121 lines
4.2 KiB
C
121 lines
4.2 KiB
C
/**************************************************************************
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*
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* Copyright 2012 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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#include "lp_bld_const.h"
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#include "lp_bld_struct.h"
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#include "lp_bld_format.h"
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#include "lp_bld_debug.h"
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#include "lp_bld_type.h"
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#include "lp_bld_conv.h"
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#include "lp_bld_pack.h"
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#include "lp_bld_intr.h"
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#include "lp_bld_gather.h"
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#include "util/u_memory.h"
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#include "util/format/u_format.h"
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#include "pipe/p_state.h"
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/**
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* @brief lp_build_fetch_rgba_aos_array
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*
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* \param format_desc describes format of the image we're fetching from
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* \param dst_type output type
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* \param base_ptr address of the pixel block (or the texel if uncompressed)
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* \param offset ptr offset
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*/
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LLVMValueRef
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lp_build_fetch_rgba_aos_array(struct gallivm_state *gallivm,
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const struct util_format_description *format_desc,
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struct lp_type dst_type,
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LLVMValueRef base_ptr,
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LLVMValueRef offset)
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{
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struct lp_build_context bld;
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LLVMBuilderRef builder = gallivm->builder;
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LLVMTypeRef src_vec_type;
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LLVMValueRef ptr, res = NULL;
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struct lp_type src_type;
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boolean pure_integer = format_desc->channel[0].pure_integer;
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struct lp_type tmp_type;
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lp_type_from_format_desc(&src_type, format_desc);
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assert(src_type.length <= dst_type.length);
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src_vec_type = lp_build_vec_type(gallivm, src_type);
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/*
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* Read whole vector from memory, unaligned.
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* XXX: Note it's actually aligned to element type. Not sure if all
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* callers are able to guarantee that (whereas for others, we should
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* be able to use full alignment when there's 2 or 4 channels).
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* (If all callers can guarantee element type alignment, we should
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* relax alignment restrictions elsewhere.)
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*/
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ptr = LLVMBuildGEP(builder, base_ptr, &offset, 1, "");
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ptr = LLVMBuildPointerCast(builder, ptr, LLVMPointerType(src_vec_type, 0), "");
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res = LLVMBuildLoad(builder, ptr, "");
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LLVMSetAlignment(res, src_type.width / 8);
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/* Truncate doubles to float */
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if (src_type.floating && src_type.width == 64) {
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src_type.width = 32;
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src_vec_type = lp_build_vec_type(gallivm, src_type);
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res = LLVMBuildFPTrunc(builder, res, src_vec_type, "");
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}
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/* Expand to correct length */
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if (src_type.length < dst_type.length) {
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res = lp_build_pad_vector(gallivm, res, dst_type.length);
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src_type.length = dst_type.length;
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}
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tmp_type = dst_type;
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if (pure_integer) {
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/* some callers expect (fake) floats other real ints. */
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tmp_type.floating = 0;
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tmp_type.sign = src_type.sign;
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}
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/* Convert to correct format */
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lp_build_conv(gallivm, src_type, tmp_type, &res, 1, &res, 1);
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/* Swizzle it */
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lp_build_context_init(&bld, gallivm, tmp_type);
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res = lp_build_format_swizzle_aos(format_desc, &bld, res);
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/* Bitcast to floats (for pure integers) when requested */
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if (pure_integer && dst_type.floating) {
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res = LLVMBuildBitCast(builder, res, lp_build_vec_type(gallivm, dst_type), "");
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}
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return res;
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}
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