[Mesa-dev] [PATCH 13/17] glapi/gen: Gather API version info across aliased functions.

[Paul Berry]

gl_XML.py's gl_function class keeps track of an entry_point_api_map
property that tracks, for each set of aliased functions, which ES1 or
ES2 version the given function name first appeared in.

This patch aggregates that information together across aliased
functions, into an easier-to-use api_map property.

Future patches will use this information when code generating
_mesa_create_exec_table(), to determine which set of dispatch table
entries should be populated based on the API.
---
 src/mapi/glapi/gen/gl_XML.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/mapi/glapi/gen/gl_XML.py b/src/mapi/glapi/gen/gl_XML.py
index a8000b4..92bbb86 100644
--- a/src/mapi/glapi/gen/gl_XML.py
+++ b/src/mapi/glapi/gen/gl_XML.py
@@ -617,6 +617,14 @@ class gl_function( gl_item ):
         # Decimal('1.1') }.
         self.entry_point_api_map = {}
 
+        # self.api_map[api] is a decimal value indicating the earliest
+        # version of the given API in which ANY alias for the function
+        # exists.  The map only lists APIs which contain the function
+        # in at least one version.  For example, for the ClipPlanex
+        # function, self.entry_point_api_map == { 'es1':
+        # Decimal('1.1') }.
+        self.api_map = {}
+
         self.assign_offset = 0
 
         self.static_entry_points = []
@@ -651,7 +659,11 @@ class gl_function( gl_item ):
             version_str = element.nsProp(api, None)
             assert version_str is not None
             if version_str != 'none':
-                self.entry_point_api_map[name][api] = Decimal(version_str)
+                version_decimal = Decimal(version_str)
+                self.entry_point_api_map[name][api] = version_decimal
+                if api not in self.api_map or \
+                        version_decimal < self.api_map[api]:
+                    self.api_map[api] = version_decimal
 
         if alias:
             true_name = alias
-- 
1.8.0