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gimp/plug-ins/common/nova.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Supernova plug-in
* Copyright (C) 1997 Eiichi Takamori <taka@ma1.seikyou.ne.jp>,
* Spencer Kimball, Federico Mena Quintero
*
* 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.
*/
/*
* version 1.200
*
* This plug-in produces an effect like a supernova burst.
*
* Eiichi Takamori <taka@ma1.seikyou.ne.jp>
* http://ha1.seikyou.ne.jp/home/taka/gimp/
*
* Preview render mode by timecop@japan.co.jp
* http://www.ne.jp/asahi/linux/timecop
*
* Changes from version 1.122 to version 1.200 by tim copperfield:
* - preview mode now previews the nova with scale;
* - toggle for cursor show/hide during preview
*
* Changes from version 1.1115 to version 1.122 by Martin Weber:
* - Little bug fixes
* - Added random hue
* - Freeing memory
*
* Changes from version 1.1114 to version 1.1115:
* - Added gtk_rc_parse
* - Fixed bug that drawing preview of small height image
* (maybe image height < PREVIEW_SIZE) caused core dump.
* - Changed default value.
* - Moved to <Image>/Filters/Effects. right?
* - etc...
*
* Changes from version 1.1112 to version 1.1114:
* - Modified proc args to GIMP_PDB_COLOR, also included nspoke.
* - nova_int_entryscale_new(): Fixed caption was guchar -> gchar, etc.
* - Now nova renders properly with alpha channel.
* (Very thanks to Spencer Kimball and Federico Mena !)
*
* TODO:
* - clean up the code more
* - add notebook interface and so on
*/
#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-nova"
#define PLUG_IN_BINARY "nova"
#define SCALE_WIDTH 125
typedef struct
{
gint xcenter;
gint ycenter;
GimpRGB color;
gint radius;
gint nspoke;
gint randomhue;
} NovaValues;
typedef struct
{
GimpDrawable *drawable;
GimpPreview *preview;
GtkWidget *coords;
gint cursor_drawn;
gint curx, cury; /* x,y of cursor in preview */
gint oldx, oldy;
} NovaCenter;
/* Declare a local function.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void nova (GimpDrawable *drawable,
GimpPreview *preview);
static gboolean nova_dialog (GimpDrawable *drawable);
static GtkWidget * nova_center_create (GimpDrawable *drawable,
GimpPreview *preview);
static void nova_center_cursor_draw (NovaCenter *center);
static void nova_center_coords_update (GimpSizeEntry *coords,
NovaCenter *center);
static void nova_center_cursor_update (NovaCenter *center);
static void nova_center_preview_realize (GtkWidget *widget,
NovaCenter *center);
static gboolean nova_center_preview_expose (GtkWidget *widget,
GdkEvent *event,
NovaCenter *center);
static gboolean nova_center_preview_events (GtkWidget *widget,
GdkEvent *event,
NovaCenter *center);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static NovaValues pvals =
{
128, 128, /* xcenter, ycenter */
{ 0.35, 0.39, 1.0, 1.0 }, /* color */
20, /* radius */
100, /* nspoke */
0 /* random hue */
};
static gboolean show_cursor = TRUE;
MAIN ()
static void
query (void)
{
static const 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_INT32, "xcenter", "X coordinates of the center of supernova" },
{ GIMP_PDB_INT32, "ycenter", "Y coordinates of the center of supernova" },
{ GIMP_PDB_COLOR, "color", "Color of supernova" },
{ GIMP_PDB_INT32, "radius", "Radius of supernova" },
{ GIMP_PDB_INT32, "nspoke", "Number of spokes" },
{ GIMP_PDB_INT32, "randomhue", "Random hue" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Add a starburst to the image"),
"This plug-in produces an effect like a supernova "
"burst. The amount of the light effect is "
"approximately in proportion to 1/r, where r is the "
"distance from the center of the star. It works with "
"RGB*, GRAY* image.",
"Eiichi Takamori",
"Eiichi Takamori",
"May 2000",
N_("Super_nova..."),
"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;
INIT_I18N ();
run_mode = param[0].data.d_int32;
*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);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &pvals);
/* First acquire information with a dialog */
if (! nova_dialog (drawable))
{
gimp_drawable_detach (drawable);
return;
}
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 9)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
pvals.xcenter = param[3].data.d_int32;
pvals.ycenter = param[4].data.d_int32;
pvals.color = param[5].data.d_color;
pvals.radius = param[6].data.d_int32;
pvals.nspoke = param[7].data.d_int32;
pvals.randomhue = param[8].data.d_int32;
}
if ((status == GIMP_PDB_SUCCESS) &&
pvals.radius <= 0)
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &pvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* 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 (_("Rendering supernova"));
gimp_tile_cache_ntiles (2 *
(drawable->width / gimp_tile_width () + 1));
nova (drawable, NULL);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &pvals, sizeof (NovaValues));
}
else
{
/* gimp_message ("nova: cannot operate on indexed color images"); */
status = GIMP_PDB_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
/*******************/
/* Main Dialog */
/*******************/
static gboolean
nova_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *button;
GtkObject *adj;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Supernova"), 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_widget_add_events (GIMP_PREVIEW (preview)->area,
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON1_MOTION_MASK);
gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (nova),
drawable);
frame = nova_center_create (drawable, GIMP_PREVIEW (preview));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (4, 3, 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);
/* Color */
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
button = gimp_color_button_new (_("Supernova Color Picker"),
SCALE_WIDTH - 8, 16,
&pvals.color, GIMP_COLOR_AREA_FLAT);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Co_lor:"), 0.0, 0.5,
button, 1, TRUE);
g_signal_connect (button, "color-changed",
G_CALLBACK (gimp_color_button_get_color),
&pvals.color);
g_signal_connect_swapped (button, "color-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
}
/* Radius */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("_Radius:"), SCALE_WIDTH, 8,
pvals.radius, 1, 100, 1, 10, 0,
FALSE, 1, GIMP_MAX_IMAGE_SIZE,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&pvals.radius);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
/* Number of spokes */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("_Spokes:"), SCALE_WIDTH, 8,
pvals.nspoke, 1, 1024, 1, 16, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&pvals.nspoke);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
/* Randomness of hue */
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("R_andom hue:"), SCALE_WIDTH, 8,
pvals.randomhue, 0, 360, 1, 15, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&pvals.randomhue);
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;
}
/*=================================================================
CenterFrame
A frame that contains one preview and 2 entrys, used for positioning
of the center of Nova.
==================================================================*/
/*
* Create new CenterFrame, and return it (GtkFrame).
*/
static GtkWidget *
nova_center_create (GimpDrawable *drawable,
GimpPreview *preview)
{
NovaCenter *center;
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *check;
gint32 image_ID;
gdouble res_x;
gdouble res_y;
center = g_new0 (NovaCenter, 1);
center->drawable = drawable;
center->preview = preview;
center->cursor_drawn = FALSE;
center->curx = 0;
center->cury = 0;
center->oldx = 0;
center->oldy = 0;
frame = gimp_frame_new (_("Center of Nova"));
g_signal_connect_swapped (frame, "destroy",
G_CALLBACK (g_free),
center);
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
image_ID = gimp_drawable_get_image (drawable->drawable_id);
gimp_image_get_resolution (image_ID, &res_x, &res_y);
center->coords = gimp_coordinates_new (GIMP_UNIT_PIXEL, "%p", TRUE, TRUE, -1,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
FALSE, FALSE,
_("_X:"), pvals.xcenter, res_x,
- (gdouble) drawable->width,
2 * drawable->width,
0, drawable->width,
_("_Y:"), pvals.ycenter, res_y,
- (gdouble) drawable->height,
2 * drawable->height,
0, drawable->height);
gtk_table_set_row_spacing (GTK_TABLE (center->coords), 1, 6);
gtk_box_pack_start (GTK_BOX (hbox), center->coords, FALSE, FALSE, 0);
gtk_widget_show (center->coords);
g_signal_connect (center->coords, "value-changed",
G_CALLBACK (nova_center_coords_update),
center);
g_signal_connect (center->coords, "refval-changed",
G_CALLBACK (nova_center_coords_update),
center);
check = gtk_check_button_new_with_mnemonic (_("Show _position"));
gtk_table_attach (GTK_TABLE (center->coords), check, 0, 5, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), show_cursor);
gtk_widget_show (check);
g_signal_connect (check, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&show_cursor);
g_signal_connect_swapped (check, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect (preview->area, "realize",
G_CALLBACK (nova_center_preview_realize),
center);
g_signal_connect_after (preview->area, "expose-event",
G_CALLBACK (nova_center_preview_expose),
center);
g_signal_connect (preview->area, "event",
G_CALLBACK (nova_center_preview_events),
center);
nova_center_cursor_update (center);
return frame;
}
/*
* Drawing CenterFrame
* if update & PREVIEW, draw preview
* if update & CURSOR, draw cross cursor
*/
static void
nova_center_cursor_draw (NovaCenter *center)
{
GtkWidget *prvw = center->preview->area;
GtkStyle *style = gtk_widget_get_style (prvw);
gint width, height;
gimp_preview_get_size (center->preview, &width, &height);
gdk_gc_set_function (style->black_gc, GDK_INVERT);
if (show_cursor)
{
if (center->cursor_drawn)
{
gdk_draw_line (prvw->window,
style->black_gc,
center->oldx, 1, center->oldx,
height - 1);
gdk_draw_line (prvw->window,
style->black_gc,
1, center->oldy,
width - 1, center->oldy);
}
gdk_draw_line (prvw->window,
style->black_gc,
center->curx, 1, center->curx,
height - 1);
gdk_draw_line (prvw->window,
style->black_gc,
1, center->cury,
width - 1, center->cury);
}
/* current position of cursor is updated */
center->oldx = center->curx;
center->oldy = center->cury;
center->cursor_drawn = TRUE;
gdk_gc_set_function (style->black_gc, GDK_COPY);
}
/*
* CenterFrame entry callback
*/
static void
nova_center_coords_update (GimpSizeEntry *coords,
NovaCenter *center)
{
pvals.xcenter = gimp_size_entry_get_refval (coords, 0);
pvals.ycenter = gimp_size_entry_get_refval (coords, 1);
nova_center_cursor_update (center);
nova_center_cursor_draw (center);
gimp_preview_invalidate (center->preview);
}
/*
* Update the cross cursor's coordinates accoding to pvals.[xy]center
* but do not redraw it.
*/
static void
nova_center_cursor_update (NovaCenter *center)
{
gimp_preview_transform (center->preview,
pvals.xcenter, pvals.ycenter,
&center->curx, &center->cury);
}
/*
* Set the preview area'a cursor on realize
*/
static void
nova_center_preview_realize (GtkWidget *widget,
NovaCenter *center)
{
GdkDisplay *display = gtk_widget_get_display (widget);
GdkCursor *cursor = gdk_cursor_new_for_display (display, GDK_CROSSHAIR);
gimp_preview_set_default_cursor (center->preview, cursor);
gdk_cursor_unref (cursor);
}
/*
* Handle the expose event on the preview
*/
static gboolean
nova_center_preview_expose (GtkWidget *widget,
GdkEvent *event,
NovaCenter *center)
{
center->cursor_drawn = FALSE;
nova_center_cursor_update (center);
nova_center_cursor_draw (center);
return FALSE;
}
/*
* Handle other events on the preview
*/
static gboolean
nova_center_update (GtkWidget *widget,
NovaCenter *center,
gint x,
gint y)
{
gint tx, ty;
gimp_preview_untransform (center->preview, x, y, &tx, &ty);
nova_center_cursor_draw (center);
g_signal_handlers_block_by_func (center->coords,
nova_center_coords_update,
center);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (center->coords), 0, tx);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (center->coords), 1, ty);
g_signal_handlers_unblock_by_func (center->coords,
nova_center_coords_update,
center);
nova_center_coords_update (GIMP_SIZE_ENTRY (center->coords), center);
return TRUE;
}
static gboolean
nova_center_preview_events (GtkWidget *widget,
GdkEvent *event,
NovaCenter *center)
{
switch (event->type)
{
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (mevent->state & GDK_BUTTON1_MASK)
{
gboolean retval = nova_center_update (widget, center,
mevent->x, mevent->y);
gdk_event_request_motions (mevent);
return retval;
}
}
break;
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (bevent->button == 1)
return nova_center_update (widget, center, bevent->x, bevent->y);
}
break;
default:
break;
}
return FALSE;
}
/*
################################################################
## ##
## Main Calculation ##
## ##
################################################################
*/
static gdouble
gauss (GRand *gr)
{
gdouble sum = 0.0;
gint i;
for (i = 0; i < 6; i++)
sum += g_rand_double (gr);
return sum / 6.0;
}
static void
nova (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn src_rgn;
GimpPixelRgn dest_rgn;
gpointer pr;
guchar *src_row, *dest_row, *save_src;
guchar *src, *dest;
gint x1, y1, x2, y2, x, y;
gint row, col;
gint alpha, bpp;
gint progress, max_progress;
gboolean has_alpha;
gint xc, yc; /* center of nova */
gdouble u, v, l, w, w1, c, t;
gdouble *spoke;
gdouble nova_alpha, src_alpha, new_alpha = 0.0;
gdouble compl_ratio, ratio;
GimpRGB color;
GimpRGB *spokecolor;
GimpHSV hsv;
gdouble spokecol;
gint i;
GRand *gr;
guchar *cache = NULL;
gint width, height;
gdouble zoom = 0.0;
gr = g_rand_new ();
/* initialize */
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
spoke = g_new (gdouble, pvals.nspoke);
spokecolor = g_new (GimpRGB, pvals.nspoke);
gimp_rgb_set_alpha (&pvals.color, 1.0);
gimp_rgb_to_hsv (&pvals.color, &hsv);
for (i = 0; i < pvals.nspoke; i++)
{
spoke[i] = gauss (gr);
hsv.h += ((gdouble) pvals.randomhue / 360.0) *
g_rand_double_range (gr, -0.5, 0.5);
if (hsv.h < 0)
hsv.h += 1.0;
else if (hsv.h >= 1.0)
hsv.h -= 1.0;
gimp_hsv_to_rgb (&hsv, spokecolor + i);
}
if (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,
pvals.xcenter, pvals.ycenter, &xc, &yc);
x1 = 0;
y1 = 0;
x2 = width;
y2 = height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
bpp = gimp_drawable_bpp (drawable->drawable_id);
xc = pvals.xcenter;
yc = pvals.ycenter;
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, x2-x1, y2-y1, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, x2-x1, y2-y1, TRUE, TRUE);
}
alpha = (has_alpha) ? bpp - 1 : bpp;
/* Initialize progress */
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
if (preview)
{
save_src = src_row = g_new (guchar, y2 * width * bpp);
memcpy (src_row, cache, y2 * width * bpp);
dest_row = g_new (guchar, y2 * width * bpp);
dest = dest_row;
src = src_row;
for (row = 0, y = 0; row < y2; row++, y++)
{
for (col = 0, x = 0; col < x2; col++, x++)
{
u = ((gdouble) (x - xc) /
((gdouble) pvals.radius * width /
drawable->width * zoom));
v = ((gdouble) (y - yc) /
((gdouble) pvals.radius * height /
drawable->height * zoom));
l = sqrt (SQR (u) + SQR (v));
/* This algorithm is still under construction. */
t = (atan2 (u, v) / (2 * G_PI) + .51) * pvals.nspoke;
i = (gint) floor (t);
t -= i;
i %= pvals.nspoke;
w1 = spoke[i] * (1 - t) + spoke[(i + 1) % pvals.nspoke] * t;
w1 = w1 * w1;
w = 1.0 / (l + 0.001) * 0.9;
nova_alpha = CLAMP (w, 0.0, 1.0);
if (has_alpha)
{
src_alpha = (gdouble) src[alpha] / 255.0;
new_alpha = src_alpha + (1.0 - src_alpha) * nova_alpha;
if (new_alpha != 0.0)
ratio = nova_alpha / new_alpha;
else
ratio = 0.0;
}
else
ratio = nova_alpha;
compl_ratio = 1.0 - ratio;
/* red or gray */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
if (bpp>2)
{
/* green */
spokecol = (gdouble)spokecolor[i ].g * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].g * t;
if (w>1.0)
color.g = CLAMP (spokecol * w, 0.0, 1.0);
else
color.g = src[1]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.g += c;
dest[1] = CLAMP (color.g*255.0, 0, 255);
/* blue */
spokecol = (gdouble)spokecolor[i ].b * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].b * t;
if (w>1.0)
color.b = CLAMP (spokecol * w, 0.0, 1.0);
else
color.b = src[2]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.b += c;
dest[2] = CLAMP (color.b*255.0, 0, 255);
}
/* alpha */
if (has_alpha)
dest[alpha] = new_alpha * 255.0;
src += bpp;
dest += bpp;
}
}
gimp_preview_draw_buffer (preview, dest_row, bpp * width);
g_free (cache);
g_free (save_src);
g_free (dest_row);
}
else
{ /* normal mode */
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL ;
pr = gimp_pixel_rgns_process (pr))
{
src_row = src_rgn.data;
dest_row = dest_rgn.data;
for (row = 0, y = src_rgn.y; row < src_rgn.h; row++, y++)
{
src = src_row;
dest = dest_row;
for (col = 0, x = src_rgn.x; col < src_rgn.w; col++, x++)
{
u = (gdouble) (x-xc) / pvals.radius;
v = (gdouble) (y-yc) / pvals.radius;
l = sqrt(u*u + v*v);
/* This algorithm is still under construction. */
t = (atan2 (u, v) / (2 * G_PI) + .51) * pvals.nspoke;
i = (gint) floor (t);
t -= i;
i %= pvals.nspoke;
w1 = spoke[i] * (1 - t) + spoke[(i + 1) % pvals.nspoke] * t;
w1 = w1 * w1;
w = 1/(l+0.001)*0.9;
nova_alpha = CLAMP (w, 0.0, 1.0);
if (has_alpha)
{
src_alpha = (gdouble) src[alpha] / 255.0;
new_alpha = src_alpha + (1.0 - src_alpha) * nova_alpha;
if (new_alpha != 0.0)
ratio = nova_alpha / new_alpha;
else
ratio = 0.0;
}
else
ratio = nova_alpha;
compl_ratio = 1.0 - ratio;
switch (bpp)
{
case 1:
case 2:
/* gray */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
break;
case 3:
case 4:
/* red */
spokecol = (gdouble)spokecolor[i ].r * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].r * t;
if (w>1.0)
color.r = CLAMP (spokecol * w, 0.0, 1.0);
else
color.r = src[0]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.r += c;
dest[0] = CLAMP (color.r*255.0, 0, 255);
/* green */
spokecol = (gdouble)spokecolor[i ].g * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].g * t;
if (w>1.0)
color.g = CLAMP (spokecol * w, 0.0, 1.0);
else
color.g = src[1]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.g += c;
dest[1] = CLAMP (color.g*255.0, 0, 255);
/* blue */
spokecol = (gdouble)spokecolor[i ].b * (1.0-t) +
(gdouble)spokecolor[(i+1) % pvals.nspoke].b * t;
if (w>1.0)
color.b = CLAMP (spokecol * w, 0.0, 1.0);
else
color.b = src[2]/255.0 * compl_ratio + spokecol * ratio;
c = CLAMP (w1 * w, 0.0, 1.0);
color.b += c;
dest[2] = CLAMP (color.b*255.0, 0, 255);
break;
}
if (has_alpha)
dest[alpha] = new_alpha * 255.0;
src += src_rgn.bpp;
dest += dest_rgn.bpp;
}
src_row += src_rgn.rowstride;
dest_row += dest_rgn.rowstride;
}
/* Update progress */
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
}
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, (x2 - x1), (y2 - y1));
}
g_free (spoke);
g_free (spokecolor);
g_rand_free (gr);
}
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