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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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "appenv.h"
#include "boundary.h"
#include "by_color_select.h"
#include "colormaps.h"
#include "drawable.h"
#include "draw_core.h"
#include "general.h"
#include "gimage_mask.h"
#include "gimprc.h"
#include "gdisplay.h"
#include "selection_options.h"
#include "libgimp/gimpintl.h"
#include "tile.h" /* ick. */
#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
{
int x, y; /* Point from which to execute seed fill */
int operation; /* add, subtract, normal color selection */
};
typedef struct _ByColorDialog ByColorDialog;
struct _ByColorDialog
{
GtkWidget *shell;
GtkWidget *preview;
GtkWidget *gimage_name;
int threshold; /* threshold value for color select */
int 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;
/* 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_motion (Tool *, GdkEventMotion *, gpointer);
static void by_color_select_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void by_color_select_control (Tool *, int, gpointer);
static ByColorDialog * by_color_select_new_dialog (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 gint by_color_select_delete_callback (GtkWidget *, GdkEvent *, gpointer);
static void by_color_select_fuzzy_update (GtkAdjustment *, gpointer);
static void by_color_select_preview_button_press (ByColorDialog *, GdkEventButton *);
static int is_pixel_sufficiently_different (unsigned char *, unsigned char *, int, int, int, int);
static Channel * by_color_select_color (GImage *, GimpDrawable *, unsigned char *, int, int, int);
/* by_color selection machinery */
static int
is_pixel_sufficiently_different (unsigned char *col1,
unsigned char *col2,
int antialias,
int threshold,
int bytes,
int 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 (unsigned char) (aa * 512);
else
return 255;
}
else
{
if (max > threshold)
return 0;
else
return 255;
}
}
static Channel *
by_color_select_color (GImage *gimage,
GimpDrawable *drawable,
unsigned char *color,
int antialias,
int threshold,
int 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;
unsigned char *image_data;
unsigned char *mask_data;
unsigned char *idata, *mdata;
unsigned char 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,
unsigned char *color,
int threshold,
int op,
int antialias,
int feather,
double feather_radius,
int 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, 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;
by_color_dialog->gimage = gdisp->gimage;
gdisp->gimage->by_color_select = TRUE;
}
static void
by_color_select_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
ByColorSelect * by_color_sel;
GDisplay * gdisp;
int x, y;
GimpDrawable *drawable;
unsigned char *color;
int use_offsets;
gdisp = (GDisplay *) gdisp_ptr;
by_color_sel = (ByColorSelect *) tool->private;
drawable = gimage_active_drawable (gdisp->gimage);
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_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
}
static void
by_color_select_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
Layer *layer;
int 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,
int action,
gpointer gdisp_ptr)
{
ByColorSelect * by_color_sel;
by_color_sel = (ByColorSelect *) tool->private;
switch (action)
{
case PAUSE :
break;
case RESUME :
break;
case HALT :
if (by_color_dialog)
{
if (by_color_dialog->gimage)
by_color_dialog->gimage->by_color_select = FALSE;
by_color_dialog->gimage = NULL;
by_color_select_close_callback (NULL, (gpointer) by_color_dialog);
}
break;
}
}
static void
by_color_select_options_reset ()
{
selection_options_reset (by_color_options);
}
Tool *
tools_new_by_color_select ()
{
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_new_dialog ();
else
if (!GTK_WIDGET_VISIBLE (by_color_dialog->shell))
gtk_widget_show (by_color_dialog->shell);
tool = (Tool *) g_malloc (sizeof (Tool));
private = (ByColorSelect *) g_malloc (sizeof (ByColorSelect));
tool->type = BY_COLOR_SELECT;
tool->state = INACTIVE;
tool->scroll_lock = 1; /* Disallow scrolling */
tool->auto_snap_to = TRUE;
tool->private = (void *) private;
tool->button_press_func = by_color_select_button_press;
tool->button_release_func = by_color_select_button_release;
tool->motion_func = by_color_select_motion;
tool->arrow_keys_func = standard_arrow_keys_func;
tool->cursor_update_func = by_color_select_cursor_update;
tool->control_func = by_color_select_control;
tool->gdisp_ptr = NULL;
tool->drawable = NULL;
tool->preserve = TRUE;
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)
{
if (by_color_dialog->gimage)
by_color_dialog->gimage->by_color_select = FALSE;
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)
{
/* wrap this call so the tool_info->init_func works */
by_color_select_initialize_by_image (gdisp->gimage);
}
/****************************/
/* Select by Color dialog */
/****************************/
static ByColorDialog *
by_color_select_new_dialog ()
{
ByColorDialog *bcd;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *frame;
GtkWidget *options_box;
GtkWidget *label;
GtkWidget *util_box;
GtkWidget *push_button;
GtkWidget *slider;
GtkWidget *radio_box;
GtkWidget *radio_button;
GtkObject *data;
GSList *group = NULL;
int i;
char *button_names[4] =
{
N_("Replace"),
N_("Add"),
N_("Subtract"),
N_("Intersect")
};
int button_values[4] =
{
REPLACE,
ADD,
SUB,
INTERSECT
};
bcd = g_malloc (sizeof (ByColorDialog));
bcd->gimage = NULL;
bcd->operation = REPLACE;
bcd->threshold = DEFAULT_FUZZINESS;
/* The shell and main vbox */
bcd->shell = gtk_dialog_new ();
gtk_window_set_wmclass (GTK_WINDOW (bcd->shell), "by_color_selection", "Gimp");
gtk_window_set_title (GTK_WINDOW (bcd->shell), _("By Color Selection"));
gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (bcd->shell)->action_area), 2);
/* handle the wm close signal */
gtk_signal_connect (GTK_OBJECT (bcd->shell), "delete_event",
(GtkSignalFunc) by_color_select_delete_callback,
bcd);
/* The vbox */
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (bcd->shell)->vbox), vbox, TRUE, TRUE, 0);
/* The horizontal box containing preview & options box */
hbox = gtk_hbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
/* The preview */
util_box = gtk_vbox_new (FALSE, 2);
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_signal_connect (GTK_OBJECT (bcd->preview), "button_press_event",
(GtkSignalFunc) by_color_select_preview_events,
bcd);
gtk_container_add (GTK_CONTAINER (frame), bcd->preview);
gtk_widget_show (bcd->preview);
gtk_widget_show (frame);
gtk_widget_show (util_box);
/* options box */
options_box = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (options_box), 5);
gtk_box_pack_start (GTK_BOX (hbox), options_box, TRUE, TRUE, 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, 2);
gtk_widget_show (bcd->gimage_name);
gtk_widget_show (util_box);
/* Create the selection mode radio box */
frame = gtk_frame_new (_("Selection Mode"));
gtk_box_pack_start (GTK_BOX (options_box), frame, FALSE, FALSE, 0);
radio_box = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), radio_box);
/* the radio buttons */
for (i = 0; i < (sizeof(button_names) / sizeof(button_names[0])); i++)
{
radio_button = gtk_radio_button_new_with_label (group, button_names[i]);
group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio_button));
gtk_box_pack_start (GTK_BOX (radio_box), radio_button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) by_color_select_type_callback,
(gpointer) ((long) button_values[i]));
gtk_widget_show (radio_button);
}
gtk_widget_show (radio_box);
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);
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",
(GtkSignalFunc) by_color_select_fuzzy_update,
bcd);
gtk_widget_show (label);
gtk_widget_show (slider);
gtk_widget_show (util_box);
/* The reset push button */
push_button = gtk_button_new_with_label (_("Reset"));
GTK_WIDGET_SET_FLAGS (push_button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (bcd->shell)->action_area), push_button, TRUE, TRUE, 0);
gtk_signal_connect (GTK_OBJECT (push_button), "clicked",
(GtkSignalFunc) by_color_select_reset_callback,
bcd);
gtk_widget_grab_default (push_button);
gtk_widget_show (push_button);
/* The close push button */
push_button = gtk_button_new_with_label (_("Close"));
GTK_WIDGET_SET_FLAGS (push_button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (bcd->shell)->action_area), push_button, TRUE, TRUE, 0);
gtk_signal_connect (GTK_OBJECT (push_button), "clicked",
(GtkSignalFunc) by_color_select_close_callback,
bcd);
gtk_widget_show (push_button);
gtk_widget_show (options_box);
gtk_widget_show (hbox);
gtk_widget_show (vbox);
gtk_widget_show (bcd->shell);
return bcd;
}
static void
by_color_select_render (ByColorDialog *bcd,
GImage *gimage)
{
Channel * mask;
MaskBuf * scaled_buf = NULL;
unsigned char *buf;
PixelRegion srcPR, destPR;
unsigned char * src;
int subsample;
int width, height;
int srcwidth;
int i;
int 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 = (unsigned char *) g_malloc (bcd->preview->requisition.width);
memset (buf, 0, 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 client_data)
{
if (by_color_dialog)
by_color_dialog->operation = (long) client_data;
}
static void
by_color_select_reset_callback (GtkWidget *widget,
gpointer client_data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) client_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 gint
by_color_select_delete_callback (GtkWidget *w,
GdkEvent *e,
gpointer client_data)
{
by_color_select_close_callback (w, client_data);
return TRUE;
}
static void
by_color_select_close_callback (GtkWidget *widget,
gpointer client_data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) client_data;
if (GTK_WIDGET_VISIBLE (bcd->shell))
gtk_widget_hide (bcd->shell);
}
static void
by_color_select_fuzzy_update (GtkAdjustment *adjustment,
gpointer data)
{
ByColorDialog *bcd;
bcd = (ByColorDialog *) data;
bcd->threshold = (int) adjustment->value;
}
static void
by_color_select_preview_button_press (ByColorDialog *bcd,
GdkEventButton *bevent)
{
int x, y;
int replace, operation;
GimpDrawable *drawable;
Tile *tile;
unsigned char *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);
}
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