mirror of https://github.com/GNOME/gimp.git
63 lines
1.9 KiB
C
63 lines
1.9 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 __PIXEL_SURROUND_H__
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#define __PIXEL_SURROUND_H__
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/* PixelSurround describes a (read-only)
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* region around a pixel in a tile manager
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*/
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typedef struct _PixelSurround
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{
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Tile *tile;
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TileManager *mgr;
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guchar *buff;
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gint buff_size;
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gint bpp;
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gint w;
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gint h;
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guchar bg[MAX_CHANNELS];
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gint row_stride;
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} PixelSurround;
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void pixel_surround_init (PixelSurround *ps,
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TileManager *tm,
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gint w,
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gint h,
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guchar bg[MAX_CHANNELS]);
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/* return a pointer to a buffer which contains all the surrounding pixels
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* strategy: if we are in the middle of a tile, use the tile storage
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* otherwise just copy into our own malloced buffer and return that
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*/
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guchar * pixel_surround_lock (PixelSurround *ps,
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gint x,
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gint y);
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gint pixel_surround_rowstride (PixelSurround *ps);
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void pixel_surround_release (PixelSurround *ps);
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void pixel_surround_clear (PixelSurround *ps);
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#endif /* __PIXEL_SURROUND_H__ */
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