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opengl rendering pixels gives white lines


opengl rendering pixels gives white lines

By : user2952754
Date : November 19 2020, 01:01 AM
like below fixes the issue at n.m. tip i added glEnable(GL_BLEND); glEnable(GL_POINT_SMOOTH); glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); at the end of my init and it worked!
code :


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Extra white lines/pixels

Extra white lines/pixels


By : Cristiano Wellsy 7
Date : March 29 2020, 07:55 AM
may help you . I have a webpage - http://bit.ly/YHFX5B and if you take a look at the footer you will see that there are a few extra white pixels/lines after it. I can't understand where they are coming from. , it's caused by padding in this style:
code :
#footer a {
   padding: 4px 4px 4px 0;
}
#footer a {
    padding: 4px 4px 2px 0
}
Where can stray out-of-triangle pixels near an edge appear from when rendering in OpenGL?

Where can stray out-of-triangle pixels near an edge appear from when rendering in OpenGL?


By : user2337929
Date : March 29 2020, 07:55 AM
To fix this issue Sorry, I forgot to answer this, but I should.
So, this turned out to be an extremely silly error - in the somewhat convoluted pipeline, the output became a JPEG file (even though that's not the format I eventually opened it in GIMP with, that'd have hopefully struck me). And this mess around the edges is an obvious JPEG compression artifact then.
openGL Transparent pixels unexpectedly White

openGL Transparent pixels unexpectedly White


By : Guilherme
Date : March 29 2020, 07:55 AM
Hope this helps
I don't know how to explain some of these behaviors, but something seems off. 0 alpha should be the same regardless of color, shouldn't it?
code :
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
OpenGL FBO - White pixels appear transparent

OpenGL FBO - White pixels appear transparent


By : Ammar Gawanmh
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'ts a bit difficult to tell what your problem is exactly, because you didn't provide source code. Alas, I see several potential troublemakers:
First you told that you want to draw a glow around the button. I presume, that all the buttons are drawn into the FBO, merging them into a UI overlay. Glow sounds to me, like you want to blend something, so you probably also want to have blending enabled, drawing to the FBO.
OpenGL unwanted pixels when rendering a texture with transparency

OpenGL unwanted pixels when rendering a texture with transparency


By : dgaskell
Date : March 29 2020, 07:55 AM
To fix this issue Short answer: Nicol Bolas is right that you should investigate pre-multiplied alpha, and here's the math that explains why.
Why it won't work correctly
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