Re: Images and PDF:API2

--- In [email protected], "Mr. Shawn H. Corey" 
<shawnhcorey@...> wrote:
>
> spinningwebz2002 wrote:
> > Thanks for the tip. Do you know how the scale option works? Or 
maybe 
> > if I tell you want I want to happen you can give me some pointers
> > 
> > I want center an image and have the height be a particular size 
and 
> > the width be proportional to that. If it is possible I would like 
to 
> > crop the extra width if any, but I an always draw a white box 
over 
> > the extra width if need be. 
> 
> To calculate the scaling factor, you need to know how many pixels 
wide (or high) your image is and how wide, in points, you want the 
result.
> 
> Example 1: a 4x6 photo at 300 dpi.
> 
>   $image_width = 4 * 300;  # 4 inches at 300 dpi
>   $result_width = 4 * 72;  # 4 inches at 72 points per inch
>   $scale = $image_width / $result_width;
> 
> Example 2: a PNG of 1280 pixels wide to be shown sideways at 10 
inches wide.
> 
>   $image_width = 1280;
>   $result_width = 10 * 72;  # 10 inches at 72 points per inch
>   $scale = $image_width / $result_width;
> 
> Example 3: a 3x2 inch photo at 150dpi to be shown at twice its size
> 
>   $image_width = 3 * 150;  # 3 inches at 150 dpi
>   $result_width = 6 * 72;  # 6 inches at 72 points per inch
>   $scale = $image_width / $result_width;
> 
> 
> -- 
> Just my 0.00000002 million dollars worth,
>   Shawn
> 
> "For the things we have to learn before we can do them, we learn by 
doing them."
>   Aristotle
>


If I know the image hieght but not the width (i am resizing it using 
Imagemagick), how would I get it to show the image correctly?

Bill H