draw_pt_fetch_emit.c revision 3733da31e8b4405b65e1b6ca3b6599ecc5af5fe7 
1/**************************************************************************
2 *
3 * Copyright 2007 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 /*
29  * Authors:
30  *   Keith Whitwell <keith@tungstengraphics.com>
31  */
32
33#include "util/u_memory.h"
34#include "draw/draw_context.h"
35#include "draw/draw_private.h"
36#include "draw/draw_vbuf.h"
37#include "draw/draw_vertex.h"
38#include "draw/draw_pt.h"
39#include "draw/draw_gs.h"
40#include "translate/translate.h"
41#include "translate/translate_cache.h"
42
43/* The simplest 'middle end' in the new vertex code.
44 *
45 * The responsibilities of a middle end are to:
46 *  - perform vertex fetch using
47 *       - draw vertex element/buffer state
48 *       - a list of fetch indices we received as an input
49 *  - run the vertex shader
50 *  - cliptest,
51 *  - clip coord calculation
52 *  - viewport transformation
53 *  - if necessary, run the primitive pipeline, passing it:
54 *       - a linear array of vertex_header vertices constructed here
55 *       - a set of draw indices we received as an input
56 *  - otherwise, drive the hw backend,
57 *       - allocate space for hardware format vertices
58 *       - translate the vertex-shader output vertices to hw format
59 *       - calling the backend draw functions.
60 *
61 * For convenience, we provide a helper function to drive the hardware
62 * backend given similar inputs to those required to run the pipeline.
63 *
64 * In the case of passthrough mode, many of these actions are disabled
65 * or noops, so we end up doing:
66 *
67 *  - perform vertex fetch
68 *  - drive the hw backend
69 *
70 * IE, basically just vertex fetch to post-vs-format vertices,
71 * followed by a call to the backend helper function.
72 */
73
74
75struct fetch_emit_middle_end {
76   struct draw_pt_middle_end base;
77   struct draw_context *draw;
78
79   struct translate *translate;
80   const struct vertex_info *vinfo;
81
82   /* Cache point size somewhere it's address won't change:
83    */
84   float point_size;
85
86   struct translate_cache *cache;
87};
88
89
90
91
92static void fetch_emit_prepare( struct draw_pt_middle_end *middle,
93                                unsigned prim,
94				unsigned opt,
95                                unsigned *max_vertices )
96{
97   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
98   struct draw_context *draw = feme->draw;
99   const struct vertex_info *vinfo;
100   unsigned i, dst_offset;
101   boolean ok;
102   struct translate_key key;
103
104   unsigned gs_out_prim = (draw->gs.geometry_shader ?
105                           draw->gs.geometry_shader->output_primitive :
106                           prim);
107
108
109
110   ok = draw->render->set_primitive( draw->render,
111                                     gs_out_prim );
112   if (!ok) {
113      assert(0);
114      return;
115   }
116
117   /* Must do this after set_primitive() above:
118    */
119   vinfo = feme->vinfo = draw->render->get_vertex_info(draw->render);
120
121
122
123   /* Transform from API vertices to HW vertices, skipping the
124    * pipeline_vertex intermediate step.
125    */
126   dst_offset = 0;
127   memset(&key, 0, sizeof(key));
128
129   for (i = 0; i < vinfo->num_attribs; i++) {
130      const struct pipe_vertex_element *src = &draw->pt.vertex_element[vinfo->attrib[i].src_index];
131
132      unsigned emit_sz = 0;
133      unsigned input_format = src->src_format;
134      unsigned input_buffer = src->vertex_buffer_index;
135      unsigned input_offset = src->src_offset;
136      unsigned output_format;
137
138      output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
139      emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
140
141      if (vinfo->attrib[i].emit == EMIT_OMIT)
142	 continue;
143
144      if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
145	 input_format = PIPE_FORMAT_R32_FLOAT;
146	 input_buffer = draw->pt.nr_vertex_buffers;
147	 input_offset = 0;
148      }
149
150      key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
151      key.element[i].input_format = input_format;
152      key.element[i].input_buffer = input_buffer;
153      key.element[i].input_offset = input_offset;
154      key.element[i].instance_divisor = src->instance_divisor;
155      key.element[i].output_format = output_format;
156      key.element[i].output_offset = dst_offset;
157
158      dst_offset += emit_sz;
159   }
160
161   key.nr_elements = vinfo->num_attribs;
162   key.output_stride = vinfo->size * 4;
163
164   /* Don't bother with caching at this stage:
165    */
166   if (!feme->translate ||
167       translate_key_compare(&feme->translate->key, &key) != 0)
168   {
169      translate_key_sanitize(&key);
170      feme->translate = translate_cache_find(feme->cache,
171                                             &key);
172
173
174      feme->translate->set_buffer(feme->translate,
175				  draw->pt.nr_vertex_buffers,
176				  &feme->point_size,
177				  0,
178				  ~0);
179   }
180
181   feme->point_size = draw->rasterizer->point_size;
182
183   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
184      feme->translate->set_buffer(feme->translate,
185                                  i,
186                                  ((char *)draw->pt.user.vbuffer[i] +
187                                   draw->pt.vertex_buffer[i].buffer_offset),
188                                  draw->pt.vertex_buffer[i].stride,
189                                  draw->pt.max_index);
190   }
191
192   *max_vertices = (draw->render->max_vertex_buffer_bytes /
193                    (vinfo->size * 4));
194}
195
196
197
198
199
200static void fetch_emit_run( struct draw_pt_middle_end *middle,
201                            const unsigned *fetch_elts,
202                            unsigned fetch_count,
203                            const ushort *draw_elts,
204                            unsigned draw_count,
205                            unsigned prim_flags )
206{
207   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
208   struct draw_context *draw = feme->draw;
209   void *hw_verts;
210
211   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
212    */
213   draw_do_flush( draw, DRAW_FLUSH_BACKEND );
214
215   draw->render->allocate_vertices( draw->render,
216                                    (ushort)feme->translate->key.output_stride,
217                                    (ushort)fetch_count );
218
219   hw_verts = draw->render->map_vertices( draw->render );
220   if (!hw_verts) {
221      assert(0);
222      return;
223   }
224
225
226   /* Single routine to fetch vertices and emit HW verts.
227    */
228   feme->translate->run_elts( feme->translate,
229			      fetch_elts,
230			      fetch_count,
231                              draw->instance_id,
232			      hw_verts );
233
234   if (0) {
235      unsigned i;
236      for (i = 0; i < fetch_count; i++) {
237         debug_printf("\n\nvertex %d:\n", i);
238         draw_dump_emitted_vertex( feme->vinfo,
239                                   (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
240      }
241   }
242
243   draw->render->unmap_vertices( draw->render,
244                                 0,
245                                 (ushort)(fetch_count - 1) );
246
247   /* XXX: Draw arrays path to avoid re-emitting index list again and
248    * again.
249    */
250   draw->render->draw_elements( draw->render,
251                                draw_elts,
252                                draw_count );
253
254   /* Done -- that was easy, wasn't it:
255    */
256   draw->render->release_vertices( draw->render );
257
258}
259
260
261static void fetch_emit_run_linear( struct draw_pt_middle_end *middle,
262                                   unsigned start,
263                                   unsigned count,
264                                   unsigned prim_flags )
265{
266   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
267   struct draw_context *draw = feme->draw;
268   void *hw_verts;
269
270   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
271    */
272   draw_do_flush( draw, DRAW_FLUSH_BACKEND );
273
274   if (!draw->render->allocate_vertices( draw->render,
275                                         (ushort)feme->translate->key.output_stride,
276                                         (ushort)count ))
277      goto fail;
278
279   hw_verts = draw->render->map_vertices( draw->render );
280   if (!hw_verts)
281      goto fail;
282
283   /* Single routine to fetch vertices and emit HW verts.
284    */
285   feme->translate->run( feme->translate,
286                         start,
287                         count,
288                         draw->instance_id,
289                         hw_verts );
290
291   if (0) {
292      unsigned i;
293      for (i = 0; i < count; i++) {
294         debug_printf("\n\nvertex %d:\n", i);
295         draw_dump_emitted_vertex( feme->vinfo,
296                                   (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
297      }
298   }
299
300   draw->render->unmap_vertices( draw->render, 0, count - 1 );
301
302   /* XXX: Draw arrays path to avoid re-emitting index list again and
303    * again.
304    */
305   draw->render->draw_arrays( draw->render, 0, count );
306
307   /* Done -- that was easy, wasn't it:
308    */
309   draw->render->release_vertices( draw->render );
310   return;
311
312fail:
313   assert(0);
314   return;
315}
316
317
318static boolean fetch_emit_run_linear_elts( struct draw_pt_middle_end *middle,
319                                        unsigned start,
320                                        unsigned count,
321                                        const ushort *draw_elts,
322                                        unsigned draw_count,
323                                        unsigned prim_flags )
324{
325   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
326   struct draw_context *draw = feme->draw;
327   void *hw_verts;
328
329   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
330    */
331   draw_do_flush( draw, DRAW_FLUSH_BACKEND );
332
333   if (!draw->render->allocate_vertices( draw->render,
334                                         (ushort)feme->translate->key.output_stride,
335                                         (ushort)count ))
336      return FALSE;
337
338   hw_verts = draw->render->map_vertices( draw->render );
339   if (!hw_verts)
340      return FALSE;
341
342   /* Single routine to fetch vertices and emit HW verts.
343    */
344   feme->translate->run( feme->translate,
345                         start,
346                         count,
347                         draw->instance_id,
348                         hw_verts );
349
350   draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
351
352   /* XXX: Draw arrays path to avoid re-emitting index list again and
353    * again.
354    */
355   draw->render->draw_elements( draw->render,
356                                draw_elts,
357                                draw_count );
358
359   /* Done -- that was easy, wasn't it:
360    */
361   draw->render->release_vertices( draw->render );
362
363   return TRUE;
364}
365
366
367
368
369static void fetch_emit_finish( struct draw_pt_middle_end *middle )
370{
371   /* nothing to do */
372}
373
374static void fetch_emit_destroy( struct draw_pt_middle_end *middle )
375{
376   struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
377
378   if (feme->cache)
379      translate_cache_destroy(feme->cache);
380
381   FREE(middle);
382}
383
384
385struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw )
386{
387   struct fetch_emit_middle_end *fetch_emit = CALLOC_STRUCT( fetch_emit_middle_end );
388   if (fetch_emit == NULL)
389      return NULL;
390
391   fetch_emit->cache = translate_cache_create();
392   if (!fetch_emit->cache) {
393      FREE(fetch_emit);
394      return NULL;
395   }
396
397   fetch_emit->base.prepare    = fetch_emit_prepare;
398   fetch_emit->base.run        = fetch_emit_run;
399   fetch_emit->base.run_linear = fetch_emit_run_linear;
400   fetch_emit->base.run_linear_elts = fetch_emit_run_linear_elts;
401   fetch_emit->base.finish     = fetch_emit_finish;
402   fetch_emit->base.destroy    = fetch_emit_destroy;
403
404   fetch_emit->draw = draw;
405
406   return &fetch_emit->base;
407}
408
409