draw_pt_fetch_shade_pipeline.c revision 2ba6e1fa71be07a2d75abe2d085d485046c0932b 
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 "pipe/p_util.h"
29#include "draw/draw_context.h"
30#include "draw/draw_private.h"
31#include "draw/draw_vbuf.h"
32#include "draw/draw_vertex.h"
33#include "draw/draw_pt.h"
34
35struct fetch_pipeline_middle_end {
36   struct draw_pt_middle_end base;
37   struct draw_context *draw;
38
39   struct {
40      const ubyte *ptr;
41      unsigned pitch;
42      void (*fetch)( const void *from, float *attrib);
43      void (*emit)( const float *attrib, float **out );
44   } fetch[PIPE_MAX_ATTRIBS];
45
46   unsigned nr_fetch;
47   unsigned pipeline_vertex_size;
48   unsigned hw_vertex_size;
49   unsigned prim;
50};
51
52#if 0
53static void emit_R32_FLOAT( const float *attrib,
54                            float **out )
55{
56   (*out)[0] = attrib[0];
57   (*out) += 1;
58}
59
60static void emit_R32G32_FLOAT( const float *attrib,
61                               float **out )
62{
63   (*out)[0] = attrib[0];
64   (*out)[1] = attrib[1];
65   (*out) += 2;
66}
67
68static void emit_R32G32B32_FLOAT( const float *attrib,
69                                  float **out )
70{
71   (*out)[0] = attrib[0];
72   (*out)[1] = attrib[1];
73   (*out)[2] = attrib[2];
74   (*out) += 3;
75}
76#endif
77static void emit_R32G32B32A32_FLOAT( const float *attrib,
78                                     float **out )
79{
80   (*out)[0] = attrib[0];
81   (*out)[1] = attrib[1];
82   (*out)[2] = attrib[2];
83   (*out)[3] = attrib[3];
84   (*out) += 4;
85}
86
87static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
88                                    unsigned prim )
89{
90   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
91   struct draw_context *draw = fpme->draw;
92   unsigned i, nr = 0;
93   boolean ok;
94   const struct vertex_info *vinfo;
95
96   fpme->prim = prim;
97
98   ok = draw->render->set_primitive(draw->render, prim);
99   if (!ok) {
100      assert(0);
101      return;
102   }
103   /* Must do this after set_primitive() above:
104    */
105   vinfo = draw->render->get_vertex_info(draw->render);
106
107   /* Need to look at vertex shader inputs (we know it is a
108    * passthrough shader, so these define the outputs too).  If we
109    * were running a shader, we'd still be looking at the inputs at
110    * this point.
111    */
112   for (i = 0; i < draw->vertex_shader->info.num_inputs; i++) {
113      unsigned buf = draw->vertex_element[i].vertex_buffer_index;
114      enum pipe_format format  = draw->vertex_element[i].src_format;
115
116      fpme->fetch[nr].ptr = ((const ubyte *) draw->user.vbuffer[buf] +
117                            draw->vertex_buffer[buf].buffer_offset +
118                            draw->vertex_element[i].src_offset);
119
120      fpme->fetch[nr].pitch = draw->vertex_buffer[buf].pitch;
121      fpme->fetch[nr].fetch = draw_get_fetch_func( format );
122
123      /* Always do this -- somewhat redundant...
124       */
125      fpme->fetch[nr].emit = emit_R32G32B32A32_FLOAT;
126      nr++;
127   }
128
129   fpme->nr_fetch = nr;
130   //fpme->pipeline_vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
131   fpme->pipeline_vertex_size = (MAX_VERTEX_SIZE + 0x0f) & ~0x0f;
132   fpme->hw_vertex_size = vinfo->size * 4;
133}
134
135
136
137
138static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
139                                const unsigned *fetch_elts,
140                                unsigned fetch_count,
141                                const ushort *draw_elts,
142                                unsigned draw_count )
143{
144   struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
145   struct draw_context *draw = fpme->draw;
146   struct draw_vertex_shader *shader = draw->vertex_shader;
147   char *pipeline_verts;
148
149   pipeline_verts = MALLOC(fpme->pipeline_vertex_size *
150			   fetch_count);
151
152   if (!pipeline_verts) {
153      assert(0);
154      return;
155   }
156
157
158   /* Shade
159    */
160   shader->prepare(shader, draw);
161   if (shader->run(shader, draw, fetch_elts, fetch_count, pipeline_verts,
162                   fpme->pipeline_vertex_size)) {
163      /* Run the pipeline */
164      draw_pt_run_pipeline( fpme->draw,
165                            fpme->prim,
166                            pipeline_verts,
167                            fpme->pipeline_vertex_size,
168                            fetch_count,
169                            draw_elts,
170                            draw_count );
171   } else {
172      unsigned i, j;
173      void *hw_verts;
174      float *out;
175
176      /* XXX: need to flush to get prim_vbuf.c to release its allocation??
177       */
178      draw_do_flush( draw, DRAW_FLUSH_BACKEND );
179
180      hw_verts = draw->render->allocate_vertices(draw->render,
181                                                 (ushort)fpme->hw_vertex_size,
182                                                 (ushort)fetch_count);
183      if (!hw_verts) {
184         assert(0);
185         return;
186      }
187
188      out = (float *)hw_verts;
189      for (i = 0; i < fetch_count; i++) {
190         struct vertex_header *header =
191            (struct vertex_header*)(pipeline_verts + (fpme->pipeline_vertex_size * i));
192
193         for (j = 0; j < fpme->nr_fetch; j++) {
194            float *attrib = header->data[j];
195            /*debug_printf("emiting [%f, %f, %f, %f]\n",
196                         attrib[0], attrib[1],
197                         attrib[2], attrib[3]);*/
198            fpme->fetch[j].emit(attrib, &out);
199         }
200      }
201      /* XXX: Draw arrays path to avoid re-emitting index list again and
202       * again.
203       */
204      draw->render->draw(draw->render,
205                         draw_elts,
206                         draw_count);
207
208      draw->render->release_vertices(draw->render,
209                                     hw_verts,
210                                     fpme->hw_vertex_size,
211                                     fetch_count);
212   }
213
214
215   FREE(pipeline_verts);
216}
217
218
219
220static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
221{
222   /* nothing to do */
223}
224
225static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
226{
227   FREE(middle);
228}
229
230
231struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
232{
233   struct fetch_pipeline_middle_end *fetch_pipeline = CALLOC_STRUCT( fetch_pipeline_middle_end );
234
235   fetch_pipeline->base.prepare = fetch_pipeline_prepare;
236   fetch_pipeline->base.run     = fetch_pipeline_run;
237   fetch_pipeline->base.finish  = fetch_pipeline_finish;
238   fetch_pipeline->base.destroy = fetch_pipeline_destroy;
239
240   fetch_pipeline->draw = draw;
241
242   return &fetch_pipeline->base;
243}
244