_matrix_get_value (m, 3, 0);
if (y_0 != NULL)
*y_0 = graphene_matrix_get_value (m, 3, 1);
return true;
}
gboolean
graphene_matrix_is_2d (const graphene_matrix_t *m)
{
g_return_val_if_fail (m != NULL, FALSE);
return graphene_simd4x4f_is_2d (&m->value);
}
/**
* graphene_matrix_is_2d:
* @m: a #graphene_matrix_t
*
* Checks whether the given #graphene_matrix_t is compatible with an
* a 2D affine transformation matrix.
*
* Returns: %true if the matrix is compatible with an affine
* transformation matrix
*
* Since: 1.0
*/
bool
graphene_matrix_is_2d (const graphene_matrix_t *m)
{
return graphene_simd4x4f_is_2d (&m->value);
}
