VC中使用Gdi+合并jpg圖片
發(fā)表時(shí)間:2024-02-19 來源:明輝站整理相關(guān)軟件相關(guān)文章人氣:
[摘要]合并兩張jpg圖片為一張jpg圖片,思路是先把兩張圖片jpg圖片都轉(zhuǎn)化成bmp圖片,然后把兩張bmp圖片合并成一張bmp圖片,然后是把這張bmp圖片轉(zhuǎn)化為jpg圖片。一。jpg,bmp互相轉(zhuǎn)化/*********************************format:bmp轉(zhuǎn)為jpg, fo...
合并兩張jpg圖片為一張jpg圖片,思路是先把兩張圖片jpg圖片都轉(zhuǎn)化成bmp圖片,然后把兩張bmp圖片合并成一張bmp圖片,然后是把這張bmp圖片轉(zhuǎn)化為jpg圖片。
一。jpg,bmp互相轉(zhuǎn)化
/*********************************
format:bmp轉(zhuǎn)為jpg, format為image/jpeg,jpg轉(zhuǎn)為bmp,format為image/bmp
strDst為最終轉(zhuǎn)化結(jié)果的圖片路徑
strSrc為原來圖片的路徑
**********************************/
BOOL ConvertPic(const WCHAR *format, const CString &strDst, const CString &strSrc)
{
BOOL bConvert = false;
CLSID clsid;
int nRet = 0;
nRet = GetEncoderClsid(format,&clsid); //得到CLSID
USES_CONVERSION;
if (nRet>=0)
{
Image image(A2W(strSrc));
image.Save(A2W(strDst),&clsid,NULL);
bConvert = true;
}
return bConvert;
}
其中GetEncoderClsid函數(shù)如下:
/*****************************************************
返回值為-1表示失敗,其他為成功
******************************************************/
int GetEncoderClsid(const WCHAR *format, CLSID *pClsid)
{
int nRet = -1;
ImageCodecInfo * pCodecInfo = NULL;
UINT nNum = 0,nSize = 0;
GetImageEncodersSize(&nNum,&nSize);
if (nSize<0)
{
return nRet;
}
pCodecInfo = new ImageCodecInfo[nSize];
if (pCodecInfo==NULL)
{
return nRet;
}
GetImageEncoders(nNum,nSize,pCodecInfo);
for (UINT i=0; i<nNum; i++)
{
if (wcscmp(pCodecInfo[i].MimeType,format)==0)
{
*pClsid = pCodecInfo[i].Clsid;
nRet = i;
delete[] pCodecInfo;
return nRet;
}
else
{
continue;
}
}
delete[] pCodecInfo;
return nRet;
}
bmp轉(zhuǎn)化為jpg
ConvertPic(L"image/jpeg","c:\\1.jpg","c:\\1.bmp")
jpg轉(zhuǎn)化為bmp
ConvertPic(L"image/bmp","c:\\1.bmp","c:\\1.jpg")
二。bmp圖片合并
BOOL CombinePic(const WCHAR *format, const CString &strDst, const CString &strPic1, \
const CString &strPic2)
{
BOOL bCombine = false;
int nRet = 0;
CLSID clsid;
nRet = GetEncoderClsid(format,&clsid);
if (nRet>=0)
{
USES_CONVERSION;
Bitmap bmp1(A2W(strPic1));
Bitmap bmp2(A2W(strPic2));
int nWidth = 0, nHeight = 0;
nWidth = bmp1.GetWidth(); //假設(shè)兩圖片大小同
nHeight = bmp1.GetHeight();
Bitmap bmpCombine(2*nWidth,nHeight); //高不變,寬*2,水平合并
Graphics * pG = NULL;
pG = Graphics::FromImage(&bmpCombine);
if (pG!=NULL)
{
pG->DrawImage(&bmp1,0,0);
pG->DrawImage(&bmp2,nWidth,0);
bmpCombine.Save(A2W(strDst),&clsid,NULL);
}
}
return bCombine;
}
例子:
CombinePic(L"image/bmp","12.bmp","1.bmp","2.bmp");
有了上面的功能,其他的就沒問題了