Comment # 13
on bug 97305
from Matias N. Goldberg
I've added a "Proof of the bug".
There IS a bug. I don't know if it's software or in the hardware. The attached
sample does the following:
1. Create a 1MB buffer.
2. Fill the first 4kb with the pattern:
data[i+0] = 1.0f;
data[i+1] = 0.5f;
data[i+2] = 0.15f;
data[i+3] = 0.0f;
3. Attach it via:
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_BUFFER, texName );
glTexBufferRange( GL_TEXTURE_BUFFER, GL_RGBA32F, vboName,
elementStart*sizeof(float),
1024*4*sizeof(float) );
++elementStart;
4. Render a triangle showing the colours.
If the alignment is not a problem, I should see Orange-Cream, then Carmine,
then blue-violetish, then green; repeat.
Instead I **ALWAYS** see Orange-Cream; which is clearly incorrect.
After running the sample long enough, elementStart will be > 1024 (thus 1024*4
exceeding 4kb) and begins to display black. (and if you leave it long enough
running it could crash or throw an error, that's not the point)
You are receiving this mail because:
- You are the assignee for the bug.
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