upscale filter for minimal dimensions

[bastrapp]

As brought up in #226 an "upscale" filter to ensure minimal dimensions would be handy (now, that allow_upscale is not doing the job anymore)... something like: upscale: { min-width: 100, min-height: 100 }

[ryall]

+1

[trsteel88]

+1

[brizzz]

+1

[lsmith77]

anyone got time to work on PR?

[maximecolin]

I also need this feature so I did a pull request about it : #248

[havvg]

@ryall @trsteel88 @brizzz @bastrapp Can you confirm, the PR #248 provides the filter the way you need it?

https://docs.google.com/spreadsheet/ccc?key=0Aj1Nx_UCbS3NdDJzU0V4U1pmTnduYkVsd1Uxeklsbnc&usp=sharing

[bastrapp]

if it works like the spreadsheet suggests it is exactly what I need.

[laurentChin]

the upscale filter upscale images smaller than the minimal dimensions but upscale the taller ones too, which is not necessarily desired, any idea how to avoid this ?

[maximecolin]

The upscale filter resize the image only if the width is smaller than the minimum width OR if the height is smaller than the minimum height.

if ($origWidth < $width || $origHeight < $height) {