glx: Add GLX_EXT_get_drawable_type
diff --git a/extensions/EXT/GLX_EXT_get_drawable_type.txt b/extensions/EXT/GLX_EXT_get_drawable_type.txt
new file mode 100644
index 0000000..a46c5f4
--- /dev/null
+++ b/extensions/EXT/GLX_EXT_get_drawable_type.txt
@@ -0,0 +1,93 @@
+Name
+
+ EXT_get_drawable_type
+
+Name Strings
+
+ GLX_EXT_get_drawable_type
+
+Contributors
+
+ Adam Jackson, Red Hat
+ Kyle Brenneman, NVIDIA
+
+Contacts
+
+ Adam Jackson <ajax@redhat.com>
+
+Status
+
+ Complete.
+
+Version
+
+ Version 3, 24 September 2020
+
+Number
+
+ OpenGL Extension #552
+
+Dependencies
+
+ GLX 1.3 or higher is required.
+
+ This extension is written against the text of the GLX 1.4 specification.
+
+Overview
+
+ This extension adds to the set of drawable attributes that are sent in
+ a GLXGetDrawableAttributes request, and that can be queried with
+ glXQueryDrawable. While this is primarily a convenience for the client
+ library implementation, it may also be useful for applications.
+
+New Types
+
+ None
+
+New Procedures and Functions
+
+ None
+
+New Tokens
+
+ New attributes accepted for the <attribute> argument of
+ glXQueryDrawable:
+
+ GLX_DRAWABLE_TYPE 0x8010
+
+Additions to the GLX 1.4 specification
+
+ In Section 3.3.6 "Querying Attributes", add GLX_DRAWABLE_TYPE to the
+ list of legal values for the <attribute> parameter. The returned value
+ must have exactly one of GLX_{WINDOW,PIXMAP,PBUFFER}_BIT set.
+
+Issues
+
+ 1) Why add GLX_DRAWABLE_TYPE?
+
+ An X client may get the XID of a GLXDrawable from another process. When
+ this happens, the client library needs to import the drawable's state as
+ if the client had created it itself. Since different drawable types may
+ require different handling, this attribute allows the client library to
+ distinguish between windows, pixmaps, and pbuffers.
+
+ 2) Why use GLX_*_BIT for the GLX_DRAWABLE_TYPE value?
+
+ GLX_WINDOW and GLX_PBUFFER exist, but GLX_PIXMAP does not.
+
+ 3) Are there other attributes we should add?
+
+ RESOLVED. No, there aren't any other drawable (not fbconfig) attributes in
+ core GLX that aren't currently exposed, as far as we can tell. Drawable
+ attributes added by GLX extensions can be added in separate extensions.
+
+Revision History
+
+ Version 3, 24 September 2020
+ - Resolve issues, assign extension number, and mark as complete.
+
+ Version 2, 9 September 2020
+ - Change name to GLX_EXT_get_drawable_type.
+
+ Version 1, 24 August 2020
+ - Initial draft.
diff --git a/extensions/glext.php b/extensions/glext.php
index e76db85..9cd7eb6 100644
--- a/extensions/glext.php
+++ b/extensions/glext.php
@@ -1041,4 +1041,6 @@
</li>
<li value=551><a href="extensions/NV/NV_timeline_semaphore.txt">GL_NV_timeline_semaphore</a>
</li>
+<li value=552><a href="extensions/EXT/GLX_EXT_get_drawable_type.txt">GLX_EXT_get_drawable_type</a>
+</li>
</ol>
diff --git a/extensions/registry.py b/extensions/registry.py
index 8f3fa4e..a66b35a 100644
--- a/extensions/registry.py
+++ b/extensions/registry.py
@@ -1896,6 +1896,12 @@
'supporters' : { 'NVIDIA' },
'url' : 'extensions/EXT/EXT_geometry_shader4.txt',
},
+ 'GLX_EXT_get_drawable_type' : {
+ 'number' : 552,
+ 'flags' : { 'public' },
+ 'supporters' : { 'MESA' },
+ 'url' : 'extensions/EXT/GLX_EXT_get_drawable_type.txt',
+ },
'GLX_EXT_stereo_tree' : {
'number' : 452,
'flags' : { 'public' },
