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Gimp/plug-ins/common/exchange.c
Michael Natterer b10adabb5e Added parent window API to the GimpProgress interface and to the libgimp 
2005-09-09  Michael Natterer  <mitch@gimp.org>

	Added parent window API to the GimpProgress interface and to
	the libgimp progress stuff. Might look strange, but does
	the right thing in almost all cases (image window, file dialog,
	script-fu dialog etc). Fixes bug #62988.

	* app/core/gimpprogress.[ch]: added GimpProgress::get_window()
	which should return a toplevel window ID if the progress is in a
	window that wants to be the transient parent of plug-in dialogs.

	* app/widgets/gimpwidgets-utils.[ch] (gimp_window_get_native): new
	function which returns the window handle of a GtkWindow's GdkWindow.

	* app/widgets/gimpfiledialog.c: implement ::get_window().

	* app/display/gimpdisplay.[ch]: ditto. Removed window handle API.

	* app/gui/gui-vtable.c: changed accordingly.

	* libgimpbase/gimpbaseenums.[ch] (enum GimpProgressCommand):
	added GIMP_PROGRESS_COMMAND_GET_WINDOW.

	* app/plug-in/plug-in-progress.[ch] (plug_in_progress_get_window):
	new function. Also renamed some functions to match the
	GimpProgress interface, and not the legacy PDB procedure names.

	* tools/pdbgen/pdb/progress.pdb
	* app/core/gimppdbprogress.c: implement get_window() on both
	sides of the wire, keeping backward compatibility (hopefully).

	* libgimp/gimpprogress.[ch]: deprecated gimp_progress_install()
	and added gimp_progress_install_vtable() which takes a vtable with
	padding to be extensible. Added get_window() vtable entry and
	dispatch it accordingly. Also added pulse() which was implemented
	in a hackish way before. Everything is of course backward
	compatible.

	* libgimp/gimpprogressbar.c: inmplement the get_window() stuff
	so a plug-in dialog containing a progress can be the transient
	parent of another dialog in another plug-in.

	* libgimp/gimpui.[ch] (gimp_ui_get_progress_window): new function
	which returns a foreign GdkWindow of this plug-ins progress
	window.

	Renamed gimp_window_set_transient_for_default_display() to
	gimp_window_set_transient() and make it use the progress' window
	handle instead of the display's (which is the right thing to do in
	almost all cases).

	* libgimp/gimp.def
	* libgimp/gimpui.def: add the new functions.

	* tools/pdbgen/enums.pl
	* app/pdb/internal_procs.c
	* app/pdb/progress_cmds.c
	* libgimp/gimpprogress_pdb.[ch]: regenerated.

	* libgimp/gimpexport.c
	* plug-ins/*/*.c: follow API change.
2005-09-09 18:07:31 +00:00

781 lines
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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
*
* Added ability to select "from" color by clicking on the preview image.
* As a side effect, clicking twice on the same spot reverses the action,
* i.e. you can click once, see the result, and click again to revert.
*
* Also changed update policies for all sliders to delayed. On a slow machine
* the algorithm really chewes up CPU time.
*
* - timecop@japan.co.jp
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-exchange"
#define PLUG_IN_BINARY "exchange"
#define SCALE_WIDTH 128
#define PREVIEW_SIZE 128
/* datastructure to store parameters in */
typedef struct
{
GimpRGB from;
GimpRGB to;
GimpRGB threshold;
gboolean preview;
} myParams;
/* lets prototype */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void exchange (GimpDrawable *drawable,
GimpPreview *preview);
static gboolean exchange_dialog (GimpDrawable *preview);
static void color_button_callback (GtkWidget *widget,
gpointer data);
static void scale_callback (GtkAdjustment *adj,
gpointer data);
/* some global variables */
static myParams xargs =
{
{ 0.0, 0.0, 0.0, 1.0 }, /* from */
{ 0.0, 0.0, 0.0, 1.0 }, /* to */
{ 0.0, 0.0, 0.0, 1.0 }, /* threshold */
TRUE /* preview */
};
static GtkWidget *from_colorbutton;
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, "from-red", "Red value (from)" },
{ GIMP_PDB_INT8, "from-green", "Green value (from)" },
{ GIMP_PDB_INT8, "from-blue", "Blue value (from)" },
{ GIMP_PDB_INT8, "to-red", "Red value (to)" },
{ GIMP_PDB_INT8, "to-green", "Green value (to)" },
{ GIMP_PDB_INT8, "to-blue", "Blue value (to)" },
{ GIMP_PDB_INT8, "red-threshold", "Red threshold" },
{ GIMP_PDB_INT8, "green-threshold", "Green threshold" },
{ GIMP_PDB_INT8, "blue-threshold", "Blue threshold" }
};
gimp_install_procedure (PLUG_IN_PROC,
"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_("_Color Exchange..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Colors/Map");
}
/* main function */
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunMode runmode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpDrawable *drawable;
*nreturn_vals = 1;
*return_vals = values;
INIT_I18N ();
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
runmode = param[0].data.d_int32;
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (runmode)
{
case GIMP_RUN_INTERACTIVE:
/* retrieve stored arguments (if any) */
gimp_get_data (PLUG_IN_PROC, &xargs);
/* initialize using foreground color */
gimp_context_get_foreground (&xargs.from);
if (! exchange_dialog (drawable))
return;
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC, &xargs);
/*
* instead of recalling the last-set values,
* run with the current foreground as 'from'
* color, making ALT-F somewhat more useful.
*/
gimp_context_get_foreground (&xargs.from);
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 12)
{
status = GIMP_PDB_EXECUTION_ERROR;
}
else
{
gimp_rgb_set_uchar (&xargs.from,
param[3].data.d_int8,
param[4].data.d_int8,
param[5].data.d_int8);
gimp_rgb_set_uchar (&xargs.to,
param[6].data.d_int8,
param[7].data.d_int8,
param[8].data.d_int8);
gimp_rgb_set_uchar (&xargs.threshold,
param[9].data.d_int8,
param[10].data.d_int8,
param[11].data.d_int8);
}
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
gimp_progress_init (_("Color Exchange..."));
gimp_tile_cache_ntiles (2 * (drawable->width /
gimp_tile_width () + 1));
exchange (drawable, NULL);
gimp_drawable_detach (drawable);
/* store our settings */
if (runmode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &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;
}
static gboolean
preview_event_handler (GtkWidget *area,
GdkEvent *event,
GtkWidget *preview)
{
gint pos;
guchar *buf;
guint32 drawable_id;
GimpRGB color;
GdkEventButton *button_event = (GdkEventButton *)event;
buf = GIMP_PREVIEW_AREA (area)->buf;
drawable_id = GIMP_DRAWABLE_PREVIEW (preview)->drawable->drawable_id;
switch (event->type)
{
case GDK_BUTTON_PRESS:
if (button_event->button == 2)
{
pos = event->button.x * gimp_drawable_bpp (drawable_id) +
event->button.y * GIMP_PREVIEW_AREA (area)->rowstride;
gimp_rgb_set_uchar (&color, buf[pos], buf[pos + 1], buf[pos + 2]);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (from_colorbutton),
&color);
}
break;
default:
break;
}
return FALSE;
}
/* show our dialog */
static gboolean
exchange_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *preview;
GtkWidget *table;
GtkWidget *threshold;
GtkWidget *colorbutton;
GtkWidget *scale;
GtkSizeGroup *group;
GtkObject *adj;
gint framenumber;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Color Exchange"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
/* do some boxes here */
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
gtk_widget_show (main_vbox);
frame = gimp_frame_new (_("Middle-Click Inside Preview to Pick \"From Color\""));
gtk_box_pack_start_defaults (GTK_BOX (main_vbox), frame);
gtk_widget_show (frame);
preview = gimp_drawable_preview_new (drawable, &xargs.preview);
gtk_container_add (GTK_CONTAINER (frame), preview);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (exchange),
drawable);
g_signal_connect (GIMP_PREVIEW (preview)->area, "event",
G_CALLBACK (preview_event_handler),
preview);
/* a hidden color_button to handle the threshold more easily */
threshold = gimp_color_button_new (NULL, 1, 1,
&xargs.threshold,
GIMP_COLOR_AREA_FLAT);
g_signal_connect (threshold, "color-changed",
G_CALLBACK (gimp_color_button_get_color),
&xargs.threshold);
g_signal_connect (threshold, "color-changed",
G_CALLBACK (color_button_callback),
&xargs.threshold);
g_signal_connect_swapped (threshold, "color-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
/* and our scales */
group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
for (framenumber = 0; framenumber < 2; framenumber++)
{
GtkWidget *image;
gint row = 0;
frame = gimp_frame_new (framenumber ? _("To Color") : _("From Color"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (framenumber ? 4 : 8, 4, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 12);
if (!framenumber)
{
gtk_table_set_row_spacing (GTK_TABLE (table), 2, 6);
gtk_table_set_row_spacing (GTK_TABLE (table), 4, 6);
gtk_table_set_row_spacing (GTK_TABLE (table), 6, 6);
}
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.to : &xargs.from),
GIMP_COLOR_AREA_FLAT);
gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
NULL, 0.0, 0.0,
colorbutton, 1, FALSE);
g_signal_connect (colorbutton, "color-changed",
G_CALLBACK (gimp_color_button_get_color),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect (colorbutton, "color-changed",
G_CALLBACK (color_button_callback),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect_swapped (colorbutton, "color-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
if (!framenumber)
from_colorbutton = colorbutton;
/* Red */
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_RED,
GTK_ICON_SIZE_BUTTON);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.5);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, row, row + 1 + (framenumber ? 0 : 1),
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("_Red:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.r : xargs.from.r,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "red", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.r : &xargs.from.r);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
if (! framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("R_ed threshold:"), SCALE_WIDTH, 0,
xargs.threshold.r,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "red", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.r);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
}
/* Green */
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_GREEN,
GTK_ICON_SIZE_BUTTON);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.5);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, row, row + 1 + (framenumber ? 0 : 1),
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("_Green:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.g : xargs.from.g,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "green", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.g : &xargs.from.g);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
if (!framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("G_reen threshold:"), SCALE_WIDTH, 0,
xargs.threshold.g,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "green", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.g);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
}
/* Blue */
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_BLUE,
GTK_ICON_SIZE_BUTTON);
gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.5);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, row, row + 1 + (framenumber ? 0 : 1),
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("_Blue:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.b : xargs.from.b,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "blue", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.b : &xargs.from.b);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
if (! framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 1, row++,
_("B_lue threshold:"), SCALE_WIDTH, 0,
xargs.threshold.b,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "blue", adj);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.b);
g_signal_connect (adj, "value-changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
}
if (!framenumber)
{
GtkWidget *button;
button = gtk_check_button_new_with_mnemonic (_("Lock _thresholds"));
gtk_table_attach (GTK_TABLE (table), button, 2, 4, row, row + 1,
GTK_FILL, 0, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
lock_threshold);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (gimp_toggle_button_update),
&lock_threshold);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gimp_preview_invalidate),
preview);
}
}
g_object_unref (group);
/* show everything */
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
color_button_callback (GtkWidget *widget,
gpointer data)
{
GtkObject *red_adj;
GtkObject *green_adj;
GtkObject *blue_adj;
GimpRGB *color;
color = (GimpRGB *) data;
red_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "red");
green_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "green");
blue_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "blue");
if (red_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (red_adj), color->r);
if (green_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (green_adj), color->g);
if (blue_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (blue_adj), color->b);
}
static void
scale_callback (GtkAdjustment *adj,
gpointer data)
{
GtkObject *object;
GimpRGB *color;
color = (GimpRGB *) data;
object = g_object_get_data (G_OBJECT (adj), "colorbutton");
if (GIMP_IS_COLOR_BUTTON (object))
{
if (color == &xargs.threshold && lock_threshold == TRUE)
gimp_rgb_set (color, adj->value, adj->value, adj->value);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (object), color);
}
}
/* do the exchanging */
static void
exchange (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
guchar min_red, min_green, min_blue;
guchar max_red, max_green, max_blue;
guchar from_red, from_green, from_blue;
guchar to_red, to_green, to_blue;
guchar *src_row, *dest_row;
gint x, y, bpp = drawable->bpp;
gboolean has_alpha;
gint x1, y1, x2, y2;
gint width, height;
GimpRGB min;
GimpRGB max;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
/* allocate memory */
src_row = g_new (guchar, drawable->width * bpp);
gimp_rgb_get_uchar (&xargs.from, &from_red, &from_green, &from_blue);
gimp_rgb_get_uchar (&xargs.to, &to_red, &to_green, &to_blue);
/* get boundary values */
min = xargs.from;
gimp_rgb_subtract (&min, &xargs.threshold);
gimp_rgb_clamp (&min);
gimp_rgb_get_uchar (&min, &min_red, &min_green, &min_blue);
max = xargs.from;
gimp_rgb_add (&max, &xargs.threshold);
gimp_rgb_clamp (&max);
gimp_rgb_get_uchar (&max, &max_red, &max_green, &max_blue);
dest_row = g_new (guchar, drawable->width * bpp);
gimp_pixel_rgn_init (&srcPR, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable,
x1, y1, width, height, (preview == NULL), TRUE);
for (y = y1; y < y2; y++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, x1, y, width);
for (x = 0; x < width; x++)
{
guchar pixel_red, pixel_green, pixel_blue;
guchar new_red, new_green, new_blue;
guint idx;
/* get current pixel-values */
pixel_red = src_row[x * bpp];
pixel_green = src_row[x * bpp + 1];
pixel_blue = src_row[x * bpp + 2];
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)
{
guchar red_delta, green_delta, blue_delta;
red_delta = pixel_red > from_red ?
pixel_red - from_red : from_red - pixel_red;
green_delta = pixel_green > from_green ?
pixel_green - from_green : from_green - pixel_green;
blue_delta = pixel_blue > from_blue ?
pixel_blue - from_blue : from_blue - pixel_blue;
new_red = CLAMP (to_red + red_delta, 0, 255);
new_green = CLAMP (to_green + green_delta, 0, 255);
new_blue = CLAMP (to_blue + blue_delta, 0, 255);
}
else
{
new_red = pixel_red;
new_green = pixel_green;
new_blue = pixel_blue;
}
/* fill buffer */
dest_row[idx + 0] = new_red;
dest_row[idx + 1] = new_green;
dest_row[idx + 2] = new_blue;
/* copy alpha-channel */
if (has_alpha)
dest_row[idx + 3] = src_row[x * bpp + 3];
}
/* store the dest */
gimp_pixel_rgn_set_row (&destPR, dest_row, x1, y, width);
/* and tell the user what we're doing */
if (!preview && (y % 10) == 0)
gimp_progress_update ((gdouble) y / (gdouble) height);
}
g_free (src_row);
g_free (dest_row);
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
&destPR);
}
else
{
/* update the processed region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
}
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