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-rw-r--r--plug-ins/common/max-rgb.c373
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diff --git a/plug-ins/common/max-rgb.c b/plug-ins/common/max-rgb.c
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+/* max_rgb.c -- This is a plug-in for GIMP
+ * Author: Shuji Narazaki <narazaki@InetQ.or.jp>
+ * Time-stamp: <2000-02-08 16:26:24 yasuhiro>
+ * Version: 0.35
+ *
+ * Copyright (C) 1997 Shuji Narazaki <narazaki@InetQ.or.jp>
+ *
+ * May 2000 - tim copperfield [timecop@japan.co.jp]
+ *
+ * Added a preview mode. After adding preview mode realised just exactly
+ * how useless this plugin is :)
+ *
+ * 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-max-rgb"
+#define PLUG_IN_BINARY "max-rgb"
+#define PLUG_IN_ROLE "gimp-max-rgb"
+
+
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+static GimpPDBStatusType main_function (GimpDrawable *drawable,
+ GimpPreview *preview);
+
+static gint max_rgb_dialog (GimpDrawable *drawable);
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+enum
+{
+ MIN_CHANNELS = 0,
+ MAX_CHANNELS = 1
+};
+
+typedef struct
+{
+ gint max_p;
+} ValueType;
+
+static ValueType pvals =
+{
+ MAX_CHANNELS
+};
+
+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 (not used)" },
+ { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
+ { GIMP_PDB_INT32, "max-p", "{ MINIMIZE (0), MAXIMIZE (1) }" }
+ };
+
+ gimp_install_procedure (PLUG_IN_PROC,
+ N_("Reduce image to pure red, green, and blue"),
+ "There's no help yet.",
+ "Shuji Narazaki (narazaki@InetQ.or.jp)",
+ "Shuji Narazaki",
+ "May 2000",
+ N_("Maxim_um RGB..."),
+ "RGB*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (args), 0,
+ args, NULL);
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ GimpDrawable *drawable;
+ static GimpParam values[1];
+ GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
+ GimpRunMode run_mode;
+
+ run_mode = param[0].data.d_int32;
+ drawable = gimp_drawable_get (param[2].data.d_drawable);
+
+ INIT_I18N ();
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = status;
+
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ gimp_get_data (PLUG_IN_PROC, &pvals);
+ /* Since a channel might be selected, we must check whether RGB or not. */
+ if (!gimp_drawable_is_rgb (drawable->drawable_id))
+ {
+ g_message (_("Can only operate on RGB drawables."));
+ return;
+ }
+ if (! max_rgb_dialog (drawable))
+ return;
+ break;
+ case GIMP_RUN_NONINTERACTIVE:
+ /* You must copy the values of parameters to pvals or dialog variables. */
+ pvals.max_p = param[3].data.d_int32;
+ break;
+ case GIMP_RUN_WITH_LAST_VALS:
+ gimp_get_data (PLUG_IN_PROC, &pvals);
+ break;
+ }
+
+ status = main_function (drawable, NULL);
+
+ if (run_mode != GIMP_RUN_NONINTERACTIVE)
+ gimp_displays_flush ();
+ if (run_mode == GIMP_RUN_INTERACTIVE && status == GIMP_PDB_SUCCESS)
+ gimp_set_data (PLUG_IN_PROC, &pvals, sizeof (ValueType));
+
+ values[0].data.d_status = status;
+}
+
+typedef struct
+{
+ gint init_value;
+ gint flag;
+ gboolean has_alpha;
+} MaxRgbParam_t;
+
+static void
+max_rgb_func (const guchar *src,
+ guchar *dest,
+ gint bpp,
+ gpointer data)
+{
+ MaxRgbParam_t *param = (MaxRgbParam_t*) data;
+ gint ch, max_ch = 0;
+ guchar max, tmp_value;
+
+ max = param->init_value;
+ for (ch = 0; ch < 3; ch++)
+ if (param->flag * max <= param->flag * (tmp_value = (*src++)))
+ {
+ if (max == tmp_value)
+ {
+ max_ch += 1 << ch;
+ }
+ else
+ {
+ max_ch = 1 << ch; /* clear memories of old channels */
+ max = tmp_value;
+ }
+ }
+
+ dest[0] = (max_ch & (1 << 0)) ? max : 0;
+ dest[1] = (max_ch & (1 << 1)) ? max : 0;
+ dest[2] = (max_ch & (1 << 2)) ? max : 0;
+ if (param->has_alpha)
+ dest[3] = *src;
+}
+
+static GimpPDBStatusType
+main_function (GimpDrawable *drawable,
+ GimpPreview *preview)
+{
+ MaxRgbParam_t param;
+
+ param.init_value = (pvals.max_p > 0) ? 0 : 255;
+ param.flag = (0 < pvals.max_p) ? 1 : -1;
+ param.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
+
+ if (preview)
+ {
+ gint i;
+ guchar *buffer;
+ guchar *src;
+ gint width, height, bpp;
+
+ src = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
+ &width, &height, &bpp);
+
+ buffer = g_new (guchar, width * height * bpp);
+
+ for (i = 0; i < width * height; i++)
+ {
+ max_rgb_func (src + i * bpp,
+ buffer + i * bpp,
+ bpp,
+ &param);
+ }
+
+ gimp_preview_draw_buffer (preview, buffer, width * bpp);
+ g_free (buffer);
+ g_free (src);
+ }
+ else
+ {
+ GimpPixelRgn srcPR, destPR;
+ gint x1, y1, x2, y2;
+ gpointer pr;
+ gint total_area;
+ gint area_so_far;
+ gint count;
+
+ gimp_progress_init (_("Max RGB"));
+
+ gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
+
+ total_area = (x2 - x1) * (y2 - y1);
+ area_so_far = 0;
+
+ if (total_area <= 0)
+ goto out;
+
+ /* Initialize the pixel regions. */
+ gimp_pixel_rgn_init (&srcPR, drawable, x1, y1, (x2 - x1), (y2 - y1),
+ FALSE, FALSE);
+ gimp_pixel_rgn_init (&destPR, drawable, x1, y1, (x2 - x1), (y2 - y1),
+ TRUE, TRUE);
+
+ for (pr = gimp_pixel_rgns_register (2, &srcPR, &destPR), count = 0;
+ pr != NULL;
+ pr = gimp_pixel_rgns_process (pr), count++)
+ {
+ const guchar *src = srcPR.data;
+ guchar *dest = destPR.data;
+ gint row;
+
+ for (row = 0; row < srcPR.h; row++)
+ {
+ const guchar *s = src;
+ guchar *d = dest;
+ gint pixels = srcPR.w;
+
+ while (pixels--)
+ {
+ max_rgb_func (s, d, srcPR.bpp, &param);
+
+ s += srcPR.bpp;
+ d += destPR.bpp;
+ }
+
+ src += srcPR.rowstride;
+ dest += destPR.rowstride;
+ }
+
+ area_so_far += srcPR.w * srcPR.h;
+
+ if ((count % 16) == 0)
+ gimp_progress_update ((gdouble) area_so_far / (gdouble) total_area);
+ }
+
+ /* update the processed region */
+ gimp_drawable_flush (drawable);
+ gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
+ gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
+
+ out:
+ gimp_drawable_detach (drawable);
+ }
+
+ return GIMP_PDB_SUCCESS;
+}
+
+
+/* dialog stuff */
+static gint
+max_rgb_dialog (GimpDrawable *drawable)
+{
+ GtkWidget *dialog;
+ GtkWidget *main_vbox;
+ GtkWidget *preview;
+ GtkWidget *frame;
+ GtkWidget *max;
+ GtkWidget *min;
+ gboolean run;
+
+ gimp_ui_init (PLUG_IN_BINARY, TRUE);
+
+ dialog = gimp_dialog_new (_("Maximum RGB Value"), 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));
+
+ main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+ gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
+ gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
+ main_vbox, TRUE, TRUE, 0);
+ gtk_widget_show (main_vbox);
+
+ preview = gimp_zoom_preview_new_from_drawable_id (drawable->drawable_id);
+ gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
+ gtk_widget_show (preview);
+
+ g_signal_connect_swapped (preview, "invalidated",
+ G_CALLBACK (main_function),
+ drawable);
+
+ frame = gimp_int_radio_group_new (FALSE, NULL,
+ G_CALLBACK (gimp_radio_button_update),
+ &pvals.max_p, pvals.max_p,
+
+ _("_Hold the maximal channels"),
+ MAX_CHANNELS, &max,
+
+ _("Ho_ld the minimal channels"),
+ MIN_CHANNELS, &min,
+
+ NULL);
+
+ g_signal_connect_swapped (max, "toggled",
+ G_CALLBACK (gimp_preview_invalidate),
+ preview);
+ g_signal_connect_swapped (min, "toggled",
+ G_CALLBACK (gimp_preview_invalidate),
+ preview);
+
+ gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ gtk_widget_show (dialog);
+
+ run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
+
+ gtk_widget_destroy (dialog);
+
+ return run;
+}
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