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Intel Mesa Driver Supports New AMD GL Extension

Intel

Published on 23 November 2013 08:06 PM EST
Written by Michael Larabel in Intel
2 Comments

A few days ago Intel implemented GL_AMD_performance_monitor support within their open-source DRI graphics driver and now they have implemented support for another important modern OpenGL extension that happens to have been developed by AMD.

The extension that's now flipped on for Intel Ivy Bridge "Gen7" hardware and newer is the GL_AMD_vertex_shader_layer extension.

From the OpenGL.org registry specification, "This extension exposes the gl_Layer built-in variable in the vertex shader, allowing rendering to be directed to layered framebuffer attachments with only a vertex and fragment shader present. Combined with features such as instancing, or static vertex attributes and so on, this allows a wide variety of techniques to be implemented without the requirement for a geometry shader to be present."

Patches for implementing the GL_AMD_vertex_shader_layer OpenGL extension within Mesa have been floating around on the developers' patch list for months but now as of this weekend it's finally been fully wired-up and enabled for Intel on Gen7+ graphics hardware. The final patch enabling the support for this GL extension can be found by this Git commit.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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