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gimp/plug-ins/common/fractal-trace.c

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/******************************************************************************
fractaltrace.c -- This is a plug-in for GIMP 1.0
Copyright (C) 1997 Hirotsuna Mizuno
s1041150@u-aizu.ac.jp
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 3 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, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#define PLUG_IN_PROC "plug-in-fractal-trace"
#define PLUG_IN_BINARY "fractal-trace"
#define PLUG_IN_VERSION "v0.4 test version (Dec. 25 1997)"
/*****************************************************************************/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/******************************************************************************/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void filter (GimpDrawable *drawable);
static void pixels_init (GimpDrawable *drawable);
static void pixels_free (void);
static int dialog_show (void);
static void dialog_preview_draw (void);
/******************************************************************************/
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
MAIN ()
/******************************************************************************/
enum
{
OUTSIDE_TYPE_WRAP,
OUTSIDE_TYPE_TRANSPARENT,
OUTSIDE_TYPE_BLACK,
OUTSIDE_TYPE_WHITE
};
typedef struct
{
gdouble x1;
gdouble x2;
gdouble y1;
gdouble y2;
gint32 depth;
gint32 outside_type;
} parameter_t;
static parameter_t parameters =
{
-1.0,
+0.5,
-1.0,
+1.0,
3,
OUTSIDE_TYPE_WRAP
};
/******************************************************************************/
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", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_FLOAT, "xmin", "xmin fractal image delimiter" },
{ GIMP_PDB_FLOAT, "xmax", "xmax fractal image delimiter" },
{ GIMP_PDB_FLOAT, "ymin", "ymin fractal image delimiter" },
{ GIMP_PDB_FLOAT, "ymax", "ymax fractal image delimiter" },
{ GIMP_PDB_INT32, "depth", "Trace depth" },
{ GIMP_PDB_INT32, "outside-type", "Outside type "
"{ WRAP (0), TRANS (1), BLACK (2), WHITE (3) }" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Transform image with the Mandelbrot Fractal"),
"transform image with the Mandelbrot Fractal",
"Hirotsuna Mizuno <s1041150@u-aizu.ac.jp>",
"Copyright (C) 1997 Hirotsuna Mizuno",
PLUG_IN_VERSION,
N_("_Fractal Trace..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Map");
}
/******************************************************************************/
typedef struct
{
gint x1;
gint x2;
gint y1;
gint y2;
gint width;
gint height;
gdouble center_x;
gdouble center_y;
} selection_t;
typedef struct
{
gint width;
gint height;
gint bpp;
gint alpha;
} image_t;
static selection_t selection;
static image_t image;
/******************************************************************************/
static void
run (const gchar *name,
gint argc,
const GimpParam *args,
gint *retc,
GimpParam **rets)
{
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status;
static GimpParam returns[1];
run_mode = args[0].data.d_int32;
status = GIMP_PDB_SUCCESS;
INIT_I18N ();
drawable = gimp_drawable_get (args[2].data.d_drawable);
image.width = gimp_drawable_width( drawable->drawable_id);
image.height = gimp_drawable_height (drawable->drawable_id);
image.bpp = gimp_drawable_bpp (drawable->drawable_id);
image.alpha = gimp_drawable_has_alpha (drawable->drawable_id);
gimp_drawable_mask_bounds (drawable->drawable_id,
&selection.x1, &selection.y1,
&selection.x2, &selection.y2);
selection.width = selection.x2 - selection.y1;
selection.height = selection.y2 - selection.y1;
selection.center_x = selection.x1 + (gdouble) selection.width / 2.0;
selection.center_y = selection.y1 + (gdouble) selection.height / 2.0;
pixels_init (drawable);
if (!gimp_drawable_is_rgb(drawable->drawable_id) &&
!gimp_drawable_is_gray(drawable->drawable_id))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
switch (run_mode)
{
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC, &parameters);
break;
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC, &parameters);
if (!dialog_show ())
{
status = GIMP_PDB_EXECUTION_ERROR;
break;
}
gimp_set_data (PLUG_IN_PROC, &parameters, sizeof (parameter_t));
break;
case GIMP_RUN_NONINTERACTIVE:
if (argc != 9)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
parameters.x1 = args[3].data.d_float;
parameters.x2 = args[4].data.d_float;
parameters.y1 = args[5].data.d_float;
parameters.y2 = args[6].data.d_float;
parameters.depth = args[7].data.d_int32;
parameters.outside_type = args[8].data.d_int32;
}
break;
}
if (status == GIMP_PDB_SUCCESS)
{
gimp_tile_cache_ntiles(2 * (drawable->width / gimp_tile_width() + 1));
filter (drawable);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush();
}
gimp_drawable_detach (drawable);
pixels_free ();
returns[0].type = GIMP_PDB_STATUS;
returns[0].data.d_status = status;
*retc = 1;
*rets = returns;
}
/******************************************************************************/
static guchar **spixels;
static guchar **dpixels;
static GimpPixelRgn sPR;
static GimpPixelRgn dPR;
typedef struct
{
guchar r;
guchar g;
guchar b;
guchar a;
} pixel_t;
static void
pixels_init (GimpDrawable *drawable)
{
gint y;
gimp_pixel_rgn_init (&sPR, drawable,
0, 0, image.width, image.height, FALSE, FALSE);
gimp_pixel_rgn_init (&dPR, drawable,
0, 0, image.width, image.height, TRUE, TRUE);
spixels = g_new (guchar *, image.height);
dpixels = g_new (guchar *, image.height);
for (y = 0; y < image.height; y++)
{
spixels[y] = g_new (guchar, image.width * image.bpp);
dpixels[y] = g_new (guchar, image.width * image.bpp);
gimp_pixel_rgn_get_row (&sPR, spixels[y], 0, y, image.width);
}
}
static void
pixels_free (void)
{
gint y;
for (y = 0; y < image.height; y++)
{
g_free (spixels[y]);
g_free (dpixels[y]);
}
g_free (spixels);
g_free (dpixels);
}
static void
pixels_get (gint x,
gint y,
pixel_t *pixel)
{
if(x < 0) x = 0; else if (image.width <= x) x = image.width - 1;
if(y < 0) y = 0; else if (image.height <= y) y = image.height - 1;
switch (image.bpp)
{
case 1: /* GRAY */
pixel->r = spixels[y][x*image.bpp];
pixel->g = spixels[y][x*image.bpp];
pixel->b = spixels[y][x*image.bpp];
pixel->a = 255;
break;
case 2: /* GRAY+A */
pixel->r = spixels[y][x*image.bpp];
pixel->g = spixels[y][x*image.bpp];
pixel->b = spixels[y][x*image.bpp];
pixel->a = spixels[y][x*image.bpp+1];
break;
case 3: /* RGB */
pixel->r = spixels[y][x*image.bpp];
pixel->g = spixels[y][x*image.bpp+1];
pixel->b = spixels[y][x*image.bpp+2];
pixel->a = 255;
break;
case 4: /* RGB+A */
pixel->r = spixels[y][x*image.bpp];
pixel->g = spixels[y][x*image.bpp+1];
pixel->b = spixels[y][x*image.bpp+2];
pixel->a = spixels[y][x*image.bpp+3];
break;
}
}
static void
pixels_get_biliner (gdouble x,
gdouble y,
pixel_t *pixel)
{
pixel_t A, B, C, D;
gdouble a, b, c, d;
gint x1, y1, x2, y2;
gdouble dx, dy;
gdouble alpha;
x1 = (gint) floor (x);
x2 = x1 + 1;
y1 = (gint) floor (y);
y2 = y1 + 1;
dx = x - (gdouble) x1;
dy = y - (gdouble) y1;
a = (1.0 - dx) * (1.0 - dy);
b = dx * (1.0 - dy);
c = (1.0 - dx) * dy;
d = dx * dy;
pixels_get (x1, y1, &A);
pixels_get (x2, y1, &B);
pixels_get (x1, y2, &C);
pixels_get (x2, y2, &D);
alpha = 1.0001*(a * (gdouble) A.a + b * (gdouble) B.a
+ c * (gdouble) C.a + d * (gdouble) D.a);
pixel->a = (guchar) alpha;
if (pixel->a)
{
pixel->r = (guchar) ((a * (gdouble) A.r * A.a
+ b * (gdouble) B.r * B.a
+ c * (gdouble) C.r * C.a
+ d * (gdouble) D.r * D.a) / alpha);
pixel->g = (guchar) ((a * (gdouble) A.g * A.a
+ b * (gdouble) B.g * B.a
+ c * (gdouble) C.g * C.a
+ d * (gdouble) D.g * D.a) / alpha);
pixel->b = (guchar) ((a * (gdouble) A.b * A.a
+ b * (gdouble) B.b * B.a
+ c * (gdouble) C.b * C.a
+ d * (gdouble) D.b * D.a) / alpha);
}
}
static void
pixels_set (gint x,
gint y,
pixel_t *pixel)
{
switch (image.bpp)
{
case 1: /* GRAY */
dpixels[y][x*image.bpp] = pixel->r;
break;
case 2: /* GRAY+A */
dpixels[y][x*image.bpp] = pixel->r;
dpixels[y][x*image.bpp+1] = pixel->a;
break;
case 3: /* RGB */
dpixels[y][x*image.bpp] = pixel->r;
dpixels[y][x*image.bpp+1] = pixel->g;
dpixels[y][x*image.bpp+2] = pixel->b;
break;
case 4: /* RGB+A */
dpixels[y][x*image.bpp] = pixel->r;
dpixels[y][x*image.bpp+1] = pixel->g;
dpixels[y][x*image.bpp+2] = pixel->b;
dpixels[y][x*image.bpp+3] = pixel->a;
break;
}
}
static void
pixels_store (void)
{
gint y;
for (y = selection.y1; y < selection.y2; y++)
{
gimp_pixel_rgn_set_row (&dPR, dpixels[y], 0, y, image.width);
}
}
/******************************************************************************/
static void
mandelbrot (gdouble x,
gdouble y,
gdouble *u,
gdouble *v)
{
gint iter = 0;
gdouble xx = x;
gdouble yy = y;
gdouble x2 = xx * xx;
gdouble y2 = yy * yy;
gdouble tmp;
while (iter < parameters.depth)
{
tmp = x2 - y2 + x;
yy = 2 * xx * yy + y;
xx = tmp;
x2 = xx * xx;
y2 = yy * yy;
iter++;
}
*u = xx;
*v = yy;
}
/******************************************************************************/
static void
filter (GimpDrawable *drawable)
{
gint x, y;
pixel_t pixel;
gdouble scale_x, scale_y;
gdouble cx, cy;
gdouble px, py;
gimp_progress_init (_("Fractal Trace"));
scale_x = (parameters.x2 - parameters.x1) / selection.width;
scale_y = (parameters.y2 - parameters.y1) / selection.height;
for (y = selection.y1; y < selection.y2; y++)
{
cy = parameters.y1 + (y - selection.y1) * scale_y;
for (x = selection.x1; x < selection.x2; x++)
{
cx = parameters.x1 + (x - selection.x1) * scale_x;
mandelbrot (cx, cy, &px, &py);
px = (px - parameters.x1) / scale_x + selection.x1;
py = (py - parameters.y1) / scale_y + selection.y1;
if (0 <= px && px < image.width && 0 <= py && py < image.height)
{
pixels_get_biliner (px, py, &pixel);
}
else
{
switch (parameters.outside_type)
{
case OUTSIDE_TYPE_WRAP:
px = fmod (px, image.width);
py = fmod (py, image.height);
if( px < 0.0) px += image.width;
if (py < 0.0) py += image.height;
pixels_get_biliner (px, py, &pixel);
break;
case OUTSIDE_TYPE_TRANSPARENT:
pixel.r = pixel.g = pixel.b = 0;
pixel.a = 0;
break;
case OUTSIDE_TYPE_BLACK:
pixel.r = pixel.g = pixel.b = 0;
pixel.a = 255;
break;
case OUTSIDE_TYPE_WHITE:
pixel.r = pixel.g = pixel.b = 255;
pixel.a = 255;
break;
}
}
pixels_set (x, y, &pixel);
}
if (((y - selection.y1) % (selection.height / 100)) == 0)
gimp_progress_update ((gdouble) (y-selection.y1) / selection.height);
}
gimp_progress_update (1.0);
pixels_store ();
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
selection.x1, selection.y1,
selection.width, selection.height);
}
/******************************************************************************/
#define PREVIEW_SIZE 200
typedef struct
{
GtkWidget *preview;
guchar *pixels;
gdouble scale;
gint width;
gint height;
gint bpp;
} preview_t;
static preview_t preview;
static void
dialog_preview_setpixel (gint x,
gint y,
pixel_t *pixel)
{
preview.pixels[(y * preview.width + x) * 4 + 0] = pixel->r;
preview.pixels[(y * preview.width + x) * 4 + 1] = pixel->g;
preview.pixels[(y * preview.width + x) * 4 + 2] = pixel->b;
preview.pixels[(y * preview.width + x) * 4 + 3] = pixel->a;
}
static void
dialog_preview_init (void)
{
pixel_t pixel;
gint x, y;
gdouble cx, cy;
if (image.width < image.height)
preview.scale = (gdouble)selection.height / (gdouble)PREVIEW_SIZE;
else
preview.scale = (gdouble)selection.width / (gdouble)PREVIEW_SIZE;
preview.width = (gdouble)selection.width / preview.scale;
preview.height = (gdouble)selection.height / preview.scale;
preview.preview = gimp_preview_area_new ();
gtk_widget_set_size_request (preview.preview,
preview.width, preview.height);
preview.pixels = g_new (guchar, preview.height * preview.width * 4);
for (y = 0; y < preview.height; y++)
{
cy = selection.y1 + (gdouble)y * preview.scale;
for (x = 0; x < preview.width; x++)
{
cx = selection.x1 + (gdouble)x * preview.scale;
pixels_get_biliner (cx, cy, &pixel);
dialog_preview_setpixel (x, y, &pixel);
}
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview.preview),
0, 0, preview.width, preview.height,
GIMP_RGBA_IMAGE,
preview.pixels,
preview.width *4);
}
static void
dialog_preview_draw (void)
{
gint x, y;
pixel_t pixel;
gdouble scale_x, scale_y;
gdouble cx, cy;
gdouble px, py;
scale_x = (parameters.x2 - parameters.x1) / preview.width;
scale_y = (parameters.y2 - parameters.y1) / preview.height;
for (y = 0; y < preview.height; y++)
{
cy = parameters.y1 + y * scale_y;
for (x = 0; x < preview.width; x++)
{
cx = parameters.x1 + x * scale_x;
mandelbrot(cx, cy, &px, &py);
px = (px - parameters.x1) / scale_x * preview.scale + selection.x1;
py = (py - parameters.y1) / scale_y * preview.scale + selection.y1;
if (0 <= px && px < image.width && 0 <= py && py < image.height)
{
pixels_get_biliner (px, py, &pixel);
}
else
{
switch (parameters.outside_type)
{
case OUTSIDE_TYPE_WRAP:
px = fmod (px, image.width);
py = fmod (py, image.height);
if (px < 0.0) px += image.width;
if (py < 0.0) py += image.height;
pixels_get_biliner (px, py, &pixel);
break;
case OUTSIDE_TYPE_TRANSPARENT:
pixel.r = pixel.g = pixel.b = 0;
pixel.a = 0;
break;
case OUTSIDE_TYPE_BLACK:
pixel.r = pixel.g = pixel.b = 0;
pixel.a = 255;
break;
case OUTSIDE_TYPE_WHITE:
pixel.r = pixel.g = pixel.b = 255;
pixel.a = 255;
break;
}
}
dialog_preview_setpixel (x, y, &pixel);
}
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview.preview),
0, 0, preview.width, preview.height,
GIMP_RGBA_IMAGE,
preview.pixels,
preview.width *4);
}
/******************************************************************************/
static void
dialog_int_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
gimp_int_adjustment_update (adjustment, data);
dialog_preview_draw ();
}
static void
dialog_double_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
gimp_double_adjustment_update (adjustment, data);
dialog_preview_draw ();
}
static void
dialog_outside_type_callback (GtkWidget *widget,
gpointer *data)
{
gimp_radio_button_update (widget, data);
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
dialog_preview_draw ();
}
/******************************************************************************/
static gboolean
dialog_show (void)
{
GtkWidget *dialog;
GtkWidget *mainbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *frame;
GtkWidget *abox;
GtkObject *adj;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Fractal Trace"), 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));
mainbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (mainbox), 12);
gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
mainbox);
gtk_widget_show (mainbox);
hbox = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start (GTK_BOX (mainbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* Preview */
abox = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (hbox), abox, FALSE, FALSE, 0);
gtk_widget_show (abox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (abox), frame);
gtk_widget_show (frame);
dialog_preview_init ();
gtk_container_add (GTK_CONTAINER (frame), preview.preview);
gtk_widget_show (preview.preview);
/* Settings */
frame = gimp_int_radio_group_new (TRUE, _("Outside Type"),
G_CALLBACK (dialog_outside_type_callback),
&parameters.outside_type,
parameters.outside_type,
_("_Wrap"),
OUTSIDE_TYPE_WRAP, NULL,
_("_Transparent"),
OUTSIDE_TYPE_TRANSPARENT, NULL,
_("_Black"),
OUTSIDE_TYPE_BLACK, NULL,
_("_White"),
OUTSIDE_TYPE_WHITE, NULL,
NULL);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
frame = gimp_frame_new (_("Mandelbrot Parameters"));
gtk_box_pack_start (GTK_BOX (mainbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (5, 3, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("X_1:"), 0, 6,
parameters.x1, -50, 50, 0.1, 0.5, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialog_double_adjustment_update),
&parameters.x1);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("X_2:"), 0, 6,
parameters.x2, -50, 50, 0.1, 0.5, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialog_double_adjustment_update),
&parameters.x2);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Y_1:"), 0, 6,
parameters.y1, -50, 50, 0.1, 0.5, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialog_double_adjustment_update),
&parameters.y1);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("Y_2:"), 0, 6,
parameters.y2, -50, 50, 0.1, 0.5, 2,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialog_double_adjustment_update),
&parameters.y2);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("_Depth:"), 0, 6,
parameters.depth, 1, 50, 1, 5, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialog_int_adjustment_update),
&parameters.depth);
gtk_widget_show (dialog);
dialog_preview_draw ();
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
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