1 /************************************************************************** 2 * 3 * Copyright 2012 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #include "lp_bld_const.h" 29 #include "lp_bld_struct.h" 30 #include "lp_bld_format.h" 31 #include "lp_bld_debug.h" 32 #include "lp_bld_type.h" 33 #include "lp_bld_conv.h" 34 #include "lp_bld_pack.h" 35 36 #include "util/u_memory.h" 37 #include "util/u_format.h" 38 #include "pipe/p_state.h" 39 40 /** 41 * @brief lp_build_fetch_rgba_aos_array 42 * 43 * \param format_desc describes format of the image we're fetching from 44 * \param dst_type output type 45 * \param base_ptr address of the pixel block (or the texel if uncompressed) 46 * \param offset ptr offset 47 */ 48 LLVMValueRef 49 lp_build_fetch_rgba_aos_array(struct gallivm_state *gallivm, 50 const struct util_format_description *format_desc, 51 struct lp_type dst_type, 52 LLVMValueRef base_ptr, 53 LLVMValueRef offset) 54 { 55 struct lp_build_context bld; 56 LLVMBuilderRef builder = gallivm->builder; 57 LLVMTypeRef src_vec_type; 58 LLVMValueRef ptr, res = NULL; 59 struct lp_type src_type; 60 61 memset(&src_type, 0, sizeof src_type); 62 src_type.floating = format_desc->channel[0].type == UTIL_FORMAT_TYPE_FLOAT; 63 src_type.fixed = format_desc->channel[0].type == UTIL_FORMAT_TYPE_FIXED; 64 src_type.sign = format_desc->channel[0].type != UTIL_FORMAT_TYPE_UNSIGNED; 65 src_type.norm = format_desc->channel[0].normalized; 66 src_type.width = format_desc->channel[0].size; 67 src_type.length = format_desc->nr_channels; 68 69 assert(src_type.length <= dst_type.length); 70 71 src_vec_type = lp_build_vec_type(gallivm, src_type); 72 73 /* Read whole vector from memory, unaligned */ 74 if (!res) { 75 ptr = LLVMBuildGEP(builder, base_ptr, &offset, 1, ""); 76 ptr = LLVMBuildPointerCast(builder, ptr, LLVMPointerType(src_vec_type, 0), ""); 77 res = LLVMBuildLoad(builder, ptr, ""); 78 lp_set_load_alignment(res, src_type.width / 8); 79 } 80 81 /* Truncate doubles to float */ 82 if (src_type.floating && src_type.width == 64) { 83 src_type.width = 32; 84 src_vec_type = lp_build_vec_type(gallivm, src_type); 85 86 res = LLVMBuildFPTrunc(builder, res, src_vec_type, ""); 87 } 88 89 /* Expand to correct length */ 90 if (src_type.length < dst_type.length) { 91 res = lp_build_pad_vector(gallivm, res, src_type, dst_type.length); 92 src_type.length = dst_type.length; 93 } 94 95 /* Convert to correct format */ 96 lp_build_conv(gallivm, src_type, dst_type, &res, 1, &res, 1); 97 98 /* Swizzle it */ 99 lp_build_context_init(&bld, gallivm, dst_type); 100 return lp_build_format_swizzle_aos(format_desc, &bld, res); 101 } 102
