summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/draw/draw_pt_fetch_emit.c
blob: 5c8af17c8e36d6382a0b39e815ab22788fe33592 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

 /*
  * Authors:
  *   Keith Whitwell <keith@tungstengraphics.com>
  */

#include "util/u_memory.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_vbuf.h"
#include "draw/draw_vertex.h"
#include "draw/draw_pt.h"
#include "draw/draw_gs.h"
#include "translate/translate.h"
#include "translate/translate_cache.h"

/* The simplest 'middle end' in the new vertex code.  
 * 
 * The responsibilities of a middle end are to:
 *  - perform vertex fetch using
 *       - draw vertex element/buffer state
 *       - a list of fetch indices we received as an input
 *  - run the vertex shader
 *  - cliptest, 
 *  - clip coord calculation 
 *  - viewport transformation
 *  - if necessary, run the primitive pipeline, passing it:
 *       - a linear array of vertex_header vertices constructed here
 *       - a set of draw indices we received as an input
 *  - otherwise, drive the hw backend,
 *       - allocate space for hardware format vertices
 *       - translate the vertex-shader output vertices to hw format
 *       - calling the backend draw functions.
 *
 * For convenience, we provide a helper function to drive the hardware
 * backend given similar inputs to those required to run the pipeline.
 *
 * In the case of passthrough mode, many of these actions are disabled
 * or noops, so we end up doing:
 *
 *  - perform vertex fetch
 *  - drive the hw backend
 *
 * IE, basically just vertex fetch to post-vs-format vertices,
 * followed by a call to the backend helper function.
 */


struct fetch_emit_middle_end {
   struct draw_pt_middle_end base;
   struct draw_context *draw;
   
   struct translate *translate;
   const struct vertex_info *vinfo;

   /* Cache point size somewhere it's address won't change:
    */
   float point_size;

   struct translate_cache *cache;
};




static void fetch_emit_prepare( struct draw_pt_middle_end *middle,
                                unsigned prim,
				unsigned opt,
                                unsigned *max_vertices )
{
   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
   struct draw_context *draw = feme->draw;
   const struct vertex_info *vinfo;
   unsigned i, dst_offset;
   boolean ok;
   struct translate_key key;

   unsigned gs_out_prim = (draw->gs.geometry_shader ? 
                           draw->gs.geometry_shader->output_primitive :
                           prim);



   ok = draw->render->set_primitive( draw->render, 
                                     gs_out_prim );
   if (!ok) {
      assert(0);
      return;
   }
   
   /* Must do this after set_primitive() above:
    */
   vinfo = feme->vinfo = draw->render->get_vertex_info(draw->render);
   
   

   /* Transform from API vertices to HW vertices, skipping the
    * pipeline_vertex intermediate step.
    */
   dst_offset = 0;
   memset(&key, 0, sizeof(key));

   for (i = 0; i < vinfo->num_attribs; i++) {
      const struct pipe_vertex_element *src = &draw->pt.vertex_element[vinfo->attrib[i].src_index];

      unsigned emit_sz = 0;
      unsigned input_format = src->src_format;
      unsigned input_buffer = src->vertex_buffer_index;
      unsigned input_offset = src->src_offset;
      unsigned output_format;

      output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
      emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);

      if (vinfo->attrib[i].emit == EMIT_OMIT)
	 continue;

      if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
	 input_format = PIPE_FORMAT_R32_FLOAT;
	 input_buffer = draw->pt.nr_vertex_buffers;
	 input_offset = 0;
      }

      key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
      key.element[i].input_format = input_format;
      key.element[i].input_buffer = input_buffer;
      key.element[i].input_offset = input_offset;
      key.element[i].instance_divisor = src->instance_divisor;
      key.element[i].output_format = output_format;
      key.element[i].output_offset = dst_offset;
      
      dst_offset += emit_sz;
   }

   key.nr_elements = vinfo->num_attribs;
   key.output_stride = vinfo->size * 4;

   /* Don't bother with caching at this stage:
    */
   if (!feme->translate ||
       translate_key_compare(&feme->translate->key, &key) != 0) 
   {
      translate_key_sanitize(&key);
      feme->translate = translate_cache_find(feme->cache,
                                             &key);


      feme->translate->set_buffer(feme->translate, 
				  draw->pt.nr_vertex_buffers, 
				  &feme->point_size,
				  0,
				  ~0);
   }
   
   feme->point_size = draw->rasterizer->point_size;

   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
      feme->translate->set_buffer(feme->translate, 
                                  i, 
                                  ((char *)draw->pt.user.vbuffer[i] + 
                                   draw->pt.vertex_buffer[i].buffer_offset),
                                  draw->pt.vertex_buffer[i].stride,
                                  draw->pt.vertex_buffer[i].max_index);
   }

   *max_vertices = (draw->render->max_vertex_buffer_bytes / 
                    (vinfo->size * 4));

   /* Return an even number of verts.
    * This prevents "parity" errors when splitting long triangle strips which
    * can lead to front/back culling mix-ups.
    * Every other triangle in a strip has an alternate front/back orientation
    * so splitting at an odd position can cause the orientation of subsequent
    * triangles to get reversed.
    */
   *max_vertices = *max_vertices & ~1;
}





static void fetch_emit_run( struct draw_pt_middle_end *middle,
                            const unsigned *fetch_elts,
                            unsigned fetch_count,
                            const ushort *draw_elts,
                            unsigned draw_count )
{
   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
   struct draw_context *draw = feme->draw;
   void *hw_verts;
   
   /* XXX: need to flush to get prim_vbuf.c to release its allocation?? 
    */
   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   if (fetch_count >= UNDEFINED_VERTEX_ID) {
      assert(0);
      return;
   }

   draw->render->allocate_vertices( draw->render,
                                    (ushort)feme->translate->key.output_stride,
                                    (ushort)fetch_count );

   hw_verts = draw->render->map_vertices( draw->render );
   if (!hw_verts) {
      assert(0);
      return;
   }
         
					
   /* Single routine to fetch vertices and emit HW verts.
    */
   feme->translate->run_elts( feme->translate, 
			      fetch_elts,
			      fetch_count,
                              draw->instance_id,
			      hw_verts );

   if (0) {
      unsigned i;
      for (i = 0; i < fetch_count; i++) {
         debug_printf("\n\nvertex %d:\n", i);
         draw_dump_emitted_vertex( feme->vinfo, 
                                   (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
      }
   }

   draw->render->unmap_vertices( draw->render, 
                                 0, 
                                 (ushort)(fetch_count - 1) );

   /* XXX: Draw arrays path to avoid re-emitting index list again and
    * again.
    */
   draw->render->draw_elements( draw->render, 
                                draw_elts, 
                                draw_count );

   /* Done -- that was easy, wasn't it: 
    */
   draw->render->release_vertices( draw->render );

}


static void fetch_emit_run_linear( struct draw_pt_middle_end *middle,
                                   unsigned start,
                                   unsigned count )
{
   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
   struct draw_context *draw = feme->draw;
   void *hw_verts;

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
    */
   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   if (count >= UNDEFINED_VERTEX_ID) 
      goto fail;

   if (!draw->render->allocate_vertices( draw->render,
                                         (ushort)feme->translate->key.output_stride,
                                         (ushort)count )) 
      goto fail;

   hw_verts = draw->render->map_vertices( draw->render );
   if (!hw_verts) 
      goto fail;

   /* Single routine to fetch vertices and emit HW verts.
    */
   feme->translate->run( feme->translate,
                         start,
                         count,
                         draw->instance_id,
                         hw_verts );

   if (0) {
      unsigned i;
      for (i = 0; i < count; i++) {
         debug_printf("\n\nvertex %d:\n", i);
         draw_dump_emitted_vertex( feme->vinfo,
                                   (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
      }
   }

   draw->render->unmap_vertices( draw->render, 0, count - 1 );

   /* XXX: Draw arrays path to avoid re-emitting index list again and
    * again.
    */
   draw->render->draw_arrays( draw->render, 0, count );

   /* Done -- that was easy, wasn't it:
    */
   draw->render->release_vertices( draw->render );
   return;

fail:
   assert(0);
   return;
}


static boolean fetch_emit_run_linear_elts( struct draw_pt_middle_end *middle,
                                        unsigned start,
                                        unsigned count,
                                        const ushort *draw_elts,
                                        unsigned draw_count )
{
   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
   struct draw_context *draw = feme->draw;
   void *hw_verts;

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
    */
   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   if (count >= UNDEFINED_VERTEX_ID)
      return FALSE;

   if (!draw->render->allocate_vertices( draw->render,
                                         (ushort)feme->translate->key.output_stride,
                                         (ushort)count ))
      return FALSE;

   hw_verts = draw->render->map_vertices( draw->render );
   if (!hw_verts) 
      return FALSE;

   /* Single routine to fetch vertices and emit HW verts.
    */
   feme->translate->run( feme->translate,
                         start,
                         count,
                         draw->instance_id,
                         hw_verts );

   draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );

   /* XXX: Draw arrays path to avoid re-emitting index list again and
    * again.
    */
   draw->render->draw_elements( draw->render, 
                                draw_elts, 
                                draw_count );

   /* Done -- that was easy, wasn't it:
    */
   draw->render->release_vertices( draw->render );

   return TRUE;
}




static void fetch_emit_finish( struct draw_pt_middle_end *middle )
{
   /* nothing to do */
}

static void fetch_emit_destroy( struct draw_pt_middle_end *middle )
{
   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;

   if (feme->cache)
      translate_cache_destroy(feme->cache);

   FREE(middle);
}


struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw )
{
   struct fetch_emit_middle_end *fetch_emit = CALLOC_STRUCT( fetch_emit_middle_end );
   if (fetch_emit == NULL)
      return NULL;

   fetch_emit->cache = translate_cache_create();
   if (!fetch_emit->cache) {
      FREE(fetch_emit);
      return NULL;
   }

   fetch_emit->base.prepare    = fetch_emit_prepare;
   fetch_emit->base.run        = fetch_emit_run;
   fetch_emit->base.run_linear = fetch_emit_run_linear;
   fetch_emit->base.run_linear_elts = fetch_emit_run_linear_elts;
   fetch_emit->base.finish     = fetch_emit_finish;
   fetch_emit->base.destroy    = fetch_emit_destroy;

   fetch_emit->draw = draw;
     
   return &fetch_emit->base;
}