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1 /**************************************************************************
2  *
3  * Copyright 2007 VMware, Inc.
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 VMWARE 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 layer:8;
58       unsigned pad:7;
59    } bits;
60    unsigned value;
61 };
62 
63 
64 struct softpipe_cached_tile
65 {
66    union {
67       float color[TILE_SIZE][TILE_SIZE][4];
68       uint color32[TILE_SIZE][TILE_SIZE];
69       uint depth32[TILE_SIZE][TILE_SIZE];
70       ushort depth16[TILE_SIZE][TILE_SIZE];
71       ubyte stencil8[TILE_SIZE][TILE_SIZE];
72       uint colorui128[TILE_SIZE][TILE_SIZE][4];
73       int colori128[TILE_SIZE][TILE_SIZE][4];
74       uint64_t depth64[TILE_SIZE][TILE_SIZE];
75       ubyte any[1];
76    } data;
77 };
78 
79 #define NUM_ENTRIES 50
80 
81 
82 struct softpipe_tile_cache
83 {
84    struct pipe_context *pipe;
85    struct pipe_surface *surface;  /**< the surface we're caching */
86    struct pipe_transfer **transfer;
87    void **transfer_map;
88    int num_maps;
89 
90    union tile_address tile_addrs[NUM_ENTRIES];
91    struct softpipe_cached_tile *entries[NUM_ENTRIES];
92    uint *clear_flags;
93    uint clear_flags_size;
94    union pipe_color_union clear_color; /**< for color bufs */
95    uint64_t clear_val;        /**< for z+stencil */
96    boolean depth_stencil; /**< Is the surface a depth/stencil format? */
97 
98    struct softpipe_cached_tile *tile;  /**< scratch tile for clears */
99 
100    union tile_address last_tile_addr;
101    struct softpipe_cached_tile *last_tile;  /**< most recently retrieved tile */
102 };
103 
104 
105 extern struct softpipe_tile_cache *
106 sp_create_tile_cache( struct pipe_context *pipe );
107 
108 extern void
109 sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
110 
111 extern void
112 sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
113                           struct pipe_surface *sps);
114 
115 extern struct pipe_surface *
116 sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
117 
118 extern void
119 sp_flush_tile_cache(struct softpipe_tile_cache *tc);
120 
121 extern void
122 sp_tile_cache_clear(struct softpipe_tile_cache *tc,
123                     const union pipe_color_union *color,
124                     uint64_t clearValue);
125 
126 extern struct softpipe_cached_tile *
127 sp_find_cached_tile(struct softpipe_tile_cache *tc,
128                     union tile_address addr );
129 
130 
131 static inline union tile_address
tile_address(unsigned x,unsigned y,unsigned layer)132 tile_address( unsigned x,
133               unsigned y, unsigned layer )
134 {
135    union tile_address addr;
136 
137    addr.value = 0;
138    addr.bits.x = x / TILE_SIZE;
139    addr.bits.y = y / TILE_SIZE;
140    addr.bits.layer = layer;
141    return addr;
142 }
143 
144 /* Quickly retrieve tile if it matches last lookup.
145  */
146 static inline struct softpipe_cached_tile *
sp_get_cached_tile(struct softpipe_tile_cache * tc,int x,int y,int layer)147 sp_get_cached_tile(struct softpipe_tile_cache *tc,
148                    int x, int y, int layer )
149 {
150    union tile_address addr = tile_address( x, y, layer );
151 
152    if (tc->last_tile_addr.value == addr.value)
153       return tc->last_tile;
154 
155    return sp_find_cached_tile( tc, addr );
156 }
157 
158 
159 
160 
161 #endif /* SP_TILE_CACHE_H */
162 
163