[Mesa-dev] [Bug 104677] radv_generate_graphics_pipeline_key reads input rate from incorrect binding

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104677

            Bug ID: 104677
           Summary: radv_generate_graphics_pipeline_key reads input rate
                    from incorrect binding
           Product: Mesa
           Version: 17.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/radeon
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: philip.rebohle at tu-dortmund.de
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 136813
  --> https://bugs.freedesktop.org/attachment.cgi?id=136813&action=edit
Modification to the 'instancing' demo

The following code leads to incorrect vertex buffer reads if
pVertexBindingDescriptions[n].binding != n for any given n:

    binding = input_state->pVertexAttributeDescriptions[i].binding;
    if (input_state->pVertexBindingDescriptions[binding].inputRate)

Instead, this function should scan the binding descriptions for a binding that
has the same binding number as the vertex attribute.

This can be reproduced by reordering the vertex binding definition in the
'instancing' demo from Sascha Willems' Vulkan samples, see attachments.

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