g-truc/ogl-samples

gl-430-program-compute-image

elect86 opened this issue · 1 comments

elect86 commented

Ok, let me get this thing right 😕

In your initBuffer I saw you were initializing all the buffers passing a size twice as needed..

positionSize * 2

I tried first to set it back to 1 and then I got an exception at the first glTexBufferRange, because

"error(high) 1281: GL_INVALID_VALUE. + is greater than the value of BUFFER_SIZE for ."

This means that in our initBuffer we should do the same trick that we do for the transform buffur, that is getting the GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT and creating our input and output buffers with the max(textureBufferOffset, bufferSize), where bufferSize is essentially in sequence:

  • positionSize
  • texCoordSize
  • colorData

Am I right?

Groovounet commented

You are right, this was a bug in the sample. I changed the size to positionSize and it works just fine with me on AMD , Intel and NVIDIA drivers.

Thanks for reporting,
Christophe