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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  
38  struct 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   */
59  void
draw_pt_fetch_prepare(struct pt_fetch * fetch,unsigned vs_input_count,unsigned vertex_size,unsigned instance_id_index)60  draw_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  
149  void
draw_pt_fetch_run(struct pt_fetch * fetch,const unsigned * elts,unsigned count,char * verts)150  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  void
draw_pt_fetch_run_linear(struct pt_fetch * fetch,unsigned start,unsigned count,char * verts)177  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.max_index);
193     }
194  
195     translate->run( translate,
196                     start,
197                     count,
198                     draw->instance_id,
199                     verts );
200  }
201  
202  
203  struct pt_fetch *
draw_pt_fetch_create(struct draw_context * draw)204  draw_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  
221  void
draw_pt_fetch_destroy(struct pt_fetch * fetch)222  draw_pt_fetch_destroy(struct pt_fetch *fetch)
223  {
224     if (fetch->cache)
225        translate_cache_destroy(fetch->cache);
226  
227     FREE(fetch);
228  }
229