568 lines
17 KiB
C
568 lines
17 KiB
C
/**************************************************************************
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*
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* Copyright 2009 VMware, Inc.
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* All Rights Reserved.
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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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* Texture sampling.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#ifndef LP_BLD_SAMPLE_H
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#define LP_BLD_SAMPLE_H
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#include "pipe/p_format.h"
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#include "util/u_debug.h"
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#include "gallivm/lp_bld.h"
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#include "gallivm/lp_bld_type.h"
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#include "gallivm/lp_bld_swizzle.h"
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struct pipe_resource;
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struct pipe_sampler_view;
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struct pipe_sampler_state;
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struct util_format_description;
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struct lp_type;
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struct lp_build_context;
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/**
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* Helper struct holding all derivatives needed for sampling
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*/
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struct lp_derivatives
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{
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LLVMValueRef ddx[3];
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LLVMValueRef ddy[3];
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};
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enum lp_sampler_lod_property {
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LP_SAMPLER_LOD_SCALAR,
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LP_SAMPLER_LOD_PER_ELEMENT,
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LP_SAMPLER_LOD_PER_QUAD
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};
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/**
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* Texture static state.
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*
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* These are the bits of state from pipe_resource/pipe_sampler_view that
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* are embedded in the generated code.
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*/
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struct lp_static_texture_state
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{
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/* pipe_sampler_view's state */
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enum pipe_format format;
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unsigned swizzle_r:3; /**< PIPE_SWIZZLE_* */
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unsigned swizzle_g:3;
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unsigned swizzle_b:3;
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unsigned swizzle_a:3;
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/* pipe_texture's state */
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unsigned target:4; /**< PIPE_TEXTURE_* */
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unsigned pot_width:1; /**< is the width a power of two? */
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unsigned pot_height:1;
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unsigned pot_depth:1;
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unsigned level_zero_only:1;
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};
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/**
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* Sampler static state.
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*
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* These are the bits of state from pipe_sampler_state that
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* are embedded in the generated code.
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*/
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struct lp_static_sampler_state
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{
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/* pipe_sampler_state's state */
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unsigned wrap_s:3;
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unsigned wrap_t:3;
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unsigned wrap_r:3;
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unsigned min_img_filter:2;
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unsigned min_mip_filter:2;
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unsigned mag_img_filter:2;
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unsigned compare_mode:1;
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unsigned compare_func:3;
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unsigned normalized_coords:1;
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unsigned min_max_lod_equal:1; /**< min_lod == max_lod ? */
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unsigned lod_bias_non_zero:1;
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unsigned apply_min_lod:1; /**< min_lod > 0 ? */
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unsigned apply_max_lod:1; /**< max_lod < last_level ? */
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unsigned seamless_cube_map:1;
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/* Hacks */
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unsigned force_nearest_s:1;
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unsigned force_nearest_t:1;
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};
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/**
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* Sampler dynamic state.
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*
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* These are the bits of state from pipe_resource/pipe_sampler_view
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* as well as from sampler state that are computed at runtime.
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*
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* There are obtained through callbacks, as we don't want to tie the texture
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* sampling code generation logic to any particular texture layout or pipe
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* driver.
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*/
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struct lp_sampler_dynamic_state
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{
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/* First callbacks for sampler view state */
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/** Obtain the base texture width (or number of elements) (returns int32) */
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LLVMValueRef
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(*width)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain the base texture height (returns int32) */
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LLVMValueRef
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(*height)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain the base texture depth (or array size) (returns int32) */
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LLVMValueRef
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(*depth)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain the first mipmap level (base level) (returns int32) */
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LLVMValueRef
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(*first_level)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain the number of mipmap levels minus one (returns int32) */
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LLVMValueRef
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(*last_level)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain stride in bytes between image rows/blocks (returns int32) */
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LLVMValueRef
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(*row_stride)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain stride in bytes between image slices (returns int32) */
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LLVMValueRef
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(*img_stride)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain pointer to base of texture */
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LLVMValueRef
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(*base_ptr)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/** Obtain pointer to array of mipmap offsets */
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LLVMValueRef
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(*mip_offsets)( const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm,
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unsigned texture_unit);
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/* These are callbacks for sampler state */
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/** Obtain texture min lod (returns float) */
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LLVMValueRef
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(*min_lod)(const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm, unsigned sampler_unit);
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/** Obtain texture max lod (returns float) */
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LLVMValueRef
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(*max_lod)(const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm, unsigned sampler_unit);
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/** Obtain texture lod bias (returns float) */
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LLVMValueRef
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(*lod_bias)(const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm, unsigned sampler_unit);
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/** Obtain texture border color (returns ptr to float[4]) */
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LLVMValueRef
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(*border_color)(const struct lp_sampler_dynamic_state *state,
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struct gallivm_state *gallivm, unsigned sampler_unit);
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};
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/**
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* Keep all information for sampling code generation in a single place.
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*/
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struct lp_build_sample_context
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{
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struct gallivm_state *gallivm;
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const struct lp_static_texture_state *static_texture_state;
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const struct lp_static_sampler_state *static_sampler_state;
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struct lp_sampler_dynamic_state *dynamic_state;
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const struct util_format_description *format_desc;
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/* See texture_dims() */
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unsigned dims;
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/** SIMD vector width */
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unsigned vector_width;
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/** number of mipmaps (valid are 1, length/4, length) */
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unsigned num_mips;
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/** number of lod values (valid are 1, length/4, length) */
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unsigned num_lods;
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/** regular scalar float type */
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struct lp_type float_type;
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struct lp_build_context float_bld;
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/** float vector type */
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struct lp_build_context float_vec_bld;
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/** regular scalar int type */
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struct lp_type int_type;
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struct lp_build_context int_bld;
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/** Incoming coordinates type and build context */
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struct lp_type coord_type;
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struct lp_build_context coord_bld;
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/** Signed integer coordinates */
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struct lp_type int_coord_type;
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struct lp_build_context int_coord_bld;
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/** Unsigned integer texture size */
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struct lp_type int_size_in_type;
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struct lp_build_context int_size_in_bld;
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/** Float incoming texture size */
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struct lp_type float_size_in_type;
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struct lp_build_context float_size_in_bld;
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/** Unsigned integer texture size (might be per quad) */
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struct lp_type int_size_type;
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struct lp_build_context int_size_bld;
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/** Float texture size (might be per quad) */
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struct lp_type float_size_type;
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struct lp_build_context float_size_bld;
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/** Output texels type and build context */
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struct lp_type texel_type;
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struct lp_build_context texel_bld;
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/** Float level type */
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struct lp_type levelf_type;
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struct lp_build_context levelf_bld;
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/** Int level type */
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struct lp_type leveli_type;
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struct lp_build_context leveli_bld;
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/** Float lod type */
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struct lp_type lodf_type;
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struct lp_build_context lodf_bld;
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/** Int lod type */
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struct lp_type lodi_type;
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struct lp_build_context lodi_bld;
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/* Common dynamic state values */
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LLVMValueRef row_stride_array;
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LLVMValueRef img_stride_array;
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LLVMValueRef base_ptr;
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LLVMValueRef mip_offsets;
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/** Integer vector with texture width, height, depth */
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LLVMValueRef int_size;
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LLVMValueRef border_color_clamped;
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};
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/**
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* We only support a few wrap modes in lp_build_sample_wrap_linear_int() at
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* this time. Return whether the given mode is supported by that function.
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*/
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static INLINE boolean
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lp_is_simple_wrap_mode(unsigned mode)
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{
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switch (mode) {
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case PIPE_TEX_WRAP_REPEAT:
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case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
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return TRUE;
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default:
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return FALSE;
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}
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}
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static INLINE void
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apply_sampler_swizzle(struct lp_build_sample_context *bld,
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LLVMValueRef *texel)
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{
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unsigned char swizzles[4];
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swizzles[0] = bld->static_texture_state->swizzle_r;
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swizzles[1] = bld->static_texture_state->swizzle_g;
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swizzles[2] = bld->static_texture_state->swizzle_b;
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swizzles[3] = bld->static_texture_state->swizzle_a;
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lp_build_swizzle_soa_inplace(&bld->texel_bld, texel, swizzles);
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}
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/*
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* not really dimension as such, this indicates the amount of
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* "normal" texture coords subject to minification, wrapping etc.
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*/
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static INLINE unsigned
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texture_dims(enum pipe_texture_target tex)
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{
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switch (tex) {
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case PIPE_TEXTURE_1D:
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case PIPE_TEXTURE_1D_ARRAY:
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case PIPE_BUFFER:
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return 1;
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case PIPE_TEXTURE_2D:
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case PIPE_TEXTURE_2D_ARRAY:
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case PIPE_TEXTURE_RECT:
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case PIPE_TEXTURE_CUBE:
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case PIPE_TEXTURE_CUBE_ARRAY:
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return 2;
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case PIPE_TEXTURE_3D:
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return 3;
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default:
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assert(0 && "bad texture target in texture_dims()");
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return 2;
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}
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}
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static INLINE boolean
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has_layer_coord(enum pipe_texture_target tex)
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{
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switch (tex) {
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case PIPE_TEXTURE_1D_ARRAY:
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case PIPE_TEXTURE_2D_ARRAY:
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/* cube is not layered but 3rd coord (after cube mapping) behaves the same */
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case PIPE_TEXTURE_CUBE:
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case PIPE_TEXTURE_CUBE_ARRAY:
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return TRUE;
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default:
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return FALSE;
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}
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}
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boolean
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lp_sampler_wrap_mode_uses_border_color(unsigned mode,
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unsigned min_img_filter,
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unsigned mag_img_filter);
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/**
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* Derive the sampler static state.
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*/
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void
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lp_sampler_static_sampler_state(struct lp_static_sampler_state *state,
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const struct pipe_sampler_state *sampler);
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void
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lp_sampler_static_texture_state(struct lp_static_texture_state *state,
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const struct pipe_sampler_view *view);
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void
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lp_build_lod_selector(struct lp_build_sample_context *bld,
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unsigned texture_index,
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unsigned sampler_index,
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LLVMValueRef s,
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LLVMValueRef t,
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LLVMValueRef r,
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LLVMValueRef cube_rho,
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const struct lp_derivatives *derivs,
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LLVMValueRef lod_bias, /* optional */
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LLVMValueRef explicit_lod, /* optional */
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unsigned mip_filter,
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LLVMValueRef *out_lod_ipart,
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LLVMValueRef *out_lod_fpart,
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LLVMValueRef *out_lod_positive);
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void
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lp_build_nearest_mip_level(struct lp_build_sample_context *bld,
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unsigned texture_unit,
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LLVMValueRef lod,
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LLVMValueRef *level_out,
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LLVMValueRef *out_of_bounds);
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void
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lp_build_linear_mip_levels(struct lp_build_sample_context *bld,
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unsigned texture_unit,
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LLVMValueRef lod_ipart,
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LLVMValueRef *lod_fpart_inout,
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LLVMValueRef *level0_out,
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LLVMValueRef *level1_out);
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LLVMValueRef
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lp_build_get_mipmap_level(struct lp_build_sample_context *bld,
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LLVMValueRef level);
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LLVMValueRef
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lp_build_get_mip_offsets(struct lp_build_sample_context *bld,
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LLVMValueRef level);
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void
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lp_build_mipmap_level_sizes(struct lp_build_sample_context *bld,
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LLVMValueRef ilevel,
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LLVMValueRef *out_size_vec,
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LLVMValueRef *row_stride_vec,
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LLVMValueRef *img_stride_vec);
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void
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lp_build_extract_image_sizes(struct lp_build_sample_context *bld,
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struct lp_build_context *size_bld,
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struct lp_type coord_type,
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LLVMValueRef size,
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LLVMValueRef *out_width,
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LLVMValueRef *out_height,
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LLVMValueRef *out_depth);
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void
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lp_build_unnormalized_coords(struct lp_build_sample_context *bld,
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LLVMValueRef flt_size,
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LLVMValueRef *s,
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LLVMValueRef *t,
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LLVMValueRef *r);
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void
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lp_build_cube_lookup(struct lp_build_sample_context *bld,
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LLVMValueRef *coords,
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const struct lp_derivatives *derivs_in, /* optional */
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LLVMValueRef *rho,
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struct lp_derivatives *derivs_out, /* optional */
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boolean need_derivs);
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void
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lp_build_cube_new_coords(struct lp_build_context *ivec_bld,
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LLVMValueRef face,
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LLVMValueRef x0,
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LLVMValueRef x1,
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LLVMValueRef y0,
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LLVMValueRef y1,
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LLVMValueRef max_coord,
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LLVMValueRef new_faces[4],
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LLVMValueRef new_xcoords[4][2],
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LLVMValueRef new_ycoords[4][2]);
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void
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lp_build_sample_partial_offset(struct lp_build_context *bld,
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unsigned block_length,
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LLVMValueRef coord,
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LLVMValueRef stride,
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LLVMValueRef *out_offset,
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LLVMValueRef *out_i);
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void
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lp_build_sample_offset(struct lp_build_context *bld,
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const struct util_format_description *format_desc,
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LLVMValueRef x,
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LLVMValueRef y,
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LLVMValueRef z,
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LLVMValueRef y_stride,
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LLVMValueRef z_stride,
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LLVMValueRef *out_offset,
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LLVMValueRef *out_i,
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LLVMValueRef *out_j);
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void
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lp_build_sample_soa(struct gallivm_state *gallivm,
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const struct lp_static_texture_state *static_texture_state,
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const struct lp_static_sampler_state *static_sampler_state,
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struct lp_sampler_dynamic_state *dynamic_texture_state,
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struct lp_type fp_type,
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boolean is_fetch,
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unsigned texture_index,
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unsigned sampler_index,
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const LLVMValueRef *coords,
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const LLVMValueRef *offsets,
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const struct lp_derivatives *derivs,
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LLVMValueRef lod_bias,
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LLVMValueRef explicit_lod,
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enum lp_sampler_lod_property lod_property,
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LLVMValueRef texel_out[4]);
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void
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lp_build_coord_repeat_npot_linear(struct lp_build_sample_context *bld,
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LLVMValueRef coord_f,
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LLVMValueRef length_i,
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LLVMValueRef length_f,
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LLVMValueRef *coord0_i,
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LLVMValueRef *weight_f);
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void
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lp_build_size_query_soa(struct gallivm_state *gallivm,
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const struct lp_static_texture_state *static_state,
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struct lp_sampler_dynamic_state *dynamic_state,
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struct lp_type int_type,
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unsigned texture_unit,
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unsigned target,
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boolean is_sviewinfo,
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enum lp_sampler_lod_property lod_property,
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LLVMValueRef explicit_lod,
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LLVMValueRef *sizes_out);
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void
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lp_build_sample_nop(struct gallivm_state *gallivm,
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struct lp_type type,
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const LLVMValueRef *coords,
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LLVMValueRef texel_out[4]);
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LLVMValueRef
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lp_build_minify(struct lp_build_context *bld,
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LLVMValueRef base_size,
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LLVMValueRef level,
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boolean lod_scalar);
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#endif /* LP_BLD_SAMPLE_H */
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