64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/*
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* Copyright 2019 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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*/
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#ifndef AC_LLVM_CULL_H
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#define AC_LLVM_CULL_H
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#include "ac_llvm_build.h"
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struct ac_cull_options {
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/* In general, I recommend setting all to true except view Z culling,
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* which isn't so effective because W culling is cheaper and partially
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* replaces near Z culling, and you don't need to set Position.z
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* if Z culling is disabled.
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*
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* If something doesn't work, turn some of these off to find out what.
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*/
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bool cull_front;
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bool cull_back;
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bool cull_view_xy;
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bool cull_view_near_z;
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bool cull_view_far_z;
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bool cull_small_prims;
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bool cull_zero_area;
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bool cull_w; /* cull primitives with all W < 0 */
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bool use_halfz_clip_space;
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uint8_t num_vertices; /* 1..3 */
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};
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/* Callback invoked in the inner-most branch where the primitive is accepted. */
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typedef void (*ac_cull_accept_func)(struct ac_llvm_context *ctx, LLVMValueRef accepted,
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void *userdata);
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void ac_cull_primitive(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4],
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LLVMValueRef initially_accepted, LLVMValueRef vp_scale[2],
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LLVMValueRef vp_translate[2], LLVMValueRef small_prim_precision,
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LLVMValueRef clip_half_line_width[2], struct ac_cull_options *options,
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ac_cull_accept_func accept_func, void *userdata);
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#endif
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