2014-07-30 12:04:49 -07:00
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/*
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* Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
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* Copyright (C) 2008 VMware, Inc. All Rights Reserved.
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* Copyright © 2014 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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2018-04-30 20:39:43 +10:00
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#include "compiler/nir/nir.h"
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#include "gl_nir.h"
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2014-07-30 12:04:49 -07:00
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2017-03-02 11:28:14 -08:00
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bool
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2018-04-30 20:39:43 +10:00
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gl_nir_lower_samplers(nir_shader *shader,
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const struct gl_shader_program *shader_program)
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2014-07-30 12:04:49 -07:00
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{
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nir: Make gl_nir_lower_samplers use gl_nir_lower_samplers_as_deref
These days, we have two sampler lowering passes. The newer one,
gl_nir_lower_samplers_as_deref, is used by radeonsi. It rewrites
variables to drop structures out of sampler deref chains, to make
life simpler. It then sets var->data.binding for non-bindless
sampler and image variables based on the GL uniform storage's
opaque index values.
The older one converts sampler deref chains (nir_tex_src_texture_deref)
to a numerical offset (nir_tex_src_texture_offset). It also stores the
constant-valued portion of that number in tex->texture_index, making
life really simple for drivers that don't support indirects. It too
pokes at GL uniform storage's opaque index values.
Logically, we can do the first pass (simplify derefs, set bindings)
then the second (turn derefs to offsets, set texture_index). This
patch does exactly that, eliminating some redundancy (only one pass
has to poke at GL uniform storage), and gaining proper var->data.binding
values for drivers using the full lowering.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
2019-01-02 23:34:19 -08:00
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/* First, use gl_nir_lower_samplers_as_derefs to set var->data.binding
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* based on the uniforms, and split structures to simplify derefs.
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*/
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gl_nir_lower_samplers_as_deref(shader, shader_program);
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2019-08-28 22:34:14 +02:00
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return nir_lower_samplers(shader);
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2014-07-30 12:04:49 -07:00
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}
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