| /************************************************************************** |
| * |
| * 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 |
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| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /** |
| * @file |
| * Position and shader input interpolation. |
| * |
| * Special attention is given to the interpolation of side by side quads. |
| * Multiplications are made only for the first quad. Interpolation of |
| * inputs for posterior quads are done exclusively with additions, and |
| * perspective divide if necessary. |
| * |
| * @author Jose Fonseca <jfonseca@vmware.com> |
| */ |
| |
| #ifndef LP_BLD_INTERP_H |
| #define LP_BLD_INTERP_H |
| |
| |
| #include <llvm-c/Core.h> |
| |
| #include "tgsi/tgsi_exec.h" |
| |
| #include "lp_bld_type.h" |
| |
| |
| struct tgsi_token; |
| |
| |
| struct lp_build_interp_soa_context |
| { |
| struct lp_build_context base; |
| |
| unsigned num_attribs; |
| unsigned mask[1 + PIPE_MAX_SHADER_INPUTS]; |
| unsigned mode[1 + PIPE_MAX_SHADER_INPUTS]; |
| |
| LLVMValueRef a0 [1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; |
| LLVMValueRef dadx[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; |
| LLVMValueRef dady[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; |
| |
| /* Attribute values before perspective divide */ |
| LLVMValueRef attribs_pre[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; |
| |
| LLVMValueRef attribs[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; |
| |
| /* |
| * Convenience pointers. Callers may access this one. |
| */ |
| const LLVMValueRef *pos; |
| const LLVMValueRef (*inputs)[NUM_CHANNELS]; |
| }; |
| |
| |
| void |
| lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld, |
| const struct tgsi_token *tokens, |
| boolean flatshade, |
| LLVMBuilderRef builder, |
| struct lp_type type, |
| LLVMValueRef a0_ptr, |
| LLVMValueRef dadx_ptr, |
| LLVMValueRef dady_ptr, |
| LLVMValueRef x0, |
| LLVMValueRef y0); |
| |
| void |
| lp_build_interp_soa_update(struct lp_build_interp_soa_context *bld, |
| int quad_index); |
| |
| |
| #endif /* LP_BLD_INTERP_H */ |