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-rw-r--r--plug-ins/common/checkerboard.c525
1 files changed, 525 insertions, 0 deletions
diff --git a/plug-ins/common/checkerboard.c b/plug-ins/common/checkerboard.c
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+++ b/plug-ins/common/checkerboard.c
@@ -0,0 +1,525 @@
+/*
+ * This is a plug-in for 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 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+
+#define PLUG_IN_PROC "plug-in-checkerboard"
+#define PLUG_IN_BINARY "checkerboard"
+#define PLUG_IN_ROLE "gimp-checkerboard"
+#define SPIN_BUTTON_WIDTH 8
+
+
+/* Variables set in dialog box */
+typedef struct data
+{
+ gboolean mode;
+ gint size;
+} CheckVals;
+
+
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+static void do_checkerboard_pattern (gint32 drawable_ID,
+ GimpPreview *preview);
+static void do_checkerboard_preview (gpointer drawable_ID,
+ GimpPreview *preview);
+static gint inblock (gint pos,
+ gint size);
+
+static gboolean checkerboard_dialog (gint32 image_ID,
+ gint32 drawable_ID);
+static void check_size_update_callback (GtkWidget *widget);
+
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+static CheckVals cvals =
+{
+ FALSE, /* mode */
+ 10 /* size */
+};
+
+MAIN ()
+
+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_INT32, "check-mode", "Check mode { REGULAR (0), PSYCHOBILY (1) }" },
+ { GIMP_PDB_INT32, "check-size", "Size of the checks" }
+ };
+
+ gimp_install_procedure (PLUG_IN_PROC,
+ N_("Create a checkerboard pattern"),
+ "More here later",
+ "Brent Burton & the Edward Blevins",
+ "Brent Burton & the Edward Blevins",
+ "1997",
+ N_("_Checkerboard (legacy)..."),
+ "RGB*, GRAY*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (args), 0,
+ args, NULL);
+
+ gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Render/Pattern");
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[1];
+ GimpRunMode run_mode;
+ gint32 image_ID;
+ gint32 drawable_ID;
+ GimpPDBStatusType status = GIMP_PDB_SUCCESS;
+
+ INIT_I18N ();
+ gegl_init (NULL, NULL);
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = status;
+
+ run_mode = param[0].data.d_int32;
+ image_ID = param[1].data.d_int32;
+ drawable_ID = param[2].data.d_drawable;
+
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ gimp_get_data (PLUG_IN_PROC, &cvals);
+ if (! checkerboard_dialog (image_ID, drawable_ID))
+ 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_PROC, &cvals);
+ break;
+
+ default:
+ break;
+ }
+
+ if (gimp_drawable_is_rgb (drawable_ID) ||
+ gimp_drawable_is_gray (drawable_ID))
+ {
+ do_checkerboard_pattern (drawable_ID, NULL);
+
+ if (run_mode != GIMP_RUN_NONINTERACTIVE)
+ gimp_displays_flush ();
+
+ if (run_mode == GIMP_RUN_INTERACTIVE)
+ gimp_set_data (PLUG_IN_PROC, &cvals, sizeof (CheckVals));
+ }
+ else
+ {
+ status = GIMP_PDB_EXECUTION_ERROR;
+ }
+
+ values[0].data.d_status = status;
+}
+
+typedef struct
+{
+ guchar fg[4];
+ guchar bg[4];
+} CheckerboardParam_t;
+
+static void
+checkerboard_func (gint x,
+ gint y,
+ guchar *dest,
+ gint bpp,
+ gpointer data)
+{
+ CheckerboardParam_t *param = (CheckerboardParam_t*) data;
+
+ gint val, xp, yp;
+ gint b;
+
+ if (cvals.mode)
+ {
+ /* Psychobilly Mode */
+ val = (inblock (x, cvals.size) != inblock (y, cvals.size));
+ }
+ 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) );
+ }
+
+ for (b = 0; b < bpp; b++)
+ dest[b] = val ? param->fg[b] : param->bg[b];
+}
+
+static void
+do_checkerboard_pattern (gint32 drawable_ID,
+ GimpPreview *preview)
+{
+ CheckerboardParam_t param;
+ GimpRGB fg, bg;
+ const Babl *format;
+ gint bpp;
+
+ gimp_context_get_background (&bg);
+ gimp_context_get_foreground (&fg);
+
+ if (gimp_drawable_is_gray (drawable_ID))
+ {
+ param.bg[0] = gimp_rgb_luminance_uchar (&bg);
+ gimp_rgba_get_uchar (&bg, NULL, NULL, NULL, param.bg + 1);
+
+ param.fg[0] = gimp_rgb_luminance_uchar (&fg);
+ gimp_rgba_get_uchar (&fg, NULL, NULL, NULL, param.fg + 3);
+
+ if (gimp_drawable_has_alpha (drawable_ID))
+ format = babl_format ("R'G'B'A u8");
+ else
+ format = babl_format ("R'G'B' u8");
+ }
+ else
+ {
+ gimp_rgba_get_uchar (&bg,
+ param.bg, param.bg + 1, param.bg + 2, param.bg + 1);
+
+ gimp_rgba_get_uchar (&fg,
+ param.fg, param.fg + 1, param.fg + 2, param.fg + 3);
+
+ if (gimp_drawable_has_alpha (drawable_ID))
+ format = babl_format ("Y'A u8");
+ else
+ format = babl_format ("Y' u8");
+ }
+
+ bpp = babl_format_get_bytes_per_pixel (format);
+
+ if (cvals.size < 1)
+ {
+ /* make size 1 to prevent division by zero */
+ cvals.size = 1;
+ }
+
+ if (preview)
+ {
+ gint x1, y1;
+ gint width, height;
+ gint i;
+ guchar *buffer;
+
+ gimp_preview_get_position (preview, &x1, &y1);
+ gimp_preview_get_size (preview, &width, &height);
+ bpp = gimp_drawable_bpp (drawable_ID);
+ buffer = g_new (guchar, width * height * bpp);
+
+ for (i = 0; i < width * height; i++)
+ {
+ checkerboard_func (x1 + i % width,
+ y1 + i / width,
+ buffer + i * bpp,
+ bpp, &param);
+ }
+
+ gimp_preview_draw_buffer (preview, buffer, width * bpp);
+ g_free (buffer);
+ }
+ else
+ {
+ GeglBuffer *buffer;
+ GeglBufferIterator *iter;
+ gint x, y, w, h;
+ gint progress_total;
+ gint progress_done = 0;
+
+ if (! gimp_drawable_mask_intersect (drawable_ID, &x, &y, &w, &h))
+ return;
+
+ progress_total = w * h;
+
+ gimp_progress_init (_("Checkerboard"));
+
+ buffer = gimp_drawable_get_shadow_buffer (drawable_ID);
+
+ iter = gegl_buffer_iterator_new (buffer,
+ GEGL_RECTANGLE (x, y, w, h), 0,
+ format,
+ GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE, 1);
+
+ while (gegl_buffer_iterator_next (iter))
+ {
+ GeglRectangle roi = iter->items[0].roi;
+ guchar *dest = iter->items[0].data;
+ guchar *d;
+ gint y1, x1;
+
+ d = dest;
+
+ for (y1 = 0; y1 < roi.height; y1++)
+ {
+ for (x1 = 0; x1 < roi.width; x1++)
+ {
+ checkerboard_func (roi.x + x1,
+ roi.y + y1,
+ d + x1 * bpp,
+ bpp, &param);
+ }
+
+ d += roi.width * bpp;
+ }
+
+ progress_done += roi.width * roi.height;
+ gimp_progress_update ((gdouble) progress_done /
+ (gdouble) progress_total);
+ }
+
+ g_object_unref (buffer);
+
+ gimp_progress_update (1.0);
+
+ gimp_drawable_merge_shadow (drawable_ID, TRUE);
+ gimp_drawable_update (drawable_ID, x, y, w, h);
+ }
+}
+
+static void
+do_checkerboard_preview (gpointer drawable_ID,
+ GimpPreview *preview)
+{
+ do_checkerboard_pattern (GPOINTER_TO_INT (drawable_ID), preview);
+}
+
+static gint
+inblock (gint pos,
+ gint size)
+{
+ static gint *in = NULL; /* initialized first time */
+ static gint len = -1;
+
+ /* avoid a FP exception */
+ if (size == 1)
+ size = 2;
+
+ if (in && len != size * size)
+ {
+ g_free (in);
+ in = NULL;
+ }
+ 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)
+ {
+ gint cell = 1; /* cell value */
+ gint i, j, k;
+
+ in = g_new (gint, len);
+
+ /* 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 gboolean
+checkerboard_dialog (gint32 image_ID,
+ gint32 drawable_ID)
+{
+ GtkWidget *dialog;
+ GtkWidget *vbox;
+ GtkWidget *hbox;
+ GtkWidget *preview;
+ GtkWidget *toggle;
+ GtkWidget *size_entry;
+ gint size, width, height;
+ GimpUnit unit;
+ gdouble xres;
+ gdouble yres;
+ gboolean run;
+
+ gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+ dialog = gimp_dialog_new (_("Checkerboard"), PLUG_IN_ROLE,
+ NULL, 0,
+ gimp_standard_help_func, PLUG_IN_PROC,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_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));
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+ gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+ gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
+ vbox, TRUE, TRUE, 0);
+ gtk_widget_show (vbox);
+
+ preview = gimp_drawable_preview_new_from_drawable_id (drawable_ID);
+ gtk_box_pack_start (GTK_BOX (vbox), preview, TRUE, TRUE, 0);
+ gtk_widget_show (preview);
+ g_signal_connect_swapped (preview, "invalidated",
+ G_CALLBACK (do_checkerboard_preview),
+ GINT_TO_POINTER (drawable_ID));
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+ gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ /* Get the image resolution and unit */
+ gimp_image_get_resolution (image_ID, &xres, &yres);
+ unit = gimp_image_get_unit (image_ID);
+
+ width = gimp_drawable_width (drawable_ID);
+ height = gimp_drawable_height (drawable_ID);
+ size = MIN (width, height);
+
+ size_entry = gimp_size_entry_new (1, unit, "%a",
+ TRUE, TRUE, FALSE, SPIN_BUTTON_WIDTH,
+ GIMP_SIZE_ENTRY_UPDATE_SIZE);
+ gtk_table_set_col_spacing (GTK_TABLE (size_entry), 0, 4);
+ gtk_table_set_col_spacing (GTK_TABLE (size_entry), 1, 4);
+ gtk_box_pack_start (GTK_BOX (hbox), size_entry, FALSE, FALSE, 0);
+ gtk_widget_show (size_entry);
+
+ /* set the unit back to pixels, since most times we will want pixels */
+ gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (size_entry), GIMP_UNIT_PIXEL);
+
+ /* set the resolution to the image resolution */
+ gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (size_entry), 0, xres, TRUE);
+
+ /* set the size (in pixels) that will be treated as 0% and 100% */
+ gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_entry), 0, 0.0, size);
+
+ /* set upper and lower limits (in pixels) */
+ gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (size_entry), 0,
+ 1.0, size);
+
+ /* initialize the values */
+ gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (size_entry), 0, cvals.size);
+
+ /* attach labels */
+ gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (size_entry),
+ _("_Size:"), 1, 0, 0.0);
+
+ g_signal_connect (size_entry, "value-changed",
+ G_CALLBACK (check_size_update_callback),
+ &cvals.size);
+ g_signal_connect_swapped (size_entry, "value-changed",
+ G_CALLBACK (gimp_preview_invalidate),
+ preview);
+
+ toggle = gtk_check_button_new_with_mnemonic (_("_Psychobilly"));
+ gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cvals.mode);
+ gtk_widget_show (toggle);
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_toggle_button_update),
+ &cvals.mode);
+ g_signal_connect_swapped (toggle, "toggled",
+ 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;
+}
+
+static void
+check_size_update_callback (GtkWidget *widget)
+{
+ cvals.size = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
+}
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