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gimp/plug-ins/common/diffraction.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Diffraction plug-in --- Generate diffraction patterns
* Copyright (C) 1997 Federico Mena Quintero and David Bleecker
* federico@nuclecu.unam.mx
* bleecker@math.hawaii.edu
*
* 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 <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/***** Magic numbers *****/
#define ITERATIONS 100
#define WEIRD_FACTOR 0.04
#define PREVIEW_WIDTH 64
#define PREVIEW_HEIGHT 64
#define PROGRESS_WIDTH 32
#define PROGRESS_HEIGHT 16
#define SCALE_WIDTH 150
/***** Types *****/
typedef struct
{
gdouble lam_r;
gdouble lam_g;
gdouble lam_b;
gdouble contour_r;
gdouble contour_g;
gdouble contour_b;
gdouble edges_r;
gdouble edges_g;
gdouble edges_b;
gdouble brightness;
gdouble scattering;
gdouble polarization;
} diffraction_vals_t;
typedef struct
{
GtkWidget *preview;
GtkWidget *progress;
guchar preview_row[PREVIEW_WIDTH * 3];
gint run;
} diffraction_interface_t;
/***** Prototypes *****/
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void diffraction (GimpDrawable *drawable);
static void diff_init_luts (void);
static void diff_diffract (gdouble x,
gdouble y,
gdouble *r,
gdouble *g,
gdouble *b);
static double diff_point (gdouble x,
gdouble y,
gdouble edges,
gdouble contours,
gdouble lam);
static double diff_intensity (gdouble x,
gdouble y,
gdouble lam);
static gint diffraction_dialog (void);
static void dialog_update_preview (void);
static void dialog_update_callback (GtkWidget *widget,
gpointer data);
static void dialog_ok_callback (GtkWidget *widget,
gpointer data);
/***** Variables *****/
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init */
NULL, /* quit */
query, /* query */
run /* run */
};
static diffraction_vals_t dvals =
{
0.815, /* lam_r */
1.221, /* lam_g */
1.123, /* lam_b */
0.821, /* contour_r */
0.821, /* contour_g */
0.974, /* contour_b */
0.610, /* edges_r */
0.677, /* edges_g */
0.636, /* edges_b */
0.066, /* brightness */
37.126, /* scattering */
-0.473 /* polarization */
};
static diffraction_interface_t dint =
{
NULL, /* preview */
NULL, /* progress */
{ 0 }, /* preview_row */
FALSE /* run */
};
static gdouble cos_lut[ITERATIONS + 1];
static gdouble param_lut1[ITERATIONS + 1];
static gdouble param_lut2[ITERATIONS + 1];
/***** Functions *****/
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_FLOAT, "lam_r", "Light frequency (red)" },
{ GIMP_PDB_FLOAT, "lam_g", "Light frequency (green)" },
{ GIMP_PDB_FLOAT, "lam_b", "Light frequency (blue)" },
{ GIMP_PDB_FLOAT, "contour_r", "Number of contours (red)" },
{ GIMP_PDB_FLOAT, "contour_g", "Number of contours (green)" },
{ GIMP_PDB_FLOAT, "contour_b", "Number of contours (blue)" },
{ GIMP_PDB_FLOAT, "edges_r", "Number of sharp edges (red)" },
{ GIMP_PDB_FLOAT, "edges_g", "Number of sharp edges (green)" },
{ GIMP_PDB_FLOAT, "edges_b", "Number of sharp edges (blue)" },
{ GIMP_PDB_FLOAT, "brightness", "Brightness and shifting/fattening of contours" },
{ GIMP_PDB_FLOAT, "scattering", "Scattering (Speed vs. quality)" },
{ GIMP_PDB_FLOAT, "polarization", "Polarization" }
};
static gint nargs = sizeof (args) / sizeof (args[0]);
gimp_install_procedure ("plug_in_diffraction",
"Generate diffraction patterns",
"Help? What help? Real men do not need help :-)", /* FIXME */
"Federico Mena Quintero",
"Federico Mena Quintero & David Bleecker",
"April 1997, 0.5",
N_("<Image>/Filters/Render/Pattern/Diffraction Patterns..."),
"RGB*",
GIMP_PLUGIN,
nargs, 0,
args, NULL);
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *active_drawable;
GimpRunModeType run_mode;
GimpPDBStatusType status;
/* Initialize */
diff_init_luts ();
status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
INIT_I18N_UI();
/* Possibly retrieve data */
gimp_get_data ("plug_in_diffraction", &dvals);
/* Get information from the dialog */
if (!diffraction_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
INIT_I18N();
/* Make sure all the arguments are present */
if (nparams != 15)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
dvals.lam_r = param[3].data.d_float;
dvals.lam_g = param[4].data.d_float;
dvals.lam_b = param[5].data.d_float;
dvals.contour_r = param[6].data.d_float;
dvals.contour_g = param[7].data.d_float;
dvals.contour_b = param[8].data.d_float;
dvals.edges_r = param[9].data.d_float;
dvals.edges_g = param[10].data.d_float;
dvals.edges_b = param[11].data.d_float;
dvals.brightness = param[12].data.d_float;
dvals.scattering = param[13].data.d_float;
dvals.polarization = param[14].data.d_float;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
INIT_I18N();
/* Possibly retrieve data */
gimp_get_data ("plug_in_diffraction", &dvals);
break;
default:
break;
}
/* Get the active drawable */
active_drawable = gimp_drawable_get (param[2].data.d_drawable);
/* Create the diffraction pattern */
if ((status == GIMP_PDB_SUCCESS) && gimp_drawable_is_rgb(active_drawable->id))
{
/* Set the tile cache size */
gimp_tile_cache_ntiles ((active_drawable->width + gimp_tile_width() - 1) /
gimp_tile_width());
/* Run! */
diffraction (active_drawable);
/* If run mode is interactive, flush displays */
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data ("plug_in_diffraction",
&dvals, sizeof(diffraction_vals_t));
}
else if (status == GIMP_PDB_SUCCESS)
status = GIMP_PDB_EXECUTION_ERROR;
values[0].data.d_status = status;
gimp_drawable_detach (active_drawable);
}
static void
diffraction (GimpDrawable *drawable)
{
GimpPixelRgn dest_rgn;
gpointer pr;
gint x1, y1, x2, y2;
gint width, height;
gint has_alpha;
gint row, col;
guchar *dest_row;
guchar *dest;
gint progress, max_progress;
double left, right, bottom, top;
double dhoriz, dvert;
double px, py;
double r, g, b;
/* Get the mask bounds and image size */
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
has_alpha = gimp_drawable_has_alpha (drawable->id);
/* Initialize pixel regions */
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, width, height, TRUE, TRUE);
progress = 0;
max_progress = width * height;
gimp_progress_init (_("Creating diffraction pattern..."));
/* Create diffraction pattern */
left = -5.0;
right = 5.0;
bottom = -5.0;
top = 5.0;
dhoriz = (right - left) / (width - 1);
dvert = (bottom - top) / (height - 1);
for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
dest_row = dest_rgn.data;
py = top + dvert * (dest_rgn.y - y1);
for (row = 0; row < dest_rgn.h; row++)
{
dest = dest_row;
px = left + dhoriz * (dest_rgn.x - x1);
for (col = 0; col < dest_rgn.w; col++)
{
diff_diffract (px, py, &r, &g, &b);
*dest++ = 255.0 * r;
*dest++ = 255.0 * g;
*dest++ = 255.0 * b;
if (has_alpha)
*dest++ = 255;
px += dhoriz;
}
/* Update progress */
progress += dest_rgn.w;
gimp_progress_update ((double) progress / max_progress);
py += dvert;
dest_row += dest_rgn.rowstride;
}
}
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, width, height);
}
static void
diff_init_luts (void)
{
int i;
double a;
double sina;
a = -G_PI;
for (i = 0; i <= ITERATIONS; i++)
{
sina = sin (a);
cos_lut[i] = cos (a);
param_lut1[i] = 0.75 * sina;
param_lut2[i] = 0.5 * (4.0 * cos_lut[i] * cos_lut[i] + sina * sina);
a += (2.0 * G_PI / ITERATIONS);
}
}
static void
diff_diffract (double x,
double y,
double *r,
double *g,
double *b)
{
*r = diff_point (x, y, dvals.edges_r, dvals.contour_r, dvals.lam_r);
*g = diff_point (x, y, dvals.edges_g, dvals.contour_g, dvals.lam_g);
*b = diff_point (x, y, dvals.edges_b, dvals.contour_b, dvals.lam_b);
}
static double
diff_point (double x,
double y,
double edges,
double contours,
double lam)
{
return fabs (edges * sin (contours * atan (dvals.brightness *
diff_intensity (x, y, lam))));
}
static double
diff_intensity (double x,
double y,
double lam)
{
int i;
double cxy, sxy;
double param;
double polpi2;
double cospolpi2, sinpolpi2;
cxy = 0.0;
sxy = 0.0;
lam *= 4.0;
for (i = 0; i <= ITERATIONS; i++)
{
param = lam *
(cos_lut[i] * x +
param_lut1[i] * y -
param_lut2[i]);
cxy += cos (param);
sxy += sin (param);
}
cxy *= WEIRD_FACTOR;
sxy *= WEIRD_FACTOR;
polpi2 = dvals.polarization * (G_PI / 2.0);
cospolpi2 = cos (polpi2);
sinpolpi2 = sin (polpi2);
return dvals.scattering * ((cospolpi2 + sinpolpi2) * cxy * cxy +
(cospolpi2 - sinpolpi2) * sxy * sxy);
}
#if 0
static double
diff_intensity (double x,
double y,
double lam)
{
int i;
double cxy, sxy;
double s;
double cosa, sina;
double twocosa, param;
double polpi2;
double cospolpi2, sinpolpi2;
s = dvals.scattering;
cxy = 0.0;
sxy = 0.0;
for (i = 0; i <= ITERATIONS; i++)
{
cosa = cos_lut[i];
sina = sin_lut[i];
twocosa = 2.0 * cosa;
param = 4.0 * lam *
(cosa * x +
0.75 * sina * y -
0.5 * (twocosa * twocosa + sina * sina));
cxy += 0.04 * cos (param);
sxy += 0.04 * sin (param);
}
polpi2 = dvals.polarization * (G_PI / 2.0);
cospolpi2 = cos (polpi2);
sinpolpi2 = sin (polpi2);
return s * ((cospolpi2 + sinpolpi2) * cxy * cxy +
(cospolpi2 - sinpolpi2) * sxy * sxy);
}
#endif
static gint
diffraction_dialog (void)
{
GtkWidget *dialog;
GtkWidget *top_table;
GtkWidget *notebook;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *table;
GtkWidget *label;
GtkWidget *button;
GtkObject *adj;
gimp_ui_init ("diffraction", TRUE);
dialog = gimp_dialog_new (_("Diffraction Patterns"), "diffraction",
gimp_standard_help_func, "filters/diffraction.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), dialog_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);
top_table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width(GTK_CONTAINER (top_table), 6);
gtk_table_set_row_spacings (GTK_TABLE (top_table), 4);
gtk_table_set_col_spacings (GTK_TABLE (top_table), 4);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), top_table,
FALSE, FALSE, 0);
gtk_widget_show (top_table);
/* Preview */
vbox = gtk_vbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (top_table), vbox, 0, 1, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (vbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
dint.preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW(dint.preview), PREVIEW_WIDTH, PREVIEW_HEIGHT);
gtk_container_add (GTK_CONTAINER (frame), dint.preview);
gtk_widget_show (dint.preview);
dint.progress = gtk_progress_bar_new ();
gtk_widget_set_usize (dint.progress, PROGRESS_WIDTH, PROGRESS_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox), dint.progress, TRUE, FALSE, 0);
gtk_widget_show (dint.progress);
button = gtk_button_new_with_label (_("Preview!"));
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (dialog_update_callback),
NULL);
gtk_table_attach (GTK_TABLE (top_table), button, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (button);
/* Notebook */
notebook = gtk_notebook_new ();
gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_TOP);
gtk_table_attach (GTK_TABLE (top_table), notebook, 1, 2, 0, 2,
GTK_EXPAND | GTK_FILL, 0, 0, 0);
gtk_widget_show (notebook);
/* Frequencies tab */
table = gtk_table_new (3, 3, 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_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Red:"), SCALE_WIDTH, 0,
dvals.lam_r, 0.0, 20.0, 0.2, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.lam_r);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Green:"), SCALE_WIDTH, 0,
dvals.lam_g, 0.0, 20.0, 0.2, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.lam_g);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Blue:"), SCALE_WIDTH, 0,
dvals.lam_b, 0.0, 20.0, 0.2, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.lam_b);
label = gtk_label_new (_("Frequencies"));
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), table, label);
/* Contours tab */
table = gtk_table_new (3, 3, 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_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Red:"), SCALE_WIDTH, 0,
dvals.contour_r, 0.0, 10.0, 0.1, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.contour_r);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Green:"), SCALE_WIDTH, 0,
dvals.contour_g, 0.0, 10.0, 0.1, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.contour_g);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Blue:"), SCALE_WIDTH, 0,
dvals.contour_b, 0.0, 10.0, 0.1, 1.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.contour_b);
label = gtk_label_new (_("Contours"));
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), table, label);
/* Sharp edges tab */
table = gtk_table_new (3, 2, 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_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Red:"), SCALE_WIDTH, 0,
dvals.edges_r, 0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.edges_r);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Green:"), SCALE_WIDTH, 0,
dvals.edges_g, 0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.edges_g);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Blue:"), SCALE_WIDTH, 0,
dvals.edges_b, 0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.edges_b);
label = gtk_label_new (_("Sharp edges"));
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), table, label);
/* Other options tab */
table = gtk_table_new (3, 2, 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_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Brightness:"), SCALE_WIDTH, 0,
dvals.brightness, 0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.brightness);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Scattering:"), SCALE_WIDTH, 0,
dvals.scattering, 0.0, 100.0, 1.0, 10.0, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.scattering);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Polatization:"), SCALE_WIDTH, 0,
dvals.polarization, -1.0, 1.0, 0.02, 0.2, 3,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&dvals.polarization);
label = gtk_label_new (_("Other options"));
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), table, label);
/* Done */
gtk_widget_show (dialog);
dialog_update_preview ();
gtk_main ();
gdk_flush ();
return dint.run;
}
static void
dialog_update_preview (void)
{
double left, right, bottom, top;
double px, py;
double dx, dy;
double r, g, b;
int x, y;
guchar *p;
left = -5.0;
right = 5.0;
bottom = -5.0;
top = 5.0;
dx = (right - left) / (PREVIEW_WIDTH - 1);
dy = (bottom - top) / (PREVIEW_HEIGHT - 1);
py = top;
for (y = 0; y < PREVIEW_HEIGHT; y++)
{
px = left;
p = dint.preview_row;
for (x = 0; x < PREVIEW_WIDTH; x++)
{
diff_diffract (px, py, &r, &g, &b);
*p++ = 255.0 * r;
*p++ = 255.0 * g;
*p++ = 255.0 * b;
px += dx;
}
gtk_preview_draw_row (GTK_PREVIEW (dint.preview),
dint.preview_row, 0, y, PREVIEW_WIDTH);
gtk_progress_bar_update (GTK_PROGRESS_BAR (dint.progress),
(double) y / (double) (PREVIEW_HEIGHT - 1));
gtk_widget_draw (dint.progress, NULL);
gdk_flush ();
py += dy;
}
gtk_widget_draw (dint.preview, NULL);
gtk_progress_bar_update (GTK_PROGRESS_BAR (dint.progress), 0.0);
gdk_flush ();
}
static void
dialog_update_callback (GtkWidget *widget,
gpointer data)
{
dialog_update_preview ();
}
static void
dialog_ok_callback (GtkWidget *widget,
gpointer data)
{
dint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
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