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Feenn — Wed, 04 Mar 2020 05:56:00 GMT

��法��是��单的逐行逐列剪枝法，只不�q�加入了�q�程的可视化。支持�Q意Size的puzzle�Q�支持三�U�可视化�Ҏ��Q?br />1.Console字符输出�Q?/strong>

2.Console输入�Q�带有ANSI Color字符�Q�需要Terminal支持�Q�Windows下推荐��用cmder�{�）

3. �H�口输出�Q�在�H�口中输出结果，支持保存囄��Q�支持查看每一步�?/strong>

源代码：https://github.com/feenn/nonogram

Feenn 2020-03-04 13:56 发表评论

数独解题Demo�E�序-Sudoku

Feenn — Tue, 14 May 2019 01:59:00 GMT
用Processing写的Demo�Q�主要是�l�教学用的�?br />

可录入初始数字摆攑ָ�局

可计��题解方案的��M��敎ͼ�当然极限�Ҏ��L��6670903752021072936960的计��朝�U�了�Q?br />

可自动演�C�每一�?/li>
可手动单步或回退

Feenn 2019-05-14 09:59 发表评论

Maven-Shade-Plugin打包SWT及JFace遇到的问题及解决�Ҏ��

Feenn — Mon, 29 Apr 2019 08:33:00 GMT

一、问�?/h3> 当开�?nbsp;minimizeJar 后，�_��的Jar�q�行会出现如下错误：

The image could not be loaded: FileImageDescriptor(location=class org.eclipse.jface.dialogs.TitleAreaDialog, name=images/title_banner.png)
org.eclipse.jface.resource.DeviceResourceException: Unable to create resource FileImageDescriptor(location=class org.eclipse.jface.dialogs.TitleAreaDialog, name=images/title_banner.png)
        at org.eclipse.jface.resource.ImageDescriptor.createResource(ImageDescriptor.java:184)
        at org.eclipse.jface.resource.DeviceResourceManager.allocate(DeviceResourceManager.java:55)
        at org.eclipse.jface.resource.AbstractResourceManager.create(AbstractResourceManager.java:88)
        at org.eclipse.jface.resource.ResourceManager.createImageWithDefault(ResourceManager.java:195)
…………

出现�q�个错误的直接现象是所有的囄��——包括图标——都无法正��显�C��?br />

二、分�?/h3> 开始以为是resources打包错误��D��没有被压�q�jar包，不过分析jar包内容发现�ƈ没有文�g�~�失�Q�然后开始分析minimizeJar的机制。文档上��_��

When true, dependencies will be stripped down on the class level to only the transitive hull required for the artifact. Note: Usage of this feature requires Java 1.5 or higher.

由此来看�Q�shade做的只是做了静态调用分析，�q�没有做动态类加蝲�q�行分析�Q�因此极大可能问题是出在�q�里了。而且从抛出的异常来看�Q�有可能是图片文件格式无法解析导致了囄��资源创徏��p�|�?br />
那么之后的调试方法就��单了�Q�首先上verbose大法�Q�直接加verbose:class参数�Q�分别运行正常的和异常的Jar包，从输��Z��息发��C��端倪：

[Loaded java.lang.IndexOutOfBoundsException from C:\Program Files\Java\jre1.8.0_151\lib\rt.jar]
[Loaded java.lang.ArrayIndexOutOfBoundsException from C:\Program Files\Java\jre1.8.0_151\lib\rt.jar]
[Loaded org.eclipse.swt.internal.image.WinBMPFileFormat from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.GIFFileFormat from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.WinICOFileFormat from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.JPEGFileFormat from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.JPEGSegment from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.JPEGFixedSizeSegment from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.JPEGStartOfImage from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PNGFileFormat from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngInputStream from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngDecodingDataStream from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngChunkReader from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngIhdrChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngFileReadState from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngPlteChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngIdatChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngIendChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.image.PngTrnsChunk from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.win32.BITMAPINFOHEADER from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.jface.window.ToolTip$ToolTipOwnerControlListener from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.jface.window.ToolTip$$Lambda$19/1873653341 from org.eclipse.jface.window.ToolTip]
[Loaded org.cncert.xac.utils.ResourceManager from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.widgets.ToolItem from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.internal.win32.TBBUTTON from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.jface.resource.AbstractResourceManager$RefCount from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.layout.FormData from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.swt.layout.FormAttachment from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.jface.dialogs.TitleAreaDialog$1 from file:/E:/Temp/*****.jar]
[Loaded org.eclipse.jface.window.ToolTip$TooltipHideListener from file:/E:/Temp/*****.jar]

注意上方�U�色的字体，在异常的Jar包输��Z��是没有的�Q�同时检查了Jar包中果然没有打包�q�几个类�Q�将�q�几个类手动加入Jar包后�Q�异常的Jar包可以正常运行了�?br />
从源代码看，�q�几个类型是SWT在运行时动态加载的�Q�由 org.eclipse.swt.internal.image.FileFormat 动态加载，相关代码如下�Q?br />

package org.eclipse.swt.internal.image;

import java.io.*;

import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;

/**
* Abstract factory class for loading/unloading images from files or streams
* in various image file formats.
*
*/
public abstract class FileFormat {
    static final String FORMAT_PACKAGE = "org.eclipse.swt.internal.image"; //$NON-NLS-1$
    static final String FORMAT_SUFFIX = "FileFormat"; //$NON-NLS-1$
    static final String[] FORMATS = {"WinBMP", "WinBMP", "GIF", "WinICO", "JPEG", "PNG", "TIFF", "OS2BMP"}; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$//$NON-NLS-5$ //$NON-NLS-6$//$NON-NLS-7$//$NON-NLS-8$

    LEDataInputStream inputStream;
    LEDataOutputStream outputStream;
    ImageLoader loader;
    int compression;

static FileFormat getFileFormat (LEDataInputStream stream, String format) throws Exception {
    Class clazz = Class.forName(FORMAT_PACKAGE + '.' + format + FORMAT_SUFFIX);
    FileFormat fileFormat = (FileFormat) clazz.getDeclaredConstructor().newInstance();
    if (fileFormat.isFileFormat(stream)) return fileFormat;
    return null;
}

三、Maven配置的修�?/h3> 在官�Ҏ��档中�Q�可以��用filter来显式包含不惌��minimizeJar优化掉的内容�Q�但是目前filter�q�无法做到针对一个artifact中选择性对某个目录下的文�g不做优化�?br /> 例如�Q�我希望shade不对org/eclipse/swt/internal/image/**做优化，我的配置是这��L��Q?br />

<filter>
     <artifact>org.eclipse:swt.win32.x86_64artifact>
     <includes>
  <include>org/eclipse/swt/internal/image/**include>
     includes>
filter>

但最�l�的�l�果是只打包了这个目录内的类�Q�而这个artifact中的其他�c�d��部被removed�Q�因�?a >官方demo中有�q�样一句话�Q?br />

As of version 1.6, minimizeJar will respect classes that were specifically marked for inclusion in a filter. Note that specifying an include filter for classes in an artifact implicitly excludes all non-specified classes in that artifact.

所以我只能让shade��swt的artifact全部保留�Q�不做优化�?br />

<filter>
       <artifact>org.eclipse:swt.win32.x86_64artifact>
       <includes>
  <include>**include>
includes>
filter>

或者��用artifactSet辑ֈ�同样的效果�?br />
四、�ȝ��

目前shade的机制是静态分析，所以可能会优化掉很多动态加载的�c�，对于使用动态加载较多的工程�Q�在发布旉��要特别注意�?

目前shade的配�|�无法在一个artifact内显式指定某个�\径不优化�Q�或许有�Q�但我确实没扑ֈ��Q�欢�q�知道的朋友留言告知�Q�，只能昑ּ�保留整个artifact不做优化�?

Feenn 2019-04-29 16:33 发表评论

Eclipse更新后手工清理Plugins中旧文�g的小�E�序

Feenn — Thu, 11 Jun 2015 06:12:00 GMT
Eclipse更新时会对Features和Plugins的文件进行一定的清理�Q�经�q�观察发现Eclipse的清理动作如下：
Features目录会自动更新无需手工清理�?/li>
Plugins目录中的source jar会自动清理，而运行jar包会保留之前的一个版本�?/li>
��Z��冗余的考虑�Q�一般来讲不需要手工清理Plugins目录�Q�而手工清理通常需要借助TC�{�工具逐项�Ҏ��后删除，需仔细且难保出现错误。因此，写了一个可自动清理Plugins中旧Jar包的辅助�E�序�?br />该程序通过�Ҏ��Plugins中相同包名的Jar包文�Ӟ��自动删除较旧的Jar包，用了一些小技巧：
比较版本时直接��用了文�g的修�Ҏ��间比较，当然�q�是一�U�比较懒的方法，有可能会出错�?/li>
删除时��用了JNA提供的删除到回收站的�Ҏ��Q�以防出错后可以恢复�?/li>
源代码见下�?br />
1 package org.tsinghua.benjamin;
  2
  3 import java.io.File;
  4 import java.io.FileFilter;
  5 import java.io.IOException;
  6 import java.util.ArrayList;
  7 import java.util.HashMap;
  8 import java.util.Iterator;
  9 import java.util.List;
10
11 import com.sun.jna.platform.FileUtils;
12
13 public class EclipseUpdateCleaner {
14
15 //    private static final String pluginPath = "d:\\Eclipse\\x86\\Luna\\plugins\\";
16     private static final String pluginPath = "d:\\Eclipse\\x64\\Luna\\plugins\\";
17     private static final HashMap> mapDir = new HashMap<>();
18     private static final HashMap> mapJar = new HashMap<>();
19
20     private static final class PluginFilter implements FileFilter {
21
22         @Override
23         public boolean accept(File pathname) {
24             if (pathname == null || !pathname.exists())
25                 return false;
26             if (pathname.isDirectory())
27                 return true;
28
29             if (pathname.getName().toLowerCase().endsWith(".jar"))
30                 return true;
31             return false;
32         }
33
34     }
35
36     public static void main(String[] args) {
37         File file = new File(pluginPath);
38         if(!file.exists() || !file.isDirectory())
39             return;
40
41         File[] files = file.listFiles(new PluginFilter());
42         for (File file2 : files) {
43             String name = file2.getName();
44             int index = name.indexOf('_');
45             assert(index > 0);
46             String key = name.substring(0, index);
47             String value = name.substring(index + 1);
48             if(file2.isDirectory()) {
49                 addToMap(mapDir, key, value);
50             } else {
51                 addToMap(mapJar, key, value);
52             }
53         }
54
55         System.out.println("---Dir---");
56         recycleOldJars(mapDir);
57
58         System.out.println("---Jar---");
59         recycleOldJars(mapJar);
60     }
61
62     /**
63      * @param map
64      * @param key
65      * @param value
66      */
67     protected static void addToMap(HashMap> map, String key, String value) {
68         if(mapDir.containsKey(key)) {
69             List list = map.get(key);
70             list.add(value);
71         } else {
72             map.put(key, new ArrayList(){
73                 private static final long serialVersionUID = 7647872335210732416L;
74
75             {
76                 add(value);
77             }});
78         }
79     }
80
81     /**
82      * @param fileUtils
83      * @param iterator
84      */
85     protected static void recycleOldJars(HashMap> map) {
86         Iterator iterator = map.keySet().iterator();
87         FileUtils fileUtils = FileUtils.getInstance();
88         while(iterator.hasNext()) {
89             String next = iterator.next();
90             List list = map.get(next);
91             if(list.size() < 2)
92                 continue;
93             else {
94                 File curr = new File(pluginPath, next + "_" + list.get(0));
95                 List files = new ArrayList();
96                 for(int i = 1; i < list.size(); i++) {
97                     File temp = new File(pluginPath, next + "_" + list.get(i));
98                     if(temp.lastModified() > curr.lastModified()) {
99                         files.add(curr);
100                         curr = temp;
101                     }
102                 }
103
104                 System.out.println(String.format("[new]%s", curr.getName()));
105                 File[] rs = new File[files.size()];
106                 for (int i = 0; i < rs.length; i++) {
107                     rs[i] = files.get(i);
108                     System.out.println(String.format("\t[delete]%s", rs[i].getName()));
109                 }
110
111                 if(fileUtils.hasTrash()) {
112                     try {
113                         fileUtils.moveToTrash(rs);
114                     } catch (IOException e) {
115                         e.printStackTrace();
116                     }
117                 }
118             }
119         }
120     }
121
122 }
123

Feenn 2015-06-11 14:12 发表评论

XULRunner on 64-bit Windows

Feenn — Sat, 18 May 2013 02:15:00 GMT
Eclipse 4.3M7�Q?span style="font-family: verdana, arial, helvetica, geneva; font-size: 13px; line-height: normal;">The browser widget now supports the embedding of XULRunner on Windows x86_64.

�l�于能支持了�Q?br />
http://download.eclipse.org/eclipse/downloads/drops4/S-4.3M7-201305020800/news/

Feenn 2013-05-18 10:15 发表评论

Feenn — Fri, 27 Jul 2012 08:41:00 GMT
今天�H�然遇到的这个问题，在网上搜索了一下，发现在Stack上面也有人遇��C��?br />
原文在此�Q?a >http://stackoverflow.com/questions/7058782/how-to-force-eclipse-to-ask-for-default-workspace

症状是这��L��Q�启动后默认打开一个目录作为workspace�Q�该目录是我之前从来没配�|�过的。无论是在选项中勾�?#8220;Prompt for workspace on startup”�Q�还是删除eclipse的配�|�文件均无法再次让eclipse询问�q�更攚w��认workspace路径�?br />
试过一些方法，比如启动两个eclipse指向同一个�\径，�q�样会�ɽW�二个eclipse�q�程询问一个新的workspace路径。但是此�Ҏ��Ҏ��无效�?br />
于是在stackoverflow上找��C��一个解��x��法：命��o行执�?#8220;eclipse -clean”�Q�启动eclipse�Q�然后终于就正常了�?br />
查了一下eclipse startup parameters中关于此��的解释�Q�貌似是��osgi的一些cache清除了。回忆�v之前曄��在eclipse假死状态下杀掉了javaw�q�程�Q�可能是因此而导致的�?br />
anyway�Q�找��C��Ҏ��q�解决了此问题，�Ҏ��记录�?br />

Feenn 2012-07-27 16:41 发表评论

Feenn — Fri, 01 Jun 2012 12:58:00 GMT
春节闲来无事�Q�突然想起大一的时候第一�ơ学习编�E�看到的一个演�C�程序：自己心里想一个数字，然后电脑来猜�Q�当时印象极为深刻，��其是用格子的�Ş式动态展�C��机猜数的过�E�，甚�ؓ好看�Q�于是用了一下午把它写了出来。今日偶然翻出来觉得挺有意思的�Q�遂挂出来仅供大家一�W�~

��法上基本没有技术含量，当然如果能加入启发式��法更好。都是技术活�Q�纯体力的，用到了之前说�q�的炚w��字符。有兴趣的筒子可以拿�ȝ��玩�?br />
1. 实现了两�U�方式的猜数�Q�计��重复位�?�?不计重复位数。每一�U�还包括数字“包含0”�?#8220;不包�?”两种情况�?br /> 2. 理论上支持�Q意多位数�Q�但是画囄��考虑�Q�只写了四位和六位数�Q?br />

3. 用点阵小灯表�C�猜数过�E�：�U�色点亮��灯代表目前可能的数字，熄灭的表�C�Z��可能的；

4. 可以判断是否对电脑说谎�?br />

当然�Q�最后猜中了电脑也可以搞�W�一把！

额外的体力活�Q?/strong>支持�H�口��L��~�放�Q�可自定义的搞笑短语…………

下蝲�Q?a title="可执行文�? href="/Files/feenn/GuessNumber.rar" style="color: #ff0000; ">可执行文�?/a>  源代�?/a>

【重要说明�?/strong>
1. �E�序中附带的swt库是x64的，如果�?2位系�l�，��h��换libs下面的swt jar包。然后，要么保持原来的jar包名�U�ͼ�要么修改guess.jar中的manifest文�g中的内容�Q?/span>
2. 直接双击guess.exe卛_��执行�Q�该文�g实际上是一个批处理脚本�Q?/span>
3. 源代码无保留发布�Q�eclipse工程。非认真开发，�U�属�׃��Q�各位高手多多指教~

Feenn 2012-06-01 20:58 发表评论

Java生成炚w��字符的思�\

Feenn — Thu, 16 Feb 2012 11:52:00 GMT
基本思�\是向Display�l�制囄��Q�然后通过操作Image上的像素�Ҏ��生成炚w��字库�?br />
�q�里以SWT��Z��Q�代码如下：

1 GC gc = new GC(image);
2 gc.setFont(font); // 讄��字体�Q�事先可以准备好一个字体实�?/span>
3 gc.drawString(ch.toString(), 0, 0);
4
5
6 for (int y = 0; y < size.y; y++) {
7     for (int x = 0; x < size.x; x++) {
8     int pixel = image.getImageData().getPixel(x, y);
9     if (pixel != 0xffffff00) {
10
11   // �q�里对像素值的判断依赖于gc的前景色和背景色讄��Q�通过判断则可以对字符上的每一个像素进行操作，生成炚w��坐标序列(x, y)
12   }
13   }
14 }
15
16 gc.dispose();
17 image.dispose();

当然�q�里可以一�ơ性获得一个String的点�늟�阵，那么需要事先准备多大的image呢？

在SWT中可以��用gc.stringExtent(String...)来获取，代码如下�Q?font color="#008080" size="2">

1 GC gc = new GC(Display.getDefault());
2 gc.setFont(font);
3 Point size = gc.stringExtent(ch.toString()); // 获得了gc实际�l�制区域的大��?/span>
4 gc.dispose();

Feenn 2012-02-16 19:52 发表评论

wxWidgets整合OpenGL+OpenCV+MathPlot(一�U�Windows和Linux通用的方�?

Feenn — Sun, 16 Jan 2011 03:03:00 GMT

写在前面�Q�其实本不应该发在Java斚w��的，只是最�q�在做的��目因�ؓ实时应用的关�p�L��有��用Java�Q�因此借这里记录一下心得�?/div>
最�q�在一个在Linux下开攄��目中用��C��wxWidgets�Q�当时在GTK+、QT和wx之间选择了很久，最�l�确定选择wxWidgets。有兌��个框架的详细信息�Q�请自行google之�?/div>
1�Q?span class="Apple-tab-span" style="white-space: pre; "> 整合OpenGL

WxWidgets中整合OpenGL是十分简单的�Q�因为wxWidgets本��n对OpenGL�q�行了封装，因此只需要按照example中的例子�q�行�~�写卛_��。一�U�常见的�Ҏ��是��承wxGLCanvas�c�，��EVT_PAINT的回调函数进行重载即可。一�D늤�例代码如下：

static int attriblist[] = {
    WX_GL_RGBA, WX_GL_MIN_RED, 1, WX_GL_MIN_GREEN, 1,
    WX_GL_MIN_BLUE, 1, WX_GL_DEPTH_SIZE, 1, WX_GL_DOUBLEBUFFER, None
};

BEGIN_EVENT_TABLE(UIOpenGLCanvas, wxGLCanvas)
    EVT_SIZE(UIOpenGLCanvas::OnSize)
    EVT_PAINT(UIOpenGLCanvas::OnPaint)
    EVT_MOUSE_EVENTS(UIOpenGLCanvas::OnMouseEvent)
END_EVENT_TABLE()

UIOpenGLCanvas::UIOpenGLCanvas(wxWindow *parent, const wxString &caption)
//    :wxGLCanvas(parent, wxID_ANY, attriblist, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE, wxT("GLCanvas"), wxNullPalette)
//    :wxGLCanvas(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE, wxT("GLCanvas"))
    :wxGLCanvas(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE, wxT("GLCanvas"), attriblist, wxNullPalette)
    ,m_caption(caption), count(0) {
    int argc = 1;
    char* argv[1] = { wxString((wxTheApp->argv)[0]).char_str() };

    /*
    NOTE: this example uses GLUT in order to have a free teapot model
    to display, to show 3D capabilities. GLUT, however, seems to cause problems
    on some systems. If you meet problems, first try commenting out glutInit(),
    then try comeenting out all glut code
    */
    glutInit(&argc, argv);
}

UIOpenGLCanvas::~UIOpenGLCanvas() {

}

void UIOpenGLCanvas::OnSize(wxSizeEvent& event) {
    // this is also necessary to update the context on some platforms
    wxGLCanvas::OnSize(event);

    // set GL viewport (not called by wxGLCanvas::OnSize on all platforms)
    int w, h;
    GetClientSize(&w, &h);

    if (GetContext()) {
        SetCurrent();
        glViewport(0, 0, (GLint) w, (GLint) h);
    }
}

void UIOpenGLCanvas::OnMouseEvent(wxMouseEvent& event) {
    static int dragging = 0;
    static float last_x, last_y;

//    printf("%f %f %d\n", event.GetX(), event.GetY(), (int)event.LeftIsDown());
    if(event.LeftIsDown()) {
        if(!dragging) {
            dragging = 1;
        } else {
            yrot += (event.GetX() - last_x)*1.0;
            xrot += (event.GetY() - last_y)*1.0;
            Refresh(false);
        }
        last_x = event.GetX();
        last_y = event.GetY();
    } else
        dragging = 0;

}

void UIOpenGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
    Render();
}

void UIOpenGLCanvas::Render() {
/* 此处很关�?nbsp;*/
    wxPaintDC(this);
    if (!GetContext())
        return;
    SetCurrent();

    glClearColor(0.0, 0.0, 0.0, 0.0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glViewport(0, 0, (GLint)GetSize().x, (GLint)GetSize().y);
    glBegin(GL_POLYGON);
    glColor3f(1.0, 0.0, 0.0);
    glVertex2f(0.1, 0.1);
    glVertex2f(-0.1, 0.1);
    glVertex2f(-0.1, -0.1);
    glVertex2f(0.1, -0.1);
    glEnd();

// using a little of glut
    glColor4f(0,0,1,1);
    glutWireTeapot(0.4);

    glPopMatrix();

    glFlush();
    SwapBuffers();
}

2�Q?span class="Apple-tab-span" style="white-space: pre; "> 整合OpenCV

�q�个话题在网上有�q�讨论，在OpenCV中文论坛中提��Z��一�U�向HDC�l�图的方法。不�q�这�U�方法的局限在于：HDC是Windows�q�_��下特有的�l�构�Q�在Linux下是不可行的�?/div>
其实OpenCV的核心是IplImage�l�构�Q�基本上所有的OpenCV�l�图语句以及相应的算法都可以通过�q�个�l�构衍生出来。因此，一�U�直接的��x��是如何将IplImage转换为wxWidgets中的wxImage�c�d��Q�这样就可以直接在wxWidgets�l�制IplImage�c�d��的数据了。于是在�|�上��L��后，在一个国外论坛中扑ֈ�了现成的代码如下�Q?/div>

void copy_and_swap_rb(char *s, char *d, int size)
{
    // Copy image data source s to destination d, swapping R and B channels.
    // Assumes 8 bit depth, 3 interleaved channels, and width_step = width*3
    const int step = 3;
    char *end = s + size;
    while (s<end) {
        d[0] = s[2];
        d[1] = s[1];
        d[2] = s[0];
        d += step;
        s += step;
    }
}

void wx2cv(wxImage &wx, IplImage *ipl)
{
    // Copy image data from wxWidgets image to Ipl (opencv) image
    // Assumes ipl image has seq "GBR", depth 8, and 3 channels, and
    // has the same size as the wxImage, and width_step = width*3.
    copy_and_swap_rb((char*)wx.GetData(), ipl->imageData, ipl->imageSize);
}

void cv2wx(IplImage *ipl, wxImage &wx )
{
    // Copy image data from Ipl (opencv) image to wxImage
    // Assumes ipl image has seq "GBR", depth 8, and 3 channels, and
    // has the same size as the wxImage, and width_step = width*3.
    copy_and_swap_rb( ipl->imageData, (char*)wx.GetData(),
                      wx.GetWidth()*wx.GetHeight()*3);
}

IplImage *cv_from_wx(wxImage &wx)
{
    // Return a new IplImage copied from a wxImage.
    // Must be freed by user with cvReleaseImage().
    IplImage *ret = cvCreateImage(cvSize(wx.GetWidth(), wx.GetHeight()),
                                  IPL_DEPTH_8U, 3);
    wx2cv(wx, ret);
    return ret;
}

wxImage wx_from_cv( IplImage *cx)
{
    // Return new wxImage copied from a compatible IplImage.
    // Assumes ipl image has seq "GBR", depth 8, and 3 channels
    // Fear not. The copy on return is cheap; does not deep-copy the data.
    wxImage wx(cx->width, cx->height, (unsigned char*) malloc(cx->imageSize), false);
    cv2wx(cx, wx);
    return wx;
}

�q�行�q�样的�{换后�Q�我们就直接可以在wxWidgets中��用OpenCV的接口�?/div>
3�Q?span class="Apple-tab-span" style="white-space: pre; "> 整合MathPlot

MathPlot是sourceforge上的一个开源项目，其功能是使用wxWidgets提供的绘图方法构建操作DC�l�图的高�U�接口。这个项目的源代码十分简单，只有两个文�g�Q�但是功能却很实用。我在sourceforge上给了好评�?/div>
MathPlot内部实现了坐标��u的拖拽、��^�U�d��~�放�Q�将囑�Ş划分为Layer�Q��ƈ且引入了动态Layer的概念，卛_��q�个Layer上绘制的囑�Ş可以通过重设局部坐标系的原点基准坐标实现移动，�q�绘制轨�q�V��而且�Q�MathPlot内部实现了双�~�冲�Q�因此，�q�个框架对于需要实时显�C��q�的��单应用来说具有很好��用�h倹{�?/div>
�׃��MathPlot直接使用了wxWidgets的绘图接口，因此其整合十分简单，只需要在需要绘制的Panel上��用MathPlot提供的接口即可实现整合�?/div>

以上��单说明了wxWidgets如何整合OpenGL、OpenCV和MathPlot三种不同的绘图框�Ӟ��最后给一个将三种�l�图�Ҏ��用在同一个窗口中实现不同功能的实例：

Feenn 2011-01-16 11:03 发表评论

Javadoc的chm制作

Feenn — Tue, 12 Jan 2010 06:22:00 GMT

最�q�看�?a href="http://www.tkk7.com/lishunli/archive/2010/01/07/308618.html">一��文�?/a>�Q�其中讲�q�C��各种Javadoc生成chm的方法及工具�?/p>
其实我一直以来都是��用自己写的一个工��h��生成的，不过�q�个工具只是生成�?hhp�?hhc�?hhk文�g�Q�最后还需要��用FAR�q�行��单的�~�辑和压�~�。不�q�我的工具可以配�|��ƈ识别目录中包含多个API目录的情况，�q�能够将非API的部分生成TOC文�g(之所以要使用FAR�q�行��单的�~�辑�Q�也是因为非API的TOC部分需要根据情况自�׃��Ҏ��增减)�?/p>

上图是我是用�q�个工具生成的Eclipse 3.5的chm文档�?br />
其实�q�个�q�程很简单，我们只需要构造自��q��文档解析器，�q�按照hhp、hhc和hhk格式规范生成相应的文件就行了。其中文档解析器我��用了Java的正则表辑ּ�来解析，其解析式的核心如下：

1 public static final String _INDEX_PATTERN = "
"([\\p{Graph}|\\p{Blank}]*?)\"(\\p{Space}\\p{Alpha}+?=\".*?\")?+>(.*?)(.*?)\\p{Space}-";
2     public static final String _CONTEXT_PATTERN = ""((\\p{Graph}*?)#(\\p{Graph}*?))\">(.*?)(.*?)" ;
3     public static final String _TITLE_PATTERN = "(.*?)";

其中�W�一行是索引文�g条目的表辑ּ��Q�这里我是��用了index-files来生成烦引的�Q�当然在没有index-files的时候是使用TOC解析出来的条目构建�?br /> �W�二行是TOC条目的表辑ּ��Q�第三行是提取文件title时��用的表达式�?br /> 当然�q�里表达式是有缺��L��Q�比如不能解析不严格的HTML标签�{�等�Q�不�q�对于我自己而言已经��_��应付�l�大多数Javadoc了�?br />

Feenn 2010-01-12 14:22 发表评论