1 files changed, 108 insertions, 0 deletions
diff --git a/glew/auto/EGL-Registry/extensions/EXT/EGL_EXT_bind_to_front.txt b/glew/auto/EGL-Registry/extensions/EXT/EGL_EXT_bind_to_front.txt
new file mode 100644
index 0000000..e83f9c9
--- /dev/null
+++ b/glew/auto/EGL-Registry/extensions/EXT/EGL_EXT_bind_to_front.txt
@@ -0,0 +1,108 @@
+Name
+
+  EXT_bind_to_front
+
+Name Strings
+
+  EGL_EXT_bind_to_front
+
+
+Contributors
+
+  Daniel Herring
+
+Contacts
+  
+  Daniel Herring, Core Avionics & Industrial Inc., daniel dot herring at ch1group dot com
+
+Status
+
+  Complete
+
+Version
+
+  Version 1.0, February 21, 2017
+
+Number
+
+  EGL Extension #121
+
+Dependencies
+
+  Requires EGL 1.2.
+
+Overview
+
+  This extension allows for using double buffered Pbuffers for rendering to textures, by 
+  allowing a new enumeration to be used in eglBindTexImage. EGL_FRONT_BUFFER_EXT is used
+  to denote reading the textures data from the front buffer of a double buffered Pbuffer.
+
+New Types
+
+  None
+
+New Procedures and Functions
+
+  None
+
+New Tokens
+  
+  EGL_FRONT_BUFFER_EXT          0x3464     
+
+Modify Section 3.6.1 of the EGL 1.2 Specification, paragraph 1
+  Add EGL_FRONT_BUFFER_EXT to list of acceptable values for buffer attribute.
+
+Modify Section 3.6.2 of the EGL 1.2 Specification, paragraph 5
+  Add EGL_FRONT_BUFFER_EXT to list of acceptable values for buffer attribute.
+
+Modify Section 3.5.2 of the EGL 1.2 Specification, paragraph 4 
+  Add EGL_RENDER_BUFFER to list of attributes which can be accepted in attrib_list.
+  
+Add to Section 3.5.2 of the EGL 1.2 Specification
+  EGL_RENDER_BUFFER specifies the number of color buffers which should be useable by the
+  client API rendering to the Pbuffer. If its value is EGL_SINGLE_BUFFER, then there is 
+  one color buffer the client APIs will render to directly. If its value is EGL_BACK_BUFFER,
+  then there are at least two color buffers the client API can render to. eglSwapBuffers 
+  is used to switch which color buffer is currently being rendered to. By default, all 
+  client APIs should render into the back buffer. The default value of EGL_RENDER_BUFFER
+  is EGL_SINGLE_BUFFER.
+
+Modify Section 2.2.2 of the EGL 1.2 Specification, paragraph 2
+    Pbuffer surfaces have a back buffer but no associated window, so the back buffer 
+    need not be copied.
+  Change to:
+    Pbuffer surfaces have no associated window, and include a back buffer, used by 
+    default, for rendering to by the client API. Pbuffers may have a front buffer 
+    used during render to texture operations to provide a read only texture which may
+    be used while the back buffer is being rendered to.
+ 
+Modify Section 3.5.6 
+    Querying EGL RENDER BUFFER returns the buffer which client API rendering
+    is requested to use. For a window surface, this is the same attribute value
+    specified when the surface was created. For a Pbuffer surface, it is always
+    EGL BACK BUFFER. For a pixmap surface, it is always EGL SINGLE BUFFER. To
+    determine the actual buffer being rendered to by a context, call eglQueryContext
+    (see section 3.7.4).
+
+  Change to:
+    Querying EGL RENDER BUFFER returns the buffer which client API rendering
+    is requested to use. For a window surface or Pbuffer surface, this is the 
+    same attribute value specified when the surface was created. For a pixmap 
+    surface, it is always EGL SINGLE BUFFER. To determine the actual buffer being
+    rendered to by a context, call eglQueryContext (see section 3.7.4).
+
+Revision History
+  Version 1.0, 21/02/2017 - Initial Version
+  
+Question:
+  What if the implementation  already uses double buffering for single buffered PBuffers? 
+  Such as when an implementation must insert a resolve to a texture instead of being 
+  able to use the same memory.
+Answer:
+  EGL_BACK_BUFFER would still refer to the resolved buffer. But in the case of the a 
+  double buffer EGL_FRONT_BUFFER should be used to reference the resolved buffer instead
+  of EGL_BACK_BUFFER as in this case the user has specified 2 buffers and knows they want 
+  the resolved buffer.
+  In the double buffer case where only a back draw and a front resolved buffer is used 
+  the implementation may not support EGL_BACK_BUFFER and should generate an EGL_BAD_
+  PARAMETER error when not supporting EGL_BACK_BUFFER texture binding.