Mercurial > silverbladetech

comparison Chronosv2/source/Extensions/BitmapExtensions.cs @ 10:443821e55f06

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial cleaned up add from Codeplex files
author stevenh7776 stevenhollidge@hotmail.com
date Tue, 21 Feb 2012 17:25:44 +0700
parents
children
comparison
equal deleted inserted replaced
9:904a9faadf8b 10:443821e55f06
1 using System;
2 using System.Drawing;
3 using System.Drawing.Drawing2D;
4
5 namespace Chronos.Extensions
6 {
7 /// <summary>
8 /// Extension methods for the System.Drawing.Bitmap class
9 /// </summary>
10 public static class BitmapExtensions
11 {
12 #region · Extensions ·
13
14 /// <summary>
15 /// Scales the bitmap to the passed target size without respecting the aspect.
16 /// </summary>
17 /// <param name="bitmap">The source bitmap.</param>
18 /// <param name="size">The target size.</param>
19 /// <returns>The scaled bitmap</returns>
20 /// <example><code>
21 /// var bitmap = new Bitmap("image.png");
22 /// var thumbnail = bitmap.ScaleToSize(100, 100);
23 /// </code></example>
24 public static Bitmap ScaleToSize(this Bitmap bitmap, Size size)
25 {
26 return bitmap.ScaleToSize(size.Width, size.Height);
27 }
28
29 /// <summary>
30 /// Scales the bitmap to the passed target size without respecting the aspect.
31 /// </summary>
32 /// <param name="bitmap">The source bitmap.</param>
33 /// <param name="width">The target width.</param>
34 /// <param name="height">The target height.</param>
35 /// <returns>The scaled bitmap</returns>
36 /// <example><code>
37 /// var bitmap = new Bitmap("image.png");
38 /// var thumbnail = bitmap.ScaleToSize(100, 100);
39 /// </code></example>
40 public static Bitmap ScaleToSize(this Bitmap bitmap, int width, int height)
41 {
42 var scaledBitmap = new Bitmap(width, height);
43
44 using (var g = Graphics.FromImage(scaledBitmap))
45 {
46 g.InterpolationMode = InterpolationMode.HighQualityBicubic;
47 g.DrawImage(bitmap, 0, 0, width, height);
48 }
49
50 return scaledBitmap;
51 }
52
53 /// <summary>
54 /// Scales the bitmap to the passed target size by respecting the aspect.
55 /// </summary>
56 /// <param name="bitmap">The source bitmap.</param>
57 /// <param name="size">The target size.</param>
58 /// <returns>The scaled bitmap</returns>
59 /// <example><code>
60 /// var bitmap = new Bitmap("image.png");
61 /// var thumbnail = bitmap.ScaleProportional(100, 100);
62 /// </code></example>
63 /// <remarks>Please keep in mind that the returned bitmaps size might not match the desired size due to original bitmaps aspect.</remarks>
64 public static Bitmap ScaleProportional(this Bitmap bitmap, Size size)
65 {
66 return bitmap.ScaleProportional(size.Width, size.Height);
67 }
68
69 /// <summary>
70 /// Scales the bitmap to the passed target size by respecting the aspect.
71 /// </summary>
72 /// <param name="bitmap">The source bitmap.</param>
73 /// <param name="width">The target width.</param>
74 /// <param name="height">The target height.</param>
75 /// <returns>The scaled bitmap</returns>
76 /// <example><code>
77 /// var bitmap = new Bitmap("image.png");
78 /// var thumbnail = bitmap.ScaleProportional(100, 100);
79 /// </code></example>
80 /// <remarks>Please keep in mind that the returned bitmaps size might not match the desired size due to original bitmaps aspect.</remarks>
81 public static Bitmap ScaleProportional(this Bitmap bitmap, int width, int height)
82 {
83 float proportionalWidth, proportionalHeight;
84
85 if (width.Equals(0))
86 {
87 proportionalWidth = ((float)height) / bitmap.Size.Height * bitmap.Width;
88 proportionalHeight = height;
89 }
90 else if (height.Equals(0))
91 {
92 proportionalWidth = width;
93 proportionalHeight = ((float)width) / bitmap.Size.Width * bitmap.Height;
94 }
95 else if (((float)width) / bitmap.Size.Width * bitmap.Size.Height <= height)
96 {
97 proportionalWidth = width;
98 proportionalHeight = ((float)width) / bitmap.Size.Width * bitmap.Height;
99 }
100 else
101 {
102 proportionalWidth = ((float)height) / bitmap.Size.Height * bitmap.Width;
103 proportionalHeight = height;
104 }
105
106 return bitmap.ScaleToSize((int)proportionalWidth, (int)proportionalHeight);
107 }
108
109 /// <summary>
110 /// Scales the bitmap to the passed target size by respecting the aspect. The overlapping background is filled with the given background color.
111 /// </summary>
112 /// <param name="bitmap">The source bitmap.</param>
113 /// <param name="size">The target size.</param>
114 /// <returns>The scaled bitmap</returns>
115 /// <example><code>
116 /// var bitmap = new Bitmap("image.png");
117 /// var thumbnail = bitmap.ScaleToSizeProportional(100, 100);
118 /// </code></example>
119 public static Bitmap ScaleToSizeProportional(this Bitmap bitmap, Size size)
120 {
121 return bitmap.ScaleToSizeProportional(Color.White, size);
122 }
123
124 /// <summary>
125 /// Scales the bitmap to the passed target size by respecting the aspect. The overlapping background is filled with the given background color.
126 /// </summary>
127 /// <param name="bitmap">The source bitmap.</param>
128 /// <param name="backgroundColor">The color of the background.</param>
129 /// <param name="size">The target size.</param>
130 /// <returns>The scaled bitmap</returns>
131 /// <example><code>
132 /// var bitmap = new Bitmap("image.png");
133 /// var thumbnail = bitmap.ScaleToSizeProportional(100, 100);
134 /// </code></example>
135 public static Bitmap ScaleToSizeProportional(this Bitmap bitmap, Color backgroundColor, Size size)
136 {
137 return bitmap.ScaleToSizeProportional(backgroundColor, size.Width, size.Height);
138 }
139
140 /// <summary>
141 /// Scales the bitmap to the passed target size by respecting the aspect. The overlapping background is filled with the given background color.
142 /// </summary>
143 /// <param name="bitmap">The source bitmap.</param>
144 /// <param name="width">The target width.</param>
145 /// <param name="height">The target height.</param>
146 /// <returns>The scaled bitmap</returns>
147 /// <example><code>
148 /// var bitmap = new Bitmap("image.png");
149 /// var thumbnail = bitmap.ScaleToSizeProportional(100, 100);
150 /// </code></example>
151 public static Bitmap ScaleToSizeProportional(this Bitmap bitmap, int width, int height)
152 {
153 return bitmap.ScaleToSizeProportional(Color.White, width, height);
154 }
155
156 /// <summary>
157 /// Scales the bitmap to the passed target size by respecting the aspect. The overlapping background is filled with the given background color.
158 /// </summary>
159 /// <param name="bitmap">The source bitmap.</param>
160 /// <param name="backgroundColor">The color of the background.</param>
161 /// <param name="width">The target width.</param>
162 /// <param name="height">The target height.</param>
163 /// <returns>The scaled bitmap</returns>
164 /// <example><code>
165 /// var bitmap = new Bitmap("image.png");
166 /// var thumbnail = bitmap.ScaleToSizeProportional(100, 100);
167 /// </code></example>
168 public static Bitmap ScaleToSizeProportional(this Bitmap bitmap, Color backgroundColor, int width, int height)
169 {
170 var scaledBitmap = new Bitmap(width, height);
171 using (var g = Graphics.FromImage(scaledBitmap))
172 {
173 g.Clear(backgroundColor);
174
175 var proportionalBitmap = bitmap.ScaleProportional(width, height);
176
177 var imagePosition = new Point
178 (
179 (int)((width - proportionalBitmap.Width) / 2m),
180 (int)((height - proportionalBitmap.Height) / 2m)
181 );
182
183 g.DrawImage(proportionalBitmap, imagePosition);
184 }
185
186 return scaledBitmap;
187 }
188
189 #endregion
190 }
191 }