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gimp/app/tools/color_picker.c

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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 <stdlib.h>
#include <stdio.h>
#include "appenv.h"
#include "actionarea.h"
#include "color_picker.h"
#include "draw_core.h"
#include "drawable.h"
#include "gdisplay.h"
#include "cursorutil.h"
#include "info_dialog.h"
#include "palette.h"
#include "tool_options_ui.h"
#include "tools.h"
#include "gimprc.h"
#include "libgimp/gimpintl.h"
/* maximum information buffer size */
#define MAX_INFO_BUF 8
/* the color picker structures */
typedef struct _ColorPickerOptions ColorPickerOptions;
struct _ColorPickerOptions
{
ToolOptions tool_options;
int sample_merged;
int sample_merged_d;
GtkWidget *sample_merged_w;
int sample_average;
int sample_average_d;
GtkWidget *sample_average_w;
double average_radius;
double average_radius_d;
GtkObject *average_radius_w;
};
typedef struct _ColourPickerTool ColourPickerTool;
struct _ColourPickerTool
{
DrawCore * core; /* Core select object */
int centerx; /* starting x coord */
int centery; /* starting y coord */
};
/* the color picker tool options */
static ColorPickerOptions * color_picker_options = NULL;
/* the color value */
int col_value[5] = { 0, 0, 0, 0, 0 };
/* the color picker dialog */
static GimpDrawable * active_drawable;
static int update_type;
static int sample_type;
static InfoDialog * color_picker_info = NULL;
static char red_buf [MAX_INFO_BUF];
static char green_buf [MAX_INFO_BUF];
static char blue_buf [MAX_INFO_BUF];
static char alpha_buf [MAX_INFO_BUF];
static char index_buf [MAX_INFO_BUF];
static char gray_buf [MAX_INFO_BUF];
static char hex_buf [MAX_INFO_BUF];
/* local function prototypes */
static void color_picker_button_press (Tool *, GdkEventButton *, gpointer);
static void color_picker_button_release (Tool *, GdkEventButton *, gpointer);
static void color_picker_motion (Tool *, GdkEventMotion *, gpointer);
static void color_picker_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void color_picker_control (Tool *, int, void *);
static void color_picker_info_window_close_callback (GtkWidget *, gpointer);
static void color_picker_info_update (Tool *, int);
/* functions */
static void
color_picker_options_reset (void)
{
ColorPickerOptions *options = color_picker_options;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->sample_merged_w),
options->sample_merged_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->sample_average_w),
options->sample_average_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->average_radius_w),
options->average_radius_d);
}
static ColorPickerOptions *
color_picker_options_new (void)
{
ColorPickerOptions *options;
GtkWidget *vbox;
GtkWidget *abox;
GtkWidget *table;
GtkWidget *label;
GtkWidget *scale;
/* the new color picker tool options structure */
options = (ColorPickerOptions *) g_malloc (sizeof (ColorPickerOptions));
tool_options_init ((ToolOptions *) options,
N_("Color Picker Options"),
color_picker_options_reset);
options->sample_merged = options->sample_merged_d = FALSE;
options->sample_average = options->sample_average_d = FALSE;
options->average_radius = options->average_radius_d = 1.0;
/* the main vbox */
vbox = options->tool_options.main_vbox;
/* the sample merged toggle button */
options->sample_merged_w =
gtk_check_button_new_with_label (_("Sample Merged"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->sample_merged_w),
options->sample_merged_d);
gtk_box_pack_start (GTK_BOX (vbox), options->sample_merged_w, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (options->sample_merged_w), "toggled",
(GtkSignalFunc) tool_options_toggle_update,
&options->sample_merged);
gtk_widget_show (options->sample_merged_w);
/* the sample average options */
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
options->sample_average_w =
gtk_check_button_new_with_label (_("Sample Average"));
gtk_table_attach (GTK_TABLE (table), options->sample_average_w, 0, 1, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->sample_average_w),
options->sample_average_d);
gtk_signal_connect (GTK_OBJECT (options->sample_average_w), "toggled",
(GtkSignalFunc) tool_options_toggle_update,
&options->sample_average);
gtk_widget_show (options->sample_average_w);
label = gtk_label_new (_("Radius:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
/* the feather radius scale */
abox = gtk_alignment_new (0.5, 1.0, 1.0, 0.0);
gtk_table_attach (GTK_TABLE (table), abox, 1, 2, 0, 2,
GTK_EXPAND | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (abox);
options->average_radius_w =
gtk_adjustment_new (options->average_radius_d, 1.0, 15.0, 2.0, 2.0, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->average_radius_w));
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_container_add (GTK_CONTAINER (abox), scale);
gtk_widget_set_sensitive (scale, options->sample_average_d);
gtk_object_set_data (GTK_OBJECT (options->sample_average_w), "set_sensitive",
scale);
gtk_widget_set_sensitive (label, options->sample_average_d);
gtk_object_set_data (GTK_OBJECT (scale), "set_sensitive",
label);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (options->average_radius_w), "value_changed",
(GtkSignalFunc) tool_options_double_adjustment_update,
&options->average_radius);
gtk_widget_show (scale);
gtk_widget_show (table);
return options;
}
static void
color_picker_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay * gdisp;
ColourPickerTool *cp_tool;
int x, y;
static ActionAreaItem action_items[] =
{
{ N_("Close"), color_picker_info_window_close_callback, NULL, NULL },
};
gdisp = (GDisplay *) gdisp_ptr;
cp_tool = (ColourPickerTool *) tool->private;
/* If this is the first invocation of the tool, or a different gdisplay,
* create (or recreate) the info dialog...
*/
if (tool->state == INACTIVE || gdisp_ptr != tool->gdisp_ptr ||
active_drawable != gimage_active_drawable (gdisp->gimage))
{
/* if the dialog exists, free it */
if (color_picker_info)
info_dialog_free (color_picker_info);
color_picker_info = info_dialog_new (_("Color Picker"));
active_drawable = gimage_active_drawable (gdisp->gimage);
/* if the gdisplay is for a color image, the dialog must have RGB */
switch (drawable_type (active_drawable))
{
case RGB_GIMAGE: case RGBA_GIMAGE:
info_dialog_add_label (color_picker_info, _("Red:"), red_buf);
info_dialog_add_label (color_picker_info, _("Green:"), green_buf);
info_dialog_add_label (color_picker_info, _("Blue:"), blue_buf);
info_dialog_add_label (color_picker_info, _("Alpha:"), alpha_buf);
info_dialog_add_label (color_picker_info, _("Hex Triplet:"), hex_buf);
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
info_dialog_add_label (color_picker_info, _("Index:"), index_buf);
info_dialog_add_label (color_picker_info, _("Alpha:"), alpha_buf);
info_dialog_add_label (color_picker_info, _("Red:"), red_buf);
info_dialog_add_label (color_picker_info, _("Green:"), green_buf);
info_dialog_add_label (color_picker_info, _("Blue:"), blue_buf);
info_dialog_add_label (color_picker_info, _("Hex Triplet"), hex_buf);
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
info_dialog_add_label (color_picker_info, _("Intensity:"), gray_buf);
info_dialog_add_label (color_picker_info, _("Alpha:"), alpha_buf);
info_dialog_add_label (color_picker_info, _("Hex Triplet:"), hex_buf);
break;
default :
break;
}
/* create the action area */
action_items[0].user_data = color_picker_info;
build_action_area (GTK_DIALOG (color_picker_info->shell),
action_items, 1, 0);
}
/* Keep the coordinates of the target */
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
&cp_tool->centerx, &cp_tool->centery, FALSE, 1);
gdk_pointer_grab (gdisp->canvas->window, FALSE,
(GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK),
NULL, NULL, bevent->time);
/* Make the tool active and set the gdisplay which owns it */
tool->gdisp_ptr = gdisp_ptr;
tool->state = ACTIVE;
/* First, transform the coordinates to gimp image space */
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE);
/* if the shift key is down, create a new color.
* otherwise, modify the current color.
*/
if (bevent->state & GDK_SHIFT_MASK)
{
color_picker_info_update (tool, pick_color (gdisp->gimage, active_drawable, x, y,
color_picker_options->sample_merged,
color_picker_options->sample_average,
color_picker_options->average_radius,
COLOR_NEW));
update_type = COLOR_UPDATE_NEW;
}
else
{
color_picker_info_update (tool, pick_color (gdisp->gimage, active_drawable, x, y,
color_picker_options->sample_merged,
color_picker_options->sample_average,
color_picker_options->average_radius,
COLOR_UPDATE));
update_type = COLOR_UPDATE;
}
/* Start drawing the colourpicker tool */
draw_core_start (cp_tool->core, gdisp->canvas->window, tool);
}
static void
color_picker_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
ColourPickerTool *cp_tool;
int x, y;
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gdisp = (GDisplay *) gdisp_ptr;
cp_tool = (ColourPickerTool *) tool->private;
/* First, transform the coordinates to gimp image space */
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE);
color_picker_info_update (tool, pick_color (gdisp->gimage, active_drawable, x, y,
color_picker_options->sample_merged,
color_picker_options->sample_average,
color_picker_options->average_radius,
update_type));
draw_core_stop (cp_tool->core, tool);
tool->state = INACTIVE;
}
static void
color_picker_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
ColourPickerTool *cp_tool;
int x, y;
gdisp = (GDisplay *) gdisp_ptr;
cp_tool = (ColourPickerTool *) tool->private;
/* undraw the current tool */
draw_core_pause (cp_tool->core, tool);
/* First, transform the coordinates to gimp image space */
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, FALSE);
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &cp_tool->centerx, &cp_tool->centery, FALSE, TRUE);
color_picker_info_update (tool, pick_color (gdisp->gimage, active_drawable, x, y,
color_picker_options->sample_merged,
color_picker_options->sample_average,
color_picker_options->average_radius,
update_type));
/* redraw the current tool */
draw_core_resume (cp_tool->core, tool);
}
static void
color_picker_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
int x, y;
gdisp = (GDisplay *) gdisp_ptr;
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, FALSE);
if (gimage_pick_correlate_layer (gdisp->gimage, x, y))
gdisplay_install_tool_cursor (gdisp, GIMP_COLOR_PICKER_CURSOR);
else
gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
}
static void
color_picker_control (Tool *tool,
int action,
gpointer gdisp_ptr)
{
ColourPickerTool * cp_tool;
cp_tool = (ColourPickerTool *) tool->private;
switch (action)
{
case PAUSE :
draw_core_pause (cp_tool->core, tool);
break;
case RESUME :
draw_core_resume (cp_tool->core, tool);
break;
case HALT :
draw_core_stop (cp_tool->core, tool);
break;
}
}
typedef guchar * (*GetColorFunc) (GtkObject *, int, int);
int
pick_color (GimpImage *gimage,
GimpDrawable *drawable,
int x,
int y,
gboolean sample_merged,
gboolean sample_average,
double average_radius,
int final)
{
guchar *color;
int offx, offy;
int has_alpha;
int is_indexed;
GetColorFunc get_color_func;
GtkObject *get_color_obj;
if (!drawable && !sample_merged)
return FALSE;
if (!sample_merged)
{
drawable_offsets (drawable, &offx, &offy);
x -= offx;
y -= offy;
sample_type = gimp_drawable_type (drawable);
is_indexed = gimp_drawable_indexed (drawable);
get_color_func = (GetColorFunc) gimp_drawable_get_color_at;
get_color_obj = GTK_OBJECT (drawable);
}
else
{
sample_type = gimp_image_composite_type (gimage);
is_indexed = FALSE;
get_color_func = (GetColorFunc) gimp_image_get_color_at;
get_color_obj = GTK_OBJECT (gimage);
}
has_alpha = TYPE_HAS_ALPHA (sample_type);
if (!(color = (*get_color_func) (get_color_obj, x, y)))
return FALSE;
if (sample_average)
{
int i, j;
int count = 0;
int color_avg[4] = { 0, 0, 0, 0 };
guchar *tmp_color;
int radius = (int) average_radius;
for (i = x - radius; i <= x + radius; i++)
for (j = y - radius; j <= y + radius; j++)
if ((tmp_color = (*get_color_func) (get_color_obj, i, j)))
{
count++;
color_avg[RED_PIX] += tmp_color[RED_PIX];
color_avg[GREEN_PIX] += tmp_color[GREEN_PIX];
color_avg[BLUE_PIX] += tmp_color[BLUE_PIX];
if (has_alpha)
color_avg[ALPHA_PIX] += tmp_color[3];
g_free(tmp_color);
}
color[RED_PIX] = (guchar) (color_avg[RED_PIX] / count);
color[GREEN_PIX] = (guchar) (color_avg[GREEN_PIX] / count);
color[BLUE_PIX] = (guchar) (color_avg[BLUE_PIX] / count);
if (has_alpha)
color[ALPHA_PIX] = (guchar) (color_avg[3] / count);
is_indexed = FALSE;
}
col_value[RED_PIX] = color[RED_PIX];
col_value[GREEN_PIX] = color[GREEN_PIX];
col_value[BLUE_PIX] = color[BLUE_PIX];
if (has_alpha)
col_value[ALPHA_PIX] = color[3];
if (is_indexed)
col_value[4] = color[4];
palette_set_active_color (col_value [RED_PIX], col_value [GREEN_PIX],
col_value [BLUE_PIX], final);
g_free(color);
return TRUE;
}
static void
colourpicker_draw (Tool *tool)
{
GDisplay * gdisp;
ColourPickerTool * cp_tool;
int tx, ty;
int radiusx,radiusy;
int cx,cy;
if(!color_picker_options->sample_average)
return;
gdisp = (GDisplay *) tool->gdisp_ptr;
cp_tool = (ColourPickerTool *) tool->private;
gdisplay_transform_coords (gdisp, cp_tool->centerx, cp_tool->centery,
&tx, &ty, 1);
radiusx = SCALEX(gdisp,color_picker_options->average_radius);
radiusy = SCALEY(gdisp,color_picker_options->average_radius);
cx = SCALEX(gdisp,1);
cy = SCALEY(gdisp,1);
/* Draw the circle around the collecting area */
gdk_draw_rectangle(cp_tool->core->win, cp_tool->core->gc, 0,
tx - radiusx,
ty - radiusy,
2*radiusx+cx, 2*radiusy+cy);
if(radiusx > 1 && radiusy > 1)
{
gdk_draw_rectangle(cp_tool->core->win, cp_tool->core->gc, 0,
tx - radiusx+2,
ty - radiusy+2,
2*radiusx+cx-4, 2*radiusy+cy-4);
}
}
static void
color_picker_info_update (Tool *tool,
int valid)
{
if (!valid)
{
g_snprintf (red_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (green_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (blue_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (alpha_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (index_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (gray_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (hex_buf, MAX_INFO_BUF, _("N/A"));
}
else
{
switch (sample_type)
{
case RGB_GIMAGE: case RGBA_GIMAGE:
g_snprintf (red_buf, MAX_INFO_BUF, "%d", col_value [RED_PIX]);
g_snprintf (green_buf, MAX_INFO_BUF, "%d", col_value [GREEN_PIX]);
g_snprintf (blue_buf, MAX_INFO_BUF, "%d", col_value [BLUE_PIX]);
if (sample_type == RGBA_GIMAGE)
g_snprintf (alpha_buf, MAX_INFO_BUF, "%d", col_value [ALPHA_PIX]);
else
g_snprintf (alpha_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (hex_buf, MAX_INFO_BUF, "#%.2x%.2x%.2x",
col_value [RED_PIX],
col_value [GREEN_PIX],
col_value [BLUE_PIX]);
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
g_snprintf (index_buf, MAX_INFO_BUF, "%d", col_value [4]);
if (sample_type == INDEXEDA_GIMAGE)
g_snprintf (alpha_buf, MAX_INFO_BUF, "%d", col_value [ALPHA_PIX]);
else
g_snprintf (alpha_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (red_buf, MAX_INFO_BUF, "%d", col_value [RED_PIX]);
g_snprintf (green_buf, MAX_INFO_BUF, "%d", col_value [GREEN_PIX]);
g_snprintf (blue_buf, MAX_INFO_BUF, "%d", col_value [BLUE_PIX]);
g_snprintf (hex_buf, MAX_INFO_BUF, "#%.2x%.2x%.2x",
col_value [RED_PIX],
col_value [GREEN_PIX],
col_value [BLUE_PIX]);
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
g_snprintf (gray_buf, MAX_INFO_BUF, "%d", col_value [GRAY_PIX]);
if (sample_type == GRAYA_GIMAGE)
g_snprintf (alpha_buf, MAX_INFO_BUF, "%d", col_value [ALPHA_PIX]);
else
g_snprintf (alpha_buf, MAX_INFO_BUF, _("N/A"));
g_snprintf (hex_buf, MAX_INFO_BUF, "#%.2x%.2x%.2x",
col_value [GRAY_PIX],
col_value [GRAY_PIX],
col_value [GRAY_PIX]);
break;
}
}
info_dialog_update (color_picker_info);
info_dialog_popup (color_picker_info);
}
Tool *
tools_new_color_picker ()
{
Tool * tool;
ColourPickerTool * private;
/* The tool options */
if (! color_picker_options)
{
color_picker_options = color_picker_options_new ();
tools_register (COLOR_PICKER, (ToolOptions *) color_picker_options);
}
tool = (Tool *) g_malloc (sizeof (Tool));
private = (ColourPickerTool *) g_malloc(sizeof(ColourPickerTool));
private->core = draw_core_new (colourpicker_draw);
tool->type = COLOR_PICKER;
tool->state = INACTIVE;
tool->scroll_lock = 0; /* Allow scrolling */
tool->auto_snap_to = TRUE;
tool->private = private;
tool->button_press_func = color_picker_button_press;
tool->button_release_func = color_picker_button_release;
tool->motion_func = color_picker_motion;
tool->arrow_keys_func = standard_arrow_keys_func; tool->modifier_key_func = standard_modifier_key_func;
tool->cursor_update_func = color_picker_cursor_update;
tool->control_func = color_picker_control;
tool->preserve = TRUE;
return tool;
}
void
tools_free_color_picker (Tool *tool)
{
ColourPickerTool * cp_tool;
cp_tool = (ColourPickerTool *) tool->private;
if (tool->state == ACTIVE)
draw_core_stop (cp_tool->core, tool);
draw_core_free (cp_tool->core);
if (color_picker_info)
{
info_dialog_free (color_picker_info);
color_picker_info = NULL;
}
g_free(cp_tool);
}
static void
color_picker_info_window_close_callback (GtkWidget *w,
gpointer client_data)
{
info_dialog_popdown ((InfoDialog *) client_data);
}
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