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 "util/u_format.h"
31#include "draw/draw_context.h"
32#include "draw/draw_private.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
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
60draw_pt_fetch_prepare(struct pt_fetch *fetch,
61                      unsigned vs_input_count,
62                      unsigned vertex_size,
63                      unsigned instance_id_index)
64{
65   struct draw_context *draw = fetch->draw;
66   unsigned nr_inputs;
67   unsigned i, nr = 0, ei = 0;
68   unsigned dst_offset = 0;
69   unsigned num_extra_inputs = 0;
70   struct translate_key key;
71
72   fetch->vertex_size = vertex_size;
73
74   /* Leave the clipmask/edgeflags/pad/vertex_id untouched
75    */
76   dst_offset += 1 * sizeof(float);
77   /* Just leave the clip[] and pre_clip_pos[] array untouched.
78    */
79   dst_offset += 8 * sizeof(float);
80
81   if (instance_id_index != ~0) {
82      num_extra_inputs++;
83   }
84
85   assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
86
87   nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
88
89   for (i = 0; i < nr_inputs; i++) {
90      if (i == instance_id_index) {
91         key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
92         key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
93         key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
94         key.element[nr].output_offset = dst_offset;
95
96         dst_offset += sizeof(uint);
97      } else if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
98         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
99         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
100         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
101         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
102         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
103         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_SINT;
104         key.element[nr].output_offset = dst_offset;
105
106         ei++;
107         dst_offset += 4 * sizeof(int);
108      } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
109         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
110         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
111         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
112         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
113         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
114         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
115         key.element[nr].output_offset = dst_offset;
116
117         ei++;
118         dst_offset += 4 * sizeof(unsigned);
119      } else {
120         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
121         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
122         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
123         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
124         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
125         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
126         key.element[nr].output_offset = dst_offset;
127
128         ei++;
129         dst_offset += 4 * sizeof(float);
130      }
131
132      nr++;
133   }
134
135   assert(dst_offset <= vertex_size);
136
137   key.nr_elements = nr;
138   key.output_stride = vertex_size;
139
140   if (!fetch->translate ||
141       translate_key_compare(&fetch->translate->key, &key) != 0)
142   {
143      translate_key_sanitize(&key);
144      fetch->translate = translate_cache_find(fetch->cache, &key);
145   }
146}
147
148
149void
150draw_pt_fetch_run(struct pt_fetch *fetch,
151                  const unsigned *elts,
152                  unsigned count,
153                  char *verts)
154{
155   struct draw_context *draw = fetch->draw;
156   struct translate *translate = fetch->translate;
157   unsigned i;
158
159   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
160      translate->set_buffer(translate,
161			    i,
162			    ((char *)draw->pt.user.vbuffer[i] +
163			     draw->pt.vertex_buffer[i].buffer_offset),
164			    draw->pt.vertex_buffer[i].stride,
165			    draw->pt.max_index);
166   }
167
168   translate->run_elts( translate,
169			elts,
170			count,
171                        draw->instance_id,
172			verts );
173}
174
175
176void
177draw_pt_fetch_run_linear(struct pt_fetch *fetch,
178                         unsigned start,
179                         unsigned count,
180                         char *verts)
181{
182   struct draw_context *draw = fetch->draw;
183   struct translate *translate = fetch->translate;
184   unsigned i;
185
186   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
187      translate->set_buffer(translate,
188			    i,
189			    ((char *)draw->pt.user.vbuffer[i] +
190			     draw->pt.vertex_buffer[i].buffer_offset),
191			    draw->pt.vertex_buffer[i].stride,
192			    draw->pt.max_index);
193   }
194
195   translate->run( translate,
196                   start,
197                   count,
198                   draw->instance_id,
199                   verts );
200}
201
202
203struct pt_fetch *
204draw_pt_fetch_create(struct draw_context *draw)
205{
206   struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
207   if (!fetch)
208      return NULL;
209
210   fetch->draw = draw;
211   fetch->cache = translate_cache_create();
212   if (!fetch->cache) {
213      FREE(fetch);
214      return NULL;
215   }
216
217   return fetch;
218}
219
220
221void
222draw_pt_fetch_destroy(struct pt_fetch *fetch)
223{
224   if (fetch->cache)
225      translate_cache_destroy(fetch->cache);
226
227   FREE(fetch);
228}
229