在main函数中调用如下：
int main()
{
CConsoleProcess *pProgress = new CConsoleProcess();
bool f = CreatePyramids(strArg[2].c_str(), pProgress);
}
该部分为CreatePyramid.cpp CreatePyramid.h在下面
#include "CreatePyramid.h"
#include "gdal_priv.h"
#define TOPOVR_SIZE 256
bool CreatePyramids(const char* pszFileName, CProcessBase *pProgress)
{
if (pProgress != NULL)
{
pProgress->SetMessage("Create Pyramid:");
}
GDALAllRegister();
CPLSetConfigOption("USE_OVR", "YES"); //Create OVE format file
/* -------------------------------------------------------------------- */
/* Open data file. */
/* -------------------------------------------------------------------- */
GDALDatasetH hDataset;
hDataset = GDALOpen(pszFileName, GA_ReadOnly);
GDALDriverH hDriver = GDALGetDatasetDriver(hDataset);
const char* pszDriver = GDALGetDriverShortName(hDriver);
if (EQUAL(pszDriver, "HFA") || EQUAL(pszDriver, "PCIDSK"))
{
GDALClose(hDataset); //If th file is Erdas'img or PCI's pix format，create inline ovr，else create outside ovr
hDataset = GDALOpen(pszFileName, GA_Update);
}
if (hDataset == NULL)
{
if (pProgress != NULL)
pProgress->SetMessage("Open the image failed!!!Please Check the image!!!");
return false;
}
/* -------------------------------------------------------------------- */
/* Get File basic infomation */
/* -------------------------------------------------------------------- */
int iWidth = GDALGetRasterXSize(hDataset);
int iHeigh = GDALGetRasterYSize(hDataset);
int iPixelNum = iWidth * iHeigh; //The numble of the total pixel'numble
int iTopNum = TOPOVR_SIZE*TOPOVR_SIZE; //The top Pyramid's size，256*256
int iCurNum = iPixelNum / 4;
int anLevels[1024] = { 0 };
int nLevelCount = 0; //level of Pyramid
do //Compute the level of Pyramid
{
anLevels[nLevelCount] = static_cast<int>(pow(2.0, nLevelCount + 2));
nLevelCount++;
iCurNum /= 4;
} while (iCurNum > iTopNum);
const char *pszResampling = "GAUSS"; //The method of resample
GDALProgressFunc pfnProgress = GDALTermProgress;//The rate of processing
/* -------------------------------------------------------------------- */
/* Generate overviews. */
/* -------------------------------------------------------------------- */
if (nLevelCount > 0 &&
GDALBuildOverviews(hDataset, pszResampling, nLevelCount, anLevels,
0, NULL, pfnProgress, pProgress) != CE_None)
{
if (pProgress != NULL)
return true;
}
/* -------------------------------------------------------------------- */
/* Cleanup */
/* -------------------------------------------------------------------- */
GDALClose(hDataset);
GDALDestroyDriverManager();
if (pProgress != NULL)
pProgress->SetMessage("Create Pyramid Successed！");
return true;
}
CreatePyramid.h文件在此
#include <string>
#include <Windows.h>
#include "algorithm"
using namespace std;
class CProcessBase
{
public:
/**
* @brief 构造函数
*/
CProcessBase()
{
m_dPosition = 0.0;
m_iStepCount = 100;
m_iCurStep = 0;
m_bIsContinue = true;
}
/**
* @brief 析构函数
*/
virtual ~CProcessBase() {}
/**
* @brief 设置进度信息
* @param pszMsg 进度信息
*/
virtual void SetMessage(const char* pszMsg) = 0;
/**
* @brief 设置进度值
* @param dPosition 进度值
* @return 返回是否取消的状态，true为不取消，false为取消
*/
virtual bool SetPosition(double dPosition) = 0;
/**
* @brief 进度条前进一步，返回true表示继续，false表示取消
* @return 返回是否取消的状态，true为不取消，false为取消
*/
virtual bool StepIt() = 0;
/**
* @brief 设置进度个数
* @param iStepCount 进度个数
*/
virtual void SetStepCount(int iStepCount)
{
ReSetProcess();
m_iStepCount = iStepCount;
}
/**
* @brief 获取进度信息
* @return 返回当前进度信息
*/
string GetMessage()
{
return m_strMessage;
}
/**
* @brief 获取进度值
* @return 返回当前进度值
*/
double GetPosition()
{
return m_dPosition;
}
/**
* @brief 重置进度条
*/
void ReSetProcess()
{
m_dPosition = 0.0;
m_iStepCount = 100;
m_iCurStep = 0;
m_bIsContinue = true;
}
/*! 进度信息 */
string m_strMessage;
/*! 进度值 */
double m_dPosition;
/*! 进度个数 */
int m_iStepCount;
/*! 进度当前个数 */
int m_iCurStep;
/*! 是否取消，值为false时表示计算取消 */
bool m_bIsContinue;
};
/**
* @brief 控制台进度条类
*
* 提供控制台程序的进度条类接口，来反映当前算法的进度值
*/
class CConsoleProcess : public CProcessBase
{
public:
/**
* @brief 构造函数
*/
CConsoleProcess()
{
m_dPosition = 0.0;
m_iStepCount = 100;
m_iCurStep = 0;
};
/**
* @brief 析构函数
*/
~CConsoleProcess()
{
//remove(m_pszFile);
};
/**
* @brief 设置进度信息
* @param pszMsg 进度信息
*/
void SetMessage(const char* pszMsg)
{
m_strMessage = pszMsg;
printf("%s\n", pszMsg);
}
/**
* @brief 设置进度值
* @param dPosition 进度值
* @return 返回是否取消的状态，true为不取消，false为取消
*/
bool SetPosition(double dPosition)
{
m_dPosition = dPosition;
TermProgress(m_dPosition);
m_bIsContinue = true;
return true;
}
/**
* @brief 进度条前进一步
* @return 返回是否取消的状态，true为不取消，false为取消
*/
bool StepIt()
{
m_iCurStep++;
m_dPosition = m_iCurStep*1.0 / m_iStepCount;
TermProgress(m_dPosition);
m_bIsContinue = true;
return true;
}
private:
void TermProgress(double dfComplete)
{
static int nLastTick = -1;
int nThisTick = (int)(dfComplete * 40.0);
nThisTick = min(40, max(0, nThisTick));
// Have we started a new progress run?
if (nThisTick < nLastTick && nLastTick >= 39)
nLastTick = -1;
if (nThisTick <= nLastTick)
return;
while (nThisTick > nLastTick)
{
nLastTick++;
if (nLastTick % 4 == 0)
fprintf(stdout, "%d", (nLastTick / 4) * 10);
else
fprintf(stdout, ".");
}
if (nThisTick == 40)
fprintf(stdout, " - done.\n");
else
fflush(stdout);
}
};
bool CreatePyramids(const char* pszFileName, CProcessBase *pProgress);