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 #include "util/u_memory.h"
34 #include "draw/draw_private.h"
35 #include "draw/draw_pipe.h"
36
37
38
39 void
draw_pipe_passthrough_point(struct draw_stage * stage,struct prim_header * header)40 draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header)
41 {
42 stage->next->point(stage->next, header);
43 }
44
45
46 void
draw_pipe_passthrough_line(struct draw_stage * stage,struct prim_header * header)47 draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header)
48 {
49 stage->next->line(stage->next, header);
50 }
51
52
53 void
draw_pipe_passthrough_tri(struct draw_stage * stage,struct prim_header * header)54 draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header)
55 {
56 stage->next->tri(stage->next, header);
57 }
58
59 /* This is only used for temporary verts.
60 */
61 #define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
62
63
64 /**
65 * Allocate space for temporary post-transform vertices, such as for clipping.
66 */
67 bool
draw_alloc_temp_verts(struct draw_stage * stage,unsigned nr)68 draw_alloc_temp_verts(struct draw_stage *stage, unsigned nr)
69 {
70 assert(!stage->tmp);
71
72 stage->tmp = NULL;
73 stage->nr_tmps = nr;
74
75 if (nr != 0) {
76 uint8_t *store = (uint8_t *) MALLOC(MAX_VERTEX_SIZE * nr +
77 DRAW_EXTRA_VERTICES_PADDING);
78 if (!store)
79 return false;
80
81 stage->tmp = (struct vertex_header **) MALLOC(sizeof(struct vertex_header *) * nr);
82 if (stage->tmp == NULL) {
83 FREE(store);
84 return false;
85 }
86
87 for (unsigned i = 0; i < nr; i++)
88 stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
89 }
90
91 return true;
92 }
93
94
95 void
draw_free_temp_verts(struct draw_stage * stage)96 draw_free_temp_verts(struct draw_stage *stage)
97 {
98 if (stage->tmp) {
99 FREE(stage->tmp[0]);
100 FREE(stage->tmp);
101 stage->tmp = NULL;
102 }
103 }
104
105
106 /* Reset vertex ids. This is basically a type of flush.
107 *
108 * Called only from draw_pipe_vbuf.c
109 */
110 void
draw_reset_vertex_ids(struct draw_context * draw)111 draw_reset_vertex_ids(struct draw_context *draw)
112 {
113 struct draw_stage *stage = draw->pipeline.first;
114
115 while (stage) {
116 for (unsigned i = 0; i < stage->nr_tmps; i++)
117 stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
118
119 stage = stage->next;
120 }
121
122 if (draw->pipeline.verts) {
123 char *verts = draw->pipeline.verts;
124 unsigned stride = draw->pipeline.vertex_stride;
125
126 for (unsigned i = 0; i < draw->pipeline.vertex_count; i++) {
127 ((struct vertex_header *)verts)->vertex_id = UNDEFINED_VERTEX_ID;
128 verts += stride;
129 }
130 }
131 }
132
133