/**************************************************************************
*
* 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.
*
**************************************************************************/
/**
* Texture tile caching.
*
* Author:
* Brian Paul
*/
#include "util/u_inlines.h"
#include "util/u_memory.h"
#include "util/u_tile.h"
#include "util/u_format.h"
#include "util/u_math.h"
#include "sp_context.h"
#include "sp_texture.h"
#include "sp_tex_tile_cache.h"
struct softpipe_tex_tile_cache *
sp_create_tex_tile_cache( struct pipe_context *pipe )
{
struct softpipe_tex_tile_cache *tc;
uint pos;
/* make sure max texture size works */
assert((TILE_SIZE << TEX_ADDR_BITS) >= (1 << (SP_MAX_TEXTURE_2D_LEVELS-1)));
tc = CALLOC_STRUCT( softpipe_tex_tile_cache );
if (tc) {
tc->pipe = pipe;
for (pos = 0; pos < NUM_ENTRIES; pos++) {
tc->entries[pos].addr.bits.invalid = 1;
}
tc->last_tile = &tc->entries[0]; /* any tile */
}
return tc;
}
void
sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
{
if (tc) {
uint pos;
for (pos = 0; pos < NUM_ENTRIES; pos++) {
/*assert(tc->entries[pos].x < 0);*/
}
if (tc->transfer) {
tc->pipe->transfer_destroy(tc->pipe, tc->transfer);
}
if (tc->tex_trans) {
tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
}
FREE( tc );
}
}
void
sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc)
{
if (tc->tex_trans && !tc->tex_trans_map)
tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
}
void
sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc)
{
if (tc->tex_trans_map) {
tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
tc->tex_trans_map = NULL;
}
}
/**
* Invalidate all cached tiles for the cached texture.
* Should be called when the texture is modified.
*/
void
sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc)
{
unsigned i;
assert(tc);
assert(tc->texture);
for (i = 0; i < NUM_ENTRIES; i++) {
tc->entries[i].addr.bits.invalid = 1;
}
}
static boolean
sp_tex_tile_is_compat_view(struct softpipe_tex_tile_cache *tc,
struct pipe_sampler_view *view)
{
if (!view)
return FALSE;
return (tc->texture == view->texture &&
tc->format == view->format &&
tc->swizzle_r == view->swizzle_r &&
tc->swizzle_g == view->swizzle_g &&
tc->swizzle_b == view->swizzle_b &&
tc->swizzle_a == view->swizzle_a);
}
/**
* Specify the sampler view to cache.
*/
void
sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
struct pipe_sampler_view *view)
{
struct pipe_resource *texture = view ? view->texture : NULL;
uint i;
assert(!tc->transfer);
if (!sp_tex_tile_is_compat_view(tc, view)) {
pipe_resource_reference(&tc->texture, texture);
if (tc->tex_trans) {
if (tc->tex_trans_map) {
tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
tc->tex_trans_map = NULL;
}
tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
tc->tex_trans = NULL;
}
if (view) {
tc->swizzle_r = view->swizzle_r;
tc->swizzle_g = view->swizzle_g;
tc->swizzle_b = view->swizzle_b;
tc->swizzle_a = view->swizzle_a;
tc->format = view->format;
}
/* mark as entries as invalid/empty */
/* XXX we should try to avoid this when the teximage hasn't changed */
for (i = 0; i < NUM_ENTRIES; i++) {
tc->entries[i].addr.bits.invalid = 1;
}
tc->tex_face = -1; /* any invalid value here */
}
}
/**
* Flush the tile cache: write all dirty tiles back to the transfer.
* any tiles "flagged" as cleared will be "really" cleared.
*/
void
sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
{
int pos;
if (tc->texture) {
/* caching a texture, mark all entries as empty */
for (pos = 0; pos < NUM_ENTRIES; pos++) {
tc->entries[pos].addr.bits.invalid = 1;
}
tc->tex_face = -1;
}
}
/**
* Given the texture face, level, zslice, x and y values, compute
* the cache entry position/index where we'd hope to find the
* cached texture tile.
* This is basically a direct-map cache.
* XXX There's probably lots of ways in which we can improve this.
*/
static INLINE uint
tex_cache_pos( union tex_tile_address addr )
{
uint entry = (addr.bits.x +
addr.bits.y * 9 +
addr.bits.z * 3 +
addr.bits.face +
addr.bits.level * 7);
return entry % NUM_ENTRIES;
}
/**
* Similar to sp_get_cached_tile() but for textures.
* Tiles are read-only and indexed with more params.
*/
const struct softpipe_tex_cached_tile *
sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
union tex_tile_address addr )
{
struct softpipe_tex_cached_tile *tile;
boolean zs = util_format_is_depth_or_stencil(tc->format);
tile = tc->entries + tex_cache_pos( addr );
if (addr.value != tile->addr.value) {
/* cache miss. Most misses are because we've invaldiated the
* texture cache previously -- most commonly on binding a new
* texture. Currently we effectively flush the cache on texture
* bind.
*/
#if 0
_debug_printf("miss at %u: x=%d y=%d z=%d face=%d level=%d\n"
" tile %u: x=%d y=%d z=%d face=%d level=%d\n",
pos, x/TILE_SIZE, y/TILE_SIZE, z, face, level,
pos, tile->addr.bits.x, tile->addr.bits.y, tile->z, tile->face, tile->level);
#endif
/* check if we need to get a new transfer */
if (!tc->tex_trans ||
tc->tex_face != addr.bits.face ||
tc->tex_level != addr.bits.level ||
tc->tex_z != addr.bits.z) {
/* get new transfer (view into texture) */
unsigned width, height, layer;
if (tc->tex_trans) {
if (tc->tex_trans_map) {
tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
tc->tex_trans_map = NULL;
}
tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
tc->tex_trans = NULL;
}
width = u_minify(tc->texture->width0, addr.bits.level);
if (tc->texture->target == PIPE_TEXTURE_1D_ARRAY) {
height = tc->texture->array_size;
layer = 0;
}
else {
height = u_minify(tc->texture->height0, addr.bits.level);
layer = addr.bits.face + addr.bits.z;
}
tc->tex_trans =
pipe_get_transfer(tc->pipe, tc->texture,
addr.bits.level,
layer,
PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED,
0, 0, width, height);
tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
tc->tex_face = addr.bits.face;
tc->tex_level = addr.bits.level;
tc->tex_z = addr.bits.z;
}
/* Get tile from the transfer (view into texture), explicitly passing
* the image format.
*/
if (!zs && util_format_is_pure_uint(tc->format)) {
pipe_get_tile_ui_format(tc->pipe,
tc->tex_trans,
addr.bits.x * TILE_SIZE,
addr.bits.y * TILE_SIZE,
TILE_SIZE,
TILE_SIZE,
tc->format,
(unsigned *) tile->data.colorui);
} else if (!zs && util_format_is_pure_sint(tc->format)) {
pipe_get_tile_i_format(tc->pipe,
tc->tex_trans,
addr.bits.x * TILE_SIZE,
addr.bits.y * TILE_SIZE,
TILE_SIZE,
TILE_SIZE,
tc->format,
(int *) tile->data.colori);
} else {
pipe_get_tile_rgba_format(tc->pipe,
tc->tex_trans,
addr.bits.x * TILE_SIZE,
addr.bits.y * TILE_SIZE,
TILE_SIZE,
TILE_SIZE,
tc->format,
(float *) tile->data.color);
}
tile->addr = addr;
}
tc->last_tile = tile;
return tile;
}