draw_pt_fetch.c revision 17707d89f438d7f52a3918f9b351e1419314cb17 
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 if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
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_SINT;
101         key.element[nr].output_offset = dst_offset;
102
103         ei++;
104         dst_offset += 4 * sizeof(int);
105      } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
106         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
107         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
108         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
109         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
110         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
111         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
112         key.element[nr].output_offset = dst_offset;
113
114         ei++;
115         dst_offset += 4 * sizeof(unsigned);
116      } else {
117         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
118         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
119         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
120         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
121         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
122         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
123         key.element[nr].output_offset = dst_offset;
124
125         ei++;
126         dst_offset += 4 * sizeof(float);
127      }
128
129      nr++;
130   }
131
132   assert(dst_offset <= vertex_size);
133
134   key.nr_elements = nr;
135   key.output_stride = vertex_size;
136
137   if (!fetch->translate ||
138       translate_key_compare(&fetch->translate->key, &key) != 0)
139   {
140      translate_key_sanitize(&key);
141      fetch->translate = translate_cache_find(fetch->cache, &key);
142   }
143
144}
145
146
147
148
149void draw_pt_fetch_run( struct pt_fetch *fetch,
150			const unsigned *elts,
151			unsigned count,
152			char *verts )
153{
154   struct draw_context *draw = fetch->draw;
155   struct translate *translate = fetch->translate;
156   unsigned i;
157
158   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
159      translate->set_buffer(translate,
160			    i,
161			    ((char *)draw->pt.user.vbuffer[i] +
162			     draw->pt.vertex_buffer[i].buffer_offset),
163			    draw->pt.vertex_buffer[i].stride,
164			    draw->pt.max_index);
165   }
166
167   translate->run_elts( translate,
168			elts,
169			count,
170                        draw->instance_id,
171			verts );
172
173}
174
175
176void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
177                               unsigned start,
178                               unsigned count,
179                               char *verts )
180{
181   struct draw_context *draw = fetch->draw;
182   struct translate *translate = fetch->translate;
183   unsigned i;
184
185   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
186      translate->set_buffer(translate,
187			    i,
188			    ((char *)draw->pt.user.vbuffer[i] +
189			     draw->pt.vertex_buffer[i].buffer_offset),
190			    draw->pt.vertex_buffer[i].stride,
191			    draw->pt.user.max_index + draw->pt.user.eltBias);
192   }
193
194   translate->run( translate,
195                   start,
196                   count,
197                   draw->instance_id,
198                   verts );
199}
200
201
202struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
203{
204   struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
205   if (!fetch)
206      return NULL;
207
208   fetch->draw = draw;
209   fetch->cache = translate_cache_create();
210   if (!fetch->cache) {
211      FREE(fetch);
212      return NULL;
213   }
214
215   return fetch;
216}
217
218void draw_pt_fetch_destroy( struct pt_fetch *fetch )
219{
220   if (fetch->cache)
221      translate_cache_destroy(fetch->cache);
222
223   FREE(fetch);
224}
225
226