SmartFX Expand Layer Bounds - Shifter Example Project

Forum|Forum|5 years ago
November 22, 2020
3 replies
1181 views

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!

SDK

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Correct answer James Whiffin

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.

James Whiffin

Legend

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_52Author

Inspiring

@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 WhiffinCorrect answer

Legend

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.

Bruce Bullis

Community Manager

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.

R