lp_bld_alpha.c revision 77b35dc179473afbbd8c709c9f32c0f537c90776
1/************************************************************************** 2 * 3 * Copyright 2009 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/** 29 * Alpha testing to LLVM IR translation. 30 * 31 * @author Jose Fonseca <jfonseca@vmware.com> 32 */ 33 34#include "pipe/p_state.h" 35 36#include "lp_bld_type.h" 37#include "lp_bld_const.h" 38#include "lp_bld_arit.h" 39#include "lp_bld_logic.h" 40#include "lp_bld_flow.h" 41#include "lp_bld_debug.h" 42#include "lp_bld_alpha.h" 43 44 45void 46lp_build_alpha_test(LLVMBuilderRef builder, 47 const struct pipe_alpha_state *state, 48 union lp_type type, 49 struct lp_build_mask_context *mask, 50 LLVMValueRef alpha) 51{ 52 struct lp_build_context bld; 53 54 lp_build_context_init(&bld, builder, type); 55 56 if(state->enabled) { 57 LLVMValueRef ref = lp_build_const_scalar(type, state->ref_value); 58 LLVMValueRef test = lp_build_cmp(&bld, state->func, alpha, ref); 59 60 lp_build_name(test, "alpha_mask"); 61 62 lp_build_mask_update(mask, test); 63 } 64} 65