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gimp/plug-ins/common/waves.c

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/**************************************************
* file: waves/waves.c
*
* Copyright (c) 1997 Eric L. Hernes (erich@rrnet.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-waves"
#define PLUG_IN_BINARY "waves"
typedef enum
{
MODE_SMEAR,
MODE_BLACKEN
} BorderType;
typedef struct
{
gdouble amplitude;
gdouble phase;
gdouble wavelength;
BorderType type;
gboolean reflective;
} piArgs;
static piArgs wvals =
{
10.0, /* amplitude */
0.0, /* phase */
10.0, /* wavelength */
MODE_SMEAR, /* type */
FALSE /* reflective */
};
static void query (void);
static void run (const gchar *name,
gint nparam,
const GimpParam *param,
gint *nretvals,
GimpParam **retvals);
static void waves (GimpDrawable *drawable);
static gboolean waves_dialog (GimpDrawable *drawable);
static void waves_preview (GimpDrawable *drawable,
GimpPreview *preview);
static void wave (guchar *src,
guchar *dest,
gint width,
gint height,
gint bpp,
gboolean has_alpha,
gdouble cen_x,
gdouble cen_y,
gdouble amplitude,
gdouble wavelength,
gdouble phase,
gboolean smear,
gboolean reflective,
gboolean verbose);
#define WITHIN(a, b, c) ((((a) <= (b)) && ((b) <= (c))) ? TRUE : FALSE)
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "The Image" },
{ GIMP_PDB_DRAWABLE, "drawable", "The Drawable" },
{ GIMP_PDB_FLOAT, "amplitude", "The Amplitude of the Waves" },
{ GIMP_PDB_FLOAT, "phase", "The Phase of the Waves" },
{ GIMP_PDB_FLOAT, "wavelength", "The Wavelength of the Waves" },
{ GIMP_PDB_INT32, "type", "Type of waves, black/smeared" },
{ GIMP_PDB_INT32, "reflective", "Use Reflection" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Distort the image with waves"),
"none yet",
"Eric L. Hernes, Stephen Norris",
"Stephen Norris",
"1997",
N_("_Waves..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Distorts");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpDrawable *drawable;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
INIT_I18N ();
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (param[0].data.d_int32)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC, &wvals);
if (! waves_dialog (drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 8)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
wvals.amplitude = param[3].data.d_float;
wvals.phase = param[4].data.d_float;
wvals.wavelength = param[5].data.d_float;
wvals.type = param[6].data.d_int32;
wvals.reflective = param[7].data.d_int32;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC, &wvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
waves (drawable);
gimp_set_data (PLUG_IN_PROC, &wvals, sizeof (piArgs));
values[0].data.d_status = status;
}
}
static void
waves (GimpDrawable *drawable)
{
GimpPixelRgn srcPr, dstPr;
guchar *src, *dst;
guint width, height, bpp, has_alpha;
width = drawable->width;
height = drawable->height;
bpp = drawable->bpp;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
src = g_new (guchar, width * height * bpp);
dst = g_new (guchar, width * height * bpp);
gimp_pixel_rgn_init (&srcPr, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dstPr, drawable, 0, 0, width, height, TRUE, TRUE);
gimp_pixel_rgn_get_rect (&srcPr, src, 0, 0, width, height);
wave (src, dst, width, height, bpp, has_alpha,
width / 2.0, height / 2.0,
wvals.amplitude, wvals.wavelength, wvals.phase,
wvals.type == MODE_SMEAR, wvals.reflective, TRUE);
gimp_pixel_rgn_set_rect (&dstPr, dst, 0, 0, width, height);
g_free (src);
g_free (dst);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, 0, 0, width, height);
gimp_displays_flush ();
}
static gboolean
waves_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *smear;
GtkWidget *blacken;
GtkWidget *table;
GtkWidget *preview;
GtkWidget *toggle;
GtkObject *adj;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Waves"), 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_get_content_area (GTK_DIALOG (dialog))),
main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_zoom_preview_new (drawable);
gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (waves_preview),
drawable);
frame = gimp_int_radio_group_new (TRUE, _("Mode"),
G_CALLBACK (gimp_radio_button_update),
&wvals.type, wvals.type,
_("_Smear"), MODE_SMEAR, &smear,
_("_Blacken"), MODE_BLACKEN, &blacken,
NULL);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
g_signal_connect_swapped (smear, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect_swapped (blacken, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
toggle = gtk_check_button_new_with_mnemonic ( _("_Reflective"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), wvals.reflective);
gtk_box_pack_start (GTK_BOX (main_vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&wvals.reflective);
g_signal_connect_swapped (toggle, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
table = gtk_table_new (3, 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);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("_Amplitude:"), 140, 6,
wvals.amplitude, 0.0, 101.0, 1.0, 5.0, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&wvals.amplitude);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("_Phase:"), 140, 6,
wvals.phase, 0.0, 360.0, 2.0, 5.0, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&wvals.phase);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("_Wavelength:"), 140, 6,
wvals.wavelength, 0.1, 50.0, 1.0, 5.0, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&wvals.wavelength);
g_signal_connect_swapped (adj, "value-changed",
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 void
waves_preview (GimpDrawable *drawable,
GimpPreview *preview)
{
guchar *src, *dest;
gint width, height;
gint bpp;
gdouble zoom;
gint xc, yc;
src = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
&width, &height, &bpp);
zoom = gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview));
gimp_preview_transform (preview,
drawable->width / 2.0, drawable->height / 2.0,
&xc, &yc);
dest = g_new (guchar, width * height * bpp);
wave (src, dest, width, height, bpp,
bpp == 2 || bpp == 4,
(gdouble) xc, (gdouble) yc,
wvals.amplitude * width / drawable->width * zoom,
wvals.wavelength * height / drawable->height * zoom,
wvals.phase, wvals.type == MODE_SMEAR, wvals.reflective, FALSE);
gimp_preview_draw_buffer (preview, dest, width * bpp);
g_free (src);
g_free (dest);
}
/* Wave the image. For each pixel in the destination image
* which is inside the selection, we compute the corresponding
* waved location in the source image. We use bilinear
* interpolation to avoid ugly jaggies.
*
* Let's assume that we are operating on a circular area.
* Every point within <radius> distance of the wave center is
* waveed to its destination position.
*
* Basically, introduce a wave into the image. I made up the
* forumla initially, but it looks good. Quartic added the
* wavelength etc. to it while I was asleep :) Just goes to show
* we should work with people in different time zones more.
*
*/
static void
wave (guchar *src,
guchar *dst,
gint width,
gint height,
gint bypp,
gboolean has_alpha,
gdouble cen_x,
gdouble cen_y,
gdouble amplitude,
gdouble wavelength,
gdouble phase,
gboolean smear,
gboolean reflective,
gboolean verbose)
{
glong rowsiz;
guchar *p;
guchar *dest;
gint x1, y1, x2, y2;
gint x, y;
gint prog_interval = 0;
gint x1_in, y1_in, x2_in, y2_in;
gdouble xhsiz, yhsiz; /* Half size of selection */
gdouble radius, radius2; /* Radius and radius^2 */
gdouble amnt, d;
gdouble needx, needy;
gdouble dx, dy;
gdouble xscale, yscale;
gint xi, yi;
guchar *values[4];
guchar zeroes[4] = { 0, 0, 0, 0 };
phase = phase * G_PI / 180.0;
rowsiz = width * bypp;
if (verbose)
{
gimp_progress_init (_("Waving"));
prog_interval = height / 10;
}
x1 = y1 = 0;
x2 = width;
y2 = height;
/* Compute wave radii (semiaxes) */
xhsiz = (double) (x2 - x1) / 2.0;
yhsiz = (double) (y2 - y1) / 2.0;
/* These are the necessary scaling factors to turn the wave
ellipse into a large circle */
if (xhsiz < yhsiz)
{
xscale = yhsiz / xhsiz;
yscale = 1.0;
}
else if (xhsiz > yhsiz)
{
xscale = 1.0;
yscale = xhsiz / yhsiz;
}
else
{
xscale = 1.0;
yscale = 1.0;
}
radius = MAX (xhsiz, yhsiz);
radius2 = radius * radius;
/* Wave the image! */
dst += y1 * rowsiz + x1 * bypp;
wavelength *= 2;
for (y = y1; y < y2; y++)
{
dest = dst;
if (verbose && (y % prog_interval == 0))
gimp_progress_update ((double) y / (double) height);
for (x = x1; x < x2; x++)
{
/* Distance from current point to wave center, scaled */
dx = (x - cen_x) * xscale;
dy = (y - cen_y) * yscale;
/* Distance^2 to center of *circle* (our scaled ellipse) */
d = sqrt (dx * dx + dy * dy);
/* Use the formula described above. */
/* Calculate waved point and scale again to ellipsify */
/*
* Reflective waves are strange - the effect is much
* more like a mirror which is in the shape of
* the wave than anything else.
*/
if (reflective)
{
amnt = amplitude * fabs (sin (((d / wavelength) * (2.0 * G_PI) +
phase)));
needx = (amnt * dx) / xscale + cen_x;
needy = (amnt * dy) / yscale + cen_y;
}
else
{
amnt = amplitude * sin (((d / wavelength) * (2.0 * G_PI) +
phase));
needx = (amnt + dx) / xscale + cen_x;
needy = (amnt + dy) / yscale + cen_y;
}
/* Calculations complete; now copy the proper pixel */
if (smear)
{
xi = CLAMP (needx, 0, width - 2);
yi = CLAMP (needy, 0, height - 2);
}
else
{
xi = needx;
yi = needy;
}
p = src + rowsiz * yi + xi * bypp;
x1_in = WITHIN (0, xi, width - 1);
y1_in = WITHIN (0, yi, height - 1);
x2_in = WITHIN (0, xi + 1, width - 1);
y2_in = WITHIN (0, yi + 1, height - 1);
if (x1_in && y1_in)
values[0] = p;
else
values[0] = zeroes;
if (x2_in && y1_in)
values[1] = p + bypp;
else
values[1] = zeroes;
if (x1_in && y2_in)
values[2] = p + rowsiz;
else
values[2] = zeroes;
if (x2_in && y2_in)
values[3] = p + bypp + rowsiz;
else
values[3] = zeroes;
gimp_bilinear_pixels_8 (dest, needx, needy, bypp, has_alpha, values);
dest += bypp;
}
dst += rowsiz;
}
if (verbose)
gimp_progress_update (1.0);
}
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