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);
50 status = GDIPlus.GdipGetLineRect (nativeObject, out rectangle);
51 GDIPlus.CheckStatus (status);
54 public LinearGradientBrush (PointF point1, PointF point2, Color color1, Color color2)
56 Status status = GDIPlus.GdipCreateLineBrush (ref point1, ref point2, color1.ToArgb (), color2.ToArgb (), WrapMode.Tile, out nativeObject);
57 GDIPlus.CheckStatus (status);
59 status = GDIPlus.GdipGetLineRect (nativeObject, out rectangle);
60 GDIPlus.CheckStatus (status);
63 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
65 Status status = GDIPlus.GdipCreateLineBrushFromRectI (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
66 GDIPlus.CheckStatus (status);
68 rectangle = (RectangleF) rect;
71 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
75 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, LinearGradientMode linearGradientMode)
77 Status status = GDIPlus.GdipCreateLineBrushFromRect (ref rect, color1.ToArgb (), color2.ToArgb (), linearGradientMode, WrapMode.Tile, out nativeObject);
78 GDIPlus.CheckStatus (status);
83 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle) : this (rect, color1, color2, angle, false)
87 public LinearGradientBrush (Rectangle rect, Color color1, Color color2, float angle, bool isAngleScaleable)
89 Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngleI (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
90 GDIPlus.CheckStatus (status);
92 rectangle = (RectangleF) rect;
95 public LinearGradientBrush (RectangleF rect, Color color1, Color color2, float angle, bool isAngleScaleable)
97 Status status = GDIPlus.GdipCreateLineBrushFromRectWithAngle (ref rect, color1.ToArgb (), color2.ToArgb (), angle, isAngleScaleable, WrapMode.Tile, out nativeObject);
98 GDIPlus.CheckStatus (status);
108 Status status = GDIPlus.GdipGetLineBlendCount (nativeObject, out count);
109 GDIPlus.CheckStatus (status);
110 float [] factors = new float [count];
111 float [] positions = new float [count];
112 status = GDIPlus.GdipGetLineBlend (nativeObject, factors, positions, count);
113 GDIPlus.CheckStatus (status);
115 Blend blend = new Blend ();
116 blend.Factors = factors;
117 blend.Positions = positions;
122 // no null check, MS throws a NullReferenceException here
124 float [] factors = value.Factors;
125 float [] positions = value.Positions;
126 count = factors.Length;
128 if (count == 0 || positions.Length == 0)
129 throw new ArgumentException ("Invalid Blend object. It should have at least 2 elements in each of the factors and positions arrays.");
131 if (count != positions.Length)
132 throw new ArgumentException ("Invalid Blend object. It should contain the same number of factors and positions values.");
134 if (positions [0] != 0.0F)
135 throw new ArgumentException ("Invalid Blend object. The positions array must have 0.0 as its first element.");
137 if (positions [count - 1] != 1.0F)
138 throw new ArgumentException ("Invalid Blend object. The positions array must have 1.0 as its last element.");
140 Status status = GDIPlus.GdipSetLineBlend (nativeObject, factors, positions, count);
141 GDIPlus.CheckStatus (status);
145 [MonoTODO ("The GammaCorrection value is ignored when using libgdiplus.")]
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 throw new ArgumentException ("InterpolationColors is null");
182 Color [] colors = value.Colors;
183 float [] positions = value.Positions;
184 count = colors.Length;
186 if (count == 0 || positions.Length == 0)
187 throw new ArgumentException ("Invalid ColorBlend object. It should have at least 2 elements in each of the colors and positions arrays.");
189 if (count != positions.Length)
190 throw new ArgumentException ("Invalid ColorBlend object. It should contain the same number of positions and color values.");
192 if (positions [0] != 0.0F)
193 throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 0.0 as its first element.");
195 if (positions [count - 1] != 1.0F)
196 throw new ArgumentException ("Invalid ColorBlend object. The positions array must have 1.0 as its last element.");
198 int [] blend = new int [colors.Length];
199 for (int i = 0; i < colors.Length; i++)
200 blend [i] = colors [i].ToArgb ();
202 Status status = GDIPlus.GdipSetLinePresetBlend (nativeObject, blend, positions, count);
203 GDIPlus.CheckStatus (status);
207 public Color [] LinearColors {
209 int [] colors = new int [2];
210 Status status = GDIPlus.GdipGetLineColors (nativeObject, colors);
211 GDIPlus.CheckStatus (status);
212 Color [] linearColors = new Color [2];
213 linearColors [0] = Color.FromArgb (colors [0]);
214 linearColors [1] = Color.FromArgb (colors [1]);
219 // no null check, MS throws a NullReferenceException here
220 Status status = GDIPlus.GdipSetLineColors (nativeObject, value [0].ToArgb (), value [1].ToArgb ());
221 GDIPlus.CheckStatus (status);
225 public RectangleF Rectangle {
231 public Matrix Transform {
233 Matrix matrix = new Matrix ();
234 Status status = GDIPlus.GdipGetLineTransform (nativeObject, matrix.nativeMatrix);
235 GDIPlus.CheckStatus (status);
241 throw new ArgumentNullException ("Transform");
243 Status status = GDIPlus.GdipSetLineTransform (nativeObject, value.nativeMatrix);
244 GDIPlus.CheckStatus (status);
248 public WrapMode WrapMode {
251 Status status = GDIPlus.GdipGetLineWrapMode (nativeObject, out wrapMode);
252 GDIPlus.CheckStatus (status);
257 // note: Clamp isn't valid (context wise) but it is checked in libgdiplus
258 if ((value < WrapMode.Tile) || (value > WrapMode.Clamp))
259 throw new InvalidEnumArgumentException ("WrapMode");
261 Status status = GDIPlus.GdipSetLineWrapMode (nativeObject, value);
262 GDIPlus.CheckStatus (status);
268 public void MultiplyTransform (Matrix matrix)
270 MultiplyTransform (matrix, MatrixOrder.Prepend);
273 public void MultiplyTransform (Matrix matrix, MatrixOrder order)
276 throw new ArgumentNullException ("matrix");
278 Status status = GDIPlus.GdipMultiplyLineTransform (nativeObject, matrix.nativeMatrix, order);
279 GDIPlus.CheckStatus (status);
282 public void ResetTransform ()
284 Status status = GDIPlus.GdipResetLineTransform (nativeObject);
285 GDIPlus.CheckStatus (status);
288 public void RotateTransform (float angle)
290 RotateTransform (angle, MatrixOrder.Prepend);
293 public void RotateTransform (float angle, MatrixOrder order)
295 Status status = GDIPlus.GdipRotateLineTransform (nativeObject, angle, order);
296 GDIPlus.CheckStatus (status);
299 public void ScaleTransform (float sx, float sy)
301 ScaleTransform (sx, sy, MatrixOrder.Prepend);
304 public void ScaleTransform (float sx, float sy, MatrixOrder order)
306 Status status = GDIPlus.GdipScaleLineTransform (nativeObject, sx, sy, order);
307 GDIPlus.CheckStatus (status);
310 public void SetBlendTriangularShape (float focus)
312 SetBlendTriangularShape (focus, 1.0F);
315 public void SetBlendTriangularShape (float focus, float scale)
317 if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
318 throw new ArgumentException ("Invalid parameter passed.");
320 Status status = GDIPlus.GdipSetLineLinearBlend (nativeObject, focus, scale);
321 GDIPlus.CheckStatus (status);
324 public void SetSigmaBellShape (float focus)
326 SetSigmaBellShape (focus, 1.0F);
329 public void SetSigmaBellShape (float focus, float scale)
331 if (focus < 0 || focus > 1 || scale < 0 || scale > 1)
332 throw new ArgumentException ("Invalid parameter passed.");
334 Status status = GDIPlus.GdipSetLineSigmaBlend (nativeObject, focus, scale);
335 GDIPlus.CheckStatus (status);
338 public void TranslateTransform (float dx, float dy)
340 TranslateTransform (dx, dy, MatrixOrder.Prepend);
343 public void TranslateTransform (float dx, float dy, MatrixOrder order)
345 Status status = GDIPlus.GdipTranslateLineTransform (nativeObject, dx, dy, order);
346 GDIPlus.CheckStatus (status);
349 public override object Clone ()
352 Status status = GDIPlus.GdipCloneBrush (nativeObject, out clonePtr);
353 GDIPlus.CheckStatus (status);
355 return new LinearGradientBrush (clonePtr);