draw_pt_fetch.c revision 5fcd84ab39318a371253b1a7285bc657fb82efed 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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#include "pipe/p_util.h"
29#include "draw/draw_context.h"
30#include "draw/draw_private.h"
31#include "draw/draw_vbuf.h"
32#include "draw/draw_vertex.h"
33#include "draw/draw_pt.h"
34#include "translate/translate.h"
35#include "translate/translate_cache.h"
36
37
38struct pt_fetch {
39   struct draw_context *draw;
40
41   struct translate *translate;
42
43   unsigned vertex_size;
44
45   struct translate_cache *cache;
46};
47
48/* Perform the fetch from API vertex elements & vertex buffers, to a
49 * contiguous set of float[4] attributes as required for the
50 * vertex_shader->run_linear() method.
51 *
52 * This is used in all cases except pure passthrough
53 * (draw_pt_fetch_emit.c) which has its own version to translate
54 * directly to hw vertices.
55 *
56 */
57void draw_pt_fetch_prepare( struct pt_fetch *fetch,
58			    unsigned vertex_size )
59{
60   struct draw_context *draw = fetch->draw;
61   unsigned i, nr = 0;
62   unsigned dst_offset = 0;
63   struct translate_key key;
64
65   fetch->vertex_size = vertex_size;
66
67   memset(&key, 0, sizeof(key));
68
69   /* Always emit/leave space for a vertex header.
70    *
71    * It's worth considering whether the vertex headers should contain
72    * a pointer to the 'data', rather than having it inline.
73    * Something to look at after we've fully switched over to the pt
74    * paths.
75    */
76   {
77      /* Need to set header->vertex_id = 0xffff somehow.
78       */
79      key.element[nr].input_format = PIPE_FORMAT_R32_FLOAT;
80      key.element[nr].input_buffer = draw->pt.nr_vertex_buffers;
81      key.element[nr].input_offset = 0;
82      key.element[nr].output_format = PIPE_FORMAT_R32_FLOAT;
83      key.element[nr].output_offset = dst_offset;
84      dst_offset += 1 * sizeof(float);
85      nr++;
86
87
88      /* Just leave the clip[] array untouched.
89       */
90      dst_offset += 4 * sizeof(float);
91   }
92
93
94   for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
95      key.element[nr].input_format = draw->pt.vertex_element[i].src_format;
96      key.element[nr].input_buffer = draw->pt.vertex_element[i].vertex_buffer_index;
97      key.element[nr].input_offset = draw->pt.vertex_element[i].src_offset;
98      key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
99      key.element[nr].output_offset = dst_offset;
100
101      dst_offset += 4 * sizeof(float);
102      nr++;
103   }
104
105   assert(dst_offset <= vertex_size);
106
107   key.nr_elements = nr;
108   key.output_stride = vertex_size;
109
110
111   if (!fetch->translate ||
112       memcmp(&fetch->translate->key, &key, sizeof(key)) != 0)
113   {
114      fetch->translate = translate_cache_find(fetch->cache, &key);
115
116      {
117	 static struct vertex_header vh = { 0, 0, 0, 0xffff };
118	 fetch->translate->set_buffer(fetch->translate,
119				      draw->pt.nr_vertex_buffers,
120				      &vh,
121				      0);
122      }
123   }
124}
125
126
127
128
129void draw_pt_fetch_run( struct pt_fetch *fetch,
130			const unsigned *elts,
131			unsigned count,
132			char *verts )
133{
134   struct draw_context *draw = fetch->draw;
135   struct translate *translate = fetch->translate;
136   unsigned i;
137
138   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
139      translate->set_buffer(translate,
140			    i,
141			    ((char *)draw->pt.user.vbuffer[i] +
142			     draw->pt.vertex_buffer[i].buffer_offset),
143			    draw->pt.vertex_buffer[i].pitch );
144   }
145
146   translate->run_elts( translate,
147			elts,
148			count,
149			verts );
150}
151
152
153struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
154{
155   struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
156   if (!fetch)
157      return NULL;
158
159   fetch->draw = draw;
160   fetch->cache = translate_cache_create();
161   return fetch;
162}
163
164void draw_pt_fetch_destroy( struct pt_fetch *fetch )
165{
166   translate_cache_destroy(fetch->cache);
167
168   FREE(fetch);
169}
170
171