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      Hello guys, 
       
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    • By Jens Eckervogt
      Hello everyone
      For @80bserver8 nice job - I have found Google search. How did you port from Javascript WebGL to C# OpenTK.?
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      Thanks!
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OpenGL Opengl- Diffrent Output for Adreno and Mali GPU

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I have A part of code in my Android App that gives me two diffrent Outputs for Two Adreno And Mali GPU:

Sg1hh.png

For Mali GPU

Sm8we.jpg

For Adreno GPU

And this is the Code:

if (DRAW_DEST_POLY && DrawDest) {
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
gl.glLineWidth(2.0f);
gl.glPointSize(3f);
gl.glColor4f(0.8f, 0.0f, 0.0f, 1.0f);
gl.glVertexPointer(2, GL10.GL_FLOAT, 0, mBufDestVertices);
gl.glDrawArrays(GL10.GL_LINE_LOOP, 0, OpenglPoly.getNumPoints());
gl.glDisable(GL10.GL_BLEND);
}

I want the OutPut to be like what in Mali GPU is. (the problem is the inner shape that in second image has faded out)

Edited by alireza.pir

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Where does the color come from?

In the code you just set black color, but the shape is red?

is GL_COLOR_ARRAY enabled?

 

I'm guessing the problem might be with that

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Where does the color come from?

In the code you just set black color, but the shape is red?

is GL_COLOR_ARRAY enabled?

 

I'm guessing the problem might be with that

sorry this is the right code:

 

if (DRAW_DEST_POLY && DrawDest) {
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
gl.glLineWidth(2.0f);
gl.glPointSize(3f);
gl.glColor4f(0.8f, 0.0f, 0.0f, 1.0f);
gl.glVertexPointer(2, GL10.GL_FLOAT, 0, mBufDestVertices);
gl.glDrawArrays(GL10.GL_LINE_LOOP, 0, OpenglPoly.getNumPoints());
gl.glDisable(GL10.GL_BLEND);
}

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Maybe try glDisableClientState(GL_COLOR_ARRAY); explicitly if you don't need it (and not already doing it)?

 

Just guessing, maybe it is enabled for some reason on the adreno and you get weird colors though that.

 

Looks very weird though, I notice also the frame has the same problem, and it looks to happen at the same X coordinate.

Is the frame drawn with 4 points one for each corner? If so, I don't think the problem is the color array...

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I know I say this a lot but Android and the graphics API support there is a big clusterfuck of shit.

You've run in to a driver bug; this will never be updated or fixed so best you can do is figure out a work around, detect the OS/device/driver combo and activate the work around when it is detected.

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Is glColor4f an immediate mode draw call? I think you're mixing vertex array and immediate color here.
Do you use a shader?

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Is glColor4f an immediate mode draw call? I think you're mixing vertex array and immediate color here.
Do you use a shader?


glColor is actually legal in ES and legal to mix with vertex arrays (ES doesn't have immediate mode), but like the others said, don't do anything unexpected and you stand the best chance of things actually working.

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I usually find the Adreno drivers to be the least compliant of all, with that said, I would not recommend using another GPU to confirm correctness. That said, I would verify using a third GPU is available, but who knows you may have encountered a driver bug..they are rampant in these mobile GPU drivers. Also, you are calling glVertexPointer, but I don't see where you are enabling/disabling the vertex array.

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