Mesa (master): Remove error when calling glGenQueries/ glDeleteQueries while a query is active

[Carl Worth]

Module: Mesa
Branch: master
Commit: 29996e219912fb1fdf35a6595d8f6261384a18dc
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=29996e219912fb1fdf35a6595d8f6261384a18dc

Author: Carl Worth <cworth at cworth.org>
Date:   Thu Oct 17 10:54:56 2013 -0700

Remove error when calling glGenQueries/glDeleteQueries while a query is active

There is nothing in the OpenGL specification which prevents the user from
calling glGenQueries to generate a new query object while another object is
active. Neither is there anything in the Mesa implementation which prevents
this. So remove the INVALID_OPERATION errors in this case.

Similarly, it is explicitly allowed by the OpenGL specification to delete an
active query, so remove the assertion for that case, replacing it with the
necesssary state updates to end the query, (clear the bindpt pointer and call
into the driver's EndQuery hook).

CC: <mesa-stable at lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp at vmware.com>
Tested-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/main/queryobj.c |   25 ++++++++++---------------
 1 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/src/mesa/main/queryobj.c b/src/mesa/main/queryobj.c
index a180133..86e7c3a 100644
--- a/src/mesa/main/queryobj.c
+++ b/src/mesa/main/queryobj.c
@@ -202,13 +202,6 @@ _mesa_GenQueries(GLsizei n, GLuint *ids)
       return;
    }
 
-   /* No query objects can be active at this time! */
-   if (ctx->Query.CurrentOcclusionObject ||
-       ctx->Query.CurrentTimerObject) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glGenQueriesARB");
-      return;
-   }
-
    first = _mesa_HashFindFreeKeyBlock(ctx->Query.QueryObjects, n);
    if (first) {
       GLsizei i;
@@ -241,18 +234,20 @@ _mesa_DeleteQueries(GLsizei n, const GLuint *ids)
       return;
    }
 
-   /* No query objects can be active at this time! */
-   if (ctx->Query.CurrentOcclusionObject ||
-       ctx->Query.CurrentTimerObject) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glDeleteQueriesARB");
-      return;
-   }
-
    for (i = 0; i < n; i++) {
       if (ids[i] > 0) {
          struct gl_query_object *q = _mesa_lookup_query_object(ctx, ids[i]);
          if (q) {
-            ASSERT(!q->Active); /* should be caught earlier */
+            if (q->Active) {
+               struct gl_query_object **bindpt;
+               bindpt = get_query_binding_point(ctx, q->Target);
+               assert(bindpt); /* Should be non-null for active q. */
+               if (bindpt) {
+                  *bindpt = NULL;
+               }
+               q->Active = GL_FALSE;
+               ctx->Driver.EndQuery(ctx, q);
+            }
             _mesa_HashRemove(ctx->Query.QueryObjects, ids[i]);
             ctx->Driver.DeleteQuery(ctx, q);
          }