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gimp/plug-ins/common/exchange.c

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/*
* This is a plug-in for the GIMP.
*
* 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.
*
*
*/
/*
* Exchange one color with the other (settable threshold to convert from
* one color-shade to another...might do wonders on certain images, or be
* totally useless on others).
*
* Author: robert@experimental.net
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define SCALE_WIDTH 128
#define PREVIEW_SIZE 128
/* datastructure to store parameters in */
typedef struct
{
guchar fromred, fromgreen, fromblue;
guchar tored, togreen, toblue;
guchar red_threshold, green_threshold, blue_threshold;
gint32 image;
gint32 drawable;
} myParams;
/* lets prototype */
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void exchange (void);
static void real_exchange (gint, gint, gint, gint, gboolean);
static int doDialog (void);
static void update_preview (void);
static void ok_callback (GtkWidget *, gpointer);
static void color_button_callback (GtkWidget *, gpointer);
static void scale_callback (GtkAdjustment *, gpointer);
/* some global variables */
static GimpDrawable *drw;
static gboolean has_alpha;
static myParams xargs = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static gint running = 0;
static GimpPixelRgn origregion;
static GtkWidget *preview;
static GtkWidget *from_colorbutton;
static GtkWidget *to_colorbutton;
static gint sel_x1, sel_y1, sel_x2, sel_y2;
static gint prev_width, prev_height, sel_width, sel_height;
static gboolean lock_threshold = FALSE;
/* lets declare what we want to do */
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* run program */
MAIN ()
/* tell GIMP who we are */
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT8, "fromred", "Red value (from)" },
{ GIMP_PDB_INT8, "fromgreen", "Green value (from)" },
{ GIMP_PDB_INT8, "fromblue", "Blue value (from)" },
{ GIMP_PDB_INT8, "tored", "Red value (to)" },
{ GIMP_PDB_INT8, "togreen", "Green value (to)" },
{ GIMP_PDB_INT8, "toblue", "Blue value (to)" },
{ GIMP_PDB_INT8, "red_threshold", "Red threshold" },
{ GIMP_PDB_INT8, "green_threshold", "Green threshold" },
{ GIMP_PDB_INT8, "blue_threshold", "Blue threshold" }
};
static gint nargs = sizeof (args) / sizeof (args[0]);
gimp_install_procedure ("plug_in_exchange",
"Color Exchange",
"Exchange one color with another, optionally setting a threshold "
"to convert from one shade to another",
"robert@experimental.net",
"robert@experimental.net",
"June 17th, 1997",
N_("<Image>/Filters/Colors/Map/Color Exchange..."),
"RGB*",
GIMP_PLUGIN,
nargs, 0,
args, NULL);
}
/* main function */
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunModeType runmode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
runmode = param[0].data.d_int32;
xargs.image = param[1].data.d_image;
xargs.drawable = param[2].data.d_drawable;
drw = gimp_drawable_get (xargs.drawable);
/* initialize misc. things */
gimp_drawable_mask_bounds (drw->id, &sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
if (sel_width > PREVIEW_SIZE)
prev_width = PREVIEW_SIZE;
else
prev_width = sel_width;
if (sel_height > PREVIEW_SIZE)
prev_height = PREVIEW_SIZE;
else
prev_height = sel_height;
has_alpha = gimp_drawable_has_alpha (drw->id);
switch (runmode)
{
case GIMP_RUN_INTERACTIVE:
INIT_I18N_UI();
/* retrieve stored arguments (if any) */
gimp_get_data ("plug_in_exchange", &xargs);
/* initialize using foreground color */
gimp_palette_get_foreground (&xargs.fromred,
&xargs.fromgreen,
&xargs.fromblue);
if (!doDialog ())
return;
break;
case GIMP_RUN_WITH_LAST_VALS:
INIT_I18N();
gimp_get_data ("plug_in_exchange", &xargs);
/*
* instead of recalling the last-set values,
* run with the current foreground as 'from'
* color, making ALT-F somewhat more useful.
*/
gimp_palette_get_foreground (&xargs.fromred,
&xargs.fromgreen,
&xargs.fromblue);
break;
case GIMP_RUN_NONINTERACTIVE:
INIT_I18N();
if (nparams != 12)
{
status = GIMP_PDB_EXECUTION_ERROR;
}
else
{
xargs.fromred = param[3].data.d_int8;
xargs.fromgreen = param[4].data.d_int8;
xargs.fromblue = param[5].data.d_int8;
xargs.tored = param[6].data.d_int8;
xargs.togreen = param[7].data.d_int8;
xargs.toblue = param[8].data.d_int8;
xargs.red_threshold = param[9].data.d_int32;
xargs.green_threshold = param[10].data.d_int32;
xargs.blue_threshold = param[11].data.d_int32;
}
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (gimp_drawable_is_rgb (drw->id))
{
gimp_progress_init (_("Color Exchange..."));
gimp_tile_cache_ntiles (2 * (drw->width / gimp_tile_width () + 1));
exchange ();
gimp_drawable_detach( drw);
/* store our settings */
if (runmode == GIMP_RUN_INTERACTIVE)
gimp_set_data ("plug_in_exchange", &xargs, sizeof (myParams));
/* and flush */
if (runmode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
}
else
status = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
}
/* do the exchanging */
static void
exchange (void)
{
/* do the real exchange */
real_exchange (-1, -1, -1, -1, FALSE);
}
/* show our dialog */
static gint
doDialog (void)
{
GtkWidget *dialog;
GtkWidget *mainbox;
GtkWidget *frame;
GtkWidget *abox;
GtkWidget *pframe;
GtkWidget *table;
GtkWidget *colorbutton;
GtkObject *adj;
GtkObject *red_threshold = NULL;
GtkObject *green_threshold = NULL;
GtkObject *blue_threshold = NULL;
gint framenumber;
gimp_ui_init ("exchange", TRUE);
/* load pixelregion */
gimp_pixel_rgn_init (&origregion, drw,
0, 0, PREVIEW_SIZE, PREVIEW_SIZE, FALSE, FALSE);
/* set up the dialog */
dialog = gimp_dialog_new (_("Color Exchange"), "exchange",
gimp_standard_help_func, "filters/exchange.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dialog), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
/* do some boxes here */
mainbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (mainbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), mainbox,
TRUE, TRUE, 0);
frame = gtk_frame_new (_("Preview"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (mainbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_container_add (GTK_CONTAINER (frame), abox);
gtk_widget_show (abox);
pframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (pframe), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (pframe), 4);
gtk_container_add (GTK_CONTAINER (abox), pframe);
gtk_widget_show (pframe);
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview), prev_width, prev_height);
gtk_container_add (GTK_CONTAINER (pframe), preview);
update_preview ();
gtk_widget_show (preview);
/* and our scales */
for (framenumber = 0; framenumber < 2; framenumber++)
{
guint id;
frame = gtk_frame_new (framenumber ? _("To Color") : _("From Color"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (mainbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (framenumber ? 3 : 9, 4, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_container_set_border_width (GTK_CONTAINER (table), 4);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
colorbutton = gimp_color_button_new (framenumber ?
_("Color Exchange: To Color") :
_("Color Exchange: From Color"),
SCALE_WIDTH / 2, 16,
framenumber ?
&xargs.tored : &xargs.fromred,
3);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
NULL, 0.0, 0.0,
colorbutton, 1, TRUE);
gtk_signal_connect (GTK_OBJECT (colorbutton), "color_changed",
GTK_SIGNAL_FUNC (color_button_callback),
NULL);
if (framenumber)
to_colorbutton = colorbutton;
else
from_colorbutton = colorbutton;
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Red:"), SCALE_WIDTH, 0,
framenumber ? xargs.tored : xargs.fromred,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_object_set_user_data (GTK_OBJECT (adj), colorbutton);
gtk_object_set_data (GTK_OBJECT (colorbutton), "red", adj);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
framenumber ? &xargs.tored : &xargs.fromred);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
if (! framenumber)
{
red_threshold =
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Red Threshold:"), SCALE_WIDTH, 0,
xargs.red_threshold,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
&xargs.red_threshold);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
}
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, framenumber ? 2 : 3,
_("Green:"), SCALE_WIDTH, 0,
framenumber ? xargs.togreen : xargs.fromgreen,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_object_set_user_data (GTK_OBJECT (adj), colorbutton);
gtk_object_set_data (GTK_OBJECT (colorbutton), "green", adj);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
framenumber ? &xargs.togreen : &xargs.fromgreen);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
if (! framenumber)
{
green_threshold =
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("Green Threshold:"), SCALE_WIDTH, 0,
xargs.green_threshold,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_object_set_user_data (GTK_OBJECT (adj), red_threshold);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
&xargs.green_threshold);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
}
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, framenumber ? 3 : 5,
_("Blue:"), SCALE_WIDTH, 0,
framenumber ? xargs.toblue : xargs.fromblue,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_object_set_user_data (GTK_OBJECT (adj), colorbutton);
gtk_object_set_data (GTK_OBJECT (colorbutton), "blue", adj);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
framenumber ? &xargs.toblue : &xargs.fromblue);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
if (! framenumber)
{
blue_threshold =
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 6,
_("Blue Threshold:"), SCALE_WIDTH, 0,
xargs.blue_threshold,
0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_object_set_user_data (GTK_OBJECT (adj), green_threshold);
id = gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scale_callback),
&xargs.blue_threshold);
gtk_object_set_data (GTK_OBJECT (adj), "handler", (gpointer) id);
gtk_object_set_user_data (GTK_OBJECT (red_threshold), blue_threshold);
}
if (! framenumber)
{
GtkWidget *button;
button = gtk_check_button_new_with_label (_("Lock Thresholds"));
gtk_table_attach (GTK_TABLE (table), button, 1, 3, 7, 8,
GTK_FILL, 0, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), lock_threshold);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&lock_threshold);
gtk_widget_show (button);
}
}
/* show everything */
gtk_widget_show (mainbox);
gtk_widget_show (dialog);
gtk_main ();
gdk_flush ();
return running;
}
static void
ok_callback (GtkWidget *widget,
gpointer data)
{
running = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
color_button_callback (GtkWidget *widget,
gpointer data)
{
GtkObject *red_adj;
GtkObject *green_adj;
GtkObject *blue_adj;
guint red_handler;
guint green_handler;
guint blue_handler;
red_adj = (GtkObject *) gtk_object_get_data (GTK_OBJECT (widget), "red");
green_adj = (GtkObject *) gtk_object_get_data (GTK_OBJECT (widget), "green");
blue_adj = (GtkObject *) gtk_object_get_data (GTK_OBJECT (widget), "blue");
red_handler = (guint) gtk_object_get_data (GTK_OBJECT (red_adj),
"handler");
green_handler = (guint) gtk_object_get_data (GTK_OBJECT (green_adj),
"handler");
blue_handler = (guint) gtk_object_get_data (GTK_OBJECT (blue_adj),
"handler");
gtk_signal_handler_block (GTK_OBJECT (red_adj), red_handler);
gtk_signal_handler_block (GTK_OBJECT (green_adj), green_handler);
gtk_signal_handler_block (GTK_OBJECT (blue_adj), blue_handler);
if (widget == from_colorbutton)
{
gtk_adjustment_set_value (GTK_ADJUSTMENT (red_adj), xargs.fromred);
gtk_adjustment_set_value (GTK_ADJUSTMENT (green_adj), xargs.fromgreen);
gtk_adjustment_set_value (GTK_ADJUSTMENT (blue_adj), xargs.fromblue);
}
else
{
gtk_adjustment_set_value (GTK_ADJUSTMENT (red_adj), xargs.tored);
gtk_adjustment_set_value (GTK_ADJUSTMENT (green_adj), xargs.togreen);
gtk_adjustment_set_value (GTK_ADJUSTMENT (blue_adj), xargs.toblue);
}
gtk_signal_handler_unblock (GTK_OBJECT (red_adj), red_handler);
gtk_signal_handler_unblock (GTK_OBJECT (green_adj), green_handler);
gtk_signal_handler_unblock (GTK_OBJECT (blue_adj), blue_handler);
update_preview ();
}
static void
scale_callback (GtkAdjustment *adj,
gpointer data)
{
GtkObject *object;
guchar *val = data;
guint handler;
gint i;
*val = (guchar) adj->value;
object = gtk_object_get_user_data (GTK_OBJECT (adj));
if (GIMP_IS_COLOR_BUTTON (object))
{
gimp_color_button_update (GIMP_COLOR_BUTTON (object));
}
else if (GTK_IS_ADJUSTMENT (object) && lock_threshold == TRUE)
{
for (i = 0; i < 2; i++)
{
handler = (guint) gtk_object_get_data (GTK_OBJECT (object), "handler");
gtk_signal_handler_block (GTK_OBJECT (object), handler);
gtk_adjustment_set_value (GTK_ADJUSTMENT (object), adj->value);
gtk_signal_handler_unblock (GTK_OBJECT (object), handler);
object = gtk_object_get_user_data (GTK_OBJECT (object));
}
xargs.red_threshold = xargs.green_threshold = xargs.blue_threshold = *val;
}
update_preview ();
}
static void
update_preview (void)
{
real_exchange (sel_x1, sel_y1,
sel_x1 + prev_width, sel_y1 + prev_height,
TRUE);
gtk_widget_draw (preview, NULL);
gdk_flush ();
}
static void
real_exchange (gint x1,
gint y1,
gint x2,
gint y2,
gboolean do_preview)
{
GimpPixelRgn srcPR, destPR;
guchar *src_row, *dest_row;
gint x, y, bpp = drw->bpp;
gint width, height;
/* fill if necessary */
if (x1 == -1 || y1 == -1 || x2 == -1 || y2 == -1)
{
x1 = sel_x1;
y1 = sel_y1;
x2 = sel_x2;
y2 = sel_y2;
}
/* check for valid coordinates */
width = x2 - x1;
height = y2 - y1;
/* allocate memory */
src_row = g_new (guchar, drw->width * bpp);
if (do_preview && has_alpha)
dest_row = g_new (guchar, drw->width * (bpp - 1));
else
dest_row = g_new (guchar, drw->width * bpp);
/* initialize the pixel regions */
/*
gimp_pixel_rgn_init (&srcPR, drw, x1, y1, width, height, FALSE, FALSE);
*/
gimp_pixel_rgn_init (&srcPR, drw, 0, 0, drw->width, drw->height, FALSE, FALSE);
if (! do_preview)
gimp_pixel_rgn_init (&destPR, drw, 0, 0, width, height, TRUE, TRUE);
for (y = y1; y < y2; y++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, 0, y, drw->width);
for (x = x1; x < x2; x++)
{
gint pixel_red, pixel_green, pixel_blue;
gint min_red, max_red, min_green, max_green, min_blue, max_blue;
gint new_red, new_green, new_blue;
gint idx, rest;
/* get boundary values */
min_red = MAX (xargs.fromred - xargs.red_threshold, 0);
min_green = MAX (xargs.fromgreen - xargs.green_threshold, 0);
min_blue = MAX (xargs.fromblue - xargs.blue_threshold, 0);
max_red = MIN (xargs.fromred + xargs.red_threshold, 255);
max_green = MIN (xargs.fromgreen + xargs.green_threshold, 255);
max_blue = MIN (xargs.fromblue + xargs.blue_threshold, 255);
/* get current pixel-values */
pixel_red = src_row[x * bpp];
pixel_green = src_row[x * bpp + 1];
pixel_blue = src_row[x * bpp + 2];
/* shift down for preview */
if (do_preview)
{
if (has_alpha)
idx = (x - x1) * (bpp - 1);
else
idx = (x - x1) * bpp;
}
else
idx = x * bpp;
/* want this pixel? */
if (pixel_red >= min_red &&
pixel_red <= max_red &&
pixel_green >= min_green &&
pixel_green <= max_green &&
pixel_blue >= min_blue &&
pixel_blue <= max_blue)
{
gint red_delta, green_delta, blue_delta;
red_delta = pixel_red - xargs.fromred;
green_delta = pixel_green - xargs.fromgreen;
blue_delta = pixel_blue - xargs.fromblue;
new_red = (guchar) CLAMP (xargs.tored + red_delta, 0, 255);
new_green = (guchar) CLAMP (xargs.togreen + green_delta, 0, 255);
new_blue = (guchar) CLAMP (xargs.toblue + blue_delta, 0, 255);
}
else
{
new_red = pixel_red;
new_green = pixel_green;
new_blue = pixel_blue;
}
/* fill buffer (cast it too) */
dest_row[idx + 0] = (guchar) new_red;
dest_row[idx + 1] = (guchar) new_green;
dest_row[idx + 2] = (guchar) new_blue;
/* copy rest (most likely alpha-channel) */
for (rest = 3; rest < bpp; rest++)
dest_row[idx + rest] = src_row[x * bpp + rest];
}
/* store the dest */
if (do_preview)
gtk_preview_draw_row (GTK_PREVIEW (preview), dest_row, 0, y - y1, width);
else
gimp_pixel_rgn_set_row (&destPR, dest_row, 0, y, drw->width);
/* and tell the user what we're doing */
if (! do_preview && (y % 10) == 0)
gimp_progress_update ((double) y / (double) height);
}
g_free(src_row);
g_free(dest_row);
if (! do_preview)
{
/* update the processed region */
gimp_drawable_flush (drw);
gimp_drawable_merge_shadow (drw->id, TRUE);
gimp_drawable_update (drw->id, x1, y1, width, height);
}
}
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