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gimp/plug-ins/common/decompose.c

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/* 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
*
* Copyright 2013 Martijn van Beers <mail_dev@martijn.at>
* Copyright 2013 Téo Mazars <teo.mazars@ensimag.fr>
*
* 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 <https://www.gnu.org/licenses/>.
*/
/* Lab colorspace support originally written by Alexey Dyachenko,
* merged into the officical plug-in by Sven Neumann.
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-decompose"
#define PLUG_IN_BINARY "decompose"
#define PLUG_IN_ROLE "gimp-decompose"
/* Description of a component */
typedef struct
{
const gchar *babl_name; /* channel's babl_component name */
const gchar *channel_name; /* name of channel to extract */
const gdouble range_min; /* min and max */
const gdouble range_max;
const gboolean perceptual_channel; /* "correct" the channel in Y' space */
} Component;
/* 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 */
const gchar *model; /* the babl_model string to use */
const gboolean dialog; /* Set to TRUE if you want
* this extract function in the dialog */
const gint num_images; /* Number of images to create */
const gboolean clamp; /* clamping values in [0.0, 1.0] */
/* the babl_component names of the channels */
const Component component[MAX_EXTRACT_IMAGES];
} Extract;
typedef struct _Decompose Decompose;
typedef struct _DecomposeClass DecomposeClass;
struct _Decompose
{
GimpPlugIn parent_instance;
};
struct _DecomposeClass
{
GimpPlugInClass parent_class;
};
#define DECOMPOSE_TYPE (decompose_get_type ())
#define DECOMPOSE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), DECOMPOSE_TYPE, Decompose))
GType decompose_get_type (void) G_GNUC_CONST;
static GList * decompose_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * decompose_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * decompose_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable **drawables,
GimpProcedureConfig *config,
gpointer run_data);
static gint decompose (GimpImage *image,
GimpDrawable *drawable,
GObject *config,
GimpImage **image_dst,
gint32 *num_layers,
GimpLayer **layer_dst);
static GimpImage * create_new_image (GFile *file,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
GimpPrecision precision,
gdouble xres,
gdouble yres,
GimpLayer **layer);
static GimpLayer * create_new_layer (GimpImage *image,
gint position,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type);
static void transfer_registration_color (GeglBuffer *src,
GeglBuffer **dst,
gint count);
static void cpn_affine_transform_clamp (GeglBuffer *buffer,
gdouble min,
gdouble max,
gboolean clamp);
static void copy_n_components (GeglBuffer *src,
GeglBuffer **dst,
Extract ext);
static void copy_one_component (GeglBuffer *src,
GeglBuffer *dst,
const char *model,
const Component component,
gboolean clamp);
static gboolean decompose_dialog (GimpProcedure *procedure,
GObject *config);
static gchar * generate_filename (GimpImage *image,
GObject *config,
guint colorspace,
guint channel);
G_DEFINE_TYPE (Decompose, decompose, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (DECOMPOSE_TYPE)
DEFINE_STD_SET_I18N
#define CPN_RGBA_R { "R", N_("red"), 0.0, 1.0, FALSE }
#define CPN_RGBA_G { "G", N_("green"), 0.0, 1.0, FALSE }
#define CPN_RGBA_B { "B", N_("blue"), 0.0, 1.0, FALSE }
#define CPN_RGBA_A { "A", N_("alpha"), 0.0, 1.0, TRUE }
#define CPN_HSV_H { "hue", N_("hue"), 0.0, 1.0, TRUE }
#define CPN_HSV_S { "saturation", N_("saturation"), 0.0, 1.0, TRUE }
#define CPN_HSV_V { "value", N_("value"), 0.0, 1.0, TRUE }
#define CPN_HSL_H { "hue", N_("hue"), 0.0, 1.0, TRUE }
#define CPN_HSL_S { "saturation", N_("saturation"), 0.0, 1.0, TRUE }
#define CPN_HSL_L { "lightness", N_("lightness"), 0.0, 1.0, TRUE }
#define CPN_CMYK_C { "Cyan", N_("cyan"), 0.0, 1.0, TRUE }
#define CPN_CMYK_M { "Magenta", N_("magenta"), 0.0, 1.0, TRUE }
#define CPN_CMYK_Y { "Yellow", N_("yellow"), 0.0, 1.0, TRUE }
#define CPN_CMYK_K { "Key", N_("black"), 0.0, 1.0, TRUE }
#define CPN_LAB_L { "CIE L", N_("L"), 0.0, 100.0, TRUE }
#define CPN_LAB_A { "CIE a", N_("A"), -127.5, 127.5, TRUE }
#define CPN_LAB_B { "CIE b", N_("B"), -127.5, 127.5, TRUE }
#define CPN_LCH_L { "CIE L", N_("L"), 0.0, 100.0, TRUE }
#define CPN_LCH_C { "CIE C(ab)", N_("C"), 0.0, 200.0, TRUE }
#define CPN_LCH_H { "CIE H(ab)", N_("H"), 0.0, 360.0, TRUE }
#define CPN_YCBCR_Y { "Y'", N_("luma-y470"), 0.0, 1.0, TRUE }
#define CPN_YCBCR_CB { "Cb", N_("blueness-cb470"), -0.5, 0.5, TRUE }
#define CPN_YCBCR_CR { "Cr", N_("redness-cr470"), -0.5, 0.5, TRUE }
#define CPN_YCBCR709_Y { "Y'", N_("luma-y709"), 0.0, 1.0, TRUE }
#define CPN_YCBCR709_CB { "Cb", N_("blueness-cb709"), -0.5, 0.5, TRUE }
#define CPN_YCBCR709_CR { "Cr", N_("redness-cr709"), -0.5, 0.5, TRUE }
static const Extract extract[] =
{
{ N_("RGB"), "RGB", TRUE, 3, FALSE, { CPN_RGBA_R, CPN_RGBA_G, CPN_RGBA_B } },
{ N_("RGBA"), "RGBA", TRUE, 4, FALSE, { CPN_RGBA_R, CPN_RGBA_G, CPN_RGBA_B, CPN_RGBA_A } },
{ N_("Red"), "RGB", FALSE, 1, FALSE, { CPN_RGBA_R } },
{ N_("Green"), "RGB", FALSE, 1, FALSE, { CPN_RGBA_G } },
{ N_("Blue"), "RGB", FALSE, 1, FALSE, { CPN_RGBA_B } },
{ N_("Alpha"), "RGBA", TRUE , 1, FALSE, { CPN_RGBA_A } },
{ N_("HSV"), "HSV", TRUE, 3, FALSE, { CPN_HSV_H, CPN_HSV_S, CPN_HSV_V } },
{ N_("Hue"), "HSV", FALSE, 1, FALSE, { CPN_HSV_H } },
{ N_("Saturation"), "HSV", FALSE, 1, FALSE, { CPN_HSV_S } },
{ N_("Value"), "HSV", FALSE, 1, FALSE, { CPN_HSV_V } },
{ N_("HSL"), "HSL", TRUE, 3, FALSE, { CPN_HSL_H, CPN_HSL_S, CPN_HSL_L } },
{ N_("Hue (HSL)"), "HSL", FALSE, 1, FALSE, { CPN_HSL_H } },
{ N_("Saturation (HSL)"), "HSL", FALSE, 1, FALSE, { CPN_HSL_S } },
{ N_("Lightness"), "HSL", FALSE, 1, FALSE, { CPN_HSL_L } },
{ N_("CMYK"), "CMYK", TRUE, 4, FALSE, { CPN_CMYK_C, CPN_CMYK_M, CPN_CMYK_Y, CPN_CMYK_K } },
{ N_("Cyan"), "CMYK", FALSE, 1, FALSE, { CPN_CMYK_C } },
{ N_("Magenta"), "CMYK", FALSE, 1, FALSE, { CPN_CMYK_M } },
{ N_("Yellow"), "CMYK", FALSE, 1, FALSE, { CPN_CMYK_Y } },
{ N_("Black"), "CMYK", FALSE, 1, FALSE, { CPN_CMYK_K } },
{ N_("LAB"), "CIE Lab", TRUE, 3, FALSE, { CPN_LAB_L, CPN_LAB_A, CPN_LAB_B } },
{ N_("LCH"), "CIE LCH(ab)", TRUE, 3, FALSE, { CPN_LCH_L, CPN_LCH_C, CPN_LCH_H } },
{ N_("YCbCr470"), "Y'CbCr", TRUE, 3, FALSE, { CPN_YCBCR_Y, CPN_YCBCR_CB, CPN_YCBCR_CR} },
{ N_("YCbCr470f"), "Y'CbCr", TRUE, 3, TRUE, { CPN_YCBCR_Y, CPN_YCBCR_CB, CPN_YCBCR_CR} },
{ N_("YCbCr709"), "Y'CbCr709", TRUE, 3, FALSE, { CPN_YCBCR709_Y, CPN_YCBCR709_CB, CPN_YCBCR709_CR} },
{ N_("YCbCr709f"), "Y'CbCr709", TRUE, 3, TRUE, { CPN_YCBCR709_Y, CPN_YCBCR709_CB, CPN_YCBCR709_CR} }
};
static void
decompose_class_init (DecomposeClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = decompose_query_procedures;
plug_in_class->create_procedure = decompose_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
decompose_init (Decompose *decompose)
{
}
static GList *
decompose_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
}
static GimpProcedure *
decompose_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, PLUG_IN_PROC))
{
GString *type_desc;
gint 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, '"');
}
procedure = gimp_image_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
decompose_run, NULL, NULL);
gimp_procedure_set_image_types (procedure, "RGB*");
gimp_procedure_set_sensitivity_mask (procedure,
GIMP_PROCEDURE_SENSITIVE_DRAWABLE);
gimp_procedure_set_menu_label (procedure, _("_Decompose..."));
gimp_procedure_add_menu_path (procedure, "<Image>/Colors/Components");
gimp_procedure_set_documentation (procedure,
_("Decompose an image into separate "
"colorspace components"),
"This function creates new gray images "
"with different channel information "
"in each of them",
name);
gimp_procedure_set_attribution (procedure,
"Peter Kirchgessner",
"Peter Kirchgessner, Clarence Risher",
"1997");
gimp_procedure_add_choice_argument (procedure, "decompose-type",
_("Color _model"),
_("The model to decompose to"),
gimp_choice_new_with_values ("rgb", 0, _("RGB"), NULL,
"rgba", 1, _("RGBA"), NULL,
"alpha", 2, _("Alpha"), NULL,
"hsv", 3, _("HSV"), NULL,
"hsl", 4, _("HSL"), NULL,
"cmyk", 5, _("CMYK"), NULL,
"lab", 6, _("LAB"), NULL,
"lch", 7, _("LCH"), NULL,
"ycbcr470", 8, _("YCbCr ITU R470"), NULL,
"ycbcr709", 9, _("YCbCr ITU R709"), NULL,
"ycbcr470f", 10, _("YCbCr ITU R470 256"), NULL,
"ycbcr709f", 11, _("YCbCr ITU R709 256"), NULL,
NULL),
"rgb",
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "layers-mode",
_("_Decompose to layers"),
_("Create channels as layers in a single image"),
TRUE,
G_PARAM_READWRITE);
gimp_procedure_add_boolean_argument (procedure, "use-registration",
_("_Foreground as registration color"),
_("When enabled, 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."),
FALSE,
G_PARAM_READWRITE);
gimp_procedure_add_image_return_value (procedure, "new-image-1",
"New image 1",
"Output gray image 1",
FALSE,
G_PARAM_READWRITE);
gimp_procedure_add_image_return_value (procedure, "new-image-2",
"New image 2",
"Output gray image 2 (N/A for single channel extract)",
TRUE,
G_PARAM_READWRITE);
gimp_procedure_add_image_return_value (procedure, "new-image-3",
"New image 3",
"Output gray image 3 (N/A for single channel extract)",
TRUE,
G_PARAM_READWRITE);
gimp_procedure_add_image_return_value (procedure, "new-image-4",
"New image 4",
"Output gray image 4 (N/A for single channel extract)",
TRUE,
G_PARAM_READWRITE);
g_string_free (type_desc, TRUE);
}
return procedure;
}
static GimpValueArray *
decompose_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable **drawables,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpDrawable *drawable;
gint num_images;
GimpImage *image_extract[MAX_EXTRACT_IMAGES];
GimpLayer *layer_extract[MAX_EXTRACT_IMAGES];
gint num_layers;
GString *data;
gchar *decompose_type;
gint j;
gegl_init (NULL, NULL);
if (gimp_core_object_array_get_length ((GObject **) drawables) != 1)
{
GError *error = NULL;
g_set_error (&error, GIMP_PLUG_IN_ERROR, 0,
_("Procedure '%s' only works with one drawable."),
PLUG_IN_PROC);
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CALLING_ERROR,
error);
}
else
{
drawable = drawables[0];
}
if (run_mode == GIMP_RUN_INTERACTIVE && ! decompose_dialog (procedure, G_OBJECT (config)))
return gimp_procedure_new_return_values (procedure, GIMP_PDB_CANCEL, NULL);
gimp_progress_init (_("Decomposing"));
num_images = decompose (image,
drawable,
G_OBJECT (config),
image_extract,
&num_layers,
layer_extract);
if (num_images <= 0)
return gimp_procedure_new_return_values (procedure, GIMP_PDB_EXECUTION_ERROR, NULL);
/* create decompose-data parasite */
data = g_string_new ("");
g_object_get (config,
"decompose-type", &decompose_type,
NULL);
g_string_printf (data, "source=%d type=%s ",
gimp_item_get_id (GIMP_ITEM (drawable)),
decompose_type);
g_free (decompose_type);
for (j = 0; j < num_layers; j++)
g_string_append_printf (data, "%d ",
gimp_item_get_id (GIMP_ITEM (layer_extract[j])));
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
for (j = 0; j < num_images; j++)
{
GimpParasite *parasite;
GIMP_VALUES_SET_IMAGE (return_vals, j + 1, image_extract[j]);
gimp_image_undo_enable (image_extract[j]);
gimp_image_clean_all (image_extract[j]);
parasite = gimp_parasite_new ("decompose-data",
0, data->len + 1, data->str);
gimp_image_attach_parasite (image_extract[j], parasite);
gimp_parasite_free (parasite);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_display_new (image_extract[j]);
}
gimp_progress_end ();
return return_vals;
}
/* Decompose an image. It returns the number of new (gray) images.
* The image IDs for the new images are returned in image_dst.
* On failure, -1 is returned.
*/
static gint
decompose (GimpImage *image,
GimpDrawable *drawable,
GObject *config,
GimpImage **image_dst,
gint *nlayers,
GimpLayer **layer_dst)
{
const gchar *layername;
gint j, extract_idx;
gint height, width;
gint num_layers;
GeglBuffer *src_buffer;
GeglBuffer *dst_buffer[MAX_EXTRACT_IMAGES];
GimpPrecision precision;
gboolean requirements = FALSE;
gboolean decomp_has_alpha = FALSE;
gchar *config_extract_type;
gboolean config_as_layers;
gboolean config_use_registration;
g_object_get (config,
"decompose-type", &config_extract_type,
"layers-mode", &config_as_layers,
"use-registration", &config_use_registration,
NULL);
extract_idx = -1; /* Search extract type */
for (j = 0; j < G_N_ELEMENTS (extract); j++)
{
if (g_ascii_strcasecmp (config_extract_type, extract[j].type) == 0)
{
extract_idx = j;
break;
}
}
if (extract_idx < 0)
return -1;
num_layers = extract[extract_idx].num_images;
/* Sanity checks */
src_buffer = gimp_drawable_get_buffer (drawable);
precision = gimp_image_get_precision (image);
for (j = 0; j < num_layers; j++)
{
/* FIXME: Not 100% reliable */
decomp_has_alpha |= ! g_strcmp0 ("alpha",
extract[extract_idx].component[j].babl_name);
decomp_has_alpha |= ! g_strcmp0 ("A",
extract[extract_idx].component[j].babl_name);
}
requirements |= (gimp_drawable_is_rgb (drawable));
requirements |= (gimp_drawable_is_indexed (drawable));
requirements |= (gimp_drawable_is_gray (drawable)
&& gimp_drawable_has_alpha (drawable)
&& (num_layers <= 2)
&& decomp_has_alpha);
requirements &= (!decomp_has_alpha || gimp_drawable_has_alpha (drawable));
if (!requirements)
{
g_message (_("Image not suitable for this decomposition"));
return -1;
}
width = gegl_buffer_get_width (src_buffer);
height = gegl_buffer_get_height (src_buffer);
/* Create all new gray images */
for (j = 0; j < num_layers; j++)
{
gchar *filename;
gdouble xres, yres;
filename = generate_filename (image, config, extract_idx, j);
gimp_image_get_resolution (image, &xres, &yres);
if (config_as_layers)
{
layername = gettext (extract[extract_idx].component[j].channel_name);
if (j == 0)
image_dst[j] = create_new_image (g_file_new_for_path (filename),
layername,
width, height, GIMP_GRAY, precision,
xres, yres,
layer_dst + j);
else
layer_dst[j] = create_new_layer (image_dst[0], j, layername,
width, height, GIMP_GRAY);
}
else
{
image_dst[j] = create_new_image (g_file_new_for_path (filename),
NULL,
width, height, GIMP_GRAY, precision,
xres, yres,
layer_dst + j);
}
g_free (filename);
dst_buffer[j] = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer_dst[j]));
}
copy_n_components (src_buffer, dst_buffer,
extract[extract_idx]);
if (config_use_registration)
transfer_registration_color (src_buffer, dst_buffer, num_layers);
gimp_progress_update (1.0);
g_object_unref (src_buffer);
for (j = 0; j < num_layers; j++)
{
g_object_unref (dst_buffer[j]);
}
*nlayers = num_layers;
return (config_as_layers ? 1 : num_layers);
}
/* Create an image. Returns layer and image */
static GimpImage *
create_new_image (GFile *file,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type,
GimpPrecision precision,
gdouble xres,
gdouble yres,
GimpLayer **layer)
{
GimpImage *image;
image = gimp_image_new_with_precision (width, height, type, precision);
gimp_image_undo_disable (image);
gimp_image_set_file (image, file);
gimp_image_set_resolution (image, xres, yres);
*layer = create_new_layer (image, 0,
layername, width, height, type);
return image;
}
static GimpLayer *
create_new_layer (GimpImage *image,
gint position,
const gchar *layername,
guint width,
guint height,
GimpImageBaseType type)
{
GimpLayer *layer;
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 = gimp_layer_new (image, layername, width, height,
gdtype,
100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, layer, NULL, position);
return layer;
}
/* Registration Color function */
static void
transfer_registration_color (GeglBuffer *src,
GeglBuffer **dst,
gint count)
{
GeglColor *color;
GeglBufferIterator *gi;
const Babl *src_format;
const Babl *dst_format;
gint src_bpp;
gint dst_bpp;
gint i;
gdouble white;
color = gimp_context_get_foreground ();
white = 1.0;
src_format = gegl_buffer_get_format (src);
src_bpp = babl_format_get_bytes_per_pixel (src_format);
dst_format = gegl_buffer_get_format (dst[0]);
dst_bpp = babl_format_get_bytes_per_pixel (dst_format);
gi = gegl_buffer_iterator_new (src, NULL, 0, NULL,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 10);
for (i = 0; i < count; i++)
{
gegl_buffer_iterator_add (gi, dst[i], NULL, 0, NULL,
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
}
while (gegl_buffer_iterator_next (gi))
{
gpointer src_data;
gpointer dst_data[MAX_EXTRACT_IMAGES];
gint j, k;
src_data = gi->items[0].data;
for (j = 0; j < count; j++)
dst_data[j] = gi->items[j + 1].data;
for (k = 0; k < gi->length; k++)
{
GeglColor *test;
gulong pos = k * src_bpp;
test = gegl_color_new (NULL);
gegl_color_set_pixel (test, src_format, ((guchar *)src_data) + pos);
if (gimp_color_is_perceptually_identical (test, color))
{
for (j = 0; j < count; j++)
{
gpointer data = dst_data[j];
babl_process (babl_fish (babl_format ("Y double"), dst_format),
&white, (guchar *)data + (k * dst_bpp), 1);
}
}
g_object_unref (test);
}
}
g_object_unref (color);
}
static void
cpn_affine_transform_clamp (GeglBuffer *buffer,
gdouble min,
gdouble max,
gboolean clamp)
{
GeglBufferIterator *gi;
gdouble scale = 1.0 / (max - min);
gdouble offset = - min;
/* We want to scale values linearly, regardless of the format of the buffer */
gegl_buffer_set_format (buffer, babl_format ("Y double"));
gi = gegl_buffer_iterator_new (buffer, NULL, 0, NULL,
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE, 1);
while (gegl_buffer_iterator_next (gi))
{
guint k;
double *data;
data = (double*) gi->items[0].data;
if (clamp)
{
for (k = 0; k < gi->length; k++)
{
data[k] = CLAMP ((data[k] + offset) * scale, 0.0, 1.0);
}
}
else
{
for (k = 0; k < gi->length; k++)
{
data[k] = (data[k] + offset) * scale;
}
}
}
}
static void
copy_n_components (GeglBuffer *src,
GeglBuffer **dst,
Extract ext)
{
gint i;
for (i = 0; i < ext.num_images; i++)
{
gimp_progress_update ((gdouble) i / (gdouble) ext.num_images);
copy_one_component (src, dst[i], ext.model, ext.component[i], ext.clamp);
}
}
static void
copy_one_component (GeglBuffer *src,
GeglBuffer *dst,
const gchar *model,
const Component component,
gboolean clamp)
{
const Babl *component_format;
const Babl *dst_format;
GeglBuffer *temp;
const GeglRectangle *extent;
/* We are working in linear double precision */
component_format = babl_format_new (babl_model (model),
babl_type ("double"),
babl_component (component.babl_name),
NULL);
/* We need to enforce linearity here
* If the output is "Y'", the output of temp is already ok
* If the output is "Y" , it will enforce gamma-decoding.
* A bit tricky and suboptimal...
*/
if (component.perceptual_channel)
dst_format = babl_format ("Y' double");
else
dst_format = babl_format ("Y double");
extent = gegl_buffer_get_extent (src);
temp = gegl_buffer_new (extent, dst_format);
/* we want to copy the component as is */
gegl_buffer_set_format (temp, component_format);
gegl_buffer_copy (src, NULL, GEGL_ABYSS_NONE, temp, NULL);
if (component.range_min != 0.0 ||
component.range_max != 1.0 ||
clamp)
{
cpn_affine_transform_clamp (temp,
component.range_min, component.range_max,
clamp);
}
/* This is our new "Y(') double" component buffer */
gegl_buffer_set_format (temp, NULL);
/* Now we let babl convert it back to the format that dst needs */
gegl_buffer_copy (temp, NULL, GEGL_ABYSS_NONE, dst, NULL);
g_object_unref (temp);
}
static gboolean
decompose_dialog (GimpProcedure *procedure,
GObject *config)
{
GtkWidget *dialog;
GtkWidget *vbox;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY);
dialog = gimp_procedure_dialog_new (procedure,
GIMP_PROCEDURE_CONFIG (config),
_("Decompose"));
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
gimp_procedure_dialog_get_label (GIMP_PROCEDURE_DIALOG (dialog),
"extract-label", _("Extract Channels"),
FALSE, FALSE);
gimp_procedure_dialog_fill_frame (GIMP_PROCEDURE_DIALOG (dialog),
"extract-frame",
"extract-label", FALSE,
"decompose-type");
vbox = gimp_procedure_dialog_fill_box (GIMP_PROCEDURE_DIALOG (dialog),
"decompose-vbox",
"extract-frame", "layers-mode",
"use-registration",
NULL);
gtk_box_set_spacing (GTK_BOX (vbox), 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gimp_procedure_dialog_fill (GIMP_PROCEDURE_DIALOG (dialog),
"decompose-vbox", NULL);
gtk_widget_set_visible (dialog, TRUE);
run = gimp_procedure_dialog_run (GIMP_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
/* Build a filename like <imagename>-<channel>.<extension> */
gchar *
generate_filename (GimpImage *image,
GObject *config,
guint colorspace,
guint channel)
{
/* Build a filename like <imagename>-<channel>.<extension> */
GFile *file;
gchar *fname = NULL;
gchar *filename;
gchar *extension;
gboolean config_as_layers;
g_object_get (config,
"layers-mode", &config_as_layers,
NULL);
file = gimp_image_get_file (image);
if (file)
fname = g_file_get_path (file);
if (fname)
{
extension = fname + strlen (fname) - 1;
while (extension >= fname)
{
if (*extension == '.')
break;
extension--;
}
if (extension >= fname)
{
*(extension++) = '\0';
}
if (config_as_layers)
filename = g_strdup_printf ("%s-%s.xcf", fname,
gettext (extract[colorspace].type));
else
filename = g_strdup_printf ("%s-%s.xcf", fname,
gettext (extract[colorspace].component[channel].channel_name));
}
else
{
if (config_as_layers)
filename = g_strdup_printf ("%s.xcf",
gettext (extract[colorspace].type));
else
filename = g_strdup_printf ("%s.xcf",
gettext (extract[colorspace].component[channel].channel_name));
}
g_free (fname);
return filename;
}
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