将其它格式的图形文件转换位bmp文件！
如何将其它格式的图形文件（jpeg,gif的主要的就行）转换位bmp文件，又没有现成的dll库之类，或者控件？ 问题点数：0、回复次数：6Top
1 楼masterz（www.fruitfruit.com）回复于 2003-08-01 18:38:14 得分 0
#include <Stdio.h>
#include <Objbase.h>
#include <Windows.h>
#include <Gdiplus.h>
#include <GdiPlusEnums.h>
using namespace Gdiplus;
#pragma comment(lib,"gdiplus")
// Helper functions
int GetCodecClsid(const WCHAR*, CLSID*);
HRESULT __fastcall AnsiToUnicode(LPCSTR pszA, LPOLESTR* ppszW)
{
ULONG cCharacters;
DWORD dwError;
if (NULL == pszA)
{
*ppszW = NULL;
return NOERROR;
}
cCharacters = strlen(pszA)+1;
*ppszW = (LPOLESTR) CoTaskMemAlloc(cCharacters*2);
if (NULL == *ppszW)
return E_OUTOFMEMORY;
if (0 == MultiByteToWideChar(CP_ACP, 0, pszA, cCharacters,*ppszW, cCharacters))
{
dwError = GetLastError();
CoTaskMemFree(*ppszW);
*ppszW = NULL;
return HRESULT_FROM_WIN32(dwError);
}
return NOERROR;
}
int main(int argc, char* argv[])
{
int n_ret=0;
printf("%s can convert jpg, png, gif, tiff to bmp file.\n if it works, it is written by masterz, otherwise I don't know who write it",argv[0]);
if(argc!=3)
{
printf("usage:%s bmp_filename source_image_filename\n",argv[0]);
return -1;
}
GdiplusStartupInput gdiplusStartupInput;
ULONG gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
{
CLSID codecClsid;
Status stat;
EncoderParameters encoderParameters;
GetCodecClsid(L"image/bmp", &codecClsid);
encoderParameters.Count = 0;
LPOLESTR bstr_src_img;
LPOLESTR bstr_dst_bmp;
AnsiToUnicode(argv[1],&bstr_dst_bmp);
AnsiToUnicode(argv[2],&bstr_src_img);
Image image(bstr_src_img);
stat =image.Save(bstr_dst_bmp, &codecClsid, &encoderParameters);
if(stat == Ok)
{
n_ret=0;
wprintf(L"%s saved successfully.\n",bstr_dst_bmp);
}
else
{
n_ret=-2;
wprintf(L"%d Attempt to save %s failed.\n", stat, bstr_dst_bmp);
}
CoTaskMemFree(bstr_dst_bmp);
CoTaskMemFree(bstr_src_img);
}
GdiplusShutdown(gdiplusToken);
return 0;
} // main
int GetCodecClsid(const WCHAR* format, CLSID* pClsid)
{
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes
ImageCodecInfo* pImageCodecInfo = NULL;
GetImageEncodersSize(&num, &size);
if(size == 0)
return -1; // Failure
pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo == NULL)
return -1; // Failure
GetImageEncoders(num, size, pImageCodecInfo);
for(UINT j = 0; j < num; ++j)
{
if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
{
*pClsid = pImageCodecInfo[j].Clsid;
return j; // Success
}
} // for
return -1; // Failure
} // GetCodecClsid
//in order to compile this program, you need to download microsoft platform sdk from http://www.microsoft.com/msdownload/platformsdk/sdkupdate/downlevel.htm
//also download gdiplus.dll and put it at the same directory as the executable.
//http://www.microsoft.com/downloads/release.asp?releaseid=32738
//Platform SDK Redistributable: GDI+ RTM
//sample usage: img2bmp a.bmp b.gif
Top
2 楼ahu9870（阿胡9870）回复于 2003-08-01 18:41:01 得分 0
显然有，
搜索一下。Top
3 楼cbz（cbz）回复于 2003-08-01 18:42:04 得分 0
如果是C++Builder的话，那倒是很方便了，vc+，看看各位的高见Top
4 楼lvsam（森）回复于 2003-08-04 10:02:57 得分 0
To masterz(MS MVP):
程序中的Gdiplus.h从那里得到呀？谢谢！！Top
5 楼houdy（致力于图像/图形领域，成为有思想的程序员）回复于 2003-08-04 12:11:52 得分 0
你可以使用GDI++,VC 7.0（也就是VS.Stdio)提供的。图像处理，图像转换的基本操作里面都包括了。
你也可是使用别人做好的类库。比如CxImage,FreeImage等。网上有很多的。
还有就是自己写（如果你够牛的话）。Top
6 楼DeautyFan（可可魔仙）回复于 2003-08-04 12:44:03 得分 0
搜索一下Top
