Image loses ColorMatrixFilter when zoomed above 2880 pixels

Question

I have a image viewer component that allows the user to zoom
and scroll an image. The user is allowed to invert the image. The
problem I have is that when the user zooms the image so that the
height is above 2880 the image loses its inverted filter and
reverts to viewing the original image. The following is from the
DisplayObect.cacheAsBitmap flex doc.
The cacheAsBitmap property is automatically set to true
whenever you apply a filter to a display object (when its filter
array is not empty), and if a display object has a filter applied
to it, cacheAsBitmap is reported as true for that display object,
even if you set the property to false. If you clear all filters for
a display object, the cacheAsBitmap setting changes to
what it was last set to.
A display object does not use a bitmap even if the
cacheAsBitmap property is set to true and instead renders from
vector data in the following cases:
The bitmap is too large: greater than 2880 pixels in either
direction.
The bitmap fails to allocate (out of memory error).
My relevant section of code for applying the inverted state
to the
image follows:
public function invertImage():void
var matrix:Array = new Array();
matrix = matrix.concat([-1, 0, 0, 0, 255]);
matrix = matrix.concat([ 0, -1, 0, 0, 255]);
matrix = matrix.concat([ 0, 0, -1, 0, 255]);
matrix = matrix.concat([ 0, 0, 0, 1, 0]);
var filter:ColorMatrixFilter = new
ColorMatrixFilter(matrix);
var filters:Array = new Array();
filters.push(filter);
image.filters = filters;
Any suggestions on how I can workaround the 2880 limitation?

Answer 1

Louis, it sounds like you have a few problems to overcome here.
First, Facebook seems to be confused about what size of a picture it wants.
Second, your image is taller than wde (220 x 426), and Facebook wasts the cover image to be wider than tall (851? x 315?).  You will have to crop something to make that happen.
How do I zoom out on the image and save it ??
Zooming is irrelevant to what your picture looks like or the size of the picture.  Think of a magnifying glass on top of that huge unabridged dictionary in the library.  You don't change anything about the dictionary by looking at it through a magnifying glass.  You just change how you perceive it.
You need to resample the image.  In your case, you need to put more pixels into the photo than currently exist.  You might think about creating a different picture that's the right size, or at least has more pixels.  By resmpling to incldue more pixels, your photos will becoem "pixelated".
nathan