summaryrefslogtreecommitdiffstats
path: root/src/gallium/auxiliary/draw/draw_pipe_util.c
blob: cb8c732afe8dcc81940509e845067336429a8f3b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/**************************************************************************
 * 
 * Copyright 2007 VMware, Inc.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

 /*
  * Authors:
  *   Keith Whitwell <keithw@vmware.com>
  */

#include "util/u_memory.h"
#include "draw/draw_private.h"
#include "draw/draw_pipe.h"



void
draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header)
{
   stage->next->point(stage->next, header);
}

void
draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header)
{
   stage->next->line(stage->next, header);
}

void
draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header)
{
   stage->next->tri(stage->next, header);
}





/* This is only used for temporary verts.
 */
#define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))


/**
 * Allocate space for temporary post-transform vertices, such as for clipping.
 */
boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
{
   assert(!stage->tmp);

   stage->tmp = NULL;
   stage->nr_tmps = nr;

   if (nr != 0)
   {
      unsigned i;
      ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );

      if (store == NULL)
         return FALSE;

      stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
      if (stage->tmp == NULL) {
         FREE(store);
         return FALSE;
      }
         
      for (i = 0; i < nr; i++)
         stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
   }

   return TRUE;
}


void draw_free_temp_verts( struct draw_stage *stage )
{
   if (stage->tmp) {
      FREE( stage->tmp[0] );
      FREE( stage->tmp );
      stage->tmp = NULL;
   }
}


/* Reset vertex ids.  This is basically a type of flush.
 *
 * Called only from draw_pipe_vbuf.c
 */
void draw_reset_vertex_ids(struct draw_context *draw)
{
   struct draw_stage *stage = draw->pipeline.first;
   
   while (stage) {
      unsigned i;

      for (i = 0; i < stage->nr_tmps; i++)
	 stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;

      stage = stage->next;
   }

   if (draw->pipeline.verts)
   {
      unsigned i;
      char *verts = draw->pipeline.verts;
      unsigned stride = draw->pipeline.vertex_stride;

      for (i = 0; i < draw->pipeline.vertex_count; i++) {
         ((struct vertex_header *)verts)->vertex_id = UNDEFINED_VERTEX_ID;
         verts += stride;
      }
   }
}