The XFORM structure has the following form:
typedef struct tagXFORM { /* xfrm */
FLOAT eM11;
FLOAT eM12;
FLOAT eM21;
FLOAT eM22;
FLOAT eDx;
FLOAT eDy;
} XFORM;
Comments
The XFORM structure specifies a world-space to page-space transformation. The eDx and eDy members specify the horizontal and vertical translation components, respectively. The following table shows how the other members are used, depending on the operation:
| Operation | eM11 | eM12 | eM21 | eM22 |
| Rotation | Cosine of rotation angle | Sine of rotation angle | Negative sine of rotation angle | Cosine of rotation angle |
| Scaling | Horizontal scaling component | Nothing | Nothing | Vertical scaling component |
| Shear | Nothing | Horizontal proportionality constant | Vertical proportionality constant | Nothing |
| Reflection | Horizontal reflection component | Nothing | Nothing | Vertical reflection component |
See Also CRgn::CreateFromData