3x3 Matrices in fixed point

Definition and operations for 3x3 fixed point matrices. More...

Data Structures
struct	_Eina_Matrix3_F16p16
struct	Eina_Matrix3_F16p16
	A 3x3 fixed point (Q16.16) matrix. More...

Typedefs
typedef struct _Eina_Matrix3_F16p16	Eina_Matrix3_F16p16
	A 3x3 fixed point (Q16.16) matrix.

Functions
EINA_API void	eina_matrix3_f16p16_identity (Eina_Matrix3_F16p16 *m)
	Sets the given fixed point matrix to the identity matrix. More...
EINA_API void	eina_matrix3_f16p16_compose (const Eina_Matrix3_F16p16 *m1, const Eina_Matrix3_F16p16 *m2, Eina_Matrix3_F16p16 *dst)
	Sets dst as the matrix multiplication (composition) of two Eina_F16p16 matrices. More...
EINA_API Eina_Matrix_Type	eina_matrix3_f16p16_type_get (const Eina_Matrix3_F16p16 *m)
	Returns the type of the given fixed point matrix. More...

Detailed Description

Definition and operations for 3x3 fixed point matrices.

Function Documentation

eina_matrix3_f16p16_identity()

EINA_API void eina_matrix3_f16p16_identity

(

Eina_Matrix3_F16p16 *

m

)

Sets the given fixed point matrix to the identity matrix.

Parameters

[in]

m

The fixed point matrix to set.

This function sets m to the identity matrix. No check is done on m.

Since

1.14

eina_matrix3_f16p16_compose()

EINA_API void eina_matrix3_f16p16_compose	(	const Eina_Matrix3_F16p16 *	m1,
		const Eina_Matrix3_F16p16 *	m2,
		Eina_Matrix3_F16p16 *	dst
	)

Sets dst as the matrix multiplication (composition) of two Eina_F16p16 matrices.

Parameters

[in]	m1	The first matrix. Must be non-NULL.
[in]	m2	The second matrix. Must be non-NULL.
[out]	dst	The results matrix.

In matrix multiplication, AB, the resultant matrix is created from the rows of A multiplied against the columns of B and summed. This is not a commutative; i.e. AB != BA, so the ordering of arguments m1 and m2 matters.

Since

1.14

References eina_f16p16_mul().

eina_matrix3_f16p16_type_get()

EINA_API Eina_Matrix_Type eina_matrix3_f16p16_type_get

(

const Eina_Matrix3_F16p16 *

m

)

Returns the type of the given fixed point matrix.

Parameters

[in]

m

The fixed point matrix.

Returns

The type of the matrix.

This function returns the type of the matrix m. No check is done on m.

Since

1.14

References EINA_MATRIX_TYPE_AFFINE, EINA_MATRIX_TYPE_IDENTITY, and EINA_MATRIX_TYPE_PROJECTIVE.