1 /*
2  * Copyright © 2013 Intel Corporation
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
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 #ifndef LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H
25 #define LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H
26 
27 #include "ir.h"
28 #include "util/hash_table.h"
29 
30 struct uniform_block_array_elements {
31    unsigned *array_elements;
32    unsigned num_array_elements;
33    /**
34     * Size of the array before array-trimming optimizations.
35     *
36     * Locations are only assigned to active array elements, but the location
37     * values are calculated as if all elements are active. The total number
38     * of elements in an array including the elements in arrays of arrays before
39     * inactive elements are removed is needed to be perform that calculation.
40     */
41    unsigned aoa_size;
42 
43    ir_dereference_array *ir;
44 
45    struct uniform_block_array_elements *array;
46 };
47 
48 struct link_uniform_block_active {
49    const glsl_type *type;
50    ir_variable *var;
51 
52    struct uniform_block_array_elements *array;
53 
54    unsigned binding;
55 
56    bool has_instance_name;
57    bool has_binding;
58    bool is_shader_storage;
59 };
60 
61 class link_uniform_block_active_visitor : public ir_hierarchical_visitor {
62 public:
link_uniform_block_active_visitor(void * mem_ctx,struct hash_table * ht,struct gl_shader_program * prog)63    link_uniform_block_active_visitor(void *mem_ctx, struct hash_table *ht,
64 				     struct gl_shader_program *prog)
65       : success(true), prog(prog), ht(ht), mem_ctx(mem_ctx)
66    {
67       /* empty */
68    }
69 
70    virtual ir_visitor_status visit_enter(ir_dereference_array *);
71    virtual ir_visitor_status visit(ir_dereference_variable *);
72    virtual ir_visitor_status visit(ir_variable *);
73 
74    bool success;
75 
76 private:
77    struct gl_shader_program *prog;
78    struct hash_table *ht;
79    void *mem_ctx;
80 };
81 
82 #endif /* LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H */
83