mirror of https://github.com/GNOME/gimp.git
802 lines
21 KiB
C
802 lines
21 KiB
C
/*
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include <libgimp/gimp.h>
|
|
#include <libgimp/gimpui.h>
|
|
|
|
#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 <mike@easysw.com>",
|
|
"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, "<Image>/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_vbox_new (FALSE, 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;
|
|
}
|
|
|
|
/*
|
|
* 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++;
|
|
}
|