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gimp/plug-ins/color-rotate/color-rotate.c

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/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for GIMP.
*
* Colormap-Rotation plug-in. Exchanges two color ranges.
*
* Copyright (C) 1999 Sven Anders (anderss@fmi.uni-passau.de)
* Based on code from Pavel Grinfeld (pavel@ml.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/>.
*/
/*----------------------------------------------------------------------------
* Change log:
*
* Version 2.0, 04 April 1999.
* Nearly complete rewrite, made plug-in stable.
* (Works with GIMP 1.1 and GTK+ 1.2)
*
* Version 1.0, 27 March 1997.
* Initial (unstable) release by Pavel Grinfeld
*
*----------------------------------------------------------------------------*/
#include "config.h"
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "color-rotate.h"
#include "color-rotate-utils.h"
#include "color-rotate-dialog.h"
#include "color-rotate-callbacks.h"
#include "libgimp/stdplugins-intl.h"
/* Forward declarations */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void color_rotate (GimpDrawable *drawable);
/* Global variables */
RcmParams Current =
{
SELECTION, /* SELECTION ONLY */
TRUE, /* REAL TIME */
RADIANS_OVER_PI, /* START IN RADIANS OVER PI */
GRAY_TO
};
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN()
/* Query plug-in */
static void
query (void)
{
GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image (used for indexed images)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Replace a range of colors with another"),
"Exchanges two color ranges. "
"Based on code from Pavel Grinfeld (pavel@ml.com). "
"This version written by Sven Anders (anderss@fmi.uni-passau.de).",
"Sven Anders (anderss@fmi.uni-passau.de) and Pavel Grinfeld (pavel@ml.com)",
"Sven Anders (anderss@fmi.uni-passau.de)",
"04th April 1999",
N_("_Rotate Colors..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Colors/Map");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
*nreturn_vals = 1;
*return_vals = values;
INIT_I18N ();
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
Current.drawable = gimp_drawable_get (param[2].data.d_drawable);
Current.mask = gimp_drawable_get (gimp_image_get_selection (param[1].data.d_image));
if (gimp_drawable_is_rgb (Current.drawable->drawable_id))
{
if (color_rotate_dialog ())
{
gimp_progress_init (_("Rotating the colors"));
gimp_tile_cache_ntiles (2 * (Current.drawable->width /
gimp_tile_width () + 1));
color_rotate (Current.drawable);
gimp_displays_flush ();
}
else
{
status = GIMP_PDB_CANCEL;
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
if (status == GIMP_PDB_SUCCESS)
gimp_drawable_detach (Current.drawable);
}
/* Rotate colors of a single row */
static void
color_rotate_row (const guchar *src_row,
guchar *dest_row,
gint row,
gint row_width,
gint bytes)
{
gint col, bytenum;
gdouble H, S, V;
guchar rgb[3];
for (col = 0; col < row_width; col++)
{
gboolean skip = FALSE;
rgb[0] = src_row[col * bytes + 0];
rgb[1] = src_row[col * bytes + 1];
rgb[2] = src_row[col * bytes + 2];
gimp_rgb_to_hsv4 (rgb, &H, &S, &V);
if (rcm_is_gray (S))
{
if (Current.Gray_to_from == GRAY_FROM)
{
if (rcm_angle_inside_slice (Current.Gray->hue,
Current.From->angle) <= 1)
{
H = Current.Gray->hue / TP;
S = Current.Gray->satur;
}
else
{
skip = TRUE;
}
}
else
{
skip = TRUE;
gimp_hsv_to_rgb4 (rgb, Current.Gray->hue / TP,
Current.Gray->satur, V);
}
}
if (! skip)
{
H = rcm_linear (rcm_left_end (Current.From->angle),
rcm_right_end (Current.From->angle),
rcm_left_end (Current.To->angle),
rcm_right_end (Current.To->angle),
H * TP);
H = angle_mod_2PI (H) / TP;
gimp_hsv_to_rgb4 (rgb, H, S, V);
}
dest_row[col * bytes + 0] = rgb[0];
dest_row[col * bytes + 1] = rgb[1];
dest_row[col * bytes + 2] = rgb[2];
if (bytes > 3)
{
for (bytenum = 3; bytenum < bytes; bytenum++)
dest_row[col * bytes + bytenum] = src_row[col * bytes + bytenum];
}
}
}
/* Rotate colors row by row ... */
static void
color_rotate (GimpDrawable *drawable)
{
GimpPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *src_row, *dest_row;
gint row;
gint x1, y1, x2, y2;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
src_row = g_new (guchar, (x2 - x1) * bytes);
dest_row = g_new (guchar, (x2 - x1) * bytes);
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
for (row = y1; row < y2; row++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, x1, row, (x2 - x1));
color_rotate_row (src_row, dest_row, row, (x2 - x1), bytes);
gimp_pixel_rgn_set_row (&destPR, dest_row, x1, row, (x2 - x1));
if ((row % 10) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
/* update the processed region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
g_free (src_row);
g_free (dest_row);
}
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