mirror of https://github.com/GNOME/gimp.git
151 lines
3.3 KiB
C
151 lines
3.3 KiB
C
/* The GIMP -- an image manipulation program
|
|
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
|
|
*
|
|
* 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 "config.h"
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
#include "apptypes.h"
|
|
|
|
#include "core/gimpimage.h"
|
|
|
|
#include "pixel_region.h"
|
|
#include "pixel_surround.h"
|
|
#include "tile_manager.h"
|
|
#include "tile.h"
|
|
|
|
|
|
void
|
|
pixel_surround_init (PixelSurround *ps,
|
|
TileManager *tm,
|
|
gint w,
|
|
gint h,
|
|
guchar bg[MAX_CHANNELS])
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < MAX_CHANNELS; ++i)
|
|
{
|
|
ps->bg[i] = bg[i];
|
|
}
|
|
|
|
ps->tile = NULL;
|
|
ps->mgr = tm;
|
|
ps->bpp = tile_manager_bpp (tm);
|
|
ps->w = w;
|
|
ps->h = h;
|
|
/* make sure buffer is big enough */
|
|
ps->buff_size = w * h * ps->bpp;
|
|
ps->buff = g_malloc (ps->buff_size);
|
|
ps->row_stride = 0;
|
|
}
|
|
|
|
guchar *
|
|
pixel_surround_lock (PixelSurround *ps,
|
|
gint x,
|
|
gint y)
|
|
{
|
|
gint i, j;
|
|
guchar *k;
|
|
guchar *ptr;
|
|
|
|
ps->tile = tile_manager_get_tile (ps->mgr, x, y, TRUE, FALSE);
|
|
|
|
i = x % TILE_WIDTH;
|
|
j = y % TILE_HEIGHT;
|
|
|
|
/* do we have the whole region? */
|
|
if (ps->tile &&
|
|
(i < (tile_ewidth(ps->tile) - ps->w)) &&
|
|
(j < (tile_eheight(ps->tile) - ps->h)))
|
|
{
|
|
ps->row_stride = tile_ewidth (ps->tile) * ps->bpp;
|
|
/* is this really the correct way? */
|
|
return tile_data_pointer (ps->tile, i, j);
|
|
}
|
|
|
|
/* nope, do this the hard way (for now) */
|
|
if (ps->tile)
|
|
{
|
|
tile_release (ps->tile, FALSE);
|
|
ps->tile = 0;
|
|
}
|
|
|
|
/* copy pixels, one by one */
|
|
/* no, this is not the best way, but it's much better than before */
|
|
ptr = ps->buff;
|
|
for (j = y; j < y+ps->h; ++j)
|
|
{
|
|
for (i = x; i < x+ps->w; ++i)
|
|
{
|
|
Tile *tile = tile_manager_get_tile (ps->mgr, i, j, TRUE, FALSE);
|
|
|
|
if (tile)
|
|
{
|
|
guchar *buff = tile_data_pointer (tile,
|
|
i % TILE_WIDTH,
|
|
j % TILE_HEIGHT);
|
|
|
|
for (k = buff; k < buff+ps->bpp; ++k, ++ptr)
|
|
{
|
|
*ptr = *k;
|
|
}
|
|
tile_release (tile, FALSE);
|
|
}
|
|
else
|
|
{
|
|
for (k = ps->bg; k < ps->bg+ps->bpp; ++k, ++ptr)
|
|
{
|
|
*ptr = *k;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ps->row_stride = ps->w * ps->bpp;
|
|
|
|
return ps->buff;
|
|
}
|
|
|
|
gint
|
|
pixel_surround_rowstride (PixelSurround *ps)
|
|
{
|
|
return ps->row_stride;
|
|
}
|
|
|
|
void
|
|
pixel_surround_release (PixelSurround *ps)
|
|
{
|
|
/* always get new tile (for now), so release the old one */
|
|
if (ps->tile)
|
|
{
|
|
tile_release (ps->tile, FALSE);
|
|
ps->tile = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
pixel_surround_clear (PixelSurround *ps)
|
|
{
|
|
if (ps->buff)
|
|
{
|
|
g_free (ps->buff);
|
|
ps->buff = 0;
|
|
ps->buff_size = 0;
|
|
}
|
|
}
|