1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28 /*
29 * Authors:
30 * Keith Whitwell <keith@tungstengraphics.com>
31 */
32
33 #ifndef DRAW_PIPE_H
34 #define DRAW_PIPE_H
35
36 #include "pipe/p_compiler.h"
37 #include "draw_private.h" /* for sizeof(vertex_header) */
38
39
40 /**
41 * Basic info for a point/line/triangle primitive.
42 */
43 struct prim_header {
44 float det; /**< front/back face determinant */
45 ushort flags;
46 ushort pad;
47 struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */
48 };
49
50
51
52 /**
53 * Base class for all primitive drawing stages.
54 */
55 struct draw_stage
56 {
57 struct draw_context *draw; /**< parent context */
58
59 struct draw_stage *next; /**< next stage in pipeline */
60 const char *name; /**< for debugging */
61
62 struct vertex_header **tmp; /**< temp vert storage, such as for clipping */
63 unsigned nr_tmps;
64
65 void (*point)( struct draw_stage *,
66 struct prim_header * );
67
68 void (*line)( struct draw_stage *,
69 struct prim_header * );
70
71 void (*tri)( struct draw_stage *,
72 struct prim_header * );
73
74 void (*flush)( struct draw_stage *,
75 unsigned flags );
76
77 void (*reset_stipple_counter)( struct draw_stage * );
78
79 void (*destroy)( struct draw_stage * );
80 };
81
82
83 extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
84 extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
85 extern struct draw_stage *draw_offset_stage( struct draw_context *context );
86 extern struct draw_stage *draw_clip_stage( struct draw_context *context );
87 extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
88 extern struct draw_stage *draw_cull_stage( struct draw_context *context );
89 extern struct draw_stage *draw_stipple_stage( struct draw_context *context );
90 extern struct draw_stage *draw_wide_line_stage( struct draw_context *context );
91 extern struct draw_stage *draw_wide_point_stage( struct draw_context *context );
92 extern struct draw_stage *draw_validate_stage( struct draw_context *context );
93
94
95 extern void draw_free_temp_verts( struct draw_stage *stage );
96 extern boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr );
97
98 extern void draw_reset_vertex_ids( struct draw_context *draw );
99
100 void draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header);
101 void draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header);
102 void draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header);
103
104
105
106 /**
107 * Get a writeable copy of a vertex.
108 * \param stage drawing stage info
109 * \param vert the vertex to copy (source)
110 * \param idx index into stage's tmp[] array to put the copy (dest)
111 * \return pointer to the copied vertex
112 */
113 static INLINE struct vertex_header *
dup_vert(struct draw_stage * stage,const struct vertex_header * vert,unsigned idx)114 dup_vert( struct draw_stage *stage,
115 const struct vertex_header *vert,
116 unsigned idx )
117 {
118 struct vertex_header *tmp = stage->tmp[idx];
119 const uint vsize = sizeof(struct vertex_header)
120 + stage->draw->vs.num_vs_outputs * 4 * sizeof(float);
121 memcpy(tmp, vert, vsize);
122 tmp->vertex_id = UNDEFINED_VERTEX_ID;
123 return tmp;
124 }
125
126 #endif
127