eb63640c1d
Signed-off-by: Emil Velikov <emil.velikov@collabora.com> Acked-by: Matt Turner <mattst88@gmail.com> Acked-by: Jose Fonseca <jfonseca@vmware.com>
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file lower_offset_array.cpp
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*
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* IR lower pass to decompose ir_texture ir_tg4 with an array of offsets
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* into four ir_tg4s with a single ivec2 offset, select the .w component of each,
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* and return those four values packed into a gvec4.
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*
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* \author Chris Forbes <chrisf@ijw.co.nz>
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*/
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#include "compiler/glsl_types.h"
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#include "ir.h"
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#include "ir_builder.h"
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#include "ir_optimization.h"
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#include "ir_rvalue_visitor.h"
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using namespace ir_builder;
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class lower_offset_array_visitor : public ir_rvalue_visitor {
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public:
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lower_offset_array_visitor()
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{
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progress = false;
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}
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void handle_rvalue(ir_rvalue **rv);
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bool progress;
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};
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void
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lower_offset_array_visitor::handle_rvalue(ir_rvalue **rv)
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{
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if (*rv == NULL || (*rv)->ir_type != ir_type_texture)
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return;
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ir_texture *ir = (ir_texture *) *rv;
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if (ir->op != ir_tg4 || !ir->offset || !ir->offset->type->is_array())
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return;
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void *mem_ctx = ralloc_parent(ir);
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ir_variable *var =
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new (mem_ctx) ir_variable(ir->type, "result", ir_var_temporary);
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base_ir->insert_before(var);
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for (int i = 0; i < 4; i++) {
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ir_texture *tex = ir->clone(mem_ctx, NULL);
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tex->offset = new (mem_ctx) ir_dereference_array(tex->offset,
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new (mem_ctx) ir_constant(i));
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base_ir->insert_before(assign(var, swizzle_w(tex), 1 << i));
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}
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*rv = new (mem_ctx) ir_dereference_variable(var);
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progress = true;
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}
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bool
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lower_offset_arrays(exec_list *instructions)
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{
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lower_offset_array_visitor v;
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visit_list_elements(&v, instructions);
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return v.progress;
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}
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