1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
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11 * permit persons to whom the Software is furnished to do so, subject to
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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
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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 **************************************************************************/
30 * Binner data structures and bin-related functions.
31 * Note: the "setup" code is concerned with building scenes while
32 * The "rast" code is concerned with consuming/executing scenes.
38 #include "os/os_thread.h"
39 #include "lp_tile_soa.h"
42 struct lp_scene_queue;
44 /* We're limited to 2K by 2K for 32bit fixed point rasterization.
45 * Will need a 64-bit version for larger framebuffers.
47 #define MAXHEIGHT 2048
49 #define TILES_X (MAXWIDTH / TILE_SIZE)
50 #define TILES_Y (MAXHEIGHT / TILE_SIZE)
53 #define CMD_BLOCK_MAX 128
54 #define DATA_BLOCK_SIZE (16 * 1024 - sizeof(unsigned) - sizeof(void *))
58 /* switch to a non-pointer value for this:
60 typedef void (*lp_rast_cmd)( struct lp_rasterizer_task *,
61 const union lp_rast_cmd_arg );
64 lp_rast_cmd cmd[CMD_BLOCK_MAX];
65 union lp_rast_cmd_arg arg[CMD_BLOCK_MAX];
67 struct cmd_block *next;
71 ubyte data[DATA_BLOCK_SIZE];
73 struct data_block *next;
76 struct cmd_block_list {
77 struct cmd_block *head;
78 struct cmd_block *tail;
82 * For each screen tile we have one of these bins.
85 struct cmd_block_list commands;
90 * This stores bulk data which is shared by all bins within a scene.
91 * Examples include triangle data and state data. The commands in
92 * the per-tile bins will point to chunks of data in this structure.
94 struct data_block_list {
95 struct data_block *head;
96 struct data_block *tail;
100 /** List of texture references */
102 struct pipe_texture *texture;
103 struct texture_ref *prev, *next; /**< linked list w/ u_simple_list.h */
108 * All bins and bin data are contained here.
109 * Per-bin data goes into the 'tile' bins.
110 * Shared data goes into the 'data' buffer.
112 * When there are multiple threads, will want to double-buffer between
116 struct pipe_context *pipe;
118 /* Scene's buffers are mapped at the time the scene is enqueued:
120 void *cbuf_map[PIPE_MAX_COLOR_BUFS];
123 /** the framebuffer to render the scene into */
124 struct pipe_framebuffer_state fb;
126 /** list of textures referenced by the scene commands */
127 struct texture_ref textures;
132 * Number of active tiles in each dimension.
133 * This basically the framebuffer size divided by tile size
135 unsigned tiles_x, tiles_y;
137 int curr_x, curr_y; /**< for iterating over bins */
140 /* Where to place this scene once it has been rasterized:
142 struct lp_scene_queue *empty_queue;
144 struct cmd_bin tile[TILES_X][TILES_Y];
145 struct data_block_list data;
150 struct lp_scene *lp_scene_create(struct pipe_context *pipe,
151 struct lp_scene_queue *empty_queue);
153 void lp_scene_destroy(struct lp_scene *scene);
157 boolean lp_scene_is_empty(struct lp_scene *scene );
159 void lp_scene_reset(struct lp_scene *scene );
162 void lp_bin_new_data_block( struct data_block_list *list );
164 void lp_bin_new_cmd_block( struct cmd_block_list *list );
166 unsigned lp_scene_data_size( const struct lp_scene *scene );
168 unsigned lp_scene_bin_size( const struct lp_scene *scene, unsigned x, unsigned y );
170 void lp_scene_texture_reference( struct lp_scene *scene,
171 struct pipe_texture *texture );
173 boolean lp_scene_is_texture_referenced( const struct lp_scene *scene,
174 const struct pipe_texture *texture );
178 * Allocate space for a command/data in the bin's data buffer.
179 * Grow the block list if needed.
182 lp_scene_alloc( struct lp_scene *scene, unsigned size)
184 struct data_block_list *list = &scene->data;
186 if (list->tail->used + size > DATA_BLOCK_SIZE) {
187 lp_bin_new_data_block( list );
191 struct data_block *tail = list->tail;
192 ubyte *data = tail->data + tail->used;
200 * As above, but with specific alignment.
203 lp_scene_alloc_aligned( struct lp_scene *scene, unsigned size,
206 struct data_block_list *list = &scene->data;
208 if (list->tail->used + size + alignment - 1 > DATA_BLOCK_SIZE) {
209 lp_bin_new_data_block( list );
213 struct data_block *tail = list->tail;
214 ubyte *data = tail->data + tail->used;
215 unsigned offset = (((uintptr_t)data + alignment - 1) & ~(alignment - 1)) - (uintptr_t)data;
216 tail->used += offset + size;
217 return data + offset;
222 /* Put back data if we decide not to use it, eg. culled triangles.
225 lp_scene_putback_data( struct lp_scene *scene, unsigned size)
227 struct data_block_list *list = &scene->data;
228 assert(list->tail->used >= size);
229 list->tail->used -= size;
233 /** Return pointer to a particular tile's bin. */
234 static INLINE struct cmd_bin *
235 lp_scene_get_bin(struct lp_scene *scene, unsigned x, unsigned y)
237 return &scene->tile[x][y];
241 /** Remove all commands from a bin */
243 lp_scene_bin_reset(struct lp_scene *scene, unsigned x, unsigned y);
246 /* Add a command to bin[x][y].
249 lp_scene_bin_command( struct lp_scene *scene,
250 unsigned x, unsigned y,
252 union lp_rast_cmd_arg arg )
254 struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
255 struct cmd_block_list *list = &bin->commands;
257 assert(x < scene->tiles_x);
258 assert(y < scene->tiles_y);
260 if (list->tail->count == CMD_BLOCK_MAX) {
261 lp_bin_new_cmd_block( list );
265 struct cmd_block *tail = list->tail;
266 unsigned i = tail->count;
274 /* Add a command to all active bins.
277 lp_scene_bin_everywhere( struct lp_scene *scene,
279 const union lp_rast_cmd_arg arg )
282 for (i = 0; i < scene->tiles_x; i++)
283 for (j = 0; j < scene->tiles_y; j++)
284 lp_scene_bin_command( scene, i, j, cmd, arg );
289 lp_scene_bin_state_command( struct lp_scene *scene,
291 const union lp_rast_cmd_arg arg );
294 static INLINE unsigned
295 lp_scene_get_num_bins( const struct lp_scene *scene )
297 return scene->tiles_x * scene->tiles_y;
302 lp_scene_bin_iter_begin( struct lp_scene *scene );
305 lp_scene_bin_iter_next( struct lp_scene *scene, int *bin_x, int *bin_y );
308 lp_scene_rasterize( struct lp_scene *scene,
309 struct lp_rasterizer *rast,
310 boolean write_depth );
313 lp_scene_begin_binning( struct lp_scene *scene,
314 struct pipe_framebuffer_state *fb );
316 #endif /* LP_BIN_H */