//
// System.Drawing.Drawing2D.Matrix.cs
//
// Authors:
// Stefan Maierhofer <sm@cg.tuwien.ac.at>
// Dennis Hayes (dennish@Raytek.com)
// Duncan Mak (duncan@ximian.com)
// Ravindra (rkumar@novell.com)
//
// (C) Ximian, Inc. http://www.ximian.com
// Copyright (C) 2004, 2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Runtime.InteropServices;
namespace System.Drawing.Drawing2D{
public sealed class Matrix : MarshalByRefObject, IDisposable
{
internal IntPtr nativeMatrix;
// constructors
internal Matrix (IntPtr ptr)
{
nativeMatrix = ptr;
}
public Matrix ()
{
Status status = GDIPlus.GdipCreateMatrix (out nativeMatrix);
GDIPlus.CheckStatus (status);
}
public Matrix (Rectangle rect, Point[] plgpts)
{
if (plgpts == null)
throw new ArgumentNullException ("plgpts");
if (plgpts.Length != 3)
throw new ArgumentException ("plgpts");
Status status = GDIPlus.GdipCreateMatrix3I (ref rect, plgpts, out nativeMatrix);
GDIPlus.CheckStatus (status);
}
public Matrix (RectangleF rect, PointF[] plgpts)
{
if (plgpts == null)
throw new ArgumentNullException ("plgpts");
if (plgpts.Length != 3)
throw new ArgumentException ("plgpts");
Status status = GDIPlus.GdipCreateMatrix3 (ref rect, plgpts, out nativeMatrix);
GDIPlus.CheckStatus (status);
}
public Matrix (float m11, float m12, float m21, float m22, float dx, float dy)
{
Status status = GDIPlus.GdipCreateMatrix2 (m11, m12, m21, m22, dx, dy, out nativeMatrix);
GDIPlus.CheckStatus (status);
}
// properties
public float[] Elements {
get {
float [] retval = new float [6];
IntPtr tmp = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (float)) * 6);
try {
Status status = GDIPlus.GdipGetMatrixElements (nativeMatrix, tmp);
GDIPlus.CheckStatus (status);
Marshal.Copy (tmp, retval, 0, 6);
}
finally {
Marshal.FreeHGlobal (tmp);
}
return retval;
}
}
public bool IsIdentity {
get {
bool retval;
Status status = GDIPlus.GdipIsMatrixIdentity (nativeMatrix, out retval);
GDIPlus.CheckStatus (status);
return retval;
}
}
public bool IsInvertible {
get {
bool retval;
Status status = GDIPlus.GdipIsMatrixInvertible (nativeMatrix, out retval);
GDIPlus.CheckStatus (status);
return retval;
}
}
public float OffsetX {
get {
return this.Elements [4];
}
}
public float OffsetY {
get {
return this.Elements [5];
}
}
public Matrix Clone()
{
IntPtr retval;
Status status = GDIPlus.GdipCloneMatrix (nativeMatrix, out retval);
GDIPlus.CheckStatus (status);
return new Matrix (retval);
}
public void Dispose ()
{
if (nativeMatrix != IntPtr.Zero) {
Status status = GDIPlus.GdipDeleteMatrix (nativeMatrix);
GDIPlus.CheckStatus (status);
nativeMatrix = IntPtr.Zero;
}
GC.SuppressFinalize (this);
}
public override bool Equals (object obj)
{
Matrix m = obj as Matrix;
if (m != null) {
bool retval;
Status status = GDIPlus.GdipIsMatrixEqual (nativeMatrix, m.nativeMatrix, out retval);
GDIPlus.CheckStatus (status);
return retval;
} else
return false;
}
~Matrix()
{
Dispose ();
}
public override int GetHashCode ()
{
return base.GetHashCode ();
}
public void Invert ()
{
Status status = GDIPlus.GdipInvertMatrix (nativeMatrix);
GDIPlus.CheckStatus (status);
}
public void Multiply (Matrix matrix)
{
Multiply (matrix, MatrixOrder.Prepend);
}
public void Multiply (Matrix matrix, MatrixOrder order)
{
if (matrix == null)
throw new ArgumentNullException ("matrix");
Status status = GDIPlus.GdipMultiplyMatrix (nativeMatrix, matrix.nativeMatrix, order);
GDIPlus.CheckStatus (status);
}
public void Reset()
{
Status status = GDIPlus.GdipSetMatrixElements (nativeMatrix, 1, 0, 0, 1, 0, 0);
GDIPlus.CheckStatus (status);
}
public void Rotate (float angle)
{
Rotate (angle, MatrixOrder.Prepend);
}
public void Rotate (float angle, MatrixOrder order)
{
Status status = GDIPlus.GdipRotateMatrix (nativeMatrix, angle, order);
GDIPlus.CheckStatus (status);
}
public void RotateAt (float angle, PointF point)
{
RotateAt (angle, point, MatrixOrder.Prepend);
}
public void RotateAt (float angle, PointF point, MatrixOrder order)
{
if ((order < MatrixOrder.Prepend) || (order > MatrixOrder.Append))
throw new ArgumentException ("order");
angle *= (float) (Math.PI / 180.0); // degrees to radians
float cos = (float) Math.Cos (angle);
float sin = (float) Math.Sin (angle);
float e4 = -point.X * cos + point.Y * sin + point.X;
float e5 = -point.X * sin - point.Y * cos + point.Y;
float[] m = this.Elements;
Status status;
if (order == MatrixOrder.Prepend)
status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
cos * m[0] + sin * m[2],
cos * m[1] + sin * m[3],
-sin * m[0] + cos * m[2],
-sin * m[1] + cos * m[3],
e4 * m[0] + e5 * m[2] + m[4],
e4 * m[1] + e5 * m[3] + m[5]);
else
status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
m[0] * cos + m[1] * -sin,
m[0] * sin + m[1] * cos,
m[2] * cos + m[3] * -sin,
m[2] * sin + m[3] * cos,
m[4] * cos + m[5] * -sin + e4,
m[4] * sin + m[5] * cos + e5);
GDIPlus.CheckStatus (status);
}
public void Scale (float scaleX, float scaleY)
{
Scale (scaleX, scaleY, MatrixOrder.Prepend);
}
public void Scale (float scaleX, float scaleY, MatrixOrder order)
{
Status status = GDIPlus.GdipScaleMatrix (nativeMatrix, scaleX, scaleY, order);
GDIPlus.CheckStatus (status);
}
public void Shear (float shearX, float shearY)
{
Shear (shearX, shearY, MatrixOrder.Prepend);
}
public void Shear (float shearX, float shearY, MatrixOrder order)
{
Status status = GDIPlus.GdipShearMatrix (nativeMatrix, shearX, shearY, order);
GDIPlus.CheckStatus (status);
}
public void TransformPoints (Point[] pts)
{
if (pts == null)
throw new ArgumentNullException ("pts");
Status status = GDIPlus.GdipTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
GDIPlus.CheckStatus (status);
}
public void TransformPoints (PointF[] pts)
{
if (pts == null)
throw new ArgumentNullException ("pts");
Status status = GDIPlus.GdipTransformMatrixPoints (nativeMatrix, pts, pts.Length);
GDIPlus.CheckStatus (status);
}
public void TransformVectors (Point[] pts)
{
if (pts == null)
throw new ArgumentNullException ("pts");
Status status = GDIPlus.GdipVectorTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
GDIPlus.CheckStatus (status);
}
public void TransformVectors (PointF[] pts)
{
if (pts == null)
throw new ArgumentNullException ("pts");
Status status = GDIPlus.GdipVectorTransformMatrixPoints (nativeMatrix, pts, pts.Length);
GDIPlus.CheckStatus (status);
}
public void Translate (float offsetX, float offsetY)
{
Translate (offsetX, offsetY, MatrixOrder.Prepend);
}
public void Translate (float offsetX, float offsetY, MatrixOrder order)
{
Status status = GDIPlus.GdipTranslateMatrix (nativeMatrix, offsetX, offsetY, order);
GDIPlus.CheckStatus (status);
}
public void VectorTransformPoints (Point[] pts)
{
TransformVectors (pts);
}
internal IntPtr NativeObject
{
get{
return nativeMatrix;
}
set {
nativeMatrix = value;
}
}
}
}
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