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- /*
- * This is a plug-in for the GIMP.
- *
- * Copyright (C) 1997 Brent Burton & the Edward Blevins
- *
- * 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 <stdio.h>
- #include <stdlib.h>
-
- #include <gtk/gtk.h>
-
- #include <libgimp/gimp.h>
- #include <libgimp/gimpui.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- /* Variables set in dialog box */
- typedef struct data
- {
- gint mode;
- gint size;
- } CheckVals;
-
- typedef struct
- {
- gint run;
- } CheckInterface;
-
- static CheckInterface cint =
- {
- FALSE
- };
-
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
-
- static void check (GimpDrawable *drawable);
- static gint inblock (gint pos,
- gint size);
-
- static gint check_dialog (void);
- static void check_ok_callback (GtkWidget *widget,
- gpointer data);
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- static CheckVals cvals =
- {
- 0,
- 10
- };
-
- 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, "check_mode", "Regular or Physcobilly" },
- { GIMP_PDB_INT32, "check_size", "Size of the checks" }
- };
- static gint nargs = sizeof (args) / sizeof (args[0]);
-
- gimp_install_procedure ("plug_in_checkerboard",
- "Adds a checkerboard pattern to an image",
- "More here later",
- "Brent Burton & the Edward Blevins",
- "Brent Burton & the Edward Blevins",
- "1997",
- N_("<Image>/Filters/Render/Pattern/Checkerboard..."),
- "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;
-
- INIT_I18N_UI();
-
- 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;
-
- drawable = gimp_drawable_get (param[2].data.d_drawable);
-
- switch (run_mode)
- {
- case GIMP_RUN_INTERACTIVE:
- gimp_get_data ("plug_in_checkerboard", &cvals);
- if (! check_dialog())
- {
- gimp_drawable_detach (drawable);
- return;
- }
- break;
-
- case GIMP_RUN_NONINTERACTIVE:
- if (nparams != 5)
- status = GIMP_PDB_CALLING_ERROR;
- if (status == GIMP_PDB_SUCCESS)
- {
- cvals.mode = param[3].data.d_int32;
- cvals.size = param[4].data.d_int32;
- }
- break;
-
- case GIMP_RUN_WITH_LAST_VALS:
- gimp_get_data ("plug_in_checkerboard", &cvals);
- break;
-
- default:
- break;
- }
-
- if (gimp_drawable_is_rgb (drawable->id) ||
- gimp_drawable_is_gray (drawable->id))
- {
- gimp_progress_init (_("Adding Checkerboard..."));
-
- check (drawable);
-
- if (run_mode != GIMP_RUN_NONINTERACTIVE)
- gimp_displays_flush ();
-
- if (run_mode == GIMP_RUN_INTERACTIVE)
- gimp_set_data ("plug_in_checkerboard", &cvals, sizeof (CheckVals));
- }
- else
- {
- status = GIMP_PDB_EXECUTION_ERROR;
- }
-
- values[0].data.d_status = status;
-
- gimp_drawable_detach (drawable);
- }
-
-
- static void
- check (GimpDrawable *drawable)
- {
- GimpPixelRgn dest_rgn;
- guchar *dest_row;
- guchar *dest;
- gint row, col;
- gint progress, max_progress;
- gint x1, y1, x2, y2, x, y;
- guchar fg[4],bg[4];
- gint bp;
- gpointer pr;
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
- gimp_pixel_rgn_init (&dest_rgn, drawable,
- x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
-
- progress = 0;
- max_progress = (x2 - x1) * (y2 - y1);
-
- /* Get the foreground and background colors */
-
- switch ( gimp_drawable_type (drawable->id) )
- {
- case GIMP_RGBA_IMAGE:
- fg[3] = 255;
- bg[3] = 255;
- case GIMP_RGB_IMAGE:
- gimp_palette_get_foreground (&fg[0], &fg[1], &fg[2]);
- gimp_palette_get_background (&bg[0], &bg[1], &bg[2]);
- break;
- case GIMP_GRAYA_IMAGE:
- fg[1] = 255;
- bg[1] = 255;
- case GIMP_GRAY_IMAGE:
- fg[0] = 255;
- bg[0] = 0;
- break;
- default:
- break;
- }
-
- for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process (pr))
- {
- y = dest_rgn.y;
-
- dest_row = dest_rgn.data;
- for ( row = 0; row < dest_rgn.h; row++)
- {
- dest = dest_row;
- x = dest_rgn.x;
-
- for (col = 0; col < dest_rgn.w; col++)
- {
- gint val, xp, yp;
-
- if (cvals.mode)
- {
- /* Psychobilly Mode */
- val =
- (inblock (x, cvals.size) == inblock (y, cvals.size)) ? 0 : 1;
- }
- else
- {
- /* Normal, regular checkerboard mode.
- * Determine base factor (even or odd) of block
- * this x/y position is in.
- */
- xp = x/cvals.size;
- yp = y/cvals.size;
- /* if both even or odd, color sqr */
- val = ( (xp&1) == (yp&1) ) ? 0 : 1;
- }
- for (bp = 0; bp < dest_rgn.bpp; bp++)
- dest[bp] = val ? fg[bp] : bg[bp];
- dest += dest_rgn.bpp;
- x++;
- }
- dest_row += dest_rgn.rowstride;
- y++;
- }
- progress += dest_rgn.w * dest_rgn.h;
- gimp_progress_update ((double) progress / (double) max_progress);
- }
- gimp_drawable_flush (drawable);
- gimp_drawable_merge_shadow (drawable->id, TRUE);
- gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
- }
-
- static gint
- inblock (gint pos,
- gint size)
- {
- static gint *in = NULL; /* initialized first time */
- gint i,j,k, len;
-
- /* avoid a FP exception */
- if (size == 1)
- size = 2;
-
- len = size*size;
- /*
- * Initialize the array; since we'll be called thousands of
- * times with the same size value, precompute the array.
- */
- if (in == NULL)
- {
- in = g_new (gint, len);
- if (in == NULL)
- {
- return 0;
- }
- else
- {
- int cell = 1; /* cell value */
- /*
- * i is absolute index into in[]
- * j is current number of blocks to fill in with a 1 or 0.
- * k is just counter for the j cells.
- */
- i=0;
- for (j=1; j<=size; j++ )
- { /* first half */
- for (k=0; k<j; k++ )
- {
- in[i++] = cell;
- }
- cell = !cell;
- }
- for ( j=size-1; j>=1; j--)
- { /* second half */
- for (k=0; k<j; k++ )
- {
- in[i++] = cell;
- }
- cell = !cell;
- }
- }
- }
-
- /* place pos within 0..(len-1) grid and return the value. */
- return in[ pos % (len-1) ];
- }
-
- static gint
- check_dialog (void)
- {
- GtkWidget *dlg;
- GtkWidget *frame;
- GtkWidget *vbox;
- GtkWidget *toggle;
- GtkWidget *table;
- GtkObject *size_data;
-
- gimp_ui_init ("checkerboard", FALSE);
-
- dlg = gimp_dialog_new (_("Checkerboard"), "checkerboard",
- gimp_standard_help_func, "filters/checkerboard.html",
- GTK_WIN_POS_MOUSE,
- FALSE, TRUE, FALSE,
-
- _("OK"), check_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);
-
- vbox = gtk_vbox_new (FALSE, 4);
- gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
- gtk_container_add (GTK_CONTAINER (frame), vbox);
-
- toggle = gtk_check_button_new_with_label (_("Psychobilly"));
- gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
- gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
- GTK_SIGNAL_FUNC (gimp_toggle_button_update),
- &cvals.mode);
- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cvals.mode);
- gtk_widget_show (toggle);
-
- table = gtk_table_new (1, 3, FALSE);
- gtk_table_set_col_spacings (GTK_TABLE (table), 4);
- gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
- gtk_widget_show (table);
-
- size_data = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
- _("Check Size:"), 200, 0,
- cvals.size, 1, 400, 1, 10, 0,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_signal_connect (GTK_OBJECT (size_data), "value_changed",
- GTK_SIGNAL_FUNC (gimp_int_adjustment_update),
- &cvals.size);
-
- gtk_widget_show (vbox);
- gtk_widget_show (frame);
- gtk_widget_show (dlg);
-
- gtk_main ();
- gdk_flush ();
-
- return cint.run;
- }
-
- static void
- check_ok_callback (GtkWidget *widget,
- gpointer data)
- {
- cint.run = TRUE;
-
- gtk_widget_destroy (GTK_WIDGET (data));
- }
-