FsScissor

The FsScissor structure represents a rectangular region, potentially transformed, that can be used as a mask.

struct FsScissor {
    float xform[6];
    float extent[2];
    bool use;
    bool set;
    FsClipMode mode;
};

Member	Description
`xform`	Defines the transformation of the pattern using an array of 6 floats: `[ m11, m21, m12, m22, m13, m23 ]`. This is a lightweight version of 3x3 transformation matrix. If you consider the following matrix: `m11 m12 m13` `m21 m22 m23` `m31 m32 m33`
`extent`	Defines the size of the pattern using an array of two floats: `[width, height]`.
`use`	If true, the drawing call will modify the clipping stencil.
`set`	If true, the drawing call will use the current clipping stencil (if false, it will ignore it)
`mode`	The clipmode to use. See the table below for details.

The “mode” member of the struct can take one of the following constants:

Constant	Description
`ClipModeReplace`	Specifies that the existing region is replaced by the new region.
`ClipModeIntersect`	Specifies that the existing region is replaced by the intersection of itself and the new region.
`ClipModeUnion`	Specifies that the existing region is replaced by the union of itself and the new region.
`ClipModeXor`	Specifies that the existing region is replaced by the result of performing an XOR on the two regions. A point is in the XOR of two regions if it is in one region or the other but not in both regions. NOTE: This mode is currently unsupported and should not be used.
`ClipModeExclude`	Specifies that the existing region is replaced by the portion of itself that is outside of the new region.
`ClipModeComplement`	Specifies that the existing region is replaced by the portion of the new region that is outside of the existing region.