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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 SP_TILE_CACHE_H
#define SP_TILE_CACHE_H
#include "pipe/p_compiler.h"
struct softpipe_tile_cache;
/**
* Cache tile size (width and height). This needs to be a power of two.
*/
#define 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 tile_address {
struct {
unsigned x:6; /* 4096 / TILE_SIZE */
unsigned y:6; /* 4096 / TILE_SIZE */
unsigned invalid:1;
unsigned pad:19;
} bits;
unsigned value;
};
struct softpipe_cached_tile
{
union tile_address addr;
union {
float color[TILE_SIZE][TILE_SIZE][4];
uint color32[TILE_SIZE][TILE_SIZE];
uint depth32[TILE_SIZE][TILE_SIZE];
ushort depth16[TILE_SIZE][TILE_SIZE];
ubyte stencil8[TILE_SIZE][TILE_SIZE];
ubyte any[1];
} data;
};
#define NUM_ENTRIES 50
/** XXX move these */
#define MAX_WIDTH 4096
#define MAX_HEIGHT 4096
struct softpipe_tile_cache
{
struct pipe_context *pipe;
struct pipe_surface *surface; /**< the surface we're caching */
struct pipe_transfer *transfer;
void *transfer_map;
struct softpipe_cached_tile entries[NUM_ENTRIES];
uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
float clear_color[4]; /**< for color bufs */
uint clear_val; /**< for z+stencil, or packed color clear value */
boolean depth_stencil; /**< Is the surface a depth/stencil format? */
struct softpipe_cached_tile tile; /**< scratch tile for clears */
struct softpipe_cached_tile *last_tile; /**< most recently retrieved tile */
};
extern struct softpipe_tile_cache *
sp_create_tile_cache( struct pipe_context *pipe );
extern void
sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
extern void
sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
struct pipe_surface *sps);
extern struct pipe_surface *
sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
extern void
sp_tile_cache_map_transfers(struct softpipe_tile_cache *tc);
extern void
sp_tile_cache_unmap_transfers(struct softpipe_tile_cache *tc);
extern void
sp_flush_tile_cache(struct softpipe_tile_cache *tc);
extern void
sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float *rgba,
uint clearValue);
extern struct softpipe_cached_tile *
sp_find_cached_tile(struct softpipe_tile_cache *tc,
union tile_address addr );
static INLINE union tile_address
tile_address( unsigned x,
unsigned y )
{
union tile_address addr;
addr.value = 0;
addr.bits.x = x / TILE_SIZE;
addr.bits.y = y / TILE_SIZE;
return addr;
}
/* Quickly retrieve tile if it matches last lookup.
*/
static INLINE struct softpipe_cached_tile *
sp_get_cached_tile(struct softpipe_tile_cache *tc,
int x, int y )
{
union tile_address addr = tile_address( x, y );
if (tc->last_tile->addr.value == addr.value)
return tc->last_tile;
return sp_find_cached_tile( tc, addr );
}
#endif /* SP_TILE_CACHE_H */
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