1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 <keithw@vmware.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 #include "draw_context.h"
39
40
41 /**
42 * Basic info for a point/line/triangle primitive.
43 */
44 struct prim_header {
45 float det; /**< front/back face determinant */
46 ushort flags;
47 ushort pad;
48 struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */
49 };
50
51
52
53 /**
54 * Base class for all primitive drawing stages.
55 */
56 struct draw_stage
57 {
58 struct draw_context *draw; /**< parent context */
59
60 struct draw_stage *next; /**< next stage in pipeline */
61 const char *name; /**< for debugging */
62
63 struct vertex_header **tmp; /**< temp vert storage, such as for clipping */
64 unsigned nr_tmps;
65
66 void (*point)( struct draw_stage *,
67 struct prim_header * );
68
69 void (*line)( struct draw_stage *,
70 struct prim_header * );
71
72 void (*tri)( struct draw_stage *,
73 struct prim_header * );
74
75 void (*flush)( struct draw_stage *,
76 unsigned flags );
77
78 void (*reset_stipple_counter)( struct draw_stage * );
79
80 void (*destroy)( struct draw_stage * );
81 };
82
83
84 extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
85 extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
86 extern struct draw_stage *draw_offset_stage( struct draw_context *context );
87 extern struct draw_stage *draw_clip_stage( struct draw_context *context );
88 extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
89 extern struct draw_stage *draw_cull_stage( struct draw_context *context );
90 extern struct draw_stage *draw_user_cull_stage( struct draw_context *draw );
91 extern struct draw_stage *draw_stipple_stage( struct draw_context *context );
92 extern struct draw_stage *draw_wide_line_stage( struct draw_context *context );
93 extern struct draw_stage *draw_wide_point_stage( struct draw_context *context );
94 extern struct draw_stage *draw_validate_stage( struct draw_context *context );
95
96 extern void draw_free_temp_verts( struct draw_stage *stage );
97 extern boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr );
98
99 extern void draw_reset_vertex_ids( struct draw_context *draw );
100
101 void draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header);
102 void draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header);
103 void draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header);
104
105 void draw_aapoint_prepare_outputs(struct draw_context *context,
106 struct draw_stage *stage);
107 void draw_aaline_prepare_outputs(struct draw_context *context,
108 struct draw_stage *stage);
109 void draw_unfilled_prepare_outputs(struct draw_context *context,
110 struct draw_stage *stage);
111
112 /**
113 * Get a writeable copy of a vertex.
114 * \param stage drawing stage info
115 * \param vert the vertex to copy (source)
116 * \param idx index into stage's tmp[] array to put the copy (dest)
117 * \return pointer to the copied vertex
118 */
119 static inline struct vertex_header *
dup_vert(struct draw_stage * stage,const struct vertex_header * vert,unsigned idx)120 dup_vert( struct draw_stage *stage,
121 const struct vertex_header *vert,
122 unsigned idx )
123 {
124 struct vertex_header *tmp = stage->tmp[idx];
125 const uint vsize = sizeof(struct vertex_header)
126 + draw_num_shader_outputs(stage->draw) * 4 * sizeof(float);
127 memcpy(tmp, vert, vsize);
128 tmp->vertex_id = UNDEFINED_VERTEX_ID;
129 return tmp;
130 }
131
132 #endif
133