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26 #ifndef AC_LLVM_CULL_H
27 #define AC_LLVM_CULL_H
29 #include "ac_llvm_build.h"
31 struct ac_cull_options
{
32 /* In general, I recommend setting all to true except view Z culling,
33 * which isn't so effective because W culling is cheaper and partially
34 * replaces near Z culling, and you don't need to set Position.z
35 * if Z culling is disabled.
37 * If something doesn't work, turn some of these off to find out what.
42 bool cull_view_near_z
;
44 bool cull_small_prims
;
46 bool cull_w
; /* cull primitives with all W < 0 */
48 bool use_halfz_clip_space
;
51 LLVMValueRef
ac_cull_triangle(struct ac_llvm_context
*ctx
,
52 LLVMValueRef pos
[3][4],
53 LLVMValueRef initially_accepted
,
54 LLVMValueRef vp_scale
[2],
55 LLVMValueRef vp_translate
[2],
56 LLVMValueRef small_prim_precision
,
57 struct ac_cull_options
*options
);