summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/softpipe/sp_tile_cache.c
blob: 7551b923fb7607fbc8a55a05be22926a2682b63a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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 TUNGSTEN GRAPHICS 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.
 * 
 **************************************************************************/

/**
 * Render target tile caching.
 *
 * Author:
 *    Brian Paul
 */

#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_memory.h"
#include "util/u_tile.h"
#include "sp_tile_cache.h"



/**
 * Return the position in the cache for the tile that contains win pos (x,y).
 * We currently use a direct mapped cache so this is like a hack key.
 * At some point we should investige something more sophisticated, like
 * a LRU replacement policy.
 */
#define CACHE_POS(x, y) \
   (((x) + (y) * 5) % NUM_ENTRIES)



/**
 * Is the tile at (x,y) in cleared state?
 */
static INLINE uint
is_clear_flag_set(const uint *bitvec, union tile_address addr)
{
   int pos, bit;
   pos = addr.bits.y * (MAX_WIDTH / TILE_SIZE) + addr.bits.x;
   assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
   bit = bitvec[pos / 32] & (1 << (pos & 31));
   return bit;
}
   

/**
 * Mark the tile at (x,y) as not cleared.
 */
static INLINE void
clear_clear_flag(uint *bitvec, union tile_address addr)
{
   int pos;
   pos = addr.bits.y * (MAX_WIDTH / TILE_SIZE) + addr.bits.x;
   assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
   bitvec[pos / 32] &= ~(1 << (pos & 31));
}
   

struct softpipe_tile_cache *
sp_create_tile_cache( struct pipe_context *pipe )
{
   struct softpipe_tile_cache *tc;
   uint pos;
   int maxLevels, maxTexSize;

   /* sanity checking: max sure MAX_WIDTH/HEIGHT >= largest texture image */
   maxLevels = pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS);
   maxTexSize = 1 << (maxLevels - 1);
   assert(MAX_WIDTH >= maxTexSize);

   tc = CALLOC_STRUCT( softpipe_tile_cache );
   if (tc) {
      tc->pipe = pipe;
      for (pos = 0; pos < NUM_ENTRIES; pos++) {
         tc->entries[pos].addr.bits.invalid = 1;
      }
      tc->last_tile = &tc->entries[0]; /* any tile */

      /* XXX this code prevents valgrind warnings about use of uninitialized
       * memory in programs that don't clear the surface before rendering.
       * However, it breaks clearing in other situations (such as in
       * progs/tests/drawbuffers, see bug 24402).
       */
#if 0 && TILE_CLEAR_OPTIMIZATION
      /* set flags to indicate all the tiles are cleared */
      memset(tc->clear_flags, 255, sizeof(tc->clear_flags));
#endif
   }
   return tc;
}


void
sp_destroy_tile_cache(struct softpipe_tile_cache *tc)
{
   uint pos;

   for (pos = 0; pos < NUM_ENTRIES; pos++) {
      /*assert(tc->entries[pos].x < 0);*/
   }
   if (tc->transfer) {
      tc->pipe->tex_transfer_destroy(tc->pipe, tc->transfer);
   }

   FREE( tc );
}


/**
 * Specify the surface to cache.
 */
void
sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
                          struct pipe_surface *ps)
{
   struct pipe_context *pipe = tc->pipe;

   if (tc->transfer) {
      if (ps == tc->surface)
         return;

      if (tc->transfer_map) {
         pipe->transfer_unmap(pipe, tc->transfer);
         tc->transfer_map = NULL;
      }

      pipe->tex_transfer_destroy(pipe, tc->transfer);
      tc->transfer = NULL;
   }

   tc->surface = ps;

   if (ps) {
      tc->transfer = pipe->get_tex_transfer(pipe, ps->texture, ps->face,
                                              ps->level, ps->zslice,
                                              PIPE_TRANSFER_READ_WRITE,
                                              0, 0, ps->width, ps->height);

      tc->depth_stencil = (ps->format == PIPE_FORMAT_Z24_UNORM_S8_USCALED ||
                           ps->format == PIPE_FORMAT_Z24X8_UNORM ||
                           ps->format == PIPE_FORMAT_S8_USCALED_Z24_UNORM ||
                           ps->format == PIPE_FORMAT_X8Z24_UNORM ||
                           ps->format == PIPE_FORMAT_Z16_UNORM ||
                           ps->format == PIPE_FORMAT_Z32_UNORM ||
                           ps->format == PIPE_FORMAT_S8_USCALED);
   }
}


/**
 * Return the transfer being cached.
 */
struct pipe_surface *
sp_tile_cache_get_surface(struct softpipe_tile_cache *tc)
{
   return tc->surface;
}


void
sp_tile_cache_map_transfers(struct softpipe_tile_cache *tc)
{
   if (tc->transfer && !tc->transfer_map)
      tc->transfer_map = tc->pipe->transfer_map(tc->pipe, tc->transfer);
}


void
sp_tile_cache_unmap_transfers(struct softpipe_tile_cache *tc)
{
   if (tc->transfer_map) {
      tc->pipe->transfer_unmap(tc->pipe, tc->transfer);
      tc->transfer_map = NULL;
   }
}


/**
 * Set pixels in a tile to the given clear color/value, float.
 */
static void
clear_tile_rgba(struct softpipe_cached_tile *tile,
                enum pipe_format format,
                const float clear_value[4])
{
   if (clear_value[0] == 0.0 &&
       clear_value[1] == 0.0 &&
       clear_value[2] == 0.0 &&
       clear_value[3] == 0.0) {
      memset(tile->data.color, 0, sizeof(tile->data.color));
   }
   else {
      uint i, j;
      for (i = 0; i < TILE_SIZE; i++) {
         for (j = 0; j < TILE_SIZE; j++) {
            tile->data.color[i][j][0] = clear_value[0];
            tile->data.color[i][j][1] = clear_value[1];
            tile->data.color[i][j][2] = clear_value[2];
            tile->data.color[i][j][3] = clear_value[3];
         }
      }
   }
}


/**
 * Set a tile to a solid value/color.
 */
static void
clear_tile(struct softpipe_cached_tile *tile,
           enum pipe_format format,
           uint clear_value)
{
   uint i, j;

   switch (util_format_get_blocksize(format)) {
   case 1:
      memset(tile->data.any, clear_value, TILE_SIZE * TILE_SIZE);
      break;
   case 2:
      if (clear_value == 0) {
         memset(tile->data.any, 0, 2 * TILE_SIZE * TILE_SIZE);
      }
      else {
         for (i = 0; i < TILE_SIZE; i++) {
            for (j = 0; j < TILE_SIZE; j++) {
               tile->data.depth16[i][j] = (ushort) clear_value;
            }
         }
      }
      break;
   case 4:
      if (clear_value == 0) {
         memset(tile->data.any, 0, 4 * TILE_SIZE * TILE_SIZE);
      }
      else {
         for (i = 0; i < TILE_SIZE; i++) {
            for (j = 0; j < TILE_SIZE; j++) {
               tile->data.color32[i][j] = clear_value;
            }
         }
      }
      break;
   default:
      assert(0);
   }
}


/**
 * Actually clear the tiles which were flagged as being in a clear state.
 */
static void
sp_tile_cache_flush_clear(struct softpipe_tile_cache *tc)
{
   struct pipe_transfer *pt = tc->transfer;
   const uint w = tc->transfer->width;
   const uint h = tc->transfer->height;
   uint x, y;
   uint numCleared = 0;

   assert(pt->texture);
   /* clear the scratch tile to the clear value */
   clear_tile(&tc->tile, pt->texture->format, tc->clear_val);

   /* push the tile to all positions marked as clear */
   for (y = 0; y < h; y += TILE_SIZE) {
      for (x = 0; x < w; x += TILE_SIZE) {
         union tile_address addr = tile_address(x, y);

         if (is_clear_flag_set(tc->clear_flags, addr)) {
            pipe_put_tile_raw(tc->pipe,
                              pt,
                              x, y, TILE_SIZE, TILE_SIZE,
                              tc->tile.data.color32, 0/*STRIDE*/);

            numCleared++;
         }
      }
   }

   /* reset all clear flags to zero */
   memset(tc->clear_flags, 0, sizeof(tc->clear_flags));

#if 0
   debug_printf("num cleared: %u\n", numCleared);
#endif
}


/**
 * Flush the tile cache: write all dirty tiles back to the transfer.
 * any tiles "flagged" as cleared will be "really" cleared.
 */
void
sp_flush_tile_cache(struct softpipe_tile_cache *tc)
{
   struct pipe_transfer *pt = tc->transfer;
   int inuse = 0, pos;

   if (pt) {
      /* caching a drawing transfer */
      for (pos = 0; pos < NUM_ENTRIES; pos++) {
         struct softpipe_cached_tile *tile = tc->entries + pos;
         if (!tile->addr.bits.invalid) {
            if (tc->depth_stencil) {
               pipe_put_tile_raw(tc->pipe, pt,
                                 tile->addr.bits.x * TILE_SIZE, 
                                 tile->addr.bits.y * TILE_SIZE, 
                                 TILE_SIZE, TILE_SIZE,
                                 tile->data.depth32, 0/*STRIDE*/);
            }
            else {
               pipe_put_tile_rgba(tc->pipe, pt,
                                  tile->addr.bits.x * TILE_SIZE, 
                                  tile->addr.bits.y * TILE_SIZE, 
                                  TILE_SIZE, TILE_SIZE,
                                  (float *) tile->data.color);
            }
            tile->addr.bits.invalid = 1;  /* mark as empty */
            inuse++;
         }
      }

#if TILE_CLEAR_OPTIMIZATION
      sp_tile_cache_flush_clear(tc);
#endif
   }

#if 0
   debug_printf("flushed tiles in use: %d\n", inuse);
#endif
}


/**
 * Get a tile from the cache.
 * \param x, y  position of tile, in pixels
 */
struct softpipe_cached_tile *
sp_find_cached_tile(struct softpipe_tile_cache *tc, 
                    union tile_address addr )
{
   struct pipe_transfer *pt = tc->transfer;
   
   /* cache pos/entry: */
   const int pos = CACHE_POS(addr.bits.x,
                             addr.bits.y);
   struct softpipe_cached_tile *tile = tc->entries + pos;

   if (addr.value != tile->addr.value) {

      assert(pt->texture);
      if (tile->addr.bits.invalid == 0) {
         /* put dirty tile back in framebuffer */
         if (tc->depth_stencil) {
            pipe_put_tile_raw(tc->pipe, pt,
                              tile->addr.bits.x * TILE_SIZE,
                              tile->addr.bits.y * TILE_SIZE,
                              TILE_SIZE, TILE_SIZE,
                              tile->data.depth32, 0/*STRIDE*/);
         }
         else {
            pipe_put_tile_rgba(tc->pipe, pt,
                               tile->addr.bits.x * TILE_SIZE,
                               tile->addr.bits.y * TILE_SIZE,
                               TILE_SIZE, TILE_SIZE,
                               (float *) tile->data.color);
         }
      }

      tile->addr = addr;

      if (is_clear_flag_set(tc->clear_flags, addr)) {
         /* don't get tile from framebuffer, just clear it */
         if (tc->depth_stencil) {
            clear_tile(tile, pt->texture->format, tc->clear_val);
         }
         else {
            clear_tile_rgba(tile, pt->texture->format, tc->clear_color);
         }
         clear_clear_flag(tc->clear_flags, addr);
      }
      else {
         /* get new tile data from transfer */
         if (tc->depth_stencil) {
            pipe_get_tile_raw(tc->pipe, pt,
                              tile->addr.bits.x * TILE_SIZE, 
                              tile->addr.bits.y * TILE_SIZE, 
                              TILE_SIZE, TILE_SIZE,
                              tile->data.depth32, 0/*STRIDE*/);
         }
         else {
            pipe_get_tile_rgba(tc->pipe, pt,
                               tile->addr.bits.x * TILE_SIZE, 
                               tile->addr.bits.y * TILE_SIZE,
                               TILE_SIZE, TILE_SIZE,
                               (float *) tile->data.color);
         }
      }
   }

   tc->last_tile = tile;
   return tile;
}





/**
 * When a whole surface is being cleared to a value we can avoid
 * fetching tiles above.
 * Save the color and set a 'clearflag' for each tile of the screen.
 */
void
sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float *rgba,
                    uint clearValue)
{
   uint pos;

   tc->clear_color[0] = rgba[0];
   tc->clear_color[1] = rgba[1];
   tc->clear_color[2] = rgba[2];
   tc->clear_color[3] = rgba[3];

   tc->clear_val = clearValue;

#if TILE_CLEAR_OPTIMIZATION
   /* set flags to indicate all the tiles are cleared */
   memset(tc->clear_flags, 255, sizeof(tc->clear_flags));
#else
   /* disable the optimization */
   memset(tc->clear_flags, 0, sizeof(tc->clear_flags));
#endif

   for (pos = 0; pos < NUM_ENTRIES; pos++) {
      struct softpipe_cached_tile *tile = tc->entries + pos;
      tile->addr.bits.invalid = 1;
   }
}