2 // System.Drawing.Drawing2D.LinearGradientBrush.cs
5 // Dennis Hayes (dennish@Raytek.com)
6 // Ravindra (rkumar@novell.com)
8 // Copyright (C) 2002/3 Ximian, Inc. http://www.ximian.com
9 // Copyright (C) 2004,2006 Novell, Inc (http://www.novell.com)
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.ComponentModel;
33 namespace System.Drawing.Drawing2D {
35 public sealed class LinearGradientBrush : Brush
39 internal LinearGradientBrush (IntPtr native) : base (native)
41 Status status = GDIPlus.GdipGetLineRect (native, out rectangle);
42 GDIPlus.CheckStatus (status);
45 public LinearGradientBrush (Point point1, Point point2, Color color1, Color color2)
47 Status status = GDIPlus.GdipCreateLineBrushI (ref point1, ref point2, color1.ToArgb (), color2.ToArgb (), WrapMode.Tile, out nativeObject);
48 GDIPlus.CheckStatus (status);
51 status = GDIPlus.GdipGetLineRectI (nativeObject, out rect);
52 GDIPlus.CheckStatus (status);
53 rectangle = (RectangleF) rect;
56 public LinearGradientBrush (PointF point1, PointF point2, Color color1, Color color2)
58 Status status = GDIPlus.GdipCreateLineBrush (ref point1, ref point2, color1.ToArgb (), color2.ToArgb (), WrapMode.Tile, out nativeObject);
59 GDIPlus.CheckStatus (status);
61 status = GDIPlus.GdipGetLineRect (nativeObject, out rectangle);
62 GDIPlus.CheckStatus (status);
65 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
67 Status status = GDIPlus.GdipCreateLineBrushFromRectI (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
68 GDIPlus.CheckStatus (status);
70 rectangle = (RectangleF) rect;
73 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
77 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
79 Status status = GDIPlus.GdipCreateLineBrushFromRect (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
80 GDIPlus.CheckStatus (status);
85 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
89 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle, bool isAngleScaleable)
91 Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngleI (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
92 GDIPlus.CheckStatus (status);
94 rectangle = (RectangleF) rect;
97 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle, bool isAngleScaleable)
99 Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngle (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
100 GDIPlus.CheckStatus (status);
110 Status status = GDIPlus.GdipGetLineBlendCount (nativeObject, out count);
111 GDIPlus.CheckStatus (status);
112 float [] factors = new float [count];
113 float [] positions = new float [count];
114 status = GDIPlus.GdipGetLineBlend (nativeObject, factors, positions, count);
115 GDIPlus.CheckStatus (status);
117 Blend blend = new Blend ();
118 blend.Factors = factors;
119 blend.Positions = positions;
125 float [] factors = value.Factors;
126 float [] positions = value.Positions;
127 count = factors.Length;
129 if (count == 0 || positions.Length == 0)
130 throw new ArgumentException ("Invalid Blend object. It should have at least 2 elements in each of the factors and positions arrays.");
132 if (count != positions.Length)
133 throw new ArgumentException ("Invalid Blend object. It should contain the same number of factors and positions values.");
135 if (positions [0] != 0.0F)
136 throw new ArgumentException ("Invalid Blend object. The positions array must have 0.0 as its first element.");
138 if (positions [count - 1] != 1.0F)
139 throw new ArgumentException ("Invalid Blend object. The positions array must have 1.0 as its last element.");
141 Status status = GDIPlus.GdipSetLineBlend (nativeObject, factors, positions, count);
142 GDIPlus.CheckStatus (status);
146 public bool GammaCorrection {
148 bool gammaCorrection;
149 Status status = GDIPlus.GdipGetLineGammaCorrection (nativeObject, out gammaCorrection);
150 GDIPlus.CheckStatus (status);
151 return gammaCorrection;
154 Status status = GDIPlus.GdipSetLineGammaCorrection (nativeObject, value);
155 GDIPlus.CheckStatus (status);
159 public ColorBlend InterpolationColors {
162 Status status = GDIPlus.GdipGetLinePresetBlendCount (nativeObject, out count);
163 GDIPlus.CheckStatus (status);
164 int [] intcolors = new int [count];
165 float [] positions = new float [count];
166 status = GDIPlus.GdipGetLinePresetBlend (nativeObject, intcolors, positions, count);
167 GDIPlus.CheckStatus (status);
169 ColorBlend interpolationColors = new ColorBlend ();
170 Color [] colors = new Color [count];
171 for (int i = 0; i < count; i++)
172 colors [i] = Color.FromArgb (intcolors [i]);
173 interpolationColors.Colors = colors;
174 interpolationColors.Positions = positions;
176 return interpolationColors;
180 Color [] colors = value.Colors;
181 float [] positions = value.Positions;
182 count = colors.Length;
184 if (count == 0 || positions.Length == 0)
185 throw new ArgumentException ("Invalid ColorBlend object. It should have at least 2 elements in each of the colors and positions arrays.");
187 if (count != positions.Length)
188 throw new ArgumentException ("Invalid ColorBlend object. It should contain the same number of positions and color values.");
190 if (positions [0] != 0.0F)
191 throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 0.0 as its first element.");
193 if (positions [count - 1] != 1.0F)
194 throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 1.0 as its last element.");
196 int [] blend = new int [colors.Length];
197 for (int i = 0; i < colors.Length; i++)
198 blend [i] = colors [i].ToArgb ();
200 Status status = GDIPlus.GdipSetLinePresetBlend (nativeObject, blend, positions, count);
201 GDIPlus.CheckStatus (status);
205 public Color [] LinearColors {
207 int [] colors = new int [2];
208 Status status = GDIPlus.GdipGetLineColors (nativeObject, colors);
209 GDIPlus.CheckStatus (status);
210 Color [] linearColors = new Color [2];
211 linearColors [0] = Color.FromArgb (colors [0]);
212 linearColors [1] = Color.FromArgb (colors [1]);
217 Status status = GDIPlus.GdipSetLineColors (nativeObject, value [0].ToArgb (), value [1].ToArgb ());
218 GDIPlus.CheckStatus (status);
222 public RectangleF Rectangle {
228 public Matrix Transform {
230 Matrix matrix = new Matrix ();
231 Status status = GDIPlus.GdipGetLineTransform (nativeObject, matrix.nativeMatrix);
232 GDIPlus.CheckStatus (status);
238 throw new ArgumentNullException ("Transform");
240 Status status = GDIPlus.GdipSetLineTransform (nativeObject, value.nativeMatrix);
241 GDIPlus.CheckStatus (status);
245 public WrapMode WrapMode {
248 Status status = GDIPlus.GdipGetLineWrapMode (nativeObject, out wrapMode);
249 GDIPlus.CheckStatus (status);
254 // note: Clamp isn't valid (context wise) but it is checked in libgdiplus
255 if ((value < WrapMode.Tile) || (value > WrapMode.Clamp))
256 throw new InvalidEnumArgumentException ("WrapMode");
258 Status status = GDIPlus.GdipSetLineWrapMode (nativeObject, value);
259 GDIPlus.CheckStatus (status);
265 public void MultiplyTransform (Matrix matrix)
267 MultiplyTransform (matrix, MatrixOrder.Prepend);
270 public void MultiplyTransform (Matrix matrix, MatrixOrder order)
273 throw new ArgumentNullException ("matrix");
275 Status status = GDIPlus.GdipMultiplyLineTransform (nativeObject, matrix.nativeMatrix, order);
276 GDIPlus.CheckStatus (status);
279 public void ResetTransform ()
281 Status status = GDIPlus.GdipResetLineTransform (nativeObject);
282 GDIPlus.CheckStatus (status);
285 public void RotateTransform (float angle)
287 RotateTransform (angle, MatrixOrder.Prepend);
290 public void RotateTransform (float angle, MatrixOrder order)
292 Status status = GDIPlus.GdipRotateLineTransform (nativeObject, angle, order);
293 GDIPlus.CheckStatus (status);
296 public void ScaleTransform (float sx, float sy)
298 ScaleTransform (sx, sy, MatrixOrder.Prepend);
301 public void ScaleTransform (float sx, float sy, MatrixOrder order)
303 Status status = GDIPlus.GdipScaleLineTransform (nativeObject, sx, sy, order);
304 GDIPlus.CheckStatus (status);
307 public void SetBlendTriangularShape (float focus)
309 SetBlendTriangularShape (focus, 1.0F);
312 public void SetBlendTriangularShape (float focus, float scale)
314 if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
315 throw new ArgumentException ("Invalid parameter passed.");
317 Status status = GDIPlus.GdipSetLineLinearBlend (nativeObject, focus, scale);
318 GDIPlus.CheckStatus (status);
321 public void SetSigmaBellShape (float focus)
323 SetSigmaBellShape (focus, 1.0F);
326 public void SetSigmaBellShape (float focus, float scale)
328 if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
329 throw new ArgumentException ("Invalid parameter passed.");
331 Status status = GDIPlus.GdipSetLineSigmaBlend (nativeObject, focus, scale);
332 GDIPlus.CheckStatus (status);
335 public void TranslateTransform (float dx, float dy)
337 TranslateTransform (dx, dy, MatrixOrder.Prepend);
340 public void TranslateTransform (float dx, float dy, MatrixOrder order)
342 Status status = GDIPlus.GdipTranslateLineTransform (nativeObject, dx, dy, order);
343 GDIPlus.CheckStatus (status);
346 public override object Clone ()
349 Status status = GDIPlus.GdipCloneBrush (nativeObject, out clonePtr);
350 GDIPlus.CheckStatus (status);
352 return new LinearGradientBrush (clonePtr);