1 /*
2  * Copyright © 2014 Broadcom
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  */
23 
24 /**
25  * Stub support for occlusion queries.
26  *
27  * Since we expose support for GL 2.0, we have to expose occlusion queries,
28  * but the spec allows you to expose 0 query counter bits, so we just return 0
29  * as the result of all our queries.
30  */
31 #include "vc4_context.h"
32 
33 struct vc4_query
34 {
35         uint8_t pad;
36 };
37 
38 static struct pipe_query *
39 vc4_create_query(struct pipe_context *ctx, unsigned query_type, unsigned index)
40 {
41         struct vc4_query *query = calloc(1, sizeof(*query));
42 
43         /* Note that struct pipe_query isn't actually defined anywhere. */
44         return (struct pipe_query *)query;
45 }
46 
47 static void
48 vc4_destroy_query(struct pipe_context *ctx, struct pipe_query *query)
49 {
50         free(query);
51 }
52 
53 static boolean
54 vc4_begin_query(struct pipe_context *ctx, struct pipe_query *query)
55 {
56         return true;
57 }
58 
59 static bool
60 vc4_end_query(struct pipe_context *ctx, struct pipe_query *query)
61 {
62         return true;
63 }
64 
65 static boolean
66 vc4_get_query_result(struct pipe_context *ctx, struct pipe_query *query,
67                      boolean wait, union pipe_query_result *vresult)
68 {
69         uint64_t *result = &vresult->u64;
70 
71         *result = 0;
72 
73         return true;
74 }
75 
76 static void
77 vc4_set_active_query_state(struct pipe_context *pipe, boolean enable)
78 {
79 }
80 
81 void
82 vc4_query_init(struct pipe_context *pctx)
83 {
84         pctx->create_query = vc4_create_query;
85         pctx->destroy_query = vc4_destroy_query;
86         pctx->begin_query = vc4_begin_query;
87         pctx->end_query = vc4_end_query;
88         pctx->get_query_result = vc4_get_query_result;
89 	pctx->set_active_query_state = vc4_set_active_query_state;
90 }
91 
92