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gimp/plug-ins/common/deinterlace.c

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/* Deinterlace 1.00 - image processing plug-in for GIMP
*
* Copyright (C) 1997 Andrew Kieschnick (andrewk@mail.utexas.edu)
*
* Original deinterlace for GIMP 0.54 API by Federico Mena Quintero
*
* Copyright (C) 1996 Federico Mena Quintero
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-deinterlace"
#define PLUG_IN_BINARY "deinterlace"
enum
{
ODD_FIELDS,
EVEN_FIELDS
};
typedef struct
{
gint evenness;
} DeinterlaceValues;
/* Declare local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void deinterlace (GimpDrawable *drawable,
GimpPreview *preview);
static gboolean deinterlace_dialog (GimpDrawable *drawable);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static DeinterlaceValues devals =
{
EVEN_FIELDS /* evenness */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "evenodd", "Which lines to keep { KEEP-ODD (0), KEEP-EVEN (1) }" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Fix images where every other row is missing"),
"Deinterlace is useful for processing images from "
"video capture cards. When only the odd or even "
"fields get captured, deinterlace can be used to "
"interpolate between the existing fields to correct "
"this.",
"Andrew Kieschnick",
"Andrew Kieschnick",
"1997",
N_("_Deinterlace..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Enhance");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
INIT_I18N ();
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC, &devals);
if (! deinterlace_dialog (drawable))
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 4)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
devals.evenness = param[3].data.d_int32;
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC, &devals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* Make sure that the drawable is gray or RGB color */
if (gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id))
{
gimp_progress_init (_("Deinterlace"));
gimp_tile_cache_ntiles (2 * (drawable->width /
gimp_tile_width () + 1));
deinterlace (drawable, NULL);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &devals, sizeof (DeinterlaceValues));
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static void
deinterlace (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
gboolean has_alpha;
guchar *dest;
guchar *dest_buffer = NULL;
guchar *upper;
guchar *lower;
gint row, col;
gint x, y;
gint width, height;
gint bytes;
bytes = drawable->bpp;
if (preview)
{
gimp_preview_get_position (preview, &x, &y);
gimp_preview_get_size (preview, &width, &height);
dest_buffer = g_new (guchar, width * height * bytes);
dest = dest_buffer;
}
else
{
if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&x, &y, &width, &height))
return;
dest = g_new (guchar, width * bytes);
gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, TRUE, TRUE);
}
gimp_pixel_rgn_init (&srcPR, drawable,
x, MAX (y - 1, 0),
width, MIN (height + 1, drawable->height),
FALSE, FALSE);
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
/* allocate row buffers */
upper = g_new (guchar, width * bytes);
lower = g_new (guchar, width * bytes);
/* loop through the rows, performing our magic */
for (row = y; row < y + height; row++)
{
gimp_pixel_rgn_get_row (&srcPR, dest, x, row, width);
if (row % 2 != devals.evenness)
{
if (row > 0)
gimp_pixel_rgn_get_row (&srcPR, upper, x, row - 1, width);
else
gimp_pixel_rgn_get_row (&srcPR, upper, x, devals.evenness, width);
if (row + 1 < drawable->height)
gimp_pixel_rgn_get_row (&srcPR, lower, x, row + 1, width);
else
gimp_pixel_rgn_get_row (&srcPR, lower, x, row - 1 + devals.evenness,
width);
if (has_alpha)
{
const guchar *upix = upper;
const guchar *lpix = lower;
guchar *dpix = dest;
for (col = 0; col < width; col++)
{
guint ualpha = upix[bytes - 1];
guint lalpha = lpix[bytes - 1];
guint alpha = ualpha + lalpha;
if ((dpix[bytes - 1] = (alpha >> 1)))
{
gint b;
for (b = 0; b < bytes - 1; b++)
dpix[b] = (upix[b] * ualpha + lpix[b] * lalpha) / alpha;
}
upix += bytes;
lpix += bytes;
dpix += bytes;
}
}
else
{
for (col = 0; col < width * bytes; col++)
dest[col] = ((guint) upper[col] + (guint) lower[col]) / 2;
}
}
if (preview)
{
dest += width * bytes;
}
else
{
gimp_pixel_rgn_set_row (&destPR, dest, x, row, width);
if ((row % 20) == 0)
gimp_progress_update ((double) row / (double) (height));
}
}
if (preview)
{
gimp_preview_draw_buffer (preview, dest_buffer, width * bytes);
dest = dest_buffer;
}
else
{
/* update the deinterlaced region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x, y, width, height);
}
g_free (lower);
g_free (upper);
g_free (dest);
}
static gboolean
deinterlace_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *frame;
GtkWidget *odd;
GtkWidget *even;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Deinterlace"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_drawable_preview_new (drawable, NULL);
gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (deinterlace),
drawable);
frame = gimp_int_radio_group_new (FALSE, NULL,
G_CALLBACK (gimp_radio_button_update),
&devals.evenness, devals.evenness,
_("Keep o_dd fields"), ODD_FIELDS, &odd,
_("Keep _even fields"), EVEN_FIELDS, &even,
NULL);
g_signal_connect_swapped (odd, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect_swapped (even, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
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