Re: Cropping images with fading outline effects, using GD, etc.?

hi! Can you post a link to an image showing what you like to achieve? With the src image? Thanks! On Wed, Aug 7, 2013 at 9:46 AM, Jacob Kruger <jacob@blindza.co.za> wrote: > I need/want to be able to take either uploaded, or stored image files, and crop them into > either rectangular, or elliptical pieces/shapes, and am using GD library thus far. > > The basics are not an issue - for rectangular cropping, imagecopy and imagecopyresize, etc. are > functions that can handle it easily enough, and in terms of elliptical cropping, I am drawing an > elliptical shape onto the original image using a colour that's unlikely to be part of the > original image resource, with drawing line thickness set to 2 pixels for now, and then I do a form > of flood fill to border with that same colour outside the ellipsis, and then set that as the > transparent colour of the image, before copying the relevant part to another image resource as well. > > However, it now comes down to that the images to be saved might also need to have sort of > faded/increasingly transparent outlines, and these would generally be photo's, and so, just > choosing a single transparent colour won't really work too well. > > Was thinking simplest will be to in fact take multiple instances of each image, with each of > them going slightly smaller in terms of width/height, and then I could keep them centred on each > other, but sort of overlay them with the most transparent/faded/widest image instance starting from > back, and with sort of original colouration/narrowest one being applied to output resource last, and > this should implement a form of faded/blurred outline/edging to output image? > > However, it again comes down to trying to decide on best/simplest way to apply a form of global > transparency filter to an image resource, without needing to specify a specific colour each time for > something like the imagecolourtransparent function, since suppose would need to then figure out a > way to determine which RGB value would work best per image - and don't think that could be made > to work consistently either. > > In other words, what am really looking for at moment is a way to set the opacity of an image > resource - and if it comes down to capturing the output buffer while using something like imagepng > to stream the image resource to the buffer, that's not an issue either since am already using a > form of that to sometimes capture image resource data in another way, but, would need to find a way > to somehow affect opacity of output stream image then as well. > > While I am currently pretty much just using GD library, I would be open to other > suggestions/workarounds/thoughts on the simplest way to implement something like this? > > And, if I'm just missing, or haven't come across a simple way to implement > faded/graded outlines for images, would also like to know that...<smile> > > TIA > > Jacob Kruger > Blind Biker > Skype: BlindZA > '...fate had broken his body, but not his spirit...' -- Pierre @pierrejoye | http://blog.thepimp.net | http://www.libgd.org