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
34 #include "util/u_math.h"
35 #include "util/u_memory.h"
36 #include "draw/draw_context.h"
37 #include "draw/draw_private.h"
38 #include "draw/draw_vbuf.h"
39 #include "draw/draw_vertex.h"
40 #include "draw/draw_pt.h"
41 #include "draw/draw_vs.h"
42
43
44 struct fetch_shade_emit;
45
46
47 /* Prototype fetch, shade, emit-hw-verts all in one go.
48 */
49 struct fetch_shade_emit {
50 struct draw_pt_middle_end base;
51 struct draw_context *draw;
52
53 /* Temporaries:
54 */
55 const float *constants;
56 unsigned pitch[PIPE_MAX_ATTRIBS];
57 const ubyte *src[PIPE_MAX_ATTRIBS];
58 unsigned prim;
59
60 struct draw_vs_variant_key key;
61 struct draw_vs_variant *active;
62
63 const struct vertex_info *vinfo;
64 };
65
66
67
68 static void
fse_prepare(struct draw_pt_middle_end * middle,unsigned prim,unsigned opt,unsigned * max_vertices)69 fse_prepare(struct draw_pt_middle_end *middle,
70 unsigned prim,
71 unsigned opt,
72 unsigned *max_vertices)
73 {
74 struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
75 struct draw_context *draw = fse->draw;
76 unsigned num_vs_inputs = draw->vs.vertex_shader->info.num_inputs;
77 const struct vertex_info *vinfo;
78 unsigned i;
79 unsigned nr_vbs = 0;
80
81 /* Can't support geometry shader on this path.
82 */
83 assert(!draw->gs.geometry_shader);
84
85 draw->render->set_primitive(draw->render, prim);
86
87 /* Must do this after set_primitive() above:
88 */
89 fse->vinfo = vinfo = draw->render->get_vertex_info(draw->render);
90
91 fse->key.output_stride = vinfo->size * 4;
92 fse->key.nr_outputs = vinfo->num_attribs;
93 fse->key.nr_inputs = num_vs_inputs;
94
95 fse->key.nr_elements = MAX2(fse->key.nr_outputs, /* outputs - translate to hw format */
96 fse->key.nr_inputs); /* inputs - fetch from api format */
97
98 fse->key.viewport = !draw->identity_viewport;
99 fse->key.clip = draw->clip_xy || draw->clip_z || draw->clip_user;
100 fse->key.const_vbuffers = 0;
101
102 memset(fse->key.element, 0,
103 fse->key.nr_elements * sizeof(fse->key.element[0]));
104
105 for (i = 0; i < num_vs_inputs; i++) {
106 const struct pipe_vertex_element *src = &draw->pt.vertex_element[i];
107 fse->key.element[i].in.format = src->src_format;
108
109 /* Consider ignoring these, ie make generated programs
110 * independent of this state:
111 */
112 fse->key.element[i].in.buffer = src->vertex_buffer_index;
113 fse->key.element[i].in.offset = src->src_offset;
114 nr_vbs = MAX2(nr_vbs, src->vertex_buffer_index + 1);
115 }
116
117 for (i = 0; i < 5 && i < nr_vbs; i++) {
118 if (draw->pt.vertex_buffer[i].stride == 0)
119 fse->key.const_vbuffers |= (1<<i);
120 }
121
122 if (0) debug_printf("%s: lookup const_vbuffers: %x\n", __FUNCTION__, fse->key.const_vbuffers);
123
124 {
125 unsigned dst_offset = 0;
126
127 for (i = 0; i < vinfo->num_attribs; i++) {
128 unsigned emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
129
130 /* doesn't handle EMIT_OMIT */
131 assert(emit_sz != 0);
132
133 /* The elements in the key correspond to vertex shader output
134 * numbers, not to positions in the hw vertex description --
135 * that's handled by the output_offset field.
136 */
137 fse->key.element[i].out.format = vinfo->attrib[i].emit;
138 fse->key.element[i].out.vs_output = vinfo->attrib[i].src_index;
139 fse->key.element[i].out.offset = dst_offset;
140
141 dst_offset += emit_sz;
142 assert(fse->key.output_stride >= dst_offset);
143 }
144 }
145
146 fse->active = draw_vs_lookup_variant( draw->vs.vertex_shader,
147 &fse->key );
148
149 if (!fse->active) {
150 assert(0);
151 return ;
152 }
153
154 if (0) debug_printf("%s: found const_vbuffers: %x\n", __FUNCTION__,
155 fse->active->key.const_vbuffers);
156
157 /* Now set buffer pointers:
158 */
159 for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
160 fse->active->set_buffer( fse->active,
161 i,
162 ((const ubyte *) draw->pt.user.vbuffer[i] +
163 draw->pt.vertex_buffer[i].buffer_offset),
164 draw->pt.vertex_buffer[i].stride,
165 draw->pt.max_index );
166 }
167
168 *max_vertices = (draw->render->max_vertex_buffer_bytes /
169 (vinfo->size * 4));
170
171 /* Probably need to do this somewhere (or fix exec shader not to
172 * need it):
173 */
174 if (1) {
175 struct draw_vertex_shader *vs = draw->vs.vertex_shader;
176 vs->prepare(vs, draw);
177 }
178 }
179
180
181
182 static void
fse_run_linear(struct draw_pt_middle_end * middle,unsigned start,unsigned count,unsigned prim_flags)183 fse_run_linear(struct draw_pt_middle_end *middle,
184 unsigned start,
185 unsigned count,
186 unsigned prim_flags)
187 {
188 struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
189 struct draw_context *draw = fse->draw;
190 char *hw_verts;
191
192 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
193 */
194 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
195
196 if (!draw->render->allocate_vertices( draw->render,
197 (ushort)fse->key.output_stride,
198 (ushort)count ))
199 goto fail;
200
201 hw_verts = draw->render->map_vertices( draw->render );
202 if (!hw_verts)
203 goto fail;
204
205 /* Single routine to fetch vertices, run shader and emit HW verts.
206 * Clipping is done elsewhere -- either by the API or on hardware,
207 * or for some other reason not required...
208 */
209 fse->active->run_linear( fse->active,
210 start, count,
211 hw_verts );
212
213 if (0) {
214 unsigned i;
215 for (i = 0; i < count; i++) {
216 debug_printf("\n\n%s vertex %d: (stride %d, offset %d)\n", __FUNCTION__, i,
217 fse->key.output_stride,
218 fse->key.output_stride * i);
219
220 draw_dump_emitted_vertex( fse->vinfo,
221 (const uint8_t *)hw_verts + fse->key.output_stride * i );
222 }
223 }
224
225 draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
226
227 /* Draw arrays path to avoid re-emitting index list again and
228 * again.
229 */
230 draw->render->draw_arrays( draw->render,
231 0,
232 count );
233
234 draw->render->release_vertices( draw->render );
235
236 return;
237
238 fail:
239 debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
240 return;
241 }
242
243
244 static void
fse_run(struct draw_pt_middle_end * middle,const unsigned * fetch_elts,unsigned fetch_count,const ushort * draw_elts,unsigned draw_count,unsigned prim_flags)245 fse_run(struct draw_pt_middle_end *middle,
246 const unsigned *fetch_elts,
247 unsigned fetch_count,
248 const ushort *draw_elts,
249 unsigned draw_count,
250 unsigned prim_flags )
251 {
252 struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
253 struct draw_context *draw = fse->draw;
254 void *hw_verts;
255
256 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
257 */
258 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
259
260 if (!draw->render->allocate_vertices( draw->render,
261 (ushort)fse->key.output_stride,
262 (ushort)fetch_count ))
263 goto fail;
264
265 hw_verts = draw->render->map_vertices( draw->render );
266 if (!hw_verts)
267 goto fail;
268
269 /* Single routine to fetch vertices, run shader and emit HW verts.
270 */
271 fse->active->run_elts( fse->active,
272 fetch_elts,
273 fetch_count,
274 hw_verts );
275
276 if (0) {
277 unsigned i;
278 for (i = 0; i < fetch_count; i++) {
279 debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
280 draw_dump_emitted_vertex( fse->vinfo,
281 (const uint8_t *)hw_verts +
282 fse->key.output_stride * i );
283 }
284 }
285
286 draw->render->unmap_vertices( draw->render, 0, (ushort)(fetch_count - 1) );
287
288 draw->render->draw_elements( draw->render,
289 draw_elts,
290 draw_count );
291
292 draw->render->release_vertices( draw->render );
293 return;
294
295 fail:
296 debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
297 return;
298 }
299
300
301
302 static boolean
fse_run_linear_elts(struct draw_pt_middle_end * middle,unsigned start,unsigned count,const ushort * draw_elts,unsigned draw_count,unsigned prim_flags)303 fse_run_linear_elts(struct draw_pt_middle_end *middle,
304 unsigned start,
305 unsigned count,
306 const ushort *draw_elts,
307 unsigned draw_count,
308 unsigned prim_flags)
309 {
310 struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
311 struct draw_context *draw = fse->draw;
312 char *hw_verts;
313
314 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
315 */
316 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
317
318 if (!draw->render->allocate_vertices( draw->render,
319 (ushort)fse->key.output_stride,
320 (ushort)count ))
321 return FALSE;
322
323 hw_verts = draw->render->map_vertices( draw->render );
324 if (!hw_verts)
325 return FALSE;
326
327 /* Single routine to fetch vertices, run shader and emit HW verts.
328 * Clipping is done elsewhere -- either by the API or on hardware,
329 * or for some other reason not required...
330 */
331 fse->active->run_linear( fse->active,
332 start, count,
333 hw_verts );
334
335 draw->render->draw_elements( draw->render,
336 draw_elts,
337 draw_count );
338
339 draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
340
341 draw->render->release_vertices( draw->render );
342
343 return TRUE;
344 }
345
346
347
348 static void
fse_finish(struct draw_pt_middle_end * middle)349 fse_finish(struct draw_pt_middle_end *middle)
350 {
351 }
352
353
354 static void
fse_destroy(struct draw_pt_middle_end * middle)355 fse_destroy(struct draw_pt_middle_end *middle)
356 {
357 FREE(middle);
358 }
359
360
361 struct draw_pt_middle_end *
draw_pt_middle_fse(struct draw_context * draw)362 draw_pt_middle_fse(struct draw_context *draw)
363 {
364 struct fetch_shade_emit *fse = CALLOC_STRUCT(fetch_shade_emit);
365 if (!fse)
366 return NULL;
367
368 fse->base.prepare = fse_prepare;
369 fse->base.run = fse_run;
370 fse->base.run_linear = fse_run_linear;
371 fse->base.run_linear_elts = fse_run_linear_elts;
372 fse->base.finish = fse_finish;
373 fse->base.destroy = fse_destroy;
374 fse->draw = draw;
375
376 return &fse->base;
377 }
378