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gimp/app/by_color_select.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 "appenv.h"
#include "boundary.h"
#include "by_color_select.h"
#include "colormaps.h"
#include "drawable.h"
#include "draw_core.h"
#include "gimage_mask.h"
#include "gimpdnd.h"
#include "gimprc.h"
#include "gimpset.h"
#include "gimpui.h"
#include "gdisplay.h"
#include "selection_options.h"
#include "tile.h" /* ick. */
#include "libgimp/gimpintl.h"
#define DEFAULT_FUZZINESS 15
#define PREVIEW_WIDTH 256
#define PREVIEW_HEIGHT 256
#define PREVIEW_EVENT_MASK GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_ENTER_NOTIFY_MASK
/* the by color selection structures */
typedef struct _ByColorSelect ByColorSelect;
struct _ByColorSelect
{
gint x, y; /* Point from which to execute seed fill */
gint operation; /* add, subtract, normal color selection */
};
typedef struct _ByColorDialog ByColorDialog;
struct _ByColorDialog
{
GtkWidget *shell;
GtkWidget *preview;
GtkWidget *gimage_name;
gint threshold; /* threshold value for color select */
gint operation; /* Add, Subtract, Replace */
GImage *gimage; /* gimage which is currently under examination */
};
/* the by color selection tool options */
static SelectionOptions * by_color_options = NULL;
/* the by color selection dialog */
static ByColorDialog * by_color_dialog = NULL;
/* dnd stuff */
static GtkTargetEntry by_color_select_targets[] =
{
GIMP_TARGET_COLOR
};
static guint n_by_color_select_targets = (sizeof (by_color_select_targets) /
sizeof (by_color_select_targets[0]));
static void by_color_select_color_drop (GtkWidget *, guchar, guchar, guchar,
gpointer);
/* by_color select action functions */
static void by_color_select_button_press (Tool *, GdkEventButton *, gpointer);
static void by_color_select_button_release (Tool *, GdkEventButton *, gpointer);
static void by_color_select_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void by_color_select_control (Tool *, ToolAction, gpointer);
static ByColorDialog * by_color_select_dialog_new (void);
static void by_color_select_render (ByColorDialog *, GImage *);
static void by_color_select_draw (ByColorDialog *, GImage *);
static gint by_color_select_preview_events (GtkWidget *,
GdkEventButton *,
ByColorDialog *);
static void by_color_select_type_callback (GtkWidget *, gpointer);
static void by_color_select_reset_callback (GtkWidget *, gpointer);
static void by_color_select_close_callback (GtkWidget *, gpointer);
static void by_color_select_fuzzy_update (GtkAdjustment *, gpointer);
static void by_color_select_preview_button_press (ByColorDialog *,
GdkEventButton *);
static gint is_pixel_sufficiently_different (guchar *, guchar *,
gint, gint, gint, gint);
static Channel * by_color_select_color (GImage *, GimpDrawable *,
guchar *, gint, gint, gint);
/* by_color selection machinery */
static int
is_pixel_sufficiently_different (guchar *col1,
guchar *col2,
gint antialias,
gint threshold,
gint bytes,
gint has_alpha)
{
int diff;
int max;
int b;
int alpha;
max = 0;
alpha = (has_alpha) ? bytes - 1 : bytes;
/* if there is an alpha channel, never select transparent regions */
if (has_alpha && col2[alpha] == 0)
return 0;
for (b = 0; b < alpha; b++)
{
diff = col1[b] - col2[b];
diff = abs (diff);
if (diff > max)
max = diff;
}
if (antialias && threshold > 0)
{
float aa;
aa = 1.5 - ((float) max / threshold);
if (aa <= 0)
return 0;
else if (aa < 0.5)
return (guchar) (aa * 512);
else
return 255;
}
else
{
if (max > threshold)
return 0;
else
return 255;
}
}
static Channel *
by_color_select_color (GImage *gimage,
GimpDrawable *drawable,
guchar *color,
gint antialias,
gint threshold,
gint sample_merged)
{
/* Scan over the gimage's active layer, finding pixels within the specified
* threshold from the given R, G, & B values. If antialiasing is on,
* use the same antialiasing scheme as in fuzzy_select. Modify the gimage's
* mask to reflect the additional selection
*/
Channel *mask;
PixelRegion imagePR, maskPR;
guchar *image_data;
guchar *mask_data;
guchar *idata, *mdata;
guchar rgb[MAX_CHANNELS];
int has_alpha, indexed;
int width, height;
int bytes, color_bytes, alpha;
int i, j;
void * pr;
int d_type;
/* Get the image information */
if (sample_merged)
{
bytes = gimage_composite_bytes (gimage);
d_type = gimage_composite_type (gimage);
has_alpha = (d_type == RGBA_GIMAGE ||
d_type == GRAYA_GIMAGE ||
d_type == INDEXEDA_GIMAGE);
indexed = d_type == INDEXEDA_GIMAGE || d_type == INDEXED_GIMAGE;
width = gimage->width;
height = gimage->height;
pixel_region_init (&imagePR, gimage_composite (gimage),
0, 0, width, height, FALSE);
}
else
{
bytes = drawable_bytes (drawable);
d_type = drawable_type (drawable);
has_alpha = drawable_has_alpha (drawable);
indexed = drawable_indexed (drawable);
width = drawable_width (drawable);
height = drawable_height (drawable);
pixel_region_init (&imagePR, drawable_data (drawable),
0, 0, width, height, FALSE);
}
if (indexed)
{
/* indexed colors are always RGB or RGBA */
color_bytes = has_alpha ? 4 : 3;
}
else
{
/* RGB, RGBA, GRAY and GRAYA colors are shaped just like the image */
color_bytes = bytes;
}
alpha = bytes - 1;
mask = channel_new_mask (gimage, width, height);
pixel_region_init (&maskPR, drawable_data (GIMP_DRAWABLE(mask)),
0, 0, width, height, TRUE);
/* iterate over the entire image */
for (pr = pixel_regions_register (2, &imagePR, &maskPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
image_data = imagePR.data;
mask_data = maskPR.data;
for (i = 0; i < imagePR.h; i++)
{
idata = image_data;
mdata = mask_data;
for (j = 0; j < imagePR.w; j++)
{
/* Get the rgb values for the color */
gimage_get_color (gimage, d_type, rgb, idata);
/* Plug the alpha channel in there */
if (has_alpha)
rgb[color_bytes - 1] = idata[alpha];
/* Find how closely the colors match */
*mdata++ = is_pixel_sufficiently_different (color,
rgb,
antialias,
threshold,
color_bytes,
has_alpha);
idata += bytes;
}
image_data += imagePR.rowstride;
mask_data += maskPR.rowstride;
}
}
return mask;
}
void
by_color_select (GImage *gimage,
GimpDrawable *drawable,
guchar *color,
gint threshold,
gint op,
gint antialias,
gint feather,
gdouble feather_radius,
gint sample_merged)
{
Channel * new_mask;
int off_x, off_y;
if (!drawable)
return;
new_mask = by_color_select_color (gimage, drawable, color,
antialias, threshold, sample_merged);
/* if applicable, replace the current selection */
if (op == REPLACE)
gimage_mask_clear (gimage);
else
gimage_mask_undo (gimage);
if (sample_merged)
{
off_x = 0; off_y = 0;
}
else
drawable_offsets (drawable, &off_x, &off_y);
if (feather)
channel_feather (new_mask, gimage_get_mask (gimage),
feather_radius,
feather_radius,
op, off_x, off_y);
else
channel_combine_mask (gimage_get_mask (gimage),
new_mask, op, off_x, off_y);
channel_delete (new_mask);
}
/* by_color select action functions */
static void
by_color_select_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
ByColorSelect *by_color_sel;
gdisp = (GDisplay *) gdisp_ptr;
by_color_sel = (ByColorSelect *) tool->private;
tool->drawable = gimage_active_drawable (gdisp->gimage);
if (!by_color_dialog)
return;
by_color_sel->x = bevent->x;
by_color_sel->y = bevent->y;
tool->state = ACTIVE;
tool->gdisp_ptr = gdisp_ptr;
/* Defaults */
by_color_sel->operation = REPLACE;
/* Based on modifiers, and the "by color" dialog's selection mode */
if ((bevent->state & GDK_SHIFT_MASK) && !(bevent->state & GDK_CONTROL_MASK))
by_color_sel->operation = ADD;
else if ((bevent->state & GDK_CONTROL_MASK) && !(bevent->state & GDK_SHIFT_MASK))
by_color_sel->operation = SUB;
else if ((bevent->state & GDK_CONTROL_MASK) && (bevent->state & GDK_SHIFT_MASK))
by_color_sel->operation = INTERSECT;
else
by_color_sel->operation = by_color_dialog->operation;
/* Make sure the "by color" select dialog is visible */
if (! GTK_WIDGET_VISIBLE (by_color_dialog->shell))
gtk_widget_show (by_color_dialog->shell);
/* Update the by_color_dialog's active gdisp pointer */
if (by_color_dialog->gimage)
by_color_dialog->gimage->by_color_select = FALSE;
if (by_color_dialog->gimage != gdisp->gimage)
{
gdk_draw_rectangle
(by_color_dialog->preview->window,
by_color_dialog->preview->style->bg_gc[GTK_STATE_NORMAL],
TRUE,
0, 0,
by_color_dialog->preview->allocation.width,
by_color_dialog->preview->allocation.width);
}
by_color_dialog->gimage = gdisp->gimage;
gdisp->gimage->by_color_select = TRUE;
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
}
static void
by_color_select_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
ByColorSelect * by_color_sel;
GDisplay * gdisp;
gint x, y;
GimpDrawable *drawable;
guchar *color;
gint use_offsets;
gdisp = (GDisplay *) gdisp_ptr;
by_color_sel = (ByColorSelect *) tool->private;
drawable = gimage_active_drawable (gdisp->gimage);
gdk_pointer_ungrab (bevent->time);
tool->state = INACTIVE;
/* First take care of the case where the user "cancels" the action */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
use_offsets = (by_color_options->sample_merged) ? FALSE : TRUE;
gdisplay_untransform_coords (gdisp, by_color_sel->x, by_color_sel->y,
&x, &y, FALSE, use_offsets);
/* Get the start color */
if (by_color_options->sample_merged)
{
if (!(color = gimp_image_get_color_at (gdisp->gimage, x, y)))
return;
}
else
{
if (!(color = gimp_drawable_get_color_at (drawable, x, y)))
return;
}
/* select the area */
by_color_select (gdisp->gimage, drawable, color,
by_color_dialog->threshold,
by_color_sel->operation,
by_color_options->antialias,
by_color_options->feather,
by_color_options->feather_radius,
by_color_options->sample_merged);
g_free (color);
/* show selection on all views */
gdisplays_flush ();
/* update the preview window */
by_color_select_render (by_color_dialog, gdisp->gimage);
by_color_select_draw (by_color_dialog, gdisp->gimage);
}
}
static void
by_color_select_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
Layer *layer;
gint x, y;
gdisp = (GDisplay *) gdisp_ptr;
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y,
&x, &y, FALSE, FALSE);
if ((layer = gimage_pick_correlate_layer (gdisp->gimage, x, y)))
if (layer == gdisp->gimage->active_layer)
{
gdisplay_install_tool_cursor (gdisp, GDK_TCROSS);
return;
}
gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
}
static void
by_color_select_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
switch (action)
{
case PAUSE :
break;
case RESUME :
break;
case HALT :
if (by_color_dialog)
by_color_select_close_callback (NULL, (gpointer) by_color_dialog);
break;
default:
break;
}
}
static void
by_color_select_options_reset (void)
{
selection_options_reset (by_color_options);
}
Tool *
tools_new_by_color_select (void)
{
Tool * tool;
ByColorSelect * private;
/* The tool options */
if (!by_color_options)
{
by_color_options =
selection_options_new (BY_COLOR_SELECT, by_color_select_options_reset);
tools_register (BY_COLOR_SELECT, (ToolOptions *) by_color_options);
}
/* The "by color" dialog */
if (!by_color_dialog)
by_color_dialog = by_color_select_dialog_new ();
else
if (!GTK_WIDGET_VISIBLE (by_color_dialog->shell))
gtk_widget_show (by_color_dialog->shell);
tool = tools_new_tool (BY_COLOR_SELECT);
private = g_new (ByColorSelect, 1);
tool->scroll_lock = TRUE; /* Disallow scrolling */
tool->private = (void *) private;
tool->button_press_func = by_color_select_button_press;
tool->button_release_func = by_color_select_button_release;
tool->cursor_update_func = by_color_select_cursor_update;
tool->control_func = by_color_select_control;
return tool;
}
void
tools_free_by_color_select (Tool *tool)
{
ByColorSelect * by_color_sel;
by_color_sel = (ByColorSelect *) tool->private;
/* Close the color select dialog */
if (by_color_dialog)
by_color_select_close_callback (NULL, (gpointer) by_color_dialog);
g_free (by_color_sel);
}
void
by_color_select_initialize_by_image (GImage *gimage)
{
/* update the preview window */
if (by_color_dialog)
{
by_color_dialog->gimage = gimage;
gimage->by_color_select = TRUE;
by_color_select_render (by_color_dialog, gimage);
by_color_select_draw (by_color_dialog, gimage);
}
}
void
by_color_select_initialize (GDisplay *gdisp)
{
by_color_select_initialize_by_image (gdisp->gimage);
}
/****************************/
/* Select by Color dialog */
/****************************/
static ByColorDialog *
by_color_select_dialog_new (void)
{
ByColorDialog *bcd;
GtkWidget *hbox;
GtkWidget *frame;
GtkWidget *options_box;
GtkWidget *label;
GtkWidget *util_box;
GtkWidget *slider;
GtkObject *data;
bcd = g_new (ByColorDialog, 1);
bcd->gimage = NULL;
bcd->operation = REPLACE;
bcd->threshold = DEFAULT_FUZZINESS;
/* The shell and main vbox */
bcd->shell = gimp_dialog_new (_("By Color Selection"), "by_color_selection",
tools_help_func, NULL,
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
_("Reset"), by_color_select_reset_callback,
bcd, NULL, FALSE, FALSE,
_("Close"), by_color_select_close_callback,
bcd, NULL, TRUE, TRUE,
NULL);
/* The main hbox */
hbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 4);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (bcd->shell)->vbox), hbox);
/* The preview */
util_box = gtk_vbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (hbox), util_box, FALSE, FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (util_box), frame, FALSE, FALSE, 0);
bcd->preview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (bcd->preview), PREVIEW_WIDTH, PREVIEW_HEIGHT);
gtk_widget_set_events (bcd->preview, PREVIEW_EVENT_MASK);
gtk_container_add (GTK_CONTAINER (frame), bcd->preview);
gtk_signal_connect (GTK_OBJECT (bcd->preview), "button_press_event",
GTK_SIGNAL_FUNC (by_color_select_preview_events),
bcd);
/* dnd colors to the image window */
gtk_drag_dest_set (bcd->preview,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
by_color_select_targets,
n_by_color_select_targets,
GDK_ACTION_COPY);
gimp_dnd_color_dest_set (bcd->preview, by_color_select_color_drop, bcd);
gtk_widget_show (bcd->preview);
gtk_widget_show (frame);
gtk_widget_show (util_box);
/* options box */
options_box = gtk_vbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (hbox), options_box, FALSE, FALSE, 0);
/* Create the active image label */
util_box = gtk_hbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (options_box), util_box, FALSE, FALSE, 0);
bcd->gimage_name = gtk_label_new (_("Inactive"));
gtk_box_pack_start (GTK_BOX (util_box), bcd->gimage_name, FALSE, FALSE, 0);
gtk_widget_show (bcd->gimage_name);
gtk_widget_show (util_box);
/* Create the selection mode radio box */
frame =
gimp_radio_group_new (TRUE, _("Selection Mode"),
_("Replace"), by_color_select_type_callback,
(gpointer) REPLACE, NULL, NULL, TRUE,
_("Add"), by_color_select_type_callback,
(gpointer) ADD, NULL, NULL, FALSE,
_("Subtract"), by_color_select_type_callback,
(gpointer) SUB, NULL, NULL, FALSE,
_("Intersect"), by_color_select_type_callback,
(gpointer) INTERSECT, NULL, NULL, FALSE,
NULL);
gtk_box_pack_start (GTK_BOX (options_box), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
/* Create the opacity scale widget */
util_box = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (options_box), util_box, FALSE, FALSE, 0);
label = gtk_label_new (_("Fuzziness Threshold"));
gtk_box_pack_start (GTK_BOX (util_box), label, FALSE, FALSE, 2);
gtk_widget_show (label);
gtk_widget_show (util_box);
data = gtk_adjustment_new (bcd->threshold, 0.0, 255.0, 1.0, 1.0, 0.0);
slider = gtk_hscale_new (GTK_ADJUSTMENT (data));
gtk_box_pack_start (GTK_BOX (util_box), slider, TRUE, TRUE, 0);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (data), "value_changed",
GTK_SIGNAL_FUNC (by_color_select_fuzzy_update),
bcd);
gtk_widget_show (slider);
gtk_widget_show (options_box);
gtk_widget_show (hbox);
gtk_widget_show (bcd->shell);
return bcd;
}
static void
by_color_select_render (ByColorDialog *bcd,
GImage *gimage)
{
Channel * mask;
MaskBuf * scaled_buf = NULL;
guchar *buf;
PixelRegion srcPR, destPR;
guchar * src;
gint subsample;
gint width, height;
gint srcwidth;
gint i;
gint scale;
mask = gimage_get_mask (gimage);
if ((drawable_width (GIMP_DRAWABLE(mask)) > PREVIEW_WIDTH) ||
(drawable_height (GIMP_DRAWABLE(mask)) > PREVIEW_HEIGHT))
{
if (((float) drawable_width (GIMP_DRAWABLE (mask)) / (float) PREVIEW_WIDTH) >
((float) drawable_height (GIMP_DRAWABLE (mask)) / (float) PREVIEW_HEIGHT))
{
width = PREVIEW_WIDTH;
height = ((drawable_height (GIMP_DRAWABLE (mask)) * PREVIEW_WIDTH) /
drawable_width (GIMP_DRAWABLE (mask)));
}
else
{
width = ((drawable_width (GIMP_DRAWABLE (mask)) * PREVIEW_HEIGHT) /
drawable_height (GIMP_DRAWABLE (mask)));
height = PREVIEW_HEIGHT;
}
scale = TRUE;
}
else
{
width = drawable_width (GIMP_DRAWABLE (mask));
height = drawable_height (GIMP_DRAWABLE (mask));
scale = FALSE;
}
if ((width != bcd->preview->requisition.width) ||
(height != bcd->preview->requisition.height))
gtk_preview_size (GTK_PREVIEW (bcd->preview), width, height);
/* clear the image buf */
buf = g_new0 (guchar, bcd->preview->requisition.width);
for (i = 0; i < bcd->preview->requisition.height; i++)
gtk_preview_draw_row (GTK_PREVIEW (bcd->preview), buf,
0, i, bcd->preview->requisition.width);
g_free (buf);
/* if the mask is empty, no need to scale and update again */
if (gimage_mask_is_empty (gimage))
return;
if (scale)
{
/* calculate 'acceptable' subsample */
subsample = 1;
while ((width * (subsample + 1) * 2 < drawable_width (GIMP_DRAWABLE (mask))) &&
(height * (subsample + 1) * 2 < drawable_height (GIMP_DRAWABLE (mask))))
subsample = subsample + 1;
pixel_region_init (&srcPR, drawable_data (GIMP_DRAWABLE (mask)),
0, 0,
drawable_width (GIMP_DRAWABLE (mask)),
drawable_height (GIMP_DRAWABLE (mask)), FALSE);
scaled_buf = mask_buf_new (width, height);
destPR.bytes = 1;
destPR.x = 0;
destPR.y = 0;
destPR.w = width;
destPR.h = height;
destPR.rowstride = srcPR.bytes * width;
destPR.data = mask_buf_data (scaled_buf);
destPR.tiles = NULL;
subsample_region (&srcPR, &destPR, subsample);
}
else
{
pixel_region_init (&srcPR, drawable_data (GIMP_DRAWABLE (mask)),
0, 0,
drawable_width (GIMP_DRAWABLE (mask)),
drawable_height (GIMP_DRAWABLE (mask)), FALSE);
scaled_buf = mask_buf_new (width, height);
destPR.bytes = 1;
destPR.x = 0;
destPR.y = 0;
destPR.w = width;
destPR.h = height;
destPR.rowstride = srcPR.bytes * width;
destPR.data = mask_buf_data (scaled_buf);
destPR.tiles = NULL;
copy_region (&srcPR, &destPR);
}
src = mask_buf_data (scaled_buf);
srcwidth = scaled_buf->width;
for (i = 0; i < height; i++)
{
gtk_preview_draw_row (GTK_PREVIEW (bcd->preview), src, 0, i, width);
src += srcwidth;
}
mask_buf_free (scaled_buf);
}
static void
by_color_select_draw (ByColorDialog *bcd,
GImage *gimage)
{
/* Draw the image buf to the preview window */
gtk_widget_draw (bcd->preview, NULL);
/* Update the gimage label to reflect the displayed gimage name */
gtk_label_set_text (GTK_LABEL (bcd->gimage_name),
g_basename (gimage_filename (gimage)));
}
static gint
by_color_select_preview_events (GtkWidget *widget,
GdkEventButton *bevent,
ByColorDialog *bcd)
{
switch (bevent->type)
{
case GDK_BUTTON_PRESS:
by_color_select_preview_button_press (bcd, bevent);
break;
default:
break;
}
return FALSE;
}
static void
by_color_select_type_callback (GtkWidget *widget,
gpointer data)
{
if (by_color_dialog)
by_color_dialog->operation = (long) data;
}
static void
by_color_select_reset_callback (GtkWidget *widget,
gpointer data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) data;
if (!bcd->gimage)
return;
/* check if the image associated to the mask still exists */
if (!drawable_gimage (GIMP_DRAWABLE (gimage_get_mask (bcd->gimage))))
return;
/* reset the mask */
gimage_mask_clear (bcd->gimage);
/* show selection on all views */
gdisplays_flush ();
/* update the preview window */
by_color_select_render (bcd, bcd->gimage);
by_color_select_draw (bcd, bcd->gimage);
}
static void
by_color_select_close_callback (GtkWidget *widget,
gpointer data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) data;
if (GTK_WIDGET_VISIBLE (bcd->shell))
gtk_widget_hide (bcd->shell);
if (bcd->gimage && gimp_set_have (image_context, bcd->gimage))
{
bcd->gimage->by_color_select = FALSE;
bcd->gimage = NULL;
}
}
static void
by_color_select_fuzzy_update (GtkAdjustment *adjustment,
gpointer data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) data;
bcd->threshold = (gint) (adjustment->value + 0.5);
}
static void
by_color_select_preview_button_press (ByColorDialog *bcd,
GdkEventButton *bevent)
{
gint x, y;
gint replace, operation;
GimpDrawable *drawable;
Tile *tile;
guchar *col;
if (!bcd->gimage)
return;
drawable = gimage_active_drawable (bcd->gimage);
/* check if the gimage associated to the drawable still exists */
if (!drawable_gimage (drawable))
return;
/* Defaults */
replace = FALSE;
operation = REPLACE;
/* Based on modifiers, and the "by color" dialog's selection mode */
if ((bevent->state & GDK_SHIFT_MASK) && !(bevent->state & GDK_CONTROL_MASK))
operation = ADD;
else if ((bevent->state & GDK_CONTROL_MASK) && !(bevent->state & GDK_SHIFT_MASK))
operation = SUB;
else if ((bevent->state & GDK_CONTROL_MASK) && (bevent->state & GDK_SHIFT_MASK))
operation = INTERSECT;
else
operation = by_color_dialog->operation;
/* Find x, y and modify selection */
/* Get the start color */
if (by_color_options->sample_merged)
{
x = bcd->gimage->width * bevent->x / bcd->preview->requisition.width;
y = bcd->gimage->height * bevent->y / bcd->preview->requisition.height;
if (x < 0 || y < 0 || x >= bcd->gimage->width || y >= bcd->gimage->height)
return;
tile = tile_manager_get_tile (gimage_composite (bcd->gimage), x, y, TRUE, FALSE);
col = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
}
else
{
int offx, offy;
drawable_offsets (drawable, &offx, &offy);
x = drawable_width (drawable) * bevent->x / bcd->preview->requisition.width - offx;
y = drawable_height (drawable) * bevent->y / bcd->preview->requisition.height - offy;
if (x < 0 || y < 0 || x >= drawable_width (drawable) || y >= drawable_height (drawable))
return;
tile = tile_manager_get_tile (drawable_data (drawable), x, y, TRUE, FALSE);
col = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
}
by_color_select (bcd->gimage, drawable, col,
bcd->threshold,
operation,
by_color_options->antialias,
by_color_options->feather,
by_color_options->feather_radius,
by_color_options->sample_merged);
tile_release (tile, FALSE);
/* show selection on all views */
gdisplays_flush ();
/* update the preview window */
by_color_select_render (bcd, bcd->gimage);
by_color_select_draw (bcd, bcd->gimage);
}
static void
by_color_select_color_drop (GtkWidget *widget,
guchar r,
guchar g,
guchar b,
gpointer data)
{
GimpDrawable *drawable;
ByColorDialog *bcd;
guchar col[3];
bcd = (ByColorDialog*) data;
drawable = gimage_active_drawable (bcd->gimage);
col[0] = r;
col[1] = g;
col[2] = b;
by_color_select (bcd->gimage,
drawable,
col,
bcd->threshold,
bcd->operation,
by_color_options->antialias,
by_color_options->feather,
by_color_options->feather_radius,
by_color_options->sample_merged);
/* show selection on all views */
gdisplays_flush ();
/* update the preview window */
by_color_select_render (bcd, bcd->gimage);
by_color_select_draw (bcd, bcd->gimage);
}
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