1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 * Render target tile caching.
35 #include "util/u_inlines.h"
36 #include "util/u_format.h"
37 #include "util/u_memory.h"
38 #include "util/u_tile.h"
39 #include "sp_tile_cache.h"
44 * Return the position in the cache for the tile that contains win pos (x,y).
45 * We currently use a direct mapped cache so this is like a hack key.
46 * At some point we should investige something more sophisticated, like
47 * a LRU replacement policy.
49 #define CACHE_POS(x, y) \
50 (((x) + (y) * 5) % NUM_ENTRIES)
55 * Is the tile at (x,y) in cleared state?
58 is_clear_flag_set(const uint
*bitvec
, union tile_address addr
)
61 pos
= addr
.bits
.y
* (MAX_WIDTH
/ TILE_SIZE
) + addr
.bits
.x
;
62 assert(pos
/ 32 < (MAX_WIDTH
/ TILE_SIZE
) * (MAX_HEIGHT
/ TILE_SIZE
) / 32);
63 bit
= bitvec
[pos
/ 32] & (1 << (pos
& 31));
69 * Mark the tile at (x,y) as not cleared.
72 clear_clear_flag(uint
*bitvec
, union tile_address addr
)
75 pos
= addr
.bits
.y
* (MAX_WIDTH
/ TILE_SIZE
) + addr
.bits
.x
;
76 assert(pos
/ 32 < (MAX_WIDTH
/ TILE_SIZE
) * (MAX_HEIGHT
/ TILE_SIZE
) / 32);
77 bitvec
[pos
/ 32] &= ~(1 << (pos
& 31));
81 struct softpipe_tile_cache
*
82 sp_create_tile_cache( struct pipe_context
*pipe
)
84 struct softpipe_tile_cache
*tc
;
86 int maxLevels
, maxTexSize
;
88 /* sanity checking: max sure MAX_WIDTH/HEIGHT >= largest texture image */
89 maxLevels
= pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
);
90 maxTexSize
= 1 << (maxLevels
- 1);
91 assert(MAX_WIDTH
>= maxTexSize
);
93 tc
= CALLOC_STRUCT( softpipe_tile_cache
);
96 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
97 tc
->entries
[pos
].addr
.bits
.invalid
= 1;
99 tc
->last_tile
= &tc
->entries
[0]; /* any tile */
101 /* XXX this code prevents valgrind warnings about use of uninitialized
102 * memory in programs that don't clear the surface before rendering.
103 * However, it breaks clearing in other situations (such as in
104 * progs/tests/drawbuffers, see bug 24402).
107 /* set flags to indicate all the tiles are cleared */
108 memset(tc
->clear_flags
, 255, sizeof(tc
->clear_flags
));
116 sp_destroy_tile_cache(struct softpipe_tile_cache
*tc
)
120 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
121 /*assert(tc->entries[pos].x < 0);*/
124 tc
->pipe
->transfer_destroy(tc
->pipe
, tc
->transfer
);
132 * Specify the surface to cache.
135 sp_tile_cache_set_surface(struct softpipe_tile_cache
*tc
,
136 struct pipe_surface
*ps
)
138 struct pipe_context
*pipe
= tc
->pipe
;
141 if (ps
== tc
->surface
)
144 if (tc
->transfer_map
) {
145 pipe
->transfer_unmap(pipe
, tc
->transfer
);
146 tc
->transfer_map
= NULL
;
149 pipe
->transfer_destroy(pipe
, tc
->transfer
);
156 tc
->transfer
= pipe_get_transfer(pipe
, ps
->texture
, ps
->face
,
157 ps
->level
, ps
->zslice
,
158 PIPE_TRANSFER_READ_WRITE
,
159 0, 0, ps
->width
, ps
->height
);
161 tc
->depth_stencil
= (ps
->format
== PIPE_FORMAT_Z24_UNORM_S8_USCALED
||
162 ps
->format
== PIPE_FORMAT_Z24X8_UNORM
||
163 ps
->format
== PIPE_FORMAT_S8_USCALED_Z24_UNORM
||
164 ps
->format
== PIPE_FORMAT_X8Z24_UNORM
||
165 ps
->format
== PIPE_FORMAT_Z16_UNORM
||
166 ps
->format
== PIPE_FORMAT_Z32_UNORM
||
167 ps
->format
== PIPE_FORMAT_S8_USCALED
);
173 * Return the transfer being cached.
175 struct pipe_surface
*
176 sp_tile_cache_get_surface(struct softpipe_tile_cache
*tc
)
183 sp_tile_cache_map_transfers(struct softpipe_tile_cache
*tc
)
185 if (tc
->transfer
&& !tc
->transfer_map
)
186 tc
->transfer_map
= tc
->pipe
->transfer_map(tc
->pipe
, tc
->transfer
);
191 sp_tile_cache_unmap_transfers(struct softpipe_tile_cache
*tc
)
193 if (tc
->transfer_map
) {
194 tc
->pipe
->transfer_unmap(tc
->pipe
, tc
->transfer
);
195 tc
->transfer_map
= NULL
;
201 * Set pixels in a tile to the given clear color/value, float.
204 clear_tile_rgba(struct softpipe_cached_tile
*tile
,
205 enum pipe_format format
,
206 const float clear_value
[4])
208 if (clear_value
[0] == 0.0 &&
209 clear_value
[1] == 0.0 &&
210 clear_value
[2] == 0.0 &&
211 clear_value
[3] == 0.0) {
212 memset(tile
->data
.color
, 0, sizeof(tile
->data
.color
));
216 for (i
= 0; i
< TILE_SIZE
; i
++) {
217 for (j
= 0; j
< TILE_SIZE
; j
++) {
218 tile
->data
.color
[i
][j
][0] = clear_value
[0];
219 tile
->data
.color
[i
][j
][1] = clear_value
[1];
220 tile
->data
.color
[i
][j
][2] = clear_value
[2];
221 tile
->data
.color
[i
][j
][3] = clear_value
[3];
229 * Set a tile to a solid value/color.
232 clear_tile(struct softpipe_cached_tile
*tile
,
233 enum pipe_format format
,
238 switch (util_format_get_blocksize(format
)) {
240 memset(tile
->data
.any
, clear_value
, TILE_SIZE
* TILE_SIZE
);
243 if (clear_value
== 0) {
244 memset(tile
->data
.any
, 0, 2 * TILE_SIZE
* TILE_SIZE
);
247 for (i
= 0; i
< TILE_SIZE
; i
++) {
248 for (j
= 0; j
< TILE_SIZE
; j
++) {
249 tile
->data
.depth16
[i
][j
] = (ushort
) clear_value
;
255 if (clear_value
== 0) {
256 memset(tile
->data
.any
, 0, 4 * TILE_SIZE
* TILE_SIZE
);
259 for (i
= 0; i
< TILE_SIZE
; i
++) {
260 for (j
= 0; j
< TILE_SIZE
; j
++) {
261 tile
->data
.color32
[i
][j
] = clear_value
;
273 * Actually clear the tiles which were flagged as being in a clear state.
276 sp_tile_cache_flush_clear(struct softpipe_tile_cache
*tc
)
278 struct pipe_transfer
*pt
= tc
->transfer
;
279 const uint w
= tc
->transfer
->box
.width
;
280 const uint h
= tc
->transfer
->box
.height
;
284 assert(pt
->resource
);
285 /* clear the scratch tile to the clear value */
286 clear_tile(&tc
->tile
, pt
->resource
->format
, tc
->clear_val
);
288 /* push the tile to all positions marked as clear */
289 for (y
= 0; y
< h
; y
+= TILE_SIZE
) {
290 for (x
= 0; x
< w
; x
+= TILE_SIZE
) {
291 union tile_address addr
= tile_address(x
, y
);
293 if (is_clear_flag_set(tc
->clear_flags
, addr
)) {
294 pipe_put_tile_raw(tc
->pipe
,
296 x
, y
, TILE_SIZE
, TILE_SIZE
,
297 tc
->tile
.data
.color32
, 0/*STRIDE*/);
304 /* reset all clear flags to zero */
305 memset(tc
->clear_flags
, 0, sizeof(tc
->clear_flags
));
308 debug_printf("num cleared: %u\n", numCleared
);
314 * Flush the tile cache: write all dirty tiles back to the transfer.
315 * any tiles "flagged" as cleared will be "really" cleared.
318 sp_flush_tile_cache(struct softpipe_tile_cache
*tc
)
320 struct pipe_transfer
*pt
= tc
->transfer
;
324 /* caching a drawing transfer */
325 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
326 struct softpipe_cached_tile
*tile
= tc
->entries
+ pos
;
327 if (!tile
->addr
.bits
.invalid
) {
328 if (tc
->depth_stencil
) {
329 pipe_put_tile_raw(tc
->pipe
, pt
,
330 tile
->addr
.bits
.x
* TILE_SIZE
,
331 tile
->addr
.bits
.y
* TILE_SIZE
,
332 TILE_SIZE
, TILE_SIZE
,
333 tile
->data
.depth32
, 0/*STRIDE*/);
336 pipe_put_tile_rgba(tc
->pipe
, pt
,
337 tile
->addr
.bits
.x
* TILE_SIZE
,
338 tile
->addr
.bits
.y
* TILE_SIZE
,
339 TILE_SIZE
, TILE_SIZE
,
340 (float *) tile
->data
.color
);
342 tile
->addr
.bits
.invalid
= 1; /* mark as empty */
347 sp_tile_cache_flush_clear(tc
);
351 debug_printf("flushed tiles in use: %d\n", inuse
);
357 * Get a tile from the cache.
358 * \param x, y position of tile, in pixels
360 struct softpipe_cached_tile
*
361 sp_find_cached_tile(struct softpipe_tile_cache
*tc
,
362 union tile_address addr
)
364 struct pipe_transfer
*pt
= tc
->transfer
;
366 /* cache pos/entry: */
367 const int pos
= CACHE_POS(addr
.bits
.x
,
369 struct softpipe_cached_tile
*tile
= tc
->entries
+ pos
;
371 if (addr
.value
!= tile
->addr
.value
) {
373 assert(pt
->resource
);
374 if (tile
->addr
.bits
.invalid
== 0) {
375 /* put dirty tile back in framebuffer */
376 if (tc
->depth_stencil
) {
377 pipe_put_tile_raw(tc
->pipe
, pt
,
378 tile
->addr
.bits
.x
* TILE_SIZE
,
379 tile
->addr
.bits
.y
* TILE_SIZE
,
380 TILE_SIZE
, TILE_SIZE
,
381 tile
->data
.depth32
, 0/*STRIDE*/);
384 pipe_put_tile_rgba(tc
->pipe
, pt
,
385 tile
->addr
.bits
.x
* TILE_SIZE
,
386 tile
->addr
.bits
.y
* TILE_SIZE
,
387 TILE_SIZE
, TILE_SIZE
,
388 (float *) tile
->data
.color
);
394 if (is_clear_flag_set(tc
->clear_flags
, addr
)) {
395 /* don't get tile from framebuffer, just clear it */
396 if (tc
->depth_stencil
) {
397 clear_tile(tile
, pt
->resource
->format
, tc
->clear_val
);
400 clear_tile_rgba(tile
, pt
->resource
->format
, tc
->clear_color
);
402 clear_clear_flag(tc
->clear_flags
, addr
);
405 /* get new tile data from transfer */
406 if (tc
->depth_stencil
) {
407 pipe_get_tile_raw(tc
->pipe
, pt
,
408 tile
->addr
.bits
.x
* TILE_SIZE
,
409 tile
->addr
.bits
.y
* TILE_SIZE
,
410 TILE_SIZE
, TILE_SIZE
,
411 tile
->data
.depth32
, 0/*STRIDE*/);
414 pipe_get_tile_rgba(tc
->pipe
, pt
,
415 tile
->addr
.bits
.x
* TILE_SIZE
,
416 tile
->addr
.bits
.y
* TILE_SIZE
,
417 TILE_SIZE
, TILE_SIZE
,
418 (float *) tile
->data
.color
);
423 tc
->last_tile
= tile
;
432 * When a whole surface is being cleared to a value we can avoid
433 * fetching tiles above.
434 * Save the color and set a 'clearflag' for each tile of the screen.
437 sp_tile_cache_clear(struct softpipe_tile_cache
*tc
, const float *rgba
,
442 tc
->clear_color
[0] = rgba
[0];
443 tc
->clear_color
[1] = rgba
[1];
444 tc
->clear_color
[2] = rgba
[2];
445 tc
->clear_color
[3] = rgba
[3];
447 tc
->clear_val
= clearValue
;
449 /* set flags to indicate all the tiles are cleared */
450 memset(tc
->clear_flags
, 255, sizeof(tc
->clear_flags
));
452 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
453 struct softpipe_cached_tile
*tile
= tc
->entries
+ pos
;
454 tile
->addr
.bits
.invalid
= 1;