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 **************************************************************************/
28 #ifndef SP_TILE_CACHE_H
29 #define SP_TILE_CACHE_H
32 #include "pipe/p_compiler.h"
33 #include "sp_texture.h"
36 struct softpipe_tile_cache;
40 * Cache tile size (width and height). This needs to be a power of two.
42 #define TILE_SIZE_LOG2 6
43 #define TILE_SIZE (1 << TILE_SIZE_LOG2)
46 #define TILE_ADDR_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1 - TILE_SIZE_LOG2)
50 * Surface tile address as a union for fast compares.
54 unsigned x:TILE_ADDR_BITS; /* 16K / TILE_SIZE */
55 unsigned y:TILE_ADDR_BITS; /* 16K / TILE_SIZE */
63 struct softpipe_cached_tile
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];
75 #define NUM_ENTRIES 50
78 struct softpipe_tile_cache
80 struct pipe_context *pipe;
81 struct pipe_surface *surface; /**< the surface we're caching */
82 struct pipe_transfer *transfer;
85 union tile_address tile_addrs[NUM_ENTRIES];
86 struct softpipe_cached_tile *entries[NUM_ENTRIES];
87 uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
88 float clear_color[4]; /**< for color bufs */
89 uint clear_val; /**< for z+stencil */
90 boolean depth_stencil; /**< Is the surface a depth/stencil format? */
92 struct softpipe_cached_tile *tile; /**< scratch tile for clears */
94 union tile_address last_tile_addr;
95 struct softpipe_cached_tile *last_tile; /**< most recently retrieved tile */
99 extern struct softpipe_tile_cache *
100 sp_create_tile_cache( struct pipe_context *pipe );
103 sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
106 sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
107 struct pipe_surface *sps);
109 extern struct pipe_surface *
110 sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
113 sp_tile_cache_map_transfers(struct softpipe_tile_cache *tc);
116 sp_tile_cache_unmap_transfers(struct softpipe_tile_cache *tc);
119 sp_flush_tile_cache(struct softpipe_tile_cache *tc);
122 sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float *rgba,
125 extern struct softpipe_cached_tile *
126 sp_find_cached_tile(struct softpipe_tile_cache *tc,
127 union tile_address addr );
130 static INLINE union tile_address
131 tile_address( unsigned x,
134 union tile_address addr;
137 addr.bits.x = x / TILE_SIZE;
138 addr.bits.y = y / TILE_SIZE;
143 /* Quickly retrieve tile if it matches last lookup.
145 static INLINE struct softpipe_cached_tile *
146 sp_get_cached_tile(struct softpipe_tile_cache *tc,
149 union tile_address addr = tile_address( x, y );
151 if (tc->last_tile_addr.value == addr.value)
152 return tc->last_tile;
154 return sp_find_cached_tile( tc, addr );
160 #endif /* SP_TILE_CACHE_H */