author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 00:10:53 +0300 | |
changeset 79 | 2f468c1958d0 |
parent 61 | bf7ee68962da |
child 80 | d6dafc5d983f |
permissions | -rw-r--r-- |
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/******************************************************************************* |
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* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* Nokia Corporation - initial implementation |
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*******************************************************************************/ |
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package org.eclipse.swt.internal.qt.graphics; |
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|
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import java.io.*; |
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|
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import org.eclipse.swt.graphics.Point; |
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import org.eclipse.swt.graphics.Device; |
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/** |
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* ImageLoader is class for image loading from various data formats. |
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* |
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* |
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*/ |
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|
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final public class ImageLoader { |
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|
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/** |
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* Size of block, in bytes, used for transferring read data to native side in iterative way. |
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* Value given for this field affects on the memory consumption peak when loading |
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* data trough java to native buffer. If value is very small, i.e. 100 the transfer |
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* takes place many times and may result in performance loss, however memory usage will |
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* be steadier. With bigger value transfer is faster but, it creates steeper peak in |
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* memory consumption. |
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* |
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* If value is negative or zero, then block size is set based on InputStream.available(), otherwise |
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* given positive integer value is used as block size (e.g. 4096). |
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* Negative values are not allowed. |
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*/ |
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private static final int BLOCKSIZE = 0; |
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|
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/** |
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* Native imageloader handle |
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*/ |
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private int handle = 0; |
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|
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/** |
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* Status of native peer |
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*/ |
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private boolean disposed; |
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|
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/** |
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* Creates an instance of this class and initializes native |
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* image loader. |
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*/ |
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public ImageLoader() { |
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Utils.validateUiThread(); |
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handle = OS.imageLoader_init(); |
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if (handle == 0) { |
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throw new OutOfMemoryError(); |
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} |
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disposed = false; |
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} |
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|
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/** |
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* Disposes native image, i.e. frees resources. |
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*/ |
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public void dispose() { |
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Utils.validateUiThread(); |
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if (disposed) { |
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return; |
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} else { |
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OS.imageLoader_dispose(handle); |
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handle = 0; |
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disposed = true; |
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} |
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} |
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|
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/** |
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* Gets the status of this image loader. |
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* |
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* @return True if this instance has been already disposed otherwise false |
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*/ |
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public boolean isDisposed() { |
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return disposed; |
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} |
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|
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/** |
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* Loads image from path specified. |
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* Throws an error of image loading fails or it is unsupported format. |
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* |
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* @param path The path for image to be loaded |
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* @return Instance of loaded image |
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* @throws NullPointerException if path is null |
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* @throws OutOfMemoryError if memory allocation for new image fails |
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* @throws IOException if image cannot be loaded |
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* @throws IllegalStateException if image data is invalid |
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* @throws IllegalArgumentException if image format is not supported |
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*/ |
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public Image loadImage(String path) throws IOException { |
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checkState(); |
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|
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|
101 |
if (path == null) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
102 |
throw new NullPointerException("path is null"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
103 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
104 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
105 |
InputStream is = getClass().getResourceAsStream(path); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
106 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
107 |
if (is == null) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
108 |
throw new IOException("Cannot obtain inputstream for given path: " +path); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
109 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
110 |
return loadImage(is); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
111 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
112 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
113 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
114 |
* Loads image from given byte array. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
115 |
* |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
116 |
* @param data The array containing image data |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
117 |
* @param offset The offset from beginnig of data where image data starts |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
118 |
* @param length The length of data beginning form offset |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
119 |
* @return Instance of loaded image |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
120 |
* @throws NullPointerException if data is null |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
121 |
* @throws IllegalArgumentException if offset is less than 0 |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
122 |
* @throws IllegalArgumentException if length is equal or less than 0 |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
123 |
* @throws ArrayIndexOutOfBoundsException if offset and length define an invalid range |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
124 |
* @throws IOException if image cannot be loaded or it is unsupported format |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
125 |
* @throws OutOfMemoryError if native buffer allocation fails |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
126 |
*/ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
127 |
public Image loadImage(byte[] data, int offset, int length) throws IOException { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
128 |
checkState(); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
129 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
130 |
if (data == null) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
131 |
throw new NullPointerException("data is null"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
132 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
133 |
if (offset < 0) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
134 |
throw new IllegalArgumentException("offset is negative"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
135 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
136 |
if (length <= 0) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
137 |
throw new IllegalArgumentException("length is negative or zero"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
138 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
139 |
if ((offset + length) > data.length) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
140 |
throw new ArrayIndexOutOfBoundsException("offset and lenght define invalid range"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
141 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
142 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
143 |
// All checks ok, so upload data to loader, with one go |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
144 |
OS.imageLoader_beginStream(handle, length + 1); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
145 |
OS.imageLoader_append(handle, length, offset, data); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
146 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
147 |
return new Image(OS.imageLoader_endStream(handle)); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
148 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
149 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
150 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
151 |
* Loads image from file directly using the native APIs. Note that Java |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
152 |
* security checks are not done. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
153 |
* |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
154 |
* @param filename The filename to pass to the native APIs. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
155 |
* @return Image The loaded image. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
156 |
* @throws IOException |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
157 |
*/ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
158 |
public Image nativelyLoadImageFromFileNoSecurity(String filename) throws IOException { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
159 |
checkState(); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
160 |
if (filename == null) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
161 |
throw new NullPointerException("data is null"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
162 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
163 |
return new Image(OS.imageLoader_load(handle, filename)); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
164 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
165 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
166 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
167 |
* Contructs an instance of Image by reading image data from given InputStream. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
168 |
* |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
169 |
* @param is The InputStream from where to read the image data from |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
170 |
* @return Instance of loaded image |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
171 |
* @throws NullPointerException if InputStream is is null |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
172 |
* @throws IOException if image cannot be loaded |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
173 |
* @throws OutOfMemoryError if allocation of native buffer of image creation fails |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
174 |
* @throws IllegalStateException if image data is invalid |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
175 |
* @throws IllegalArgumentException if image format is not supported |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
176 |
*/ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
177 |
public Image loadImage(InputStream is) throws IOException { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
178 |
checkState(); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
179 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
180 |
if (is == null) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
181 |
throw new NullPointerException("InputStream is null"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
182 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
183 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
184 |
int bytesRead = 0; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
185 |
int bytesAvailable = 0; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
186 |
byte[] data; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
187 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
// Determine transfer buffer size |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
if (BLOCKSIZE <= 0) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
190 |
bytesAvailable = is.available(); // may throw IOException |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
192 |
if (bytesAvailable == 0) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
193 |
throw new IllegalArgumentException("Empty file"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
194 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
195 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
196 |
data = new byte[bytesAvailable]; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
197 |
} else { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
198 |
data = new byte[BLOCKSIZE]; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
199 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
200 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
// Start streaming to native buffer, with initial buffer size |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
OS.imageLoader_beginStream(handle, bytesAvailable); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
204 |
// Read input stream and pass blocks to native buffer |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
205 |
try { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
206 |
while ((bytesRead = is.read(data, 0, data.length)) != -1) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
207 |
OS.imageLoader_append(handle, bytesRead, 0, data); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
209 |
} catch (IOException e) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
210 |
// Throw exception forward, native loader automatically resets state |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
211 |
// when problems occur so there's no need to do any extra native calls here |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
212 |
throw e; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
213 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
214 |
catch (IllegalStateException e) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
215 |
throw e; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
216 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
217 |
catch (IllegalArgumentException e) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
218 |
throw e; |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
219 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
220 |
return new Image(OS.imageLoader_endStream(handle)); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
221 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
222 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
223 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
224 |
* Sets the size that the Image will be scaled to when loaded. Useful for |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
225 |
* SVG images. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
226 |
* @param width The width to scale to |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
227 |
* @param height The height to scale to |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
228 |
*/ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
229 |
public void setLoadSize(int width, int height) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
230 |
OS.imageLoader_setLoadSize(handle, width, height); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
231 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
232 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
233 |
/** |
61
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
234 |
* Returns the bounds of an Image without creating an actual Image instance. |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
235 |
* |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
236 |
* @param is The InputStream from where to read the image data from |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
237 |
* @return Bounds of the image |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
238 |
*/ |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
239 |
public static Point getImageSize(InputStream is) throws IOException { |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
240 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
241 |
if (is == null) { |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
242 |
throw new NullPointerException("InputStream is null"); |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
243 |
} |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
244 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
245 |
int bytesAvailable = is.available(); // may throw IOException |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
246 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
247 |
if (bytesAvailable == 0) { |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
248 |
throw new IllegalArgumentException("Empty file"); |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
249 |
} |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
250 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
251 |
byte [] data = new byte[bytesAvailable]; |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
252 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
253 |
if (is.read(data, 0, data.length) != bytesAvailable) { |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
254 |
throw new IOException("Could not load data from InputStream"); |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
255 |
} |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
256 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
257 |
return OS.imageLoader_getImageSize(data); |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
258 |
} |
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
259 |
|
bf7ee68962da
Revision: v2.2.9
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
21
diff
changeset
|
260 |
/** |
21
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
261 |
* Private helper to check the state of the current instance. |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
262 |
*/ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
263 |
private void checkState() { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
264 |
Utils.validateUiThread(); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
265 |
if (disposed) { |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
266 |
throw new IllegalStateException("Image loader already disposed"); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
267 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
268 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
269 |
} |