1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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 VMWARE 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.
26 **************************************************************************/
29 #include "util/u_memory.h"
30 #include "util/u_math.h"
31 #include "util/u_surface.h"
33 #include "lp_scene_queue.h"
39 #include "lp_rast_priv.h"
40 #include "lp_tile_soa.h"
41 #include "gallivm/lp_bld_debug.h"
46 * Begin rasterizing a scene.
47 * Called once per scene by one thread.
50 lp_rast_begin( struct lp_rasterizer *rast,
51 struct lp_scene *scene )
53 const struct pipe_framebuffer_state *fb = &scene->fb;
56 rast->curr_scene = scene;
58 LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
60 rast->state.nr_cbufs = scene->fb.nr_cbufs;
62 for (i = 0; i < rast->state.nr_cbufs; i++) {
63 struct pipe_surface *cbuf = scene->fb.cbufs[i];
64 llvmpipe_resource_map(cbuf->texture,
68 LP_TEX_USAGE_READ_WRITE,
73 struct pipe_surface *zsbuf = scene->fb.zsbuf;
74 rast->zsbuf.stride = llvmpipe_resource_stride(zsbuf->texture, zsbuf->level);
75 rast->zsbuf.blocksize =
76 util_format_get_blocksize(zsbuf->texture->format);
78 rast->zsbuf.map = llvmpipe_resource_map(zsbuf->texture,
82 LP_TEX_USAGE_READ_WRITE,
84 assert(rast->zsbuf.map);
87 lp_scene_bin_iter_begin( scene );
92 lp_rast_end( struct lp_rasterizer *rast )
94 struct lp_scene *scene = rast->curr_scene;
97 /* Unmap color buffers */
98 for (i = 0; i < rast->state.nr_cbufs; i++) {
99 struct pipe_surface *cbuf = scene->fb.cbufs[i];
100 llvmpipe_resource_unmap(cbuf->texture,
106 /* Unmap z/stencil buffer */
107 if (rast->zsbuf.map) {
108 struct pipe_surface *zsbuf = scene->fb.zsbuf;
109 llvmpipe_resource_unmap(zsbuf->texture,
113 rast->zsbuf.map = NULL;
116 lp_scene_reset( rast->curr_scene );
118 rast->curr_scene = NULL;
122 debug_printf("Post render scene: tile unswizzle: %u tile swizzle: %u\n",
123 lp_tile_unswizzle_count, lp_tile_swizzle_count);
129 * Begining rasterization of a tile.
130 * \param x window X position of the tile, in pixels
131 * \param y window Y position of the tile, in pixels
134 lp_rast_tile_begin(struct lp_rasterizer_task *task,
135 unsigned x, unsigned y)
137 struct lp_rasterizer *rast = task->rast;
138 struct lp_scene *scene = rast->curr_scene;
139 enum lp_texture_usage usage;
142 LP_DBG(DEBUG_RAST, "%s %d,%d\n", __FUNCTION__, x, y);
144 assert(x % TILE_SIZE == 0);
145 assert(y % TILE_SIZE == 0);
150 if (scene->has_color_clear)
151 usage = LP_TEX_USAGE_WRITE_ALL;
153 usage = LP_TEX_USAGE_READ_WRITE;
155 /* get pointers to color tile(s) */
156 for (buf = 0; buf < rast->state.nr_cbufs; buf++) {
157 struct pipe_surface *cbuf = rast->curr_scene->fb.cbufs[buf];
158 struct llvmpipe_resource *lpt;
160 lpt = llvmpipe_resource(cbuf->texture);
161 task->color_tiles[buf] = llvmpipe_get_texture_tile(lpt,
162 cbuf->face + cbuf->zslice,
166 assert(task->color_tiles[buf]);
169 /* get pointer to depth/stencil tile */
171 struct pipe_surface *zsbuf = rast->curr_scene->fb.zsbuf;
173 struct llvmpipe_resource *lpt = llvmpipe_resource(zsbuf->texture);
175 if (scene->has_depthstencil_clear)
176 usage = LP_TEX_USAGE_WRITE_ALL;
178 usage = LP_TEX_USAGE_READ_WRITE;
180 /* "prime" the tile: convert data from linear to tiled if necessary
181 * and update the tile's layout info.
183 (void) llvmpipe_get_texture_tile(lpt,
184 zsbuf->face + zsbuf->zslice,
188 /* Get actual pointer to the tile data. Note that depth/stencil
189 * data is tiled differently than color data.
191 task->depth_tile = lp_rast_get_depth_block_pointer(rast, x, y);
193 assert(task->depth_tile);
196 task->depth_tile = NULL;
203 * Clear the rasterizer's current color tile.
204 * This is a bin command called during bin processing.
207 lp_rast_clear_color(struct lp_rasterizer_task *task,
208 const union lp_rast_cmd_arg arg)
210 struct lp_rasterizer *rast = task->rast;
211 const uint8_t *clear_color = arg.clear_color;
215 LP_DBG(DEBUG_RAST, "%s 0x%x,0x%x,0x%x,0x%x\n", __FUNCTION__,
221 if (clear_color[0] == clear_color[1] &&
222 clear_color[1] == clear_color[2] &&
223 clear_color[2] == clear_color[3]) {
224 /* clear to grayscale value {x, x, x, x} */
225 for (i = 0; i < rast->state.nr_cbufs; i++) {
226 uint8_t *ptr = task->color_tiles[i];
227 memset(ptr, clear_color[0], TILE_SIZE * TILE_SIZE * 4);
232 * Note: if the swizzled tile layout changes (see TILE_PIXEL) this code
233 * will need to change. It'll be pretty obvious when clearing no longer
236 const unsigned chunk = TILE_SIZE / 4;
237 for (i = 0; i < rast->state.nr_cbufs; i++) {
238 uint8_t *c = task->color_tiles[i];
241 for (j = 0; j < 4 * TILE_SIZE; j++) {
242 memset(c, clear_color[0], chunk);
244 memset(c, clear_color[1], chunk);
246 memset(c, clear_color[2], chunk);
248 memset(c, clear_color[3], chunk);
254 LP_COUNT(nr_color_tile_clear);
259 * Clear the rasterizer's current z/stencil tile.
260 * This is a bin command called during bin processing.
263 lp_rast_clear_zstencil(struct lp_rasterizer_task *task,
264 const union lp_rast_cmd_arg arg)
266 struct lp_rasterizer *rast = task->rast;
267 const struct lp_rast_clearzs *clearzs = arg.clear_zstencil;
268 unsigned clear_value = clearzs->clearzs_value;
269 unsigned clear_mask = clearzs->clearzs_mask;
270 const unsigned height = TILE_SIZE / TILE_VECTOR_HEIGHT;
271 const unsigned width = TILE_SIZE * TILE_VECTOR_HEIGHT;
272 const unsigned block_size = rast->zsbuf.blocksize;
273 const unsigned dst_stride = rast->zsbuf.stride * TILE_VECTOR_HEIGHT;
277 LP_DBG(DEBUG_RAST, "%s 0x%x%x\n", __FUNCTION__, clear_value, clear_mask);
280 * Clear the aera of the swizzled depth/depth buffer matching this tile, in
281 * stripes of TILE_VECTOR_HEIGHT x TILE_SIZE at a time.
283 * The swizzled depth format is such that the depths for
284 * TILE_VECTOR_HEIGHT x TILE_VECTOR_WIDTH pixels have consecutive offsets.
287 dst = task->depth_tile;
289 assert(dst == lp_rast_get_depth_block_pointer(rast, task->x, task->y));
291 switch (block_size) {
293 memset(dst, (uint8_t) clear_value, height * width);
296 for (i = 0; i < height; i++) {
297 uint16_t *row = (uint16_t *)dst;
298 for (j = 0; j < width; j++)
299 *row++ = (uint16_t) clear_value;
304 if (clear_mask == 0xffffffff) {
305 for (i = 0; i < height; i++) {
306 uint32_t *row = (uint32_t *)dst;
307 for (j = 0; j < width; j++)
308 *row++ = clear_value;
313 for (i = 0; i < height; i++) {
314 uint32_t *row = (uint32_t *)dst;
315 for (j = 0; j < width; j++) {
316 uint32_t tmp = ~clear_mask & *row;
317 *row++ = (clear_value & clear_mask) | tmp;
331 * Load tile color from the framebuffer surface.
332 * This is a bin command called during bin processing.
336 lp_rast_load_color(struct lp_rasterizer_task *task,
337 const union lp_rast_cmd_arg arg)
339 struct lp_rasterizer *rast = task->rast;
341 enum lp_texture_usage usage;
343 LP_DBG(DEBUG_RAST, "%s at %u, %u\n", __FUNCTION__, x, y);
345 if (scene->has_color_clear)
346 usage = LP_TEX_USAGE_WRITE_ALL;
348 usage = LP_TEX_USAGE_READ_WRITE;
350 /* Get pointers to color tile(s).
351 * This will convert linear data to tiled if needed.
353 for (buf = 0; buf < rast->state.nr_cbufs; buf++) {
354 struct pipe_surface *cbuf = rast->curr_scene->fb.cbufs[buf];
355 struct llvmpipe_texture *lpt;
357 lpt = llvmpipe_texture(cbuf->texture);
358 task->color_tiles[buf] = llvmpipe_get_texture_tile(lpt,
359 cbuf->face + cbuf->zslice,
363 assert(task->color_tiles[buf]);
370 * Convert the color tile from tiled to linear layout.
371 * This is generally only done when we're flushing the scene just prior to
372 * SwapBuffers. If we didn't do this here, we'd have to convert the entire
373 * tiled color buffer to linear layout in the llvmpipe_texture_unmap()
374 * function. It's better to do it here to take advantage of
375 * threading/parallelism.
376 * This is a bin command which is stored in all bins.
379 lp_rast_store_color( struct lp_rasterizer_task *task,
380 const union lp_rast_cmd_arg arg)
382 struct lp_rasterizer *rast = task->rast;
383 struct lp_scene *scene = rast->curr_scene;
386 for (buf = 0; buf < rast->state.nr_cbufs; buf++) {
387 struct pipe_surface *cbuf = scene->fb.cbufs[buf];
388 const unsigned face = cbuf->face, level = cbuf->level;
389 struct llvmpipe_resource *lpt = llvmpipe_resource(cbuf->texture);
390 /* this will convert the tiled data to linear if needed */
391 (void) llvmpipe_get_texture_tile_linear(lpt, face, level,
399 * This is a bin command called during bin processing.
402 lp_rast_set_state(struct lp_rasterizer_task *task,
403 const union lp_rast_cmd_arg arg)
405 const struct lp_rast_state *state = arg.set_state;
407 LP_DBG(DEBUG_RAST, "%s %p\n", __FUNCTION__, (void *) state);
409 /* just set the current state pointer for this rasterizer */
410 task->current_state = state;
415 * Run the shader on all blocks in a tile. This is used when a tile is
416 * completely contained inside a triangle.
417 * This is a bin command called during bin processing.
420 lp_rast_shade_tile(struct lp_rasterizer_task *task,
421 const union lp_rast_cmd_arg arg)
423 struct lp_rasterizer *rast = task->rast;
424 const struct lp_rast_state *state = task->current_state;
425 const struct lp_rast_shader_inputs *inputs = arg.shade_tile;
426 struct lp_fragment_shader_variant *variant = state->variant;
427 const unsigned tile_x = task->x, tile_y = task->y;
430 LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
432 /* render the whole 64x64 tile in 4x4 chunks */
433 for (y = 0; y < TILE_SIZE; y += 4){
434 for (x = 0; x < TILE_SIZE; x += 4) {
435 uint8_t *color[PIPE_MAX_COLOR_BUFS];
440 for (i = 0; i < rast->state.nr_cbufs; i++)
441 color[i] = lp_rast_get_color_block_pointer(task, i,
442 tile_x + x, tile_y + y);
445 depth = lp_rast_get_depth_block_pointer(rast, tile_x + x, tile_y + y);
447 /* run shader on 4x4 block */
448 variant->jit_function[RAST_WHOLE]( &state->jit_context,
449 tile_x + x, tile_y + y,
456 INT_MIN, INT_MIN, INT_MIN,
457 NULL, NULL, NULL, &task->vis_counter);
464 * Compute shading for a 4x4 block of pixels.
465 * This is a bin command called during bin processing.
466 * \param x X position of quad in window coords
467 * \param y Y position of quad in window coords
469 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
470 const struct lp_rast_shader_inputs *inputs,
471 unsigned x, unsigned y,
472 int32_t c1, int32_t c2, int32_t c3)
474 const struct lp_rast_state *state = task->current_state;
475 struct lp_fragment_shader_variant *variant = state->variant;
476 struct lp_rasterizer *rast = task->rast;
477 uint8_t *color[PIPE_MAX_COLOR_BUFS];
484 assert(x % TILE_VECTOR_WIDTH == 0);
485 assert(y % TILE_VECTOR_HEIGHT == 0);
487 assert((x % 4) == 0);
488 assert((y % 4) == 0);
491 for (i = 0; i < rast->state.nr_cbufs; i++) {
492 color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
493 assert(lp_check_alignment(color[i], 16));
497 depth = lp_rast_get_depth_block_pointer(rast, x, y);
500 assert(lp_check_alignment(state->jit_context.blend_color, 16));
502 assert(lp_check_alignment(inputs->step[0], 16));
503 assert(lp_check_alignment(inputs->step[1], 16));
504 assert(lp_check_alignment(inputs->step[2], 16));
506 /* run shader on 4x4 block */
507 variant->jit_function[RAST_EDGE_TEST]( &state->jit_context,
524 * Set top row and left column of the tile's pixels to white. For debugging.
527 outline_tile(uint8_t *tile)
529 const uint8_t val = 0xff;
532 for (i = 0; i < TILE_SIZE; i++) {
533 TILE_PIXEL(tile, i, 0, 0) = val;
534 TILE_PIXEL(tile, i, 0, 1) = val;
535 TILE_PIXEL(tile, i, 0, 2) = val;
536 TILE_PIXEL(tile, i, 0, 3) = val;
538 TILE_PIXEL(tile, 0, i, 0) = val;
539 TILE_PIXEL(tile, 0, i, 1) = val;
540 TILE_PIXEL(tile, 0, i, 2) = val;
541 TILE_PIXEL(tile, 0, i, 3) = val;
547 * Draw grid of gray lines at 16-pixel intervals across the tile to
548 * show the sub-tile boundaries. For debugging.
551 outline_subtiles(uint8_t *tile)
553 const uint8_t val = 0x80;
554 const unsigned step = 16;
557 for (i = 0; i < TILE_SIZE; i += step) {
558 for (j = 0; j < TILE_SIZE; j++) {
559 TILE_PIXEL(tile, i, j, 0) = val;
560 TILE_PIXEL(tile, i, j, 1) = val;
561 TILE_PIXEL(tile, i, j, 2) = val;
562 TILE_PIXEL(tile, i, j, 3) = val;
564 TILE_PIXEL(tile, j, i, 0) = val;
565 TILE_PIXEL(tile, j, i, 1) = val;
566 TILE_PIXEL(tile, j, i, 2) = val;
567 TILE_PIXEL(tile, j, i, 3) = val;
577 * Called when we're done writing to a color tile.
580 lp_rast_tile_end(struct lp_rasterizer_task *task)
583 if (LP_DEBUG & (DEBUG_SHOW_SUBTILES | DEBUG_SHOW_TILES)) {
584 struct lp_rasterizer *rast = task->rast;
587 for (buf = 0; buf < rast->state.nr_cbufs; buf++) {
588 uint8_t *color = lp_rast_get_color_block_pointer(task, buf,
591 if (LP_DEBUG & DEBUG_SHOW_SUBTILES)
592 outline_subtiles(color);
593 else if (LP_DEBUG & DEBUG_SHOW_TILES)
598 (void) outline_subtiles;
602 memset(task->color_tiles, 0, sizeof(task->color_tiles));
603 task->depth_tile = NULL;
609 * Signal on a fence. This is called during bin execution/rasterization.
613 lp_rast_fence(struct lp_rasterizer_task *task,
614 const union lp_rast_cmd_arg arg)
616 struct lp_fence *fence = arg.fence;
617 lp_fence_signal(fence);
622 * Begin a new occlusion query.
623 * This is a bin command put in all bins.
627 lp_rast_begin_query(struct lp_rasterizer_task *task,
628 const union lp_rast_cmd_arg arg)
630 /* Reset the the per-task counter */
631 task->vis_counter = 0;
636 * End the current occlusion query.
637 * This is a bin command put in all bins.
641 lp_rast_end_query(struct lp_rasterizer_task *task,
642 const union lp_rast_cmd_arg arg)
644 struct llvmpipe_query *pq = arg.query_obj;
646 pipe_mutex_lock(pq->mutex);
648 /* Accumulate the visible fragment counter from this tile in
651 pq->count[task->thread_index] += task->vis_counter;
653 /* check if this is the last tile in the scene */
655 if (pq->tile_count == pq->num_tiles) {
658 /* sum the per-thread counters for the query */
660 for (i = 0; i < LP_MAX_THREADS; i++) {
661 pq->result += pq->count[i];
664 /* reset counters (in case this query is re-used in the scene) */
665 memset(pq->count, 0, sizeof(pq->count));
672 pipe_mutex_unlock(pq->mutex);
678 * Rasterize commands for a single bin.
679 * \param x, y position of the bin's tile in the framebuffer
680 * Must be called between lp_rast_begin() and lp_rast_end().
684 rasterize_bin(struct lp_rasterizer_task *task,
685 const struct cmd_bin *bin,
688 const struct cmd_block_list *commands = &bin->commands;
689 struct cmd_block *block;
692 lp_rast_tile_begin( task, x * TILE_SIZE, y * TILE_SIZE );
694 /* simply execute each of the commands in the block list */
695 for (block = commands->head; block; block = block->next) {
696 for (k = 0; k < block->count; k++) {
697 block->cmd[k]( task, block->arg[k] );
701 lp_rast_tile_end(task);
703 /* Free data for this bin.
705 lp_scene_bin_reset( task->rast->curr_scene, x, y);
709 #define RAST(x) { lp_rast_##x, #x }
717 RAST(clear_zstencil),
728 debug_bin( const struct cmd_bin *bin )
730 const struct cmd_block *head = bin->commands.head;
733 for (i = 0; i < head->count; i++) {
734 debug_printf("%d: ", i);
735 for (j = 0; j < Elements(cmd_names); j++) {
736 if (head->cmd[i] == cmd_names[j].cmd) {
737 debug_printf("%s\n", cmd_names[j].name);
741 if (j == Elements(cmd_names))
742 debug_printf("...other\n");
747 /* An empty bin is one that just loads the contents of the tile and
748 * stores them again unchanged. This typically happens when bins have
749 * been flushed for some reason in the middle of a frame, or when
750 * incremental updates are being made to a render target.
752 * Try to avoid doing pointless work in this case.
755 is_empty_bin( const struct cmd_bin *bin )
757 const struct cmd_block *head = bin->commands.head;
763 /* We emit at most two load-tile commands at the start of the first
764 * command block. In addition we seem to emit a couple of
765 * set-state commands even in empty bins.
767 * As a heuristic, if a bin has more than 4 commands, consider it
770 if (head->next != NULL ||
775 for (i = 0; i < head->count; i++)
776 if (head->cmd[i] != lp_rast_set_state) {
786 * Rasterize/execute all bins within a scene.
790 rasterize_scene(struct lp_rasterizer_task *task,
791 struct lp_scene *scene)
793 /* loop over scene bins, rasterize each */
797 for (i = 0; i < scene->tiles_x; i++) {
798 for (j = 0; j < scene->tiles_y; j++) {
799 struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
800 rasterize_bin(task, bin, i, j);
810 while ((bin = lp_scene_bin_iter_next(scene, &x, &y))) {
811 if (!is_empty_bin( bin ))
812 rasterize_bin(task, bin, x, y);
820 * Called by setup module when it has something for us to render.
823 lp_rast_queue_scene( struct lp_rasterizer *rast,
824 struct lp_scene *scene)
826 LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
828 if (rast->num_threads == 0) {
831 lp_rast_begin( rast, scene );
833 rasterize_scene( &rast->tasks[0], scene );
835 lp_scene_reset( scene );
839 rast->curr_scene = NULL;
842 /* threaded rendering! */
845 lp_scene_enqueue( rast->full_scenes, scene );
847 /* signal the threads that there's work to do */
848 for (i = 0; i < rast->num_threads; i++) {
849 pipe_semaphore_signal(&rast->tasks[i].work_ready);
853 LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
858 lp_rast_finish( struct lp_rasterizer *rast )
860 if (rast->num_threads == 0) {
866 /* wait for work to complete */
867 for (i = 0; i < rast->num_threads; i++) {
868 pipe_semaphore_wait(&rast->tasks[i].work_done);
875 * This is the thread's main entrypoint.
876 * It's a simple loop:
879 * 3. signal that we're done
881 static PIPE_THREAD_ROUTINE( thread_func, init_data )
883 struct lp_rasterizer_task *task = (struct lp_rasterizer_task *) init_data;
884 struct lp_rasterizer *rast = task->rast;
885 boolean debug = false;
890 debug_printf("thread %d waiting for work\n", task->thread_index);
891 pipe_semaphore_wait(&task->work_ready);
896 if (task->thread_index == 0) {
898 * - get next scene to rasterize
899 * - map the framebuffer surfaces
902 lp_scene_dequeue( rast->full_scenes, TRUE ) );
905 /* Wait for all threads to get here so that threads[1+] don't
906 * get a null rast->curr_scene pointer.
908 pipe_barrier_wait( &rast->barrier );
912 debug_printf("thread %d doing work\n", task->thread_index);
914 rasterize_scene(task,
917 /* wait for all threads to finish with this scene */
918 pipe_barrier_wait( &rast->barrier );
920 /* XXX: shouldn't be necessary:
922 if (task->thread_index == 0) {
926 /* signal done with work */
928 debug_printf("thread %d done working\n", task->thread_index);
930 pipe_semaphore_signal(&task->work_done);
938 * Initialize semaphores and spawn the threads.
941 create_rast_threads(struct lp_rasterizer *rast)
945 /* NOTE: if num_threads is zero, we won't use any threads */
946 for (i = 0; i < rast->num_threads; i++) {
947 pipe_semaphore_init(&rast->tasks[i].work_ready, 0);
948 pipe_semaphore_init(&rast->tasks[i].work_done, 0);
949 rast->threads[i] = pipe_thread_create(thread_func,
950 (void *) &rast->tasks[i]);
957 * Create new lp_rasterizer. If num_threads is zero, don't create any
958 * new threads, do rendering synchronously.
959 * \param num_threads number of rasterizer threads to create
961 struct lp_rasterizer *
962 lp_rast_create( unsigned num_threads )
964 struct lp_rasterizer *rast;
967 rast = CALLOC_STRUCT(lp_rasterizer);
971 rast->full_scenes = lp_scene_queue_create();
973 for (i = 0; i < Elements(rast->tasks); i++) {
974 struct lp_rasterizer_task *task = &rast->tasks[i];
976 task->thread_index = i;
979 rast->num_threads = num_threads;
981 create_rast_threads(rast);
983 /* for synchronizing rasterization threads */
984 pipe_barrier_init( &rast->barrier, rast->num_threads );
992 void lp_rast_destroy( struct lp_rasterizer *rast )
996 /* Set exit_flag and signal each thread's work_ready semaphore.
997 * Each thread will be woken up, notice that the exit_flag is set and
998 * break out of its main loop. The thread will then exit.
1000 rast->exit_flag = TRUE;
1001 for (i = 0; i < rast->num_threads; i++) {
1002 pipe_semaphore_signal(&rast->tasks[i].work_ready);
1005 /* Wait for threads to terminate before cleaning up per-thread data */
1006 for (i = 0; i < rast->num_threads; i++) {
1007 pipe_thread_wait(rast->threads[i]);
1010 /* Clean up per-thread data */
1011 for (i = 0; i < rast->num_threads; i++) {
1012 pipe_semaphore_destroy(&rast->tasks[i].work_ready);
1013 pipe_semaphore_destroy(&rast->tasks[i].work_done);
1016 /* for synchronizing rasterization threads */
1017 pipe_barrier_destroy( &rast->barrier );
1019 lp_scene_queue_destroy(rast->full_scenes);
1025 /** Return number of rasterization threads */
1027 lp_rast_get_num_threads( struct lp_rasterizer *rast )
1029 return rast->num_threads;