Hey!
I have a question about rendering a spine sprite over a FBO (Frame Buffer Object) in LibGDX.
If I render the sprite directly to the screen, I get no problems, but if I render it to a FBO and then to the screen, this black borders
appears again (viewtopic.php?f=9&t=1046).
What's the problem? I need to configure something in the FBO? filtering? blending function? some spine exporting options?
Thanks in advance.
Are you using premultiplied alpha? It is needed to get the correct blending.
I've enabled premultiplied alpha using skeletonRenderer.setPremultipliedAlpha(true) to draw to the FBO.
[...]
FBO.begin();
skeletonRenderer.setPremultipliedAlpha(true);
skeletonRenderer.draw(batch,skeleton);
batch.flush();
FBO.end();
[...]
batch.draw(texture region asociated to FBO);
Did it help? You'll still need to use premultiplied images, eg when packing your atlas.
Doesn't work 
.Firstly, We're using bleeding, but for this test I disabled bleeding and save the atlas using premultiplied alpha and now, black borders appears rendering directly to the screen (enabling premultiplied alpha in the skeleton renderer of course). Maybe I misunderstood something?
Bleeding is really just a hack to work around incorrect blending when not using premultiplied alpha (PMA). You shouldn't see black borders if your images are PMA and you enable PMA for the renderer. I just tested spineboy, exported the JSON with atlas using PMA, ran AnimationStateTest, had black borders (forgot linear in this screenshot):
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Called renderer.setPremultipliedAlpha(true) and rendering is good:
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Maybe Have We configured incorrectly the texture atlas settings?
This is the character in spine.
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Texture atlas settings:
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In Game Character:
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Are We doing something wrong?
Settings look fine. It shouldn't look like that if you are calling renderer.setPremultipliedAlpha(true). You sure you are?
OMG I have 2 constructors, and I do renderer.setPremultipliedAlpha(true) in just one, the one that.... I'm not using really. Everything works fine now and I feel myself a little bit silly xD. Thank you for your help and sorry for wasting your time Nate.
