/*
* Sharpen filters for GIMP - The GNU Image Manipulation Program
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com)
*
* 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 .
*
*/
#include "config.h"
#include
#include
#include
#include "libgimp/stdplugins-intl.h"
/*
* Constants...
*/
#define PLUG_IN_PROC "plug-in-sharpen"
#define PLUG_IN_BINARY "sharpen"
#define PLUG_IN_ROLE "gimp-sharpen"
#define PLUG_IN_VERSION "1.4.2 - 3 June 1998"
#define SCALE_WIDTH 100
/*
* Local functions...
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **returm_vals);
static void compute_luts (void);
static void sharpen (GimpDrawable *drawable);
static gboolean sharpen_dialog (GimpDrawable *drawable);
static void preview_update (GimpPreview *preview);
typedef gint32 intneg;
typedef gint32 intpos;
static void gray_filter (int width, guchar *src, guchar *dst, intneg *neg0,
intneg *neg1, intneg *neg2);
static void graya_filter (int width, guchar *src, guchar *dst, intneg *neg0,
intneg *neg1, intneg *neg2);
static void rgb_filter (int width, guchar *src, guchar *dst, intneg *neg0,
intneg *neg1, intneg *neg2);
static void rgba_filter (int width, guchar *src, guchar *dst, intneg *neg0,
intneg *neg1, intneg *neg2);
/*
* Globals...
*/
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
typedef struct
{
gint sharpen_percent;
} SharpenParams;
static SharpenParams sharpen_params =
{
10
};
static intneg neg_lut[256]; /* Negative coefficient LUT */
static intpos pos_lut[256]; /* Positive coefficient LUT */
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" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "percent", "Percent sharpening (default = 10)" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Make image sharper "
"(less powerful than Unsharp Mask)"),
"This plug-in selectively performs a convolution "
"filter on an image.",
"Michael Sweet ",
"Copyright 1997-1998 by Michael Sweet",
PLUG_IN_VERSION,
N_("_Sharpen..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "/Filters/Enhance");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1]; /* Return values */
GimpRunMode run_mode; /* Current run mode */
GimpPDBStatusType status; /* Return status */
GimpDrawable *drawable; /* Current image */
/*
* Initialize parameter data...
*/
status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/*
* Get drawable information...
*/
drawable = gimp_drawable_get (param[2].data.d_drawable);
gimp_tile_cache_ntiles (2 * drawable->ntile_cols);
/*
* See how we will run
*/
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/*
* Possibly retrieve data...
*/
gimp_get_data (PLUG_IN_PROC, &sharpen_params);
/*
* Get information from the dialog...
*/
if (!sharpen_dialog (drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
/*
* Make sure all the arguments are present...
*/
if (nparams != 4)
status = GIMP_PDB_CALLING_ERROR;
else
sharpen_params.sharpen_percent = param[3].data.d_int32;
break;
case GIMP_RUN_WITH_LAST_VALS:
/*
* Possibly retrieve data...
*/
gimp_get_data (PLUG_IN_PROC, &sharpen_params);
break;
default:
status = GIMP_PDB_CALLING_ERROR;
break;
}
/*
* Sharpen the image...
*/
if (status == GIMP_PDB_SUCCESS)
{
if ((gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id)))
{
/*
* Run!
*/
sharpen (drawable);
/*
* If run mode is interactive, flush displays...
*/
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/*
* Store data...
*/
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC,
&sharpen_params, sizeof (SharpenParams));
}
else
status = GIMP_PDB_EXECUTION_ERROR;
}
/*
* Reset the current run status...
*/
values[0].data.d_status = status;
/*
* Detach from the drawable...
*/
gimp_drawable_detach (drawable);
}
static void
compute_luts (void)
{
gint i; /* Looping var */
gint fact; /* 1 - sharpness */
fact = 100 - sharpen_params.sharpen_percent;
if (fact < 1)
fact = 1;
for (i = 0; i < 256; i ++)
{
pos_lut[i] = 800 * i / fact;
neg_lut[i] = (4 + pos_lut[i] - (i << 3)) >> 3;
}
}
/*
* 'sharpen()' - Sharpen an image using a convolution filter.
*/
static void
sharpen (GimpDrawable *drawable)
{
GimpPixelRgn src_rgn; /* Source image region */
GimpPixelRgn dst_rgn; /* Destination image region */
guchar *src_rows[4]; /* Source pixel rows */
guchar *src_ptr; /* Current source pixel */
guchar *dst_row; /* Destination pixel row */
intneg *neg_rows[4]; /* Negative coefficient rows */
intneg *neg_ptr; /* Current negative coefficient */
gint i; /* Looping vars */
gint y; /* Current location in image */
gint row; /* Current row in src_rows */
gint count; /* Current number of filled src_rows */
gint width; /* Byte width of the image */
gint x1; /* Selection bounds */
gint y1;
gint y2;
gint sel_width; /* Selection width */
gint sel_height; /* Selection height */
gint img_bpp; /* Bytes-per-pixel in image */
void (*filter)(int, guchar *, guchar *, intneg *, intneg *, intneg *);
filter = NULL;
if (! gimp_drawable_mask_intersect (drawable->drawable_id,
&x1, &y1, &sel_width, &sel_height))
return;
y2 = y1 + sel_height;
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
/*
* Let the user know what we're doing...
*/
gimp_progress_init (_("Sharpening"));
/*
* Setup for filter...
*/
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, sel_width, sel_height, FALSE, FALSE);
gimp_pixel_rgn_init (&dst_rgn, drawable,
x1, y1, sel_width, sel_height, TRUE, TRUE);
compute_luts ();
width = sel_width * img_bpp;
for (row = 0; row < 4; row ++)
{
src_rows[row] = g_new (guchar, width);
neg_rows[row] = g_new (intneg, width);
}
dst_row = g_new (guchar, width);
/*
* Pre-load the first row for the filter...
*/
gimp_pixel_rgn_get_row (&src_rgn, src_rows[0], x1, y1, sel_width);
for (i = width, src_ptr = src_rows[0], neg_ptr = neg_rows[0];
i > 0;
i --, src_ptr ++, neg_ptr ++)
*neg_ptr = neg_lut[*src_ptr];
row = 1;
count = 1;
/*
* Select the filter...
*/
switch (img_bpp)
{
case 1 :
filter = gray_filter;
break;
case 2 :
filter = graya_filter;
break;
case 3 :
filter = rgb_filter;
break;
case 4 :
filter = rgba_filter;
break;
};
/*
* Sharpen...
*/
for (y = y1; y < y2; y ++)
{
/*
* Load the next pixel row...
*/
if ((y + 1) < y2)
{
/*
* Check to see if our src_rows[] array is overflowing yet...
*/
if (count >= 3)
count --;
/*
* Grab the next row...
*/
gimp_pixel_rgn_get_row (&src_rgn, src_rows[row],
x1, y + 1, sel_width);
for (i = width, src_ptr = src_rows[row], neg_ptr = neg_rows[row];
i > 0;
i --, src_ptr ++, neg_ptr ++)
*neg_ptr = neg_lut[*src_ptr];
count ++;
row = (row + 1) & 3;
}
else
{
/*
* No more pixels at the bottom... Drop the oldest samples...
*/
count --;
}
/*
* Now sharpen pixels and save the results...
*/
if (count == 3)
{
(* filter) (sel_width, src_rows[(row + 2) & 3], dst_row,
neg_rows[(row + 1) & 3] + img_bpp,
neg_rows[(row + 2) & 3] + img_bpp,
neg_rows[(row + 3) & 3] + img_bpp);
/*
* Set the row...
*/
gimp_pixel_rgn_set_row (&dst_rgn, dst_row, x1, y, sel_width);
}
else if (count == 2)
{
if (y == y1) /* first row */
gimp_pixel_rgn_set_row (&dst_rgn, src_rows[0],
x1, y, sel_width);
else /* last row */
gimp_pixel_rgn_set_row (&dst_rgn, src_rows[(sel_height - 1) & 3],
x1, y, sel_width);
}
if ((y & 15) == 0)
gimp_progress_update ((gdouble) (y - y1) / (gdouble) sel_height);
}
/*
* OK, we're done. Free all memory used...
*/
for (row = 0; row < 4; row ++)
{
g_free (src_rows[row]);
g_free (neg_rows[row]);
}
g_free (dst_row);
/*
* Update the screen...
*/
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, sel_width, sel_height);
}
/*
* 'sharpen_dialog()' - Popup a dialog window for the filter box size...
*/
static gboolean
sharpen_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *table;
GtkObject *adj;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Sharpen"), PLUG_IN_ROLE,
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_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
main_vbox, TRUE, TRUE, 0);
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 (preview, "invalidated",
G_CALLBACK (preview_update),
NULL);
table = gtk_table_new (1, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("_Sharpness:"), SCALE_WIDTH, 0,
sharpen_params.sharpen_percent,
1, 99, 1, 10, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&sharpen_params.sharpen_percent);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
preview_update (GimpPreview *preview)
{
GimpDrawable *drawable;
GimpPixelRgn src_rgn; /* Source image region */
guchar *src_ptr; /* Current source pixel */
guchar *dst_ptr; /* Current destination pixel */
intneg *neg_ptr; /* Current negative pixel */
gint i; /* Looping var */
gint y; /* Current location in image */
gint width; /* Byte width of the image */
gint x1, y1;
gint preview_width, preview_height;
guchar *preview_src, *preview_dst;
intneg *preview_neg;
gint img_bpp; /* Bytes-per-pixel in image */
void (*filter)(int, guchar *, guchar *, intneg *, intneg *, intneg *);
filter = NULL;
compute_luts();
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &preview_width, &preview_height);
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
preview_src = g_new (guchar, preview_width * preview_height * img_bpp);
preview_neg = g_new (intneg, preview_width * preview_height * img_bpp);
preview_dst = g_new (guchar, preview_width * preview_height * img_bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, preview_width, preview_height,
FALSE, FALSE);
width = preview_width * img_bpp;
/*
* Load the preview area...
*/
gimp_pixel_rgn_get_rect (&src_rgn, preview_src, x1, y1,
preview_width, preview_height);
for (i = width * preview_height, src_ptr = preview_src, neg_ptr = preview_neg;
i > 0;
i --)
*neg_ptr++ = neg_lut[*src_ptr++];
/*
* Select the filter...
*/
switch (img_bpp)
{
case 1:
filter = gray_filter;
break;
case 2:
filter = graya_filter;
break;
case 3:
filter = rgb_filter;
break;
case 4:
filter = rgba_filter;
break;
default:
g_error ("Programmer stupidity error: img_bpp is %d\n",
img_bpp);
}
/*
* Sharpen...
*/
memcpy (preview_dst, preview_src, width);
memcpy (preview_dst + width * (preview_height - 1),
preview_src + width * (preview_height - 1),
width);
for (y = preview_height - 2, src_ptr = preview_src + width,
neg_ptr = preview_neg + width + img_bpp,
dst_ptr = preview_dst + width;
y > 0;
y --, src_ptr += width, neg_ptr += width, dst_ptr += width)
(*filter)(preview_width, src_ptr, dst_ptr, neg_ptr - width,
neg_ptr, neg_ptr + width);
gimp_preview_draw_buffer (preview, preview_dst, preview_width * img_bpp);
g_free (preview_src);
g_free (preview_neg);
g_free (preview_dst);
}
/*
* 'gray_filter()' - Sharpen grayscale pixels.
*/
static void
gray_filter (gint width, /* I - Width of line in pixels */
guchar *src, /* I - Source line */
guchar *dst, /* O - Destination line */
intneg *neg0, /* I - Top negative coefficient line */
intneg *neg1, /* I - Middle negative coefficient line */
intneg *neg2) /* I - Bottom negative coefficient line */
{
intpos pixel; /* New pixel value */
*dst++ = *src++;
width -= 2;
while (width > 0)
{
pixel = (pos_lut[*src++] - neg0[-1] - neg0[0] - neg0[1] -
neg1[-1] - neg1[1] -
neg2[-1] - neg2[0] - neg2[1]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
neg0 ++;
neg1 ++;
neg2 ++;
width --;
}
*dst++ = *src++;
}
/*
* 'graya_filter()' - Sharpen grayscale+alpha pixels.
*/
static void
graya_filter (gint width, /* I - Width of line in pixels */
guchar *src, /* I - Source line */
guchar *dst, /* O - Destination line */
intneg *neg0, /* I - Top negative coefficient line */
intneg *neg1, /* I - Middle negative coefficient line */
intneg *neg2) /* I - Bottom negative coefficient line */
{
intpos pixel; /* New pixel value */
*dst++ = *src++;
*dst++ = *src++;
width -= 2;
while (width > 0)
{
pixel = (pos_lut[*src++] - neg0[-2] - neg0[0] - neg0[2] -
neg1[-2] - neg1[2] -
neg2[-2] - neg2[0] - neg2[2]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
*dst++ = *src++;
neg0 += 2;
neg1 += 2;
neg2 += 2;
width --;
}
*dst++ = *src++;
*dst++ = *src++;
}
/*
* 'rgb_filter()' - Sharpen RGB pixels.
*/
static void
rgb_filter (gint width, /* I - Width of line in pixels */
guchar *src, /* I - Source line */
guchar *dst, /* O - Destination line */
intneg *neg0, /* I - Top negative coefficient line */
intneg *neg1, /* I - Middle negative coefficient line */
intneg *neg2) /* I - Bottom negative coefficient line */
{
intpos pixel; /* New pixel value */
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
width -= 2;
while (width > 0)
{
pixel = (pos_lut[*src++] - neg0[-3] - neg0[0] - neg0[3] -
neg1[-3] - neg1[3] -
neg2[-3] - neg2[0] - neg2[3]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
pixel = (pos_lut[*src++] - neg0[-2] - neg0[1] - neg0[4] -
neg1[-2] - neg1[4] -
neg2[-2] - neg2[1] - neg2[4]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
pixel = (pos_lut[*src++] - neg0[-1] - neg0[2] - neg0[5] -
neg1[-1] - neg1[5] -
neg2[-1] - neg2[2] - neg2[5]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
neg0 += 3;
neg1 += 3;
neg2 += 3;
width --;
}
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
}
/*
* 'rgba_filter()' - Sharpen RGBA pixels.
*/
static void
rgba_filter (gint width, /* I - Width of line in pixels */
guchar *src, /* I - Source line */
guchar *dst, /* O - Destination line */
intneg *neg0, /* I - Top negative coefficient line */
intneg *neg1, /* I - Middle negative coefficient line */
intneg *neg2) /* I - Bottom negative coefficient line */
{
intpos pixel; /* New pixel value */
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
width -= 2;
while (width > 0)
{
pixel = (pos_lut[*src++] - neg0[-4] - neg0[0] - neg0[4] -
neg1[-4] - neg1[4] -
neg2[-4] - neg2[0] - neg2[4]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
pixel = (pos_lut[*src++] - neg0[-3] - neg0[1] - neg0[5] -
neg1[-3] - neg1[5] -
neg2[-3] - neg2[1] - neg2[5]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
pixel = (pos_lut[*src++] - neg0[-2] - neg0[2] - neg0[6] -
neg1[-2] - neg1[6] -
neg2[-2] - neg2[2] - neg2[6]);
pixel = (pixel + 4) >> 3;
*dst++ = CLAMP0255 (pixel);
*dst++ = *src++;
neg0 += 4;
neg1 += 4;
neg2 += 4;
width --;
}
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
}