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/*
* Copyright 2019 Advanced Micro Devices, Inc.
*
* 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 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
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
#ifndef AC_LLVM_CULL_H
#define AC_LLVM_CULL_H
#include "ac_llvm_build.h"
struct ac_cull_options {
/* In general, I recommend setting all to true except view Z culling,
* which isn't so effective because W culling is cheaper and partially
* replaces near Z culling, and you don't need to set Position.z
* if Z culling is disabled.
*
* If something doesn't work, turn some of these off to find out what.
*/
bool cull_front;
bool cull_back;
bool cull_view_xy;
bool cull_view_near_z;
bool cull_view_far_z;
bool cull_small_prims;
bool cull_zero_area;
bool cull_w; /* cull primitives with all W < 0 */
bool use_halfz_clip_space;
};
LLVMValueRef ac_cull_triangle(struct ac_llvm_context *ctx,
LLVMValueRef pos[3][4],
LLVMValueRef initially_accepted,
LLVMValueRef vp_scale[2],
LLVMValueRef vp_translate[2],
LLVMValueRef small_prim_precision,
struct ac_cull_options *options);
#endif
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