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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  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:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  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.
  25.  *
  26.  **************************************************************************/
  27.  
  28. #ifndef SP_TILE_CACHE_H
  29. #define SP_TILE_CACHE_H
  30.  
  31.  
  32. #include "pipe/p_compiler.h"
  33. #include "sp_texture.h"
  34.  
  35.  
  36. struct softpipe_tile_cache;
  37.  
  38.  
  39. /**
  40.  * Cache tile size (width and height). This needs to be a power of two.
  41.  */
  42. #define TILE_SIZE_LOG2 6
  43. #define TILE_SIZE (1 << TILE_SIZE_LOG2)
  44.  
  45.  
  46. #define TILE_ADDR_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1 - TILE_SIZE_LOG2)
  47.  
  48.  
  49. /**
  50.  * Surface tile address as a union for fast compares.
  51.  */
  52. union tile_address {
  53.    struct {
  54.       unsigned x:TILE_ADDR_BITS;     /* 16K / TILE_SIZE */
  55.       unsigned y:TILE_ADDR_BITS;     /* 16K / TILE_SIZE */
  56.       unsigned invalid:1;
  57.       unsigned pad:15;
  58.    } bits;
  59.    unsigned value;
  60. };
  61.  
  62.  
  63. struct softpipe_cached_tile
  64. {
  65.    union {
  66.       float color[TILE_SIZE][TILE_SIZE][4];
  67.       uint color32[TILE_SIZE][TILE_SIZE];
  68.       uint depth32[TILE_SIZE][TILE_SIZE];
  69.       ushort depth16[TILE_SIZE][TILE_SIZE];
  70.       ubyte stencil8[TILE_SIZE][TILE_SIZE];
  71.       uint colorui128[TILE_SIZE][TILE_SIZE][4];
  72.       int colori128[TILE_SIZE][TILE_SIZE][4];
  73.       uint64_t depth64[TILE_SIZE][TILE_SIZE];
  74.       ubyte any[1];
  75.    } data;
  76. };
  77.  
  78. #define NUM_ENTRIES 50
  79.  
  80.  
  81. struct softpipe_tile_cache
  82. {
  83.    struct pipe_context *pipe;
  84.    struct pipe_surface *surface;  /**< the surface we're caching */
  85.    struct pipe_transfer *transfer;
  86.    void *transfer_map;
  87.  
  88.    union tile_address tile_addrs[NUM_ENTRIES];
  89.    struct softpipe_cached_tile *entries[NUM_ENTRIES];
  90.    uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
  91.    union pipe_color_union clear_color; /**< for color bufs */
  92.    uint64_t clear_val;        /**< for z+stencil */
  93.    boolean depth_stencil; /**< Is the surface a depth/stencil format? */
  94.  
  95.    struct softpipe_cached_tile *tile;  /**< scratch tile for clears */
  96.  
  97.    union tile_address last_tile_addr;
  98.    struct softpipe_cached_tile *last_tile;  /**< most recently retrieved tile */
  99. };
  100.  
  101.  
  102. extern struct softpipe_tile_cache *
  103. sp_create_tile_cache( struct pipe_context *pipe );
  104.  
  105. extern void
  106. sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
  107.  
  108. extern void
  109. sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
  110.                           struct pipe_surface *sps);
  111.  
  112. extern struct pipe_surface *
  113. sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
  114.  
  115. extern void
  116. sp_flush_tile_cache(struct softpipe_tile_cache *tc);
  117.  
  118. extern void
  119. sp_tile_cache_clear(struct softpipe_tile_cache *tc,
  120.                     const union pipe_color_union *color,
  121.                     uint64_t clearValue);
  122.  
  123. extern struct softpipe_cached_tile *
  124. sp_find_cached_tile(struct softpipe_tile_cache *tc,
  125.                     union tile_address addr );
  126.  
  127.  
  128. static INLINE union tile_address
  129. tile_address( unsigned x,
  130.               unsigned y )
  131. {
  132.    union tile_address addr;
  133.  
  134.    addr.value = 0;
  135.    addr.bits.x = x / TILE_SIZE;
  136.    addr.bits.y = y / TILE_SIZE;
  137.      
  138.    return addr;
  139. }
  140.  
  141. /* Quickly retrieve tile if it matches last lookup.
  142.  */
  143. static INLINE struct softpipe_cached_tile *
  144. sp_get_cached_tile(struct softpipe_tile_cache *tc,
  145.                    int x, int y )
  146. {
  147.    union tile_address addr = tile_address( x, y );
  148.  
  149.    if (tc->last_tile_addr.value == addr.value)
  150.       return tc->last_tile;
  151.  
  152.    return sp_find_cached_tile( tc, addr );
  153. }
  154.  
  155.  
  156.  
  157.  
  158. #endif /* SP_TILE_CACHE_H */
  159.  
  160.