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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- *
- * 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 <glib.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "drawable.h"
- #include "gdisplay.h"
- #include "gimpui.h"
- #include "histogram_tool.h"
-
- #include "libgimp/gimpintl.h"
- #include "libgimp/gimpmath.h"
-
- #define TEXT_WIDTH 45
- #define GRADIENT_HEIGHT 15
-
- /* the histogram structures */
-
- typedef struct _HistogramTool HistogramTool;
-
- struct _HistogramTool
- {
- gint x, y; /* coords for last mouse click */
- };
-
- /* the histogram tool options */
- static ToolOptions * histogram_tool_options = NULL;
-
- /* the histogram tool dialog */
- static HistogramToolDialog * histogram_tool_dialog = NULL;
-
- /* histogram_tool action functions */
- static void histogram_tool_control (Tool *, ToolAction, gpointer);
-
- static HistogramToolDialog * histogram_tool_dialog_new (void);
-
- static void histogram_tool_close_callback (GtkWidget *, gpointer);
- static void histogram_tool_channel_callback (GtkWidget *, gpointer);
- static void histogram_tool_gradient_draw (GtkWidget *, gint);
-
- static void histogram_tool_dialog_update (HistogramToolDialog *,
- gint, gint);
-
- /* histogram_tool machinery */
-
- void
- histogram_tool_histogram_range (HistogramWidget *widget,
- gint start,
- gint end,
- gpointer data)
- {
- HistogramToolDialog *htd;
- gdouble pixels;
- gdouble count;
-
- htd = (HistogramToolDialog *) data;
-
- if (htd == NULL || htd->hist == NULL ||
- gimp_histogram_nchannels(htd->hist) <= 0)
- return;
-
- pixels = gimp_histogram_get_count (htd->hist, 0, 255);
- count = gimp_histogram_get_count (htd->hist, start, end);
-
- htd->mean = gimp_histogram_get_mean (htd->hist, htd->channel,
- start, end);
- htd->std_dev = gimp_histogram_get_std_dev (htd->hist, htd->channel,
- start, end);
- htd->median = gimp_histogram_get_median (htd->hist, htd->channel,
- start, end);
- htd->pixels = pixels;
- htd->count = count;
- htd->percentile = count / pixels;
-
- if (htd->shell)
- histogram_tool_dialog_update (htd, start, end);
- }
-
- static void
- histogram_tool_dialog_update (HistogramToolDialog *htd,
- gint start,
- gint end)
- {
- gchar text[12];
-
- /* mean */
- g_snprintf (text, sizeof (text), "%3.1f", htd->mean);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[0]), text);
-
- /* std dev */
- g_snprintf (text, sizeof (text), "%3.1f", htd->std_dev);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[1]), text);
-
- /* median */
- g_snprintf (text, sizeof (text), "%3.1f", htd->median);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[2]), text);
-
- /* pixels */
- g_snprintf (text, sizeof (text), "%8.1f", htd->pixels);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[3]), text);
-
- /* intensity */
- if (start == end)
- g_snprintf (text, sizeof (text), "%d", start);
- else
- g_snprintf (text, sizeof (text), "%d..%d", start, end);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[4]), text);
-
- /* count */
- g_snprintf (text, sizeof (text), "%8.1f", htd->count);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[5]), text);
-
- /* percentile */
- g_snprintf (text, sizeof (text), "%2.2f", htd->percentile * 100);
- gtk_label_set_text (GTK_LABEL (htd->info_labels[6]), text);
- }
-
- /* histogram_tool action functions */
-
- static void
- histogram_tool_control (Tool *tool,
- ToolAction action,
- gpointer gdisp_ptr)
- {
- switch (action)
- {
- case PAUSE:
- break;
-
- case RESUME:
- break;
-
- case HALT:
- if (histogram_tool_dialog)
- histogram_tool_close_callback (NULL, (gpointer) histogram_tool_dialog);
- break;
-
- default:
- break;
- }
- }
-
- Tool *
- tools_new_histogram_tool (void)
- {
- Tool * tool;
- HistogramTool * private;
-
- /* The tool options */
- if (! histogram_tool_options)
- {
- histogram_tool_options = tool_options_new (_("Histogram"));
- tools_register (HISTOGRAM, histogram_tool_options);
- }
-
- tool = tools_new_tool (HISTOGRAM);
- private = g_new0 (HistogramTool, 1);
-
- tool->scroll_lock = TRUE; /* Disallow scrolling */
- tool->preserve = FALSE; /* Don't preserve on drawable change */
-
- tool->private = (void *) private;
-
- tool->control_func = histogram_tool_control;
-
- return tool;
- }
-
- void
- tools_free_histogram_tool (Tool *tool)
- {
- HistogramTool * hist;
-
- hist = (HistogramTool *) tool->private;
-
- /* Close the histogram dialog */
- if (histogram_tool_dialog)
- histogram_tool_close_callback (NULL, (gpointer) histogram_tool_dialog);
-
- g_free (hist);
- }
-
- void
- histogram_tool_initialize (GDisplay *gdisp)
- {
- PixelRegion PR;
-
- if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
- {
- g_message (_("Histogram does not operate on indexed drawables."));
- return;
- }
-
- /* The histogram_tool dialog */
- if (!histogram_tool_dialog)
- histogram_tool_dialog = histogram_tool_dialog_new ();
- else if (!GTK_WIDGET_VISIBLE (histogram_tool_dialog->shell))
- gtk_widget_show (histogram_tool_dialog->shell);
-
- histogram_tool_dialog->drawable = gimage_active_drawable (gdisp->gimage);
- histogram_tool_dialog->color = drawable_color (histogram_tool_dialog->drawable);
-
- /* hide or show the channel menu based on image type */
- if (histogram_tool_dialog->color)
- gtk_widget_show (histogram_tool_dialog->channel_menu);
- else
- gtk_widget_hide (histogram_tool_dialog->channel_menu);
-
- /* calculate the histogram */
- pixel_region_init (&PR, drawable_data (histogram_tool_dialog->drawable), 0, 0,
- drawable_width (histogram_tool_dialog->drawable),
- drawable_height (histogram_tool_dialog->drawable),
- FALSE);
- gimp_histogram_calculate (histogram_tool_dialog->hist, &PR, NULL);
-
- histogram_widget_update (histogram_tool_dialog->histogram,
- histogram_tool_dialog->hist);
- histogram_widget_range (histogram_tool_dialog->histogram, 0, 255);
- }
-
- /***************************/
- /* Histogram Tool dialog */
- /***************************/
-
- static HistogramToolDialog *
- histogram_tool_dialog_new (void)
- {
- HistogramToolDialog *htd;
- GtkWidget *main_vbox;
- GtkWidget *hbox;
- GtkWidget *vbox;
- GtkWidget *grad_hbox;
- GtkWidget *frame;
- GtkWidget *table;
- GtkWidget *label;
- GtkWidget *option_menu;
- gint i;
- gint x, y;
-
- static gchar * histogram_info_names[] =
- {
- N_("Mean:"),
- N_("Std Dev:"),
- N_("Median:"),
- N_("Pixels:"),
- N_("Intensity:"),
- N_("Count:"),
- N_("Percentile:")
- };
-
- htd = g_new (HistogramToolDialog, 1);
- htd->channel = GIMP_HISTOGRAM_VALUE;
- htd->hist = gimp_histogram_new ();
-
- /* The shell and main vbox */
- htd->shell = gimp_dialog_new (_("Histogram"), "histogram",
- tools_help_func,
- tool_info[HISTOGRAM].private_tip,
- GTK_WIN_POS_NONE,
- FALSE, TRUE, FALSE,
-
- _("Close"), histogram_tool_close_callback,
- htd, NULL, NULL, TRUE, TRUE,
-
- NULL);
-
- main_vbox = gtk_vbox_new (FALSE, 4);
- gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 4);
- gtk_container_add (GTK_CONTAINER (GTK_DIALOG (htd->shell)->vbox), main_vbox);
-
- hbox = gtk_hbox_new (TRUE, 0);
- gtk_box_pack_start (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
-
- vbox = gtk_vbox_new (FALSE, 4);
- gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
-
- /* The option menu for selecting channels */
- htd->channel_menu = gtk_hbox_new (FALSE, 6);
- gtk_box_pack_start (GTK_BOX (vbox), htd->channel_menu, FALSE, FALSE, 0);
-
- label = gtk_label_new (_("Information on Channel:"));
- gtk_box_pack_start (GTK_BOX (htd->channel_menu), label, FALSE, FALSE, 0);
- gtk_widget_show (label);
-
- option_menu = gimp_option_menu_new2
- (FALSE, histogram_tool_channel_callback,
- htd, (gpointer) htd->channel,
-
- _("Value"), (gpointer) GIMP_HISTOGRAM_VALUE, NULL,
- _("Red"), (gpointer) GIMP_HISTOGRAM_RED, NULL,
- _("Green"), (gpointer) GIMP_HISTOGRAM_GREEN, NULL,
- _("Blue"), (gpointer) GIMP_HISTOGRAM_BLUE, NULL,
-
- NULL);
- gtk_box_pack_start (GTK_BOX (htd->channel_menu), option_menu, FALSE, FALSE, 0);
- gtk_widget_show (option_menu);
-
- gtk_widget_show (htd->channel_menu);
-
- /* The histogram tool histogram */
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
- gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
-
- htd->histogram = histogram_widget_new (HISTOGRAM_WIDTH, HISTOGRAM_HEIGHT);
- gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET(htd->histogram));
-
- gtk_signal_connect (GTK_OBJECT (htd->histogram), "range_changed",
- GTK_SIGNAL_FUNC (histogram_tool_histogram_range),
- htd);
-
- gtk_widget_show (GTK_WIDGET (htd->histogram));
- gtk_widget_show (frame);
-
- /* The gradient below the histogram */
- grad_hbox = gtk_hbox_new (TRUE, 0);
- gtk_box_pack_start (GTK_BOX (vbox), grad_hbox, FALSE, FALSE, 0);
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
- gtk_box_pack_start (GTK_BOX (grad_hbox), frame, FALSE, FALSE, 0);
-
- htd->gradient = gtk_preview_new (GTK_PREVIEW_COLOR);
- gtk_preview_size (GTK_PREVIEW (htd->gradient),
- HISTOGRAM_WIDTH, GRADIENT_HEIGHT);
- gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET(htd->gradient));
- gtk_widget_show (htd->gradient);
- gtk_widget_show (frame);
- gtk_widget_show (grad_hbox);
- histogram_tool_gradient_draw (htd->gradient, GIMP_HISTOGRAM_VALUE);
-
- gtk_widget_show (vbox);
- gtk_widget_show (hbox);
-
- /* The table containing histogram information */
- table = gtk_table_new (4, 4, TRUE);
- gtk_table_set_col_spacings (GTK_TABLE (table), 6);
- gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
-
- /* the labels for histogram information */
- for (i = 0; i < 7; i++)
- {
- y = (i % 4);
- x = (i / 4) * 2;
-
- label = gtk_label_new (gettext(histogram_info_names[i]));
- gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
- gtk_table_attach (GTK_TABLE (table), label, x, x + 1, y, y + 1,
- GTK_FILL, GTK_FILL, 2, 2);
- gtk_widget_show (label);
-
- htd->info_labels[i] = gtk_label_new ("0");
- gtk_misc_set_alignment (GTK_MISC (htd->info_labels[i]), 0.0, 0.5);
- gtk_table_attach (GTK_TABLE (table), htd->info_labels[i],
- x + 1, x + 2, y, y + 1,
- GTK_FILL, GTK_FILL, 2, 2);
- gtk_widget_show (htd->info_labels[i]);
- }
-
- gtk_widget_show (table);
-
- gtk_widget_show (main_vbox);
- gtk_widget_show (htd->shell);
-
- return htd;
- }
-
- static void
- histogram_tool_close_callback (GtkWidget *widget,
- gpointer data)
- {
- HistogramToolDialog *htd;
-
- htd = (HistogramToolDialog *) data;
-
- gimp_dialog_hide (htd->shell);
-
- active_tool->gdisp_ptr = NULL;
- active_tool->drawable = NULL;
- }
-
- static void
- histogram_tool_channel_callback (GtkWidget *widget,
- gpointer data)
- {
- HistogramToolDialog *htd;
-
- htd = (HistogramToolDialog *) data;
-
- gimp_menu_item_update (widget, &htd->channel);
-
- histogram_widget_channel (htd->histogram, htd->channel);
- histogram_tool_gradient_draw (htd->gradient, htd->channel);
- }
-
- static void
- histogram_tool_gradient_draw (GtkWidget *gradient,
- gint channel)
- {
- guchar buf[HISTOGRAM_WIDTH * 3];
- guchar r, g, b;
- gint i;
-
- r = g = b = 0;
- switch (channel)
- {
- case GIMP_HISTOGRAM_VALUE:
- case GIMP_HISTOGRAM_ALPHA: r = g = b = 1;
- break;
- case GIMP_HISTOGRAM_RED: r = 1;
- break;
- case GIMP_HISTOGRAM_GREEN: g = 1;
- break;
- case GIMP_HISTOGRAM_BLUE: b = 1;
- break;
- default:
- g_warning ("unknown channel type, can't happen\n");
- break;
- }
-
- for (i = 0; i < HISTOGRAM_WIDTH; i++)
- {
- buf[3*i+0] = i*r;
- buf[3*i+1] = i*g;
- buf[3*i+2] = i*b;
- }
-
- for (i = 0; i < GRADIENT_HEIGHT; i++)
- gtk_preview_draw_row (GTK_PREVIEW (gradient),
- buf, 0, i, HISTOGRAM_WIDTH);
-
- gtk_widget_queue_draw (gradient);
- }
-
-
-