src/compiler/glsl/lower_buffer_access.h

   1 /*
   2  * Copyright (c) 2015 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 /**
  25  * \file lower_buffer_access.h
  26  *
  27  * Helper for IR lowering pass to replace dereferences of buffer object based
  28  * shader variables with intrinsic function calls.
  29  *
  30  * This helper is used by lowering passes for UBOs, SSBOs and compute shader
  31  * shared variables.
  32  */
  33
  34 #ifndef LOWER_BUFFER_ACCESS_H
  35 #define LOWER_BUFFER_ACCESS_H
  36
  37 #include "ir.h"
  38 #include "ir_rvalue_visitor.h"
  39
  40 namespace lower_buffer_access {
  41
  42 class lower_buffer_access : public ir_rvalue_enter_visitor {
  43 public:
  44    virtual void
  45    insert_buffer_access(void *mem_ctx, ir_dereference *deref,
  46                         const glsl_type *type, ir_rvalue *offset,
  47                         unsigned mask, int channel) = 0;
  48
  49    void emit_access(void *mem_ctx, bool is_write, ir_dereference *deref,
  50                     ir_variable *base_offset, unsigned int deref_offset,
  51                     bool row_major, const glsl_type *matrix_type,
  52                     enum glsl_interface_packing packing,
  53                     unsigned int write_mask);
  54
  55    bool is_dereferenced_thing_row_major(const ir_rvalue *deref);
  56
  57    void setup_buffer_access(void *mem_ctx, ir_rvalue *deref,
  58                             ir_rvalue **offset, unsigned *const_offset,
  59                             bool *row_major,
  60                             const glsl_type **matrix_type,
  61                             const glsl_struct_field **struct_field,
  62                             enum glsl_interface_packing packing);
  63
  64 protected:
  65    bool use_std430_as_default;
  66 };
  67
  68 } /* namespace lower_buffer_access */
  69
  70 #endif /* LOWER_BUFFER_ACCESS_H */