draw_pt_fetch.c revision a08e348a84f57ed5e8bf5888f1ce13934d2ce8fa 
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 "util/u_memory.h"
29#include "util/u_math.h"
30#include "draw/draw_context.h"
31#include "draw/draw_private.h"
32#include "draw/draw_vbuf.h"
33#include "draw/draw_vertex.h"
34#include "draw/draw_pt.h"
35#include "translate/translate.h"
36#include "translate/translate_cache.h"
37
38
39struct pt_fetch {
40   struct draw_context *draw;
41
42   struct translate *translate;
43
44   unsigned vertex_size;
45   boolean need_edgeflags;
46
47   struct translate_cache *cache;
48};
49
50/* Perform the fetch from API vertex elements & vertex buffers, to a
51 * contiguous set of float[4] attributes as required for the
52 * vertex_shader->run_linear() method.
53 *
54 * This is used in all cases except pure passthrough
55 * (draw_pt_fetch_emit.c) which has its own version to translate
56 * directly to hw vertices.
57 *
58 */
59void draw_pt_fetch_prepare( struct pt_fetch *fetch,
60                            unsigned vs_input_count,
61			    unsigned vertex_size )
62{
63   struct draw_context *draw = fetch->draw;
64   unsigned nr_inputs;
65   unsigned i, nr = 0;
66   unsigned dst_offset = 0;
67   struct translate_key key;
68
69   fetch->vertex_size = vertex_size;
70
71   /* Always emit/leave space for a vertex header.
72    *
73    * It's worth considering whether the vertex headers should contain
74    * a pointer to the 'data', rather than having it inline.
75    * Something to look at after we've fully switched over to the pt
76    * paths.
77    */
78   {
79      /* Need to set header->vertex_id = 0xffff somehow.
80       */
81      key.element[nr].input_format = PIPE_FORMAT_R32_FLOAT;
82      key.element[nr].input_buffer = draw->pt.nr_vertex_buffers;
83      key.element[nr].input_offset = 0;
84      key.element[nr].output_format = PIPE_FORMAT_R32_FLOAT;
85      key.element[nr].output_offset = dst_offset;
86      dst_offset += 1 * sizeof(float);
87      nr++;
88
89
90      /* Just leave the clip[] array untouched.
91       */
92      dst_offset += 4 * sizeof(float);
93   }
94
95   assert( draw->pt.nr_vertex_elements >= vs_input_count );
96
97   nr_inputs = MIN2( vs_input_count, draw->pt.nr_vertex_elements );
98
99   for (i = 0; i < nr_inputs; i++) {
100      key.element[nr].input_format = draw->pt.vertex_element[i].src_format;
101      key.element[nr].input_buffer = draw->pt.vertex_element[i].vertex_buffer_index;
102      key.element[nr].input_offset = draw->pt.vertex_element[i].src_offset;
103      key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
104      key.element[nr].output_offset = dst_offset;
105
106      dst_offset += 4 * sizeof(float);
107      nr++;
108   }
109
110   assert(dst_offset <= vertex_size);
111
112   key.nr_elements = nr;
113   key.output_stride = vertex_size;
114
115
116   if (!fetch->translate ||
117       translate_key_compare(&fetch->translate->key, &key) != 0)
118   {
119      translate_key_sanitize(&key);
120      fetch->translate = translate_cache_find(fetch->cache, &key);
121
122      {
123         static struct vertex_header vh = { 0,
124                                            1,
125                                            0,
126                                            UNDEFINED_VERTEX_ID,
127                                            { .0f, .0f, .0f, .0f } };
128
129	 fetch->translate->set_buffer(fetch->translate,
130				      draw->pt.nr_vertex_buffers,
131				      &vh,
132				      0);
133      }
134   }
135
136}
137
138
139
140
141void draw_pt_fetch_run( struct pt_fetch *fetch,
142			const unsigned *elts,
143			unsigned count,
144			char *verts )
145{
146   struct draw_context *draw = fetch->draw;
147   struct translate *translate = fetch->translate;
148   unsigned i;
149
150   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
151      translate->set_buffer(translate,
152			    i,
153			    ((char *)draw->pt.user.vbuffer[i] +
154			     draw->pt.vertex_buffer[i].buffer_offset),
155			    draw->pt.vertex_buffer[i].stride );
156   }
157
158   translate->run_elts( translate,
159			elts,
160			count,
161			verts );
162
163   /* Extract edgeflag values from vertex data into the header.
164    */
165   if (fetch->need_edgeflags) {
166      extract_edge_flags( fetch, count );
167   }
168}
169
170
171void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
172                               unsigned start,
173                               unsigned count,
174                               char *verts )
175{
176   struct draw_context *draw = fetch->draw;
177   struct translate *translate = fetch->translate;
178   unsigned i;
179
180   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
181      translate->set_buffer(translate,
182			    i,
183			    ((char *)draw->pt.user.vbuffer[i] +
184			     draw->pt.vertex_buffer[i].buffer_offset),
185			    draw->pt.vertex_buffer[i].stride );
186   }
187
188   translate->run( translate,
189                   start,
190                   count,
191                   verts );
192
193   /* Extract edgeflag values from vertex data into the header.  XXX:
194    * this should be done after the vertex shader is run.
195    * Bypass-vs-and-clip interaction with pipeline???
196    */
197   if (fetch->need_edgeflags) {
198      extract_edge_flags( fetch, count );
199   }
200}
201
202
203struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
204{
205   struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
206   if (!fetch)
207      return NULL;
208
209   fetch->draw = draw;
210   fetch->cache = translate_cache_create();
211   if (!fetch->cache) {
212      FREE(fetch);
213      return NULL;
214   }
215
216   return fetch;
217}
218
219void draw_pt_fetch_destroy( struct pt_fetch *fetch )
220{
221   if (fetch->cache)
222      translate_cache_destroy(fetch->cache);
223
224   FREE(fetch);
225}
226
227