171 lines
4.7 KiB
C
171 lines
4.7 KiB
C
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/*
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Copyright (C) Intel Corp. 2006. All Rights Reserved.
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Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
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develop this 3D driver.
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Permission is hereby granted, free of charge, to any person obtaining
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a 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, sublicense, 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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The above copyright notice and this permission notice (including the
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next paragraph) shall be included in all copies or substantial
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portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**********************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#ifndef BRW_CLIP_H
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#define BRW_CLIP_H
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#include "brw_context.h"
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#include "brw_eu.h"
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#define MAX_VERTS (3+6+6)
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/* Note that if unfilled primitives are being emitted, we have to fix
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* up polygon offset and flatshading at this point:
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*/
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struct brw_clip_prog_key {
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GLuint attrs:16;
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GLuint primitive:4;
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GLuint nr_userclip:3;
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GLuint do_flat_shading:1;
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GLuint do_unfilled:1;
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GLuint fill_cw:2; /* includes cull information */
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GLuint fill_ccw:2; /* includes cull information */
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GLuint offset_cw:1;
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GLuint offset_ccw:1;
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GLuint pad0:1;
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GLuint copy_bfc_cw:1;
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GLuint copy_bfc_ccw:1;
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GLuint clip_mode:3;
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GLuint pad1:27;
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GLfloat offset_factor;
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GLfloat offset_units;
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};
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#define CLIP_LINE 0
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#define CLIP_POINT 1
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#define CLIP_FILL 2
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#define CLIP_CULL 3
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#define PRIM_MASK (0x1f)
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struct brw_clip_compile {
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struct brw_compile func;
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struct brw_clip_prog_key key;
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struct brw_clip_prog_data prog_data;
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struct {
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struct brw_reg R0;
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struct brw_reg vertex[MAX_VERTS];
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struct brw_reg t;
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struct brw_reg t0, t1;
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struct brw_reg dp0, dp1;
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struct brw_reg dpPrev;
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struct brw_reg dp;
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struct brw_reg loopcount;
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struct brw_reg nr_verts;
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struct brw_reg planemask;
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struct brw_reg inlist;
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struct brw_reg outlist;
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struct brw_reg freelist;
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struct brw_reg dir;
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struct brw_reg tmp0, tmp1;
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struct brw_reg offset;
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struct brw_reg fixed_planes;
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struct brw_reg plane_equation;
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} reg;
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/* 3 different ways of expressing vertex size:
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*/
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GLuint nr_attrs;
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GLuint nr_regs;
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GLuint nr_bytes;
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GLuint first_tmp;
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GLuint last_tmp;
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GLboolean need_direction;
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GLuint last_mrf;
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GLuint header_position_offset;
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GLuint offset[BRW_ATTRIB_MAX];
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};
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#define ATTR_SIZE (4*4)
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/* Points are only culled, so no need for a clip routine, however it
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* works out easier to have a dummy one.
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*/
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void brw_emit_unfilled_clip( struct brw_clip_compile *c );
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void brw_emit_tri_clip( struct brw_clip_compile *c );
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void brw_emit_line_clip( struct brw_clip_compile *c );
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void brw_emit_point_clip( struct brw_clip_compile *c );
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/* brw_clip_tri.c, for use by the unfilled clip routine:
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*/
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void brw_clip_tri_init_vertices( struct brw_clip_compile *c );
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void brw_clip_tri_flat_shade( struct brw_clip_compile *c );
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void brw_clip_tri( struct brw_clip_compile *c );
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void brw_clip_tri_emit_polygon( struct brw_clip_compile *c );
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void brw_clip_tri_alloc_regs( struct brw_clip_compile *c,
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GLuint nr_verts );
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/* Utils:
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*/
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void brw_clip_interp_vertex( struct brw_clip_compile *c,
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struct brw_indirect dest_ptr,
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struct brw_indirect v0_ptr, /* from */
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struct brw_indirect v1_ptr, /* to */
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struct brw_reg t0,
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GLboolean force_edgeflag );
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void brw_clip_init_planes( struct brw_clip_compile *c );
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void brw_clip_emit_vue(struct brw_clip_compile *c,
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struct brw_indirect vert,
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GLboolean allocate,
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GLboolean eot,
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GLuint header);
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void brw_clip_kill_thread(struct brw_clip_compile *c);
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struct brw_reg brw_clip_plane_stride( struct brw_clip_compile *c );
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struct brw_reg brw_clip_plane0_address( struct brw_clip_compile *c );
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void brw_clip_copy_colors( struct brw_clip_compile *c,
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GLuint to, GLuint from );
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void brw_clip_init_clipmask( struct brw_clip_compile *c );
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#endif
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