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gimp/app/core/gimpdrawable-bucket-fill.c

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/* 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 "config.h"
#include <glib-object.h>
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/temp-buf.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimp.h"
#include "gimpchannel.h"
#include "gimpcontext.h"
#include "gimpdrawable.h"
#include "gimpdrawable-bucket-fill.h"
#include "gimpimage.h"
#include "gimpimage-contiguous-region.h"
#include "gimpimage-mask.h"
#include "gimppattern.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_drawable_bucket_fill_region (GimpBucketFillMode fill_mode,
PixelRegion *bufPR,
PixelRegion *maskPR,
guchar *col,
TempBuf *pattern,
gint off_x,
gint off_y,
gboolean has_alpha);
static void gimp_drawable_bucket_fill_line_color (guchar *buf,
guchar *mask,
guchar *col,
gboolean has_alpha,
gint bytes,
gint width);
static void gimp_drawable_bucket_fill_line_pattern (guchar *buf,
guchar *mask,
TempBuf *pattern,
gboolean has_alpha,
gint bytes,
gint x,
gint y,
gint width);
/* public functions */
void
gimp_drawable_bucket_fill (GimpDrawable *drawable,
GimpBucketFillMode fill_mode,
gint paint_mode,
gdouble opacity,
gboolean do_seed_fill,
gboolean fill_transparent,
gdouble threshold,
gboolean sample_merged,
gdouble x,
gdouble y)
{
GimpImage *gimage;
GimpRGB color;
GimpPattern *pattern = NULL;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
if (fill_mode == GIMP_FG_BUCKET_FILL)
{
gimp_context_get_foreground (gimp_get_current_context (gimage->gimp),
&color);
}
else if (fill_mode == GIMP_BG_BUCKET_FILL)
{
gimp_context_get_background (gimp_get_current_context (gimage->gimp),
&color);
}
else if (fill_mode == GIMP_PATTERN_BUCKET_FILL)
{
pattern =
gimp_context_get_pattern (gimp_get_current_context (gimage->gimp));
if (! pattern)
{
g_message (_("No patterns available for this operation."));
return;
}
}
else
{
g_warning ("%s: invalid fill_mode passed", G_GNUC_PRETTY_FUNCTION);
return;
}
gimp_drawable_bucket_fill_full (drawable,
fill_mode,
paint_mode, opacity,
do_seed_fill,
fill_transparent,
threshold, sample_merged,
x, y,
&color, pattern);
}
void
gimp_drawable_bucket_fill_full (GimpDrawable *drawable,
GimpBucketFillMode fill_mode,
gint paint_mode,
gdouble opacity,
gboolean do_seed_fill,
gboolean fill_transparent,
gdouble threshold,
gboolean sample_merged,
gdouble x,
gdouble y,
const GimpRGB *color,
GimpPattern *pattern)
{
GimpImage *gimage;
TileManager *buf_tiles;
PixelRegion bufPR, maskPR;
GimpChannel *mask = NULL;
gint bytes;
gboolean has_alpha;
gint x1, y1, x2, y2;
guchar col[MAX_CHANNELS];
TempBuf *pat_buf = NULL;
gboolean new_buf = FALSE;
gboolean selection;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (fill_mode != GIMP_PATTERN_BUCKET_FILL ||
GIMP_IS_PATTERN (pattern));
g_return_if_fail ((fill_mode != GIMP_FG_BUCKET_FILL &&
fill_mode != GIMP_BG_BUCKET_FILL) || color != NULL);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
if (fill_mode == GIMP_FG_BUCKET_FILL ||
fill_mode == GIMP_BG_BUCKET_FILL)
{
guchar tmp_col[MAX_CHANNELS];
gimp_rgb_get_uchar (color, &tmp_col[0], &tmp_col[1], &tmp_col[2]);
gimp_image_transform_color (gimage, drawable, tmp_col, col, GIMP_RGB);
}
else if (fill_mode == GIMP_PATTERN_BUCKET_FILL)
{
/* If the pattern doesn't match the image in terms of color type,
* transform it. (ie pattern is RGB, image is indexed)
*/
if (((pattern->mask->bytes == 3 || pattern->mask->bytes == 4 ) && ! gimp_drawable_is_rgb (drawable)) ||
((pattern->mask->bytes == 1 || pattern->mask->bytes == 2 ) && ! gimp_drawable_is_gray (drawable)))
{
guchar *d1, *d2;
gint size, in_bytes, out_bytes;
if ((pattern->mask->bytes == 2) && gimp_drawable_is_rgb (drawable))
pat_buf = temp_buf_new (pattern->mask->width,
pattern->mask->height,
4, 0, 0, NULL);
else if ((pattern->mask->bytes == 1) && gimp_drawable_is_rgb (drawable))
pat_buf = temp_buf_new (pattern->mask->width,
pattern->mask->height,
3, 0, 0, NULL);
else if ((pattern->mask->bytes == 4) && gimp_drawable_is_gray (drawable))
pat_buf = temp_buf_new (pattern->mask->width,
pattern->mask->height,
2, 0, 0, NULL);
else
pat_buf = temp_buf_new (pattern->mask->width,
pattern->mask->height,
1, 0, 0, NULL);
d1 = temp_buf_data (pattern->mask);
d2 = temp_buf_data (pat_buf);
size = pattern->mask->width * pattern->mask->height;
in_bytes = pattern->mask->bytes;
out_bytes = pat_buf->bytes;
while (size--)
{
gimp_image_transform_color (gimage, drawable, d1, d2,
(in_bytes == 3 ||
in_bytes == 4) ?
GIMP_RGB : GIMP_GRAY);
/* Handle alpha */
if (in_bytes == 4 ||
in_bytes == 2 )
d2[out_bytes - 1] = d1[in_bytes - 1];
d1 += in_bytes;
d2 += out_bytes;
}
new_buf = TRUE;
}
else
{
pat_buf = pattern->mask;
}
}
else
{
g_warning ("%s: invalid fill_mode passed", G_GNUC_PRETTY_FUNCTION);
return;
}
gimp_set_busy (gimage->gimp);
bytes = gimp_drawable_bytes (drawable);
has_alpha = gimp_drawable_has_alpha (drawable);
selection = gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
/* Do a seed bucket fill...To do this, calculate a new
* contiguous region. If there is a selection, calculate the
* intersection of this region with the existing selection.
*/
if (do_seed_fill)
{
mask = gimp_image_contiguous_region_by_seed (gimage, drawable,
sample_merged,
TRUE,
(gint) threshold,
fill_transparent,
(gint) x,
(gint) y);
if (selection)
{
gint off_x = 0;
gint off_y = 0;
if (! sample_merged)
gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
gimp_channel_combine_mask (mask, gimp_image_get_mask (gimage),
GIMP_CHANNEL_OP_INTERSECT,
-off_x, -off_y);
}
gimp_channel_bounds (mask, &x1, &y1, &x2, &y2);
/* make sure we handle the mask correctly if it was sample-merged */
if (sample_merged)
{
GimpItem *item;
gint off_x, off_y;
item = GIMP_ITEM (drawable);
/* Limit the channel bounds to the drawable's extents */
gimp_item_offsets (item, &off_x, &off_y);
x1 = CLAMP (x1, off_x, (off_x + gimp_item_width (item)));
y1 = CLAMP (y1, off_y, (off_y + gimp_item_height (item)));
x2 = CLAMP (x2, off_x, (off_x + gimp_item_width (item)));
y2 = CLAMP (y2, off_y, (off_y + gimp_item_height (item)));
pixel_region_init (&maskPR, gimp_drawable_data (GIMP_DRAWABLE (mask)),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
/* translate mask bounds to drawable coords */
x1 -= off_x;
y1 -= off_y;
x2 -= off_x;
y2 -= off_y;
}
else
{
pixel_region_init (&maskPR, gimp_drawable_data (GIMP_DRAWABLE (mask)),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
}
/* if the gimage doesn't have an alpha channel,
* make sure that the temp buf does. We need the
* alpha channel to fill with the region calculated above
*/
if (! has_alpha)
{
bytes ++;
has_alpha = TRUE;
}
}
else if (fill_mode == GIMP_PATTERN_BUCKET_FILL &&
(pat_buf->bytes == 2 || pat_buf->bytes == 4))
{
/* If pattern being applied has an alpha channel,
* add one to the temp buffer from the image too.
*/
if (! has_alpha)
{
bytes ++;
has_alpha = TRUE;
}
}
buf_tiles = tile_manager_new ((x2 - x1), (y2 - y1), bytes);
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE);
if (mask)
gimp_drawable_bucket_fill_region (fill_mode,
&bufPR, &maskPR,
col, pat_buf,
x1, y1,
has_alpha);
else
gimp_drawable_bucket_fill_region (fill_mode,
&bufPR, NULL,
col, pat_buf,
x1, y1,
has_alpha);
/* Apply it to the image */
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), FALSE);
gimp_image_apply_image (gimage, drawable, &bufPR,
TRUE, _("Bucket Fill"),
opacity, paint_mode,
NULL, x1, y1);
tile_manager_unref (buf_tiles);
/* update the image */
gimp_drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
/* free the mask */
if (mask)
g_object_unref (mask);
if (new_buf)
temp_buf_free (pat_buf);
gimp_unset_busy (gimage->gimp);
}
/* private functions */
static void
gimp_drawable_bucket_fill_region (GimpBucketFillMode fill_mode,
PixelRegion *bufPR,
PixelRegion *maskPR,
guchar *col,
TempBuf *pattern,
gint off_x,
gint off_y,
gboolean has_alpha)
{
guchar *s, *m;
gint y;
void *pr;
for (pr = pixel_regions_register (2, bufPR, maskPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
s = bufPR->data;
if (maskPR)
m = maskPR->data;
else
m = NULL;
for (y = 0; y < bufPR->h; y++)
{
switch (fill_mode)
{
case GIMP_FG_BUCKET_FILL:
case GIMP_BG_BUCKET_FILL:
gimp_drawable_bucket_fill_line_color (s, m,
col,
has_alpha,
bufPR->bytes, bufPR->w);
break;
case GIMP_PATTERN_BUCKET_FILL:
gimp_drawable_bucket_fill_line_pattern (s, m,
pattern,
has_alpha,
bufPR->bytes,
off_x + bufPR->x,
off_y + y + bufPR->y,
bufPR->w);
break;
}
s += bufPR->rowstride;
if (maskPR)
m += maskPR->rowstride;
}
}
}
static void
gimp_drawable_bucket_fill_line_color (guchar *buf,
guchar *mask,
guchar *col,
gboolean has_alpha,
gint bytes,
gint width)
{
gint alpha, b;
alpha = (has_alpha) ? bytes - 1 : bytes;
while (width--)
{
for (b = 0; b < alpha; b++)
buf[b] = col[b];
if (has_alpha)
{
if (mask)
buf[alpha] = *mask++;
else
buf[alpha] = OPAQUE_OPACITY;
}
buf += bytes;
}
}
static void
gimp_drawable_bucket_fill_line_pattern (guchar *buf,
guchar *mask,
TempBuf *pattern,
gboolean has_alpha,
gint bytes,
gint x,
gint y,
gint width)
{
guchar *pat, *p;
gint alpha, b;
gint i;
/* Get a pointer to the appropriate scanline of the pattern buffer */
pat = temp_buf_data (pattern) +
(y % pattern->height) * pattern->width * pattern->bytes;
alpha = (has_alpha) ? bytes - 1 : bytes;
/*
* image data = pattern data for all but alpha
*
* If (image has alpha)
* if (there's a mask)
* image data = mask for alpha;
* else
* image data = opaque for alpha.
*
* if (pattern has alpha)
* multiply existing alpha channel by pattern alpha
* (normalised to (0..1))
*/
for (i = 0; i < width; i++)
{
p = pat + ((i + x) % pattern->width) * pattern->bytes;
for (b = 0; b < alpha; b++)
buf[b] = p[b];
if (has_alpha)
{
if (mask)
buf[alpha] = *mask++;
else
buf[alpha] = OPAQUE_OPACITY;
if (pattern->bytes == 2 || pattern->bytes == 4)
{
buf[alpha] =
(guchar)(buf[alpha] *
(p[alpha]/(gdouble)OPAQUE_OPACITY));
}
}
buf += bytes;
}
}
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