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Diffstat (limited to 'src/intel/compiler/brw_clip.h')
| -rw-r--r-- | src/intel/compiler/brw_clip.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_clip.h b/src/intel/compiler/brw_clip.h new file mode 100644 index 00000000000..bdf7ee25848 --- /dev/null +++ b/src/intel/compiler/brw_clip.h @@ -0,0 +1,163 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics to + develop this 3D driver. + + 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, sublicense, 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 NONINFRINGEMENT. + IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <[email protected]> + */ + +#ifndef BRW_CLIP_H +#define BRW_CLIP_H + +#include "brw_compiler.h" +#include "brw_eu.h" + +/* Initial 3 verts, plus at most 6 additional verts from intersections + * with fixed planes, plus at most 8 additional verts from intersections + * with user clip planes + */ +#define MAX_VERTS (3+6+8) + +#define PRIM_MASK (0x1f) + +struct brw_clip_compile { + struct brw_codegen func; + struct brw_clip_prog_key key; + struct brw_clip_prog_data prog_data; + + struct { + struct brw_reg R0; + struct brw_reg vertex[MAX_VERTS]; + + struct brw_reg t; + struct brw_reg t0, t1; + struct brw_reg dp0, dp1; + + struct brw_reg dpPrev; + struct brw_reg dp; + struct brw_reg loopcount; + struct brw_reg nr_verts; + struct brw_reg planemask; + + struct brw_reg inlist; + struct brw_reg outlist; + struct brw_reg freelist; + + struct brw_reg dir; + struct brw_reg tmp0, tmp1; + struct brw_reg offset; + + struct brw_reg fixed_planes; + struct brw_reg plane_equation; + + struct brw_reg ff_sync; + + /* Bitmask indicating which coordinate attribute should be used for + * comparison to each clipping plane. A 0 indicates that VARYING_SLOT_POS + * should be used, because it's one of the fixed +/- x/y/z planes that + * constitute the bounds of the view volume. A 1 indicates that + * VARYING_SLOT_CLIP_VERTEX should be used (if available) since it's a user- + * defined clipping plane. + */ + struct brw_reg vertex_src_mask; + + /* Offset into the vertex of the current plane's clipdistance value */ + struct brw_reg clipdistance_offset; + } reg; + + /* Number of registers storing VUE data */ + GLuint nr_regs; + + GLuint first_tmp; + GLuint last_tmp; + + bool need_direction; + + struct brw_vue_map vue_map; +}; + +/** + * True if the given varying is one of the outputs of the vertex shader. + */ +static inline bool brw_clip_have_varying(struct brw_clip_compile *c, + GLuint varying) +{ + return (c->key.attrs & BITFIELD64_BIT(varying)) ? 1 : 0; +} + +/* Points are only culled, so no need for a clip routine, however it + * works out easier to have a dummy one. + */ +void brw_emit_unfilled_clip( struct brw_clip_compile *c ); +void brw_emit_tri_clip( struct brw_clip_compile *c ); +void brw_emit_line_clip( struct brw_clip_compile *c ); +void brw_emit_point_clip( struct brw_clip_compile *c ); + +/* brw_clip_tri.c, for use by the unfilled clip routine: + */ +void brw_clip_tri_init_vertices( struct brw_clip_compile *c ); +void brw_clip_tri_flat_shade( struct brw_clip_compile *c ); +void brw_clip_tri( struct brw_clip_compile *c ); +void brw_clip_tri_emit_polygon( struct brw_clip_compile *c ); +void brw_clip_tri_alloc_regs( struct brw_clip_compile *c, + GLuint nr_verts ); + + +/* Utils: + */ + +void brw_clip_interp_vertex( struct brw_clip_compile *c, + struct brw_indirect dest_ptr, + struct brw_indirect v0_ptr, /* from */ + struct brw_indirect v1_ptr, /* to */ + struct brw_reg t0, + bool force_edgeflag ); + +void brw_clip_init_planes( struct brw_clip_compile *c ); + +void brw_clip_emit_vue(struct brw_clip_compile *c, + struct brw_indirect vert, + enum brw_urb_write_flags flags, + GLuint header); + +void brw_clip_kill_thread(struct brw_clip_compile *c); + +struct brw_reg brw_clip_plane_stride( struct brw_clip_compile *c ); +struct brw_reg brw_clip_plane0_address( struct brw_clip_compile *c ); + +void brw_clip_copy_flatshaded_attributes( struct brw_clip_compile *c, + GLuint to, GLuint from ); + +void brw_clip_init_clipmask( struct brw_clip_compile *c ); + +struct brw_reg get_tmp( struct brw_clip_compile *c ); + +void brw_clip_project_position(struct brw_clip_compile *c, + struct brw_reg pos ); +void brw_clip_ff_sync(struct brw_clip_compile *c); +void brw_clip_init_ff_sync(struct brw_clip_compile *c); + +#endif |