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//
// System.Drawing.Drawing2D.LinearGradientBrush.cs
//
// Authors:
// Dennis Hayes (dennish@Raytek.com)
// Ravindra (rkumar@novell.com)
//
// Copyright (C) 2002/3 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.ComponentModel;
namespace System.Drawing.Drawing2D {
public sealed class LinearGradientBrush : Brush
{
RectangleF rectangle;
internal LinearGradientBrush (IntPtr native) : base (native)
{
Status status = GDIPlus.GdipGetLineRect (native, out rectangle);
GDIPlus.CheckStatus (status);
}
public LinearGradientBrush (Point point1, Point point2, Color color1, Color color2)
{
Status status = GDIPlus.GdipCreateLineBrushI (ref point1, ref point2, color1.ToArgb (), color2.ToArgb (), WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
status = GDIPlus.GdipGetLineRect (nativeObject, out rectangle);
GDIPlus.CheckStatus (status);
}
public LinearGradientBrush (PointF point1, PointF point2, Color color1, Color color2)
{
Status status = GDIPlus.GdipCreateLineBrush (ref point1, ref point2, color1.ToArgb (), color2.ToArgb (), WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
status = GDIPlus.GdipGetLineRect (nativeObject, out rectangle);
GDIPlus.CheckStatus (status);
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
{
Status status = GDIPlus.GdipCreateLineBrushFromRectI (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
rectangle = (RectangleF) rect;
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
{
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
{
Status status = GDIPlus.GdipCreateLineBrushFromRect (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
rectangle = rect;
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
{
}
public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle, bool isAngleScaleable)
{
Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngleI (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
rectangle = (RectangleF) rect;
}
public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle, bool isAngleScaleable)
{
Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngle (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
GDIPlus.CheckStatus (status);
rectangle = rect;
}
// Public Properties
public Blend Blend {
get {
int count;
Status status = GDIPlus.GdipGetLineBlendCount (nativeObject, out count);
GDIPlus.CheckStatus (status);
float [] factors = new float [count];
float [] positions = new float [count];
status = GDIPlus.GdipGetLineBlend (nativeObject, factors, positions, count);
GDIPlus.CheckStatus (status);
Blend blend = new Blend ();
blend.Factors = factors;
blend.Positions = positions;
return blend;
}
set {
// no null check, MS throws a NullReferenceException here
int count;
float [] factors = value.Factors;
float [] positions = value.Positions;
count = factors.Length;
if (count == 0 || positions.Length == 0)
throw new ArgumentException ("Invalid Blend object. It should have at least 2 elements in each of the factors and positions arrays.");
if (count != positions.Length)
throw new ArgumentException ("Invalid Blend object. It should contain the same number of factors and positions values.");
if (positions [0] != 0.0F)
throw new ArgumentException ("Invalid Blend object. The positions array must have 0.0 as its first element.");
if (positions [count - 1] != 1.0F)
throw new ArgumentException ("Invalid Blend object. The positions array must have 1.0 as its last element.");
Status status = GDIPlus.GdipSetLineBlend (nativeObject, factors, positions, count);
GDIPlus.CheckStatus (status);
}
}
[MonoTODO ("The GammaCorrection value is ignored when using libgdiplus.")]
public bool GammaCorrection {
get {
bool gammaCorrection;
Status status = GDIPlus.GdipGetLineGammaCorrection (nativeObject, out gammaCorrection);
GDIPlus.CheckStatus (status);
return gammaCorrection;
}
set {
Status status = GDIPlus.GdipSetLineGammaCorrection (nativeObject, value);
GDIPlus.CheckStatus (status);
}
}
public ColorBlend InterpolationColors {
get {
int count;
Status status = GDIPlus.GdipGetLinePresetBlendCount (nativeObject, out count);
GDIPlus.CheckStatus (status);
int [] intcolors = new int [count];
float [] positions = new float [count];
status = GDIPlus.GdipGetLinePresetBlend (nativeObject, intcolors, positions, count);
GDIPlus.CheckStatus (status);
ColorBlend interpolationColors = new ColorBlend ();
Color [] colors = new Color [count];
for (int i = 0; i < count; i++)
colors [i] = Color.FromArgb (intcolors [i]);
interpolationColors.Colors = colors;
interpolationColors.Positions = positions;
return interpolationColors;
}
set {
if (value == null)
throw new ArgumentException ("InterpolationColors is null");
int count;
Color [] colors = value.Colors;
float [] positions = value.Positions;
count = colors.Length;
if (count == 0 || positions.Length == 0)
throw new ArgumentException ("Invalid ColorBlend object. It should have at least 2 elements in each of the colors and positions arrays.");
if (count != positions.Length)
throw new ArgumentException ("Invalid ColorBlend object. It should contain the same number of positions and color values.");
if (positions [0] != 0.0F)
throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 0.0 as its first element.");
if (positions [count - 1] != 1.0F)
throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 1.0 as its last element.");
int [] blend = new int [colors.Length];
for (int i = 0; i < colors.Length; i++)
blend [i] = colors [i].ToArgb ();
Status status = GDIPlus.GdipSetLinePresetBlend (nativeObject, blend, positions, count);
GDIPlus.CheckStatus (status);
}
}
public Color [] LinearColors {
get {
int [] colors = new int [2];
Status status = GDIPlus.GdipGetLineColors (nativeObject, colors);
GDIPlus.CheckStatus (status);
Color [] linearColors = new Color [2];
linearColors [0] = Color.FromArgb (colors [0]);
linearColors [1] = Color.FromArgb (colors [1]);
return linearColors;
}
set {
// no null check, MS throws a NullReferenceException here
Status status = GDIPlus.GdipSetLineColors (nativeObject, value [0].ToArgb (), value [1].ToArgb ());
GDIPlus.CheckStatus (status);
}
}
public RectangleF Rectangle {
get {
return rectangle;
}
}
public Matrix Transform {
get {
Matrix matrix = new Matrix ();
Status status = GDIPlus.GdipGetLineTransform (nativeObject, matrix.nativeMatrix);
GDIPlus.CheckStatus (status);
return matrix;
}
set {
if (value == null)
throw new ArgumentNullException ("Transform");
Status status = GDIPlus.GdipSetLineTransform (nativeObject, value.nativeMatrix);
GDIPlus.CheckStatus (status);
}
}
public WrapMode WrapMode {
get {
WrapMode wrapMode;
Status status = GDIPlus.GdipGetLineWrapMode (nativeObject, out wrapMode);
GDIPlus.CheckStatus (status);
return wrapMode;
}
set {
// note: Clamp isn't valid (context wise) but it is checked in libgdiplus
if ((value < WrapMode.Tile) || (value > WrapMode.Clamp))
throw new InvalidEnumArgumentException ("WrapMode");
Status status = GDIPlus.GdipSetLineWrapMode (nativeObject, value);
GDIPlus.CheckStatus (status);
}
}
// Public Methods
public void MultiplyTransform (Matrix matrix)
{
MultiplyTransform (matrix, MatrixOrder.Prepend);
}
public void MultiplyTransform (Matrix matrix, MatrixOrder order)
{
if (matrix == null)
throw new ArgumentNullException ("matrix");
Status status = GDIPlus.GdipMultiplyLineTransform (nativeObject, matrix.nativeMatrix, order);
GDIPlus.CheckStatus (status);
}
public void ResetTransform ()
{
Status status = GDIPlus.GdipResetLineTransform (nativeObject);
GDIPlus.CheckStatus (status);
}
public void RotateTransform (float angle)
{
RotateTransform (angle, MatrixOrder.Prepend);
}
public void RotateTransform (float angle, MatrixOrder order)
{
Status status = GDIPlus.GdipRotateLineTransform (nativeObject, angle, order);
GDIPlus.CheckStatus (status);
}
public void ScaleTransform (float sx, float sy)
{
ScaleTransform (sx, sy, MatrixOrder.Prepend);
}
public void ScaleTransform (float sx, float sy, MatrixOrder order)
{
Status status = GDIPlus.GdipScaleLineTransform (nativeObject, sx, sy, order);
GDIPlus.CheckStatus (status);
}
public void SetBlendTriangularShape (float focus)
{
SetBlendTriangularShape (focus, 1.0F);
}
public void SetBlendTriangularShape (float focus, float scale)
{
if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
throw new ArgumentException ("Invalid parameter passed.");
Status status = GDIPlus.GdipSetLineLinearBlend (nativeObject, focus, scale);
GDIPlus.CheckStatus (status);
}
public void SetSigmaBellShape (float focus)
{
SetSigmaBellShape (focus, 1.0F);
}
public void SetSigmaBellShape (float focus, float scale)
{
if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
throw new ArgumentException ("Invalid parameter passed.");
Status status = GDIPlus.GdipSetLineSigmaBlend (nativeObject, focus, scale);
GDIPlus.CheckStatus (status);
}
public void TranslateTransform (float dx, float dy)
{
TranslateTransform (dx, dy, MatrixOrder.Prepend);
}
public void TranslateTransform (float dx, float dy, MatrixOrder order)
{
Status status = GDIPlus.GdipTranslateLineTransform (nativeObject, dx, dy, order);
GDIPlus.CheckStatus (status);
}
public override object Clone ()
{
IntPtr clonePtr;
Status status = GDIPlus.GdipCloneBrush (nativeObject, out clonePtr);
GDIPlus.CheckStatus (status);
return new LinearGradientBrush (clonePtr);
}
}
}
|