gimp/app/tile_manager.c

495 lines
10 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "tile_cache.h"
#include "tile_manager.h"
#include "tile_swap.h"
#include "tile_manager_pvt.h"
#include "tile_pvt.h" /* ick. */
static int tile_manager_get_tile_num (TileManager *tm,
int xpixel,
int ypixel);
TileManager*
tile_manager_new (int toplevel_width,
int toplevel_height,
int bpp)
{
TileManager *tm;
int width, height;
tm = g_new (TileManager, 1);
tm->user_data = NULL;
tm->validate_proc = NULL;
width = toplevel_width;
height = toplevel_height;
tm->width = width;
tm->height = height;
tm->bpp = bpp;
tm->ntile_rows = (height + TILE_HEIGHT - 1) / TILE_HEIGHT;
tm->ntile_cols = (width + TILE_WIDTH - 1) / TILE_WIDTH;
tm->tiles = NULL;
return tm;
}
void
tile_manager_destroy (TileManager *tm)
{
int ntiles;
int i;
if (tm->tiles)
{
ntiles = tm->ntile_rows * tm->ntile_cols;
for (i = 0; i < ntiles; i++)
{
TILE_MUTEX_LOCK (tm->tiles[i]);
tile_detach (tm->tiles[i], tm, i);
}
g_free (tm->tiles);
}
g_free (tm);
}
void
tile_manager_set_validate_proc (TileManager *tm,
TileValidateProc proc)
{
tm->validate_proc = proc;
}
Tile*
tile_manager_get_tile (TileManager *tm,
int xpixel,
int ypixel,
int wantread,
int wantwrite)
{
int tile_num;
tile_num = tile_manager_get_tile_num (tm, xpixel, ypixel);
if (tile_num < 0)
return NULL;
return tile_manager_get (tm, tile_num, wantread, wantwrite);
}
Tile*
tile_manager_get (TileManager *tm,
int tile_num,
int wantread,
int wantwrite)
{
Tile **tiles;
Tile **tile_ptr;
int ntiles;
int nrows, ncols;
int right_tile;
int bottom_tile;
int i, j, k;
ntiles = tm->ntile_rows * tm->ntile_cols;
if ((tile_num < 0) || (tile_num >= ntiles))
return NULL;
if (!tm->tiles)
{
tm->tiles = g_new (Tile*, ntiles);
tiles = tm->tiles;
nrows = tm->ntile_rows;
ncols = tm->ntile_cols;
right_tile = tm->width - ((ncols - 1) * TILE_WIDTH);
bottom_tile = tm->height - ((nrows - 1) * TILE_HEIGHT);
for (i = 0, k = 0; i < nrows; i++)
{
for (j = 0; j < ncols; j++, k++)
{
tiles[k] = g_new (Tile, 1);
tile_init (tiles[k], tm->bpp);
tile_attach (tiles[k], tm, k);
if (j == (ncols - 1))
tiles[k]->ewidth = right_tile;
if (i == (nrows - 1))
tiles[k]->eheight = bottom_tile;
}
}
}
tile_ptr = &tm->tiles[tile_num];
if (wantread)
{
TILE_MUTEX_LOCK (*tile_ptr);
if (wantwrite)
{
if ((*tile_ptr)->share_count > 1)
{
/* Copy-on-write required */
Tile *newtile = g_new (Tile, 1);
tile_init (newtile, (*tile_ptr)->bpp);
newtile->ewidth = (*tile_ptr)->ewidth;
newtile->eheight = (*tile_ptr)->eheight;
newtile->valid = (*tile_ptr)->valid;
if ((*tile_ptr)->data != NULL)
{
newtile->data = g_new (guchar, tile_size (newtile));
memcpy (newtile->data, (*tile_ptr)->data, tile_size (newtile));
}
tile_detach (*tile_ptr, tm, tile_num);
TILE_MUTEX_LOCK (newtile);
tile_attach (newtile, tm, tile_num);
*tile_ptr = newtile;
}
(*tile_ptr)->write_count++;
(*tile_ptr)->dirty = 1;
}
TILE_MUTEX_UNLOCK (*tile_ptr);
tile_lock (*tile_ptr);
}
return *tile_ptr;
}
void
tile_manager_get_async (TileManager *tm,
int xpixel,
int ypixel)
{
Tile *tile_ptr;
int tile_num;
tile_num = tile_manager_get_tile_num (tm, xpixel, ypixel);
if (tile_num < 0)
return;
tile_ptr = tm->tiles[tile_num];
tile_swap_in_async (tile_ptr);
}
void
tile_manager_validate (TileManager *tm,
Tile *tile)
{
tile->valid = TRUE;
if (tm->validate_proc)
(* tm->validate_proc) (tm, tile);
}
void
tile_manager_invalidate_tiles (TileManager *tm,
Tile *toplevel_tile)
{
double x, y;
int row, col;
int num;
col = toplevel_tile->tlink->tile_num % tm->ntile_cols;
row = toplevel_tile->tlink->tile_num / tm->ntile_cols;
x = (col * TILE_WIDTH + toplevel_tile->ewidth / 2.0) / (double) tm->width;
y = (row * TILE_HEIGHT + toplevel_tile->eheight / 2.0) / (double) tm->height;
if (tm->tiles)
{
col = x * tm->width / TILE_WIDTH;
row = y * tm->height / TILE_HEIGHT;
num = row * tm->ntile_cols + col;
tile_invalidate (&tm->tiles[num], tm, num);
}
}
void
tile_invalidate_tile (Tile **tile_ptr, TileManager *tm,
int xpixel, int ypixel)
{
int tile_num;
tile_num = tile_manager_get_tile_num (tm, xpixel, ypixel);
if (tile_num < 0) return;
tile_invalidate (tile_ptr, tm, tile_num);
}
void
tile_invalidate (Tile **tile_ptr, TileManager *tm, int tile_num)
{
Tile *tile = *tile_ptr;
TILE_MUTEX_LOCK (tile);
if (!tile->valid)
goto leave;
if (tile->share_count > 1)
{
/* This tile is shared. Replace it with a new, invalid tile. */
Tile *newtile = g_new (Tile, 1);
tile_init (newtile, tile->bpp);
newtile->ewidth = tile->ewidth;
newtile->eheight = tile->eheight;
tile_detach (tile, tm, tile_num);
TILE_MUTEX_LOCK (newtile);
tile_attach (newtile, tm, tile_num);
tile = *tile_ptr = newtile;
}
if (tile->listhead)
tile_cache_flush (tile);
tile->valid = FALSE;
if (tile->data)
{
g_free (tile->data);
tile->data = NULL;
}
if (tile->swap_offset != -1)
{
/* If the tile is on disk, then delete its
* presence there.
*/
tile_swap_delete (tile);
}
leave:
TILE_MUTEX_UNLOCK (tile);
}
void
tile_manager_map_tile (TileManager *tm,
int xpixel,
int ypixel,
Tile *srctile)
{
int tile_row;
int tile_col;
int tile_num;
if ((xpixel < 0) || (xpixel >= tm->width) ||
(ypixel < 0) || (ypixel >= tm->height))
{
g_warning ("tile_manager_map_tile: tile co-ord out of range.");
return;
}
tile_row = ypixel / TILE_HEIGHT;
tile_col = xpixel / TILE_WIDTH;
tile_num = tile_row * tm->ntile_cols + tile_col;
tile_manager_map (tm, tile_num, srctile);
}
void
tile_manager_map (TileManager *tm,
int tile_num,
Tile *srctile)
{
Tile **tiles;
Tile **tile_ptr;
int ntiles;
int nrows, ncols;
int right_tile;
int bottom_tile;
int i, j, k;
ntiles = tm->ntile_rows * tm->ntile_cols;
if ((tile_num < 0) || (tile_num >= ntiles))
{
g_warning ("tile_manager_map: tile out of range.");
return;
}
if (!tm->tiles)
{
/* g_warning ("tile_manager_map: empty tile level - init'ing.");*/
tm->tiles = g_new (Tile*, ntiles);
tiles = tm->tiles;
nrows = tm->ntile_rows;
ncols = tm->ntile_cols;
right_tile = tm->width - ((ncols - 1) * TILE_WIDTH);
bottom_tile = tm->height - ((nrows - 1) * TILE_HEIGHT);
for (i = 0, k = 0; i < nrows; i++)
{
for (j = 0; j < ncols; j++, k++)
{
/* printf(",");fflush(stdout);*/
tiles[k] = g_new (Tile, 1);
tile_init (tiles[k], tm->bpp);
tile_attach (tiles[k], tm, k);
if (j == (ncols - 1))
tiles[k]->ewidth = right_tile;
if (i == (nrows - 1))
tiles[k]->eheight = bottom_tile;
}
}
/* g_warning ("tile_manager_map: empty tile level - done.");*/
}
tile_ptr = &tm->tiles[tile_num];
/* printf(")");fflush(stdout);*/
TILE_MUTEX_LOCK (*tile_ptr);
if ((*tile_ptr)->ewidth != srctile->ewidth ||
(*tile_ptr)->eheight != srctile->eheight ||
(*tile_ptr)->bpp != srctile->bpp) {
g_warning ("tile_manager_map: nonconformant map (%p -> %p)",
srctile, *tile_ptr);
}
tile_detach (*tile_ptr, tm, tile_num);
/* printf(">");fflush(stdout);*/
TILE_MUTEX_LOCK (srctile);
/* printf(" [src:%p tm:%p tn:%d] ", srctile, tm, tile_num); fflush(stdout);*/
tile_attach (srctile, tm, tile_num);
*tile_ptr = srctile;
TILE_MUTEX_UNLOCK (srctile);
/* printf("}");fflush(stdout);*/
}
static int
tile_manager_get_tile_num (TileManager *tm,
int xpixel,
int ypixel)
{
int tile_row;
int tile_col;
int tile_num;
if ((xpixel < 0) || (xpixel >= tm->width) ||
(ypixel < 0) || (ypixel >= tm->height))
return -1;
tile_row = ypixel / TILE_HEIGHT;
tile_col = xpixel / TILE_WIDTH;
tile_num = tile_row * tm->ntile_cols + tile_col;
return tile_num;
}
void
tile_manager_set_user_data (TileManager *tm,
void *user_data)
{
tm->user_data = user_data;
}
void *
tile_manager_get_user_data (TileManager *tm)
{
return tm->user_data;
}
int
tile_manager_level_width (TileManager *tm)
{
return tm->width;
}
int
tile_manager_level_height (TileManager *tm)
{
return tm->height;
}
int
tile_manager_level_bpp (TileManager *tm)
{
return tm->bpp;
}
void
tile_manager_get_tile_coordinates (TileManager *tm, Tile *tile, int *x, int *y)
{
TileLink *tl;
for (tl = tile->tlink; tl; tl = tl->next)
{
if (tl->tm == tm) break;
}
if (tl == NULL)
{
g_warning ("tile_manager_get_tile_coordinates: tile not attached to manager");
return;
}
*x = TILE_WIDTH * (tl->tile_num % tm->ntile_cols);
*y = TILE_HEIGHT * (tl->tile_num / tm->ntile_cols);
}
void
tile_manager_map_over_tile (TileManager *tm, Tile *tile, Tile *srctile)
{
TileLink *tl;
for (tl = tile->tlink; tl; tl = tl->next)
{
if (tl->tm == tm) break;
}
if (tl == NULL)
{
g_warning ("tile_manager_map_over_tile: tile not attached to manager");
return;
}
tile_manager_map (tm, tl->tile_num, srctile);
}