src/compiler/glsl/link_uniform_block_active_visitor.h

   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:
  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 */