XFORM structure

The XFORM structure specifies a world-space to page-space transformation.

Syntax

typedef struct tagXFORM {
  FLOAT eM11;
  FLOAT eM12;
  FLOAT eM21;
  FLOAT eM22;
  FLOAT eDx;
  FLOAT eDy;
} XFORM, *PXFORM, *LPXFORM;

Members

eM11

The following.

Operation Meaning
Scaling Horizontal scaling component
Rotation Cosine of rotation angle
Reflection Horizontal component

eM12

The following.

Operation Meaning
Shear Horizontal proportionality constant
Rotation Sine of the rotation angle

eM21

The following.

Operation Meaning
Shear Vertical proportionality constant
Rotation Negative sine of the rotation angle

eM22

The following.

Operation Meaning
Scaling Vertical scaling component
Rotation Cosine of rotation angle
Reflection Vertical reflection component

eDx

The horizontal translation component, in logical units.

eDy

The vertical translation component, in logical units.

Remarks

The following list describes how the members are used for each operation.

Operation eM11 eM12 eM21 eM22
Rotation Cosine Sine Negative sine Cosine
Scaling Horizontal scaling component Not used Not used Vertical Scaling Component
Shear Not used Horizontal Proportionality Constant Vertical Proportionality Constant Not used
Reflection Horizontal Reflection Component Not used Not used Vertical Reflection Component

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Header wingdi.h (include Windows.h)

See Also

Coordinate Space and Transformation Structures

Coordinate Spaces and Transformations Overview

ExtCreateRegion

GetWorldTransform

ModifyWorldTransform

PlayEnhMetaFile

SetWorldTransform