<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - multiple uniform buffers problem"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84023">84023</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>multiple uniform buffers problem
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>minor
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ya.maxis11@yandex.ru
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>glsl-compiler
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=106468" name="attach_106468" title="c++ host">attachment 106468</a> <a href="attachment.cgi?id=106468&action=edit" title="c++ host">[details]</a></span>
c++ host
Today I tested how two uniform buffers work in mesa and find a bug, when unable
to edit second buffer. It's happen when you uses values from uniform buffers to
create vec4.
Vertex shader:
#version 330 core
uniform test_unif1
{
float test1;
float test2;
};
uniform test_unif2
{
float test3;
float test4;
};
in vec4 pos;
out vec4 fcolor;
void main(void)
{
gl_Position = pos;
fcolor = vec4(test1,test2,test3,test4);
}
test3 and test4 is unchangeable from c++ host. If I do this:
gl_Position = test4 * pos;
fcolor = vec4(test1,test2,test3,1.0f);
test3 and test4 will work ok. So I think it's a bug of driver.
Radeon 6480g + radeon 7470m. Ubuntu 14.10. Drivers from oibaf ppa.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>