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gimp/plug-ins/common/illusion.c

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/*
* illusion.c -- This is a plug-in for the GIMP 1.0
*
* Copyright (C) 1997 Hirotsuna Mizuno
* s1041150@u-aizu.ac.jp
*
* Preview and new mode added May 2000 by tim copperfield
* timecop@japan.co.jp
* http://www.ne.jp/asahi/linux/timecop
*
* 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 <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-illusion"
#define PLUG_IN_BINARY "illusion"
#define PLUG_IN_VERSION "v0.8 (May 14 2000)"
static void query (void);
static void run (const gchar *name,
gint nparam,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void illusion (GimpDrawable *drawable);
static void illusion_preview (GimpPreview *preview,
GimpDrawable *drawable);
static gboolean illusion_dialog (GimpDrawable *drawable);
typedef struct
{
gint32 division;
gboolean type1;
gboolean type2;
} IllValues;
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
static IllValues parameters =
{
8, /* division */
TRUE, /* type 1 */
FALSE /* type 2 */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "interactive / non-interactive" },
{ GIMP_PDB_IMAGE, "image", "input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "input drawable" },
{ GIMP_PDB_INT32, "division", "the number of divisions" },
{ GIMP_PDB_INT32, "type", "illusion type (0=type1, 1=type2)" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Superimpose many altered copies of the image"),
"produce illusion",
"Hirotsuna Mizuno <s1041150@u-aizu.ac.jp>",
"Hirotsuna Mizuno",
PLUG_IN_VERSION,
N_("_Illusion..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Map");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *params,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam returnv[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRunMode run_mode;
GimpDrawable *drawable;
INIT_I18N ();
/* get the drawable info */
run_mode = params[0].data.d_int32;
drawable = gimp_drawable_get (params[2].data.d_drawable);
*nreturn_vals = 1;
*return_vals = returnv;
/* switch the run mode */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC, &parameters);
if (! illusion_dialog (drawable))
return;
gimp_set_data (PLUG_IN_PROC, &parameters, sizeof (IllValues));
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 5)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
parameters.division = params[3].data.d_int32;
if (params[4].data.d_int32 == 0)
{
parameters.type1 = TRUE;
parameters.type2 = FALSE;
}
else
{
parameters.type1 = FALSE;
parameters.type2 = TRUE;
}
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC, &parameters);
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id))
{
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width() + 1));
gimp_progress_init (_("Illusion"));
illusion (drawable);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
returnv[0].type = GIMP_PDB_STATUS;
returnv[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
typedef struct {
GimpPixelFetcher *pft;
gdouble center_x;
gdouble center_y;
gdouble scale;
gdouble offset;
gboolean has_alpha;
} IllusionParam_t;
static void
illusion_func (gint x,
gint y,
const guchar *src,
guchar *dest,
gint bpp,
gpointer data)
{
IllusionParam_t *param = (IllusionParam_t*) data;
gint xx, yy, b;
gdouble radius, cx, cy, angle;
guchar pixel[4];
cy = ((gdouble) y - param->center_y) / param->scale;
cx = ((gdouble) x - param->center_x) / param->scale;
angle = floor (atan2 (cy, cx) * parameters.division / G_PI_2)
* G_PI_2 / parameters.division + (G_PI / parameters.division);
radius = sqrt ((gdouble) (cx * cx + cy * cy));
if (parameters.type1)
{
xx = x - param->offset * cos (angle);
yy = y - param->offset * sin (angle);
}
else /* Type 2 */
{
xx = x - param->offset * sin (angle);
yy = y - param->offset * cos (angle);
}
gimp_pixel_fetcher_get_pixel (param->pft, xx, yy, pixel);
if (param->has_alpha)
{
guint alpha1 = src[bpp - 1];
guint alpha2 = pixel[bpp - 1];
guint alpha = (1 - radius) * alpha1 + radius * alpha2;
if ((dest[bpp - 1] = (alpha >> 1)))
{
for (b = 0; b < bpp - 1; b++)
dest[b] = ((1 - radius) * src[b] * alpha1 +
radius * pixel[b] * alpha2) / alpha;
}
}
else
{
for (b = 0; b < bpp; b++)
dest[b] = (1 - radius) * src[b] + radius * pixel[b];
}
}
static void
illusion (GimpDrawable *drawable)
{
IllusionParam_t param;
GimpRgnIterator *iter;
gint width, height;
gint x1, y1, x2, y2;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
param.pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_pixel_fetcher_set_edge_mode (param.pft, GIMP_PIXEL_FETCHER_EDGE_SMEAR);
param.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
param.center_x = (x1 + x2) / 2.0;
param.center_y = (y1 + y2) / 2.0;
param.scale = sqrt (width * width + height * height) / 2;
param.offset = (gint) (param.scale / 2);
iter = gimp_rgn_iterator_new (drawable, 0);
gimp_rgn_iterator_src_dest (iter, illusion_func, &param);
gimp_rgn_iterator_free (iter);
gimp_pixel_fetcher_destroy (param.pft);
}
static void
illusion_preview (GimpPreview *preview,
GimpDrawable *drawable)
{
guchar **pixels;
guchar *destpixels;
guchar *preview_cache;
gint width;
gint height;
gint bpp;
gint center_x;
gint center_y;
gint x, y, b;
gint xx = 0;
gint yy = 0;
gdouble scale, radius, cx, cy, angle, offset, zoom;
preview_cache = 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,
&center_x, &center_y);
pixels = g_new (guchar *, height);
destpixels = g_new (guchar, height * width * bpp);
for (y = 0; y < height; y++)
{
pixels[y] = g_new (guchar, width * bpp);
memcpy (pixels[y],
preview_cache + width * bpp * y,
width * bpp);
}
scale = sqrt (width * width * zoom * zoom + height * height * zoom * zoom) / 2;
offset = (gint) (scale / 2);
for (y = 0; y < height; y++)
{
cy = ((gdouble)y - center_y) / scale;
for (x = 0; x < width; x++)
{
cx = ((gdouble)x - center_x) / scale;
angle = floor (atan2 (cy, cx) * parameters.division / G_PI_2)
* G_PI_2 / parameters.division + (G_PI / parameters.division);
radius = sqrt ((gdouble) (cx * cx + cy * cy));
if (parameters.type1)
{
xx = x - offset * cos (angle);
yy = y - offset * sin (angle);
}
else /* Type 2 */
{
xx = x - offset * sin (angle);
yy = y - offset * cos (angle);
}
xx = CLAMP (xx, 0, width - 1);
yy = CLAMP (yy, 0, height - 1);
if (bpp == 2 || bpp == 4)
{
gdouble alpha1 = pixels[y][x * bpp + bpp - 1];
gdouble alpha2 = pixels[yy][xx * bpp + bpp - 1];
gdouble alpha = (1 - radius) * alpha1 + radius * alpha2;
for (b = 0; alpha > 0 && b < bpp - 1; b++)
{
destpixels[(y * width + x) * bpp+b] =
((1-radius) * alpha1 * pixels[y][x * bpp + b]
+ radius * alpha2 * pixels[yy][xx * bpp + b])/alpha;
}
destpixels[(y * width + x) * bpp + bpp-1] = alpha;
}
else
{
for (b = 0; b < bpp; b++)
destpixels[(y * width + x) * bpp+b] =
(1-radius) * pixels[y][x * bpp + b]
+ radius * pixels[yy][xx * bpp + b];
}
}
}
gimp_preview_draw_buffer (preview, destpixels, width * bpp);
for (y = 0; y < height; y++)
g_free (pixels[y]);
g_free (pixels);
g_free (destpixels);
g_free (preview_cache);
}
static gboolean
illusion_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *table;
GtkWidget *spinbutton;
GtkObject *adj;
GtkWidget *radio;
GSList *group = NULL;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Illusion"), 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_zoom_preview_new (drawable);
gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
gtk_widget_show (preview);
g_signal_connect (preview, "invalidated",
G_CALLBACK (illusion_preview),
drawable);
table = gtk_table_new (3, 2, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
spinbutton = gimp_spin_button_new (&adj, parameters.division,
-32, 64, 1, 10, 0, 1, 0);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("_Divisions:"), 0.0, 0.5,
spinbutton, 1, TRUE);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&parameters.division);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
radio = gtk_radio_button_new_with_mnemonic (group, _("Mode _1"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (radio));
gtk_table_attach (GTK_TABLE (table), radio, 0, 2, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (radio);
g_signal_connect (radio, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&parameters.type1);
g_signal_connect_swapped (radio, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (radio), parameters.type1);
radio = gtk_radio_button_new_with_mnemonic (group, _("Mode _2"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (radio));
gtk_table_attach (GTK_TABLE (table), radio, 0, 2, 2, 3,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (radio);
g_signal_connect (radio, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&parameters.type2);
g_signal_connect_swapped (radio, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (radio), parameters.type2);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
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