<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Wrong values returned by GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT & GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT randomly breaks stuff" href="https://bugs.freedesktop.org/show_bug.cgi?id=97305#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Wrong values returned by GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT & GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT randomly breaks stuff" href="https://bugs.freedesktop.org/show_bug.cgi?id=97305">bug 97305</a> from <a class="email" href="mailto:dark_sylinc@yahoo.com.ar" title="Matias N. Goldberg <dark_sylinc@yahoo.com.ar>"> Matias N. Goldberg</a> <pre>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)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>