1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
36 #include "pipe/p_compiler.h"
38 typedef unsigned (*pt_elt_func
)( const void *elts
, unsigned idx
);
40 struct draw_pt_middle_end
;
45 #define PT_CLIPTEST 0x2
46 #define PT_PIPELINE 0x4
47 #define PT_MAX_MIDDLE 0x8
50 /* The "front end" - prepare sets of fetch, draw elements for the
53 * Currenly one version of this:
54 * - vcache - catchall implementation, decomposes to TRI/LINE/POINT prims
56 * - varray, varray_split
57 * - velement, velement_split
59 * Currenly only using the vcache version.
61 struct draw_pt_front_end
{
62 void (*prepare
)( struct draw_pt_front_end
*,
64 struct draw_pt_middle_end
*,
67 void (*run
)( struct draw_pt_front_end
*,
72 void (*finish
)( struct draw_pt_front_end
* );
73 void (*destroy
)( struct draw_pt_front_end
* );
77 /* The "middle end" - prepares actual hardware vertices for the
80 * Currently two versions of this:
81 * - fetch, vertex shade, cliptest, prim-pipeline
82 * - fetch, emit (ie passthrough)
84 struct draw_pt_middle_end
{
85 void (*prepare
)( struct draw_pt_middle_end
*,
88 unsigned *max_vertices
);
90 void (*run
)( struct draw_pt_middle_end
*,
91 const unsigned *fetch_elts
,
93 const ushort
*draw_elts
,
94 unsigned draw_count
);
96 void (*run_linear
)(struct draw_pt_middle_end
*,
100 /* Transform all vertices in a linear range and then draw them with
101 * the supplied element list. May fail and return FALSE.
103 boolean (*run_linear_elts
)( struct draw_pt_middle_end
*,
104 unsigned fetch_start
,
105 unsigned fetch_count
,
106 const ushort
*draw_elts
,
107 unsigned draw_count
);
109 int (*get_max_vertex_count
)( struct draw_pt_middle_end
* );
111 void (*finish
)( struct draw_pt_middle_end
* );
112 void (*destroy
)( struct draw_pt_middle_end
* );
116 /* The "back end" - supplied by the driver, defined in draw_vbuf.h.
119 struct vertex_header
;
124 pt_elt_func
draw_pt_elt_func( struct draw_context
*draw
);
125 const void *draw_pt_elt_ptr( struct draw_context
*draw
,
130 * Currently only the general-purpose vcache implementation, could add
131 * a special case for tiny vertex buffers.
133 struct draw_pt_front_end
*draw_pt_vcache( struct draw_context
*draw
);
134 struct draw_pt_front_end
*draw_pt_varray(struct draw_context
*draw
);
139 * Currently one general-purpose case which can do all possibilities,
140 * at the slight expense of creating a vertex_header in some cases
143 * The special case fetch_emit code avoids pipeline vertices
144 * altogether and builds hardware vertices directly from API
147 struct draw_pt_middle_end
*draw_pt_fetch_emit( struct draw_context
*draw
);
148 struct draw_pt_middle_end
*draw_pt_middle_fse( struct draw_context
*draw
);
149 struct draw_pt_middle_end
*draw_pt_fetch_pipeline_or_emit(struct draw_context
*draw
);
154 boolean
draw_pt_get_edgeflag( struct draw_context
*draw
,
158 /*******************************************************************************
163 void draw_pt_emit_prepare( struct pt_emit
*emit
,
165 unsigned *max_vertices
);
167 void draw_pt_emit( struct pt_emit
*emit
,
168 const float (*vertex_data
)[4],
169 unsigned vertex_count
,
174 void draw_pt_emit_linear( struct pt_emit
*emit
,
175 const float (*vertex_data
)[4],
176 unsigned vertex_count
,
181 void draw_pt_emit_destroy( struct pt_emit
*emit
);
183 struct pt_emit
*draw_pt_emit_create( struct draw_context
*draw
);
186 /*******************************************************************************
191 void draw_pt_fetch_prepare( struct pt_fetch
*fetch
,
192 unsigned vertex_size
);
194 void draw_pt_fetch_run( struct pt_fetch
*fetch
,
195 const unsigned *elts
,
199 void draw_pt_fetch_run_linear( struct pt_fetch
*fetch
,
204 void draw_pt_fetch_destroy( struct pt_fetch
*fetch
);
206 struct pt_fetch
*draw_pt_fetch_create( struct draw_context
*draw
);
208 /*******************************************************************************
209 * Post-VS: cliptest, rhw, viewport
213 boolean
draw_pt_post_vs_run( struct pt_post_vs
*pvs
,
214 struct vertex_header
*pipeline_verts
,
218 void draw_pt_post_vs_prepare( struct pt_post_vs
*pvs
,
219 boolean bypass_clipping
,
220 boolean identity_viewport
,
223 struct pt_post_vs
*draw_pt_post_vs_create( struct draw_context
*draw
);
225 void draw_pt_post_vs_destroy( struct pt_post_vs
*pvs
);
228 /*******************************************************************************
231 void draw_pt_split_prim(unsigned prim
, unsigned *first
, unsigned *incr
);
232 unsigned draw_pt_reduced_prim(unsigned prim
);