diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_alpha.c')
-rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_alpha.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_alpha.c b/src/gallium/drivers/llvmpipe/lp_bld_alpha.c new file mode 100644 index 0000000000..a3faa22b99 --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_alpha.c @@ -0,0 +1,68 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * Alpha testing to LLVM IR translation. + * + * @author Jose Fonseca <jfonseca@vmware.com> + */ + +#include "pipe/p_state.h" + +#include "lp_bld_type.h" +#include "lp_bld_const.h" +#include "lp_bld_arit.h" +#include "lp_bld_logic.h" +#include "lp_bld_debug.h" +#include "lp_bld_alpha.h" + + +LLVMValueRef +lp_build_alpha_test(LLVMBuilderRef builder, + const struct pipe_alpha_state *state, + union lp_type type, + LLVMValueRef alpha, + LLVMValueRef mask) +{ + struct lp_build_context bld; + + lp_build_context_init(&bld, builder, type); + + if(state->enabled) { + LLVMValueRef ref = lp_build_const_uni(type, state->ref_value); + LLVMValueRef test = lp_build_cmp(&bld, state->func, alpha, ref); + + lp_build_name(test, "alpha_mask"); + + if(mask) + mask = LLVMBuildAnd(builder, mask, test, ""); + else + mask = test; + } + + return mask; +} |