[Bug 82586] New: UBO matrix in std140 struct does not work

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Aug 13 14:54:47 PDT 2014


          Priority: medium
            Bug ID: 82586
          Assignee: dri-devel at lists.freedesktop.org
           Summary: UBO matrix in std140 struct does not work
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: pavol at klacansky.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

I am not sure if the problem is actually in my code, but I tested it on nVidia
driver and it worked (but their compiler might have a fix for it internally).

Here is vertex shader:

#version 330

layout(location = 0) in vec4 position;

layout(std140) uniform Matrices {
    mat4 model;
    mat4 view;
    mat4 projection;
} matrices;

out gl_PerVertex {
    vec4 gl_Position;

/* interpolate to compute normal in fragment shader */
out vec3 v_position;

void main(void)
    v_position = vec3(matrices.view * matrices.model * position);
    gl_Position = matrices.projection * matrices.view * matrices.model *

If I use only one matrix from the uniform it works. I have printed UBOs values
and they are just identity matrices.

You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140813/dc9cd609/attachment.html>

More information about the dri-devel mailing list