1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
namespace MediaBrowser.Model.Drawing
{
/// <summary>
/// Class DrawingUtils
/// </summary>
public static class DrawingUtils
{
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="scaleFactor">The scale factor.</param>
/// <returns>ImageSize.</returns>
public static ImageSize Scale(double currentWidth, double currentHeight, double scaleFactor)
{
return Scale(new ImageSize
{
Width = currentWidth,
Height = currentHeight
}, scaleFactor);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="size">The size.</param>
/// <param name="scaleFactor">The scale factor.</param>
/// <returns>ImageSize.</returns>
public static ImageSize Scale(ImageSize size, double scaleFactor)
{
double newWidth = size.Width * scaleFactor;
return Resize(size.Width, size.Height, newWidth, null, null, null);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="maxWidth">A max fixed width, if desired</param>
/// <param name="maxHeight">A max fixed height, if desired</param>
/// <returns>ImageSize.</returns>
public static ImageSize Resize(double currentWidth,
double currentHeight,
double? width,
double? height,
double? maxWidth,
double? maxHeight)
{
return Resize(new ImageSize
{
Width = currentWidth,
Height = currentHeight
}, width, height, maxWidth, maxHeight);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="size">The original size object</param>
/// <param name="width">A new fixed width, if desired</param>
/// <param name="height">A new fixed height, if desired</param>
/// <param name="maxWidth">A max fixed width, if desired</param>
/// <param name="maxHeight">A max fixed height, if desired</param>
/// <returns>A new size object</returns>
public static ImageSize Resize(ImageSize size,
double? width,
double? height,
double? maxWidth,
double? maxHeight)
{
double newWidth = size.Width;
double newHeight = size.Height;
if (width.HasValue && height.HasValue)
{
newWidth = width.Value;
newHeight = height.Value;
}
else if (height.HasValue)
{
newWidth = GetNewWidth(newHeight, newWidth, height.Value);
newHeight = height.Value;
}
else if (width.HasValue)
{
newHeight = GetNewHeight(newHeight, newWidth, width.Value);
newWidth = width.Value;
}
if (maxHeight.HasValue && maxHeight.Value < newHeight)
{
newWidth = GetNewWidth(newHeight, newWidth, maxHeight.Value);
newHeight = maxHeight.Value;
}
if (maxWidth.HasValue && maxWidth.Value < newWidth)
{
newHeight = GetNewHeight(newHeight, newWidth, maxWidth.Value);
newWidth = maxWidth.Value;
}
return new ImageSize { Width = newWidth, Height = newHeight };
}
/// <summary>
/// Gets the new width.
/// </summary>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="newHeight">The new height.</param>
/// <returns>System.Double.</returns>
private static double GetNewWidth(double currentHeight, double currentWidth, double newHeight)
{
double scaleFactor = newHeight;
scaleFactor /= currentHeight;
scaleFactor *= currentWidth;
return scaleFactor;
}
/// <summary>
/// Gets the new height.
/// </summary>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="newWidth">The new width.</param>
/// <returns>System.Double.</returns>
private static double GetNewHeight(double currentHeight, double currentWidth, double newWidth)
{
double scaleFactor = newWidth;
scaleFactor /= currentWidth;
scaleFactor *= currentHeight;
return scaleFactor;
}
}
}
|
