Re: Source Code of a Simple Calculator - C / C++ / MFC Discussion Boards

AJ1238-Nov-01 21:37

8-Nov-01 21:37

Hi,

I am using GDI+ to convert a batch of TIFFS to JPEGS - i was just wondering how i can resize a image object and then save it out. Does it have to go via a 'graphics' object.

Because I can't see a convenient way to save the graphics object out to a jpeg after i have done my drawimage.

Cheers
Richard

Re: GDI+

Christian Graus8-Nov-01 22:04

Christian Graus

8-Nov-01 22:04

I answered this already. You build the graphics object using the Bitmap, then resize it and the bitmap will be resized.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: GDI+

AJ1239-Nov-01 3:07

AJ123

9-Nov-01 3:07

Thanks, did see your reply , though it didn't really help me much, i tend to find message that are posted a few pages back tend to get ignored . Had a look at your tutorial to.

I recognise i have to use the Graphics class, i wrote the following code to try and manipulate an image from a file, as a start basis.

//Source Image
Image* image = new Image(L"c:\\test.bmp");

Graphics* imageGraphics = Graphics::FromImage(image);

Pen* blackpen= new Pen(Color(0, 0, 0, 0), 10);

Point point1(0, 0);
Point point2(100, 300);

// Draw A line.
imageGraphics->DrawLine(blackpen, point1, point2);

imageGraphics->Flush(FlushIntentionSync);

// Get the CLSID of the JPG
if (GetEncoderClsid(L"image/jpeg", &encoderClsid) == -1)
MessageBox("No suitable encoder");

MessageBox("About to save");
stat = image->Save(L"c:\\conv.jpg", &encoderClsid, NULL);
MessageBox("Done");

if(stat != Ok)
{
//Have A Failure Log
char err[255];
wsprintf(err,"%d", stat);

MessageBox("Failure: stat = ");
}

delete blackpen;
delete imageGraphics;
delete image;

GdiplusShutdown(gdiplusToken);

Thanks Again, must start and try and hekp out on the forum myself!

Rich

Re: GDI+

AJ12310-Nov-01 4:28

AJ123

10-Nov-01 4:28

The reason the above code didn't draw a line on the saved image, was because of the encoder, if i was drawing on a jpeg and saving to a jpeg. It would of.

As for my image conversion routine. I ended up having to use a 'Bitmap' object in order to create a new image, this was done through passing the contructor a HBITMAP. Couldn't see how you could create a new image in GDI+ anyother way???

Cheers
Rich

Source Code of a Simple Calculator

8-Nov-01 18:51

Hi,
I am engaged in a project ,now I require some source
code of a simple( not scientific) calcutor to speed up
my process in this project.Who can help me?
You can send it to my Email ,fengrux@hotmail.com

regards.