SmartFX Expand Layer Bounds - Shifter Example Project

[Nathan Lovell_52]

Using SmartFX and expanding on the 'Shifter' Example project, how can I expand the bounds of my square layer here to show the shifted image on top in its entirely, rather than being restricted to the original square?  

I know it is something to do with the extra and/or PF_CheckoutResult but cannot pinpoint how by messing with the result_rects!

Thanks!

 

[Rick Gerard]

Try applying Grow Bounds before you apply Shifter.

[Nathan Lovell_52]

Rick, I don't believe there are any example projects or code for that! I'm asking how to do it via the SDK, not applying premade effects.

[Bruce Bullis · Accepted solution]

If you want to go outside the bounds of the original layer to which the effect is applied, you'll need to resize the output buffer; see the (aptly-named) Resizer sample.

[James Whiffin · Accepted solution]

To expand the buffer in smartFX, in pre render you need to expand the result_rect and max_result_rect and then set the flag 

extra->output->flags = PF_RenderOutputFlag_RETURNS_EXTRA_PIXELS;

[Nathan Lovell_52]

@James Whiffin Which rects are we talking about, the extra or the input? I have tried on the extra and the input in various places in the PreRender(), but I get 'AEGP Magic Error'. Is this the right format? 

 

[James Whiffin · Accepted solution]

In my case, I expanded the result_rect, then unioned it with the output rects which also expanded them:

PF_Rect expandedRect = in_result.result_rect;

expandedRect.left -= stuffP->innerExpansion.left; // expand by subtracting on the left and top
expandedRect.top -= stuffP->innerExpansion.top;
expandedRect.right += stuffP->innerExpansion.right;
expandedRect.bottom += stuffP->innerExpansion.bottom;

UnionLRect(&expandedRect, &in_result.result_rect);
UnionLRect(&expandedRect, &in_result.max_result_rect);

UnionLRect(&in_result.result_rect, &extra->output->result_rect);

UnionLRect(&in_result.max_result_rect, &extra->output->max_result_rect);

I don't quite understand why your code gave a magic error though.

[AnmolM]

Here is the link from another thread with the checkout layer - https://community.adobe.com/t5/after-effects-discussions/is-it-possible-to-access-all-input-pixels-i...