draw_pt_fetch.c revision 784026139cc15db384bed858e7be943b79772aa4 
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/* Perform the fetch from API vertex elements & vertex buffers, to a
50 * contiguous set of float[4] attributes as required for the
51 * vertex_shader->run_linear() method.
52 *
53 * This is used in all cases except pure passthrough
54 * (draw_pt_fetch_emit.c) which has its own version to translate
55 * directly to hw vertices.
56 *
57 */
58void draw_pt_fetch_prepare( struct pt_fetch *fetch,
59                            unsigned vs_input_count,
60                            unsigned vertex_size,
61                            unsigned instance_id_index )
62{
63   struct draw_context *draw = fetch->draw;
64   unsigned nr_inputs;
65   unsigned i, nr = 0, ei = 0;
66   unsigned dst_offset = 0;
67   unsigned num_extra_inputs = 0;
68   struct translate_key key;
69
70   fetch->vertex_size = vertex_size;
71
72   /* Leave the clipmask/edgeflags/pad/vertex_id untouched
73    */
74   dst_offset += 1 * sizeof(float);
75   /* Just leave the clip[] array untouched.
76    */
77   dst_offset += 4 * sizeof(float);
78
79   if (instance_id_index != ~0) {
80      num_extra_inputs++;
81   }
82
83   assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
84
85   nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
86
87   for (i = 0; i < nr_inputs; i++) {
88      if (i == instance_id_index) {
89         key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
90         key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
91         key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
92         key.element[nr].output_offset = dst_offset;
93
94         dst_offset += sizeof(uint);
95      } else if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
96         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
97         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
98         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
99         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
100         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
101         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_SINT;
102         key.element[nr].output_offset = dst_offset;
103
104         ei++;
105         dst_offset += 4 * sizeof(int);
106      } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
107         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
108         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
109         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
110         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
111         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
112         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
113         key.element[nr].output_offset = dst_offset;
114
115         ei++;
116         dst_offset += 4 * sizeof(unsigned);
117      } else {
118         key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
119         key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
120         key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
121         key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
122         key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
123         key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
124         key.element[nr].output_offset = dst_offset;
125
126         ei++;
127         dst_offset += 4 * sizeof(float);
128      }
129
130      nr++;
131   }
132
133   assert(dst_offset <= vertex_size);
134
135   key.nr_elements = nr;
136   key.output_stride = vertex_size;
137
138   if (!fetch->translate ||
139       translate_key_compare(&fetch->translate->key, &key) != 0)
140   {
141      translate_key_sanitize(&key);
142      fetch->translate = translate_cache_find(fetch->cache, &key);
143   }
144
145}
146
147
148
149
150void draw_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
176
177void draw_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.user.max_index + draw->pt.user.eltBias);
193   }
194
195   translate->run( translate,
196                   start,
197                   count,
198                   draw->instance_id,
199                   verts );
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