gimp/plug-ins/common/rotate.c

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/*
* Rotate plug-in v0.7 by Sven Neumann, neumanns@uni-duesseldorf.de
* 1998/05/28
*
* Any suggestions, bug-reports or patches are very welcome.
*
* A lot of changes in version 0.3 were inspired by (or even simply
* copied from) the similar rotators-plug-in by Adam D. Moss.
*
* As I still prefer my version I have not stopped developing it.
* Probably this will result in one plug-in that includes the advantages
* of both approaches.
*/
/* 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.
*/
/* Revision history
* (09/28/97) v0.1 first development release
* (09/29/97) v0.2 nicer dialog,
* changed the menu-location to Filters/Transforms
* (10/01/97) v0.3 now handles layered images and undo
* (10/13/97) v0.3a small bugfix, no real changes
* (10/17/97) v0.4 now handles selections
* (01/09/98) v0.5 a few fixes to support portability
* (01/15/98) v0.6 fixed a line that caused rotate to crash on some
* systems
* (05/28/98) v0.7 use the new gimp_message function for error output
*/
/* TODO List
* - handle channels and masks
* - rewrite the main function to make it work on tiles rather than
* process the image row by row. This should result in a significant
* speedup (thanks to quartic for this suggestion).
*/
#include <stdlib.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
/* Defines */
#define PLUG_IN_NAME "plug_in_rotate"
#define PLUG_IN_PRINT_NAME "Rotate"
#define PLUG_IN_VERSION "v0.6 (01/15/98)"
#define PLUG_IN_MENU_PATH "<Image>/Image/Transforms/Rotate"
#define PLUG_IN_IMAGE_TYPES "RGB*, INDEXED*, GRAY*"
#define PLUG_IN_AUTHOR "Sven Neumann (neumanns@uni-duesseldorf.de)"
#define PLUG_IN_COPYRIGHT "Sven Neumann"
#define PLUG_IN_DESCRIBTION "Rotates a layer or the whole image by 90, 180 or 270 degrees"
#define PLUG_IN_HELP "This plug-in does rotate the active layer or the whole image clockwise by multiples of 90 degrees. When the whole image is choosen, the image is resized if necessary."
#define NUMBER_IN_ARGS 5
#define IN_ARGS { PARAM_INT32, "run_mode", "Interactive, non-interactive"},\
{ PARAM_IMAGE, "image", "Input image" },\
{ PARAM_DRAWABLE, "drawable", "Input drawable"},\
{ PARAM_INT32, "angle", "Angle { 90 (1), 180 (2), 270 (3) } degrees"},\
{ PARAM_INT32, "everything", "Rotate the whole image? { TRUE, FALSE }"}
#define NUMBER_OUT_ARGS 0
#define OUT_ARGS NULL
#define NUM_ANGLES 4
gchar *angle_label[NUM_ANGLES] = { "0", "90", "180", "270" };
typedef struct {
gint angle;
gint everything;
} RotateValues;
typedef struct {
gint run;
} RotateInterface;
static RotateValues rotvals =
{
1, /* default to 90 degrees */
1 /* default to whole image */
};
static RotateInterface rotint =
{
FALSE /* run */
};
static void query (void);
static void run (gchar *name,
gint nparams, /* number of parameters passed in */
GParam * param, /* parameters passed in */
gint *nreturn_vals, /* number of parameters returned */
GParam ** return_vals); /* parameters to be returned */
static void rotate (void);
static void rotate_drawable (GDrawable *drawable);
static void rotate_compute_offsets (gint *offsetx,
gint *offsety,
gint image_width, gint image_height,
gint width, gint height);
static gint rotate_dialog (void);
static void rotate_close_callback (GtkWidget *widget,
gpointer data);
static void rotate_ok_callback (GtkWidget *widget,
gpointer data);
static void rotate_toggle_update (GtkWidget *widget,
gpointer data);
gint32 my_gimp_selection_float (gint32 image_ID, gint32 drawable_ID);
gint32 my_gimp_selection_is_empty (gint32 image_ID);
/* Global Variables */
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
/* the image and drawable that will be used later */
GDrawable *active_drawable = NULL;
gint32 image_ID = -1;
/* Functions */
MAIN ()
static void query (void)
{
static GParamDef args[] = { IN_ARGS };
static gint nargs = NUMBER_IN_ARGS;
static GParamDef *return_vals = OUT_ARGS;
static gint nreturn_vals = NUMBER_OUT_ARGS;
/* the actual installation of the plugin */
gimp_install_procedure (PLUG_IN_NAME,
PLUG_IN_DESCRIBTION,
PLUG_IN_HELP,
PLUG_IN_AUTHOR,
PLUG_IN_COPYRIGHT,
PLUG_IN_VERSION,
PLUG_IN_MENU_PATH,
PLUG_IN_IMAGE_TYPES,
PROC_PLUG_IN,
nargs,
nreturn_vals,
args,
return_vals);
}
static void
run (gchar *name, /* name of plugin */
gint nparams, /* number of in-paramters */
GParam * param, /* in-parameters */
gint *nreturn_vals, /* number of out-parameters */
GParam ** return_vals) /* out-parameters */
{
/* Get the runmode from the in-parameters */
GRunModeType run_mode = param[0].data.d_int32;
/* status variable, use it to check for errors in invocation usualy only
during non-interactive calling */
GStatusType status = STATUS_SUCCESS;
/*always return at least the status to the caller. */
static GParam values[1];
/* initialize the return of the status */
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
/* get image and drawable */
image_ID = param[1].data.d_int32;
active_drawable = gimp_drawable_get (param[2].data.d_drawable);
/*how are we running today? */
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data from a previous run */
gimp_get_data (PLUG_IN_NAME, &rotvals);
rotvals.angle = rotvals.angle % NUM_ANGLES;
/* Get information from the dialog */
if (!rotate_dialog())
return;
break;
case RUN_NONINTERACTIVE:
/* check to see if invoked with the correct number of parameters */
if (nparams == NUMBER_IN_ARGS)
{
rotvals.angle = (gint) param[3].data.d_int32;
rotvals.angle = rotvals.angle % NUM_ANGLES;
rotvals.everything = (gint) param[4].data.d_int32;
}
else
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data from a previous run */
gimp_get_data (PLUG_IN_NAME, &rotvals);
rotvals.angle = rotvals.angle % NUM_ANGLES;
break;
default:
break;
} /* switch */
if (status == STATUS_SUCCESS)
{
/* Set the number of tiles you want to cache */
/* gimp_tile_cache_ntiles ( ); */
/* Run the main function */
rotate();
/* If run mode is interactive, flush displays, else (script) don't
do it, as the screen updates would make the scripts slow */
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store variable states for next run */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_NAME, &rotvals, sizeof (RotateValues));
}
values[0].data.d_status = status;
}
/* Some helper functions */
gint32
my_gimp_selection_is_empty (gint32 image_ID)
{
GParam *return_vals;
gint nreturn_vals;
gint32 is_empty;
/* initialize */
is_empty = 0;
return_vals = gimp_run_procedure ("gimp_selection_is_empty",
&nreturn_vals,
PARAM_IMAGE, image_ID,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
is_empty = return_vals[1].data.d_int32;
gimp_destroy_params (return_vals, nreturn_vals);
return is_empty;
}
gint32
my_gimp_selection_float (gint32 image_ID, gint32 drawable_ID)
{
GParam *return_vals;
gint nreturn_vals;
gint32 layer_ID;
return_vals = gimp_run_procedure ("gimp_selection_float",
&nreturn_vals,
PARAM_IMAGE, image_ID,
PARAM_DRAWABLE, drawable_ID,
PARAM_INT32, 0,
PARAM_INT32, 0,
PARAM_END);
layer_ID= 0;
if (return_vals[0].data.d_status == STATUS_SUCCESS)
layer_ID = return_vals[1].data.d_layer;
gimp_destroy_params (return_vals, nreturn_vals);
return layer_ID;
}
static void
rotate_compute_offsets (gint* offsetx,
gint* offsety,
gint image_width, gint image_height,
gint width, gint height)
{
gint buffer;
if (rotvals.everything) /* rotate around the image center */
{
switch ( rotvals.angle )
{
case 1: /* 90<39> */
buffer = *offsetx;
*offsetx = image_height - *offsety - height;
*offsety = buffer;
break;
case 2: /* 180<38> */
*offsetx = image_width - *offsetx - width;
*offsety = image_height - *offsety - height;
break;
case 3: /* 270<37> */
buffer = *offsetx;
*offsetx = *offsety;
*offsety = image_width - buffer - width;
}
}
else /* rotate around the drawable center */
{
if (rotvals.angle != 2)
{
*offsetx = *offsetx + (width-height)/2 ;
*offsety = *offsety + (height-width)/2 ;
}
}
return;
}
static void
rotate_drawable (GDrawable *drawable)
{
GPixelRgn srcPR, destPR;
gint width, height, longside, bytes;
gint row, col, byte;
gint offsetx, offsety;
gint was_preserve_transparency = FALSE;
guchar *buffer, *src_row, *dest_row;
/* initialize */
row = 0;
/* Get the size of the input drawable. */
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
if (gimp_layer_get_preserve_transparency(drawable->id))
{
was_preserve_transparency = TRUE;
gimp_layer_set_preserve_transparency ( drawable->id,FALSE );
}
if (rotvals.angle == 2) /* we're rotating by 180<38> */
{
if ( !gimp_drawable_layer(drawable->id) ) exit;
/* not a layer, probably a channel, abort operation */
gimp_tile_cache_ntiles ( 2*((width/gimp_tile_width())+1) );
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height,
FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height,
TRUE, TRUE);
src_row = (guchar *) g_malloc (width * bytes);
dest_row = (guchar *) g_malloc (width * bytes);
for (row = 0; row < height; row++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, 0, row, width);
for (col = 0; col < width; col++)
{
for (byte = 0; byte < bytes; byte++)
{
dest_row[col * bytes + byte] =
src_row[(width - col - 1) * bytes + byte];
}
}
gimp_pixel_rgn_set_row (&destPR, dest_row, 0, (height - row - 1),
width);
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) height);
}
g_free (src_row);
g_free (dest_row);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, 0, 0, width, height);
}
else /* we're rotating by 90<39> or 270<37> */
{
(width > height) ? (longside = width) : (longside = height);
if ( gimp_drawable_layer(drawable->id) )
{
gimp_layer_resize(drawable->id, longside, longside, 0, 0);
gimp_drawable_flush (drawable);
drawable = gimp_drawable_get(drawable->id);
}
else
/* not a layer... probably a channel... abort operation */
exit;
gimp_tile_cache_ntiles ( ((longside/gimp_tile_width())+1) +
((longside/gimp_tile_height())+1) );
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, longside, longside,
FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, longside, longside,
TRUE, TRUE);
buffer = g_malloc (longside * bytes);
if (rotvals.angle == 1) /* we're rotating by 90<39> */
{
for (row = 0; row < height; row++)
{
gimp_pixel_rgn_get_row (&srcPR, buffer, 0, row, width);
gimp_pixel_rgn_set_col (&destPR, buffer, (height - row - 1), 0,
width);
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) height);
}
}
else /* we're rotating by 270<37> */
{
for (col = 0; col < width; col++)
{
gimp_pixel_rgn_get_col (&srcPR, buffer, col, 0, height);
gimp_pixel_rgn_set_row (&destPR, buffer, 0, (width - col - 1),
height);
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) height);
}
}
g_free (buffer);
gimp_progress_update ( 1.0 );
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, 0, 0, height, width);
gimp_layer_resize(drawable->id, height, width, 0, 0);
drawable = gimp_drawable_get(drawable->id);
gimp_drawable_flush (drawable);
gimp_drawable_update (drawable->id, 0, 0, height, width);
}
gimp_drawable_offsets (drawable->id, &offsetx, &offsety);
rotate_compute_offsets (&offsetx, &offsety,
gimp_image_width(image_ID),
gimp_image_height(image_ID),
width, height);
gimp_layer_set_offsets (drawable->id, offsetx, offsety);
if (was_preserve_transparency)
gimp_layer_set_preserve_transparency ( drawable->id, TRUE );
return;
}
/* The main rotate function */
static void
rotate (void)
{
gint nreturn_vals;
GDrawable *drawable;
gint32 *layers;
gint i, nlayers;
if (rotvals.angle == 0) return;
/* if there's a selection and we try to rotate the whole image */
/* create an error message and exit */
if ( rotvals.everything )
{
if ( !my_gimp_selection_is_empty (image_ID) )
{
gimp_message("You can not rotate the whole image if there's a selection.");
gimp_drawable_detach (active_drawable);
return;
}
if ( gimp_layer_is_floating_selection (active_drawable->id) )
{
gimp_message("You can not rotate the whole image if there's a floating selection.");
gimp_drawable_detach (active_drawable);
return;
}
}
gimp_progress_init ("Rotating...");
gimp_run_procedure ("gimp_undo_push_group_start", &nreturn_vals,
PARAM_IMAGE, image_ID, PARAM_END);
if (rotvals.everything) /* rotate the whole image */
{
gimp_drawable_detach (active_drawable);
layers = gimp_image_get_layers (image_ID, &nlayers);
for ( i=0; i<nlayers; i++ )
{
drawable = gimp_drawable_get (layers[i]);
rotate_drawable (drawable);
gimp_drawable_detach (drawable);
}
g_free(layers);
if (rotvals.angle != 2)
{
gimp_image_resize (image_ID,
gimp_image_height(image_ID),
gimp_image_width(image_ID),
0, 0);
}
}
else /* rotate only the active layer */
{
/* check for active selection and float it */
if ( !my_gimp_selection_is_empty (image_ID) &&
!gimp_layer_is_floating_selection (active_drawable->id) )
active_drawable =
gimp_drawable_get (my_gimp_selection_float (image_ID,
active_drawable->id) );
rotate_drawable (active_drawable);
gimp_drawable_detach (active_drawable);
}
gimp_run_procedure ("gimp_undo_push_group_end", &nreturn_vals,
PARAM_IMAGE, image_ID, PARAM_END);
return;
}
/* Rotate dialog */
static gint
rotate_dialog (void)
{
GtkWidget *dialog;
GtkWidget *button;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *radio_label;
GtkWidget *unit_label;
GtkWidget *hbox;
GtkWidget *radio_button;
GtkWidget *check_button;
GSList *radio_group = NULL;
gint radio_pressed[NUM_ANGLES];
gint everything;
gint argc = 1;
gint i;
gchar **argv = g_new (gchar *, 1);
argv[0] = g_strdup ("Rotate");
for (i=0;i<NUM_ANGLES;i++)
{
radio_pressed[i] = (rotvals.angle == i);
}
everything = rotvals.everything;
/* Init GTK */
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
gdk_set_use_xshm (gimp_use_xshm ());
/* Main Dialog */
dialog = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dialog), PLUG_IN_PRINT_NAME);
gtk_window_position (GTK_WINDOW (dialog), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dialog), "destroy",
(GtkSignalFunc) rotate_close_callback,
NULL);
/* Action area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) rotate_ok_callback,
dialog);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->action_area),
button, TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (dialog));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->action_area),
button, TRUE, TRUE, 0);
gtk_widget_show (button);
/* parameter settings */
frame = gtk_frame_new ("Rotate clockwise by");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox),
frame, TRUE, TRUE, 0);
/* table for radio_buttons */
table = gtk_table_new (6, 6, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 8);
gtk_table_set_col_spacings (GTK_TABLE (table), 1);
gtk_container_border_width (GTK_CONTAINER (table), 6);
gtk_container_add (GTK_CONTAINER (frame), table);
/* radio buttons */
/* 0 degrees */
radio_label = gtk_label_new ( angle_label[0] );
gtk_table_attach ( GTK_TABLE (table), radio_label, 2, 3, 0, 1, 0, 0, 0, 0);
gtk_widget_show (radio_label);
radio_button = gtk_radio_button_new ( radio_group );
radio_group = gtk_radio_button_group ( GTK_RADIO_BUTTON (radio_button) );
gtk_table_attach ( GTK_TABLE (table), radio_button, 2, 3, 1, 2, 0, 0, 0, 0);
gtk_signal_connect ( GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) rotate_toggle_update,
&radio_pressed[0]);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (radio_button),
radio_pressed[0]);
gtk_widget_show (radio_button);
/* 90 degrees */
radio_label = gtk_label_new ( angle_label[1] );
gtk_table_attach ( GTK_TABLE (table), radio_label, 4, 5, 2, 3, 0, 0, 0, 0);
gtk_widget_show (radio_label);
radio_button = gtk_radio_button_new ( radio_group );
radio_group = gtk_radio_button_group ( GTK_RADIO_BUTTON (radio_button) );
gtk_table_attach ( GTK_TABLE (table), radio_button, 3, 4, 2, 3, 0, 0, 0, 0);
gtk_signal_connect ( GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) rotate_toggle_update,
&radio_pressed[1]);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (radio_button),
radio_pressed[1]);
gtk_widget_show (radio_button);
/* 180 degrees */
radio_label = gtk_label_new ( angle_label[2] );
gtk_table_attach ( GTK_TABLE (table), radio_label, 2, 3, 4, 5, 0, 0, 0, 0);
gtk_widget_show (radio_label);
radio_button = gtk_radio_button_new ( radio_group );
radio_group = gtk_radio_button_group ( GTK_RADIO_BUTTON (radio_button) );
gtk_table_attach ( GTK_TABLE (table), radio_button, 2, 3, 3, 4, 0, 0, 0, 0);
gtk_signal_connect ( GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) rotate_toggle_update,
&radio_pressed[2]);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (radio_button),
radio_pressed[2]);
gtk_widget_show (radio_button);
/* 270 degrees */
radio_label = gtk_label_new ( angle_label[3] );
gtk_table_attach ( GTK_TABLE (table), radio_label, 0, 1, 2, 3, 0, 0, 0, 0);
gtk_widget_show (radio_label);
radio_button = gtk_radio_button_new ( radio_group );
radio_group = gtk_radio_button_group ( GTK_RADIO_BUTTON (radio_button) );
gtk_table_attach ( GTK_TABLE (table), radio_button, 1, 2, 2, 3, 0, 0, 0, 0);
gtk_signal_connect ( GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) rotate_toggle_update,
&radio_pressed[3]);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (radio_button),
radio_pressed[3]);
gtk_widget_show (radio_button);
/* label: degrees */
unit_label = gtk_label_new ( "degrees" );
gtk_table_attach ( GTK_TABLE (table), unit_label, 5, 6, 5, 6, 0, 0, 0, 0);
gtk_widget_show (unit_label);
gtk_widget_show (table);
gtk_widget_show (frame);
/* hbox for check-button */
hbox = gtk_hbox_new (FALSE, 1);
gtk_container_border_width (GTK_CONTAINER (hbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox),
hbox, TRUE, TRUE, 0);
/* check button */
check_button = gtk_check_button_new_with_label ("Rotate the whole image");
gtk_box_pack_end (GTK_BOX (hbox), check_button, TRUE, TRUE, 0);
gtk_signal_connect (GTK_OBJECT (check_button), "toggled",
(GtkSignalFunc) rotate_toggle_update,
&everything);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (check_button),
rotvals.everything);
gtk_widget_show (check_button);
gtk_widget_show (hbox);
gtk_widget_show (dialog);
gtk_main ();
gdk_flush ();
rotvals.angle=0;
for (i = 0; i < NUM_ANGLES; i++)
{
if (radio_pressed[i]==TRUE)
{
rotvals.angle = i;
break;
}
}
rotvals.everything = everything;
return rotint.run;
}
/* Rotate interface functions */
static void
rotate_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
rotate_ok_callback (GtkWidget *widget,
gpointer data)
{
rotint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
rotate_toggle_update (GtkWidget *widget,
gpointer data)
{
gint *toggle_val;
toggle_val = (gint *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
*toggle_val = TRUE;
else
*toggle_val = FALSE;
}