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 <[email protected]>
31 */
32
33 #ifndef DRAW_PIPE_H
34 #define DRAW_PIPE_H
35
36 #include "util/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 uint16_t flags;
47 uint16_t pad;
48 struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */
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 *, struct prim_header *);
66
67 void (*line)(struct draw_stage *, struct prim_header *);
68
69 void (*tri)(struct draw_stage *, struct prim_header *);
70
71 void (*flush)(struct draw_stage *, unsigned flags);
72
73 void (*reset_stipple_counter)(struct draw_stage *);
74
75 void (*destroy)(struct draw_stage *);
76 };
77
78
79 struct draw_stage *draw_unfilled_stage(struct draw_context *context);
80 struct draw_stage *draw_twoside_stage(struct draw_context *context);
81 struct draw_stage *draw_offset_stage(struct draw_context *context);
82 struct draw_stage *draw_clip_stage(struct draw_context *context);
83 struct draw_stage *draw_flatshade_stage(struct draw_context *context);
84 struct draw_stage *draw_cull_stage(struct draw_context *context);
85 struct draw_stage *draw_user_cull_stage(struct draw_context *draw);
86 struct draw_stage *draw_stipple_stage(struct draw_context *context);
87 struct draw_stage *draw_wide_line_stage(struct draw_context *context);
88 struct draw_stage *draw_wide_point_stage(struct draw_context *context);
89 struct draw_stage *draw_validate_stage(struct draw_context *context);
90
91 void draw_free_temp_verts(struct draw_stage *stage);
92 bool draw_alloc_temp_verts(struct draw_stage *stage, unsigned nr);
93
94 void draw_reset_vertex_ids(struct draw_context *draw);
95
96 void draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header);
97 void draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header);
98 void draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header);
99
100 void draw_aapoint_prepare_outputs(struct draw_context *context,
101 struct draw_stage *stage);
102 void draw_aaline_prepare_outputs(struct draw_context *context,
103 struct draw_stage *stage);
104 void draw_unfilled_prepare_outputs(struct draw_context *context,
105 struct draw_stage *stage);
106
107
108 /**
109 * Get a writeable copy of a vertex.
110 * \param stage drawing stage info
111 * \param vert the vertex to copy (source)
112 * \param idx index into stage's tmp[] array to put the copy (dest)
113 * \return pointer to the copied vertex
114 */
115 static inline struct vertex_header *
dup_vert(struct draw_stage * stage,const struct vertex_header * vert,unsigned idx)116 dup_vert(struct draw_stage *stage,
117 const struct vertex_header *vert,
118 unsigned idx)
119 {
120 struct vertex_header *tmp = stage->tmp[idx];
121 const unsigned vsize = sizeof(struct vertex_header)
122 + draw_num_shader_outputs(stage->draw) * 4 * sizeof(float);
123 memcpy(tmp, vert, vsize);
124 tmp->vertex_id = UNDEFINED_VERTEX_ID;
125 return tmp;
126 }
127
128 #endif
129