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 #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 void
draw_pipe_passthrough_line(struct draw_stage * stage,struct prim_header * header)46 draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header)
47 {
48 stage->next->line(stage->next, header);
49 }
50
51 void
draw_pipe_passthrough_tri(struct draw_stage * stage,struct prim_header * header)52 draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header)
53 {
54 stage->next->tri(stage->next, header);
55 }
56
57
58
59
60
61 /* This is only used for temporary verts.
62 */
63 #define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
64
65
66 /**
67 * Allocate space for temporary post-transform vertices, such as for clipping.
68 */
draw_alloc_temp_verts(struct draw_stage * stage,unsigned nr)69 boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
70 {
71 assert(!stage->tmp);
72
73 stage->tmp = NULL;
74 stage->nr_tmps = nr;
75
76 if (nr != 0)
77 {
78 unsigned i;
79 ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr +
80 DRAW_EXTRA_VERTICES_PADDING );
81 if (!store)
82 return FALSE;
83
84 stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
85 if (stage->tmp == NULL) {
86 FREE(store);
87 return FALSE;
88 }
89
90 for (i = 0; i < nr; i++)
91 stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
92 }
93
94 return TRUE;
95 }
96
97
draw_free_temp_verts(struct draw_stage * stage)98 void draw_free_temp_verts( struct draw_stage *stage )
99 {
100 if (stage->tmp) {
101 FREE( stage->tmp[0] );
102 FREE( stage->tmp );
103 stage->tmp = NULL;
104 }
105 }
106
107
108 /* Reset vertex ids. This is basically a type of flush.
109 *
110 * Called only from draw_pipe_vbuf.c
111 */
draw_reset_vertex_ids(struct draw_context * draw)112 void draw_reset_vertex_ids(struct draw_context *draw)
113 {
114 struct draw_stage *stage = draw->pipeline.first;
115
116 while (stage) {
117 unsigned i;
118
119 for (i = 0; i < stage->nr_tmps; i++)
120 stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
121
122 stage = stage->next;
123 }
124
125 if (draw->pipeline.verts)
126 {
127 unsigned i;
128 char *verts = draw->pipeline.verts;
129 unsigned stride = draw->pipeline.vertex_stride;
130
131 for (i = 0; i < draw->pipeline.vertex_count; i++) {
132 ((struct vertex_header *)verts)->vertex_id = UNDEFINED_VERTEX_ID;
133 verts += stride;
134 }
135 }
136 }
137
138