/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Decompose plug-in (C) 1997 Peter Kirchgessner
* e-mail: peter@kirchgessner.net, WWW: http://www.kirchgessner.net
*
* 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 .
*/
/*
* This filter decomposes RGB-images into several types of channels
*/
/* Lab colorspace support originally written by Alexey Dyachenko,
* merged into the officical plug-in by Sven Neumann.
*/
#include "config.h"
#include
#include
#include
#include "libgimp/stdplugins-intl.h"
/* cbrt() is a GNU extension, which C99 accepted */
#if !defined (__GLIBC__) && !(defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
#define cbrt(x) (pow(x, 1.0/3.0))
#endif
#define PLUG_IN_PROC "plug-in-decompose"
#define PLUG_IN_PROC_REG "plug-in-decompose-registered"
#define PLUG_IN_BINARY "decompose"
#define PLUG_IN_ROLE "gimp-decompose"
/* 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 gint32 decompose (gint32 image_id,
gint32 drawable_ID,
const gchar *extract_type,
gint32 *image_ID_dst,
gint32 *num_layers,
gint32 *layer_ID_dst);
static gint32 create_new_image (const gchar *filename,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
gdouble xres,
gdouble yres,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn);
static gint32 create_new_layer (gint32 image_ID,
gint position,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn);
static void transfer_registration_color (const guchar *src,
gint bpp, gint numpix, guchar **dst,
gint num_channels);
static void extract_rgb (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_red (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_green (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_blue (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_rgba (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_alpha (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_hsv (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_hsl (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_hue (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_sat (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_val (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_huel (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_satl (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_lightness (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_cmy (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_cyan (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_magenta (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_yellow (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_cmyk (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_cyank (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_magentak (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_yellowk (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_lab (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_ycbcr470 (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_ycbcr709 (const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_ycbcr470f(const guchar *src,
gint bpp, gint numpix, guchar **dst);
static void extract_ycbcr709f(const guchar *src,
gint bpp, gint numpix, guchar **dst);
static gboolean decompose_dialog (void);
/* Maximum number of images/layers generated by an extraction */
#define MAX_EXTRACT_IMAGES 4
/* Description of an extraction */
typedef struct
{
const gchar *type; /* What to extract */
gboolean dialog; /* Dialog-Flag. Set it to TRUE if you want to appear
* this extract function within the dialog */
gint num_images; /* Number of images to create */
/* Names of channels to extract */
const gchar *channel_name[MAX_EXTRACT_IMAGES];
/* Function that performs the extraction */
void (* extract_fun) (const guchar *src,
int bpp,
gint numpix,
guchar **dst);
} EXTRACT;
static EXTRACT extract[] =
{
{ N_("RGB"), TRUE, 3, { N_("red"),
N_("green"),
N_("blue") }, extract_rgb },
{ N_("Red"), FALSE, 1, { N_("red") }, extract_red },
{ N_("Green"), FALSE, 1, { N_("green") }, extract_green },
{ N_("Blue"), FALSE, 1, { N_("blue") }, extract_blue },
{ N_("RGBA"), TRUE, 4, { N_("red"),
N_("green"),
N_("blue"),
N_("alpha") }, extract_rgba },
{ N_("HSV"), TRUE, 3, { N_("hue"),
N_("saturation"),
N_("value") }, extract_hsv },
{ N_("Hue"), FALSE, 1, { N_("hue") }, extract_hue },
{ N_("Saturation"), FALSE, 1, { N_("saturation") }, extract_sat },
{ N_("Value"), FALSE, 1, { N_("value") }, extract_val },
{ N_("HSL"), TRUE, 3, { N_("hue_l"),
N_("saturation_l"),
N_("lightness") }, extract_hsl },
{ N_("Hue (HSL)"), FALSE, 1, { N_("hue_l") }, extract_huel },
{ N_("Saturation (HSL)"), FALSE, 1, { N_("saturation_l") }, extract_satl },
{ N_("Lightness"), FALSE, 1, { N_("lightness")}, extract_lightness },
{ N_("CMY"), TRUE, 3, { N_("cyan"),
N_("magenta"),
N_("yellow") }, extract_cmy },
{ N_("Cyan"), FALSE, 1, { N_("cyan") }, extract_cyan },
{ N_("Magenta"), FALSE, 1, { N_("magenta") }, extract_magenta },
{ N_("Yellow"), FALSE, 1, { N_("yellow") }, extract_yellow },
{ N_("CMYK"), TRUE, 4, { N_("cyan-k"),
N_("magenta-k"),
N_("yellow-k"),
N_("black") }, extract_cmyk },
{ N_("Cyan_K"), FALSE, 1, { N_("cyan-k") }, extract_cyank },
{ N_("Magenta_K"), FALSE, 1, { N_("magenta-k") }, extract_magentak },
{ N_("Yellow_K"), FALSE, 1, { N_("yellow-k") }, extract_yellowk },
{ N_("Alpha"), TRUE, 1, { N_("alpha") }, extract_alpha },
{ N_("LAB"), TRUE, 3, { "L",
"A",
"B" }, extract_lab },
{ "YCbCr_ITU_R470", TRUE, 3, { N_("luma-y470"),
N_("blueness-cb470"),
N_("redness-cr470") }, extract_ycbcr470 },
{ "YCbCr_ITU_R709", TRUE, 3, { N_("luma-y709"),
N_("blueness-cb709"),
N_("redness-cr709") }, extract_ycbcr709 },
{ "YCbCr ITU R470 256", TRUE, 3, { N_("luma-y470f"),
N_("blueness-cb470f"),
N_("redness-cr470f") }, extract_ycbcr470f },
{ "YCbCr ITU R709 256", TRUE, 3, { N_("luma-y709f"),
N_("blueness-cb709f"),
N_("redness-cr709f") }, extract_ycbcr709f }
};
typedef struct
{
gchar extract_type[32];
gboolean as_layers;
gboolean use_registration;
} DecoVals;
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static DecoVals decovals =
{
"rgb", /* Decompose type */
TRUE, /* Decompose to Layers */
FALSE /* use registration color */
};
static GimpRunMode run_mode;
MAIN ()
static void
query (void)
{
static 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_STRING, "decompose-type", NULL },
{ GIMP_PDB_INT32, "layers-mode", "Create channels as layers in a single image" }
};
static const GimpParamDef return_vals[] =
{
{ GIMP_PDB_IMAGE, "new-image", "Output gray image" },
{ GIMP_PDB_IMAGE, "new-image", "Output gray image (N/A for single channel extract)" },
{ GIMP_PDB_IMAGE, "new-image", "Output gray image (N/A for single channel extract)" },
{ GIMP_PDB_IMAGE, "new-image", "Output gray image (N/A for single channel extract)" }
};
GString *type_desc;
int i;
type_desc = g_string_new ("What to decompose: ");
g_string_append_c (type_desc, '"');
g_string_append (type_desc, extract[0].type);
g_string_append_c (type_desc, '"');
for (i = 1; i < G_N_ELEMENTS (extract); i++)
{
g_string_append (type_desc, ", ");
g_string_append_c (type_desc, '"');
g_string_append (type_desc, extract[i].type);
g_string_append_c (type_desc, '"');
}
args[3].description = type_desc->str;
gimp_install_procedure (PLUG_IN_PROC,
N_("Decompose an image into separate colorspace components"),
"This function creates new gray images with "
"different channel information in each of them",
"Peter Kirchgessner",
"Peter Kirchgessner",
"1997",
N_("_Decompose..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args, return_vals);
gimp_install_procedure (PLUG_IN_PROC_REG,
N_("Decompose an image into separate colorspace components"),
"This function creates new gray images with "
"different channel information in each of them. "
"Pixels in the foreground color will appear black "
"in all output images. This can be used for "
"things like crop marks that have to show up on "
"all channels.",
"Peter Kirchgessner",
"Peter Kirchgessner, Clarence Risher",
"1997",
N_("_Decompose..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args, return_vals);
gimp_plugin_menu_register (PLUG_IN_PROC_REG, "/Colors/Components");
g_string_free (type_desc, TRUE);
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[MAX_EXTRACT_IMAGES + 1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 num_images;
gint32 image_ID_extract[MAX_EXTRACT_IMAGES];
gint32 layer_ID_extract[MAX_EXTRACT_IMAGES];
gint j;
gint32 layer;
gint32 num_layers;
gint32 image_ID;
INIT_I18N ();
run_mode = param[0].data.d_int32;
image_ID = param[1].data.d_image;
layer = param[2].data.d_drawable;
*nreturn_vals = MAX_EXTRACT_IMAGES+1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
for (j = 0; j < MAX_EXTRACT_IMAGES; j++)
{
values[j+1].type = GIMP_PDB_IMAGE;
values[j+1].data.d_int32 = -1;
}
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &decovals);
/* First acquire information with a dialog */
if (! decompose_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 4 && nparams != 5 && nparams != 6)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
strncpy (decovals.extract_type, param[3].data.d_string,
sizeof (decovals.extract_type));
decovals.extract_type[sizeof (decovals.extract_type)-1] = '\0';
decovals.as_layers = nparams > 4 ? param[4].data.d_int32 : FALSE;
decovals.use_registration = (strcmp (name, PLUG_IN_PROC_REG) == 0);
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &decovals);
break;
default:
break;
}
/* Make sure that the drawable is RGB color */
if (gimp_drawable_type_with_alpha (layer) != GIMP_RGBA_IMAGE)
{
g_message ("Can only work on RGB images.");
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
gimp_progress_init (_("Decomposing"));
num_images = decompose (image_ID, layer,
decovals.extract_type,
image_ID_extract,
&num_layers,
layer_ID_extract);
if (num_images <= 0)
{
status = GIMP_PDB_EXECUTION_ERROR;
}
else
{
/* create decompose-data parasite */
GString *data = g_string_new ("");
g_string_printf (data, "source=%d type=%s ",
layer, decovals.extract_type);
for (j = 0; j < num_layers; j++)
g_string_append_printf (data, "%d ", layer_ID_extract[j]);
for (j = 0; j < num_images; j++)
{
GimpParasite *parasite;
values[j+1].data.d_int32 = image_ID_extract[j];
gimp_image_undo_enable (image_ID_extract[j]);
gimp_image_clean_all (image_ID_extract[j]);
parasite = gimp_parasite_new ("decompose-data",
0, data->len + 1, data->str);
gimp_image_attach_parasite (image_ID_extract[j], parasite);
gimp_parasite_free (parasite);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_display_new (image_ID_extract[j]);
}
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &decovals, sizeof (DecoVals));
}
gimp_progress_end ();
}
values[0].data.d_status = status;
}
/* Decompose an image. It returns the number of new (gray) images.
The image IDs for the new images are returned in image_ID_dst.
On failure, -1 is returned.
*/
static gint32
decompose (gint32 image_ID,
gint32 drawable_ID,
const gchar *extract_type,
gint32 *image_ID_dst,
gint32 *nlayers,
gint32 *layer_ID_dst)
{
const gchar *layername;
gint i, j, extract_idx, scan_lines;
gint height, width, tile_height, num_layers;
gchar *filename;
guchar *src;
guchar *dst[MAX_EXTRACT_IMAGES];
GimpDrawable *drawable_src;
GimpDrawable *drawable_dst[MAX_EXTRACT_IMAGES];
GimpPixelRgn pixel_rgn_src;
GimpPixelRgn pixel_rgn_dst[MAX_EXTRACT_IMAGES];
extract_idx = -1; /* Search extract type */
for (j = 0; j < G_N_ELEMENTS (extract); j++)
{
if (g_ascii_strcasecmp (extract_type, extract[j].type) == 0)
{
extract_idx = j;
break;
}
}
if (extract_idx < 0)
return -1;
/* Check structure of source image */
drawable_src = gimp_drawable_get (drawable_ID);
if (drawable_src->bpp < 3)
{
g_message ("Not an RGB image.");
return -1;
}
if ((extract[extract_idx].extract_fun == extract_alpha ||
extract[extract_idx].extract_fun == extract_rgba) &&
(!gimp_drawable_has_alpha (drawable_ID)))
{
g_message ("No alpha channel available.");
return -1;
}
width = drawable_src->width;
height = drawable_src->height;
tile_height = gimp_tile_height ();
gimp_pixel_rgn_init (&pixel_rgn_src, drawable_src, 0, 0, width, height,
FALSE, FALSE);
/* allocate a buffer for retrieving information from the src pixel region */
src = g_new (guchar, tile_height * width * drawable_src->bpp);
/* Create all new gray images */
num_layers = extract[extract_idx].num_images;
if (num_layers > MAX_EXTRACT_IMAGES)
num_layers = MAX_EXTRACT_IMAGES;
for (j = 0; j < num_layers; j++)
{
/* Build a filename like -. */
gchar *fname;
gchar *extension;
gdouble xres, yres;
fname = gimp_image_get_filename (image_ID);
if (fname)
{
extension = fname + strlen (fname) - 1;
while (extension >= fname)
{
if (*extension == '.') break;
extension--;
}
if (extension >= fname)
{
*(extension++) = '\0';
if (decovals.as_layers)
filename = g_strdup_printf ("%s-%s.%s", fname,
gettext (extract[extract_idx].type),
extension);
else
filename = g_strdup_printf ("%s-%s.%s", fname,
gettext (extract[extract_idx].channel_name[j]),
extension);
}
else
{
if (decovals.as_layers)
filename = g_strdup_printf ("%s-%s", fname,
gettext (extract[extract_idx].type));
else
filename = g_strdup_printf ("%s-%s", fname,
gettext (extract[extract_idx].channel_name[j]));
}
}
else
{
filename = g_strdup (gettext (extract[extract_idx].channel_name[j]));
}
gimp_image_get_resolution (image_ID, &xres, &yres);
if (decovals.as_layers)
{
layername = gettext (extract[extract_idx].channel_name[j]);
if (j == 0)
image_ID_dst[j] = create_new_image (filename, layername,
width, height, GIMP_GRAY,
xres, yres,
layer_ID_dst + j,
drawable_dst + j,
pixel_rgn_dst + j);
else
layer_ID_dst[j] = create_new_layer (image_ID_dst[0], j, layername,
width, height, GIMP_GRAY,
drawable_dst + j,
pixel_rgn_dst + j);
}
else
{
image_ID_dst[j] = create_new_image (filename, NULL,
width, height, GIMP_GRAY,
xres, yres,
layer_ID_dst + j,
drawable_dst + j,
pixel_rgn_dst + j);
}
g_free (filename);
g_free (fname);
dst[j] = g_new (guchar, tile_height * width);
}
i = 0;
while (i < height)
{
/* Get source pixel region */
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i);
gimp_pixel_rgn_get_rect (&pixel_rgn_src, src, 0, i, width, scan_lines);
/* Extract the channel information */
extract[extract_idx].extract_fun (src, drawable_src->bpp, scan_lines*width,
dst);
/* Transfer the registration color */
if (decovals.use_registration)
transfer_registration_color (src, drawable_src->bpp, scan_lines*width,
dst, extract[extract_idx].num_images);
/* Set destination pixel regions */
for (j = 0; j < num_layers; j++)
gimp_pixel_rgn_set_rect (&(pixel_rgn_dst[j]), dst[j], 0, i, width,
scan_lines);
i += scan_lines;
gimp_progress_update ((gdouble) i / (gdouble) height);
}
gimp_progress_update (1.0);
g_free (src);
for (j = 0; j < num_layers; j++)
{
gimp_drawable_detach (drawable_dst[j]);
gimp_drawable_update (layer_ID_dst[j], 0, 0,
gimp_drawable_width (layer_ID_dst[j]),
gimp_drawable_height (layer_ID_dst[j]));
gimp_layer_add_alpha (layer_ID_dst[j]);
g_free (dst[j]);
}
gimp_drawable_detach (drawable_src);
*nlayers = num_layers;
return (decovals.as_layers ? 1 : num_layers);
}
/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */
static gint32
create_new_image (const gchar *filename,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
gdouble xres,
gdouble yres,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn)
{
gint32 image_ID;
image_ID = gimp_image_new (width, height, type);
gimp_image_undo_disable (image_ID);
gimp_image_set_filename (image_ID, filename);
gimp_image_set_resolution (image_ID, xres, yres);
*layer_ID = create_new_layer (image_ID, 0,
layername, width, height, type,
drawable, pixel_rgn);
return image_ID;
}
static gint32
create_new_layer (gint32 image_ID,
gint position,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn)
{
gint32 layer_ID;
GimpImageType gdtype = GIMP_RGB_IMAGE;
switch (type)
{
case GIMP_RGB:
gdtype = GIMP_RGB_IMAGE;
break;
case GIMP_GRAY:
gdtype = GIMP_GRAY_IMAGE;
break;
case GIMP_INDEXED:
gdtype = GIMP_INDEXED_IMAGE;
break;
}
if (!layername)
layername = _("Background");
layer_ID = gimp_layer_new (image_ID, layername, width, height,
gdtype, 100, GIMP_NORMAL_MODE);
gimp_image_insert_layer (image_ID, layer_ID, -1, position);
*drawable = gimp_drawable_get (layer_ID);
gimp_pixel_rgn_init (pixel_rgn, *drawable, 0, 0, (*drawable)->width,
(*drawable)->height, TRUE, FALSE);
return layer_ID;
}
/* Registration Color function */
static void
transfer_registration_color (const guchar *src,
gint bpp,
gint numpix,
guchar **dst,
gint num_channels)
{
register const guchar *rgb_src = src;
guchar *dsts[4];
register gint count = numpix;
gint channel;
GimpRGB color;
guchar red, green, blue;
gimp_context_get_foreground (&color);
gimp_rgb_get_uchar (&color, &red, &green, &blue);
for (channel = 0; channel < num_channels; channel++)
dsts[channel] = dst[channel];
while (count-- > 0)
{
if (rgb_src[0] == red && rgb_src[1] == green && rgb_src[2] == blue)
for (channel = 0; channel < num_channels; channel++)
*(dsts[channel]++) = 255;
else
for (channel = 0; channel < num_channels; channel++)
dsts[channel]++;
rgb_src += bpp;
}
}
/* Extract functions */
static void
extract_rgb (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *red_dst = dst[0];
register guchar *green_dst = dst[1];
register guchar *blue_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
*(red_dst++) = *(rgb_src++);
*(green_dst++) = *(rgb_src++);
*(blue_dst++) = *(rgb_src++);
rgb_src += offset;
}
}
static void
extract_rgba (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgba_src = src;
register guchar *red_dst = dst[0];
register guchar *green_dst = dst[1];
register guchar *blue_dst = dst[2];
register guchar *alpha_dst = dst[3];
register gint count = numpix, offset = bpp-4;
while (count-- > 0)
{
*(red_dst++) = *(rgba_src++);
*(green_dst++) = *(rgba_src++);
*(blue_dst++) = *(rgba_src++);
*(alpha_dst++) = *(rgba_src++);
rgba_src += offset;
}
}
static void
extract_red (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *red_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
*(red_dst++) = *rgb_src;
rgb_src += offset;
}
}
static void
extract_green (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src+1;
register guchar *green_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
*(green_dst++) = *rgb_src;
rgb_src += offset;
}
}
static void
extract_blue (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src+2;
register guchar *blue_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
*(blue_dst++) = *rgb_src;
rgb_src += offset;
}
}
static void
extract_alpha (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src+3;
register guchar *alpha_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
*(alpha_dst++) = *rgb_src;
rgb_src += offset;
}
}
static void
extract_cmy (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *cyan_dst = dst[0];
register guchar *magenta_dst = dst[1];
register guchar *yellow_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
*(cyan_dst++) = 255 - *(rgb_src++);
*(magenta_dst++) = 255 - *(rgb_src++);
*(yellow_dst++) = 255 - *(rgb_src++);
rgb_src += offset;
}
}
static void
extract_hsv (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *hue_dst = dst[0];
register guchar *sat_dst = dst[1];
register guchar *val_dst = dst[2];
register gint count = numpix, offset = bpp;
gdouble hue, sat, val;
while (count-- > 0)
{
gimp_rgb_to_hsv4 (rgb_src, &hue, &sat, &val);
*hue_dst++ = (guchar) (hue * 255.999);
*sat_dst++ = (guchar) (sat * 255.999);
*val_dst++ = (guchar) (val * 255.999);
rgb_src += offset;
}
}
static void
extract_hue (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *hue_dst = dst[0];
register gint count = numpix, offset = bpp;
gdouble hue, dummy;
while (count-- > 0)
{
gimp_rgb_to_hsv4 (rgb_src, &hue, &dummy, &dummy);
*hue_dst++ = (guchar) (hue * 255.999);
rgb_src += offset;
}
}
static void
extract_sat (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *sat_dst = dst[0];
register gint count = numpix, offset = bpp;
gdouble sat, dummy;
while (count-- > 0)
{
gimp_rgb_to_hsv4 (rgb_src, &dummy, &sat, &dummy);
*sat_dst++ = (guchar) (sat * 255.999);
rgb_src += offset;
}
}
static void
extract_val (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *val_dst = dst[0];
register gint count = numpix, offset = bpp;
gdouble val, dummy;
while (count-- > 0)
{
gimp_rgb_to_hsv4 (rgb_src, &dummy, &dummy, &val);
*val_dst++ = (guchar) (val * 255.999);
rgb_src += offset;
}
}
static void
extract_hsl (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *hue_dst = dst[0];
register guchar *sat_dst = dst[1];
register guchar *lum_dst = dst[2];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
GimpRGB rgb;
GimpHSL hsl;
gimp_rgb_set_uchar (&rgb, rgb_src[0], rgb_src[1], rgb_src[2]);
gimp_rgb_to_hsl (&rgb, &hsl);
*hue_dst++ = (guchar) (hsl.h * 255.999);
*sat_dst++ = (guchar) (hsl.s * 255.999);
*lum_dst++ = (guchar) (hsl.l * 255.999);
rgb_src += offset;
}
}
static void
extract_huel (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *hue_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
GimpRGB rgb;
GimpHSL hsl;
gimp_rgb_set_uchar (&rgb, rgb_src[0], rgb_src[1], rgb_src[2]);
gimp_rgb_to_hsl (&rgb, &hsl);
*hue_dst++ = (guchar) (hsl.h * 255.999);
rgb_src += offset;
}
}
static void
extract_satl (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *sat_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
GimpRGB rgb;
GimpHSL hsl;
gimp_rgb_set_uchar (&rgb, rgb_src[0], rgb_src[1], rgb_src[2]);
gimp_rgb_to_hsl (&rgb, &hsl);
*sat_dst++ = (guchar) (hsl.s * 255.999);
rgb_src += offset;
}
}
static void
extract_lightness (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *lum_dst = dst[0];
register gint count = numpix, offset = bpp;
while (count-- > 0)
{
GimpRGB rgb;
GimpHSL hsl;
gimp_rgb_set_uchar (&rgb, rgb_src[0], rgb_src[1], rgb_src[2]);
gimp_rgb_to_hsl (&rgb, &hsl);
*lum_dst++ = (guchar) (hsl.l * 255.999);
rgb_src += offset;
}
}
static void
extract_cyan (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *cyan_dst = dst[0];
register gint count = numpix, offset = bpp-1;
while (count-- > 0)
{
*(cyan_dst++) = 255 - *(rgb_src++);
rgb_src += offset;
}
}
static void
extract_magenta (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src+1;
register guchar *magenta_dst = dst[0];
register gint count = numpix, offset = bpp-1;
while (count-- > 0)
{
*(magenta_dst++) = 255 - *(rgb_src++);
rgb_src += offset;
}
}
static void
extract_yellow (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src+2;
register guchar *yellow_dst = dst[0];
register gint count = numpix, offset = bpp-1;
while (count-- > 0)
{
*(yellow_dst++) = 255 - *(rgb_src++);
rgb_src += offset;
}
}
static void
extract_cmyk (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *cyan_dst = dst[0];
register guchar *magenta_dst = dst[1];
register guchar *yellow_dst = dst[2];
register guchar *black_dst = dst[3];
register gint count = numpix, offset = bpp-3;
GimpCMYK gcmyk;
gimp_cmyk_set (&gcmyk, 0, 0, 0, 0);
while (count-- > 0)
{
GimpRGB grgb;
guchar r, g, b;
r = *rgb_src++;
g = *rgb_src++;
b = *rgb_src++;
gimp_rgb_set_uchar (&grgb, r,g,b);
gimp_rgb_to_cmyk (&grgb, 1.0, &gcmyk);
gimp_cmyk_get_uchar (&gcmyk,
cyan_dst++, magenta_dst++, yellow_dst++,
black_dst++);
rgb_src += offset;
}
}
static void
extract_cyank (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *cyan_dst = dst[0];
register gint count = numpix, offset = bpp-3;
GimpCMYK gcmyk;
gimp_cmyk_set(&gcmyk, 0, 0, 0, 0);
while (count-- > 0)
{
GimpRGB grgb;
guchar r, g, b;
r = *rgb_src++;
g = *rgb_src++;
b = *rgb_src++;
gimp_rgb_set_uchar (&grgb, r,g,b);
gimp_rgb_to_cmyk (&grgb, 1.0, &gcmyk);
gimp_cmyk_get_uchar (&gcmyk, cyan_dst++, NULL, NULL, NULL);
rgb_src += offset;
}
}
static void
extract_magentak (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *magenta_dst = dst[0];
register gint count = numpix, offset = bpp-3;
GimpCMYK gcmyk;
gimp_cmyk_set(&gcmyk, 0, 0, 0, 0);
while (count-- > 0)
{
GimpRGB grgb;
guchar r, g, b;
r = *rgb_src++;
g = *rgb_src++;
b = *rgb_src++;
gimp_rgb_set_uchar (&grgb, r,g,b);
gimp_rgb_to_cmyk (&grgb, 1.0, &gcmyk);
gimp_cmyk_get_uchar (&gcmyk, NULL, magenta_dst++, NULL, NULL);
rgb_src += offset;
}
}
static void
extract_yellowk (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *yellow_dst = dst[0];
register gint count = numpix, offset = bpp-3;
GimpCMYK gcmyk;
gimp_cmyk_set(&gcmyk, 0, 0, 0, 0);
while (count-- > 0)
{
GimpRGB grgb;
guchar r, g, b;
r = *rgb_src++;
g = *rgb_src++;
b = *rgb_src++;
gimp_rgb_set_uchar (&grgb, r,g,b);
gimp_rgb_to_cmyk (&grgb, 1.0, &gcmyk);
gimp_cmyk_get_uchar (&gcmyk, NULL, NULL, yellow_dst++, NULL);
rgb_src += offset;
}
}
static void
extract_lab (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *l_dst = dst[0];
register guchar *a_dst = dst[1];
register guchar *b_dst = dst[2];
register gint count = numpix, offset = bpp;
gdouble red, green, blue;
gdouble x, y, z;
gdouble l; /*, a, b; */
gdouble tx, ty, tz;
gdouble ftx, fty, ftz;
gdouble sixteenth = 16.0 / 116.0;
/* LAB colorspace constants */
#define LAB_Xn 0.951
#define LAB_Yn 1.0
#define LAB_Zn 1.089
while (count-- > 0)
{
red = rgb_src[0] / 255.0;
green = rgb_src[1] / 255.0;
blue = rgb_src[2] / 255.0;
x = 0.431 * red + 0.342 * green + 0.178 * blue;
y = 0.222 * red + 0.707 * green + 0.071 * blue;
z = 0.020 * red + 0.130 * green + 0.939 * blue;
if ((ty = y / LAB_Yn) > 0.008856)
{
l = 116.0 * cbrt (ty) - 16.0;
fty = cbrt (ty);
}
else
{
l = 903.3 * ty;
fty = 7.78 * ty + sixteenth;
}
ftx = ((tx = x / LAB_Xn) > 0.008856) ? cbrt (tx) : 7.78 * tx + sixteenth;
ftz = ((tz = z / LAB_Zn) > 0.008856) ? cbrt (tz) : 7.78 * tz + sixteenth;
*l_dst++ = (guchar) CLAMP (l * 2.5599, 0., 256.);
*a_dst++ = (guchar) CLAMP (128.0 + (ftx - fty) * 635, 0., 256.);
*b_dst++ = (guchar) CLAMP (128.0 + (fty - ftz) * 254, 0., 256.);
rgb_src += offset;
}
}
/* these are here so the code is more readable and we can use
the standard values instead of some scaled and rounded fixpoint values */
#define FIX(a) ((int)((a)*256.0*256.0 + 0.5))
#define FIXY(a) ((int)((a)*256.0*256.0*219.0/255.0 + 0.5))
#define FIXC(a) ((int)((a)*256.0*256.0*224.0/255.0 + 0.5))
static void
extract_ycbcr470 (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *y_dst = dst[0];
register guchar *cb_dst = dst[1];
register guchar *cr_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
register int r, g, b;
r= *(rgb_src++);
g= *(rgb_src++);
b= *(rgb_src++);
*(y_dst++) = ( FIXY(0.2989)*r + FIXY(0.5866)*g + FIXY(0.1145)*b + FIX( 16.5))>>16;
*(cb_dst++) = (-FIXC(0.1688)*r - FIXC(0.3312)*g + FIXC(0.5000)*b + FIX(128.5))>>16;
*(cr_dst++) = ( FIXC(0.5000)*r - FIXC(0.4184)*g - FIXC(0.0816)*b + FIX(128.5))>>16;
rgb_src += offset;
}
}
static void
extract_ycbcr709 (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *y_dst = dst[0];
register guchar *cb_dst = dst[1];
register guchar *cr_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
register int r, g, b;
r= *(rgb_src++);
g= *(rgb_src++);
b= *(rgb_src++);
*(y_dst++) = ( FIXY(0.2126)*r + FIXY(0.7152)*g + FIXY(0.0722)*b + FIX( 16.5))>>16;
*(cb_dst++) = (-FIXC(0.1150)*r - FIXC(0.3860)*g + FIXC(0.5000)*b + FIX(128.5))>>16;
*(cr_dst++) = ( FIXC(0.5000)*r - FIXC(0.4540)*g - FIXC(0.0460)*b + FIX(128.5))>>16;
rgb_src += offset;
}
}
static void
extract_ycbcr470f (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *y_dst = dst[0];
register guchar *cb_dst = dst[1];
register guchar *cr_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
register int r, g, b, cb, cr;
r= *(rgb_src++);
g= *(rgb_src++);
b= *(rgb_src++);
*(y_dst++ ) = ( FIX(0.2989)*r + FIX(0.5866)*g + FIX(0.1145)*b + FIX( 0.5))>>16;
cb = (-FIX(0.1688)*r - FIX(0.3312)*g + FIX(0.5000)*b + FIX(128.5))>>16;
cr = ( FIX(0.5000)*r - FIX(0.4184)*g - FIX(0.0816)*b + FIX(128.5))>>16;
if(cb>255) cb=255;
if(cr>255) cr=255;
*(cb_dst++) = cb;
*(cr_dst++) = cr;
rgb_src += offset;
}
}
static void
extract_ycbcr709f (const guchar *src,
gint bpp,
gint numpix,
guchar **dst)
{
register const guchar *rgb_src = src;
register guchar *y_dst = dst[0];
register guchar *cb_dst = dst[1];
register guchar *cr_dst = dst[2];
register gint count = numpix, offset = bpp-3;
while (count-- > 0)
{
register int r, g, b, cb, cr;
r= *(rgb_src++);
g= *(rgb_src++);
b= *(rgb_src++);
*(y_dst++) = ( FIX(0.2126)*r + FIX(0.7152)*g + FIX(0.0722)*b + FIX( 0.5))>>16;
cb = (-FIX(0.1150)*r - FIX(0.3860)*g + FIX(0.5000)*b + FIX(128.5))>>16;
cr = ( FIX(0.5000)*r - FIX(0.4540)*g - FIX(0.0460)*b + FIX(128.5))>>16;
if(cb>255) cb=255;
if(cr>255) cr=255;
*(cb_dst++) = cb;
*(cr_dst++) = cr;
rgb_src += offset;
}
}
static gboolean
decompose_dialog (void)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *combo;
GtkWidget *toggle;
gint j;
gint extract_idx;
gboolean run;
extract_idx = 0;
for (j = 0; j < G_N_ELEMENTS (extract); j++)
{
if (extract[j].dialog &&
g_ascii_strcasecmp (decovals.extract_type, extract[j].type) == 0)
{
extract_idx = j;
break;
}
}
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Decompose"), 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);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
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);
frame = gimp_frame_new (_("Extract Channels"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Color _model:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
combo = g_object_new (GIMP_TYPE_INT_COMBO_BOX, NULL);
for (j = 0; j < G_N_ELEMENTS (extract); j++)
{
if (extract[j].dialog)
{
gchar *label = g_strdup (gettext (extract[j].type));
gchar *l;
for (l = label; *l; l++)
if (*l == '-' || *l == '_')
*l = ' ';
gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (combo),
GIMP_INT_STORE_LABEL, label,
GIMP_INT_STORE_VALUE, j,
-1);
g_free (label);
}
}
gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
gtk_widget_show (combo);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
extract_idx,
G_CALLBACK (gimp_int_combo_box_get_active),
&extract_idx);
toggle = gtk_check_button_new_with_mnemonic (_("_Decompose to layers"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
decovals.as_layers);
gtk_box_pack_start (GTK_BOX (main_vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&decovals.as_layers);
toggle =
gtk_check_button_new_with_mnemonic (_("_Foreground as registration color"));
gimp_help_set_help_data (toggle, _("Pixels in the foreground color will "
"appear black in all output images. "
"This can be used for things like crop "
"marks that have to show up on all "
"channels."), PLUG_IN_PROC);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
decovals.use_registration);
gtk_box_pack_start (GTK_BOX (main_vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&decovals.use_registration);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
if (run)
strncpy (decovals.extract_type, extract[extract_idx].type, sizeof decovals.extract_type - 1);
return run;
}