draw_pt_fetch.c revision 293a3916bd0dfa4fb8850e58f81743bfab0f89dc 
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_pt.h"
33#include "translate/translate.h"
34#include "translate/translate_cache.h"
35
36
37struct pt_fetch {
38   struct draw_context *draw;
39
40   struct translate *translate;
41
42   unsigned vertex_size;
43
44   struct translate_cache *cache;
45};
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 vs_input_count,
59                            unsigned vertex_size,
60                            unsigned instance_id_index )
61{
62   struct draw_context *draw = fetch->draw;
63   unsigned nr_inputs;
64   unsigned i, nr = 0, ei = 0;
65   unsigned dst_offset = 0;
66   unsigned num_extra_inputs = 0;
67   struct translate_key key;
68
69   fetch->vertex_size = vertex_size;
70
71   /* Leave the clipmask/edgeflags/pad/vertex_id untouched
72    */
73   dst_offset += 1 * sizeof(float);
74   /* Just leave the clip[] array untouched.
75    */
76   dst_offset += 4 * sizeof(float);
77
78   if (instance_id_index != ~0) {
79      num_extra_inputs++;
80   }
81
82   assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
83
84   nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
85
86   for (i = 0; i < nr_inputs; i++) {
87      if (i == instance_id_index) {
88         key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
89         key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
90         key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
91         key.element[nr].output_offset = dst_offset;
92
93         dst_offset += sizeof(uint);
94      } else {
95         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
96         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
97         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
98         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
99         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
100         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
101         key.element[nr].output_offset = dst_offset;
102
103         ei++;
104         dst_offset += 4 * sizeof(float);
105      }
106
107      nr++;
108   }
109
110   assert(dst_offset <= vertex_size);
111
112   key.nr_elements = nr;
113   key.output_stride = vertex_size;
114
115   if (!fetch->translate ||
116       translate_key_compare(&fetch->translate->key, &key) != 0)
117   {
118      translate_key_sanitize(&key);
119      fetch->translate = translate_cache_find(fetch->cache, &key);
120   }
121
122}
123
124
125
126
127void draw_pt_fetch_run( struct pt_fetch *fetch,
128			const unsigned *elts,
129			unsigned count,
130			char *verts )
131{
132   struct draw_context *draw = fetch->draw;
133   struct translate *translate = fetch->translate;
134   unsigned i;
135
136   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
137      translate->set_buffer(translate,
138			    i,
139			    ((char *)draw->pt.user.vbuffer[i] +
140			     draw->pt.vertex_buffer[i].buffer_offset),
141			    draw->pt.vertex_buffer[i].stride,
142			    draw->pt.max_index);
143   }
144
145   translate->run_elts( translate,
146			elts,
147			count,
148                        draw->instance_id,
149			verts );
150
151}
152
153
154void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
155                               unsigned start,
156                               unsigned count,
157                               char *verts )
158{
159   struct draw_context *draw = fetch->draw;
160   struct translate *translate = fetch->translate;
161   unsigned i;
162
163   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
164      translate->set_buffer(translate,
165			    i,
166			    ((char *)draw->pt.user.vbuffer[i] +
167			     draw->pt.vertex_buffer[i].buffer_offset),
168			    draw->pt.vertex_buffer[i].stride,
169			    draw->pt.user.max_index + draw->pt.user.eltBias);
170   }
171
172   translate->run( translate,
173                   start,
174                   count,
175                   draw->instance_id,
176                   verts );
177}
178
179
180struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
181{
182   struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
183   if (!fetch)
184      return NULL;
185
186   fetch->draw = draw;
187   fetch->cache = translate_cache_create();
188   if (!fetch->cache) {
189      FREE(fetch);
190      return NULL;
191   }
192
193   return fetch;
194}
195
196void draw_pt_fetch_destroy( struct pt_fetch *fetch )
197{
198   if (fetch->cache)
199      translate_cache_destroy(fetch->cache);
200
201   FREE(fetch);
202}
203
204