18393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius/************************************************************************** 28393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 38393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * Copyright 2009 VMware, Inc. 48393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * All Rights Reserved. 58393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 68393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * Permission is hereby granted, free of charge, to any person obtaining a 78393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * copy of this software and associated documentation files (the 88393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * "Software"), to deal in the Software without restriction, including 98393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * without limitation the rights to use, copy, modify, merge, publish, 108393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * distribute, sub license, and/or sell copies of the Software, and to 118393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * permit persons to whom the Software is furnished to do so, subject to 128393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * the following conditions: 138393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 148393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * The above copyright notice and this permission notice (including the 158393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * next paragraph) shall be included in all copies or substantial portions 168393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * of the Software. 178393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 188393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 198393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 208393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 2159d709d503bab6e2b61931737e662dd293b40578ccornelius * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 2259d709d503bab6e2b61931737e662dd293b40578ccornelius * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 2359d709d503bab6e2b61931737e662dd293b40578ccornelius * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 248393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 2559d709d503bab6e2b61931737e662dd293b40578ccornelius * 268393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius **************************************************************************/ 2759d709d503bab6e2b61931737e662dd293b40578ccornelius 2859d709d503bab6e2b61931737e662dd293b40578ccornelius/** 298393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * Alpha testing to LLVM IR translation. 308393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 318393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @author Jose Fonseca <jfonseca@vmware.com> 328393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius */ 338393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 348393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "pipe/p_state.h" 358393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "util/u_format.h" 368393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 378393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "gallivm/lp_bld_type.h" 388393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "gallivm/lp_bld_const.h" 398393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "gallivm/lp_bld_arit.h" 4059d709d503bab6e2b61931737e662dd293b40578ccornelius#include "gallivm/lp_bld_conv.h" 4159d709d503bab6e2b61931737e662dd293b40578ccornelius#include "gallivm/lp_bld_logic.h" 428393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "gallivm/lp_bld_flow.h" 4359d709d503bab6e2b61931737e662dd293b40578ccornelius#include "gallivm/lp_bld_debug.h" 4459d709d503bab6e2b61931737e662dd293b40578ccornelius 4559d709d503bab6e2b61931737e662dd293b40578ccornelius#include "lp_bld_alpha.h" 468393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 478393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 488393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusvoid 498393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliuslp_build_alpha_test(struct gallivm_state *gallivm, 508393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius unsigned func, 518393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius struct lp_type type, 5259d709d503bab6e2b61931737e662dd293b40578ccornelius const struct util_format_description *cbuf_format_desc, 538393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius struct lp_build_mask_context *mask, 5459d709d503bab6e2b61931737e662dd293b40578ccornelius LLVMValueRef alpha, 558393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius LLVMValueRef ref, 568393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius boolean do_branch) 578393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius{ 588393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius struct lp_build_context bld; 5959d709d503bab6e2b61931737e662dd293b40578ccornelius LLVMValueRef test; 608393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 6159d709d503bab6e2b61931737e662dd293b40578ccornelius lp_build_context_init(&bld, gallivm, type); 628393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 638393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius /* 648393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * Alpha testing needs to be done in the color buffer precision. 658393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 668393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * TODO: Ideally, instead of duplicating the color conversion code, we would do 678393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * alpha testing after converting the output colors, but that's not very 688393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * convenient, because it needs to be done before depth testing. Hopefully 698393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * LLVM will detect and remove the duplicate expression. 708393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 718393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * FIXME: This should be generalized to formats other than rgba8 variants. 728393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius */ 738393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (type.floating && 748393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius util_format_is_rgba8_variant(cbuf_format_desc)) { 758393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius const unsigned dst_width = 8; 7659d709d503bab6e2b61931737e662dd293b40578ccornelius 778393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius alpha = lp_build_clamp(&bld, alpha, bld.zero, bld.one); 788393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius ref = lp_build_clamp(&bld, ref, bld.zero, bld.one); 7959d709d503bab6e2b61931737e662dd293b40578ccornelius 8059d709d503bab6e2b61931737e662dd293b40578ccornelius alpha = lp_build_clamped_float_to_unsigned_norm(gallivm, type, dst_width, alpha); 8159d709d503bab6e2b61931737e662dd293b40578ccornelius ref = lp_build_clamped_float_to_unsigned_norm(gallivm, type, dst_width, ref); 8259d709d503bab6e2b61931737e662dd293b40578ccornelius 838393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius type.floating = 0; 848393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius lp_build_context_init(&bld, gallivm, type); 858393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 868393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 878393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius test = lp_build_cmp(&bld, func, alpha, ref); 8859d709d503bab6e2b61931737e662dd293b40578ccornelius 8959d709d503bab6e2b61931737e662dd293b40578ccornelius lp_build_name(test, "alpha_mask"); 9059d709d503bab6e2b61931737e662dd293b40578ccornelius 918393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius lp_build_mask_update(mask, test); 9259d709d503bab6e2b61931737e662dd293b40578ccornelius 938393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (do_branch) 948393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius lp_build_mask_check(mask); 958393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius} 968393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius