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      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