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Merge branch 'xa_branch'
[mesa.git] / src / gallium / auxiliary / util / u_vbuf_mgr.c
1 /**************************************************************************
2 *
3 * Copyright 2011 Marek Olšák <maraeo@gmail.com>
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 AUTHORS 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_vbuf_mgr.h"
29
30 #include "util/u_format.h"
31 #include "util/u_inlines.h"
32 #include "util/u_memory.h"
33 #include "util/u_upload_mgr.h"
34 #include "translate/translate.h"
35 #include "translate/translate_cache.h"
36
37 /* Hardware vertex fetcher limitations can be described by this structure. */
38 struct u_vbuf_caps {
39 /* Vertex format CAPs. */
40 /* TRUE if hardware supports it. */
41 unsigned format_fixed32:1; /* PIPE_FORMAT_*32*_FIXED */
42 unsigned format_float16:1; /* PIPE_FORMAT_*16*_FLOAT */
43 unsigned format_float64:1; /* PIPE_FORMAT_*64*_FLOAT */
44 unsigned format_norm32:1; /* PIPE_FORMAT_*32*NORM */
45 unsigned format_scaled32:1; /* PIPE_FORMAT_*32*SCALED */
46
47 /* Whether vertex fetches don't have to be dword-aligned. */
48 /* TRUE if hardware supports it. */
49 unsigned fetch_dword_unaligned:1;
50 };
51
52 struct u_vbuf_mgr_elements {
53 unsigned count;
54 struct pipe_vertex_element ve[PIPE_MAX_ATTRIBS];
55
56 unsigned src_format_size[PIPE_MAX_ATTRIBS];
57
58 /* If (velem[i].src_format != native_format[i]), the vertex buffer
59 * referenced by the vertex element cannot be used for rendering and
60 * its vertex data must be translated to native_format[i]. */
61 enum pipe_format native_format[PIPE_MAX_ATTRIBS];
62 unsigned native_format_size[PIPE_MAX_ATTRIBS];
63
64 /* This might mean two things:
65 * - src_format != native_format, as discussed above.
66 * - src_offset % 4 != 0 (if the caps don't allow such an offset). */
67 boolean incompatible_layout;
68 };
69
70 struct u_vbuf_mgr_priv {
71 struct u_vbuf_mgr b;
72 struct u_vbuf_caps caps;
73 struct pipe_context *pipe;
74
75 struct translate_cache *translate_cache;
76 unsigned translate_vb_slot;
77
78 struct u_vbuf_mgr_elements *ve;
79 void *saved_ve, *fallback_ve;
80 boolean ve_binding_lock;
81
82 boolean any_user_vbs;
83 boolean incompatible_vb_layout;
84 };
85
86 static void u_vbuf_mgr_init_format_caps(struct u_vbuf_mgr_priv *mgr)
87 {
88 struct pipe_screen *screen = mgr->pipe->screen;
89
90 mgr->caps.format_fixed32 =
91 screen->is_format_supported(screen, PIPE_FORMAT_R32_FIXED, PIPE_BUFFER,
92 0, PIPE_BIND_VERTEX_BUFFER);
93
94 mgr->caps.format_float16 =
95 screen->is_format_supported(screen, PIPE_FORMAT_R16_FLOAT, PIPE_BUFFER,
96 0, PIPE_BIND_VERTEX_BUFFER);
97
98 mgr->caps.format_float64 =
99 screen->is_format_supported(screen, PIPE_FORMAT_R64_FLOAT, PIPE_BUFFER,
100 0, PIPE_BIND_VERTEX_BUFFER);
101
102 mgr->caps.format_norm32 =
103 screen->is_format_supported(screen, PIPE_FORMAT_R32_UNORM, PIPE_BUFFER,
104 0, PIPE_BIND_VERTEX_BUFFER) &&
105 screen->is_format_supported(screen, PIPE_FORMAT_R32_SNORM, PIPE_BUFFER,
106 0, PIPE_BIND_VERTEX_BUFFER);
107
108 mgr->caps.format_scaled32 =
109 screen->is_format_supported(screen, PIPE_FORMAT_R32_USCALED, PIPE_BUFFER,
110 0, PIPE_BIND_VERTEX_BUFFER) &&
111 screen->is_format_supported(screen, PIPE_FORMAT_R32_SSCALED, PIPE_BUFFER,
112 0, PIPE_BIND_VERTEX_BUFFER);
113 }
114
115 struct u_vbuf_mgr *
116 u_vbuf_mgr_create(struct pipe_context *pipe,
117 unsigned upload_buffer_size,
118 unsigned upload_buffer_alignment,
119 unsigned upload_buffer_bind,
120 enum u_fetch_alignment fetch_alignment)
121 {
122 struct u_vbuf_mgr_priv *mgr = CALLOC_STRUCT(u_vbuf_mgr_priv);
123
124 mgr->pipe = pipe;
125 mgr->translate_cache = translate_cache_create();
126
127 mgr->b.uploader = u_upload_create(pipe, upload_buffer_size,
128 upload_buffer_alignment,
129 upload_buffer_bind);
130
131 mgr->caps.fetch_dword_unaligned =
132 fetch_alignment == U_VERTEX_FETCH_BYTE_ALIGNED;
133
134 u_vbuf_mgr_init_format_caps(mgr);
135
136 return &mgr->b;
137 }
138
139 void u_vbuf_mgr_destroy(struct u_vbuf_mgr *mgrb)
140 {
141 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
142 unsigned i;
143
144 for (i = 0; i < mgr->b.nr_real_vertex_buffers; i++) {
145 pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);
146 pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
147 }
148
149 translate_cache_destroy(mgr->translate_cache);
150 u_upload_destroy(mgr->b.uploader);
151 FREE(mgr);
152 }
153
154
155 static enum u_vbuf_return_flags
156 u_vbuf_translate_begin(struct u_vbuf_mgr_priv *mgr,
157 int min_index, int max_index)
158 {
159 struct translate_key key;
160 struct translate_element *te;
161 unsigned tr_elem_index[PIPE_MAX_ATTRIBS];
162 struct translate *tr;
163 boolean vb_translated[PIPE_MAX_ATTRIBS] = {0};
164 uint8_t *vb_map[PIPE_MAX_ATTRIBS] = {0}, *out_map;
165 struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {0};
166 struct pipe_resource *out_buffer = NULL;
167 unsigned i, num_verts, out_offset;
168 struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];
169 boolean upload_flushed = FALSE;
170
171 memset(&key, 0, sizeof(key));
172 memset(tr_elem_index, 0xff, sizeof(tr_elem_index));
173
174 /* Initialize the translate key, i.e. the recipe how vertices should be
175 * translated. */
176 memset(&key, 0, sizeof key);
177 for (i = 0; i < mgr->ve->count; i++) {
178 struct pipe_vertex_buffer *vb =
179 &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];
180 enum pipe_format output_format = mgr->ve->native_format[i];
181 unsigned output_format_size = mgr->ve->native_format_size[i];
182
183 /* Check for support. */
184 if (mgr->ve->ve[i].src_format == mgr->ve->native_format[i] &&
185 (mgr->caps.fetch_dword_unaligned ||
186 (vb->buffer_offset % 4 == 0 &&
187 vb->stride % 4 == 0 &&
188 mgr->ve->ve[i].src_offset % 4 == 0))) {
189 continue;
190 }
191
192 /* Workaround for translate: output floats instead of halfs. */
193 switch (output_format) {
194 case PIPE_FORMAT_R16_FLOAT:
195 output_format = PIPE_FORMAT_R32_FLOAT;
196 output_format_size = 4;
197 break;
198 case PIPE_FORMAT_R16G16_FLOAT:
199 output_format = PIPE_FORMAT_R32G32_FLOAT;
200 output_format_size = 8;
201 break;
202 case PIPE_FORMAT_R16G16B16_FLOAT:
203 output_format = PIPE_FORMAT_R32G32B32_FLOAT;
204 output_format_size = 12;
205 break;
206 case PIPE_FORMAT_R16G16B16A16_FLOAT:
207 output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
208 output_format_size = 16;
209 break;
210 default:;
211 }
212
213 /* Add this vertex element. */
214 te = &key.element[key.nr_elements];
215 /*te->type;
216 te->instance_divisor;*/
217 te->input_buffer = mgr->ve->ve[i].vertex_buffer_index;
218 te->input_format = mgr->ve->ve[i].src_format;
219 te->input_offset = mgr->ve->ve[i].src_offset;
220 te->output_format = output_format;
221 te->output_offset = key.output_stride;
222
223 key.output_stride += output_format_size;
224 vb_translated[mgr->ve->ve[i].vertex_buffer_index] = TRUE;
225 tr_elem_index[i] = key.nr_elements;
226 key.nr_elements++;
227 }
228
229 /* Get a translate object. */
230 tr = translate_cache_find(mgr->translate_cache, &key);
231
232 /* Map buffers we want to translate. */
233 for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {
234 if (vb_translated[i]) {
235 struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[i];
236
237 vb_map[i] = pipe_buffer_map(mgr->pipe, vb->buffer,
238 PIPE_TRANSFER_READ, &vb_transfer[i]);
239
240 tr->set_buffer(tr, i,
241 vb_map[i] + vb->buffer_offset + vb->stride * min_index,
242 vb->stride, ~0);
243 }
244 }
245
246 /* Create and map the output buffer. */
247 num_verts = max_index + 1 - min_index;
248
249 u_upload_alloc(mgr->b.uploader,
250 key.output_stride * min_index,
251 key.output_stride * num_verts,
252 &out_offset, &out_buffer, &upload_flushed,
253 (void**)&out_map);
254
255 out_offset -= key.output_stride * min_index;
256
257 /* Translate. */
258 tr->run(tr, 0, num_verts, 0, out_map);
259
260 /* Unmap all buffers. */
261 for (i = 0; i < mgr->b.nr_vertex_buffers; i++) {
262 if (vb_translated[i]) {
263 pipe_buffer_unmap(mgr->pipe, vb_transfer[i]);
264 }
265 }
266
267 /* Setup the new vertex buffer in the first free slot. */
268 mgr->translate_vb_slot = ~0;
269 for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
270 if (!mgr->b.vertex_buffer[i].buffer) {
271 mgr->translate_vb_slot = i;
272
273 if (i >= mgr->b.nr_vertex_buffers) {
274 mgr->b.nr_real_vertex_buffers = i+1;
275 }
276 break;
277 }
278 }
279
280 if (mgr->translate_vb_slot != ~0) {
281 /* Setup the new vertex buffer. */
282 pipe_resource_reference(
283 &mgr->b.real_vertex_buffer[mgr->translate_vb_slot], out_buffer);
284 mgr->b.vertex_buffer[mgr->translate_vb_slot].buffer_offset = out_offset;
285 mgr->b.vertex_buffer[mgr->translate_vb_slot].stride = key.output_stride;
286
287 /* Setup new vertex elements. */
288 for (i = 0; i < mgr->ve->count; i++) {
289 if (tr_elem_index[i] < key.nr_elements) {
290 te = &key.element[tr_elem_index[i]];
291 new_velems[i].instance_divisor = mgr->ve->ve[i].instance_divisor;
292 new_velems[i].src_format = te->output_format;
293 new_velems[i].src_offset = te->output_offset;
294 new_velems[i].vertex_buffer_index = mgr->translate_vb_slot;
295 } else {
296 memcpy(&new_velems[i], &mgr->ve->ve[i],
297 sizeof(struct pipe_vertex_element));
298 }
299 }
300
301 mgr->fallback_ve =
302 mgr->pipe->create_vertex_elements_state(mgr->pipe, mgr->ve->count,
303 new_velems);
304
305 /* Preserve saved_ve. */
306 mgr->ve_binding_lock = TRUE;
307 mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->fallback_ve);
308 mgr->ve_binding_lock = FALSE;
309 }
310
311 pipe_resource_reference(&out_buffer, NULL);
312
313 return upload_flushed ? U_VBUF_UPLOAD_FLUSHED : 0;
314 }
315
316 static void u_vbuf_translate_end(struct u_vbuf_mgr_priv *mgr)
317 {
318 if (mgr->fallback_ve == NULL) {
319 return;
320 }
321
322 /* Restore vertex elements. */
323 /* Note that saved_ve will be overwritten in bind_vertex_elements_state. */
324 mgr->pipe->bind_vertex_elements_state(mgr->pipe, mgr->saved_ve);
325 mgr->pipe->delete_vertex_elements_state(mgr->pipe, mgr->fallback_ve);
326 mgr->fallback_ve = NULL;
327
328 /* Delete the now-unused VBO. */
329 pipe_resource_reference(&mgr->b.real_vertex_buffer[mgr->translate_vb_slot],
330 NULL);
331 mgr->b.nr_real_vertex_buffers = mgr->b.nr_vertex_buffers;
332 }
333
334 #define FORMAT_REPLACE(what, withwhat) \
335 case PIPE_FORMAT_##what: format = PIPE_FORMAT_##withwhat; break
336
337 struct u_vbuf_mgr_elements *
338 u_vbuf_mgr_create_vertex_elements(struct u_vbuf_mgr *mgrb,
339 unsigned count,
340 const struct pipe_vertex_element *attribs,
341 struct pipe_vertex_element *native_attribs)
342 {
343 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
344 unsigned i;
345 struct u_vbuf_mgr_elements *ve = CALLOC_STRUCT(u_vbuf_mgr_elements);
346
347 ve->count = count;
348
349 if (!count) {
350 return ve;
351 }
352
353 memcpy(ve->ve, attribs, sizeof(struct pipe_vertex_element) * count);
354 memcpy(native_attribs, attribs, sizeof(struct pipe_vertex_element) * count);
355
356 /* Set the best native format in case the original format is not
357 * supported. */
358 for (i = 0; i < count; i++) {
359 enum pipe_format format = ve->ve[i].src_format;
360
361 ve->src_format_size[i] = util_format_get_blocksize(format);
362
363 /* Choose a native format.
364 * For now we don't care about the alignment, that's going to
365 * be sorted out later. */
366 if (!mgr->caps.format_fixed32) {
367 switch (format) {
368 FORMAT_REPLACE(R32_FIXED, R32_FLOAT);
369 FORMAT_REPLACE(R32G32_FIXED, R32G32_FLOAT);
370 FORMAT_REPLACE(R32G32B32_FIXED, R32G32B32_FLOAT);
371 FORMAT_REPLACE(R32G32B32A32_FIXED, R32G32B32A32_FLOAT);
372 default:;
373 }
374 }
375 if (!mgr->caps.format_float16) {
376 switch (format) {
377 FORMAT_REPLACE(R16_FLOAT, R32_FLOAT);
378 FORMAT_REPLACE(R16G16_FLOAT, R32G32_FLOAT);
379 FORMAT_REPLACE(R16G16B16_FLOAT, R32G32B32_FLOAT);
380 FORMAT_REPLACE(R16G16B16A16_FLOAT, R32G32B32A32_FLOAT);
381 default:;
382 }
383 }
384 if (!mgr->caps.format_float64) {
385 switch (format) {
386 FORMAT_REPLACE(R64_FLOAT, R32_FLOAT);
387 FORMAT_REPLACE(R64G64_FLOAT, R32G32_FLOAT);
388 FORMAT_REPLACE(R64G64B64_FLOAT, R32G32B32_FLOAT);
389 FORMAT_REPLACE(R64G64B64A64_FLOAT, R32G32B32A32_FLOAT);
390 default:;
391 }
392 }
393 if (!mgr->caps.format_norm32) {
394 switch (format) {
395 FORMAT_REPLACE(R32_UNORM, R32_FLOAT);
396 FORMAT_REPLACE(R32G32_UNORM, R32G32_FLOAT);
397 FORMAT_REPLACE(R32G32B32_UNORM, R32G32B32_FLOAT);
398 FORMAT_REPLACE(R32G32B32A32_UNORM, R32G32B32A32_FLOAT);
399 FORMAT_REPLACE(R32_SNORM, R32_FLOAT);
400 FORMAT_REPLACE(R32G32_SNORM, R32G32_FLOAT);
401 FORMAT_REPLACE(R32G32B32_SNORM, R32G32B32_FLOAT);
402 FORMAT_REPLACE(R32G32B32A32_SNORM, R32G32B32A32_FLOAT);
403 default:;
404 }
405 }
406 if (!mgr->caps.format_scaled32) {
407 switch (format) {
408 FORMAT_REPLACE(R32_USCALED, R32_FLOAT);
409 FORMAT_REPLACE(R32G32_USCALED, R32G32_FLOAT);
410 FORMAT_REPLACE(R32G32B32_USCALED, R32G32B32_FLOAT);
411 FORMAT_REPLACE(R32G32B32A32_USCALED,R32G32B32A32_FLOAT);
412 FORMAT_REPLACE(R32_SSCALED, R32_FLOAT);
413 FORMAT_REPLACE(R32G32_SSCALED, R32G32_FLOAT);
414 FORMAT_REPLACE(R32G32B32_SSCALED, R32G32B32_FLOAT);
415 FORMAT_REPLACE(R32G32B32A32_SSCALED,R32G32B32A32_FLOAT);
416 default:;
417 }
418 }
419
420 native_attribs[i].src_format = format;
421 ve->native_format[i] = format;
422 ve->native_format_size[i] =
423 util_format_get_blocksize(ve->native_format[i]);
424
425 ve->incompatible_layout =
426 ve->incompatible_layout ||
427 ve->ve[i].src_format != ve->native_format[i] ||
428 (!mgr->caps.fetch_dword_unaligned && ve->ve[i].src_offset % 4 != 0);
429 }
430
431 /* Align the formats to the size of DWORD if needed. */
432 if (!mgr->caps.fetch_dword_unaligned) {
433 for (i = 0; i < count; i++) {
434 ve->native_format_size[i] = align(ve->native_format_size[i], 4);
435 }
436 }
437
438 return ve;
439 }
440
441 void u_vbuf_mgr_bind_vertex_elements(struct u_vbuf_mgr *mgrb,
442 void *cso,
443 struct u_vbuf_mgr_elements *ve)
444 {
445 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
446
447 if (!cso) {
448 return;
449 }
450
451 if (!mgr->ve_binding_lock) {
452 mgr->saved_ve = cso;
453 mgr->ve = ve;
454 }
455 }
456
457 void u_vbuf_mgr_destroy_vertex_elements(struct u_vbuf_mgr *mgr,
458 struct u_vbuf_mgr_elements *ve)
459 {
460 FREE(ve);
461 }
462
463 void u_vbuf_mgr_set_vertex_buffers(struct u_vbuf_mgr *mgrb,
464 unsigned count,
465 const struct pipe_vertex_buffer *bufs)
466 {
467 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
468 unsigned i;
469
470 mgr->any_user_vbs = FALSE;
471 mgr->incompatible_vb_layout = FALSE;
472
473 if (!mgr->caps.fetch_dword_unaligned) {
474 /* Check if the strides and offsets are aligned to the size of DWORD. */
475 for (i = 0; i < count; i++) {
476 if (bufs[i].buffer) {
477 if (bufs[i].stride % 4 != 0 ||
478 bufs[i].buffer_offset % 4 != 0) {
479 mgr->incompatible_vb_layout = TRUE;
480 break;
481 }
482 }
483 }
484 }
485
486 for (i = 0; i < count; i++) {
487 const struct pipe_vertex_buffer *vb = &bufs[i];
488
489 pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, vb->buffer);
490 pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
491
492 if (!vb->buffer) {
493 continue;
494 }
495
496 if (u_vbuf_resource(vb->buffer)->user_ptr) {
497 mgr->any_user_vbs = TRUE;
498 continue;
499 }
500
501 pipe_resource_reference(&mgr->b.real_vertex_buffer[i], vb->buffer);
502 }
503
504 for (; i < mgr->b.nr_real_vertex_buffers; i++) {
505 pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, NULL);
506 pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
507 }
508
509 memcpy(mgr->b.vertex_buffer, bufs,
510 sizeof(struct pipe_vertex_buffer) * count);
511
512 mgr->b.nr_vertex_buffers = count;
513 mgr->b.nr_real_vertex_buffers = count;
514 }
515
516 static enum u_vbuf_return_flags
517 u_vbuf_upload_buffers(struct u_vbuf_mgr_priv *mgr,
518 int min_index, int max_index,
519 unsigned instance_count)
520 {
521 unsigned i, nr = mgr->ve->count;
522 unsigned count = max_index + 1 - min_index;
523 boolean uploaded[PIPE_MAX_ATTRIBS] = {0};
524 enum u_vbuf_return_flags retval = 0;
525
526 for (i = 0; i < nr; i++) {
527 unsigned index = mgr->ve->ve[i].vertex_buffer_index;
528 struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[index];
529
530 if (vb->buffer &&
531 u_vbuf_resource(vb->buffer)->user_ptr &&
532 !uploaded[index]) {
533 unsigned first, size;
534 boolean flushed;
535 unsigned instance_div = mgr->ve->ve[i].instance_divisor;
536
537 if (instance_div) {
538 first = 0;
539 size = vb->stride *
540 ((instance_count + instance_div - 1) / instance_div);
541 } else if (vb->stride) {
542 first = vb->stride * min_index;
543 size = vb->stride * count;
544
545 /* Unusual case when stride is smaller than the format size.
546 * XXX This won't work with interleaved arrays. */
547 if (mgr->ve->native_format_size[i] > vb->stride)
548 size += mgr->ve->native_format_size[i] - vb->stride;
549 } else {
550 first = 0;
551 size = mgr->ve->native_format_size[i];
552 }
553
554 u_upload_data(mgr->b.uploader, first, size,
555 u_vbuf_resource(vb->buffer)->user_ptr + first,
556 &vb->buffer_offset,
557 &mgr->b.real_vertex_buffer[index],
558 &flushed);
559
560 vb->buffer_offset -= first;
561
562 uploaded[index] = TRUE;
563 if (flushed)
564 retval |= U_VBUF_UPLOAD_FLUSHED;
565 } else {
566 assert(mgr->b.real_vertex_buffer[index]);
567 }
568 }
569
570 return retval;
571 }
572
573 static void u_vbuf_mgr_compute_max_index(struct u_vbuf_mgr_priv *mgr)
574 {
575 unsigned i, nr = mgr->ve->count;
576
577 mgr->b.max_index = ~0;
578
579 for (i = 0; i < nr; i++) {
580 struct pipe_vertex_buffer *vb =
581 &mgr->b.vertex_buffer[mgr->ve->ve[i].vertex_buffer_index];
582 int unused;
583 unsigned max_index;
584
585 if (!vb->buffer ||
586 !vb->stride ||
587 u_vbuf_resource(vb->buffer)->user_ptr) {
588 continue;
589 }
590
591 /* How many bytes is unused after the last vertex.
592 * width0 may be "count*stride - unused" and we have to compensate
593 * for that when dividing by stride. */
594 unused = vb->stride -
595 (mgr->ve->ve[i].src_offset + mgr->ve->src_format_size[i]);
596
597 /* If src_offset is greater than stride (which means it's a buffer
598 * offset rather than a vertex offset)... */
599 if (unused < 0) {
600 unused = 0;
601 }
602
603 /* Compute the maximum index for this vertex element. */
604 max_index =
605 (vb->buffer->width0 - vb->buffer_offset + (unsigned)unused) /
606 vb->stride - 1;
607
608 mgr->b.max_index = MIN2(mgr->b.max_index, max_index);
609 }
610 }
611
612 enum u_vbuf_return_flags
613 u_vbuf_mgr_draw_begin(struct u_vbuf_mgr *mgrb,
614 const struct pipe_draw_info *info)
615 {
616 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
617 int min_index, max_index;
618 enum u_vbuf_return_flags retval = 0;
619
620 u_vbuf_mgr_compute_max_index(mgr);
621
622 min_index = info->min_index - info->index_bias;
623 if (info->max_index == ~0) {
624 max_index = mgr->b.max_index;
625 } else {
626 max_index = MIN2(info->max_index - info->index_bias, mgr->b.max_index);
627 }
628
629 /* Translate vertices with non-native layouts or formats. */
630 if (mgr->incompatible_vb_layout || mgr->ve->incompatible_layout) {
631 retval |= u_vbuf_translate_begin(mgr, min_index, max_index);
632
633 if (mgr->fallback_ve) {
634 retval |= U_VBUF_BUFFERS_UPDATED;
635 }
636 }
637
638 /* Upload user buffers. */
639 if (mgr->any_user_vbs) {
640 retval |= u_vbuf_upload_buffers(mgr, min_index, max_index,
641 info->instance_count);
642 retval |= U_VBUF_BUFFERS_UPDATED;
643 }
644 return retval;
645 }
646
647 void u_vbuf_mgr_draw_end(struct u_vbuf_mgr *mgrb)
648 {
649 struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
650
651 if (mgr->fallback_ve) {
652 u_vbuf_translate_end(mgr);
653 }
654 }