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/**************************************************************************
*
* 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.
*
**************************************************************************/
#ifndef LP_TEX_CACHE_H
#define LP_TEX_CACHE_H
#include "pipe/p_compiler.h"
struct llvmpipe_context;
struct llvmpipe_tex_tile_cache;
/**
* Cache tile size (width and height). This needs to be a power of two.
*/
#define TEX_TILE_SIZE 64
/* If we need to support > 4096, just expand this to be a 64 bit
* union, or consider tiling in Z as well.
*/
union tex_tile_address {
struct {
unsigned x:6; /* 4096 / TEX_TILE_SIZE */
unsigned y:6; /* 4096 / TEX_TILE_SIZE */
unsigned z:12; /* 4096 -- z not tiled */
unsigned face:3;
unsigned level:4;
unsigned invalid:1;
} bits;
unsigned value;
};
struct llvmpipe_cached_tex_tile
{
union tex_tile_address addr;
float color[TEX_TILE_SIZE][TEX_TILE_SIZE][4];
};
#define NUM_ENTRIES 50
/** XXX move these */
#define MAX_TEX_WIDTH 2048
#define MAX_TEX_HEIGHT 2048
struct llvmpipe_tex_tile_cache
{
struct pipe_screen *screen;
struct pipe_surface *surface; /**< the surface we're caching */
struct pipe_transfer *transfer;
void *transfer_map;
struct pipe_texture *texture; /**< if caching a texture */
unsigned timestamp;
struct llvmpipe_cached_tex_tile entries[NUM_ENTRIES];
struct pipe_transfer *tex_trans;
void *tex_trans_map;
int tex_face, tex_level, tex_z;
struct llvmpipe_cached_tex_tile *last_tile; /**< most recently retrieved tile */
};
extern struct llvmpipe_tex_tile_cache *
lp_create_tex_tile_cache( struct pipe_screen *screen );
extern void
lp_destroy_tex_tile_cache(struct llvmpipe_tex_tile_cache *tc);
extern void
lp_tex_tile_cache_map_transfers(struct llvmpipe_tex_tile_cache *tc);
extern void
lp_tex_tile_cache_unmap_transfers(struct llvmpipe_tex_tile_cache *tc);
extern void
lp_tex_tile_cache_set_texture(struct llvmpipe_tex_tile_cache *tc,
struct pipe_texture *texture);
void
lp_tex_tile_cache_validate_texture(struct llvmpipe_tex_tile_cache *tc);
extern const struct llvmpipe_cached_tex_tile *
lp_find_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
union tex_tile_address addr );
static INLINE const union tex_tile_address
tex_tile_address( unsigned x,
unsigned y,
unsigned z,
unsigned face,
unsigned level )
{
union tex_tile_address addr;
addr.value = 0;
addr.bits.x = x / TEX_TILE_SIZE;
addr.bits.y = y / TEX_TILE_SIZE;
addr.bits.z = z;
addr.bits.face = face;
addr.bits.level = level;
return addr;
}
/* Quickly retrieve tile if it matches last lookup.
*/
static INLINE const struct llvmpipe_cached_tex_tile *
lp_get_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
union tex_tile_address addr )
{
if (tc->last_tile->addr.value == addr.value)
return tc->last_tile;
return lp_find_cached_tex_tile( tc, addr );
}
#endif /* LP_TEX_CACHE_H */
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