draw_pt_fetch_shade_pipeline.c revision a08e348a84f57ed5e8bf5888f1ce13934d2ce8fa 
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#include "util/u_math.h"
29#include "util/u_memory.h"
30#include "draw/draw_context.h"
31#include "draw/draw_vbuf.h"
32#include "draw/draw_vertex.h"
33#include "draw/draw_pt.h"
34#include "draw/draw_vs.h"
35#include "translate/translate.h"
36
37
38struct fetch_pipeline_middle_end {
39   struct draw_pt_middle_end base;
40   struct draw_context *draw;
41
42   struct pt_emit *emit;
43   struct pt_fetch *fetch;
44   struct pt_post_vs *post_vs;
45
46   unsigned vertex_data_offset;
47   unsigned vertex_size;
48   unsigned prim;
49   unsigned opt;
50};
51
52
53static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
54                                    unsigned prim,
55				    unsigned opt,
56                                    unsigned *max_vertices )
57{
58   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
59   struct draw_context *draw = fpme->draw;
60   struct draw_vertex_shader *vs = draw->vs.vertex_shader;
61
62   /* Add one to num_outputs because the pipeline occasionally tags on
63    * an additional texcoord, eg for AA lines.
64    */
65   unsigned nr = MAX2( vs->info.num_inputs,
66		       vs->info.num_outputs + 1 );
67
68   fpme->prim = prim;
69   fpme->opt = opt;
70
71   /* Always leave room for the vertex header whether we need it or
72    * not.  It's hard to get rid of it in particular because of the
73    * viewport code in draw_pt_post_vs.c.
74    */
75   fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
76
77
78
79   draw_pt_fetch_prepare( fpme->fetch,
80                          vs->info.num_inputs,
81			  fpme->vertex_size );
82   /* XXX: it's not really gl rasterization rules we care about here,
83    * but gl vs dx9 clip spaces.
84    */
85   draw_pt_post_vs_prepare( fpme->post_vs,
86			    (boolean)draw->bypass_clipping,
87			    (boolean)(draw->identity_viewport ||
88                                      draw->rasterizer->bypass_vs_clip_and_viewport),
89			    (boolean)draw->rasterizer->gl_rasterization_rules,
90                            need_edgeflags );
91
92
93   if (!(opt & PT_PIPELINE)) {
94      draw_pt_emit_prepare( fpme->emit,
95			    prim,
96                            max_vertices );
97
98      *max_vertices = MAX2( *max_vertices,
99                            DRAW_PIPE_MAX_VERTICES );
100   }
101   else {
102      *max_vertices = DRAW_PIPE_MAX_VERTICES;
103   }
104
105   /* return even number */
106   *max_vertices = *max_vertices & ~1;
107
108   /* No need to prepare the shader.
109    */
110   vs->prepare(vs, draw);
111}
112
113
114
115static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
116                                const unsigned *fetch_elts,
117                                unsigned fetch_count,
118                                const ushort *draw_elts,
119                                unsigned draw_count )
120{
121   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
122   struct draw_context *draw = fpme->draw;
123   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
124   unsigned opt = fpme->opt;
125   unsigned alloc_count = align( fetch_count, 4 );
126
127   struct vertex_header *pipeline_verts =
128      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
129
130   if (!pipeline_verts) {
131      /* Not much we can do here - just skip the rendering.
132       */
133      assert(0);
134      return;
135   }
136
137   /* Fetch into our vertex buffer
138    */
139   draw_pt_fetch_run( fpme->fetch,
140		      fetch_elts,
141		      fetch_count,
142		      (char *)pipeline_verts );
143
144   /* Run the shader, note that this overwrites the data[] parts of
145    * the pipeline verts.  If there is no shader, eg if
146    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
147    * already in the correct place.
148    */
149   if (opt & PT_SHADE)
150   {
151      shader->run_linear(shader,
152			 (const float (*)[4])pipeline_verts->data,
153			 (      float (*)[4])pipeline_verts->data,
154			 (const float (*)[4])draw->pt.user.constants,
155			 fetch_count,
156			 fpme->vertex_size,
157			 fpme->vertex_size);
158   }
159
160   if (draw_pt_post_vs_run( fpme->post_vs,
161			    pipeline_verts,
162			    fetch_count,
163			    fpme->vertex_size ))
164   {
165      opt |= PT_PIPELINE;
166   }
167
168   /* Do we need to run the pipeline?
169    */
170   if (opt & PT_PIPELINE) {
171      draw_pipeline_run( fpme->draw,
172                         fpme->prim,
173                         pipeline_verts,
174                         fetch_count,
175                         fpme->vertex_size,
176                         draw_elts,
177                         draw_count );
178   }
179   else {
180      draw_pt_emit( fpme->emit,
181		    (const float (*)[4])pipeline_verts->data,
182		    fetch_count,
183		    fpme->vertex_size,
184		    draw_elts,
185		    draw_count );
186   }
187
188
189   FREE(pipeline_verts);
190}
191
192
193static void fetch_pipeline_linear_run( struct draw_pt_middle_end *middle,
194                                       unsigned start,
195                                       unsigned count)
196{
197   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
198   struct draw_context *draw = fpme->draw;
199   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
200   unsigned opt = fpme->opt;
201   unsigned alloc_count = align( count, 4 );
202
203   struct vertex_header *pipeline_verts =
204      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
205
206   if (!pipeline_verts) {
207      /* Not much we can do here - just skip the rendering.
208       */
209      assert(0);
210      return;
211   }
212
213   /* Fetch into our vertex buffer
214    */
215   draw_pt_fetch_run_linear( fpme->fetch,
216                             start,
217                             count,
218                             (char *)pipeline_verts );
219
220   /* Run the shader, note that this overwrites the data[] parts of
221    * the pipeline verts.  If there is no shader, ie if
222    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
223    * already in the correct place.
224    */
225   if (opt & PT_SHADE)
226   {
227      shader->run_linear(shader,
228			 (const float (*)[4])pipeline_verts->data,
229			 (      float (*)[4])pipeline_verts->data,
230			 (const float (*)[4])draw->pt.user.constants,
231			 count,
232			 fpme->vertex_size,
233			 fpme->vertex_size);
234   }
235
236   if (draw_pt_post_vs_run( fpme->post_vs,
237			    pipeline_verts,
238			    count,
239			    fpme->vertex_size ))
240   {
241      opt |= PT_PIPELINE;
242   }
243
244   /* Do we need to run the pipeline?
245    */
246   if (opt & PT_PIPELINE) {
247      draw_pipeline_run_linear( fpme->draw,
248                                fpme->prim,
249                                pipeline_verts,
250                                count,
251                                fpme->vertex_size);
252   }
253   else {
254      draw_pt_emit_linear( fpme->emit,
255                           (const float (*)[4])pipeline_verts->data,
256                           fpme->vertex_size,
257                           count );
258   }
259
260   FREE(pipeline_verts);
261}
262
263
264
265static boolean fetch_pipeline_linear_run_elts( struct draw_pt_middle_end *middle,
266                                            unsigned start,
267                                            unsigned count,
268                                            const ushort *draw_elts,
269                                            unsigned draw_count )
270{
271   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
272   struct draw_context *draw = fpme->draw;
273   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
274   unsigned opt = fpme->opt;
275   unsigned alloc_count = align( count, 4 );
276
277   struct vertex_header *pipeline_verts =
278      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
279
280   if (!pipeline_verts)
281      return FALSE;
282
283   /* Fetch into our vertex buffer
284    */
285   draw_pt_fetch_run_linear( fpme->fetch,
286                             start,
287                             count,
288                             (char *)pipeline_verts );
289
290   /* Run the shader, note that this overwrites the data[] parts of
291    * the pipeline verts.  If there is no shader, ie if
292    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
293    * already in the correct place.
294    */
295   if (opt & PT_SHADE)
296   {
297      shader->run_linear(shader,
298			 (const float (*)[4])pipeline_verts->data,
299			 (      float (*)[4])pipeline_verts->data,
300			 (const float (*)[4])draw->pt.user.constants,
301			 count,
302			 fpme->vertex_size,
303			 fpme->vertex_size);
304   }
305
306   if (draw_pt_post_vs_run( fpme->post_vs,
307			    pipeline_verts,
308			    count,
309			    fpme->vertex_size ))
310   {
311      opt |= PT_PIPELINE;
312   }
313
314   /* Do we need to run the pipeline?
315    */
316   if (opt & PT_PIPELINE) {
317      draw_pipeline_run( fpme->draw,
318                         fpme->prim,
319                         pipeline_verts,
320                         count,
321                         fpme->vertex_size,
322                         draw_elts,
323                         draw_count );
324   }
325   else {
326      draw_pt_emit( fpme->emit,
327		    (const float (*)[4])pipeline_verts->data,
328		    count,
329		    fpme->vertex_size,
330		    draw_elts,
331		    draw_count );
332   }
333
334   FREE(pipeline_verts);
335   return TRUE;
336}
337
338
339
340static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
341{
342   /* nothing to do */
343}
344
345static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
346{
347   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
348
349   if (fpme->fetch)
350      draw_pt_fetch_destroy( fpme->fetch );
351
352   if (fpme->emit)
353      draw_pt_emit_destroy( fpme->emit );
354
355   if (fpme->post_vs)
356      draw_pt_post_vs_destroy( fpme->post_vs );
357
358   FREE(middle);
359}
360
361
362struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
363{
364   struct fetch_pipeline_middle_end *fpme = CALLOC_STRUCT( fetch_pipeline_middle_end );
365   if (!fpme)
366      goto fail;
367
368   fpme->base.prepare        = fetch_pipeline_prepare;
369   fpme->base.run            = fetch_pipeline_run;
370   fpme->base.run_linear     = fetch_pipeline_linear_run;
371   fpme->base.run_linear_elts = fetch_pipeline_linear_run_elts;
372   fpme->base.finish         = fetch_pipeline_finish;
373   fpme->base.destroy        = fetch_pipeline_destroy;
374
375   fpme->draw = draw;
376
377   fpme->fetch = draw_pt_fetch_create( draw );
378   if (!fpme->fetch)
379      goto fail;
380
381   fpme->post_vs = draw_pt_post_vs_create( draw );
382   if (!fpme->post_vs)
383      goto fail;
384
385   fpme->emit = draw_pt_emit_create( draw );
386   if (!fpme->emit)
387      goto fail;
388
389   return &fpme->base;
390
391 fail:
392   if (fpme)
393      fetch_pipeline_destroy( &fpme->base );
394
395   return NULL;
396}
397