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gimp/plug-ins/common/screenshot.c

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/*
* ScreenShot plug-in
* Copyright 1998-2000 Sven Neumann <sven@gimp.org>
* Copyright 2003 Henrik Brix Andersen <brix@gimp.org>
*
* Any suggestions, bug-reports or patches are very welcome.
*
*/
/* 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 "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#if defined(GDK_WINDOWING_X11)
#include <gdk/gdkx.h>
#elif defined(GDK_WINDOWING_WIN32)
#include <windows.h>
#endif
#include "libgimp/stdplugins-intl.h"
/* Defines */
#define PLUG_IN_NAME "plug_in_screenshot"
#define HELP_ID "plug-in-screenshot"
#ifdef __GNUC__
#ifdef GDK_NATIVE_WINDOW_POINTER
#if GLIB_SIZEOF_VOID_P != 4
#warning window_id does not fit in PDB_INT32
#endif
#endif
#endif
typedef struct
{
gboolean root;
guint window_id;
guint select_delay;
guint grab_delay;
} ScreenShotValues;
static ScreenShotValues shootvals =
{
FALSE, /* root window */
0, /* window ID */
0, /* select delay */
0, /* grab delay */
};
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static GdkNativeWindow select_window (GdkScreen *screen);
static gint32 create_image (const GdkPixbuf *pixbuf);
static void shoot (void);
static gboolean shoot_dialog (void);
static void shoot_delay (gint32 delay);
static gboolean shoot_delay_callback (gpointer data);
/* Global Variables */
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
/* the image that will be returned */
static gint32 image_ID = -1;
/* the screen on which we are running */
static GdkScreen *cur_screen = NULL;
/* the window the user selected */
static GdkNativeWindow selected_native;
/* Functions */
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_INT32, "root", "Root window { TRUE, FALSE }" },
{ GIMP_PDB_INT32, "window_id", "Window id" }
};
static GimpParamDef return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
gimp_install_procedure (PLUG_IN_NAME,
"Creates a screenshot of a single window or the whole screen",
"After a user specified time out the user selects a window and "
"another time out is started. At the end of the second time out "
"the window is grabbed and the image is loaded into The GIMP. "
"Alternatively the whole screen can be grabbed. When called "
"non-interactively it may grab the root window or use the "
"window-id passed as a parameter.",
"Sven Neumann <sven@gimp.org>, Henrik Brix Andersen <brix@gimp.org>",
"1998 - 2003",
"v0.9.7 (2003/11/15)",
N_("<Toolbox>/File/Acquire/_Screen Shot..."),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args, return_vals);
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
/* Get the runmode from the in-parameters */
GimpRunMode run_mode = param[0].data.d_int32;
/* status variable, use it to check for errors in invocation usually only
* during non-interactive calling
*/
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
/* always return at least the status to the caller. */
static GimpParam values[2];
/* initialize the return of the status */
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
INIT_I18N ();
/* how are we running today? */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data from a previous run */
gimp_get_data (PLUG_IN_NAME, &shootvals);
shootvals.window_id = 0;
/* Get information from the dialog */
if (!shoot_dialog ())
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams == 3)
{
shootvals.root = param[1].data.d_int32;
shootvals.window_id = param[2].data.d_int32;
shootvals.select_delay = 0;
shootvals.grab_delay = 0;
}
else
status = GIMP_PDB_CALLING_ERROR;
if (!gdk_init_check (0, NULL))
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data from a previous run */
gimp_get_data (PLUG_IN_NAME, &shootvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (shootvals.grab_delay > 0)
shoot_delay (shootvals.grab_delay);
/* Run the main function */
shoot ();
status = (image_ID != -1) ? GIMP_PDB_SUCCESS : GIMP_PDB_EXECUTION_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
if (run_mode == GIMP_RUN_INTERACTIVE)
{
/* Store variable states for next run */
gimp_set_data (PLUG_IN_NAME, &shootvals, sizeof (ScreenShotValues));
/* display the image */
gimp_display_new (image_ID);
}
/* set return values */
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
values[0].data.d_status = status;
}
/* Allow the user to select a window with the mouse */
static GdkNativeWindow
select_window (GdkScreen *screen)
{
#if defined(GDK_WINDOWING_X11)
/* X11 specific code */
#define MASK (ButtonPressMask | ButtonReleaseMask)
Display *x_dpy;
Cursor x_cursor;
XEvent x_event;
Window x_win;
Window x_root;
gint x_scr;
gint status;
gint buttons;
x_dpy = GDK_SCREEN_XDISPLAY (screen);
x_scr = GDK_SCREEN_XNUMBER (screen);
x_win = None;
x_root = RootWindow (x_dpy, x_scr);
x_cursor = XCreateFontCursor (x_dpy, GDK_CROSSHAIR);
buttons = 0;
status = XGrabPointer (x_dpy, x_root, False,
MASK, GrabModeSync, GrabModeAsync,
x_root, x_cursor, CurrentTime);
if (status != GrabSuccess)
{
g_message (_("Error grabbing the pointer"));
return 0;
}
while ((x_win == None) || (buttons != 0))
{
XAllowEvents (x_dpy, SyncPointer, CurrentTime);
XWindowEvent (x_dpy, x_root, MASK, &x_event);
switch (x_event.type)
{
case ButtonPress:
if (x_win == None)
{
x_win = x_event.xbutton.subwindow;
if (x_win == None)
x_win = x_root;
}
buttons++;
break;
case ButtonRelease:
if (buttons > 0)
buttons--;
break;
default:
g_assert_not_reached ();
}
}
XUngrabPointer (x_dpy, CurrentTime);
XFreeCursor (x_dpy, x_cursor);
return x_win;
#elif defined(GDK_WINDOWING_WIN32)
/* MS Windows specific code goes here (yet to be written) */
/* basically the code should grab the pointer using a crosshair
cursor, allow the user to click on a window and return the
obtained HWND (as a GdkNativeWindow) - for more details consult
the X11 specific code above */
/* note to self: take a look at the winsnap plug-in for example
code */
#warning Win32 screenshot window chooser not implemented yet
return 0;
#else /* GDK_WINDOWING_WIN32 */
#warning screenshot window chooser not implemented yet for this GDK backend
return 0;
#endif
}
/* Create a GimpImage from a GdkPixbuf */
static gint32
create_image (const GdkPixbuf *pixbuf)
{
GimpPixelRgn rgn;
GimpDrawable *drawable;
gint32 image;
gint32 layer;
gdouble xres, yres;
gchar *comment;
gint width, height;
gint rowstride;
gint bpp;
gboolean status;
gchar *pixels;
gpointer pr;
status = gimp_progress_init (_("Loading Screen Shot..."));
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
image = gimp_image_new (width, height, GIMP_RGB);
layer = gimp_layer_new (image, _("Screen Shot"),
width, height,
GIMP_RGB_IMAGE, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image, layer, 0);
drawable = gimp_drawable_get (layer);
gimp_pixel_rgn_init (&rgn, drawable, 0, 0, width, height, TRUE, FALSE);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
bpp = gdk_pixbuf_get_n_channels (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
g_assert (bpp == rgn.bpp);
for (pr = gimp_pixel_rgns_register (1, &rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src;
guchar *dest;
gint y;
src = pixels + rgn.y * rowstride + rgn.x * bpp;
dest = rgn.data;
for (y = 0; y < rgn.h; y++)
{
memcpy (dest, src, rgn.w * rgn.bpp);
src += rowstride;
dest += rgn.rowstride;
}
}
gimp_drawable_detach (drawable);
gimp_progress_update (1.0);
gimp_get_monitor_resolution (&xres, &yres);
gimp_image_set_resolution (image, xres, yres);
comment = gimp_get_default_comment ();
if (comment)
{
GimpParasite *parasite;
parasite = gimp_parasite_new ("gimp-comment",
GIMP_PARASITE_PERSISTENT,
g_utf8_strlen (comment, -1) + 1,
comment);
gimp_image_parasite_attach (image_ID, parasite);
gimp_parasite_free (parasite);
g_free (comment);
}
gimp_image_undo_enable (image);
return image;
}
/* The main ScreenShot function */
static void
shoot (void)
{
GdkWindow *window;
GdkPixbuf *screenshot;
GdkRectangle rect;
GdkRectangle screen_rect;
gint x, y;
/* use default screen if we are running non-interactively */
if (cur_screen == NULL)
cur_screen = gdk_screen_get_default ();
screen_rect.x = 0;
screen_rect.y = 0;
screen_rect.width = gdk_screen_get_width (cur_screen);
screen_rect.height = gdk_screen_get_height (cur_screen);
if (shootvals.root)
{
/* entire screen */
window = gdk_screen_get_root_window (cur_screen);
}
else
{
GdkDisplay *display;
display = gdk_screen_get_display (cur_screen);
/* single window */
if (shootvals.window_id)
{
window = gdk_window_foreign_new_for_display (display,
shootvals.window_id);
}
else
{
window = gdk_window_foreign_new_for_display (display,
selected_native);
}
}
if (!window)
{
g_message (_("Specified window not found"));
return;
}
gdk_window_get_origin (window, &x, &y);
rect.x = x;
rect.y = y;
gdk_drawable_get_size (GDK_DRAWABLE (window), &rect.width, &rect.height);
if (! gdk_rectangle_intersect (&rect, &screen_rect, &rect))
return;
screenshot = gdk_pixbuf_get_from_drawable (NULL, window,
NULL,
rect.x - x, rect.y - y, 0, 0,
rect.width, rect.height);
gdk_display_beep (gdk_screen_get_display (cur_screen));
gdk_flush ();
if (!screenshot)
{
g_message (_("Error obtaining Screen Shot"));
return;
}
image_ID = create_image (screenshot);
g_object_unref (screenshot);
}
/* ScreenShot dialog */
static gboolean
shoot_dialog (void)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *button;
GtkWidget *spinner;
GSList *radio_group = NULL;
GtkObject *adj;
gboolean run;
gimp_ui_init ("screenshot", FALSE);
dialog = gimp_dialog_new (_("Screen Shot"), "screenshot",
NULL, 0,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
main_vbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), main_vbox,
TRUE, TRUE, 0);
gtk_widget_show (main_vbox);
/* single window */
frame = gtk_frame_new (_("Grab"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (frame), vbox);
button = gtk_radio_button_new_with_mnemonic (radio_group,
_("a _Single Window"));
radio_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), ! shootvals.root);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_object_set_data (G_OBJECT (button), "gimp-item-data",
GINT_TO_POINTER (FALSE));
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_radio_button_update),
&shootvals.root);
/* select window delay */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new_with_mnemonic (_("S_elect Window After"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
adj = gtk_adjustment_new (shootvals.select_delay, 0.0, 100.0, 1.0, 5.0, 0.0);
spinner = gtk_spin_button_new (GTK_ADJUSTMENT (adj), 0, 0);
gtk_box_pack_start (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);
gtk_widget_show (spinner);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&shootvals.select_delay);
label = gtk_label_new (_("Seconds Delay"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_show (hbox);
/* root window */
button = gtk_radio_button_new_with_mnemonic (radio_group,
_("the _Whole Screen"));
radio_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), shootvals.root);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_object_set_data (G_OBJECT (button), "gimp-item-data",
GINT_TO_POINTER (TRUE));
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_radio_button_update),
&shootvals.root);
gtk_widget_show (button);
gtk_widget_show (vbox);
gtk_widget_show (frame);
/* grab delay */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new_with_mnemonic (_("Grab _After"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
adj = gtk_adjustment_new (shootvals.grab_delay, 0.0, 100.0, 1.0, 5.0, 0.0);
spinner = gtk_spin_button_new (GTK_ADJUSTMENT (adj), 0, 0);
gtk_box_pack_start (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);
gtk_widget_show (spinner);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&shootvals.grab_delay);
label = gtk_label_new (_("Seconds Delay"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_show (hbox);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
if (run)
{
/* get the screen on which we are running */
cur_screen = gtk_widget_get_screen (dialog);
}
gtk_widget_destroy (dialog);
if (run)
{
if (!shootvals.root && !shootvals.window_id)
{
if (shootvals.select_delay > 0)
shoot_delay (shootvals.select_delay);
selected_native = select_window (cur_screen);
}
}
return run;
}
/* delay functions */
void
shoot_delay (gint delay)
{
g_timeout_add (1000, shoot_delay_callback, &delay);
gtk_main ();
}
gboolean
shoot_delay_callback (gpointer data)
{
gint *seconds_left = data;
(*seconds_left)--;
if (!*seconds_left)
gtk_main_quit ();
return *seconds_left;
}
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