Merge branch 'gallium_draw_llvm'
[mesa.git] / src / gallium / drivers / llvmpipe / lp_rast.c
index cee20d8c68725c518ac90490187fb0586cb91572..e629a3e5f1f6a07ea4e21632cfbbcb3352283238 100644 (file)
 #include "lp_scene_queue.h"
 #include "lp_debug.h"
 #include "lp_fence.h"
+#include "lp_perf.h"
 #include "lp_rast.h"
 #include "lp_rast_priv.h"
 #include "lp_tile_soa.h"
-#include "lp_bld_debug.h"
+#include "gallivm/lp_bld_debug.h"
 #include "lp_scene.h"
 
 
-/**
- * Begin the rasterization phase.
- * Map the framebuffer surfaces.  Initialize the 'rast' state.
+/* Begin rasterizing a scene:
  */
 static boolean
 lp_rast_begin( struct lp_rasterizer *rast,
-               const struct pipe_framebuffer_state *fb,
-               boolean write_color,
-               boolean write_zstencil )
+               struct lp_scene *scene )
 {
-   struct pipe_screen *screen = rast->screen;
-   struct pipe_surface *cbuf, *zsbuf;
+   const struct pipe_framebuffer_state *fb = &scene->fb;
+   boolean write_color = fb->nr_cbufs != 0;
+   boolean write_zstencil = fb->zsbuf != NULL;
    int i;
 
-   LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
+   rast->curr_scene = scene;
 
-   util_copy_framebuffer_state(&rast->state.fb, fb);
+   LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
 
+   rast->state.nr_cbufs = scene->fb.nr_cbufs;
    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;
-      }
+   for (i = 0; i < rast->state.nr_cbufs; i++) {
+      struct pipe_surface *cbuf = scene->fb.cbufs[i];
+      rast->cbuf[i].map = scene->cbuf_map[i];
+      rast->cbuf[i].format = cbuf->texture->format;
+      rast->cbuf[i].width = cbuf->width;
+      rast->cbuf[i].height = cbuf->height;
+      rast->cbuf[i].stride = llvmpipe_texture_stride(cbuf->texture, cbuf->level);
    }
 
-   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;
+   if (write_zstencil) {
+      struct pipe_surface *zsbuf = scene->fb.zsbuf;
+      rast->zsbuf.map = scene->zsbuf_map;
+      rast->zsbuf.stride = llvmpipe_texture_stride(zsbuf->texture, zsbuf->level);
+      rast->zsbuf.blocksize = 
+         util_format_get_blocksize(zsbuf->texture->format);
    }
 
+   lp_scene_bin_iter_begin( scene );
+   
    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;
-   }
+   int i;
 
-   if (rast->zsbuf_map) 
-      screen->transfer_unmap(screen, rast->zsbuf_transfer);
+   lp_scene_reset( rast->curr_scene );
 
-   if (rast->zsbuf_transfer)
-      screen->tex_transfer_destroy(rast->zsbuf_transfer);
+   for (i = 0; i < rast->state.nr_cbufs; i++)
+      rast->cbuf[i].map = NULL;
 
-   rast->zsbuf_transfer = NULL;
-   rast->zsbuf_map = NULL;
+   rast->zsbuf.map = NULL;
+   rast->curr_scene = 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_rast_start_tile(struct lp_rasterizer_task *task,
+                   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;
+   task->x = x;
+   task->y = y;
 }
 
 
@@ -170,12 +118,13 @@ lp_rast_start_tile( struct lp_rasterizer *rast,
  * 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 )
+void
+lp_rast_clear_color(struct lp_rasterizer_task *task,
+                    const union lp_rast_cmd_arg arg)
 {
+   struct lp_rasterizer *rast = task->rast;
    const uint8_t *clear_color = arg.clear_color;
-   uint8_t **color_tile = rast->tasks[thread_index].tile.color;
+   uint8_t **color_tile = task->tile.color;
    unsigned i;
 
    LP_DBG(DEBUG_RAST, "%s 0x%x,0x%x,0x%x,0x%x\n", __FUNCTION__, 
@@ -188,7 +137,7 @@ void lp_rast_clear_color( struct lp_rasterizer *rast,
        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++) {
+      for (i = 0; i < rast->state.nr_cbufs; i++) {
         memset(color_tile[i], clear_color[0], TILE_SIZE * TILE_SIZE * 4);
       }
    }
@@ -199,7 +148,7 @@ void lp_rast_clear_color( struct lp_rasterizer *rast,
        * works.
        */
       const unsigned chunk = TILE_SIZE / 4;
-      for (i = 0; i < rast->state.fb.nr_cbufs; i++) {
+      for (i = 0; i < rast->state.nr_cbufs; i++) {
          uint8_t *c = color_tile[i];
          unsigned j;
          for (j = 0; j < 4 * TILE_SIZE; j++) {
@@ -215,6 +164,8 @@ void lp_rast_clear_color( struct lp_rasterizer *rast,
          assert(c - color_tile[i] == TILE_SIZE * TILE_SIZE * 4);
       }
    }
+
+   LP_COUNT(nr_color_tile_clear);
 }
 
 
@@ -222,17 +173,62 @@ void lp_rast_clear_color( struct lp_rasterizer *rast,
  * 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)
+void
+lp_rast_clear_zstencil(struct lp_rasterizer_task *task,
+                       const union lp_rast_cmd_arg arg)
 {
-   unsigned i;
-   uint32_t *depth_tile = rast->tasks[thread_index].tile.depth;
-   
+   struct lp_rasterizer *rast = task->rast;
+   const unsigned tile_x = task->x;
+   const unsigned tile_y = task->y;
+   const unsigned height = TILE_SIZE / TILE_VECTOR_HEIGHT;
+   const unsigned width = TILE_SIZE * TILE_VECTOR_HEIGHT;
+   unsigned block_size = rast->zsbuf.blocksize;
+   uint8_t *dst;
+   unsigned dst_stride = rast->zsbuf.stride * TILE_VECTOR_HEIGHT;
+   unsigned i, j;
+
    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;
+   /*assert(rast->zsbuf.map);*/
+   if (!rast->zsbuf.map)
+      return;
+
+   LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
+
+   /*
+    * Clear the aera of the swizzled depth/depth buffer matching this tile, in
+    * stripes of TILE_VECTOR_HEIGHT x TILE_SIZE at a time.
+    *
+    * The swizzled depth format is such that the depths for
+    * TILE_VECTOR_HEIGHT x TILE_VECTOR_WIDTH pixels have consecutive offsets.
+    */
+
+   dst = lp_rast_depth_pointer(rast, tile_x, tile_y);
+
+   switch (block_size) {
+   case 1:
+      memset(dst, (uint8_t) arg.clear_zstencil, height * width);
+      break;
+   case 2:
+      for (i = 0; i < height; i++) {
+         uint16_t *row = (uint16_t *)dst;
+         for (j = 0; j < width; j++)
+            *row++ = (uint16_t) arg.clear_zstencil;
+         dst += dst_stride;
+      }
+      break;
+   case 4:
+      for (i = 0; i < height; i++) {
+         uint32_t *row = (uint32_t *)dst;
+         for (j = 0; j < width; j++)
+            *row++ = arg.clear_zstencil;
+         dst += dst_stride;
+      }
+      break;
+   default:
+      assert(0);
+      break;
+   }
 }
 
 
@@ -240,100 +236,42 @@ void lp_rast_clear_zstencil( struct lp_rasterizer *rast,
  * 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)
+void
+lp_rast_load_color(struct lp_rasterizer_task *task,
+                   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;
+   struct lp_rasterizer *rast = task->rast;
+   const unsigned x = task->x, 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)
+   for (i = 0; i < rast->state.nr_cbufs; i++) {
+      if (x >= rast->cbuf[i].width || y >= rast->cbuf[i].height)
         continue;
 
-      assert(w >= 0);
-      assert(h >= 0);
-      assert(w <= TILE_SIZE);
-      assert(h <= TILE_SIZE);
-
-      lp_tile_read_4ub(transfer->texture->format,
+      lp_tile_read_4ub(rast->cbuf[i].format,
                       task->tile.color[i],
-                      rast->cbuf_map[i]
-                      transfer->stride,
+                      rast->cbuf[i].map
+                      rast->cbuf[i].stride,
                       x, y,
-                      w, h);
-   }
-}
-
+                      TILE_SIZE, TILE_SIZE);
 
-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;
+      LP_COUNT(nr_color_tile_load);
    }
 }
 
-/**
- * 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 )
+void
+lp_rast_set_state(struct lp_rasterizer_task *task,
+                  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;
+   task->current_state = state;
 }
 
 
@@ -343,16 +281,15 @@ void lp_rast_set_state( struct lp_rasterizer *rast,
  * 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 )
+void
+lp_rast_shade_tile(struct lp_rasterizer_task *task,
+                   const union lp_rast_cmd_arg arg)
 {
-   struct lp_rasterizer_task *task = &rast->tasks[thread_index];
+   struct lp_rasterizer *rast = task->rast;
    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;
+   const unsigned tile_x = task->x, tile_y = task->y;
    unsigned x, y;
 
    LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
@@ -368,22 +305,23 @@ void lp_rast_shade_tile( struct lp_rasterizer *rast,
          block_offset = ((y / 4) * (16 * 16) + (x / 4) * 16);
 
          /* color buffer */
-         for (i = 0; i < rast->state.fb.nr_cbufs; i++)
+         for (i = 0; i < rast->state.nr_cbufs; i++)
             color[i] = tile->color[i] + 4 * block_offset;
 
          /* depth buffer */
-         depth = tile->depth + block_offset;
+         depth = lp_rast_depth_pointer(rast, tile_x + x, tile_y + y);
 
          /* 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 );
+         state->jit_function[RAST_WHOLE]( &state->jit_context,
+                                          tile_x + x, tile_y + y,
+                                          inputs->facing,
+                                          inputs->a0,
+                                          inputs->dadx,
+                                          inputs->dady,
+                                          color,
+                                          depth,
+                                          INT_MIN, INT_MIN, INT_MIN,
+                                          NULL, NULL, NULL );
       }
    }
 }
@@ -393,14 +331,13 @@ void lp_rast_shade_tile( struct lp_rasterizer *rast,
  * 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,
+void lp_rast_shade_quads( struct lp_rasterizer_task *task,
                           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_rasterizer *rast = task->rast;
    struct lp_rast_tile *tile = &task->tile;
    uint8_t *color[PIPE_MAX_COLOR_BUFS];
    void *depth;
@@ -408,7 +345,6 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast,
    unsigned ix, iy;
    int block_offset;
 
-#ifdef DEBUG
    assert(state);
 
    /* Sanity checks */
@@ -417,7 +353,6 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast,
 
    assert((x % 4) == 0);
    assert((y % 4) == 0);
-#endif
 
    ix = x % TILE_SIZE;
    iy = y % TILE_SIZE;
@@ -426,34 +361,33 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast,
    block_offset = ((iy / 4) * (16 * 16) + (ix / 4) * 16);
 
    /* color buffer */
-   for (i = 0; i < rast->state.fb.nr_cbufs; i++)
+   for (i = 0; i < rast->state.nr_cbufs; i++)
       color[i] = tile->color[i] + 4 * block_offset;
 
    /* depth buffer */
-   depth = tile->depth + block_offset;
+   depth = lp_rast_depth_pointer(rast, x, y);
 
 
-
-#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]);
+   state->jit_function[RAST_EDGE_TEST]( &state->jit_context,
+                                        x, y,
+                                        inputs->facing,
+                                        inputs->a0,
+                                        inputs->dadx,
+                                        inputs->dady,
+                                        color,
+                                        depth,
+                                        c1, c2, c3,
+                                        inputs->step[0],
+                                        inputs->step[1],
+                                        inputs->step[2]);
 }
 
 
@@ -513,141 +447,54 @@ outline_subtiles(uint8_t *tile)
 /**
  * Write the rasterizer's color tile to the framebuffer.
  */
-static void lp_rast_store_color( struct lp_rasterizer *rast,
-                                 unsigned thread_index)
+static void
+lp_rast_store_color(struct lp_rasterizer_task *task)
 {
-   struct lp_rasterizer_task *task = &rast->tasks[thread_index];
-   const unsigned x = task->x;
-   const unsigned y = task->y;
+   struct lp_rasterizer *rast = task->rast;
+   const unsigned x = task->x, 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)
+   for (i = 0; i < rast->state.nr_cbufs; i++) {
+      if (x >= rast->cbuf[i].width)
         continue;
 
-      if (y >= transfer->height)
+      if (y >= rast->cbuf[i].height)
         continue;
 
-      LP_DBG(DEBUG_RAST, "%s [%u] %d,%d %dx%d\n", __FUNCTION__,
-            thread_index, x, y, w, h);
+      LP_DBG(DEBUG_RAST, "%s [%u] %d,%d\n", __FUNCTION__,
+            task->thread_index, x, y);
 
       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,
+      lp_tile_write_4ub(rast->cbuf[i].format,
                        task->tile.color[i],
-                       rast->cbuf_map[i]
-                       transfer->stride,
+                       rast->cbuf[i].map
+                       rast->cbuf[i].stride,
                        x, y,
-                       w, h);
-   }
-}
+                       TILE_SIZE, TILE_SIZE);
 
-
-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;
+      LP_COUNT(nr_color_tile_store);
    }
 }
 
-/**
- * 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 )
+void
+lp_rast_fence(struct lp_rasterizer_task *task,
+              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 );
+   lp_fence_signal(fence);
 }
 
 
-/**
- * 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;
-}
 
 
 /**
@@ -657,25 +504,31 @@ release_scene( struct lp_rasterizer *rast,
  * Called per thread.
  */
 static void
-rasterize_bin( struct lp_rasterizer *rast,
-               unsigned thread_index,
-               const struct cmd_bin *bin,
-               int x, int y)
+rasterize_bin(struct lp_rasterizer_task *task,
+              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 );
+   lp_rast_start_tile( task, x * TILE_SIZE, y * TILE_SIZE );
 
    /* 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] );
+         block->cmd[k]( task, block->arg[k] );
       }
    }
 
-   lp_rast_end_tile( rast, thread_index );
+   /* Write the rasterizer's tiles to the framebuffer.
+    */
+   if (task->rast->state.write_color)
+      lp_rast_store_color(task);
+
+   /* Free data for this bin.
+    */
+   lp_scene_bin_reset( task->rast->curr_scene, x, y);
 }
 
 
@@ -687,7 +540,6 @@ static struct {
 } cmd_names[] = 
 {
    RAST(load_color),
-   RAST(load_zstencil),
    RAST(clear_color),
    RAST(clear_zstencil),
    RAST(triangle),
@@ -746,7 +598,6 @@ is_empty_bin( const struct cmd_bin *bin )
 
    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;
       }
@@ -761,10 +612,8 @@ is_empty_bin( const struct cmd_bin *bin )
  * Called per thread.
  */
 static void
-rasterize_scene( struct lp_rasterizer *rast,
-                unsigned thread_index,
-                struct lp_scene *scene,
-                bool write_depth )
+rasterize_scene(struct lp_rasterizer_task *task,
+                struct lp_scene *scene)
 {
    /* loop over scene bins, rasterize each */
 #if 0
@@ -772,9 +621,8 @@ rasterize_scene( struct lp_rasterizer *rast,
       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 );
+            struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
+            rasterize_bin(task, bin, i, j);
          }
       }
    }
@@ -786,7 +634,7 @@ rasterize_scene( struct lp_rasterizer *rast,
       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);
+            rasterize_bin(task, bin, x, y);
       }
    }
 #endif
@@ -797,44 +645,20 @@ rasterize_scene( struct lp_rasterizer *rast,
  * 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 )
+lp_rast_queue_scene( struct lp_rasterizer *rast,
+                     struct lp_scene *scene)
 {
-   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 );
+      lp_rast_begin( rast, scene );
 
-      release_scene( rast, scene );
+      rasterize_scene( &rast->tasks[0], scene );
 
-      lp_rast_end( rast );
+      lp_scene_reset( scene );
+      rast->curr_scene = NULL;
    }
    else {
       /* threaded rendering! */
@@ -846,14 +670,26 @@ lp_rasterize_scene( struct lp_rasterizer *rast,
       for (i = 0; i < rast->num_threads; i++) {
          pipe_semaphore_signal(&rast->tasks[i].work_ready);
       }
+   }
+
+   LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
+}
+
+
+void
+lp_rast_finish( struct lp_rasterizer *rast )
+{
+   if (rast->num_threads == 0) {
+      /* nothing to do */
+   }
+   else {
+      int i;
 
       /* 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__);
 }
 
 
@@ -876,24 +712,16 @@ static PIPE_THREAD_ROUTINE( thread_func, init_data )
          debug_printf("thread %d waiting for work\n", task->thread_index);
       pipe_semaphore_wait(&task->work_ready);
 
+      if (rast->exit_flag)
+         break;
+
       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 );
+         lp_rast_begin( rast, 
+                        lp_scene_dequeue( rast->full_scenes, TRUE ) );
       }
 
       /* Wait for all threads to get here so that threads[1+] don't
@@ -904,26 +732,23 @@ static PIPE_THREAD_ROUTINE( thread_func, init_data )
       /* 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);
+
+      rasterize_scene(task,
+                      rast->curr_scene);
       
       /* wait for all threads to finish with this scene */
       pipe_barrier_wait( &rast->barrier );
 
+      /* XXX: shouldn't be necessary:
+       */
       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);
    }
 
@@ -943,8 +768,12 @@ create_rast_threads(struct lp_rasterizer *rast)
    /* Multithreading not supported on windows until conditions and barriers are
     * properly implemented. */
    rast->num_threads = 0;
+#else
+#ifdef PIPE_OS_EMBEDDED
+   rast->num_threads = 0;
 #else
    rast->num_threads = util_cpu_caps.nr_cpus;
+#endif
    rast->num_threads = debug_get_num_option("LP_NUM_THREADS", rast->num_threads);
    rast->num_threads = MIN2(rast->num_threads, MAX_THREADS);
 #endif
@@ -966,7 +795,7 @@ create_rast_threads(struct lp_rasterizer *rast)
  *               processing them.
  */
 struct lp_rasterizer *
-lp_rast_create( struct pipe_screen *screen, struct lp_scene_queue *empty )
+lp_rast_create( void )
 {
    struct lp_rasterizer *rast;
    unsigned i, cbuf;
@@ -975,9 +804,6 @@ lp_rast_create( struct pipe_screen *screen, struct lp_scene_queue *empty )
    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++) {
@@ -986,7 +812,6 @@ lp_rast_create( struct pipe_screen *screen, struct lp_scene_queue *empty )
       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;
    }
@@ -1006,14 +831,31 @@ 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]);
    }
 
+   /* Set exit_flag and signal each thread's work_ready semaphore.
+    * Each thread will be woken up, notice that the exit_flag is set and
+    * break out of its main loop.  The thread will then exit.
+    */
+   rast->exit_flag = TRUE;
+   for (i = 0; i < rast->num_threads; i++) {
+      pipe_semaphore_signal(&rast->tasks[i].work_ready);
+   }
+
+   /* Wait for threads to terminate before cleaning up per-thread data */
+   for (i = 0; i < rast->num_threads; i++) {
+      pipe_thread_wait(rast->threads[i]);
+   }
+
+   /* Clean up per-thread data */
+   for (i = 0; i < rast->num_threads; i++) {
+      pipe_semaphore_destroy(&rast->tasks[i].work_ready);
+      pipe_semaphore_destroy(&rast->tasks[i].work_done);
+   }
+
    /* for synchronizing rasterization threads */
    pipe_barrier_destroy( &rast->barrier );