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Insectoid

Sat Feb 15, 2014 3:46 pm


Bitmaps with negative height values

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Does Turing properly display bitmaps with negative height values? OSX saves all bitmaps with negative heights and it's the only reason I can think of that would cause the issue I'm having. I've tried drawing this particular image as JPG and GIF, but the BMP format won't work. Can someone drawing it in Turing to see if it's an issue on my end or with Turing itself?


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Zren

Sat Feb 15, 2014 3:59 pm


RE:Bitmaps with negative height values

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Nope. Draws nothing. Scaling it to the same size show that only one row of pixels is even loaded it looks like.


var picId := Pic.FileNew ("C:\\Users\\Admin\\Downloads\\dirt_158.bmp")
put Pic.Width (picId)
put Pic.Height (picId)
var scaledPicId := Pic.Scale (picId, abs (Pic.Width (picId)), abs (Pic.Height (picId)))
Pic.Draw (scaledPicId, maxx div 2, maxy div 2, picCopy)


http://i.imgur.com/SXCJYX7.png


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Insectoid

Sat Feb 15, 2014 4:09 pm


RE:Bitmaps with negative height values

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Damn. Oh well, thanks anyway.


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Raknarg

Sun Feb 16, 2014 10:08 pm


RE:Bitmaps with negative height values

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What are negative values supposed to do?


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Insectoid

Sun Feb 16, 2014 11:00 pm


RE:Bitmaps with negative height values

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Bitmaps with positive height values are stored upside-down in ram. Bitmaps with negative values are stored right-side-up.