mirror of https://github.com/GNOME/gimp.git
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __TILE_H__
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#define __TILE_H__
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#define TILE_WIDTH 64
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#define TILE_HEIGHT 64
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/* explicit guchar type rather than enum since gcc chooses an int
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* representation but arrays of TileRowHints are quite space-critical
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* in GIMP.
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*/
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typedef guchar TileRowHint;
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#define TILEROWHINT_UNKNOWN 0
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#define TILEROWHINT_OPAQUE 1
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#define TILEROWHINT_TRANSPARENT 2
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#define TILEROWHINT_MIXED 3
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#define TILEROWHINT_OUTOFRANGE 4
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#define TILEROWHINT_UNDEFINED 5
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#define TILEROWHINT_BROKEN 6
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/* Initializes the fields of a tile to "good" values.
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*/
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void tile_init (Tile *tile,
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gint bpp);
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/*
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* tile_lock locks a tile into memory. This does what tile_ref used
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* to do. It is the responsibility of the tile manager to take care
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* of the copy-on-write semantics. Locks stack; a tile remains locked
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* in memory as long as it's been locked more times than it has been
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* released. tile_release needs to know whether the release was for
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* write access. (This is a hack, and should be handled better.)
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*/
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void tile_lock (Tile *tile);
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void tile_release (Tile *tile,
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gboolean dirty);
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/* Allocate the data for the tile.
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*/
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void tile_alloc (Tile *tile);
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/* Return the size in bytes of the tiles data.
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*/
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gint tile_size (Tile *tile);
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gint tile_ewidth (Tile *tile);
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gint tile_eheight (Tile *tile);
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gint tile_bpp (Tile *tile);
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gboolean tile_is_valid (Tile *tile);
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void tile_mark_valid (Tile *tile);
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TileRowHint tile_get_rowhint (Tile *tile,
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gint yoff);
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void tile_set_rowhint (Tile *tile,
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gint yoff,
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TileRowHint rowhint);
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void tile_sanitize_rowhints (Tile *tile);
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void * tile_data_pointer (Tile *tile,
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gint xoff,
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gint yoff);
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/* tile_attach attaches a tile to a tile manager: this function
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* increments the tile's share count and inserts a tilelink into the
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* tile's link list. tile_detach reverses the process.
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* If a tile's share count is zero after a tile_detach, the tile is
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* discarded.
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*/
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void tile_attach (Tile *tile,
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void *tm,
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gint tile_num);
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void tile_detach (Tile *tile,
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void *tm,
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gint tile_num);
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#endif /* __TILE_H__ */
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