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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- *
- * Pixelize plug-in (ported to GIMP v1.0)
- * Copyright (C) 1997 Eiichi Takamori <taka@ma1.seikyou.ne.jp>
- * original pixelize.c for GIMP 0.54 by Tracy Scott
- *
- * 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 1.04
- * This version requires GIMP v0.99.10 or above.
- *
- * This plug-in "pixelizes" the image.
- *
- * Eiichi Takamori <taka@ma1.seikyou.ne.jp>
- * http://ha1.seikyou.ne.jp/home/taka/gimp/
- *
- * Changes from version 1.03 to version 1.04:
- * - Added gtk_rc_parse
- * - Added entry with scale
- * - Fixed bug that large pixelwidth >=64 sometimes caused core dump
- *
- * Changes from gimp-0.99.9/plug-ins/pixelize.c to version 1.03:
- * - Fixed comments and help strings
- * - Fixed `RGB, GRAY' to `RGB*, GRAY*'
- * - Fixed procedure db name `pixelize' to `plug_in_pixelize'
- *
- * Differences from Tracy Scott's original `pixelize' plug-in:
- *
- * - Algorithm is modified to work around with the tile management.
- * The way of pixelizing is switched by the value of pixelwidth. If
- * pixelwidth is greater than (or equal to) tile width, then this
- * plug-in makes GimpPixelRgn with that width and proceeds. Otherwise,
- * it makes the region named `PixelArea', whose size is smaller than
- * tile width and is multiply of pixel width, and acts onto it.
- */
-
- /* pixelize filter written for the GIMP
- * -Tracy Scott
- *
- * This filter acts as a low pass filter on the color components of
- * the provided region
- */
-
- #include "config.h"
-
- #include <stdio.h>
- #include <stdlib.h>
-
- #include <gtk/gtk.h>
-
- #include <libgimp/gimp.h>
- #include <libgimp/gimpui.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- #ifdef RCSID
- static char rcsid[] = "$Id: pixelize.c,v 1.16 2000/08/28 00:42:19 mitch Exp $";
- #endif
-
-
- /* Some useful macros */
-
- #define TILE_CACHE_SIZE 16
- #define SCALE_WIDTH 125
- #define ENTRY_WIDTH 50
-
- typedef struct
- {
- gint pixelwidth;
- } PixelizeValues;
-
- typedef struct
- {
- gint run;
- } PixelizeInterface;
-
- typedef struct
- {
- gint x, y, w, h;
- gint width;
- guchar *data;
- } PixelArea;
-
- /* Declare local functions.
- */
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
-
- static gint pixelize_dialog (void);
- static void pixelize_ok_callback (GtkWidget *widget,
- gpointer data);
-
- static void pixelize (GimpDrawable *drawable);
- static void pixelize_large (GimpDrawable *drawable, gint pixelwidth);
- static void pixelize_small (GimpDrawable *drawable, gint pixelwidth,
- gint tile_width);
- static void pixelize_sub (gint pixelwidth, gint bpp);
-
- /***** Local vars *****/
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run /* run_proc */
- };
-
- static PixelizeValues pvals =
- {
- 10
- };
-
- static PixelizeInterface pint =
- {
- FALSE /* run */
- };
-
- static PixelArea area;
-
- /***** Functions *****/
-
- MAIN ()
-
- static void
- query (void)
- {
- static 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, "pixelwidth", "Pixel width (the decrease in resolution)" }
- };
- static gint nargs = sizeof (args) / sizeof (args[0]);
-
- gimp_install_procedure ("plug_in_pixelize",
- "Pixelize the contents of the specified drawable",
- "Pixelize the contents of the specified drawable with speficied pixelizing width.",
- "Spencer Kimball & Peter Mattis, Tracy Scott, (ported to 1.0 by) Eiichi Takamori",
- "Spencer Kimball & Peter Mattis, Tracy Scott",
- "1995",
- N_("<Image>/Filters/Blur/Pixelize..."),
- "RGB*, GRAY*",
- 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 *drawable;
- GimpRunModeType run_mode;
- GimpPDBStatusType status = GIMP_PDB_SUCCESS;
-
- 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:
- INIT_I18N_UI();
- /* Possibly retrieve data */
- gimp_get_data ("plug_in_pixelize", &pvals);
-
- /* First acquire information with a dialog */
- if (! pixelize_dialog ())
- {
- gimp_drawable_detach (drawable);
- return;
- }
- break;
-
- case GIMP_RUN_NONINTERACTIVE:
- INIT_I18N();
- /* Make sure all the arguments are there! */
- if (nparams != 4)
- status = GIMP_PDB_CALLING_ERROR;
- if (status == GIMP_PDB_SUCCESS)
- {
- pvals.pixelwidth = (gdouble) param[3].data.d_int32;
- }
- if ((status == GIMP_PDB_SUCCESS) &&
- pvals.pixelwidth <= 0)
- status = GIMP_PDB_CALLING_ERROR;
- break;
-
- case GIMP_RUN_WITH_LAST_VALS:
- INIT_I18N();
- /* Possibly retrieve data */
- gimp_get_data ("plug_in_pixelize", &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->id) ||
- gimp_drawable_is_gray (drawable->id))
- {
- gimp_progress_init (_("Pixelizing..."));
-
- /* set the tile cache size */
- gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
-
- /* run the pixelize effect */
- pixelize (drawable);
-
- if (run_mode != GIMP_RUN_NONINTERACTIVE)
- gimp_displays_flush ();
-
- /* Store data */
- if (run_mode == GIMP_RUN_INTERACTIVE)
- gimp_set_data ("plug_in_pixelize", &pvals, sizeof (PixelizeValues));
- }
- else
- {
- /* g_message ("pixelize: cannot operate on indexed color images"); */
- status = GIMP_PDB_EXECUTION_ERROR;
- }
- }
-
- values[0].data.d_status = status;
-
- gimp_drawable_detach (drawable);
- }
-
- static gint
- pixelize_dialog (void)
- {
- GtkWidget *dlg;
- GtkWidget *frame;
- GtkWidget *table;
- GtkObject *adjustment;
-
- gimp_ui_init ("pixelize", FALSE);
-
- dlg = gimp_dialog_new (_("Pixelize"), "pixelize",
- gimp_standard_help_func, "filters/pixelize.html",
- GTK_WIN_POS_MOUSE,
- FALSE, TRUE, FALSE,
-
- _("OK"), pixelize_ok_callback,
- NULL, NULL, NULL, TRUE, FALSE,
- _("Cancel"), gtk_widget_destroy,
- NULL, 1, NULL, FALSE, TRUE,
-
- NULL);
-
- gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
- GTK_SIGNAL_FUNC (gtk_main_quit),
- NULL);
-
- /* parameter settings */
- frame = gtk_frame_new (_("Parameter Settings"));
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
- gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
- gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
-
- table = gtk_table_new (1, 3, FALSE);
- gtk_table_set_col_spacings (GTK_TABLE (table), 4);
- gtk_container_set_border_width (GTK_CONTAINER (table), 4);
- gtk_container_add (GTK_CONTAINER (frame), table);
-
- adjustment =
- gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
- _("Pixel Width:"), SCALE_WIDTH, ENTRY_WIDTH,
- pvals.pixelwidth, 1, 64, 1, 8, 0,
- FALSE, 0, GIMP_MAX_IMAGE_SIZE,
- NULL, NULL);
- gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
- GTK_SIGNAL_FUNC (gimp_int_adjustment_update),
- &pvals.pixelwidth);
-
- gtk_widget_show (frame);
- gtk_widget_show (table);
- gtk_widget_show (dlg);
-
- gtk_main ();
- gdk_flush ();
-
- return pint.run;
- }
-
- /* Pixelize interface functions */
-
- static void
- pixelize_ok_callback (GtkWidget *widget,
- gpointer data)
- {
- pint.run = TRUE;
-
- gtk_widget_destroy (GTK_WIDGET (data));
- }
-
- /*
- Pixelize Effect
- */
-
- static void
- pixelize (GimpDrawable *drawable)
- {
- gint tile_width;
- gint pixelwidth;
-
- tile_width = gimp_tile_width();
- pixelwidth = pvals.pixelwidth;
-
- if (pixelwidth < 0)
- pixelwidth = - pixelwidth;
- if (pixelwidth < 1)
- pixelwidth = 1;
-
- if (pixelwidth >= tile_width)
- pixelize_large (drawable, pixelwidth);
- else
- pixelize_small (drawable, pixelwidth, tile_width);
- }
-
- /*
- This function operates on the image when pixelwidth >= tile_width.
- It simply sets the size of GimpPixelRgn as pixelwidth and proceeds.
- */
- static void
- pixelize_large (GimpDrawable *drawable,
- gint pixelwidth)
- {
- GimpPixelRgn src_rgn, dest_rgn;
- guchar *src_row, *dest_row;
- guchar *src, *dest;
- gulong *average;
- gint row, col, b, bpp;
- gint x, y, x_step, y_step;
- gulong count;
- gint x1, y1, x2, y2;
- gint progress, max_progress;
- gpointer pr;
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
-
- bpp = gimp_drawable_bpp(drawable->id);
- average = g_new(gulong, bpp);
-
- /* Initialize progress */
- progress = 0;
- max_progress = 2 * (x2 - x1) * (y2 - y1);
-
- for (y = y1; y < y2; y += pixelwidth - (y % pixelwidth))
- {
- for (x = x1; x < x2; x += pixelwidth - (x % pixelwidth))
- {
- x_step = pixelwidth - (x % pixelwidth);
- y_step = pixelwidth - (y % pixelwidth);
- x_step = MIN(x_step, x2-x);
- y_step = MIN(y_step, y2-y);
-
- gimp_pixel_rgn_init (&src_rgn, drawable,
- x, y, x_step, y_step, FALSE, FALSE);
- for (b = 0; b < bpp; b++)
- average[b] = 0;
- count = 0;
-
- for (pr = gimp_pixel_rgns_register (1, &src_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process (pr))
- {
- src_row = src_rgn.data;
- for (row = 0; row < src_rgn.h; row++)
- {
- src = src_row;
- for (col = 0; col < src_rgn.w; col++)
- {
- for(b = 0; b < bpp; b++)
- average[b] += src[b];
- src += src_rgn.bpp;
- count += 1;
- }
- src_row += src_rgn.rowstride;
- }
- /* Update progress */
- progress += src_rgn.w * src_rgn.h;
- gimp_progress_update ((double) progress / (double) max_progress);
- }
-
- if (count > 0)
- {
- for (b = 0; b < bpp; b++)
- average[b] = (guchar) (average[b] / count);
- }
-
- gimp_pixel_rgn_init (&dest_rgn, drawable,
- x, y, x_step, y_step, TRUE, TRUE);
- for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process (pr))
- {
- dest_row = dest_rgn.data;
- for (row = 0; row < dest_rgn.h; row++)
- {
- dest = dest_row;
- for (col = 0; col < dest_rgn.w; col++)
- {
- for (b = 0; b < bpp; b++)
- dest[b] = average[b];
- dest += dest_rgn.bpp;
- count += 1;
- }
- dest_row += dest_rgn.rowstride;
- }
- /* Update progress */
- progress += dest_rgn.w * dest_rgn.h;
- gimp_progress_update ((double) progress / (double) max_progress);
- }
- }
- }
-
- g_free (average);
-
- /* update the blurred region */
- gimp_drawable_flush (drawable);
- gimp_drawable_merge_shadow (drawable->id, TRUE);
- gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
- }
-
-
- /*
- This function operates on PixelArea, whose width and height are
- multiply of pixel width, and less than the tile size (to enhance
- its speed).
-
- If any coordinates of mask boundary is not multiply of pixel width
- (e.g. x1 % pixelwidth != 0), operates on the region whose width
- or height is the remainder.
- */
- static void
- pixelize_small (GimpDrawable *drawable,
- gint pixelwidth,
- gint tile_width)
- {
- GimpPixelRgn src_rgn, dest_rgn;
- gint bpp;
- gint x1, y1, x2, y2;
- gint progress, max_progress;
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
- 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);
-
- /* Initialize progress */
- progress = 0;
- max_progress = (x2 - x1) * (y2 - y1);
-
- bpp = drawable->bpp;
-
- area.width = (tile_width / pixelwidth) * pixelwidth;
- area.data= g_new(guchar, (glong) bpp * area.width * area.width );
-
- for(area.y = y1; area.y < y2;
- area.y += area.width - (area.y % area.width))
- {
- area.h = area.width - (area.y % area.width);
- area.h = MIN(area.h, y2 - area.y);
- for(area.x = x1; area.x < x2;
- area.x += area.width - (area.x % area.width))
- {
- area.w = area.width - (area.x % area.width);
- area.w = MIN(area.w, x2 - area.x);
-
- gimp_pixel_rgn_get_rect (&src_rgn, area.data,
- area.x, area.y, area.w, area.h);
-
- pixelize_sub(pixelwidth, bpp);
-
- gimp_pixel_rgn_set_rect (&dest_rgn, area.data,
- area.x, area.y, area.w, area.h);
-
- /* Update progress */
- progress += area.w * area.h;
- gimp_progress_update ((double) progress / (double) max_progress);
- }
- }
-
- g_free(area.data);
-
- /* update the pixelized region */
- gimp_drawable_flush (drawable);
- gimp_drawable_merge_shadow (drawable->id, TRUE);
- gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
- }
-
- /*
- This function acts on one PixelArea. Since there were so many
- nested FORs in pixelize_small(), I put a few of them here...
- */
-
- static void
- pixelize_sub (gint pixelwidth,
- gint bpp)
- {
- glong average[4]; /* bpp <= 4 */
- gint x, y, w, h;
- guchar *buf_row, *buf;
- gint row, col;
- gint rowstride;
- gint count;
- gint i;
-
- rowstride = area.w * bpp;
-
- for (y = area.y; y < area.y + area.h; y += pixelwidth - (y % pixelwidth))
- {
- h = pixelwidth - (y % pixelwidth);
- h = MIN(h, area.y + area.h - y);
- for (x = area.x; x < area.x + area.w; x += pixelwidth - (x % pixelwidth))
- {
- w = pixelwidth - (x % pixelwidth);
- w = MIN (w, area.x + area.w - x);
-
- for (i = 0; i < bpp; i++)
- average[i] = 0;
- count = 0;
-
- /* Read */
- buf_row = area.data + (y-area.y)*rowstride + (x-area.x)*bpp;
-
- for (row = 0; row < h; row++)
- {
- buf = buf_row;
- for (col = 0; col < w; col++)
- {
- for (i = 0; i < bpp; i++)
- average[i] += buf[i];
- count++;
- buf += bpp;
- }
- buf_row += rowstride;
- }
-
- /* Average */
- if (count > 0)
- {
- for (i = 0; i < bpp; i++)
- average[i] /= count;
- }
-
- /* Write */
- buf_row = area.data + (y-area.y)*rowstride + (x-area.x)*bpp;
-
- for (row = 0; row < h; row++)
- {
- buf = buf_row;
- for (col = 0; col < w; col++)
- {
- for (i = 0; i < bpp; i++)
- buf[i] = average[i];
- count++;
- buf += bpp;
- }
- buf_row += rowstride;
- }
- }
- }
- }
-