那位大侠知道如何将HBITMAP保存成为JPG或GIF文件？（CODEGURU中的代码有问题，用不了）300分相送。

[whitecell]

那位大侠知道如何将HBITMAP保存成为JPG或GIF文件？（CODEGURU中的代码有问题，用不了）300分相送。

[whitecell]

up

[ytweiwei]

用GDI+吧，他可以对jpg或gif文件有很好的支持，具体使用你可以参见《VC.NET开发实战》一书

[ytweiwei]

如果你机器装有VC7.0，我这里有你需要的全部代码，给我写信 [e-mail]，我回复给你

[whitecell]

ytweiwei(最近正在学VB)多谢了，可是其他部分我都是用MFC写的啊。改不了。

[xuying]

用intel jpeg library。

[蒋晟]

use GDI+

[康斯坦汀]

一个类叫CImage,codeguru或codeproject有.它可以做到.

[lshadow]

GDI+
其实不懂,跟着别人的,帮你up

[lshadow]

GDI+
其实不懂,跟着别人的,帮你up

[papaya_stone]

http://www.copathway.com/vchelp/type.asp?class_id=1&type_id=18
例子：JPEG文件编码（把bitmap 格式压缩成JPEG格式）

[zygapi]

可以用GDI+,或者去codeproject上下载一个CXImage库,但是这个比较大.其实有很多的库.你可留意一下.

[wyalchemy]

up

[superdreamer]

我有一个DLL，可以操作很多图形，是邓征波写的。要的话请发MAIL：
[e-mail]

[red_wolf]

用photoshop试一下看……

[masterz]

#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*);

int main()
{
CLSID codecClsid;
EncoderParameters encoderParameters;
long quality;
Status stat;

// Get an image from the disk.
Image image(L"Shapes.bmp");

// Get the CLSID of the JPEG codec.
GetCodecClsid(L"image/jpeg", &codecClsid);

// Before we call Image::Save, we must initialize an
// EncoderParameters object. The EncoderParameters object
// has an array of EncoderParameter objects. In this
// case, there is only one EncoderParameter object in the array.
// The one EncoderParameter object has an array of values.
// In this case, there is only one value (of type LONG)
// in the array. We will set this value to 0, 50, and 100.

encoderParameters.Count = 1;
encoderParameters.Parameter[0].Guid = EncoderQuality;
encoderParameters.Parameter[0].Type = EncoderParameterValueTypeLong;
encoderParameters.Parameter[0].NumberOfValues = 1;

// Save the image as a JPEG with quality level 0.
quality = 0;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes001.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes001.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes001.jpg");

// Save the image as a JPEG with quality level 50.
quality = 50;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes050.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes050.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes050.jpg");

// Save the image as a JPEG with quality level 100.
quality = 100;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes100.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes100.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes100.jpg");

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(int j = 0; j < num; ++j)
{
if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
{
*pClsid = pImageCodecInfo[j].Clsid;
return j; // Success
}
} // for

return -1; // Failure

} // GetCodecClsid

[whitecell]

多谢 masterz() 的代码，可是那些头文件和里面的函数体都在那里啊？

[duankuanjun]

http://www.microsoft.com/downloads/release.asp?releaseid=32738
这里有GDI+的下载！