19ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca/************************************************************************** 29ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 39ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * Copyright 2009 VMware, Inc. 49ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * All Rights Reserved. 59ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 69ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * Permission is hereby granted, free of charge, to any person obtaining a 79ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * copy of this software and associated documentation files (the 89ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * "Software"), to deal in the Software without restriction, including 99ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * without limitation the rights to use, copy, modify, merge, publish, 109ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * distribute, sub license, and/or sell copies of the Software, and to 119ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * permit persons to whom the Software is furnished to do so, subject to 129ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * the following conditions: 139ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 149ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * The above copyright notice and this permission notice (including the 159ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * next paragraph) shall be included in all copies or substantial portions 169ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * of the Software. 179ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 189ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 199ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 209ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 219ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 229ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 239ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 249ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 259ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 269ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca **************************************************************************/ 279ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 289ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca/** 299ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * Alpha testing to LLVM IR translation. 309ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * 319ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca * @author Jose Fonseca <jfonseca@vmware.com> 329ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca */ 339ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 349ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca#include "pipe/p_state.h" 357a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca#include "util/u_format.h" 369ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 377a05161278531db97212c704a2f0258adb7d3324Brian Paul#include "gallivm/lp_bld_type.h" 387a05161278531db97212c704a2f0258adb7d3324Brian Paul#include "gallivm/lp_bld_const.h" 397a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca#include "gallivm/lp_bld_arit.h" 407a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca#include "gallivm/lp_bld_conv.h" 417a05161278531db97212c704a2f0258adb7d3324Brian Paul#include "gallivm/lp_bld_logic.h" 427a05161278531db97212c704a2f0258adb7d3324Brian Paul#include "gallivm/lp_bld_flow.h" 437a05161278531db97212c704a2f0258adb7d3324Brian Paul#include "gallivm/lp_bld_debug.h" 447a05161278531db97212c704a2f0258adb7d3324Brian Paul 459ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca#include "lp_bld_alpha.h" 469ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 479ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 48c0472f9c34da78bccecb2c790b54b9dd9712a0b9José Fonsecavoid 49efc82aef35a2aac5d2ed9774f6d28f2626796416Brian Paullp_build_alpha_test(struct gallivm_state *gallivm, 50277d768d10d8a98a7cae8b709ff78bb8d1f695f1José Fonseca unsigned func, 51b4835ea03d64261da5a892f9590c9977b06920e8José Fonseca struct lp_type type, 527a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca const struct util_format_description *cbuf_format_desc, 533d7a88674f9eb3320eeff511968f041426e25023José Fonseca struct lp_build_mask_context *mask, 54635c37e118bbf51fc8c93a2c999281ee817a93e1José Fonseca LLVMValueRef alpha, 55aa4cb5e2d8d48c7dcc9653c61a9e25494e3e7b2aKeith Whitwell LLVMValueRef ref, 56aa4cb5e2d8d48c7dcc9653c61a9e25494e3e7b2aKeith Whitwell boolean do_branch) 579ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca{ 589ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca struct lp_build_context bld; 59277d768d10d8a98a7cae8b709ff78bb8d1f695f1José Fonseca LLVMValueRef test; 609ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 61efc82aef35a2aac5d2ed9774f6d28f2626796416Brian Paul lp_build_context_init(&bld, gallivm, type); 629ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 637a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca /* 647a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * Alpha testing needs to be done in the color buffer precision. 657a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * 667a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * TODO: Ideally, instead of duplicating the color conversion code, we would do 677a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * alpha testing after converting the output colors, but that's not very 687a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * convenient, because it needs to be done before depth testing. Hopefully 697a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * LLVM will detect and remove the duplicate expression. 707a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * 717a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca * FIXME: This should be generalized to formats other than rgba8 variants. 727a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca */ 737a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca if (type.floating && 747a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca util_format_is_rgba8_variant(cbuf_format_desc)) { 757a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca const unsigned dst_width = 8; 767a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca 777a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca alpha = lp_build_clamp(&bld, alpha, bld.zero, bld.one); 787a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca ref = lp_build_clamp(&bld, ref, bld.zero, bld.one); 797a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca 807a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca alpha = lp_build_clamped_float_to_unsigned_norm(gallivm, type, dst_width, alpha); 817a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca ref = lp_build_clamped_float_to_unsigned_norm(gallivm, type, dst_width, ref); 827a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca 837a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca type.floating = 0; 847a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca lp_build_context_init(&bld, gallivm, type); 857a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca } 867a75e7d6e85d27e102ff7e15583c33b1ce282fe4José Fonseca 87277d768d10d8a98a7cae8b709ff78bb8d1f695f1José Fonseca test = lp_build_cmp(&bld, func, alpha, ref); 889ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 89277d768d10d8a98a7cae8b709ff78bb8d1f695f1José Fonseca lp_build_name(test, "alpha_mask"); 909ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca 91277d768d10d8a98a7cae8b709ff78bb8d1f695f1José Fonseca lp_build_mask_update(mask, test); 92aa4cb5e2d8d48c7dcc9653c61a9e25494e3e7b2aKeith Whitwell 93aa4cb5e2d8d48c7dcc9653c61a9e25494e3e7b2aKeith Whitwell if (do_branch) 94aa4cb5e2d8d48c7dcc9653c61a9e25494e3e7b2aKeith Whitwell lp_build_mask_check(mask); 959ae47069b4a2b67e381b02d805f1ca74f31ea7b8José Fonseca} 96