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AppGameKit Classic Chat / GetImage

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Grumpy Jedi
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Posted: 2nd May 2012 20:27
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I was wondering if the GetImage command could have an option added to treat the screen background as transparency.

What I would like to be able to do is capture an image within my app with the SetClearColor() background treated as transparent so I could then save it as a .png with transparency.

Any chance that's a possibility in the future?
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baxslash
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Posted: 2nd May 2012 21:42
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The background is already treated as transparent unless you set it I think. My Spriter example certainly had a transparent background.

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bjadams
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Posted: 2nd May 2012 21:58
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Baxslash, I am only getting a black rectangle using the getimage command. what am i doing wrong?
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baxslash
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Posted: 3rd May 2012 00:13
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I answered in the other thread but basically you need to render or draw your sprites then call getImage, then call clearScreen.

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bjadams
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Posted: 4th May 2012 11:34
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I have tested GetImage on Windows7 and Windows8 using the latest Nvidia drivers and it is not grabbing the transparency or semi-transparency correctly. It is treating the background as black and hence semi-transparencies show on black = not very good for building masks
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bjadams
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Posted: 4th May 2012 11:35
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Another problem is that when using the Virtual resolution and AppGameKit adds black borders on the side, the GetImage command is taking into consideration these black borders and hence the X Y co-ords do not function well
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bjadams
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Posted: 4th May 2012 11:46
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This is the wrong way it is appearing:



This is the right way it should behave:

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baxslash
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Posted: 4th May 2012 12:03
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I can confirm that this works on my PC using the example code in this link: https://forumfiles.thegamecreators.com/download/2344424

...but on bjadams machine the same code does produces the image he has shown.

This would appear to be a graphics issue, my machine uses Windows Vista (up to date) and has a ATI FireGL V3100 graphics card. I haven't had a chance to try this code on my Nvidia machine yet but once I do I will post the results here.

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bjadams
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Posted: 4th May 2012 14:26
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Baxslash most probably it's an nvidia ogl thing rather than a windows one
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baxslash
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Posted: 4th May 2012 14:31
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Yes, probably.

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