用GDI+转换图形格式

王朝other·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

//用GDI+转换图形格式

#include "afxdtctl.h"

#ifndef ULONG_PTR

#define ULONG_PTR unsigned long*

#include "GdiPlus.h"

using namespace Gdiplus;

#pragma comment(lib, "gdiplus.lib")

#endif

INT GetEncoderClsid(const WCHAR* format, CLSID* pClsid); // helper function

INT main()

{

// Initialize GDI+.

GdiplusStartupInput gdiplusStartupInput;

ULONG_PTR gdiplusToken;

GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

CLSID encoderClsid;

Status stat;

//Image* image = new Image(L"C:\\Test.jpg"); //这句在 MFC下报错

Image* image = NULL;

image = Bitmap::FromFile(L"C:\\Test.jpg", TRUE);

// Get the CLSID of the PNG encoder.

GetEncoderClsid(L"image/bmp", &encoderClsid);

stat = image->Save(L"C:\\Test.bmp", &encoderClsid, NULL);

if(stat == Ok)

printf("Bird.png was saved successfully\n");

else

printf("Failure: stat = %d\n", stat);

delete image;

GdiplusShutdown(gdiplusToken);

return 0;

}

INT GetEncoderClsid(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;

free(pImageCodecInfo);

return j; // Success

}

}

free(pImageCodecInfo);

return -1; // Failure

}

//另

image/bmp

image/jpeg

image/gif

image/tiff

image/png

需要下载相应的GDI+库等,建议将VC SDK升级到最新

升级地址:

http://www.microsoft.com/msdownload/platformsdk/sdkupdate/

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
 
 
© 2005- 王朝網路 版權所有 導航