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gimp/app/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 "actionarea.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 "info_dialog.h"
#include "tool_options_ui.h"
#include "undo.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 */
int startx; /* starting x coord */
int starty; /* starting y coord */
int lastx; /* previous x coord */
int lasty; /* previous y coord */
int x1, y1; /* upper left hand coordinate */
int x2, y2; /* lower right hand coords */
int srw, srh; /* width and height of corners */
int tx1, ty1; /* transformed coords */
int tx2, ty2; /* */
int function; /* moving or resizing */
guint context_id; /* for the statusbar */
};
typedef struct _CropOptions CropOptions;
struct _CropOptions
{
ToolOptions tool_options;
int layer_only;
int layer_only_d;
GtkWidget *layer_only_w;
int allow_enlarge;
int 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 gfloat orig_vals[2];
static gfloat 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 *, int, 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, int, int, guchar *);
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;
gchar* type_label[2] = { N_("Crop"), N_("Resize") };
gint type_value[2] = { CROP_CROP, RESIZE_CROP };
/* the new crop tool options structure */
options = (CropOptions *) g_malloc (sizeof (CropOptions));
tool_options_init ((ToolOptions *) options,
_("Crop & Resize Options"),
crop_options_reset);
options->layer_only = options->layer_only_d = FALSE;
options->allow_enlarge = options->allow_enlarge_d = TRUE;
options->type = options->type_d = RESIZE_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",
(GtkSignalFunc) tool_options_toggle_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",
(GtkSignalFunc) tool_options_toggle_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 = tool_options_radio_buttons_new (_("Tool Toggle"),
&options->type,
options->type_w,
type_label,
type_value,
2);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->type_w[options->type_d]), TRUE);
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)
crop->function = CREATING;
else if (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 == BOUNDS (bevent->x, crop->x1, crop->x1 + crop->srw) &&
bevent->y == BOUNDS (bevent->y, crop->y1, crop->y1 + crop->srh))
crop->function = RESIZING_LEFT;
else if (bevent->x == BOUNDS (bevent->x, crop->x2 - crop->srw, crop->x2) &&
bevent->y == BOUNDS (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 == BOUNDS (bevent->x, crop->x1, crop->x1 + crop->srw) &&
bevent->y == BOUNDS (bevent->y, crop->y2 - crop->srh, crop->y2)) ||
(bevent->x == BOUNDS (bevent->x, crop->x2 - crop->srw, crop->x2) &&
bevent->y == BOUNDS (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;
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 */
draw_core_stop (crop->core, tool);
info_dialog_popdown (crop_info);
tool->state = INACTIVE;
}
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;
/* initialize the traverser */
glist = gimage->guides;
while (glist != NULL) {
guide = (Guide *) glist->data;
remove_guide = FALSE;
switch (guide->orientation) {
case HORIZONTAL_GUIDE:
if ((guide->position < y1) ||(guide->position > y2))
remove_guide = TRUE;
break;
case VERTICAL_GUIDE:
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 == HORIZONTAL_GUIDE) {
guide->position -= y1 ;
}
else {
guide->position -= x1;
}
}
glist = glist->next;
}
}
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 = BOUNDS (x1, min_x, max_x);
y1 = BOUNDS (y1, min_y, max_y);
x2 = BOUNDS (x2, min_x, max_x);
y2 = BOUNDS (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 = BOUNDS (x1, min_x, max_x);
y1 = BOUNDS (y1, min_y, max_y);
}
x2 = MAXIMUM (x1, crop->tx2);
y2 = MAXIMUM (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 = BOUNDS (x2, min_x, max_x);
y2 = BOUNDS (y2, min_y, max_y);
}
x1 = MINIMUM (crop->tx1, x2);
y1 = MINIMUM (crop->ty1, y2);
crop->startx = curx;
crop->starty = cury;
break;
case MOVING :
if (!crop_options->allow_enlarge)
{
inc_x = BOUNDS (inc_x, min_x - crop->tx1, max_x - crop->tx2);
inc_y = BOUNDS (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 = MINIMUM (x1, x2);
crop->ty1 = MINIMUM (y1, y2);
crop->tx2 = MAXIMUM (x1, x2);
crop->ty2 = MAXIMUM (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 */
{
float unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
g_snprintf (size, STATUSBAR_SIZE, gdisp->cursor_format_str,
_("Crop: "),
(float)(crop->tx2 - crop->tx1) * unit_factor /
gdisp->gimage->xresolution,
" x ",
(float)(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;
GdkCursorType ctype;
Crop * crop;
gdisp = (GDisplay *) gdisp_ptr;
crop = (Crop *) tool->private;
if (tool->state == INACTIVE ||
(tool->state == ACTIVE && tool->gdisp_ptr != gdisp_ptr))
ctype = GDK_CROSS;
else if (mevent->x == BOUNDS (mevent->x, crop->x1, crop->x1 + crop->srw) &&
mevent->y == BOUNDS (mevent->y, crop->y1, crop->y1 + crop->srh))
ctype = GDK_TOP_LEFT_CORNER;
else if (mevent->x == BOUNDS (mevent->x, crop->x2 - crop->srw, crop->x2) &&
mevent->y == BOUNDS (mevent->y, crop->y2 - crop->srh, crop->y2))
ctype = GDK_BOTTOM_RIGHT_CORNER;
else if (mevent->x == BOUNDS (mevent->x, crop->x1, crop->x1 + crop->srw) &&
mevent->y == BOUNDS (mevent->y, crop->y2 - crop->srh, crop->y2))
ctype = GDK_FLEUR;
else if (mevent->x == BOUNDS (mevent->x, crop->x2 - crop->srw, crop->x2) &&
mevent->y == BOUNDS (mevent->y, crop->y1, crop->y1 + crop->srh))
ctype = GDK_FLEUR;
else if (mevent->x > crop->x1 && mevent->x < crop->x2 &&
mevent->y > crop->y1 && mevent->y < crop->y2)
{
if ( crop_options->type == CROP_CROP )
ctype = GDK_ICON;
else
ctype = GDK_SIZING;
}
else
ctype = GDK_CROSS;
gdisplay_install_tool_cursor (gdisp, ctype);
}
static void
crop_arrow_keys_func (Tool *tool,
GdkEventKey *kevent,
gpointer gdisp_ptr)
{
int inc_x, inc_y;
GDisplay * gdisp;
Layer * layer;
Crop * crop;
int min_x, min_y, 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 = BOUNDS (crop->tx2, min_x, max_x);
crop->ty2 = BOUNDS (crop->ty2, min_y, max_y);
}
crop->tx1 = MINIMUM (crop->tx1, crop->tx2);
crop->ty1 = MINIMUM (crop->ty1, crop->ty2);
}
else
{
if (!crop_options->allow_enlarge)
{
inc_x = BOUNDS (inc_x, -crop->tx1, gdisp->gimage->width - crop->tx2);
inc_y = BOUNDS (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:
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;
case GDK_Control_L: case GDK_Control_R:
break;
}
}
static void
crop_control (Tool *tool,
int 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 :
draw_core_stop (crop->core, tool);
info_dialog_popdown (crop_info);
break;
}
}
void
crop_draw (Tool *tool)
{
Crop * crop;
GDisplay * gdisp;
#define SRW 10
#define SRH 10
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
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);
crop_info_update (tool);
}
Tool *
tools_new_crop ()
{
Tool * tool;
Crop * private;
/* The tool options */
if (! crop_options)
{
crop_options = crop_options_new ();
tools_register (CROP, (ToolOptions *) crop_options);
}
tool = (Tool *) g_malloc (sizeof (Tool));
private = (Crop *) g_malloc (sizeof (Crop));
private->core = draw_core_new (crop_draw);
private->startx = private->starty = 0;
private->function = CREATING;
tool->type = CROP;
tool->state = INACTIVE;
tool->scroll_lock = 0; /* Allow scrolling */
tool->auto_snap_to = TRUE;
tool->private = (void *) private;
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;
tool->preserve = TRUE; /* XXX Check me */
return tool;
}
void
tools_free_crop (Tool *tool)
{
Crop * crop;
crop = (Crop *) tool->private;
if (tool->state == ACTIVE)
draw_core_stop (crop->core, tool);
draw_core_free (crop->core);
if (crop_info)
{
info_dialog_popdown (crop_info);
crop_info = NULL;
}
g_free (crop);
}
void
crop_image (GImage *gimage,
int x1,
int y1,
int x2,
int y2,
int layer_only,
int crop_layers)
{
Layer *layer;
Layer *floating_layer;
Channel *channel;
GList *guide_list_ptr;
GSList *list;
int width, height;
int lx1, ly1, lx2, ly2;
int off_x, off_y;
int 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 = BOUNDS (off_x, 0, gimage->width);
ly1 = BOUNDS (off_y, 0, gimage->height);
lx2 = BOUNDS ((drawable_width (GIMP_DRAWABLE (layer)) + off_x), 0, gimage->width);
ly2 = BOUNDS ((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);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
0, gdisp->gimage->width);
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), 1,
0, gdisp->gimage->height);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (size_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_sizeentry), 0,
0, gdisp->gimage->width);
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), 1,
0, gdisp->gimage->height);
if (old_gdisp != gdisp)
{
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (origin_sizeentry),
(gdisp->dot_for_dot ? UNIT_PIXEL :
gdisp->gimage->unit));
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (size_sizeentry),
(gdisp->dot_for_dot ? UNIT_PIXEL :
gdisp->gimage->unit));
}
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 ActionAreaItem action_items[3] =
{
{ N_("Crop"), crop_crop_callback, NULL, NULL },
{ N_("Resize"), crop_resize_callback, NULL, NULL },
{ N_("Close"), crop_close_callback, NULL, NULL },
};
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"));
/* 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 ?
UNIT_PIXEL : gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE, GIMP_SIZE_ENTRY_UPDATE_SIZE,
crop_orig_changed, tool);
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_resolution (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
0, gdisp->gimage->width);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (origin_sizeentry), 0,
orig_vals[0]);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (origin_sizeentry), 1,
-65536, 65536);
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), 1,
0, gdisp->gimage->height);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (origin_sizeentry), 1,
orig_vals[1]);
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 ?
UNIT_PIXEL : gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE, GIMP_SIZE_ENTRY_UPDATE_SIZE,
crop_size_changed, tool);
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_resolution (GIMP_SIZE_ENTRY (size_sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_sizeentry), 0,
0, gdisp->gimage->width);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (size_sizeentry), 0, size_vals[0]);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (size_sizeentry), 1,
-65536, 65536);
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), 1,
0, gdisp->gimage->height);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (size_sizeentry), 1, size_vals[1]);
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 (_("Automatic"));
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);
/* Create the action area */
build_action_area (GTK_DIALOG (crop_info->shell), action_items, 3, 0);
}
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 *w,
gpointer client_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 */
draw_core_stop (crop->core, tool);
info_dialog_popdown (crop_info);
tool->state = INACTIVE;
}
static void
crop_resize_callback (GtkWidget *w,
gpointer client_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 */
draw_core_stop (crop->core, tool);
info_dialog_popdown (crop_info);
tool->state = INACTIVE;
}
static void
crop_selection_callback (GtkWidget *w,
gpointer client_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 *w,
gpointer client_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};
gint has_alpha = FALSE;
PixelRegion PR;
guchar *buffer;
gint 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 ();
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), &crop->tx1, &crop->ty1);
crop->tx2 = width + crop->tx1;
crop->ty2 = height + crop->ty1;
}
else
{
width = gdisp->gimage->width;
height = gdisp->gimage->height;
get_color_obj = GTK_OBJECT (gdisp->gimage);
get_color_func = (GetColorFunc) gimp_image_get_color_at;
bytes = gimp_image_composite_bytes (gdisp->gimage);
has_alpha = TRUE;
crop->tx1 = crop->ty1 = 0;
crop->tx2 = width;
crop->ty2 = height;
}
switch (crop_guess_bgcolor (get_color_obj, get_color_func, width, height, bytes, has_alpha, bgcolor))
{
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;
}
if (crop_options->layer_only)
pixel_region_init (&PR, drawable_data (active_drawable), 0, 0, width, height, FALSE);
else
pixel_region_init (&PR, gimp_image_composite (gdisp->gimage), 0, 0, width, height, FALSE);
buffer = g_malloc((width > height ? width : height) * bytes);
x1 = x2 = y1 = y2 = 0;
/* Check how many of the top lines are uniform/transparent. */
abort = FALSE;
for (y = 0; y < height && !abort; y++)
{
pixel_region_get_row (&PR, 0, y, width, buffer, 1);
for (x = 0; x < width && !abort; x++)
abort = !(colors_equal_func) (bgcolor, buffer + x * bytes, bytes);
}
if (y == height && !abort) {
g_free (buffer);
goto FINISH;
}
y1 = y - 1;
/* Check how many of the bottom lines are uniform/transparent. */
abort = FALSE;
for (y = height - 1; y >= y1 && !abort; y--)
{
pixel_region_get_row (&PR, 0, y, width, buffer, 1);
for (x = 0; x < width && !abort; x++)
abort = !(colors_equal_func) (bgcolor, buffer + x * bytes, bytes);
}
y2 = y + 1;
/* Check how many of the left lines are uniform/transparent. */
abort = FALSE;
for (x = 0; x < width && !abort; x++)
{
pixel_region_get_col (&PR, x, y1, y2 - y1 + 1, buffer, 1);
for (y = 0; y <= (y2 - y1) && !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 = width - 1; x >= x1 && !abort; x--)
{
pixel_region_get_col (&PR, x, y1, y2 - y1 + 1, buffer, 1);
for (y = 0; y <= (y2 - y1) && !abort; y++)
abort = !(colors_equal_func) (bgcolor, buffer + y * bytes, bytes);
}
x2 = x + 1;
g_free (buffer);
crop->tx2 = crop->tx1 + x2 + 1;
crop->ty2 = crop->ty1 + y2 + 1;
crop->tx1 += x1;
crop->ty1 += y1;
FINISH:
crop_recalc (tool, crop);
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,
int width,
int height,
int bytes,
int has_alpha,
guchar *color)
{
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, 0, 0)))
goto ERROR;
if (!(tr = (*get_color_func) (get_color_obj, width - 1, 0)))
goto ERROR;
if (!(bl = (*get_color_func) (get_color_obj, 0, height - 1)))
goto ERROR;
if (!(br = (*get_color_func) (get_color_obj, width - 1, height - 1)))
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,
int bytes)
{
int equal = TRUE;
int b;
for (b = 0; b < bytes; b++) {
if (col1[b] != col2[b]) {
equal = FALSE;
break;
}
}
return equal;
}
static int
crop_colors_alpha (guchar *dummy,
guchar *col,
int bytes)
{
if (col[bytes-1] == 0)
return TRUE;
else
return FALSE;
}
static void
crop_close_callback (GtkWidget *w,
gpointer client_data)
{
Tool * tool;
tool = active_tool;
draw_core_stop (((Crop *) tool->private)->core, tool);
info_dialog_popdown (crop_info);
tool->state = INACTIVE;
}
static void
crop_orig_changed (GtkWidget *w,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
int ox;
int oy;
tool = (Tool *)data;
if (tool)
{
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
ox = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 0);
oy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 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 *w,
gpointer data)
{
Tool *tool;
Crop *crop;
GDisplay *gdisp;
int sx;
int sy;
tool = (Tool *)data;
if (tool)
{
gdisp = (GDisplay *) tool->gdisp_ptr;
crop = (Crop *) tool->private;
sx = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 0);
sy = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 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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