C++博客-chenjt3533

从Graphics 中获取Bitmap图像

chenjt3533 — Fri, 12 Sep 2014 08:36:00 GMT

CDC dcTmp;

HDC hDc= graph.GetHDC(); /// <会被加锁>

dcTmp.Attach(hDc);

CBitmap *pBmp = dcTmp.GetCurrentBitmap();

HBITMAP hBITMAP = (HBITMAP)pBmp->GetSafeHandle();

Bitmap bitmap(hBITMAP, 0);

dcTmp.Detach(); /// <释放>

graph.ReleaseHDC(hDc); /// <解锁>

chenjt3533 2014-09-12 16:36 发表评论

笔记

chenjt3533 — Fri, 05 Sep 2014 03:30:00 GMT

获取系统版本 http://dreamisx.blog.163.com/blog/static/1150048392012898257606/ http://cool.worm.blog.163.com/blog/static/64339006200911903953953/

修改文件属性
String strFileName="";

// 1 .
CFileStatus fs;

CFile::GetStatus(strFileName,fs);

fs.m_attribute = CFile::hidden; //set hidden attribute

CFile::SetStatus(strFileName,fs);　
// 2.
GetFileAttributes(strFileName.c_str())

SetFileAttributes(strFile.c_str(), fileinfo.attrib);

std::wstring CDigitalClockEffector::GetUnit(bool bShow, bool bAM, int nType)

{

std::wstring wstrUnit = L"";

if (bShow)

{

switch(nType)

{

case e_time_type_hh_mm_ss:

case e_time_type_hh_mm:

wstrUnit = bAM ? L"AM" : L"PM";

break;

case e_time_type_hh_s_mm_s_ss_s:

case e_time_type_hh_s_mm_s:

wstrUnit = bAM ? L"上午" : L"下午";

break;

default:

break;

}

return wstrUnit;

}

chenjt3533 2014-09-05 11:30 发表评论

笔记文本走马灯特效

chenjt3533 — Mon, 01 Sep 2014 03:49:00 GMT

SizeF stringSize, strSize(1000,1000);

    if (m_bStatic)
    {
        /// <静止，居中>
        fmt.SetAlignment(StringAlignmentCenter);
        fmt.SetLineAlignment(StringAlignmentCenter);

        graph.MeasureString(m_wstrText.c_str(), m_wstrText.length(), &font, strSize, &fmt, &stringSize);

        RectF rectf(m_rect.GetLeft(), m_rect.GetTop(), m_rect.Width, min(m_rect.Height, stringSize.Height));
        DrawString(graph, m_wstrText, font, solidBrush, rectf, fmt);
    }
    else
    {
        /// <左移，左对齐>
        fmt.SetAlignment(StringAlignmentNear);
        fmt.SetLineAlignment(StringAlignmentNear);

        /// <测量输出字符串所需要的矩形空间>
        std::wstring wstr = m_wstrText;
        graph.MeasureString(wstr.c_str(), wstr.length(), &font, strSize, &fmt, &stringSize);

        double fProgress = m_timeInfo.GetProgress();
        //REAL fOffsetX = max(m_rect.Width, stringSize.Width) * fProgress;
        REAL fOffsetX = (stringSize.Width + m_rect.Width) * fProgress;
        REAL fDiffx = fOffsetX - m_rect.Width;

        if (fDiffx > 0.000001)
        {
            int nLength = 1;
            std::wstring wstrTmp = L"";
            do
            {
                wstrTmp = wstr.substr(0, nLength++);
                graph.MeasureString(wstrTmp.c_str(), wstrTmp.length(), &font, strSize, &fmt, &stringSize);
            }while(stringSize.Width < abs(fDiffx));

            --nLength;
            wstr = wstr.substr(nLength, wstr.length() - nLength);
        }

        graph.MeasureString(L"1", 2, &font, strSize, &fmt, &stringSize);

        fOffsetX = max(m_rect.GetLeft(), m_rect.GetRight() - fOffsetX);
        RectF rect(fOffsetX, m_rect.GetTop(), min(m_rect.Width, max(1, m_rect.GetRight() - fOffsetX)), min(m_rect.Height, stringSize.Height));
        DrawString(graph, wstr, font, solidBrush, rect, fmt);
    }

chenjt3533 2014-09-01 11:49 发表评论

获取农历年、时辰

chenjt3533 — Tue, 26 Aug 2014 15:28:00 GMT

void CCalendar::FormatLunarYear(WORD iYear, char* pBuffer)
{
    char szText1[] = "甲乙丙丁戊己庚辛壬癸";
    char szText2[] = "子丑寅卯辰巳午未申酉戌亥";
    char szText3[] = "鼠牛虎免龙蛇马羊猴鸡狗猪";

    memcpy(pBuffer,   szText1+((iYear-4)%10)*2, 2);
    memcpy(pBuffer+2, szText2+((iYear-4)%12)*2, 2);
    pBuffer[4]=' ';
    memcpy(pBuffer+5, szText3+((iYear-4)%12)*2, 2);
    strcpy(pBuffer+7, "年");
}

void CCalendar::FormatLunarHour(WORD iHour, char *pBuffer)
{
    char szText[] = "子丑寅卯辰巳午未申酉戌亥";
    int nIndex = (iHour + 1) / 2;
    if (12 == nIndex && 23 == iHour)
    {
        nIndex = 0;
    }
    memcpy(pBuffer, szText+nIndex*2, 2);
    strcpy(pBuffer+2, "时");
}

chenjt3533 2014-08-26 23:28 发表评论

ffplay 将视频帧转换成bmp图片

chenjt3533 — Thu, 21 Aug 2014 14:21:00 GMT

static int video_thread2(void *arg)
{
    AVPacket pkt = { 0 };
    VideoState *is = (VideoState *)arg;
    AVFrame *pFrame = avcodec_alloc_frame();
    int64_t pts_int = AV_NOPTS_VALUE, pos = -1;
    double pts;
    int ret;

    for (;;)
    {
        while (is->paused && !is->videoq.abort_request)
            SDL_Delay(10);

        avcodec_get_frame_defaults(pFrame);
        av_free_packet(&pkt);

        ret = get_video_frame(is, pFrame, &pts_int, &pkt);
        if (ret < 0)
            goto the_end;

        if (!ret)
            continue;

        pts = pts_int * av_q2d(is->video_st->time_base);
        ret = queue_picture(is, pFrame, pts, pkt.pos);

        if (ret < 0)
            goto the_end;

        if (is->step)
            stream_toggle_pause(is);

        int nWidth = pFrame->width;
        int nHeight = pFrame->height;
        AVPixelFormat srcfmt = (AVPixelFormat)pFrame->format;
        AVPixelFormat dstfmt = AV_PIX_FMT_BGR24;//AV_PIX_FMT_RGB24;//AV_PIX_FMT_BGR24;
        AVFrame *pFrameRGB;
        pFrameRGB = avcodec_alloc_frame();

//         int src_bytes_num = avpicture_get_size(srcfmt, nWidth, nHeight);
//         uint8_t* src_buff = (uint8_t*)av_malloc(src_bytes_num);
//         avpicture_fill((AVPicture*)pFrame, src_buff, srcfmt, nWidth, nHeight);

        int dst_bytes_num = avpicture_get_size(dstfmt, nWidth, nHeight);
        uint8_t* dst_buff = (uint8_t*)av_malloc(dst_bytes_num);
        avpicture_fill((AVPicture*)pFrameRGB, dst_buff, dstfmt, nWidth, nHeight);

        SwsContext* pSwsCtx = sws_getContext(nWidth, nHeight,
            srcfmt,
            nWidth, nHeight,
            dstfmt,
            SWS_BICUBIC,
            NULL,NULL,NULL);

        /// <转换图像格式>
        sws_scale(pSwsCtx, pFrame->data, pFrame->linesize, 0, nHeight, pFrameRGB->data, pFrameRGB->linesize);

        static int nnn = 0;

        if ((nnn++ % 5) == 0)
        {
            //saveAsBitmap(pFrameRGB, nWidth, nHeight, nnn);
        }
    }

the_end:
    avcodec_flush_buffers(is->video_st->codec);
    av_free_packet(&pkt);
    avcodec_free_frame(&pFrame);
    return 0;
}

bool saveAsBitmap(AVFrame *pFrameRGB, int width, int height, int iFrame)
{
    if (NULL == pFrameRGB->data[0])
    {
        return false;
    }

    FILE *pFile = NULL;
    BITMAPFILEHEADER bmpheader;
    BITMAPINFO bmpinfo;

    char fileName[32];
    int bpp = 24;

    // open file
    sprintf(fileName, "./images/frame%d.bmp", iFrame);
    pFile = fopen(fileName, "wb");
    if (!pFile)
        return false;

    bmpheader.bfType = ('M' <<8)|'B';
    bmpheader.bfReserved1 = 0;
    bmpheader.bfReserved2 = 0;
    bmpheader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
    bmpheader.bfSize = bmpheader.bfOffBits + width*height*bpp/8;

    bmpinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmpinfo.bmiHeader.biWidth = width;
    bmpinfo.bmiHeader.biHeight = -height; //reverse the image
    bmpinfo.bmiHeader.biPlanes = 1;
    bmpinfo.bmiHeader.biBitCount = bpp;
    bmpinfo.bmiHeader.biCompression = BI_RGB;
    bmpinfo.bmiHeader.biSizeImage = 0;
    bmpinfo.bmiHeader.biXPelsPerMeter = 100;
    bmpinfo.bmiHeader.biYPelsPerMeter = 100;
    bmpinfo.bmiHeader.biClrUsed = 0;
    bmpinfo.bmiHeader.biClrImportant = 0;

    fwrite(&bmpheader, sizeof(BITMAPFILEHEADER), 1, pFile);
    fwrite(&bmpinfo.bmiHeader, sizeof(BITMAPINFOHEADER), 1, pFile);
     uint8_t *buffer = pFrameRGB->data[0];
//     for (int h=0; h//     {
//         for (int w=0; w//         {
//             fwrite(buffer+2, 1, 1, pFile);
//             fwrite(buffer+1, 1, 1, pFile);
//             fwrite(buffer, 1, 1, pFile);
//
//             buffer += 3;
//         }
//     }

    fwrite(buffer,width*height*bpp/8,1,pFile);

    fclose(pFile);

    return true;
}

chenjt3533 2014-08-21 22:21 发表评论

实现对话框透明

chenjt3533 — Sun, 11 May 2014 01:54:00 GMT

继承CDialogEx,并在 OnInitDialog() 添加一下代码

SetBackgroundColor(#010b15); 
LONG ExtendedStyle = GetWindowLong(GetSafeHwnd(),GWL_EXSTYLE ); 
SetWindowLong(GetSafeHwnd(),GWL_EXSTYLE,ExtendedStyle | WS_EX_LAYERED ); 
::SetLayeredWindowAttributes(GetSafeHwnd(),#010b15,0,LWA_COLORKEY);

chenjt3533 2014-05-11 09:54 发表评论

c++ 汉字转换成拼音

chenjt3533 — Fri, 31 May 2013 08:53:00 GMT

首先有必要说下机内码与区位：

机内码高位字节=(区号)H+A0H
机内码低位字节=(位号)H+A0H

例子：
string str = "陈"; // 机内码存储，占两个字节
unsigned char ucHigh = (unsigned char)strText[0]; // 获取机内码高字节 ucHigh = 179
unsigned char ucLow = (unsigned char)strText[1]; // 获取机内码低字节 ucLow = 194
unsigned int uCode = (ucHigh - 0xA0) * 100 + ucLow - 0xA0; // 区位码 uCode = (179 - 160) * 100 + 194 - 160 = 1934;
接下来就是根据区位码 1934 找到对应的拼音，怎么找呢？看源码吧。

源码下载 http://pan.baidu.com/share/link?shareid=483963&uk=1812123514

chenjt3533 2013-05-31 16:53 发表评论

c++ 获取汉字首字母

chenjt3533 — Fri, 31 May 2013 05:01:00 GMT

#include <iostream>
#include <string>
using namespace std;

#define CONVERT(start, end, code, letter) if(code >= start && code <= end) return letter

char Convert(wchar_t n)
{
    /// 根据汉字区域码获取拼音声母
    CONVERT(0xB0A1, 0xB0C4, n, 'a');
    CONVERT(0XB0C5, 0XB2C0, n, 'b');
    CONVERT(0xB2C1, 0xB4ED, n, 'c');
    CONVERT(0xB4EE, 0xB6E9, n, 'd');
    CONVERT(0xB6EA, 0xB7A1, n, 'e');
    CONVERT(0xB7A2, 0xB8c0, n, 'f');
    CONVERT(0xB8C1, 0xB9FD, n, 'g');
    CONVERT(0xB9FE, 0xBBF6, n, 'h');
    CONVERT(0xBBF7, 0xBFA5, n, 'j');
    CONVERT(0xBFA6, 0xC0AB, n, 'k');
    CONVERT(0xC0AC, 0xC2E7, n, 'l');
    CONVERT(0xC2E8, 0xC4C2, n, 'm');
    CONVERT(0xC4C3, 0xC5B5, n, 'n');
    CONVERT(0xC5B6, 0xC5BD, n, 'o');
    CONVERT(0xC5BE, 0xC6D9, n, 'p');
    CONVERT(0xC6DA, 0xC8BA, n, 'q');
    CONVERT(0xC8BB, 0xC8F5, n, 'r');
    CONVERT(0xC8F6, 0xCBF0, n, 's');
    CONVERT(0xCBFA, 0xCDD9, n, 't');
    CONVERT(0xCDDA, 0xCEF3, n, 'w');
    CONVERT(0xCEF4, 0xD188, n, 'x');
    CONVERT(0xD1B9, 0xD4D0, n, 'y');
    CONVERT(0xD4D1, 0xD7F9, n, 'z');
    return '\0';
}

void Test_Invert()
{
    string sChinese = "根据汉字区域码获取汉字首字母"; // 输入汉字

    wchar_t wchr = 0;
    int nCount = sChinese.length() / 2;
    char* buff = new char[nCount];
    memset(buff, 0x00, sizeof(char)*nCount+1);

    for (int i = 0, j = 0; i < nCount; ++i)
    {
        wchr = (sChinese[j++] & 0xff) << 8; // 高字节
        wchr |= (sChinese[j++] & 0xff);        // 低字节
        buff[i] = Convert(wchr);
    }

    cout << "pin yin = [ " << buff << " ]" << endl;
}

chenjt3533 2013-05-31 13:01 发表评论

《c Templates 》笔记

chenjt3533 — Thu, 30 May 2013 07:36:00 GMT

1、Function Templates(函数模版)

例：
tempalte
T GetMax(T a, T b)
{
return a < b ? b : a;
}

/// 重载
tempalte
T GetMax(T a, T b, T c)
{
return (c < GetMax(a, b) ? GetMax(a, b) : c);
}

/// 默认类型
template
T GetMax(T a, T b)
{
retrun a < b ? b : a;
}

2、Class Templates(类模版)
例：
template
class MyStack
{
friend class CFriend1; // 普通友元类不需要先申明
friend class CFriend2; // error, 友元模板类必须先申明

public:
  void Push(T const&);
  void Pop();
  T Top() const;
  bool Empty() const;
private:
  std::vector elems;
};

void MyStack::Push(T const& e)
{
elems.push_back(e);
}

/// 继承
template
class Derived : public MyStack
{
public:
void Test()
{
Top(); // 应该使用this->Top() 或 MyStack::Top(), 否则就调用外部Top()，或者编译错误
}

/// 成员模版函数，不能是virtual
template
void Test2()
{

}
};

3、NonType Templates(非类型模版参数)
局限性：通常只能是常数整数(包括enum)和指向局部变量的指针。
例:
template
struct NonTypeStruct
{
T elems[MAXSIZE];
};

4、typename 关键字
typename是在C++标准化工程中被引入的，目的是向编译器说明template内部的某个表示符号是个类型。
例：
template
struct MyStruct
{
typename T::SubType* m_Ptr; // 表示m_Ptr是指向SubType是T内部类型的一个指针，若没有typename，就表

示T的静态变量SubType乘以m_Ptr。
};

5、双重模版参数
例：
template class CT>
class DoubleTemplate
{
CT m_ct;
};
DoubleTemplate dbTemplate; // 类中定义了一个vector的成员属性m_ct;

6、模板的申明和定义必须在同一个文档中，否则会出现连接错误
例：
// Test.h
template
T Max(T a);

// Test.cpp
template
T Max(T a) { return a; }

// Main.cpp
#include "Test.h"

void main()
{
int a = Max(1); // error LNK2019，除非同时 #inclde "test.cpp"
}

7、模版类不能和其它不同类型的实体同名。
例：
int c;
class c; // ok，普通类可以
template
class c; // error，模板类不行

8、在类中声明友元模版类
例：
class Manager
{
template
friend class Task;
};

9、看看小细节
例：
template
class Invert
{
public:
static bool const result = !b;
};
bool bTest = Invert<(1>0)>::result; // (1>0)小括号必须存在

std::vector > vectList; // >空格必须存在

chenjt3533 2013-05-30 15:36 发表评论

C++模板简单分析与举例

chenjt3533 — Sat, 30 Mar 2013 06:23:00 GMT

摘要: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->#pragma once#include /**//*/////////////////////////////////////////////&nbs... 阅读全文

chenjt3533 2013-03-30 14:23 发表评论

C++博客-chenjt3533

从Graphics 中获取Bitmap图像

笔记

笔记 文本走马灯特效

获取农历年、时辰

ffplay 将视频帧转换成bmp图片

实现对话框透明

c++ 汉字转换成拼音

c++ 获取汉字首字母

《c Templates 》笔记

C++模板简单分析与举例

笔记文本走马灯特效