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gimp/libgimp/gimpregioniterator.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpregioniterator.c
*
* FIXME: fix the following comment:
* Contains all kinds of miscellaneous routines factored out from different
* plug-ins. They stay here until their API has crystalized a bit and we can
* put them into the file where they belong (Maurits Rijk
* <lpeek.mrijk@consunet.nl> if you want to blame someone for this mess)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <glib.h>
#include "gimp.h"
#include "gimpregioniterator.h"
struct _GimpRgnIterator
{
GimpDrawable *drawable;
gint x1, y1, x2, y2;
};
static void gimp_rgn_iterator_iter_single (GimpRgnIterator *iter,
GimpPixelRgn *srcPR,
GimpRgnFuncSrc func,
gpointer data);
static void gimp_rgn_render_row (guchar *src,
guchar *dest,
gint col,
gint bpp,
GimpRgnFunc2 func,
gpointer data);
static void gimp_rgn_render_region (const GimpPixelRgn *srcPR,
const GimpPixelRgn *destPR,
GimpRgnFunc2 func,
gpointer data);
/**
* gimp_rgn_iterator_new:
* @drawable: a #GimpDrawable
* @unused: ignored
*
* Creates a new #GimpRgnIterator for @drawable. The #GimpRunMode
* parameter is ignored.
*
* Return value: a newly allocated #GimpRgnIterator.
**/
GimpRgnIterator *
gimp_rgn_iterator_new (GimpDrawable *drawable,
GimpRunMode unused)
{
GimpRgnIterator *iter = g_new (GimpRgnIterator, 1);
iter->drawable = drawable;
gimp_drawable_mask_bounds (drawable->drawable_id,
&iter->x1, &iter->y1,
&iter->x2, &iter->y2);
return iter;
}
/**
* gimp_rgn_iterator_free:
* @iter: a #GimpRgnIterator
*
* Frees the resources allocated for @iter.
**/
void
gimp_rgn_iterator_free (GimpRgnIterator *iter)
{
g_free (iter);
}
void
gimp_rgn_iterator_src (GimpRgnIterator *iter,
GimpRgnFuncSrc func,
gpointer data)
{
GimpPixelRgn srcPR;
gimp_pixel_rgn_init (&srcPR, iter->drawable,
iter->x1, iter->y1,
iter->x2 - iter->x1, iter->y2 - iter->y1,
FALSE, FALSE);
gimp_rgn_iterator_iter_single (iter, &srcPR, func, data);
}
void
gimp_rgn_iterator_src_dest (GimpRgnIterator *iter,
GimpRgnFuncSrcDest func,
gpointer data)
{
GimpPixelRgn srcPR, destPR;
gint x1, y1, x2, y2;
gint bpp;
gpointer pr;
gint total_area;
gint area_so_far;
x1 = iter->x1;
y1 = iter->y1;
x2 = iter->x2;
y2 = iter->y2;
total_area = (x2 - x1) * (y2 - y1);
area_so_far = 0;
gimp_pixel_rgn_init (&srcPR, iter->drawable, x1, y1, x2 - x1, y2 - y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, iter->drawable, x1, y1, x2 - x1, y2 - y1,
TRUE, TRUE);
bpp = srcPR.bpp;
for (pr = gimp_pixel_rgns_register (2, &srcPR, &destPR);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
gint y;
guchar* src = srcPR.data;
guchar* dest = destPR.data;
for (y = srcPR.y; y < srcPR.y + srcPR.h; y++)
{
gint x;
guchar *s = src;
guchar *d = dest;
for (x = srcPR.x; x < srcPR.x + srcPR.w; x++)
{
func (x, y, s, d, bpp, data);
s += bpp;
d += bpp;
}
src += srcPR.rowstride;
dest += destPR.rowstride;
}
area_so_far += srcPR.w * srcPR.h;
gimp_progress_update ((gdouble) area_so_far / (gdouble) total_area);
}
gimp_drawable_flush (iter->drawable);
gimp_drawable_merge_shadow (iter->drawable->drawable_id, TRUE);
gimp_drawable_update (iter->drawable->drawable_id,
x1, y1, x2 - x1, y2 - y1);
}
void
gimp_rgn_iterator_dest (GimpRgnIterator *iter,
GimpRgnFuncDest func,
gpointer data)
{
GimpPixelRgn destPR;
gimp_pixel_rgn_init (&destPR, iter->drawable,
iter->x1, iter->y1,
iter->x2 - iter->x1, iter->y2 - iter->y1,
TRUE, TRUE);
gimp_rgn_iterator_iter_single (iter, &destPR, (GimpRgnFuncSrc) func, data);
/* update the processed region */
gimp_drawable_flush (iter->drawable);
gimp_drawable_merge_shadow (iter->drawable->drawable_id, TRUE);
gimp_drawable_update (iter->drawable->drawable_id,
iter->x1, iter->y1,
iter->x2 - iter->x1, iter->y2 - iter->y1);
}
void
gimp_rgn_iterate1 (GimpDrawable *drawable,
GimpRunMode unused,
GimpRgnFunc1 func,
gpointer data)
{
GimpPixelRgn srcPR;
gint x1, y1, x2, y2;
gpointer pr;
gint total_area;
gint area_so_far;
gint progress_skip;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
total_area = (x2 - x1) * (y2 - y1);
if (total_area <= 0)
return;
area_so_far = 0;
progress_skip = 0;
gimp_pixel_rgn_init (&srcPR, drawable,
x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &srcPR);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
guchar *src = srcPR.data;
gint y;
for (y = 0; y < srcPR.h; y++)
{
guchar *s = src;
gint x;
for (x = 0; x < srcPR.w; x++)
{
func (s, srcPR.bpp, data);
s += srcPR.bpp;
}
src += srcPR.rowstride;
}
area_so_far += srcPR.w * srcPR.h;
if (((progress_skip++) % 10) == 0)
gimp_progress_update ((gdouble) area_so_far / (gdouble) total_area);
}
}
void
gimp_rgn_iterate2 (GimpDrawable *drawable,
GimpRunMode unused,
GimpRgnFunc2 func,
gpointer data)
{
GimpPixelRgn srcPR, destPR;
gint x1, y1, x2, y2;
gpointer pr;
gint total_area;
gint area_so_far;
gint progress_skip;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
total_area = (x2 - x1) * (y2 - y1);
if (total_area <= 0)
return;
area_so_far = 0;
progress_skip = 0;
/* Initialize the pixel regions. */
gimp_pixel_rgn_init (&srcPR, drawable, x1, y1, (x2 - x1), (y2 - y1),
FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, x1, y1, (x2 - x1), (y2 - y1),
TRUE, TRUE);
for (pr = gimp_pixel_rgns_register (2, &srcPR, &destPR);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
gimp_rgn_render_region (&srcPR, &destPR, func, data);
area_so_far += srcPR.w * srcPR.h;
if (((progress_skip++) % 10) == 0)
gimp_progress_update ((gdouble) area_so_far / (gdouble) total_area);
}
/* update the processed region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
}
static void
gimp_rgn_iterator_iter_single (GimpRgnIterator *iter,
GimpPixelRgn *srcPR,
GimpRgnFuncSrc func,
gpointer data)
{
gpointer pr;
gint total_area;
gint area_so_far;
total_area = (iter->x2 - iter->x1) * (iter->y2 - iter->y1);
area_so_far = 0;
for (pr = gimp_pixel_rgns_register (1, srcPR);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
guchar *src = srcPR->data;
gint y;
for (y = srcPR->y; y < srcPR->y + srcPR->h; y++)
{
guchar *s = src;
gint x;
for (x = srcPR->x; x < srcPR->x + srcPR->w; x++)
{
func (x, y, s, srcPR->bpp, data);
s += srcPR->bpp;
}
src += srcPR->rowstride;
}
area_so_far += srcPR->w * srcPR->h;
gimp_progress_update ((gdouble) area_so_far / (gdouble) total_area);
}
}
static void
gimp_rgn_render_row (guchar *src,
guchar *dest,
gint col, /* row width in pixels */
gint bpp,
GimpRgnFunc2 func,
gpointer data)
{
while (col--)
{
func (src, dest, bpp, data);
src += bpp;
dest += bpp;
}
}
static void
gimp_rgn_render_region (const GimpPixelRgn *srcPR,
const GimpPixelRgn *destPR,
GimpRgnFunc2 func,
gpointer data)
{
guchar *src = srcPR->data;
guchar *dest = destPR->data;
gint row;
for (row = 0; row < srcPR->h; row++)
{
gimp_rgn_render_row (src, dest, srcPR->w, srcPR->bpp, func, data);
src += srcPR->rowstride;
dest += destPR->rowstride;
}
}
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