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
|
//
// System.Drawing.Imaging.EncoderParameters.cs
//
// Author:
// Ravindra (rkumar@novell.com)
// Vladimir Vukicevic (vladimir@pobox.com)
//
// (C) 2004 Novell, Inc. http://www.novell.com
//
//
// Copyright (C) 2004 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;
using System.Runtime.InteropServices;
namespace System.Drawing.Imaging
{
public sealed class EncoderParameters : IDisposable
{
private EncoderParameter[] parameters;
public EncoderParameters () {
parameters = new EncoderParameter[1];
}
public EncoderParameters (int count) {
parameters = new EncoderParameter[count];
}
public EncoderParameter[] Param {
get {
return parameters;
}
set {
parameters = value;
}
}
public void Dispose () {
// Nothing
GC.SuppressFinalize(this);
}
#if !TARGET_JVM
internal IntPtr ToNativePtr () {
IntPtr result;
IntPtr ptr;
// 4 is the initial int32 "count" value
result = Marshal.AllocHGlobal (4 + parameters.Length * EncoderParameter.NativeSize());
ptr = result;
Marshal.WriteInt32 (ptr, parameters.Length);
ptr = (IntPtr) (ptr.ToInt64() + 4);
for (int i = 0; i < parameters.Length; i++) {
parameters[i].ToNativePtr (ptr);
ptr = (IntPtr) ((int) ptr + EncoderParameter.NativeSize());
}
return result;
}
/* The IntPtr passed in here is a blob returned from
* GdipImageGetEncoderParameterList. Its internal pointers
* (i.e. the Value pointers in the EncoderParameter entries)
* point to areas within this block of memeory; this means
* that we need to free it as a whole, and also means that
* we can't Marshal.PtrToStruct our way to victory.
*/
internal static EncoderParameters FromNativePtr (IntPtr epPtr) {
if (epPtr == IntPtr.Zero)
return null;
IntPtr ptr = epPtr;
int count = Marshal.ReadInt32 (ptr);
ptr = (IntPtr) (ptr.ToInt64() + 4);
if (count == 0)
return null;
EncoderParameters result = new EncoderParameters (count);
for (int i = 0; i < count; i++) {
result.parameters[i] = EncoderParameter.FromNativePtr (ptr);
ptr = (IntPtr) ((int) ptr + EncoderParameter.NativeSize());
}
return result;
}
#endif
}
}
|
