diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_rast.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast.c | 1023 |
1 files changed, 1023 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast.c b/src/gallium/drivers/llvmpipe/lp_rast.c new file mode 100644 index 00000000000..54af850467a --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_rast.c @@ -0,0 +1,1023 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#include <limits.h> +#include "util/u_memory.h" +#include "util/u_math.h" +#include "util/u_cpu_detect.h" +#include "util/u_surface.h" + +#include "lp_scene_queue.h" +#include "lp_debug.h" +#include "lp_fence.h" +#include "lp_rast.h" +#include "lp_rast_priv.h" +#include "lp_tile_soa.h" +#include "lp_bld_debug.h" +#include "lp_scene.h" + + +/** + * Begin the rasterization phase. + * Map the framebuffer surfaces. Initialize the 'rast' state. + */ +static boolean +lp_rast_begin( struct lp_rasterizer *rast, + const struct pipe_framebuffer_state *fb, + boolean write_color, + boolean write_zstencil ) +{ + struct pipe_screen *screen = rast->screen; + struct pipe_surface *cbuf, *zsbuf; + int i; + + LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__); + + util_copy_framebuffer_state(&rast->state.fb, fb); + + rast->state.write_zstencil = write_zstencil; + rast->state.write_color = write_color; + + rast->check_for_clipped_tiles = (fb->width % TILE_SIZE != 0 || + fb->height % TILE_SIZE != 0); + + + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + cbuf = rast->state.fb.cbufs[i]; + if (cbuf) { + rast->cbuf_transfer[i] = screen->get_tex_transfer(rast->screen, + cbuf->texture, + cbuf->face, + cbuf->level, + cbuf->zslice, + PIPE_TRANSFER_READ_WRITE, + 0, 0, + cbuf->width, + cbuf->height); + if (!rast->cbuf_transfer[i]) + goto fail; + + rast->cbuf_map[i] = screen->transfer_map(rast->screen, + rast->cbuf_transfer[i]); + if (!rast->cbuf_map[i]) + goto fail; + } + } + + zsbuf = rast->state.fb.zsbuf; + if (zsbuf) { + rast->zsbuf_transfer = screen->get_tex_transfer(rast->screen, + zsbuf->texture, + zsbuf->face, + zsbuf->level, + zsbuf->zslice, + PIPE_TRANSFER_READ_WRITE, + 0, 0, + zsbuf->width, + zsbuf->height); + if (!rast->zsbuf_transfer) + goto fail; + + rast->zsbuf_map = screen->transfer_map(rast->screen, + rast->zsbuf_transfer); + if (!rast->zsbuf_map) + goto fail; + } + + return TRUE; + +fail: + /* Unmap and release transfers? + */ + return FALSE; +} + + +/** + * Finish the rasterization phase. + * Unmap framebuffer surfaces. + */ +static void +lp_rast_end( struct lp_rasterizer *rast ) +{ + struct pipe_screen *screen = rast->screen; + unsigned i; + + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + if (rast->cbuf_map[i]) + screen->transfer_unmap(screen, rast->cbuf_transfer[i]); + + if (rast->cbuf_transfer[i]) + screen->tex_transfer_destroy(rast->cbuf_transfer[i]); + + rast->cbuf_transfer[i] = NULL; + rast->cbuf_map[i] = NULL; + } + + if (rast->zsbuf_map) + screen->transfer_unmap(screen, rast->zsbuf_transfer); + + if (rast->zsbuf_transfer) + screen->tex_transfer_destroy(rast->zsbuf_transfer); + + rast->zsbuf_transfer = NULL; + rast->zsbuf_map = NULL; +} + + +/** + * Begining rasterization of a tile. + * \param x window X position of the tile, in pixels + * \param y window Y position of the tile, in pixels + */ +static void +lp_rast_start_tile( struct lp_rasterizer *rast, + unsigned thread_index, + unsigned x, unsigned y ) +{ + LP_DBG(DEBUG_RAST, "%s %d,%d\n", __FUNCTION__, x, y); + + rast->tasks[thread_index].x = x; + rast->tasks[thread_index].y = y; +} + + +/** + * Clear the rasterizer's current color tile. + * This is a bin command called during bin processing. + */ +void lp_rast_clear_color( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg ) +{ + const uint8_t *clear_color = arg.clear_color; + uint8_t **color_tile = rast->tasks[thread_index].tile.color; + unsigned i; + + LP_DBG(DEBUG_RAST, "%s 0x%x,0x%x,0x%x,0x%x\n", __FUNCTION__, + clear_color[0], + clear_color[1], + clear_color[2], + clear_color[3]); + + if (clear_color[0] == clear_color[1] && + clear_color[1] == clear_color[2] && + clear_color[2] == clear_color[3]) { + /* clear to grayscale value {x, x, x, x} */ + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + memset(color_tile[i], clear_color[0], TILE_SIZE * TILE_SIZE * 4); + } + } + else { + /* Non-gray color. + * Note: if the swizzled tile layout changes (see TILE_PIXEL) this code + * will need to change. It'll be pretty obvious when clearing no longer + * works. + */ + const unsigned chunk = TILE_SIZE / 4; + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + uint8_t *c = color_tile[i]; + unsigned j; + for (j = 0; j < 4 * TILE_SIZE; j++) { + memset(c, clear_color[0], chunk); + c += chunk; + memset(c, clear_color[1], chunk); + c += chunk; + memset(c, clear_color[2], chunk); + c += chunk; + memset(c, clear_color[3], chunk); + c += chunk; + } + assert(c - color_tile[i] == TILE_SIZE * TILE_SIZE * 4); + } + } +} + + +/** + * Clear the rasterizer's current z/stencil tile. + * This is a bin command called during bin processing. + */ +void lp_rast_clear_zstencil( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg) +{ + unsigned i; + uint32_t *depth_tile = rast->tasks[thread_index].tile.depth; + + LP_DBG(DEBUG_RAST, "%s 0x%x\n", __FUNCTION__, arg.clear_zstencil); + + for (i = 0; i < TILE_SIZE * TILE_SIZE; i++) + depth_tile[i] = arg.clear_zstencil; +} + + +/** + * Load tile color from the framebuffer surface. + * This is a bin command called during bin processing. + */ +void lp_rast_load_color( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const unsigned x = task->x; + const unsigned y = task->y; + unsigned i; + + LP_DBG(DEBUG_RAST, "%s at %u, %u\n", __FUNCTION__, x, y); + + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + struct pipe_transfer *transfer = rast->cbuf_transfer[i]; + int w = TILE_SIZE; + int h = TILE_SIZE; + + if (x >= transfer->width) + continue; + + if (y >= transfer->height) + continue; + + assert(w >= 0); + assert(h >= 0); + assert(w <= TILE_SIZE); + assert(h <= TILE_SIZE); + + lp_tile_read_4ub(transfer->texture->format, + task->tile.color[i], + rast->cbuf_map[i], + transfer->stride, + x, y, + w, h); + } +} + + +static void +lp_tile_read_z32(uint32_t *tile, + const uint8_t *map, + unsigned map_stride, + unsigned x0, unsigned y0, unsigned w, unsigned h) +{ + unsigned x, y; + const uint8_t *map_row = map + y0*map_stride; + for (y = 0; y < h; ++y) { + const uint32_t *map_pixel = (uint32_t *)(map_row + x0*4); + for (x = 0; x < w; ++x) { + *tile++ = *map_pixel++; + } + map_row += map_stride; + } +} + +/** + * Load tile z/stencil from the framebuffer surface. + * This is a bin command called during bin processing. + */ +void lp_rast_load_zstencil( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg ) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const unsigned x = task->x; + const unsigned y = task->y; + unsigned w = TILE_SIZE; + unsigned h = TILE_SIZE; + + if (x + w > rast->state.fb.width) + w -= x + w - rast->state.fb.width; + + if (y + h > rast->state.fb.height) + h -= y + h - rast->state.fb.height; + + LP_DBG(DEBUG_RAST, "%s %d,%d %dx%d\n", __FUNCTION__, x, y, w, h); + + assert(rast->zsbuf_transfer->texture->format == PIPE_FORMAT_Z32_UNORM); + lp_tile_read_z32(task->tile.depth, + rast->zsbuf_map, + rast->zsbuf_transfer->stride, + x, y, w, h); +} + + +void lp_rast_set_state( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg ) +{ + const struct lp_rast_state *state = arg.set_state; + + LP_DBG(DEBUG_RAST, "%s %p\n", __FUNCTION__, (void *) state); + + /* just set the current state pointer for this rasterizer */ + rast->tasks[thread_index].current_state = state; +} + + + +/** + * Run the shader on all blocks in a tile. This is used when a tile is + * completely contained inside a triangle. + * This is a bin command called during bin processing. + */ +void lp_rast_shade_tile( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg ) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const struct lp_rast_state *state = task->current_state; + struct lp_rast_tile *tile = &task->tile; + const struct lp_rast_shader_inputs *inputs = arg.shade_tile; + const unsigned tile_x = task->x; + const unsigned tile_y = task->y; + unsigned x, y; + + LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__); + + /* render the whole 64x64 tile in 4x4 chunks */ + for (y = 0; y < TILE_SIZE; y += 4){ + for (x = 0; x < TILE_SIZE; x += 4) { + uint8_t *color[PIPE_MAX_COLOR_BUFS]; + uint32_t *depth; + unsigned block_offset, i; + + /* offset of the 16x16 pixel block within the tile */ + block_offset = ((y / 4) * (16 * 16) + (x / 4) * 16); + + /* color buffer */ + for (i = 0; i < rast->state.fb.nr_cbufs; i++) + color[i] = tile->color[i] + 4 * block_offset; + + /* depth buffer */ + depth = tile->depth + block_offset; + + /* run shader */ + state->jit_function[0]( &state->jit_context, + tile_x + x, tile_y + y, + inputs->a0, + inputs->dadx, + inputs->dady, + color, + depth, + INT_MIN, INT_MIN, INT_MIN, + NULL, NULL, NULL ); + } + } +} + + +/** + * Compute shading for a 4x4 block of pixels. + * This is a bin command called during bin processing. + */ +void lp_rast_shade_quads( struct lp_rasterizer *rast, + unsigned thread_index, + const struct lp_rast_shader_inputs *inputs, + unsigned x, unsigned y, + int32_t c1, int32_t c2, int32_t c3) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const struct lp_rast_state *state = task->current_state; + struct lp_rast_tile *tile = &task->tile; + uint8_t *color[PIPE_MAX_COLOR_BUFS]; + void *depth; + unsigned i; + unsigned ix, iy; + int block_offset; + +#ifdef DEBUG + assert(state); + + /* Sanity checks */ + assert(x % TILE_VECTOR_WIDTH == 0); + assert(y % TILE_VECTOR_HEIGHT == 0); + + assert((x % 4) == 0); + assert((y % 4) == 0); +#endif + + ix = x % TILE_SIZE; + iy = y % TILE_SIZE; + + /* offset of the 16x16 pixel block within the tile */ + block_offset = ((iy / 4) * (16 * 16) + (ix / 4) * 16); + + /* color buffer */ + for (i = 0; i < rast->state.fb.nr_cbufs; i++) + color[i] = tile->color[i] + 4 * block_offset; + + /* depth buffer */ + depth = tile->depth + block_offset; + + + +#ifdef DEBUG + assert(lp_check_alignment(tile->depth, 16)); + assert(lp_check_alignment(tile->color[0], 16)); + assert(lp_check_alignment(state->jit_context.blend_color, 16)); + + assert(lp_check_alignment(inputs->step[0], 16)); + assert(lp_check_alignment(inputs->step[1], 16)); + assert(lp_check_alignment(inputs->step[2], 16)); +#endif + + /* run shader */ + state->jit_function[1]( &state->jit_context, + x, y, + inputs->a0, + inputs->dadx, + inputs->dady, + color, + depth, + c1, c2, c3, + inputs->step[0], inputs->step[1], inputs->step[2]); +} + + +/** + * Set top row and left column of the tile's pixels to white. For debugging. + */ +static void +outline_tile(uint8_t *tile) +{ + const uint8_t val = 0xff; + unsigned i; + + for (i = 0; i < TILE_SIZE; i++) { + TILE_PIXEL(tile, i, 0, 0) = val; + TILE_PIXEL(tile, i, 0, 1) = val; + TILE_PIXEL(tile, i, 0, 2) = val; + TILE_PIXEL(tile, i, 0, 3) = val; + + TILE_PIXEL(tile, 0, i, 0) = val; + TILE_PIXEL(tile, 0, i, 1) = val; + TILE_PIXEL(tile, 0, i, 2) = val; + TILE_PIXEL(tile, 0, i, 3) = val; + } +} + + +/** + * Draw grid of gray lines at 16-pixel intervals across the tile to + * show the sub-tile boundaries. For debugging. + */ +static void +outline_subtiles(uint8_t *tile) +{ + const uint8_t val = 0x80; + const unsigned step = 16; + unsigned i, j; + + for (i = 0; i < TILE_SIZE; i += step) { + for (j = 0; j < TILE_SIZE; j++) { + TILE_PIXEL(tile, i, j, 0) = val; + TILE_PIXEL(tile, i, j, 1) = val; + TILE_PIXEL(tile, i, j, 2) = val; + TILE_PIXEL(tile, i, j, 3) = val; + + TILE_PIXEL(tile, j, i, 0) = val; + TILE_PIXEL(tile, j, i, 1) = val; + TILE_PIXEL(tile, j, i, 2) = val; + TILE_PIXEL(tile, j, i, 3) = val; + } + } + + outline_tile(tile); +} + + + +/** + * Write the rasterizer's color tile to the framebuffer. + */ +static void lp_rast_store_color( struct lp_rasterizer *rast, + unsigned thread_index) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const unsigned x = task->x; + const unsigned y = task->y; + unsigned i; + + for (i = 0; i < rast->state.fb.nr_cbufs; i++) { + struct pipe_transfer *transfer = rast->cbuf_transfer[i]; + int w = TILE_SIZE; + int h = TILE_SIZE; + + if (x >= transfer->width) + continue; + + if (y >= transfer->height) + continue; + + LP_DBG(DEBUG_RAST, "%s [%u] %d,%d %dx%d\n", __FUNCTION__, + thread_index, x, y, w, h); + + if (LP_DEBUG & DEBUG_SHOW_SUBTILES) + outline_subtiles(task->tile.color[i]); + else if (LP_DEBUG & DEBUG_SHOW_TILES) + outline_tile(task->tile.color[i]); + + lp_tile_write_4ub(transfer->texture->format, + task->tile.color[i], + rast->cbuf_map[i], + transfer->stride, + x, y, + w, h); + } +} + + +static void +lp_tile_write_z32(const uint32_t *src, uint8_t *dst, unsigned dst_stride, + unsigned x0, unsigned y0, unsigned w, unsigned h) +{ + unsigned x, y; + uint8_t *dst_row = dst + y0*dst_stride; + for (y = 0; y < h; ++y) { + uint32_t *dst_pixel = (uint32_t *)(dst_row + x0*4); + for (x = 0; x < w; ++x) { + *dst_pixel++ = *src++; + } + dst_row += dst_stride; + } +} + +/** + * Write the rasterizer's z/stencil tile to the framebuffer. + */ +static void lp_rast_store_zstencil( struct lp_rasterizer *rast, + unsigned thread_index ) +{ + struct lp_rasterizer_task *task = &rast->tasks[thread_index]; + const unsigned x = task->x; + const unsigned y = task->y; + unsigned w = TILE_SIZE; + unsigned h = TILE_SIZE; + + if (x + w > rast->state.fb.width) + w -= x + w - rast->state.fb.width; + + if (y + h > rast->state.fb.height) + h -= y + h - rast->state.fb.height; + + LP_DBG(DEBUG_RAST, "%s %d,%d %dx%d\n", __FUNCTION__, x, y, w, h); + + assert(rast->zsbuf_transfer->texture->format == PIPE_FORMAT_Z32_UNORM); + lp_tile_write_z32(task->tile.depth, + rast->zsbuf_map, + rast->zsbuf_transfer->stride, + x, y, w, h); +} + + +/** + * Write the rasterizer's tiles to the framebuffer. + */ +static void +lp_rast_end_tile( struct lp_rasterizer *rast, + unsigned thread_index ) +{ + LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__); + + if (rast->state.write_color) + lp_rast_store_color(rast, thread_index); + + if (rast->state.write_zstencil) + lp_rast_store_zstencil(rast, thread_index); +} + + +/** + * Signal on a fence. This is called during bin execution/rasterization. + * Called per thread. + */ +void lp_rast_fence( struct lp_rasterizer *rast, + unsigned thread_index, + const union lp_rast_cmd_arg arg ) +{ + struct lp_fence *fence = arg.fence; + + pipe_mutex_lock( fence->mutex ); + + fence->count++; + assert(fence->count <= fence->rank); + + LP_DBG(DEBUG_RAST, "%s count=%u rank=%u\n", __FUNCTION__, + fence->count, fence->rank); + + pipe_condvar_signal( fence->signalled ); + + pipe_mutex_unlock( fence->mutex ); +} + + +/** + * When all the threads are done rasterizing a scene, one thread will + * call this function to reset the scene and put it onto the empty queue. + */ +static void +release_scene( struct lp_rasterizer *rast, + struct lp_scene *scene ) +{ + util_unreference_framebuffer_state( &scene->fb ); + + lp_scene_reset( scene ); + lp_scene_enqueue( rast->empty_scenes, scene ); + rast->curr_scene = NULL; +} + + +/** + * Rasterize commands for a single bin. + * \param x, y position of the bin's tile in the framebuffer + * Must be called between lp_rast_begin() and lp_rast_end(). + * Called per thread. + */ +static void +rasterize_bin( struct lp_rasterizer *rast, + unsigned thread_index, + const struct cmd_bin *bin, + int x, int y) +{ + const struct cmd_block_list *commands = &bin->commands; + struct cmd_block *block; + unsigned k; + + lp_rast_start_tile( rast, thread_index, x, y ); + + /* simply execute each of the commands in the block list */ + for (block = commands->head; block; block = block->next) { + for (k = 0; k < block->count; k++) { + block->cmd[k]( rast, thread_index, block->arg[k] ); + } + } + + lp_rast_end_tile( rast, thread_index ); +} + + +#define RAST(x) { lp_rast_##x, #x } + +static struct { + lp_rast_cmd cmd; + const char *name; +} cmd_names[] = +{ + RAST(load_color), + RAST(load_zstencil), + RAST(clear_color), + RAST(clear_zstencil), + RAST(triangle), + RAST(shade_tile), + RAST(set_state), + RAST(fence), +}; + +static void +debug_bin( const struct cmd_bin *bin ) +{ + const struct cmd_block *head = bin->commands.head; + int i, j; + + for (i = 0; i < head->count; i++) { + debug_printf("%d: ", i); + for (j = 0; j < Elements(cmd_names); j++) { + if (head->cmd[i] == cmd_names[j].cmd) { + debug_printf("%s\n", cmd_names[j].name); + break; + } + } + if (j == Elements(cmd_names)) + debug_printf("...other\n"); + } + +} + +/* An empty bin is one that just loads the contents of the tile and + * stores them again unchanged. This typically happens when bins have + * been flushed for some reason in the middle of a frame, or when + * incremental updates are being made to a render target. + * + * Try to avoid doing pointless work in this case. + */ +static boolean +is_empty_bin( const struct cmd_bin *bin ) +{ + const struct cmd_block *head = bin->commands.head; + int i; + + if (0) + debug_bin(bin); + + /* We emit at most two load-tile commands at the start of the first + * command block. In addition we seem to emit a couple of + * set-state commands even in empty bins. + * + * As a heuristic, if a bin has more than 4 commands, consider it + * non-empty. + */ + if (head->next != NULL || + head->count > 4) { + return FALSE; + } + + for (i = 0; i < head->count; i++) + if (head->cmd[i] != lp_rast_load_color && + head->cmd[i] != lp_rast_load_zstencil && + head->cmd[i] != lp_rast_set_state) { + return FALSE; + } + + return TRUE; +} + + + +/** + * Rasterize/execute all bins within a scene. + * Called per thread. + */ +static void +rasterize_scene( struct lp_rasterizer *rast, + unsigned thread_index, + struct lp_scene *scene, + bool write_depth ) +{ + /* loop over scene bins, rasterize each */ +#if 0 + { + unsigned i, j; + for (i = 0; i < scene->tiles_x; i++) { + for (j = 0; j < scene->tiles_y; j++) { + struct cmd_bin *bin = lp_get_bin(scene, i, j); + rasterize_bin( rast, thread_index, + bin, i * TILE_SIZE, j * TILE_SIZE ); + } + } + } +#else + { + struct cmd_bin *bin; + int x, y; + + assert(scene); + while ((bin = lp_scene_bin_iter_next(scene, &x, &y))) { + if (!is_empty_bin( bin )) + rasterize_bin( rast, thread_index, bin, x * TILE_SIZE, y * TILE_SIZE); + } + } +#endif +} + + +/** + * Called by setup module when it has something for us to render. + */ +void +lp_rasterize_scene( struct lp_rasterizer *rast, + struct lp_scene *scene, + const struct pipe_framebuffer_state *fb, + bool write_depth ) +{ + boolean debug = false; + + LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__); + + if (debug) { + unsigned x, y; + debug_printf("rasterize scene:\n"); + debug_printf(" data size: %u\n", lp_scene_data_size(scene)); + for (y = 0; y < scene->tiles_y; y++) { + for (x = 0; x < scene->tiles_x; x++) { + debug_printf(" bin %u, %u size: %u\n", x, y, + lp_scene_bin_size(scene, x, y)); + } + } + } + + /* save framebuffer state in the bin */ + util_copy_framebuffer_state(&scene->fb, fb); + scene->write_depth = write_depth; + + if (rast->num_threads == 0) { + /* no threading */ + + lp_rast_begin( rast, fb, + fb->nr_cbufs != 0, /* always write color if cbufs present */ + fb->zsbuf != NULL && write_depth ); + + lp_scene_bin_iter_begin( scene ); + rasterize_scene( rast, 0, scene, write_depth ); + + release_scene( rast, scene ); + + lp_rast_end( rast ); + } + else { + /* threaded rendering! */ + unsigned i; + + lp_scene_enqueue( rast->full_scenes, scene ); + + /* signal the threads that there's work to do */ + for (i = 0; i < rast->num_threads; i++) { + pipe_semaphore_signal(&rast->tasks[i].work_ready); + } + + /* wait for work to complete */ + for (i = 0; i < rast->num_threads; i++) { + pipe_semaphore_wait(&rast->tasks[i].work_done); + } + } + + LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__); +} + + +/** + * This is the thread's main entrypoint. + * It's a simple loop: + * 1. wait for work + * 2. do work + * 3. signal that we're done + */ +static PIPE_THREAD_ROUTINE( thread_func, init_data ) +{ + struct lp_rasterizer_task *task = (struct lp_rasterizer_task *) init_data; + struct lp_rasterizer *rast = task->rast; + boolean debug = false; + + while (1) { + /* wait for work */ + if (debug) + debug_printf("thread %d waiting for work\n", task->thread_index); + pipe_semaphore_wait(&task->work_ready); + + if (task->thread_index == 0) { + /* thread[0]: + * - get next scene to rasterize + * - map the framebuffer surfaces + */ + const struct pipe_framebuffer_state *fb; + boolean write_depth; + + rast->curr_scene = lp_scene_dequeue( rast->full_scenes, TRUE ); + + lp_scene_bin_iter_begin( rast->curr_scene ); + + fb = &rast->curr_scene->fb; + write_depth = rast->curr_scene->write_depth; + + lp_rast_begin( rast, fb, + fb->nr_cbufs != 0, + fb->zsbuf != NULL && write_depth ); + } + + /* Wait for all threads to get here so that threads[1+] don't + * get a null rast->curr_scene pointer. + */ + pipe_barrier_wait( &rast->barrier ); + + /* do work */ + if (debug) + debug_printf("thread %d doing work\n", task->thread_index); + rasterize_scene(rast, + task->thread_index, + rast->curr_scene, + rast->curr_scene->write_depth); + + /* wait for all threads to finish with this scene */ + pipe_barrier_wait( &rast->barrier ); + + if (task->thread_index == 0) { + /* thread[0]: + * - release the scene object + * - unmap the framebuffer surfaces + */ + release_scene( rast, rast->curr_scene ); + lp_rast_end( rast ); + } + + /* signal done with work */ + if (debug) + debug_printf("thread %d done working\n", task->thread_index); + pipe_semaphore_signal(&task->work_done); + } + + return NULL; +} + + +/** + * Initialize semaphores and spawn the threads. + */ +static void +create_rast_threads(struct lp_rasterizer *rast) +{ + unsigned i; + + rast->num_threads = util_cpu_caps.nr_cpus; + rast->num_threads = debug_get_num_option("LP_NUM_THREADS", rast->num_threads); + rast->num_threads = MIN2(rast->num_threads, MAX_THREADS); + + /* NOTE: if num_threads is zero, we won't use any threads */ + for (i = 0; i < rast->num_threads; i++) { + pipe_semaphore_init(&rast->tasks[i].work_ready, 0); + pipe_semaphore_init(&rast->tasks[i].work_done, 0); + rast->threads[i] = pipe_thread_create(thread_func, + (void *) &rast->tasks[i]); + } +} + + + +/** + * Create new lp_rasterizer. + * \param empty the queue to put empty scenes on after we've finished + * processing them. + */ +struct lp_rasterizer * +lp_rast_create( struct pipe_screen *screen, struct lp_scene_queue *empty ) +{ + struct lp_rasterizer *rast; + unsigned i, cbuf; + + rast = CALLOC_STRUCT(lp_rasterizer); + if(!rast) + return NULL; + + rast->screen = screen; + + rast->empty_scenes = empty; + rast->full_scenes = lp_scene_queue_create(); + + for (i = 0; i < Elements(rast->tasks); i++) { + struct lp_rasterizer_task *task = &rast->tasks[i]; + + for (cbuf = 0; cbuf < PIPE_MAX_COLOR_BUFS; cbuf++ ) + task->tile.color[cbuf] = align_malloc(TILE_SIZE * TILE_SIZE * 4, 16); + + task->tile.depth = align_malloc(TILE_SIZE * TILE_SIZE * 4, 16); + task->rast = rast; + task->thread_index = i; + } + + create_rast_threads(rast); + + /* for synchronizing rasterization threads */ + pipe_barrier_init( &rast->barrier, rast->num_threads ); + + return rast; +} + + +/* Shutdown: + */ +void lp_rast_destroy( struct lp_rasterizer *rast ) +{ + unsigned i, cbuf; + + util_unreference_framebuffer_state(&rast->state.fb); + + for (i = 0; i < Elements(rast->tasks); i++) { + align_free(rast->tasks[i].tile.depth); + for (cbuf = 0; cbuf < PIPE_MAX_COLOR_BUFS; cbuf++ ) + align_free(rast->tasks[i].tile.color[cbuf]); + } + + /* for synchronizing rasterization threads */ + pipe_barrier_destroy( &rast->barrier ); + + FREE(rast); +} + + +/** Return number of rasterization threads */ +unsigned +lp_rast_get_num_threads( struct lp_rasterizer *rast ) +{ + return rast->num_threads; +} |