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/*
* Copyright (c) 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file lower_buffer_access.h
*
* Helper for IR lowering pass to replace dereferences of buffer object based
* shader variables with intrinsic function calls.
*
* This helper is used by lowering passes for UBOs, SSBOs and compute shader
* shared variables.
*/
#ifndef LOWER_BUFFER_ACCESS_H
#define LOWER_BUFFER_ACCESS_H
#include "ir.h"
#include "ir_rvalue_visitor.h"
namespace lower_buffer_access {
class lower_buffer_access : public ir_rvalue_enter_visitor {
public:
virtual void
insert_buffer_access(void *mem_ctx, ir_dereference *deref,
const glsl_type *type, ir_rvalue *offset,
unsigned mask, int channel) = 0;
void emit_access(void *mem_ctx, bool is_write, ir_dereference *deref,
ir_variable *base_offset, unsigned int deref_offset,
bool row_major, int matrix_columns,
unsigned int packing, unsigned int write_mask);
bool is_dereferenced_thing_row_major(const ir_rvalue *deref);
void setup_buffer_access(void *mem_ctx, ir_rvalue *deref,
ir_rvalue **offset, unsigned *const_offset,
bool *row_major, int *matrix_columns,
const glsl_struct_field **struct_field,
enum glsl_interface_packing packing);
protected:
bool use_std430_as_default;
};
} /* namespace lower_buffer_access */
#endif /* LOWER_BUFFER_ACCESS_H */
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