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Forum Index : Microcontroller and PC projects : IMAGE ROTATE [_FAST]

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yock1960
Senior Member

Joined: 18/08/2020
Location: United States
Posts: 167

Posted: 11:49am 05 Dec 2020

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Has there been an undocumented change or just lagging documentation and/or have I missed the noted change? The current docs say that you can flag the command to ignore black pixels. _FAST accepts the flag parameter, 'unfast' does not (syntax). It's not a huge difference, but when using the command to rotate text to 'any' angle, the quality does noticeably decrease and the black triangles are ugly!

I'm using _FAST, haven't figured out another solution.

Steve

djwildstar
Newbie

Joined: 29/07/2020
Location: United States
Posts: 24

Posted: 09:49pm 15 Dec 2020

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I asked this question a while back, and my understanding is that this isn't a bug -- IMAGE ROTATE and IMAGE RESIZE intentionally lack the optional flag to ignore black pixels. The documentation should get updated to reflect that the _FAST versions take the flag while the non-fast (bilinear) versions do not.

As a work-around you could use IMAGE RESIZE or IMAGE ROTATE as appropriate to scale and rotate your image, and then use IMAGE RESIZE_FAST with 1:1 scaling (new width and height the same as existing width and height) to copy the image without writing black pixels.

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10590

Posted: 10:38pm 15 Dec 2020

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Why not read the release notes and/or manual for V5.06.00?

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