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gimp/app/tools/crop.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 <string.h>
#include <gdk/gdkkeysyms.h>
#include "appenv.h"
#include "crop.h"
#include "cursorutil.h"
#include "draw_core.h"
#include "drawable.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "gimage_mask.h"
#include "gimphelp.h"
#include "gimpui.h"
#include "info_dialog.h"
#include "undo.h"
#include "config.h"
#include "libgimp/gimpsizeentry.h"
#include "libgimp/gimpintl.h"
#define STATUSBAR_SIZE 128
/* possible crop functions */
#define CREATING 0
#define MOVING 1
#define RESIZING_LEFT 2
#define RESIZING_RIGHT 3
#define CROPPING 4
/* speed of key movement */
#define ARROW_VELOCITY 25
/* the crop structures */
typedef struct _Crop Crop;
struct _Crop
{
DrawCore *core; /* Core select object */
gint startx; /* starting x coord */
gint starty; /* starting y coord */
gint lastx; /* previous x coord */
gint lasty; /* previous y coord */
gint x1, y1; /* upper left hand coordinate */
gint x2, y2; /* lower right hand coords */
gint srw, srh; /* width and height of corners */
gint tx1, ty1; /* transformed coords */
gint tx2, ty2; /* */
gint function; /* moving or resizing */
guint context_id; /* for the statusbar */
};
typedef struct _CropOptions CropOptions;
struct _CropOptions
{
ToolOptions tool_options;
gboolean layer_only;
gboolean layer_only_d;
GtkWidget *layer_only_w;
gboolean allow_enlarge;
gboolean allow_enlarge_d;
GtkWidget *allow_enlarge_w;
CropType type;
CropType type_d;
GtkWidget *type_w[2];
};
/* the crop tool options */
static CropOptions *crop_options = NULL;
/* the crop tool info dialog */
static InfoDialog *crop_info = NULL;
static gdouble orig_vals[2];
static gdouble size_vals[2];
static GtkWidget *origin_sizeentry;
static GtkWidget *size_sizeentry;
/* Crop type functions */
static void crop_button_press (Tool *, GdkEventButton *, gpointer);
static void crop_button_release (Tool *, GdkEventButton *, gpointer);
static void crop_motion (Tool *, GdkEventMotion *, gpointer);
static void crop_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void crop_control (Tool *, ToolAction, gpointer);
static void crop_arrow_keys_func (Tool *, GdkEventKey *, gpointer);
static void crop_modifier_key_func (Tool *, GdkEventKey *, gpointer);
/* Crop helper functions */
static void crop_recalc (Tool *, Crop *);
static void crop_start (Tool *, Crop *);
static void crop_adjust_guides (GImage *, int, int, int, int);
/* Crop dialog functions */
static void crop_info_update (Tool *);
static void crop_info_create (Tool *);
static void crop_crop_callback (GtkWidget *, gpointer);
static void crop_resize_callback (GtkWidget *, gpointer);
static void crop_close_callback (GtkWidget *, gpointer);
/* Crop area-select functions */
typedef enum
{
AUTO_CROP_NOTHING = 0,
AUTO_CROP_ALPHA = 1,
AUTO_CROP_COLOR = 2
} AutoCropType;
typedef guchar * (*GetColorFunc) (GtkObject *, int, int);
typedef AutoCropType (*ColorsEqualFunc) (guchar *, guchar *, int);
static void crop_selection_callback (GtkWidget *, gpointer);
static void crop_automatic_callback (GtkWidget *, gpointer);
static AutoCropType crop_guess_bgcolor (GtkObject *, GetColorFunc,
int, int, guchar *, int, int, int, int);
static int crop_colors_equal (guchar *, guchar *, int);
static int crop_colors_alpha (guchar *, guchar *, int);
/* Crop dialog callback funtions */
static void crop_orig_changed (GtkWidget *, gpointer);
static void crop_size_changed (GtkWidget *, gpointer);
/* Functions */
static void
crop_options_reset (void)
{
CropOptions *options = crop_options;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->layer_only_w),
options->layer_only_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON(options->allow_enlarge_w),
options->allow_enlarge_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->type_w[options->type_d]), TRUE);
}
static CropOptions *
crop_options_new (void)
{
CropOptions *options;
GtkWidget *vbox;
GtkWidget *frame;
/* the new crop tool options structure */
options = g_new (CropOptions, 1);
tool_options_init ((ToolOptions *) options,
_("Crop & Resize"),
crop_options_reset);
options->layer_only = options->layer_only_d = FALSE;
options->allow_enlarge = options->allow_enlarge_d = FALSE;
options->type = options->type_d = CROP_CROP;
/* the main vbox */
vbox = options->tool_options.main_vbox;
/* layer toggle */
options->layer_only_w =
gtk_check_button_new_with_label(_("Current Layer only"));
gtk_box_pack_start (GTK_BOX (vbox), options->layer_only_w,
FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (options->layer_only_w), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&options->layer_only);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->layer_only_w),
options->layer_only_d);
gtk_widget_show (options->layer_only_w);
/* enlarge toggle */
options->allow_enlarge_w = gtk_check_button_new_with_label (_("Allow Enlarging"));
gtk_box_pack_start (GTK_BOX (vbox), options->allow_enlarge_w,
FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (options->allow_enlarge_w), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&options->allow_enlarge);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->allow_enlarge_w),
options->allow_enlarge_d);
gtk_widget_show (options->allow_enlarge_w);
/* tool toggle */
frame = gimp_radio_group_new2 (TRUE, _("Tool Toggle"),
gimp_radio_button_update,
&options->type, (gpointer) options->type,
_("Crop"), (gpointer) CROP_CROP,
&options->type_w[0],
_("Resize"), (gpointer) RESIZE_CROP,
&options->type_w[1],
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
return options;
}
static void
crop_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
Crop * crop;
GDisplay * gdisp;
gdisp = (GDisplay *) gdisp_ptr;
crop = (Crop *) tool->private;
if (tool->state == INACTIVE ||
gdisp_ptr != tool->gdisp_ptr)
{
crop->function = CREATING;
}
else
{
/* If the cursor is in either the upper left or lower right boxes,
The new function will be to resize the current crop area */
if (bevent->x == CLAMP (bevent->x, crop->x1, crop->x1 + crop->srw) &&
bevent->y == CLAMP (bevent->y, crop->y1, crop->y1 + crop->srh))
crop->function = RESIZING_LEFT;
else if (bevent->x == CLAMP (bevent->x, crop->x2 - crop->srw, crop->x2) &&
bevent->y == CLAMP (bevent->y, crop->y2 - crop->srh, crop->y2))
crop->function = RESIZING_RIGHT;
/* If the cursor is in either the upper right or lower left boxes,
The new function will be to translate the current crop area */
else if ((bevent->x == CLAMP (bevent->x,
crop->x1, crop->x1 + crop->srw) &&
bevent->y == CLAMP (bevent->y,
crop->y2 - crop->srh, crop->y2)) ||
(bevent->x == CLAMP (bevent->x,
crop->x2 - crop->srw, crop->x2) &&
bevent->y == CLAMP (bevent->y,
crop->y1, crop->y1 + crop->srh)))
crop->function = MOVING;
/* If the pointer is in the rectangular region, crop or resize it! */
else if (bevent->x > crop->x1 && bevent->x < crop->x2 &&
bevent->y > crop->y1 && bevent->y < crop->y2)
crop->function = CROPPING;
/* otherwise, the new function will be creating, since we want to start anew */
else
crop->function = CREATING;
}
if (crop->function == CREATING)
{
if (tool->state == ACTIVE)
draw_core_stop (crop->core, tool);
tool->gdisp_ptr = gdisp_ptr;
tool->drawable = gimage_active_drawable (gdisp->gimage);
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
&crop->tx1, &crop->ty1, TRUE, FALSE);
crop->tx2 = crop->tx1;
crop->ty2 = crop->ty1;
crop_start (tool, crop);
}
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
&crop->startx, &crop->starty, TRUE, FALSE);
crop->lastx = crop->startx;
crop->lasty = crop->starty;
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
tool->state = ACTIVE;
}
static void
crop_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
Crop * crop;
GDisplay *gdisp;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) gdisp_ptr;
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), crop->context_id);
if (! (bevent->state & GDK_BUTTON3_MASK))
{
if (crop->function == CROPPING)
{
if (crop_options->type == CROP_CROP)
crop_image (gdisp->gimage, crop->tx1, crop->ty1, crop->tx2, crop->ty2,
crop_options->layer_only, TRUE);
else
crop_image (gdisp->gimage, crop->tx1, crop->ty1, crop->tx2, crop->ty2,
crop_options->layer_only, FALSE);
/* Finish the tool */
crop_close_callback (NULL, NULL);
}
else
crop_info_update (tool);
}
}
static void
crop_adjust_guides (GImage *gimage,
int x1, int y1,
int x2, int y2)
{
GList * glist;
Guide * guide;
gint remove_guide;
for (glist = gimage->guides; glist; glist = g_list_next (glist))
{
guide = (Guide *) glist->data;
remove_guide = FALSE;
switch (guide->orientation)
{
case ORIENTATION_HORIZONTAL:
if ((guide->position < y1) ||(guide->position > y2))
remove_guide = TRUE;
break;
case ORIENTATION_VERTICAL:
if ((guide->position < x1) ||(guide->position > x2))
remove_guide = TRUE;
break;
}
/* edit the guide */
gdisplays_expose_guide (gimage, guide);
gdisplays_flush();
if (remove_guide)
{
guide->position = -1;
guide = NULL;
}
else
{
if (guide->orientation == ORIENTATION_HORIZONTAL)
{
guide->position -= y1 ;
}
else
{
guide->position -= x1;
}
}
}
}
static void
crop_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
Crop * crop;
GDisplay * gdisp;
Layer * layer;
int x1, y1, x2, y2;
int curx, cury;
int inc_x, inc_y;
gchar size[STATUSBAR_SIZE];
int min_x, min_y, max_x, max_y;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) gdisp_ptr;
/* This is the only case when the motion events should be ignored--
we're just waiting for the button release event to crop the image */
if (crop->function == CROPPING)
return;
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &curx, &cury, TRUE, FALSE);
x1 = crop->startx;
y1 = crop->starty;
x2 = curx;
y2 = cury;
inc_x = (x2 - x1);
inc_y = (y2 - y1);
/* If there have been no changes... return */
if (crop->lastx == curx && crop->lasty == cury)
return;
draw_core_pause (crop->core, tool);
if (crop_options->layer_only)
{
layer = (gdisp->gimage)->active_layer;
drawable_offsets (GIMP_DRAWABLE(layer), &min_x, &min_y);
max_x = drawable_width (GIMP_DRAWABLE(layer)) + min_x;
max_y = drawable_height (GIMP_DRAWABLE(layer)) + min_y;
}
else
{
min_x = min_y = 0;
max_x = gdisp->gimage->width;
max_y = gdisp->gimage->height;
}
switch (crop->function)
{
case CREATING :
if (!crop_options->allow_enlarge)
{
x1 = CLAMP (x1, min_x, max_x);
y1 = CLAMP (y1, min_y, max_y);
x2 = CLAMP (x2, min_x, max_x);
y2 = CLAMP (y2, min_y, max_y);
}
break;
case RESIZING_LEFT :
x1 = crop->tx1 + inc_x;
y1 = crop->ty1 + inc_y;
if (!crop_options->allow_enlarge)
{
x1 = CLAMP (x1, min_x, max_x);
y1 = CLAMP (y1, min_y, max_y);
}
x2 = MAX (x1, crop->tx2);
y2 = MAX (y1, crop->ty2);
crop->startx = curx;
crop->starty = cury;
break;
case RESIZING_RIGHT :
x2 = crop->tx2 + inc_x;
y2 = crop->ty2 + inc_y;
if (!crop_options->allow_enlarge)
{
x2 = CLAMP (x2, min_x, max_x);
y2 = CLAMP (y2, min_y, max_y);
}
x1 = MIN (crop->tx1, x2);
y1 = MIN (crop->ty1, y2);
crop->startx = curx;
crop->starty = cury;
break;
case MOVING :
if (!crop_options->allow_enlarge)
{
inc_x = CLAMP (inc_x, min_x - crop->tx1, max_x - crop->tx2);
inc_y = CLAMP (inc_y, min_y - crop->ty1, max_y - crop->ty2);
}
x1 = crop->tx1 + inc_x;
x2 = crop->tx2 + inc_x;
y1 = crop->ty1 + inc_y;
y2 = crop->ty2 + inc_y;
crop->startx = curx;
crop->starty = cury;
break;
}
/* make sure that the coords are in bounds */
crop->tx1 = MIN (x1, x2);
crop->ty1 = MIN (y1, y2);
crop->tx2 = MAX (x1, x2);
crop->ty2 = MAX (y1, y2);
crop->lastx = curx;
crop->lasty = cury;
/* recalculate the coordinates for crop_draw based on the new values */
crop_recalc (tool, crop);
if (crop->function == CREATING ||
crop->function == RESIZING_LEFT || crop->function == RESIZING_RIGHT)
{
gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), crop->context_id);
if (gdisp->dot_for_dot)
{
g_snprintf (size, STATUSBAR_SIZE, gdisp->cursor_format_str,
_("Crop: "),
(crop->tx2 - crop->tx1), " x ", (crop->ty2 - crop->ty1));
}
else /* show real world units */
{
gdouble unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
g_snprintf (size, STATUSBAR_SIZE, gdisp->cursor_format_str,
_("Crop: "),
(gdouble) (crop->tx2 - crop->tx1) * unit_factor /
gdisp->gimage->xresolution,
" x ",
(gdouble) (crop->ty2 - crop->ty1) * unit_factor /
gdisp->gimage->yresolution);
}
gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), crop->context_id,
size);
}
draw_core_resume (crop->core, tool);
}
static void
crop_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
Crop *crop;
GdkCursorType ctype = GIMP_MOUSE_CURSOR;
CursorModifier cmodifier = CURSOR_MODIFIER_NONE;
gdisp = (GDisplay *) gdisp_ptr;
crop = (Crop *) tool->private;
if (tool->state == INACTIVE ||
(tool->state == ACTIVE && tool->gdisp_ptr != gdisp_ptr))
{
ctype = GIMP_CROSSHAIR_SMALL_CURSOR;
}
else if (mevent->x == CLAMP (mevent->x, crop->x1, crop->x1 + crop->srw) &&
mevent->y == CLAMP (mevent->y, crop->y1, crop->y1 + crop->srh))
{
cmodifier = CURSOR_MODIFIER_RESIZE;
}
else if (mevent->x == CLAMP (mevent->x, crop->x2 - crop->srw, crop->x2) &&
mevent->y == CLAMP (mevent->y, crop->y2 - crop->srh, crop->y2))
{
cmodifier = CURSOR_MODIFIER_RESIZE;
}
else if (mevent->x == CLAMP (mevent->x, crop->x1, crop->x1 + crop->srw) &&
mevent->y == CLAMP (mevent->y, crop->y2 - crop->srh, crop->y2))
{
cmodifier = CURSOR_MODIFIER_MOVE;
}
else if (mevent->x == CLAMP (mevent->x, crop->x2 - crop->srw, crop->x2) &&
mevent->y == CLAMP (mevent->y, crop->y1, crop->y1 + crop->srh))
{
cmodifier = CURSOR_MODIFIER_MOVE;
}
else if (! (mevent->x > crop->x1 && mevent->x < crop->x2 &&
mevent->y > crop->y1 && mevent->y < crop->y2))
{
ctype = GIMP_CROSSHAIR_SMALL_CURSOR;
}
gdisplay_install_tool_cursor (gdisp, ctype,
CROP,
cmodifier,
crop_options->type != CROP_CROP);
}
static void
crop_arrow_keys_func (Tool *tool,
GdkEventKey *kevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
Layer *layer;
Crop *crop;
gint inc_x, inc_y;
gint min_x, min_y;
gint max_x, max_y;
gdisp = (GDisplay *) gdisp_ptr;
if (tool->state == ACTIVE)
{
crop = (Crop *) tool->private;
inc_x = inc_y = 0;
switch (kevent->keyval)
{
case GDK_Up : inc_y = -1; break;
case GDK_Left : inc_x = -1; break;
case GDK_Right : inc_x = 1; break;
case GDK_Down : inc_y = 1; break;
}
/* If the shift key is down, move by an accelerated increment */
if (kevent->state & GDK_SHIFT_MASK)
{
inc_y *= ARROW_VELOCITY;
inc_x *= ARROW_VELOCITY;
}
draw_core_pause (crop->core, tool);
if (crop_options->layer_only)
{
layer = (gdisp->gimage)->active_layer;
drawable_offsets (GIMP_DRAWABLE (layer), &min_x, &min_y);
max_x = drawable_width (GIMP_DRAWABLE (layer)) + min_x;
max_y = drawable_height (GIMP_DRAWABLE (layer)) + min_y;
}
else
{
min_x = min_y = 0;
max_x = gdisp->gimage->width;
max_y = gdisp->gimage->height;
}
if (kevent->state & GDK_CONTROL_MASK) /* RESIZING */
{
crop->tx2 = crop->tx2 + inc_x;
crop->ty2 = crop->ty2 + inc_y;
if (!crop_options->allow_enlarge)
{
crop->tx2 = CLAMP (crop->tx2, min_x, max_x);
crop->ty2 = CLAMP (crop->ty2, min_y, max_y);
}
crop->tx1 = MIN (crop->tx1, crop->tx2);
crop->ty1 = MIN (crop->ty1, crop->ty2);
}
else
{
if (!crop_options->allow_enlarge)
{
inc_x = CLAMP (inc_x,
-crop->tx1, gdisp->gimage->width - crop->tx2);
inc_y = CLAMP (inc_y,
-crop->ty1, gdisp->gimage->height - crop->ty2);
}
crop->tx1 += inc_x;
crop->tx2 += inc_x;
crop->ty1 += inc_y;
crop->ty2 += inc_y;
}
crop_recalc (tool, crop);
draw_core_resume (crop->core, tool);
}
}
static void
crop_modifier_key_func (Tool *tool,
GdkEventKey *kevent,
gpointer gdisp_ptr)
{
switch (kevent->keyval)
{
case GDK_Alt_L: case GDK_Alt_R:
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (crop_options->allow_enlarge_w),
!crop_options->allow_enlarge);
break;
case GDK_Shift_L: case GDK_Shift_R:
break;
case GDK_Control_L: case GDK_Control_R:
if (crop_options->type == CROP_CROP)
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (crop_options->type_w[RESIZE_CROP]), TRUE);
else
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (crop_options->type_w[CROP_CROP]), TRUE);
break;
}
}
static void
crop_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
Crop *crop;
crop = (Crop *) tool->private;
switch (action)
{
case PAUSE:
draw_core_pause (crop->core, tool);
break;
case RESUME:
crop_recalc (tool, crop);
draw_core_resume (crop->core, tool);
break;
case HALT:
crop_close_callback (NULL, NULL);
break;
default:
break;
}
}
void
crop_draw (Tool *tool)
{
Crop *crop;
GDisplay *gdisp;
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
#define SRW 10
#define SRH 10
gdk_draw_line (crop->core->win, crop->core->gc,
crop->x1, crop->y1, gdisp->disp_width, crop->y1);
gdk_draw_line (crop->core->win, crop->core->gc,
crop->x1, crop->y1, crop->x1, gdisp->disp_height);
gdk_draw_line (crop->core->win, crop->core->gc,
crop->x2, crop->y2, 0, crop->y2);
gdk_draw_line (crop->core->win, crop->core->gc,
crop->x2, crop->y2, crop->x2, 0);
crop->srw = ((crop->x2 - crop->x1) < SRW) ? (crop->x2 - crop->x1) : SRW;
crop->srh = ((crop->y2 - crop->y1) < SRH) ? (crop->y2 - crop->y1) : SRH;
gdk_draw_rectangle (crop->core->win, crop->core->gc, 1,
crop->x1, crop->y1, crop->srw, crop->srh);
gdk_draw_rectangle (crop->core->win, crop->core->gc, 1,
crop->x2 - crop->srw, crop->y2-crop->srh, crop->srw, crop->srh);
gdk_draw_rectangle (crop->core->win, crop->core->gc, 1,
crop->x2 - crop->srw, crop->y1, crop->srw, crop->srh);
gdk_draw_rectangle (crop->core->win, crop->core->gc, 1,
crop->x1, crop->y2-crop->srh, crop->srw, crop->srh);
#undef SRW
#undef SRH
crop_info_update (tool);
}
Tool *
tools_new_crop (void)
{
Tool *tool;
Crop *private;
/* The tool options */
if (! crop_options)
{
crop_options = crop_options_new ();
tools_register (CROP, (ToolOptions *) crop_options);
}
tool = tools_new_tool (CROP);
private = g_new (Crop, 1);
private->core = draw_core_new (crop_draw);
private->startx = private->starty = 0;
private->function = CREATING;
tool->private = (void *) private;
tool->preserve = FALSE; /* XXX Check me */
tool->button_press_func = crop_button_press;
tool->button_release_func = crop_button_release;
tool->motion_func = crop_motion;
tool->arrow_keys_func = crop_arrow_keys_func;
tool->modifier_key_func = crop_modifier_key_func;
tool->cursor_update_func = crop_cursor_update;
tool->control_func = crop_control;
return tool;
}
void
tools_free_crop (Tool *tool)
{
Crop *crop;
crop = (Crop *) tool->private;
if (tool->state == ACTIVE)
draw_core_stop (crop->core, tool);
if (crop_info)
crop_close_callback (NULL, NULL);
draw_core_free (crop->core);
g_free (crop);
}
void
crop_image (GImage *gimage,
gint x1,
gint y1,
gint x2,
gint y2,
gboolean layer_only,
gboolean crop_layers)
{
Layer *layer;
Layer *floating_layer;
Channel *channel;
GList *guide_list_ptr;
GSList *list;
gint width, height;
gint lx1, ly1, lx2, ly2;
gint off_x, off_y;
gint doff_x, doff_y;
width = x2 - x1;
height = y2 - y1;
/* Make sure new width and height are non-zero */
if (width && height)
{
gimp_add_busy_cursors ();
if (layer_only)
{
undo_push_group_start (gimage, LAYER_RESIZE_UNDO);
layer = gimage->active_layer;
if (layer_is_floating_sel (layer))
floating_sel_relax (layer, TRUE);
drawable_offsets (GIMP_DRAWABLE (layer), &doff_x, &doff_y);
off_x = (doff_x - x1);
off_y = (doff_y - y1);
layer_resize (layer, width, height, off_x, off_y);
if (layer_is_floating_sel (layer))
floating_sel_rigor (layer, TRUE);
undo_push_group_end (gimage);
}
else
{
floating_layer = gimage_floating_sel (gimage);
undo_push_group_start (gimage, CROP_UNDO);
/* relax the floating layer */
if (floating_layer)
floating_sel_relax (floating_layer, TRUE);
/* Push the image size to the stack */
undo_push_gimage_mod (gimage);
/* Set the new width and height */
gimage->width = width;
gimage->height = height;
/* Resize all channels */
list = gimage->channels;
while (list)
{
channel = (Channel *) list->data;
channel_resize (channel, width, height, -x1, -y1);
list = g_slist_next (list);
}
/* Don't forget the selection mask! */
channel_resize (gimage->selection_mask, width, height, -x1, -y1);
gimage_mask_invalidate (gimage);
/* crop all layers */
list = gimage->layers;
while (list)
{
GSList *next;
layer = (Layer *) list->data;
next = g_slist_next (list);
layer_translate (layer, -x1, -y1);
drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
if (crop_layers)
{
drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
lx1 = CLAMP (off_x, 0, gimage->width);
ly1 = CLAMP (off_y, 0, gimage->height);
lx2 = CLAMP ((drawable_width (GIMP_DRAWABLE (layer)) + off_x),
0, gimage->width);
ly2 = CLAMP ((drawable_height (GIMP_DRAWABLE (layer)) + off_y),
0, gimage->height);
width = lx2 - lx1;
height = ly2 - ly1;
if (width && height)
layer_resize (layer, width, height,
-(lx1 - off_x),
-(ly1 - off_y));
else
gimage_remove_layer (gimage, layer);
}
list = next;
}
/* Make sure the projection matches the gimage size */
gimage_projection_realloc (gimage);
/* rigor the floating layer */
if (floating_layer)
floating_sel_rigor (floating_layer, TRUE);
guide_list_ptr = gimage->guides;
while ( guide_list_ptr != NULL)
{
undo_push_guide (gimage, (Guide *)guide_list_ptr->data);
guide_list_ptr = guide_list_ptr->next;
}
undo_push_group_end (gimage);
/* Adjust any guides we might have laying about */
crop_adjust_guides (gimage, x1, y1, x2, y2);
/* shrink wrap and update all views */
channel_invalidate_previews (gimage);
layer_invalidate_previews (gimage);
gimage_invalidate_preview (gimage);
gdisplays_update_full (gimage);
gdisplays_shrink_wrap (gimage);
}
gimp_remove_busy_cursors (NULL);
gdisplays_flush ();
}
}
static void
crop_recalc (Tool *tool,
Crop *crop)
{
GDisplay *gdisp;
gdisp = (GDisplay *) tool->gdisp_ptr;
gdisplay_transform_coords (gdisp, crop->tx1, crop->ty1,
&crop->x1, &crop->y1, FALSE);
gdisplay_transform_coords (gdisp, crop->tx2, crop->ty2,
&crop->x2, &crop->y2, FALSE);
}
static void
crop_start (Tool *tool,
Crop *crop)
{
static GDisplay *old_gdisp = NULL;
GDisplay *gdisp;
gdisp = (GDisplay *) tool->gdisp_ptr;
crop_recalc (tool, crop);
if (! crop_info)
crop_info_create (tool);
gtk_signal_handler_block_by_data (GTK_OBJECT (origin_sizeentry), crop_info);
gtk_signal_handler_block_by_data (GTK_OBJECT (size_sizeentry), crop_info);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (origin_sizeentry), 1,
gdisp->gimage->yresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
0, gdisp->gimage->width);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (origin_sizeentry), 1,
0, gdisp->gimage->height);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (size_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (size_sizeentry), 1,
gdisp->gimage->yresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_sizeentry), 0,
0, gdisp->gimage->width);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_sizeentry), 1,
0, gdisp->gimage->height);
if (old_gdisp != gdisp)
{
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (origin_sizeentry),
gdisp->gimage->unit) ;
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (size_sizeentry),
gdisp->gimage->unit);
if (gdisp->dot_for_dot)
{
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (origin_sizeentry),
GIMP_UNIT_PIXEL);
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (size_sizeentry),
GIMP_UNIT_PIXEL);
}
}
gtk_signal_handler_unblock_by_data (GTK_OBJECT (size_sizeentry), crop_info);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (origin_sizeentry), crop_info);
old_gdisp = gdisp;
/* initialize the statusbar display */
crop->context_id =
gtk_statusbar_get_context_id (GTK_STATUSBAR (gdisp->statusbar), "crop");
gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar),
crop->context_id, _("Crop: 0 x 0"));
draw_core_start (crop->core, gdisp->canvas->window, tool);
}
/***************************/
/* Crop dialog functions */
/***************************/
static void
crop_info_create (Tool *tool)
{
GDisplay *gdisp;
GtkWidget *spinbutton;
GtkWidget *bbox;
GtkWidget *button;
gdisp = (GDisplay *) tool->gdisp_ptr;
/* create the info dialog */
crop_info = info_dialog_new (_("Crop & Resize Information"),
tools_help_func, NULL);
/* create the action area */
gimp_dialog_create_action_area (GTK_DIALOG (crop_info->shell),
_("Crop"), crop_crop_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Resize"), crop_resize_callback,
NULL, NULL, NULL, FALSE, FALSE,
_("Close"), crop_close_callback,
NULL, NULL, NULL, FALSE, FALSE,
NULL);
/* add the information fields */
spinbutton = info_dialog_add_spinbutton (crop_info, _("Origin X:"), NULL,
-1, 1, 1, 10, 1, 1, 2, NULL, NULL);
origin_sizeentry =
info_dialog_add_sizeentry (crop_info, _("Y:"), orig_vals, 1,
gdisp->dot_for_dot ?
GIMP_UNIT_PIXEL : gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE, GIMP_SIZE_ENTRY_UPDATE_SIZE,
crop_orig_changed, crop_info);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (origin_sizeentry),
GTK_SPIN_BUTTON (spinbutton), NULL);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
-65536, 65536);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (origin_sizeentry), 1,
-65536, 65536);
spinbutton = info_dialog_add_spinbutton (crop_info, _("Width:"), NULL,
-1, 1, 1, 10, 1, 1, 2, NULL, NULL);
size_sizeentry =
info_dialog_add_sizeentry (crop_info, _("Height:"), size_vals, 1,
gdisp->dot_for_dot ?
GIMP_UNIT_PIXEL : gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE, GIMP_SIZE_ENTRY_UPDATE_SIZE,
crop_size_changed, crop_info);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (size_sizeentry),
GTK_SPIN_BUTTON (spinbutton), NULL);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (size_sizeentry), 0,
-65536, 65536);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (size_sizeentry), 1,
-65536, 65536);
gtk_table_set_row_spacing (GTK_TABLE (crop_info->info_table), 0, 0);
gtk_table_set_row_spacing (GTK_TABLE (crop_info->info_table), 1, 6);
gtk_table_set_row_spacing (GTK_TABLE (crop_info->info_table), 2, 0);
/* Create the area selection buttons */
bbox = gtk_hbutton_box_new ();
gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_SPREAD);
gtk_button_box_set_spacing (GTK_BUTTON_BOX (bbox), 4);
button = gtk_button_new_with_label (_("From Selection"));
gtk_container_add( GTK_CONTAINER(bbox), button);
gtk_signal_connect(GTK_OBJECT (button) , "clicked",
(GtkSignalFunc) crop_selection_callback, NULL);
gtk_widget_show (button);
button = gtk_button_new_with_label (_("Auto Shrink"));
gtk_container_add(GTK_CONTAINER (bbox), button);
gtk_signal_connect(GTK_OBJECT (button) , "clicked",
(GtkSignalFunc) crop_automatic_callback, NULL);
gtk_widget_show (button);
gtk_box_pack_start (GTK_BOX (crop_info->vbox), bbox, FALSE, FALSE, 2);
gtk_widget_show (bbox);
}
static void
crop_info_update (Tool *tool)
{
Crop *crop;
GDisplay *gdisp;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) tool->gdisp_ptr;
orig_vals[0] = crop->tx1;
orig_vals[1] = crop->ty1;
size_vals[0] = crop->tx2 - crop->tx1;
size_vals[1] = crop->ty2 - crop->ty1;
info_dialog_update (crop_info);
info_dialog_popup (crop_info);
}
static void
crop_crop_callback (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
tool = active_tool;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) tool->gdisp_ptr;
crop_image (gdisp->gimage,
crop->tx1, crop->ty1,
crop->tx2, crop->ty2,
crop_options->layer_only,
TRUE);
/* Finish the tool */
crop_close_callback (NULL, NULL);
}
static void
crop_resize_callback (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
tool = active_tool;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) tool->gdisp_ptr;
crop_image (gdisp->gimage,
crop->tx1, crop->ty1,
crop->tx2, crop->ty2,
crop_options->layer_only,
FALSE);
/* Finish the tool */
crop_close_callback (NULL, NULL);
}
static void
crop_close_callback (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
tool = active_tool;
crop = (Crop *) tool->private;
if (tool->state == ACTIVE)
draw_core_stop (crop->core, tool);
info_dialog_popdown (crop_info);
tool->gdisp_ptr = NULL;
tool->drawable = NULL;
tool->state = INACTIVE;
}
static void
crop_selection_callback (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
Layer *layer;
GDisplay *gdisp;
tool = active_tool;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) tool->gdisp_ptr;
draw_core_pause (crop->core, tool);
if (! gimage_mask_bounds (gdisp->gimage,
&crop->tx1, &crop->ty1, &crop->tx2, &crop->ty2))
{
if (crop_options->layer_only)
{
layer = (gdisp->gimage)->active_layer;
drawable_offsets (GIMP_DRAWABLE (layer), &crop->tx1, &crop->ty1);
crop->tx2 = drawable_width (GIMP_DRAWABLE (layer)) + crop->tx1;
crop->ty2 = drawable_height (GIMP_DRAWABLE (layer)) + crop->ty1;
}
else
{
crop->tx1 = crop->ty1 = 0;
crop->tx2 = gdisp->gimage->width;
crop->ty2 = gdisp->gimage->height;
}
}
crop_recalc (tool, crop);
draw_core_resume (crop->core, tool);
}
static void
crop_automatic_callback (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
GimpDrawable *active_drawable = NULL;
GetColorFunc get_color_func;
ColorsEqualFunc colors_equal_func;
GtkObject *get_color_obj;
guchar bgcolor[4] = {0, 0, 0, 0};
gboolean has_alpha = FALSE;
PixelRegion PR;
guchar *buffer = NULL;
gint offset_x, offset_y, width, height, bytes;
gint x, y, abort;
gint x1, y1, x2, y2;
tool = active_tool;
crop = (Crop *) tool->private;
gdisp = (GDisplay *) tool->gdisp_ptr;
draw_core_pause (crop->core, tool);
gimp_add_busy_cursors ();
/* You should always keep in mind that crop->tx2 and crop->ty2 are the NOT the
coordinates of the bottomright corner of the area to be cropped. They point
at the pixel located one to the right and one to the bottom.
*/
if (crop_options->layer_only)
{
if (!(active_drawable = gimage_active_drawable (gdisp->gimage)))
return;
width = drawable_width (GIMP_DRAWABLE (active_drawable));
height = drawable_height (GIMP_DRAWABLE (active_drawable));
bytes = drawable_bytes (GIMP_DRAWABLE (active_drawable));
if (drawable_has_alpha (GIMP_DRAWABLE (active_drawable)))
has_alpha = TRUE;
get_color_obj = GTK_OBJECT (active_drawable);
get_color_func = (GetColorFunc) gimp_drawable_get_color_at;
drawable_offsets (GIMP_DRAWABLE (active_drawable), &offset_x, &offset_y);
}
else
{
width = gdisp->gimage->width;
height = gdisp->gimage->height;
has_alpha = TRUE;
bytes = gimp_image_composite_bytes (gdisp->gimage);
get_color_obj = GTK_OBJECT (gdisp->gimage);
get_color_func = (GetColorFunc) gimp_image_get_color_at;
offset_x = offset_y = 0;
}
x1 = crop->tx1 - offset_x > 0 ? crop->tx1 - offset_x : 0;
x2 = crop->tx2 - offset_x < width ? crop->tx2 - offset_x : width;
y1 = crop->ty1 - offset_y > 0 ? crop->ty1 - offset_y : 0;
y2 = crop->ty2 - offset_y < height ? crop->ty2 - offset_y : height;
switch (crop_guess_bgcolor (get_color_obj, get_color_func, bytes, has_alpha,
bgcolor, x1, x2-1, y1, y2-1))
{
case AUTO_CROP_ALPHA:
colors_equal_func = (ColorsEqualFunc) crop_colors_alpha;
break;
case AUTO_CROP_COLOR:
colors_equal_func = (ColorsEqualFunc) crop_colors_equal;
break;
default:
goto FINISH;
}
width = x2 - x1;
height = y2 - y1;
if (crop_options->layer_only)
pixel_region_init (&PR, drawable_data (active_drawable),
x1, y1, width, height, FALSE);
else
pixel_region_init (&PR, gimp_image_composite (gdisp->gimage),
x1, y1, width, height, FALSE);
/* The following could be optimized further by processing the smaller side first
instead of defaulting to width --Sven
*/
buffer = g_malloc ((width > height ? width : height) * bytes);
/* Check how many of the top lines are uniform/transparent. */
abort = FALSE;
for (y = y1; y < y2 && !abort; y++)
{
pixel_region_get_row (&PR, x1, y, width, buffer, 1);
for (x = 0; x < width && !abort; x++)
abort = !(colors_equal_func) (bgcolor, buffer + x * bytes, bytes);
}
if (y == y2 && !abort)
goto FINISH;
y1 = y - 1;
/* Check how many of the bottom lines are uniform/transparent. */
abort = FALSE;
for (y = y2; y > y1 && !abort; y--)
{
pixel_region_get_row (&PR, x1, y-1 , width, buffer, 1);
for (x = 0; x < width && !abort; x++)
abort = !(colors_equal_func) (bgcolor, buffer + x * bytes, bytes);
}
y2 = y + 1;
/* compute a new height for the next operations */
height = y2 - y1;
/* Check how many of the left lines are uniform/transparent. */
abort = FALSE;
for (x = x1; x < x2 && !abort; x++)
{
pixel_region_get_col (&PR, x, y1, height, buffer, 1);
for (y = 0; y < height && !abort; y++)
abort = !(colors_equal_func) (bgcolor, buffer + y * bytes, bytes);
}
x1 = x - 1;
/* Check how many of the right lines are uniform/transparent. */
abort = FALSE;
for (x = x2; x > x1 && !abort; x--)
{
pixel_region_get_col (&PR, x-1, y1, height, buffer, 1);
for (y = 0; y < height && !abort; y++)
abort = !(colors_equal_func) (bgcolor, buffer + y * bytes, bytes);
}
x2 = x + 1;
crop->tx1 = offset_x + x1;
crop->tx2 = offset_x + x2;
crop->ty1 = offset_y + y1;
crop->ty2 = offset_y + y2;
crop_recalc (tool, crop);
FINISH:
g_free (buffer);
gimp_remove_busy_cursors (NULL);
draw_core_resume (crop->core, tool);
return;
}
static AutoCropType
crop_guess_bgcolor (GtkObject *get_color_obj,
GetColorFunc get_color_func,
gint bytes,
gboolean has_alpha,
guchar *color,
gint x1,
gint x2,
gint y1,
gint y2)
{
guchar *tl = NULL;
guchar *tr = NULL;
guchar *bl = NULL;
guchar *br = NULL;
gint i, alpha;
for (i = 0; i < bytes; i++)
color[i] = 0;
/* First check if there's transparency to crop. If not, guess the
* background-color to see if at least 2 corners are equal.
*/
if (!(tl = (*get_color_func) (get_color_obj, x1, y1)))
goto ERROR;
if (!(tr = (*get_color_func) (get_color_obj, x1, y2)))
goto ERROR;
if (!(bl = (*get_color_func) (get_color_obj, x2, y1)))
goto ERROR;
if (!(br = (*get_color_func) (get_color_obj, x2, y2)))
goto ERROR;
if (has_alpha)
{
alpha = bytes - 1;
if ((tl[alpha] == 0 && tr[alpha] == 0) ||
(tl[alpha] == 0 && bl[alpha] == 0) ||
(tr[alpha] == 0 && br[alpha] == 0) ||
(bl[alpha] == 0 && br[alpha] == 0))
{
g_free (tl);
g_free (tr);
g_free (bl);
g_free (br);
return AUTO_CROP_ALPHA;
}
}
if (crop_colors_equal (tl, tr, bytes) || crop_colors_equal (tl, bl, bytes))
memcpy (color, tl, bytes);
else if (crop_colors_equal (br, bl, bytes) || crop_colors_equal (br, tr, bytes))
memcpy (color, br, bytes);
else
goto ERROR;
g_free (tl);
g_free (tr);
g_free (bl);
g_free (br);
return AUTO_CROP_COLOR;
ERROR:
g_free (tl);
g_free (tr);
g_free (bl);
g_free (br);
return AUTO_CROP_NOTHING;
}
static int
crop_colors_equal (guchar *col1,
guchar *col2,
gint bytes)
{
gboolean equal = TRUE;
gint b;
for (b = 0; b < bytes; b++)
{
if (col1[b] != col2[b])
{
equal = FALSE;
break;
}
}
return equal;
}
static gboolean
crop_colors_alpha (guchar *dummy,
guchar *col,
gint bytes)
{
if (col[bytes-1] == 0)
return TRUE;
else
return FALSE;
}
static void
crop_orig_changed (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
gint ox;
gint oy;
tool = active_tool;
if (tool && active_tool->type == CROP)
{
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
ox = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
oy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
if ((ox != crop->tx1) ||
(oy != crop->ty1))
{
draw_core_pause (crop->core, tool);
crop->tx2 = crop->tx2 + (ox - crop->tx1);
crop->tx1 = ox;
crop->ty2 = crop->ty2 + (oy - crop->ty1);
crop->ty1 = oy;
crop_recalc (tool, crop);
draw_core_resume (crop->core, tool);
}
}
}
static void
crop_size_changed (GtkWidget *widget,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
gint sx;
gint sy;
tool = active_tool;
if (tool && active_tool->type == CROP)
{
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
sx = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
sy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
if ((sx != (crop->tx2 - crop->tx1)) ||
(sy != (crop->ty2 - crop->ty1)))
{
draw_core_pause (crop->core, tool);
crop->tx2 = sx + crop->tx1;
crop->ty2 = sy + crop->ty1;
crop_recalc (tool, crop);
draw_core_resume (crop->core, tool);
}
}
}
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