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[//lasso
/*----------------------------------------------------------------------------
[image_scaleDisplay]
Scales the specified image within the given dimensions if the image doesn\'t fit.
Author: Marc Pinnell (Based almost entirely on Jason Huck's work)
Last Modified: March 17, 2009
License: Public Domain
Description:
Calculates max height and width of an image within the given dimensions, maintaining the aspect
ratio of the original image. Returns a width="xx" height="xx" string for use in an image tag.
Requires [math_proportion], available here.
Sample Usage:
var('imgSize' = string);
inline(
-username='xxxxxx',
-password='xxxxxx'
);
$imgSize = image_scaleDisplay(
-source='myImg.tiff',
-width=300,
-height=300
);
/inline;
<img src="myImg.tiff" [$imgSize] alt="Description my sized image" />
Latest version available from <http://tagSwap.net/image_scaleDisplay>.
----------------------------------------------------------------------------*/
define_tag(
'scaleDisplay',
-namespace='image_',
-priority='replace',
-required='source',
-type='string',
-required='width',
-type='integer',
-required='height',
-type='integer',
-description='Scales the specified image within the given dimensions if the image doesn\'t fit and outputs a width/height string for use in image tag.'
);
local('img') = image(#source);
local(
'mW' = @#width,
'mH' = @#height,
'oW' = @#img->width,
'oH' = @#img->height,
'nW' = integer,
'nH' = integer,
'imgSize' = string
);
if(#oW > #width || #oH > #height); //check to see if either dimension is too large
//Something is too big, scale it!
if(#oW >= #oH);
#nW = #mW;
#nH = math_proportion(#oW,#oH,#nW,'x');
if(#nH > #mH);
#nH = #mH;
#nW = math_proportion(#oW,#oH,'x',#nH);
/if;
else;
#nH = #mH;
#nW = math_proportion(#oW,#oH,'x',#nH);
if(#nW > #mW);
#nW = #mW;
#nH = math_proportion(#oW,#oH,#nW,'x');
/if;
/if;
else;
//It fits, leave it alone
#nW = #oW;
#nH = #oH;
/if;
#imgSize += 'width="'#nW'" height="'#nH'"';
return(@#imgSize);
/define_tag;
]
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