draw_gs.c revision bef196c7929606bb8c7e9c06fe83a90fc0d95f09 
1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
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 "draw_gs.h"
29
30#include "draw_private.h"
31#include "draw_context.h"
32
33#include "tgsi/tgsi_parse.h"
34#include "tgsi/tgsi_exec.h"
35
36#include "pipe/p_shader_tokens.h"
37
38#include "util/u_math.h"
39#include "util/u_memory.h"
40#include "util/u_prim.h"
41
42/* fixme: move it from here */
43#define MAX_PRIMITIVES 64
44
45boolean
46draw_gs_init( struct draw_context *draw )
47{
48   draw->gs.tgsi.machine = tgsi_exec_machine_create();
49   if (!draw->gs.tgsi.machine)
50      return FALSE;
51
52   draw->gs.tgsi.machine->Primitives = align_malloc(
53      MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector), 16);
54   if (!draw->gs.tgsi.machine->Primitives)
55      return FALSE;
56   memset(draw->gs.tgsi.machine->Primitives, 0,
57          MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector));
58
59   return TRUE;
60}
61
62void draw_gs_destroy( struct draw_context *draw )
63{
64   if (!draw->gs.tgsi.machine)
65      return;
66
67   align_free(draw->gs.tgsi.machine->Primitives);
68
69   tgsi_exec_machine_destroy(draw->gs.tgsi.machine);
70}
71
72void
73draw_gs_set_constants(struct draw_context *draw,
74                      unsigned slot,
75                      const void *constants,
76                      unsigned size)
77{
78   /* noop. added here for symmetry with the VS
79    * code and in case we'll ever want to allign
80    * the constants, e.g. when we'll change to a
81    * different interpreter */
82}
83
84
85struct draw_geometry_shader *
86draw_create_geometry_shader(struct draw_context *draw,
87                            const struct pipe_shader_state *state)
88{
89   struct draw_geometry_shader *gs;
90   int i;
91
92   gs = CALLOC_STRUCT(draw_geometry_shader);
93
94   if (!gs)
95      return NULL;
96
97   gs->draw = draw;
98   gs->state = *state;
99   gs->state.tokens = tgsi_dup_tokens(state->tokens);
100   if (!gs->state.tokens) {
101      FREE(gs);
102      return NULL;
103   }
104
105   tgsi_scan_shader(state->tokens, &gs->info);
106
107   /* setup the defaults */
108   gs->input_primitive = PIPE_PRIM_TRIANGLES;
109   gs->output_primitive = PIPE_PRIM_TRIANGLE_STRIP;
110   gs->max_output_vertices = 32;
111
112   for (i = 0; i < gs->info.num_properties; ++i) {
113      if (gs->info.properties[i].name ==
114          TGSI_PROPERTY_GS_INPUT_PRIM)
115         gs->input_primitive = gs->info.properties[i].data[0];
116      else if (gs->info.properties[i].name ==
117               TGSI_PROPERTY_GS_OUTPUT_PRIM)
118         gs->output_primitive = gs->info.properties[i].data[0];
119      else if (gs->info.properties[i].name ==
120               TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES)
121         gs->max_output_vertices = gs->info.properties[i].data[0];
122   }
123
124   gs->machine = draw->gs.tgsi.machine;
125
126   if (gs)
127   {
128      uint i;
129      for (i = 0; i < gs->info.num_outputs; i++) {
130         if (gs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
131             gs->info.output_semantic_index[i] == 0)
132            gs->position_output = i;
133      }
134   }
135
136   return gs;
137}
138
139void draw_bind_geometry_shader(struct draw_context *draw,
140                               struct draw_geometry_shader *dgs)
141{
142   draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
143
144   if (dgs) {
145      draw->gs.geometry_shader = dgs;
146      draw->gs.num_gs_outputs = dgs->info.num_outputs;
147      draw->gs.position_output = dgs->position_output;
148      draw_geometry_shader_prepare(dgs, draw);
149   }
150   else {
151      draw->gs.geometry_shader = NULL;
152      draw->gs.num_gs_outputs = 0;
153   }
154}
155
156void draw_delete_geometry_shader(struct draw_context *draw,
157                                 struct draw_geometry_shader *dgs)
158{
159   FREE(dgs);
160}
161
162/*#define DEBUG_OUTPUTS 1*/
163static INLINE void
164draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
165                            int num_primitives,
166                            float (**p_output)[4])
167{
168   struct tgsi_exec_machine *machine = shader->machine;
169   unsigned prim_idx, j, slot;
170   float (*output)[4];
171
172   output = *p_output;
173
174   /* Unswizzle all output results.
175    */
176
177   for (prim_idx = 0; prim_idx < num_primitives; ++prim_idx) {
178      unsigned num_verts_per_prim = machine->Primitives[prim_idx];
179      shader->primitive_lengths[prim_idx +   shader->emitted_primitives] =
180         machine->Primitives[prim_idx];
181      shader->emitted_vertices += num_verts_per_prim;
182      for (j = 0; j < num_verts_per_prim; j++) {
183         int idx = (prim_idx * num_verts_per_prim + j) *
184                   shader->info.num_outputs;
185#ifdef DEBUG_OUTPUTS
186         debug_printf("%d) Output vert:\n", idx / shader->info.num_outputs);
187#endif
188         for (slot = 0; slot < shader->info.num_outputs; slot++) {
189            output[slot][0] = machine->Outputs[idx + slot].xyzw[0].f[0];
190            output[slot][1] = machine->Outputs[idx + slot].xyzw[1].f[0];
191            output[slot][2] = machine->Outputs[idx + slot].xyzw[2].f[0];
192            output[slot][3] = machine->Outputs[idx + slot].xyzw[3].f[0];
193#ifdef DEBUG_OUTPUTS
194            debug_printf("\t%d: %f %f %f %f\n", slot,
195                         output[slot][0],
196                         output[slot][1],
197                         output[slot][2],
198                         output[slot][3]);
199#endif
200            debug_assert(!util_is_inf_or_nan(output[slot][0]));
201         }
202         output = (float (*)[4])((char *)output + shader->vertex_size);
203      }
204   }
205   *p_output = output;
206         shader->emitted_primitives += num_primitives;
207}
208
209/*#define DEBUG_INPUTS 1*/
210static void draw_fetch_gs_input(struct draw_geometry_shader *shader,
211                                unsigned *indices,
212                                unsigned num_vertices,
213                                unsigned prim_idx)
214{
215   struct tgsi_exec_machine *machine = shader->machine;
216   unsigned slot, vs_slot, i;
217   unsigned input_vertex_stride = shader->input_vertex_stride;
218   const float (*input_ptr)[4];
219
220   input_ptr = shader->input;
221
222   for (i = 0; i < num_vertices; ++i) {
223      const float (*input)[4];
224#if DEBUG_INPUTS
225      debug_printf("%d) vertex index = %d (prim idx = %d)\n",
226                   i, indices[i], prim_idx);
227#endif
228      input = (const float (*)[4])(
229         (const char *)input_ptr + (indices[i] * input_vertex_stride));
230      for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
231         unsigned idx = i * TGSI_EXEC_MAX_INPUT_ATTRIBS + slot;
232         if (shader->info.input_semantic_name[slot] == TGSI_SEMANTIC_PRIMID) {
233            machine->Inputs[idx].xyzw[0].f[prim_idx] =
234               (float)shader->in_prim_idx;
235            machine->Inputs[idx].xyzw[1].f[prim_idx] =
236               (float)shader->in_prim_idx;
237            machine->Inputs[idx].xyzw[2].f[prim_idx] =
238               (float)shader->in_prim_idx;
239            machine->Inputs[idx].xyzw[3].f[prim_idx] =
240               (float)shader->in_prim_idx;
241         } else {
242#if DEBUG_INPUTS
243            debug_printf("\tSlot = %d, vs_slot = %d, idx = %d:\n",
244                         slot, vs_slot, idx);
245#endif
246#if 1
247            assert(!util_is_inf_or_nan(input[vs_slot][0]));
248            assert(!util_is_inf_or_nan(input[vs_slot][1]));
249            assert(!util_is_inf_or_nan(input[vs_slot][2]));
250            assert(!util_is_inf_or_nan(input[vs_slot][3]));
251#endif
252            machine->Inputs[idx].xyzw[0].f[prim_idx] = input[vs_slot][0];
253            machine->Inputs[idx].xyzw[1].f[prim_idx] = input[vs_slot][1];
254            machine->Inputs[idx].xyzw[2].f[prim_idx] = input[vs_slot][2];
255            machine->Inputs[idx].xyzw[3].f[prim_idx] = input[vs_slot][3];
256#if DEBUG_INPUTS
257            debug_printf("\t\t%f %f %f %f\n",
258                         machine->Inputs[idx].xyzw[0].f[prim_idx],
259                         machine->Inputs[idx].xyzw[1].f[prim_idx],
260                         machine->Inputs[idx].xyzw[2].f[prim_idx],
261                         machine->Inputs[idx].xyzw[3].f[prim_idx]);
262#endif
263            ++vs_slot;
264         }
265      }
266   }
267}
268
269static void gs_flush(struct draw_geometry_shader *shader,
270                     unsigned input_primitives)
271{
272   unsigned out_prim_count;
273   struct tgsi_exec_machine *machine = shader->machine;
274
275   debug_assert(input_primitives > 0 &&
276                input_primitives < 4);
277
278   tgsi_set_exec_mask(machine,
279                      1,
280                      input_primitives > 1,
281                      input_primitives > 2,
282                      input_primitives > 3);
283
284   /* run interpreter */
285   tgsi_exec_machine_run(machine);
286
287   out_prim_count =
288      machine->Temps[TGSI_EXEC_TEMP_PRIMITIVE_I].xyzw[TGSI_EXEC_TEMP_PRIMITIVE_C].u[0];
289
290#if 0
291   debug_printf("PRIM emitted prims = %d (verts=%d), cur prim count = %d\n",
292                shader->emitted_primitives, shader->emitted_vertices,
293                out_prim_count);
294#endif
295   draw_geometry_fetch_outputs(shader, out_prim_count,
296                               &shader->tmp_output);
297}
298
299static void gs_point(struct draw_geometry_shader *shader,
300                     int idx)
301{
302   unsigned indices[1];
303
304   indices[0] = idx;
305
306   draw_fetch_gs_input(shader, indices, 1, 0);
307   ++shader->in_prim_idx;
308
309   gs_flush(shader, 1);
310}
311
312static void gs_line(struct draw_geometry_shader *shader,
313                    int i0, int i1)
314{
315   unsigned indices[2];
316
317   indices[0] = i0;
318   indices[1] = i1;
319
320   draw_fetch_gs_input(shader, indices, 2, 0);
321   ++shader->in_prim_idx;
322
323   gs_flush(shader, 1);
324}
325
326static void gs_line_adj(struct draw_geometry_shader *shader,
327                        int i0, int i1, int i2, int i3)
328{
329   unsigned indices[4];
330
331   indices[0] = i0;
332   indices[1] = i1;
333   indices[2] = i2;
334   indices[3] = i3;
335
336   draw_fetch_gs_input(shader, indices, 4, 0);
337   ++shader->in_prim_idx;
338
339   gs_flush(shader, 1);
340}
341
342static void gs_tri(struct draw_geometry_shader *shader,
343                   int i0, int i1, int i2)
344{
345   unsigned indices[3];
346
347   indices[0] = i0;
348   indices[1] = i1;
349   indices[2] = i2;
350
351   draw_fetch_gs_input(shader, indices, 3, 0);
352   ++shader->in_prim_idx;
353
354   gs_flush(shader, 1);
355}
356
357static void gs_tri_adj(struct draw_geometry_shader *shader,
358                       int i0, int i1, int i2,
359                       int i3, int i4, int i5)
360{
361   unsigned indices[6];
362
363   indices[0] = i0;
364   indices[1] = i1;
365   indices[2] = i2;
366   indices[3] = i3;
367   indices[4] = i4;
368   indices[5] = i5;
369
370   draw_fetch_gs_input(shader, indices, 6, 0);
371   ++shader->in_prim_idx;
372
373   gs_flush(shader, 1);
374}
375
376#define FUNC         gs_run
377#define GET_ELT(idx) (idx)
378#include "draw_gs_tmp.h"
379
380
381#define FUNC         gs_run_elts
382#define LOCAL_VARS   const ushort *elts = input_prims->elts;
383#define GET_ELT(idx) (elts[idx])
384#include "draw_gs_tmp.h"
385
386
387/**
388 * Execute geometry shader using TGSI interpreter.
389 */
390int draw_geometry_shader_run(struct draw_geometry_shader *shader,
391                             const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
392                             const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
393                             const struct draw_vertex_info *input_verts,
394                             const struct draw_prim_info *input_prim,
395                             struct draw_vertex_info *output_verts,
396                             struct draw_prim_info *output_prims )
397{
398   const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
399   unsigned input_stride = input_verts->vertex_size;
400   unsigned vertex_size = input_verts->vertex_size;
401   struct tgsi_exec_machine *machine = shader->machine;
402   unsigned num_input_verts = input_prim->linear ?
403                              input_verts->count :
404                              input_prim->count;
405   unsigned num_in_primitives =
406      MAX2(u_gs_prims_for_vertices(input_prim->prim, num_input_verts),
407           u_gs_prims_for_vertices(shader->input_primitive, num_input_verts));
408   unsigned max_out_prims = u_gs_prims_for_vertices(shader->output_primitive,
409                                                    shader->max_output_vertices)
410                            * num_in_primitives;
411
412   output_verts->vertex_size = input_verts->vertex_size;
413   output_verts->stride = input_verts->vertex_size;
414   output_verts->verts =
415      (struct vertex_header *)MALLOC(input_verts->vertex_size *
416                                     num_in_primitives *
417                                     shader->max_output_vertices);
418
419
420#if 0
421   debug_printf("%s count = %d (in prims # = %d)\n",
422                __FUNCTION__, num_input_verts, num_in_primitives);
423   debug_printf("\tlinear = %d, prim_info->count = %d\n",
424                input_prim->linear, input_prim->count);
425   debug_printf("\tprimt pipe = %d, shader in = %d, shader out = %d, max out = %d\n",
426                input_prim->prim, shader->input_primitive,
427                shader->output_primitive,
428                shader->max_output_vertices);
429#endif
430
431   shader->emitted_vertices = 0;
432   shader->emitted_primitives = 0;
433   shader->vertex_size = vertex_size;
434   shader->tmp_output = (float (*)[4])output_verts->verts->data;
435   shader->in_prim_idx = 0;
436   shader->input_vertex_stride = input_stride;
437   shader->input = input;
438   if (shader->primitive_lengths) {
439      FREE(shader->primitive_lengths);
440   }
441   shader->primitive_lengths = MALLOC(max_out_prims * sizeof(unsigned));
442
443   tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
444                                  constants, constants_size);
445
446   if (input_prim->linear)
447      gs_run(shader, input_prim, input_verts,
448             output_prims, output_verts);
449   else
450      gs_run_elts(shader, input_prim, input_verts,
451                  output_prims, output_verts);
452
453   /* Update prim_info:
454    */
455   output_prims->linear = TRUE;
456   output_prims->elts = NULL;
457   output_prims->start = 0;
458   output_prims->count = shader->emitted_vertices;
459   output_prims->prim = shader->output_primitive;
460   output_prims->flags = 0x0;
461   output_prims->primitive_lengths = shader->primitive_lengths;
462   output_prims->primitive_count = shader->emitted_primitives;
463   output_verts->count = shader->emitted_vertices;
464
465#if 0
466   debug_printf("GS finished, prims = %d, verts = %d\n",
467                output_prims->primitive_count,
468                output_verts->count);
469#endif
470
471   return shader->emitted_vertices;
472}
473
474void draw_geometry_shader_delete(struct draw_geometry_shader *shader)
475{
476   FREE((void*) shader->state.tokens);
477   FREE(shader);
478}
479
480void draw_geometry_shader_prepare(struct draw_geometry_shader *shader,
481                                  struct draw_context *draw)
482{
483   if (shader && shader->machine->Tokens != shader->state.tokens) {
484      tgsi_exec_machine_bind_shader(shader->machine,
485                                    shader->state.tokens,
486                                    draw->gs.tgsi.num_samplers,
487                                    draw->gs.tgsi.samplers);
488   }
489}
490