2007-10-19 10:08:24 -06:00
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/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* Framebuffer/surface tile caching.
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*
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* Author:
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* Brian Paul
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*/
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#include "sp_context.h"
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#include "sp_surface.h"
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#include "sp_tile_cache.h"
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2007-10-23 18:49:19 -06:00
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#define CLEAR_OPTIMIZATION 0
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2007-10-19 10:08:24 -06:00
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#define NUM_ENTRIES 20
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/** XXX move these */
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#define MAX_WIDTH 2048
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#define MAX_HEIGHT 2048
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struct softpipe_tile_cache
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{
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2007-10-20 15:18:02 -06:00
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struct softpipe_surface *surface; /**< the surface we're caching */
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2007-10-21 18:06:35 -06:00
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struct pipe_mipmap_tree *texture; /**< if caching a texture */
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2007-10-19 10:08:24 -06:00
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struct softpipe_cached_tile entries[NUM_ENTRIES];
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uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
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2007-10-23 18:49:19 -06:00
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float clear_value[4];
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2007-10-19 10:08:24 -06:00
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};
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/**
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* Return the position in the cache for the tile that contains win pos (x,y).
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* We currently use a direct mapped cache so this is like a hack key.
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* At some point we should investige something more sophisticated, like
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* a LRU replacement policy.
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*/
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#define CACHE_POS(x, y) \
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(((x) / TILE_SIZE + ((y) / TILE_SIZE) * 5) % NUM_ENTRIES)
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static uint
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is_clear_flag_set(const uint *bitvec, int x, int y)
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{
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int pos, bit;
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x /= TILE_SIZE;
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y /= TILE_SIZE;
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pos = y * (MAX_WIDTH / TILE_SIZE) + x;
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2007-10-23 18:49:19 -06:00
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assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
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2007-10-19 10:08:24 -06:00
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bit = bitvec[pos / 32] & (1 << (pos & 31));
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return bit;
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}
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static void
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clear_clear_flag(uint *bitvec, int x, int y)
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{
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int pos;
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x /= TILE_SIZE;
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y /= TILE_SIZE;
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pos = y * (MAX_WIDTH / TILE_SIZE) + x;
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2007-10-23 18:49:19 -06:00
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assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
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2007-10-19 10:08:24 -06:00
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bitvec[pos / 32] &= ~(1 << (pos & 31));
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}
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struct softpipe_tile_cache *
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sp_create_tile_cache(void)
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{
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struct softpipe_tile_cache *tc;
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uint pos;
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tc = calloc(1, sizeof(*tc));
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if (tc) {
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for (pos = 0; pos < NUM_ENTRIES; pos++) {
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tc->entries[pos].x =
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tc->entries[pos].y = -1;
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}
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}
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return tc;
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}
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void
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sp_destroy_tile_cache(struct softpipe_tile_cache *tc)
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{
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uint pos;
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for (pos = 0; pos < NUM_ENTRIES; pos++) {
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assert(tc->entries[pos].x < 0);
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}
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free(tc);
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}
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2007-10-20 15:18:02 -06:00
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void
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sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
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struct softpipe_surface *sps)
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{
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tc->surface = sps;
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}
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2007-10-23 18:49:19 -06:00
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struct softpipe_surface *
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sp_tile_cache_get_surface(struct softpipe_tile_cache *tc)
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{
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return tc->surface;
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}
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2007-10-21 18:06:35 -06:00
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void
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sp_tile_cache_set_texture(struct softpipe_tile_cache *tc,
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struct pipe_mipmap_tree *texture)
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{
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2007-10-22 09:37:26 -06:00
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uint i;
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2007-10-21 18:06:35 -06:00
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tc->texture = texture;
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2007-10-22 09:37:26 -06:00
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/* mark as entries as invalid/empty */
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/* XXX we should try to avoid this when the teximage hasn't changed */
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for (i = 0; i < NUM_ENTRIES; i++) {
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tc->entries[i].x = -1;
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}
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2007-10-21 18:06:35 -06:00
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}
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2007-10-20 15:18:02 -06:00
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2007-10-19 10:08:24 -06:00
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void
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2007-10-25 18:50:15 -06:00
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sp_flush_tile_cache(struct softpipe_context *softpipe,
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struct softpipe_tile_cache *tc)
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2007-10-19 10:08:24 -06:00
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{
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2007-10-25 18:50:15 -06:00
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struct pipe_context *pipe = &softpipe->pipe;
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2007-10-20 15:18:02 -06:00
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struct pipe_surface *ps = &tc->surface->surface;
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boolean is_depth_stencil;
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2007-10-19 10:08:24 -06:00
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int inuse = 0, pos;
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2007-10-20 15:18:02 -06:00
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if (!ps || !ps->region || !ps->region->map)
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return;
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is_depth_stencil = (ps->format == PIPE_FORMAT_S8_Z24 ||
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ps->format == PIPE_FORMAT_U_Z16 ||
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ps->format == PIPE_FORMAT_U_Z32 ||
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ps->format == PIPE_FORMAT_U_S8);
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2007-10-19 10:08:24 -06:00
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for (pos = 0; pos < NUM_ENTRIES; pos++) {
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struct softpipe_cached_tile *tile = tc->entries + pos;
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if (tile->x >= 0) {
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2007-10-20 15:18:02 -06:00
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if (is_depth_stencil) {
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2007-10-25 18:50:15 -06:00
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pipe->put_tile(pipe, ps,
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tile->x, tile->y, TILE_SIZE, TILE_SIZE,
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tile->data.depth32, 0/*STRIDE*/);
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2007-10-20 15:18:02 -06:00
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}
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else {
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2007-10-25 18:50:15 -06:00
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pipe->put_tile_rgba(pipe, ps,
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tile->x, tile->y, TILE_SIZE, TILE_SIZE,
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(float *) tile->data.color);
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2007-10-20 15:18:02 -06:00
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}
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2007-10-19 10:08:24 -06:00
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tile->x = tile->y = -1; /* mark as empty */
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inuse++;
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}
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}
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2007-10-23 18:49:19 -06:00
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2007-10-20 15:18:02 -06:00
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/*
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printf("flushed tiles in use: %d\n", inuse);
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*/
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2007-10-19 10:08:24 -06:00
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}
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struct softpipe_cached_tile *
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2007-10-25 18:50:15 -06:00
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sp_get_cached_tile(struct softpipe_context *softpipe,
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struct softpipe_tile_cache *tc, int x, int y)
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2007-10-19 10:08:24 -06:00
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{
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2007-10-25 18:50:15 -06:00
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struct pipe_context *pipe = &softpipe->pipe;
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2007-10-20 15:18:02 -06:00
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struct pipe_surface *ps = &tc->surface->surface;
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boolean is_depth_stencil
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= (ps->format == PIPE_FORMAT_S8_Z24 ||
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ps->format == PIPE_FORMAT_U_Z16 ||
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ps->format == PIPE_FORMAT_U_Z32 ||
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ps->format == PIPE_FORMAT_U_S8);
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2007-10-19 10:08:24 -06:00
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/* tile pos in framebuffer: */
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const int tile_x = x & ~(TILE_SIZE - 1);
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const int tile_y = y & ~(TILE_SIZE - 1);
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/* cache pos/entry: */
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const int pos = CACHE_POS(x, y);
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struct softpipe_cached_tile *tile = tc->entries + pos;
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if (tile_x != tile->x ||
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tile_y != tile->y) {
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if (tile->x != -1) {
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/* put dirty tile back in framebuffer */
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2007-10-20 15:18:02 -06:00
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if (is_depth_stencil) {
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2007-10-25 18:50:15 -06:00
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pipe->put_tile(pipe, ps,
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tile->x, tile->y, TILE_SIZE, TILE_SIZE,
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tile->data.depth32, 0 /*STRIDE*/);
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2007-10-20 15:18:02 -06:00
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}
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else {
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2007-10-25 18:50:15 -06:00
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pipe->put_tile_rgba(pipe, ps,
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tile->x, tile->y, TILE_SIZE, TILE_SIZE,
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(float *) tile->data.color);
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2007-10-20 15:18:02 -06:00
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}
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2007-10-19 10:08:24 -06:00
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}
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2007-10-23 18:49:19 -06:00
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if (is_clear_flag_set(tc->clear_flags, x, y)) {
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2007-10-20 15:18:02 -06:00
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/* don't get tile from framebuffer, just clear it */
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2007-10-19 10:08:24 -06:00
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uint i, j;
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2007-10-23 18:49:19 -06:00
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/* XXX these loops could be optimized */
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switch (ps->format) {
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case PIPE_FORMAT_U_Z16:
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{
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ushort clear_val = (ushort) (tc->clear_value[0] * 0xffff);
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for (i = 0; i < TILE_SIZE; i++) {
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for (j = 0; j < TILE_SIZE; j++) {
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tile->data.depth16[i][j] = clear_val;
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}
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}
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}
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break;
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case PIPE_FORMAT_U_Z32:
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{
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uint clear_val = (uint) (tc->clear_value[0] * 0xffffffff);
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for (i = 0; i < TILE_SIZE; i++) {
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for (j = 0; j < TILE_SIZE; j++) {
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tile->data.depth32[i][j] = clear_val;
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}
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}
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}
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break;
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case PIPE_FORMAT_S8_Z24:
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{
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uint clear_val = (uint) (tc->clear_value[0] * 0xffffff);
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clear_val |= ((uint) tc->clear_value[1]) << 24;
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for (i = 0; i < TILE_SIZE; i++) {
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for (j = 0; j < TILE_SIZE; j++) {
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tile->data.depth32[i][j] = clear_val;
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}
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}
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}
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break;
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case PIPE_FORMAT_U_S8:
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{
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ubyte clear_val = (uint) tc->clear_value[0];
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for (i = 0; i < TILE_SIZE; i++) {
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for (j = 0; j < TILE_SIZE; j++) {
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tile->data.stencil8[i][j] = clear_val;
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}
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}
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}
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break;
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default:
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/* color */
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for (i = 0; i < TILE_SIZE; i++) {
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for (j = 0; j < TILE_SIZE; j++) {
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tile->data.color[i][j][0] = tc->clear_value[0];
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tile->data.color[i][j][1] = tc->clear_value[1];
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tile->data.color[i][j][2] = tc->clear_value[2];
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tile->data.color[i][j][3] = tc->clear_value[3];
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}
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2007-10-19 10:08:24 -06:00
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}
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}
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clear_clear_flag(tc->clear_flags, x, y);
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}
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else {
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/* get new tile from framebuffer */
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2007-10-20 15:18:02 -06:00
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if (is_depth_stencil) {
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2007-10-25 18:50:15 -06:00
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pipe->get_tile(pipe, ps,
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tile_x, tile_y, TILE_SIZE, TILE_SIZE,
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tile->data.depth32, 0/*STRIDE*/);
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2007-10-20 15:18:02 -06:00
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}
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else {
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2007-10-25 18:50:15 -06:00
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pipe->get_tile_rgba(pipe, ps,
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tile_x, tile_y, TILE_SIZE, TILE_SIZE,
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(float *) tile->data.color);
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2007-10-20 15:18:02 -06:00
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}
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2007-10-19 10:08:24 -06:00
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}
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tile->x = tile_x;
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tile->y = tile_y;
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}
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return tile;
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}
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2007-10-21 18:06:35 -06:00
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/**
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* Given the texture face, level, zslice, x and y values, compute
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* the cache entry position/index where we'd hope to find the
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* cached texture tile.
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* This is basically a direct-map cache.
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* XXX There's probably lots of ways in which we can improve this.
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*/
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2007-10-22 09:37:26 -06:00
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static INLINE uint
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2007-10-21 18:06:35 -06:00
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tex_cache_pos(int x, int y, int z, int face, int level)
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{
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2007-10-22 09:37:26 -06:00
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uint entry = x + y * 5 + z * 4 + face + level;
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2007-10-21 18:06:35 -06:00
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return entry % NUM_ENTRIES;
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}
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/**
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* Similar to sp_get_cached_tile() but for textures.
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* Tiles are read-only and indexed with more params.
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*/
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2007-10-22 09:37:26 -06:00
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const struct softpipe_cached_tile *
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sp_get_cached_tile_tex(struct pipe_context *pipe,
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struct softpipe_tile_cache *tc, int x, int y, int z,
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2007-10-21 18:06:35 -06:00
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int face, int level)
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{
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/* tile pos in framebuffer: */
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const int tile_x = x & ~(TILE_SIZE - 1);
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const int tile_y = y & ~(TILE_SIZE - 1);
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/* cache pos/entry: */
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2007-10-22 09:37:26 -06:00
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const uint pos = tex_cache_pos(x / TILE_SIZE, y / TILE_SIZE, z,
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face, level);
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2007-10-21 18:06:35 -06:00
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struct softpipe_cached_tile *tile = tc->entries + pos;
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if (tile_x != tile->x ||
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tile_y != tile->y ||
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z != tile->z ||
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face != tile->face ||
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level != tile->level) {
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2007-10-22 09:37:26 -06:00
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/* XXX this call is a bit heavier than we'd like: */
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2007-10-21 18:06:35 -06:00
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struct pipe_surface *ps
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= pipe->get_tex_surface(pipe, tc->texture, face, level, z);
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2007-10-25 18:50:15 -06:00
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pipe->get_tile_rgba(pipe, ps,
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tile_x, tile_y, TILE_SIZE, TILE_SIZE,
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(float *) tile->data.color);
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2007-10-21 18:06:35 -06:00
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pipe_surface_reference(&ps, NULL);
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2007-10-22 09:37:26 -06:00
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tile->x = tile_x;
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tile->y = tile_y;
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tile->z = z;
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tile->face = face;
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tile->level = level;
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2007-10-21 18:06:35 -06:00
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}
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return tile;
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}
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|
2007-10-23 18:49:19 -06:00
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/**
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* When a whole surface is being cleared to a value we can avoid
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* fetching tiles above.
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* Save the color and set a 'clearflag' for each tile of the screen.
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*/
|
2007-10-19 10:08:24 -06:00
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|
|
void
|
2007-10-23 18:49:19 -06:00
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|
sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float value[4])
|
2007-10-19 10:08:24 -06:00
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|
|
{
|
2007-10-23 18:49:19 -06:00
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|
tc->clear_value[0] = value[0];
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tc->clear_value[1] = value[1];
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|
tc->clear_value[2] = value[2];
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|
|
tc->clear_value[3] = value[3];
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|
|
|
#if CLEAR_OPTIMIZATION
|
2007-10-20 15:18:02 -06:00
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|
memset(tc->clear_flags, 255, sizeof(tc->clear_flags));
|
2007-10-23 18:49:19 -06:00
|
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|
#else
|
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|
|
memset(tc->clear_flags, 0, sizeof(tc->clear_flags));
|
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|
|
#endif
|
2007-10-19 10:08:24 -06:00
|
|
|
}
|