draw_pt_fetch_shade_pipeline.c revision 683e7091a953204c9aee1410ac44be3b69bae9fc 
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			  fpme->vertex_size );
81
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
91
92   if (!(opt & PT_PIPELINE)) {
93      draw_pt_emit_prepare( fpme->emit,
94			    prim,
95                            max_vertices );
96
97      *max_vertices = MAX2( *max_vertices,
98                            DRAW_PIPE_MAX_VERTICES );
99   }
100   else {
101      *max_vertices = DRAW_PIPE_MAX_VERTICES;
102   }
103
104   /* return even number */
105   *max_vertices = *max_vertices & ~1;
106
107   /* No need to prepare the shader.
108    */
109   vs->prepare(vs, draw);
110}
111
112
113
114static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
115                                const unsigned *fetch_elts,
116                                unsigned fetch_count,
117                                const ushort *draw_elts,
118                                unsigned draw_count )
119{
120   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
121   struct draw_context *draw = fpme->draw;
122   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
123   unsigned opt = fpme->opt;
124   unsigned alloc_count = align( fetch_count, 4 );
125
126   struct vertex_header *pipeline_verts =
127      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
128
129   if (!pipeline_verts) {
130      /* Not much we can do here - just skip the rendering.
131       */
132      assert(0);
133      return;
134   }
135
136   /* Fetch into our vertex buffer
137    */
138   draw_pt_fetch_run( fpme->fetch,
139		      fetch_elts,
140		      fetch_count,
141		      (char *)pipeline_verts );
142
143   /* Run the shader, note that this overwrites the data[] parts of
144    * the pipeline verts.  If there is no shader, eg if
145    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
146    * already in the correct place.
147    */
148   if (opt & PT_SHADE)
149   {
150      shader->run_linear(shader,
151			 (const float (*)[4])pipeline_verts->data,
152			 (      float (*)[4])pipeline_verts->data,
153			 (const float (*)[4])draw->pt.user.constants,
154			 fetch_count,
155			 fpme->vertex_size,
156			 fpme->vertex_size);
157   }
158
159   if (draw_pt_post_vs_run( fpme->post_vs,
160			    pipeline_verts,
161			    fetch_count,
162			    fpme->vertex_size ))
163   {
164      opt |= PT_PIPELINE;
165   }
166
167   /* Do we need to run the pipeline?
168    */
169   if (opt & PT_PIPELINE) {
170      draw_pipeline_run( fpme->draw,
171                         fpme->prim,
172                         pipeline_verts,
173                         fetch_count,
174                         fpme->vertex_size,
175                         draw_elts,
176                         draw_count );
177   }
178   else {
179      draw_pt_emit( fpme->emit,
180		    (const float (*)[4])pipeline_verts->data,
181		    fetch_count,
182		    fpme->vertex_size,
183		    draw_elts,
184		    draw_count );
185   }
186
187
188   FREE(pipeline_verts);
189}
190
191
192static void fetch_pipeline_linear_run( struct draw_pt_middle_end *middle,
193                                       unsigned start,
194                                       unsigned count)
195{
196   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
197   struct draw_context *draw = fpme->draw;
198   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
199   unsigned opt = fpme->opt;
200   unsigned alloc_count = align( count, 4 );
201
202   struct vertex_header *pipeline_verts =
203      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
204
205   if (!pipeline_verts) {
206      /* Not much we can do here - just skip the rendering.
207       */
208      assert(0);
209      return;
210   }
211
212   /* Fetch into our vertex buffer
213    */
214   draw_pt_fetch_run_linear( fpme->fetch,
215                             start,
216                             count,
217                             (char *)pipeline_verts );
218
219   /* Run the shader, note that this overwrites the data[] parts of
220    * the pipeline verts.  If there is no shader, ie if
221    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
222    * already in the correct place.
223    */
224   if (opt & PT_SHADE)
225   {
226      shader->run_linear(shader,
227			 (const float (*)[4])pipeline_verts->data,
228			 (      float (*)[4])pipeline_verts->data,
229			 (const float (*)[4])draw->pt.user.constants,
230			 count,
231			 fpme->vertex_size,
232			 fpme->vertex_size);
233   }
234
235   if (draw_pt_post_vs_run( fpme->post_vs,
236			    pipeline_verts,
237			    count,
238			    fpme->vertex_size ))
239   {
240      opt |= PT_PIPELINE;
241   }
242
243   /* Do we need to run the pipeline?
244    */
245   if (opt & PT_PIPELINE) {
246      draw_pipeline_run_linear( fpme->draw,
247                                fpme->prim,
248                                pipeline_verts,
249                                count,
250                                fpme->vertex_size);
251   }
252   else {
253      draw_pt_emit_linear( fpme->emit,
254                           (const float (*)[4])pipeline_verts->data,
255                           fpme->vertex_size,
256                           count );
257   }
258
259   FREE(pipeline_verts);
260}
261
262
263
264static boolean fetch_pipeline_linear_run_elts( struct draw_pt_middle_end *middle,
265                                            unsigned start,
266                                            unsigned count,
267                                            const ushort *draw_elts,
268                                            unsigned draw_count )
269{
270   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
271   struct draw_context *draw = fpme->draw;
272   struct draw_vertex_shader *shader = draw->vs.vertex_shader;
273   unsigned opt = fpme->opt;
274   unsigned alloc_count = align( count, 4 );
275
276   struct vertex_header *pipeline_verts =
277      (struct vertex_header *)MALLOC(fpme->vertex_size * alloc_count);
278
279   if (!pipeline_verts)
280      return FALSE;
281
282   /* Fetch into our vertex buffer
283    */
284   draw_pt_fetch_run_linear( fpme->fetch,
285                             start,
286                             count,
287                             (char *)pipeline_verts );
288
289   /* Run the shader, note that this overwrites the data[] parts of
290    * the pipeline verts.  If there is no shader, ie if
291    * bypass_vs_clip_and_viewport, then the inputs == outputs, and are
292    * already in the correct place.
293    */
294   if (opt & PT_SHADE)
295   {
296      shader->run_linear(shader,
297			 (const float (*)[4])pipeline_verts->data,
298			 (      float (*)[4])pipeline_verts->data,
299			 (const float (*)[4])draw->pt.user.constants,
300			 count,
301			 fpme->vertex_size,
302			 fpme->vertex_size);
303   }
304
305   if (draw_pt_post_vs_run( fpme->post_vs,
306			    pipeline_verts,
307			    count,
308			    fpme->vertex_size ))
309   {
310      opt |= PT_PIPELINE;
311   }
312
313   /* Do we need to run the pipeline?
314    */
315   if (opt & PT_PIPELINE) {
316      draw_pipeline_run( fpme->draw,
317                         fpme->prim,
318                         pipeline_verts,
319                         count,
320                         fpme->vertex_size,
321                         draw_elts,
322                         draw_count );
323   }
324   else {
325      draw_pt_emit( fpme->emit,
326		    (const float (*)[4])pipeline_verts->data,
327		    count,
328		    fpme->vertex_size,
329		    draw_elts,
330		    draw_count );
331   }
332
333   FREE(pipeline_verts);
334   return TRUE;
335}
336
337
338
339static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
340{
341   /* nothing to do */
342}
343
344static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
345{
346   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
347
348   if (fpme->fetch)
349      draw_pt_fetch_destroy( fpme->fetch );
350
351   if (fpme->emit)
352      draw_pt_emit_destroy( fpme->emit );
353
354   if (fpme->post_vs)
355      draw_pt_post_vs_destroy( fpme->post_vs );
356
357   FREE(middle);
358}
359
360
361struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
362{
363   struct fetch_pipeline_middle_end *fpme = CALLOC_STRUCT( fetch_pipeline_middle_end );
364   if (!fpme)
365      goto fail;
366
367   fpme->base.prepare        = fetch_pipeline_prepare;
368   fpme->base.run            = fetch_pipeline_run;
369   fpme->base.run_linear     = fetch_pipeline_linear_run;
370   fpme->base.run_linear_elts = fetch_pipeline_linear_run_elts;
371   fpme->base.finish         = fetch_pipeline_finish;
372   fpme->base.destroy        = fetch_pipeline_destroy;
373
374   fpme->draw = draw;
375
376   fpme->fetch = draw_pt_fetch_create( draw );
377   if (!fpme->fetch)
378      goto fail;
379
380   fpme->post_vs = draw_pt_post_vs_create( draw );
381   if (!fpme->post_vs)
382      goto fail;
383
384   fpme->emit = draw_pt_emit_create( draw );
385   if (!fpme->emit)
386      goto fail;
387
388   return &fpme->base;
389
390 fail:
391   if (fpme)
392      fetch_pipeline_destroy( &fpme->base );
393
394   return NULL;
395}
396