Add ESSL support for GL_EXT_shader_realtime_clock

Author: ashleysmithcol

README.adoc

@@ -101,3 +101,4 @@ that do not live in the Khronos registries for OpenGL or OpenGL ES.
 - link:{repo}/nv/GLSL_NV_cluster_acceleration_structure.txt[GL_NV_cluster_acceleration_structure]
 - link:{repo}/nv/GLSL_NV_linear_swept_spheres.txt[GL_NV_linear_swept_spheres]
 - link:{repo}/ext/GLSL_EXT_nontemporal_keyword.txt[GL_EXT_nontemporal_keyword]
+- link:{repo}/ext/GL_EXT_shader_realtime_clock.txt[GL_EXT_shader_realtime_clock]

extensions/ext/GL_EXT_shader_realtime_clock.txt

@@ -16,15 +16,16 @@ Contributors
     Daniel Rakos, AMD
     Timothy Lottes, AMD
     Graham Sellers, AMD
+    Ashley Smith, Collabora
 
 Status
 
     Complete
 
 Version
 
-    Last Modified Date: 10/29/2019
-    Revision: 2
+    Last Modified Date: 2025/04/07
+    Revision: 3
 
 Number
 
@@ -40,6 +41,9 @@ Dependencies
 
     This extension interacts with GL_ARB_gpu_shader_int64.
 
+    Additional changes are written against the OpenGL ES Shading
+    Language Specification, Version 3.20.8, dated 2023/08/14.
+
 Overview
 
     This extension exposes a real-time counter which may be used
@@ -107,6 +111,11 @@ Dependencies on GL_ARB_gpu_shader_int64:
     If GL_ARB_gpu_shader_int64 is not supported, remove clockRealtimeEXT() and any
     reference to the uint64 type.
 
+Modifications to the OpenGL ES Shading Language Specification, Version 3.20.8
+
+    Incorporate all applicable modifications to the OpenGL Shading Language
+    Specification, Version 4.40 above.
+
 IP Status
 
     None.
@@ -121,7 +130,8 @@ Issues
 
 Revision History
 
-    Rev  Date        Author    Changes
-    ---  ----------  --------  ---------------------------------------------
-      1  10/02/2018  ahagan    Initial revision based on ARB_shader_clock.
-      2  10/29/2019  dgkoch    Add mapping to SPIR-V section, mark complete.
+    Rev  Date        Author          Changes
+    ---  ----------  --------        ---------------------------------------------
+      1  10/02/2018  ahagan          Initial revision based on ARB_shader_clock.
+      2  10/29/2019  dgkoch          Add mapping to SPIR-V section, mark complete.
+      3  07/04/2025  ashleysmithcol  Add modifications for ESSL.