GraphicsMatrix

A GraphicsMatrix is a native representation of an affine matrix.

The contents are specific and private to the respective renderer. Instances are ref counted and can therefore be assigned as usual. The only way to get a valid instance is via GraphicsContext.CreateMatrix or GraphicsRenderer.CreateMatrix .

Inheritance Diagram

Inheritance diagram for class GraphicsMatrix

Methods Summary

Concat	Concatenates the matrix passed with the current matrix.
Get	Returns the component values of the matrix via the argument pointers.
GetNativeMatrix	Returns the native representation of the matrix.
Invert	Inverts the matrix.
IsEqual	Returns True if the elements of the transformation matrix are equal.
IsIdentity	Return True if this is the identity matrix.
Rotate	Rotates this matrix clockwise (in radians).
Scale	Scales this matrix.
Set	Sets the matrix to the respective values (default values are the identity matrix).
TransformDistance	Applies this matrix to a distance (ie.
TransformPoint	Applies this matrix to a point.
Translate	Translates this matrix.

Properties Summary

NativeMatrix

See GetNativeMatrix

Class API

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class GraphicsMatrix(GraphicsObject)

A GraphicsMatrix is a native representation of an affine matrix.

Methods

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Concat(self, t)

Concatenates the matrix passed with the current matrix.

Parameters:t (GraphicsMatrix) –

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Get(self)

Returns the component values of the matrix via the argument pointers.

Return type:tuple Returns:( a, b, c, d, tx, ty )

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GetNativeMatrix(self)

Returns the native representation of the matrix.

For CoreGraphics this is a CFAffineMatrix pointer, for GDIPlus a Matrix Pointer, and for Cairo a cairo_matrix_t pointer.

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Invert(self)

Inverts the matrix.

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IsEqual(self, t)

Returns True if the elements of the transformation matrix are equal.

Parameters:t (GraphicsMatrix) – Return type:bool

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IsIdentity(self)

Return True if this is the identity matrix.

Return type:bool

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Rotate(self, angle)

Rotates this matrix clockwise (in radians).

Parameters:angle (float) –

Rotation angle in radians, clockwise.

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Scale(self, xScale, yScale)

Scales this matrix.

Parameters:

• xScale (float) –
• yScale (float) –

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Set(self, a=1.0, b=0.0, c=0.0, d=1.0, tx=0.0, ty=0.0)

Sets the matrix to the respective values (default values are the identity matrix).

Parameters:

• a (float) –
• b (float) –
• c (float) –
• d (float) –
• tx (float) –
• ty (float) –

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TransformDistance(self, dx, dy)

Applies this matrix to a distance (ie.

performs all transforms except translations).

Parameters:

• dx (float) –
• dy (float) –

Return type:

tuple

Returns:

( dx, dy )

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TransformPoint(self, x, y)

Applies this matrix to a point.

Parameters:

• x (float) –
• y (float) –

Return type:

tuple

Returns:

( x, y )

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Translate(self, dx, dy)

Translates this matrix.

Parameters:

• dx (float) –
• dy (float) –

Properties

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NativeMatrix

See GetNativeMatrix