So,

Using the image gallery widget and what not, I was pretty perturbed to see that there is no function to pass in a width/height AND respect aspect ratio, something that you basically need always.

The issue here is that not all images are 3:4, some are very tall, some very long, but i still need them to fit in my box both width and height wise.

Originally I thought I could write a function that would take the guid, and get me the height/width, I could do some math and return the desired 'maxsidesize' or what have you.. but there are no methods to do this without versionid and a datasource.

I eventually tracked down the CMSPages/getfile.aspx.cx code, it is called every time an image request is made, and has the resizing logic. Funnily enough they implemented an aspect ratio respecting method, but it doesn't get called ever..

So I created this method (which is no magic)
---
private void MaintainAspect(int pictureWidth, int pictureHeight)
{
if (this.Height == 0 || this.Width == 0)
{
this.SetRate(pictureWidth, pictureHeight);
return;
}
float desiredRatio = this.Width / this.Height; ;
float origRatio= (float)pictureWidth / (float)pictureHeight;


if (origRatio > desiredRatio)
{
//set height
this.Height = (int)(((float)this.Width) / origRatio);

}else{

this.Width = (int)(((float)this.Height) * origRatio);

}
}
-------------

Drop that into CMSPages/getfile.aspx.cx and call it inside the
'protected void ProcessFile(Guid attachmentGuid)'
method, put it right before this line
outputFile = new CMSOutputFile(atInfo, null);
which in my code is line 609. Essentially you set your 'this.height' and 'this.width' before it builds the output file, and it will resize the image.

//maintain aspect ratio
this.MaintainAspect(atInfo.AttachmentImageWidth, atInfo.AttachmentImageHeight);
//end ratio


Sorry about the lack of formatting, Hope that helps someone.