graphics/gimp
graphics/gimp
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/gimp synced 2024-10-23 04:51:44 +00:00
Code Issues Packages Projects Releases Wiki Activity
gimp/plug-ins/common/sparkle.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

1154 lines
37 KiB
C
Raw Blame History

/* Sparkle --- image filter plug-in for The Gimp image manipulation program
* Copyright (C) 1996 by John Beale; ported to Gimp by Michael J. Hammel;
*
* It has been optimized a little, bugfixed and modified by Martin Weber
* for additional functionality. Also bugfixed by Seth Burgess (9/17/03)
* to take rowstrides into account when selections are present (bug #50911).
* Attempted reformatting.
*
* 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.
*
* You can contact Michael at mjhammel@csn.net
* You can contact Martin at martweb@gmx.net
* You can contact Seth at sjburges@gimp.org
*/
/*
* Sparkle 1.27 - simulate pixel bloom and diffraction effects
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-sparkle"
#define PLUG_IN_BINARY "sparkle"
#define SCALE_WIDTH 175
#define ENTRY_WIDTH 7
#define MAX_CHANNELS 4
#define PSV 2 /* point spread value */
#define EPSILON 0.001
#define NATURAL 0
#define FOREGROUND 1
#define BACKGROUND 2
typedef struct
{
gdouble lum_threshold;
gdouble flare_inten;
gdouble spike_len;
gdouble spike_pts;
gdouble spike_angle;
gdouble density;
gdouble opacity;
gdouble random_hue;
gdouble random_saturation;
gboolean preserve_luminosity;
gboolean inverse;
gboolean border;
gint colortype;
gboolean update_preview;
} SparkleVals;
/* Declare local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gboolean sparkle_dialog (GimpDrawable *drawable);
static gint compute_luminosity (const guchar *pixel,
gboolean gray,
gboolean has_alpha);
static gint compute_lum_threshold (GimpDrawable *drawable,
gdouble percentile);
static void sparkle (GimpDrawable *drawable,
GimpPreview *preview);
static void fspike (GimpPixelRgn *src_rgn,
GimpPixelRgn *dest_rgn,
gint x1,
gint y1,
gint x2,
gint y2,
gint xr,
gint yr,
gint tile_width,
gint tile_height,
gdouble inten,
gdouble length,
gdouble angle,
GRand *gr,
guchar *dest_buf);
static GimpTile * rpnt (GimpDrawable *drawable,
GimpTile *tile,
gint x1,
gint y1,
gint x2,
gint y2,
gdouble xr,
gdouble yr,
gint tile_width,
gint tile_height,
gint *row,
gint *col,
gint bytes,
gdouble inten,
guchar color[MAX_CHANNELS],
guchar *dest_buf);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static SparkleVals svals =
{
0.001, /* luminosity threshold */
0.5, /* flare intensity */
20.0, /* spike length */
4.0, /* spike points */
15.0, /* spike angle */
1.0, /* spike density */
0.0, /* opacity */
0.0, /* random hue */
0.0, /* random saturation */
FALSE, /* preserve_luminosity */
FALSE, /* inverse */
FALSE, /* border */
NATURAL, /* colortype */
FALSE /* update_preview */
};
static gint num_sparkles;
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_FLOAT, "lum-threshold", "Luminosity threshold (0.0 - 1.0)" },
{ GIMP_PDB_FLOAT, "flare-inten", "Flare intensity (0.0 - 1.0)" },
{ GIMP_PDB_INT32, "spike-len", "Spike length (in pixels)" },
{ GIMP_PDB_INT32, "spike-pts", "# of spike points" },
{ GIMP_PDB_INT32, "spike-angle", "Spike angle (0-360 degrees, -1: random)" },
{ GIMP_PDB_FLOAT, "density", "Spike density (0.0 - 1.0)" },
{ GIMP_PDB_FLOAT, "opacity", "Opacity (0.0 - 1.0)" },
{ GIMP_PDB_FLOAT, "random-hue", "Random hue (0.0 - 1.0)" },
{ GIMP_PDB_FLOAT, "random-saturation", "Random saturation (0.0 - 1.0)" },
{ GIMP_PDB_INT32, "preserve-luminosity", "Preserve luminosity (TRUE/FALSE)" },
{ GIMP_PDB_INT32, "inverse", "Inverse (TRUE/FALSE)" },
{ GIMP_PDB_INT32, "border", "Add border (TRUE/FALSE)" },
{ GIMP_PDB_INT32, "color-type", "Color of sparkles: { NATURAL (0), FOREGROUND (1), BACKGROUND (2) }" }
};
gimp_install_procedure (PLUG_IN_PROC,
"Simulates pixel bloom and diffraction effects",
"Uses a percentage based luminoisty threhsold to find "
"candidate pixels for adding some sparkles (spikes). ",
"John Beale, & (ported to GIMP v0.54) Michael "
"J. Hammel & ted to GIMP v1.0) & Seth Burgess & "
"Spencer Kimball",
"John Beale",
"Version 1.27, September 2003",
N_("_Sparkle..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC,
"<Image>/Filters/Light and Shadow/Light");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint x, y, w, h;
run_mode = param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
if (! gimp_drawable_mask_intersect (drawable->drawable_id, &x, &y, &w, &h))
{
g_message (_("Region selected for filter is empty"));
return;
}
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &svals);
/* First acquire information with a dialog */
if (! sparkle_dialog (drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 16)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
svals.lum_threshold = param[3].data.d_float;
svals.flare_inten = param[4].data.d_float;
svals.spike_len = param[5].data.d_int32;
svals.spike_pts = param[6].data.d_int32;
svals.spike_angle = param[7].data.d_int32;
svals.density = param[8].data.d_float;
svals.opacity = param[9].data.d_float;
svals.random_hue = param[10].data.d_float;
svals.random_saturation = param[11].data.d_float;
svals.preserve_luminosity = (param[12].data.d_int32) ? TRUE : FALSE;
svals.inverse = (param[13].data.d_int32) ? TRUE : FALSE;
svals.border = (param[14].data.d_int32) ? TRUE : FALSE;
svals.colortype = param[15].data.d_int32;
if (svals.lum_threshold < 0.0 || svals.lum_threshold > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.flare_inten < 0.0 || svals.flare_inten > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.spike_len < 0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.spike_pts < 0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.spike_angle < -1 || svals.spike_angle > 360)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.density < 0.0 || svals.density > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.opacity < 0.0 || svals.opacity > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.random_hue < 0.0 || svals.random_hue > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.random_saturation < 0.0 ||
svals.random_saturation > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (svals.colortype < NATURAL || svals.colortype > BACKGROUND)
status = GIMP_PDB_CALLING_ERROR;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &svals);
break;
default:
break;
}
/* Make sure that the drawable is gray or RGB color */
if (gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id))
{
gimp_progress_init (_("Sparkling..."));
sparkle (drawable, NULL);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store mvals data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &svals, sizeof (SparkleVals));
}
else
{
/* gimp_message ("sparkle: cannot operate on indexed color images"); */
status = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gboolean
sparkle_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *toggle;
GtkWidget *r1, *r2, *r3;
GtkObject *scale_data;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Sparkle"), 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));
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);
preview = gimp_drawable_preview_new (drawable, &svals.update_preview);
gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (sparkle),
drawable);
table = gtk_table_new (9, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Luminosity _threshold:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.lum_threshold, 0.0, 0.1, 0.001, 0.01, 3,
TRUE, 0, 0,
_("Adjust the Luminosity Threshold"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.lum_threshold);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("F_lare intensity:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.flare_inten, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0, 0,
_("Adjust the Flare Intensity"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.flare_inten);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("_Spike length:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.spike_len, 1, 100, 1, 10, 0,
TRUE, 0, 0,
_("Adjust the Spike Length"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.spike_len);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("Sp_ike points:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.spike_pts, 0, 16, 1, 4, 0,
TRUE, 0, 0,
_("Adjust the Number of Spikes"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.spike_pts);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("Spi_ke angle (-1: random):"), SCALE_WIDTH, ENTRY_WIDTH,
svals.spike_angle, -1, 360, 1, 15, 0,
TRUE, 0, 0,
_("Adjust the Spike Angle "
"(-1 means a Random Angle is chosen)"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.spike_angle);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 5,
_("Spik_e density:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.density, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0, 0,
_("Adjust the Spike Density"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.density);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 6,
_("Op_acity:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.opacity, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0, 0,
_("Adjust the Opacity of the Spikes"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.opacity);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 7,
_("_Random hue:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.random_hue, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0, 0,
_("Adjust the Value how much the Hue should "
"be changed randomly"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.random_hue);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
scale_data =
gimp_scale_entry_new (GTK_TABLE (table), 0, 8,
_("Rando_m saturation:"), SCALE_WIDTH, ENTRY_WIDTH,
svals.random_saturation, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0, 0,
_("Adjust the Value how much the Saturation should "
"be changed randomly"), NULL);
g_signal_connect (scale_data, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&svals.random_saturation);
g_signal_connect_swapped (scale_data, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
hbox = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
vbox = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
toggle = gtk_check_button_new_with_mnemonic (_("_Preserve luminosity"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
svals.preserve_luminosity);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("Should the Luminosity be preserved?"), NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&svals.preserve_luminosity);
g_signal_connect_swapped (toggle, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
toggle = gtk_check_button_new_with_mnemonic (_("In_verse"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), svals.inverse);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("Should an Inverse Effect be done?"), NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&svals.inverse);
g_signal_connect_swapped (toggle, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
toggle = gtk_check_button_new_with_mnemonic (_("A_dd border"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), svals.border);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("Draw a Border of Spikes around the Image"), NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&svals.border);
g_signal_connect_swapped (toggle, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
/* colortype */
vbox = gimp_int_radio_group_new (FALSE, NULL,
G_CALLBACK (gimp_radio_button_update),
&svals.colortype, svals.colortype,
_("_Natural color"), NATURAL, &r1,
_("_Foreground color"), FOREGROUND, &r2,
_("_Background color"), BACKGROUND, &r3,
NULL);
gtk_box_pack_start (GTK_BOX (hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
gimp_help_set_help_data (r1, _("Use the color of the image"), NULL);
gimp_help_set_help_data (r2, _("Use the foreground color"), NULL);
gimp_help_set_help_data (r3, _("Use the background color"), NULL);
g_signal_connect_swapped (r1, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect_swapped (r2, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect_swapped (r3, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static gint
compute_luminosity (const guchar *pixel,
gboolean gray,
gboolean has_alpha)
{
gint pixel0, pixel1, pixel2;
if (svals.inverse)
{
pixel0 = 255 - pixel[0];
pixel1 = 255 - pixel[1];
pixel2 = 255 - pixel[2];
}
else
{
pixel0 = pixel[0];
pixel1 = pixel[1];
pixel2 = pixel[2];
}
if (gray)
{
if (has_alpha)
return (pixel0 * pixel1) / 255;
else
return (pixel0);
}
else
{
gint min, max;
min = MIN (pixel0, pixel1);
min = MIN (min, pixel2);
max = MAX (pixel0, pixel1);
max = MAX (max, pixel2);
if (has_alpha)
return ((min + max) * pixel[3]) / 510;
else
return (min + max) / 2;
}
}
static gint
compute_lum_threshold (GimpDrawable *drawable,
gdouble percentile)
{
GimpPixelRgn src_rgn;
gpointer pr;
gint values[256];
gint total, sum;
gboolean gray;
gboolean has_alpha;
gint i;
gint x1, y1, x2, y2;
/* zero out the luminosity values array */
memset (values, 0, sizeof (gint) * 256);
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
gray = gimp_drawable_is_gray (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &src_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src, *s;
gint sx, sy;
src = src_rgn.data;
for (sy = 0; sy < src_rgn.h; sy++)
{
s = src;
for (sx = 0; sx < src_rgn.w; sx++)
{
values [compute_luminosity (s, gray, has_alpha)]++;
s += src_rgn.bpp;
}
src += src_rgn.rowstride;
}
}
total = (x2 - x1) * (y2 - y1);
sum = 0;
for (i = 255; i >= 0; i--)
{
sum += values[i];
if ((gdouble) sum > percentile * (gdouble) total)
{
num_sparkles = sum;
return i;
}
}
return 0;
}
static void
sparkle (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn, dest_rgn;
gdouble nfrac, length, inten, spike_angle;
gint cur_progress, max_progress;
gint x1, y1, x2, y2;
gint width, height;
gint threshold;
gint lum, x, y, b;
gboolean gray, has_alpha;
gint alpha;
gint bytes;
gpointer pr;
gint tile_width, tile_height;
GRand *gr;
guchar *dest_buf = NULL;
gr = g_rand_new ();
bytes = drawable->bpp;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
dest_buf = g_new0 (guchar, width * height * bytes);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
}
if (svals.border)
{
num_sparkles = 2 * (width + height);
threshold = 255;
}
else
{
/* compute the luminosity which exceeds the luminosity threshold */
threshold = compute_lum_threshold (drawable, svals.lum_threshold);
}
gray = gimp_drawable_is_gray (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
alpha = (has_alpha) ? drawable->bpp - 1 : drawable->bpp;
tile_width = gimp_tile_width();
tile_height = gimp_tile_height();
/* initialize the progress dialog */
cur_progress = 0;
max_progress = num_sparkles;
/* copy what is already there */
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, preview == NULL, TRUE);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src, *s;
guchar *dest, *d;
src = src_rgn.data;
if (preview)
dest = dest_buf + (((dest_rgn.y - y1) * width) + (dest_rgn.x - x1)) * bytes;
else
dest = dest_rgn.data;
for (y = 0; y < src_rgn.h; y++)
{
s = src;
d = dest;
for (x = 0; x < src_rgn.w; x++)
{
if (has_alpha && s[alpha] == 0)
{
memset (d, 0, alpha);
}
else
{
for (b = 0; b < alpha; b++)
d[b] = s[b];
}
if (has_alpha)
d[alpha] = s[alpha];
s += src_rgn.bpp;
d += dest_rgn.bpp;
}
src += src_rgn.rowstride;
if (preview)
dest += width * bytes;
else
dest += dest_rgn.rowstride;
}
}
/* add effects to new image based on intensity of old pixels */
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, preview == NULL, TRUE);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src, *s;
src = src_rgn.data;
for (y = 0; y < src_rgn.h; y++)
{
s = src;
for (x = 0; x < src_rgn.w; x++)
{
if (svals.border)
{
if (x + src_rgn.x == 0 ||
y + src_rgn.y == 0 ||
x + src_rgn.x == drawable->width - 1 ||
y + src_rgn.y == drawable->height - 1)
{
lum = 255;
}
else
{
lum = 0;
}
}
else
{
lum = compute_luminosity (s, gray, has_alpha);
}
if (lum >= threshold)
{
nfrac = fabs ((gdouble) (lum + 1 - threshold) /
(gdouble) (256 - threshold));
length = ((gdouble) svals.spike_len *
(gdouble) pow (nfrac, 0.8));
inten = svals.flare_inten * nfrac;
/* fspike im x,y intens rlength angle */
if (svals.spike_pts > 0)
{
/* major spikes */
if (svals.spike_angle == -1)
spike_angle = g_rand_double_range (gr, 0, 360.0);
else
spike_angle = svals.spike_angle;
if (g_rand_double (gr) <= svals.density)
{
fspike (&src_rgn, &dest_rgn, x1, y1, x2, y2,
x + src_rgn.x, y + src_rgn.y,
tile_width, tile_height,
inten, length, spike_angle, gr, dest_buf);
/* minor spikes */
fspike (&src_rgn, &dest_rgn, x1, y1, x2, y2,
x + src_rgn.x, y + src_rgn.y,
tile_width, tile_height,
inten * 0.7, length * 0.7,
((gdouble)spike_angle+180.0/svals.spike_pts),
gr, dest_buf);
}
}
if (!preview)
{
cur_progress ++;
if ((cur_progress % 5) == 0)
gimp_progress_update ((double) cur_progress /
(double) max_progress);
}
}
s += src_rgn.bpp;
}
src += src_rgn.rowstride;
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, dest_buf, width * bytes);
g_free (dest_buf);
}
else
{
gimp_progress_update (1.0);
/* update the sparkled region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
}
g_rand_free (gr);
}
static inline GimpTile *
rpnt (GimpDrawable *drawable,
GimpTile *tile,
gint x1,
gint y1,
gint x2,
gint y2,
gdouble xr,
gdouble yr,
gint tile_width,
gint tile_height,
gint *row,
gint *col,
gint bytes,
gdouble inten,
guchar color[MAX_CHANNELS],
guchar *dest_buf)
{
gint x, y, b;
gdouble dx, dy, rs, val;
guchar *pixel;
gdouble new;
gint newcol, newrow;
gint newcoloff, newrowoff;
x = (int) (xr); /* integer coord. to upper left of real point */
y = (int) (yr);
if (x >= x1 && y >= y1 && x < x2 && y < y2)
{
if (dest_buf)
pixel = dest_buf + ((y - y1) * (x2 - x1) + (x - x1)) * bytes;
else
{
newcol = x / tile_width;
newcoloff = x % tile_width;
newrow = y / tile_height;
newrowoff = y % tile_height;
if ((newcol != *col) || (newrow != *row))
{
*col = newcol;
*row = newrow;
if (tile)
gimp_tile_unref (tile, TRUE);
tile = gimp_drawable_get_tile (drawable, TRUE, *row, *col);
gimp_tile_ref (tile);
}
pixel = tile->data + tile->bpp * (tile->ewidth * newrowoff + newcoloff);
}
dx = xr - x; dy = yr - y;
rs = dx * dx + dy * dy;
val = inten * exp (-rs / PSV);
for (b = 0; b < bytes; b++)
{
if (svals.inverse)
new = 255 - pixel[b];
else
new = pixel[b];
if (svals.preserve_luminosity)
{
if (new < color[b])
{
new *= (1.0 - val * (1.0 - svals.opacity));
}
else
{
new -= val * color[b] * (1.0 - svals.opacity);
if (new < 0.0)
new = 0.0;
}
}
new *= 1.0 - val * svals.opacity;
new += val * color[b];
if (new > 255)
new = 255;
if (svals.inverse)
pixel[b] = 255 - new;
else
pixel[b] = new;
}
}
return tile;
}
static void
fspike (GimpPixelRgn *src_rgn,
GimpPixelRgn *dest_rgn,
gint x1,
gint y1,
gint x2,
gint y2,
gint xr,
gint yr,
gint tile_width,
gint tile_height,
gdouble inten,
gdouble length,
gdouble angle,
GRand *gr,
guchar *dest_buf)
{
const gdouble efac = 2.0;
gdouble xrt, yrt, dx, dy;
gdouble rpos;
gdouble in;
gdouble theta;
gdouble sfac;
gint r, g, b;
GimpTile *tile = NULL;
gint row, col;
gint i;
gint bytes;
gboolean ok;
GimpRGB gimp_color;
guchar pixel[MAX_CHANNELS];
guchar chosen_color[MAX_CHANNELS];
guchar color[MAX_CHANNELS];
theta = angle;
bytes = dest_rgn->bpp;
row = -1;
col = -1;
switch (svals.colortype)
{
case NATURAL:
break;
case FOREGROUND:
gimp_context_get_foreground (&gimp_color);
gimp_rgb_get_uchar (&gimp_color, &chosen_color[0], &chosen_color[1],
&chosen_color[2]);
break;
case BACKGROUND:
gimp_context_get_background (&gimp_color);
gimp_rgb_get_uchar (&gimp_color, &chosen_color[0], &chosen_color[1],
&chosen_color[2]);
break;
}
/* draw the major spikes */
for (i = 0; i < svals.spike_pts; i++)
{
gimp_pixel_rgn_get_pixel (dest_rgn, pixel, xr, yr);
if (svals.colortype == NATURAL)
{
color[0] = pixel[0];
color[1] = pixel[1];
color[2] = pixel[2];
}
else
{
color[0] = chosen_color[0];
color[1] = chosen_color[1];
color[2] = chosen_color[2];
}
color[3] = pixel[3];
if (svals.inverse)
{
color[0] = 255 - color[0];
color[1] = 255 - color[1];
color[2] = 255 - color[2];
}
if (svals.random_hue > 0.0 || svals.random_saturation > 0.0)
{
r = 255 - color[0];
g = 255 - color[1];
b = 255 - color[2];
gimp_rgb_to_hsv_int (&r, &g, &b);
r += svals.random_hue * g_rand_double_range (gr, -0.5, 0.5) * 255;
if (r >= 255)
r -= 255;
else if (r < 0)
r += 255;
b += (svals.random_saturation *
g_rand_double_range (gr, -1.0, 1.0)) * 255;
if (b > 255)
b = 255;
gimp_hsv_to_rgb_int (&r, &g, &b);
color[0] = 255 - r;
color[1] = 255 - g;
color[2] = 255 - b;
}
dx = 0.2 * cos (theta * G_PI / 180.0);
dy = 0.2 * sin (theta * G_PI / 180.0);
xrt = (gdouble) xr; /* (gdouble) is needed because some */
yrt = (gdouble) yr; /* compilers optimize too much otherwise */
rpos = 0.2;
do
{
sfac = inten * exp (-pow (rpos / length, efac));
ok = FALSE;
in = 0.2 * sfac;
if (in > 0.01)
ok = TRUE;
tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2,
xrt, yrt, tile_width, tile_height,
&row, &col, bytes, in, color, dest_buf);
tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2,
xrt + 1.0, yrt, tile_width, tile_height,
&row, &col, bytes, in, color, dest_buf);
tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2,
xrt + 1.0, yrt + 1.0, tile_width, tile_height,
&row, &col, bytes, in, color, dest_buf);
tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2,
xrt, yrt + 1.0, tile_width, tile_height,
&row, &col, bytes, in, color, dest_buf);
xrt += dx;
yrt += dy;
rpos += 0.2;
} while (ok);
theta += 360.0 / svals.spike_pts;
}
if (tile)
gimp_tile_unref (tile, TRUE);
}
Reference in a new issue View git blame Copy permalink