Member Avatar for shizu

Hi All..

I using VC++ 6.0..with windows XP..
I have bmp image which I would like convert it save as jpeg format..

can anyone teach me the steps..??

Thank you..
Shizu..

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  • Latest Post Latest Post by mrnutty
Member Avatar for luce

Easiest solution is GDI+:

http://msdn.microsoft.com/en-us/library/ms534462%28v=VS.85%29.aspx

Load your bmp file into an 'Image' object then save it using the appropriate encoder:

VOID Example_SaveFile()
{
   // Create an Image object based on a PNG file.
   Image  image(L"Mosaic.bmp");

   // Save the image.
   CLSID jpgClsid;
   GetEncoderClsid(L"image/jpeg", &jpgClsid);
   image.Save(L"Mosaic2.jpg", &jpgClsid, NULL);
}
Edited by luce because: n/a
Member Avatar for shizu

Hi luce..

I try your code already..
once compile I get error message like below show..

******************************************************************
error C2065: 'Image' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'image'
error C2065: 'image' : undeclared identifier
error C2065: 'GetEncoderClsid' : undeclared identifier
error C2228: left of '.Save' must have class/struct/union type
******************************************************************
Please help..

am I need to include any header..??

Member Avatar for Red Goose

Hi luce..

I try your code already..
once compile I get error message like below show..

******************************************************************
error C2065: 'Image' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'image'
error C2065: 'image' : undeclared identifier
error C2065: 'GetEncoderClsid' : undeclared identifier
error C2228: left of '.Save' must have class/struct/union type
******************************************************************
Please help..

am I need to include any header..??

He wasn't writing your code for you, he was giving an example of how to implement the functionality. No one will do your code for you, as stated here.

As stated, you would need to open the image file and output with the proper encoding. Here is an article of MDSN on how to do it as well. A lot of options are available to you.

Edited by Red Goose because: n/a
Member Avatar for shizu

Hi Red Goose..

I understand the rules..
I know that Luce only give me sample..

my question is I don't understand why I will have
error C2065: 'GetEncoderClsid' : undeclared identifier

am I missing something that need to include..??

Thank you..
shizu..

Member Avatar for luce

Shizu,

#include <Gdiplus.h>
using namespace Gdiplus;

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

And you'd need to initalize GDI+ before you can use it...

For further info check the documentation on MSDN (sent the link in my previous post)

Edited by luce because: n/a
Member Avatar for shizu

Hi Luce..

Once I include <Gdiplus.h> without add in any code yet, after compile have error message that fail to locate

************************************************************************************
fatal error C1083: Cannot open include file: 'Gdiplus.h': No such file or directory
************************************************************************************

Am I need to install any SDK then I able to use this GDI+..??

Please advise..

Thank you..
shizu..

Member Avatar for ivanx_wu

I agreed with Luce. It's the simplest way to convert a image to jpeg format.

If you need more advanced format converting, find some open sources jpeg convert, it would be very helpful.

Member Avatar for mrnutty

Take the BMP image, copy it into paint. Then save it as JPEG

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