gimp/plug-ins/common/gradient-map.c

483 lines
15 KiB
C
Raw Normal View History

/* GIMP - The GNU Image Manipulation Program
1997-11-25 06:05:25 +08:00
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Gradient Map plug-in
* Copyright (C) 1997 Eiichi Takamori <taka@ma1.seikyou.ne.jp>
*
* This program is free software: you can redistribute it and/or modify
1997-11-25 06:05:25 +08:00
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
1997-11-25 06:05:25 +08:00
* (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/>.
1997-11-25 06:05:25 +08:00
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include "libgimp/stdplugins-intl.h"
1997-11-25 06:05:25 +08:00
1997-11-25 06:05:25 +08:00
/* Some useful macros */
#define GRADMAP_PROC "plug-in-gradmap"
#define PALETTEMAP_PROC "plug-in-palettemap"
Renamed tons of plug-ins to make more sense and to be consistent: 2008-03-24 Michael Natterer <mitch@gimp.org> Renamed tons of plug-ins to make more sense and to be consistent: * plug-ins/common/AlienMap2.c -> alien-map.c * plug-ins/common/CEL.c -> cel.c * plug-ins/common/CML_explorer.c -> cml-explorer.c * plug-ins/common/align_layers.c -> align-layers.c * plug-ins/common/animationplay.c -> animation-play.c * plug-ins/common/animoptimize.c -> animation-optimize.c * plug-ins/common/apply_lens.c -> lens-apply.c * plug-ins/common/autocrop.c -> crop-auto.c * plug-ins/common/autostretch_hsv.c -> contrast-stretch-hsv.c * plug-ins/common/borderaverage.c -> border-average.c * plug-ins/common/bumpmap.c -> bump-map.c * plug-ins/common/c_astretch.c -> contrast-stretch.c * plug-ins/common/ccanalyze.c -> color-cube-analyze.c * plug-ins/common/channel_mixer.c -> channel-mixer.c * plug-ins/common/color_enhance.c -> color-enhance.c * plug-ins/common/colortoalpha.c -> color-to-alpha.c * plug-ins/common/convmatrix.c -> convolution-matrix.c * plug-ins/common/curve_bend.c -> curve-bend.c * plug-ins/common/depthmerge.c -> depth-merge.c * plug-ins/common/dog.c -> edge-dog.c * plug-ins/common/exchange.c -> color-exchange.c * plug-ins/common/flarefx.c -> lens-flare.c * plug-ins/common/fp.c -> filter-pack.c * plug-ins/common/fractaltrace.c -> fractal-trace.c * plug-ins/common/gauss.c -> blur-gauss.c * plug-ins/common/gee_zoom.c -> gee-zoom.c * plug-ins/common/glasstile.c -> tile-glass.c * plug-ins/common/gqbist.c -> qbist.c * plug-ins/common/gradmap.c -> gradient-map.c * plug-ins/common/laplace.c -> edge-laplace.c * plug-ins/common/lens.c -> lens-distortion.c * plug-ins/common/lic.c -> van-gogh-lic.c * plug-ins/common/max_rgb.c -> max-rgb.c * plug-ins/common/mblur.c -> blur-motion.c * plug-ins/common/nlfilt.c -> nl-filter.c * plug-ins/common/noisify.c -> noise-rgb.c * plug-ins/common/normalize.c -> contrast-normalize.c * plug-ins/common/papertile.c -> tile-paper.c * plug-ins/common/polar.c -> polar-coords.c * plug-ins/common/randomize.c -> noise-randomize.c * plug-ins/common/redeye.c -> red-eye-removal.c * plug-ins/common/retinex.c -> contrast-retinex.c * plug-ins/common/sample_colorize.c -> sample-colorize.c * plug-ins/common/scatter_hsv.c -> noise-hsv.c * plug-ins/common/sel_gauss.c -> blur-gauss-selective.c * plug-ins/common/semiflatten.c -> semi-flatten.c * plug-ins/common/smooth_palette.c -> smooth-palette.c * plug-ins/common/snoise.c -> noise-solid.c * plug-ins/common/sobel.c -> edge-sobel.c * plug-ins/common/spheredesigner.c -> sphere-designer.c * plug-ins/common/spread.c -> noise-spread.c * plug-ins/common/struc.c -> apply-canvas.c * plug-ins/common/threshold_alpha.c -> threshold-alpha.c * plug-ins/common/tileit.c -> tile-small.c * plug-ins/common/tiler.c -> tile-seamless.c * plug-ins/common/uniteditor.c -> unit-editor.c * plug-ins/common/unsharp.c -> unsharp-mask.c * plug-ins/common/vinvert.c -> value-invert.c * plug-ins/common/vpropagate.c -> value-propagate.c * plug-ins/common/webbrowser.c -> web-browser.c * plug-ins/common/whirlpinch.c -> whirl-pinch.c * plug-ins/common/zealouscrop.c -> crop-zealous.c * plug-ins/common/plugin-defs.pl: changed accordingly. * plug-ins/common/Makefile.am: regenerated. svn path=/trunk/; revision=25192
2008-03-24 23:29:55 +08:00
#define PLUG_IN_BINARY "gradient-map"
#define PLUG_IN_ROLE "gimp-gradient-map"
#define NSAMPLES 2048
typedef enum
{
GRADIENT_MODE = 1,
PALETTE_MODE
} MapMode;
2019-08-30 17:11:16 +08:00
typedef struct _Map Map;
typedef struct _MapClass MapClass;
struct _Map
{
GimpPlugIn parent_instance;
};
struct _MapClass
1997-11-25 06:05:25 +08:00
{
2019-08-30 17:11:16 +08:00
GimpPlugInClass parent_class;
1997-11-25 06:05:25 +08:00
};
2019-08-30 17:11:16 +08:00
#define MAP_TYPE (map_get_type ())
#define MAP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), MAP_TYPE, Map))
2019-08-30 17:11:16 +08:00
GType map_get_type (void) G_GNUC_CONST;
static GList * map_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * map_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * map_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GimpProcedureConfig *config,
2019-08-30 17:11:16 +08:00
gpointer run_data);
static void map (GeglBuffer *buffer,
GeglBuffer *shadow_buffer,
GimpDrawable *drawable,
MapMode mode);
static gdouble * get_samples_gradient (GimpDrawable *drawable);
static gdouble * get_samples_palette (GimpDrawable *drawable);
G_DEFINE_TYPE (Map, map, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (MAP_TYPE)
DEFINE_STD_SET_I18N
2019-08-30 17:11:16 +08:00
1997-11-25 06:05:25 +08:00
static void
2019-08-30 17:11:16 +08:00
map_class_init (MapClass *klass)
1997-11-25 06:05:25 +08:00
{
2019-08-30 17:11:16 +08:00
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = map_query_procedures;
plug_in_class->create_procedure = map_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
1997-11-25 06:05:25 +08:00
}
static void
2019-08-30 17:11:16 +08:00
map_init (Map *map)
1997-11-25 06:05:25 +08:00
{
2019-08-30 17:11:16 +08:00
}
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
static GList *
map_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
list = g_list_append (list, g_strdup (GRADMAP_PROC));
list = g_list_append (list, g_strdup (PALETTEMAP_PROC));
return list;
}
2019-08-30 17:11:16 +08:00
static GimpProcedure *
map_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, GRADMAP_PROC))
{
procedure = gimp_image_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
map_run,
GINT_TO_POINTER (GRADIENT_MODE),
NULL);
2019-08-30 17:11:16 +08:00
gimp_procedure_set_image_types (procedure, "RGB*, GRAY*");
gimp_procedure_set_sensitivity_mask (procedure,
GIMP_PROCEDURE_SENSITIVE_DRAWABLE);
2019-08-30 17:11:16 +08:00
gimp_procedure_set_menu_label (procedure, _("_Gradient Map"));
2019-08-30 17:11:16 +08:00
gimp_procedure_add_menu_path (procedure, "<Image>/Colors/Map");
gimp_procedure_set_documentation (procedure,
_("Recolor the image using colors "
"from the active gradient"),
2019-08-30 17:11:16 +08:00
"This plug-in maps the contents of "
"the specified drawable with active "
"gradient. It calculates luminosity "
"of each pixel and replaces the pixel "
"by the sample of active gradient at "
"the position proportional to that "
"luminosity. Complete black pixel "
"becomes the leftmost color of the "
"gradient, and complete white becomes "
"the rightmost. Works on both "
"Grayscale and RGB image "
"with/without alpha channel.",
name);
gimp_procedure_set_attribution (procedure,
"Eiichi Takamori",
"Eiichi Takamori",
"1997");
}
else if (! strcmp (name, PALETTEMAP_PROC))
{
procedure = gimp_image_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
map_run,
GINT_TO_POINTER (PALETTE_MODE),
NULL);
2019-08-30 17:11:16 +08:00
gimp_procedure_set_image_types (procedure, "RGB*, GRAY*");
gimp_procedure_set_sensitivity_mask (procedure,
GIMP_PROCEDURE_SENSITIVE_DRAWABLE);
2019-08-30 17:11:16 +08:00
gimp_procedure_set_menu_label (procedure, _("_Palette Map"));
2019-08-30 17:11:16 +08:00
gimp_procedure_add_menu_path (procedure, "<Image>/Colors/Map");
gimp_procedure_set_documentation (procedure,
_("Recolor the image using colors "
"from the active palette"),
2019-08-30 17:11:16 +08:00
"This plug-in maps the contents of "
"the specified drawable with the "
"active palette. It calculates "
"luminosity of each pixel and "
"replaces the pixel by the palette "
"sample at the corresponding index. "
"A complete black pixel becomes the "
"lowest palette entry, and complete "
"white becomes the highest. Works on "
"both Grayscale and RGB image "
"with/without alpha channel.",
name);
gimp_procedure_set_attribution (procedure,
"Bill Skaggs",
"Bill Skaggs",
"2004");
}
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
return procedure;
}
static GimpValueArray *
map_run (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GimpProcedureConfig *config,
gpointer run_data)
2019-08-30 17:11:16 +08:00
{
MapMode mode = GPOINTER_TO_INT (run_data);
GeglBuffer *shadow_buffer;
GeglBuffer *buffer;
GimpDrawable *drawable;
2019-08-30 17:11:16 +08:00
gegl_init (NULL, NULL);
1997-11-25 06:05:25 +08:00
if (n_drawables != 1)
{
GError *error = NULL;
g_set_error (&error, GIMP_PLUG_IN_ERROR, 0,
_("Procedure '%s' only works with one drawable."),
gimp_procedure_get_name (procedure));
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CALLING_ERROR,
error);
}
else
{
drawable = drawables[0];
}
2019-08-30 17:11:16 +08:00
shadow_buffer = gimp_drawable_get_shadow_buffer (drawable);
buffer = gimp_drawable_get_buffer (drawable);
1997-11-25 06:05:25 +08:00
/* Make sure that the drawable is gray or RGB color */
2019-08-30 17:11:16 +08:00
if (gimp_drawable_is_rgb (drawable) ||
gimp_drawable_is_gray (drawable))
{
2019-08-30 17:11:16 +08:00
if (mode == GRADIENT_MODE)
{
gimp_progress_init (_("Gradient Map"));
}
else
{
2019-08-30 17:11:16 +08:00
gimp_progress_init (_("Palette Map"));
}
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
map (buffer, shadow_buffer, drawable, mode);
}
else
{
2019-08-30 17:11:16 +08:00
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
NULL);
}
1997-11-25 06:05:25 +08:00
g_object_unref (buffer);
g_object_unref (shadow_buffer);
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
gimp_drawable_merge_shadow (drawable, TRUE);
1997-11-25 06:05:25 +08:00
2019-08-30 17:11:16 +08:00
gimp_drawable_update (drawable, 0, 0,
gimp_drawable_get_width (drawable),
gimp_drawable_get_height (drawable));
1997-11-25 06:05:25 +08:00
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
2019-08-30 17:11:16 +08:00
return gimp_procedure_new_return_values (procedure, GIMP_PDB_SUCCESS, NULL);
}
static void
map (GeglBuffer *buffer,
GeglBuffer *shadow_buffer,
2019-08-30 17:11:16 +08:00
GimpDrawable *drawable,
MapMode mode)
{
GeglBufferIterator *gi;
gint nb_color_chan;
gint nb_chan;
gint nb_chan2;
gint nb_chan_samp;
gint index_iter;
gboolean interpolate;
gdouble *samples;
gboolean is_rgb;
gboolean has_alpha;
const Babl *format_shadow;
const Babl *format_buffer;
2019-08-30 17:11:16 +08:00
is_rgb = gimp_drawable_is_rgb (drawable);
has_alpha = gimp_drawable_has_alpha (drawable);
1997-11-25 06:05:25 +08:00
switch (mode)
{
case GRADIENT_MODE:
2019-08-30 17:11:16 +08:00
samples = get_samples_gradient (drawable);
interpolate = TRUE;
break;
case PALETTE_MODE:
2019-08-30 17:11:16 +08:00
samples = get_samples_palette (drawable);
interpolate = FALSE;
break;
default:
g_error ("plug_in_gradmap: invalid mode");
}
if (is_rgb)
{
nb_color_chan = 3;
nb_chan_samp = 4;
if (has_alpha)
format_shadow = babl_format ("R'G'B'A float");
else
format_shadow = babl_format ("R'G'B' float");
}
else
{
nb_color_chan = 1;
nb_chan_samp = 2;
if (has_alpha)
format_shadow = babl_format ("Y'A float");
else
format_shadow = babl_format ("Y' float");
}
if (has_alpha)
{
nb_chan = nb_color_chan + 1;
nb_chan2 = 2;
format_buffer = babl_format ("Y'A float");
}
else
{
nb_chan = nb_color_chan;
nb_chan2 = 1;
format_buffer = babl_format ("Y' float");
}
gi = gegl_buffer_iterator_new (shadow_buffer, NULL, 0, format_shadow,
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE, 2);
index_iter = gegl_buffer_iterator_add (gi, buffer, NULL,
0, format_buffer,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (gi))
{
guint k;
gfloat *data;
gfloat *data2;
data = (gfloat*) gi->items[0].data;
data2 = (gfloat*) gi->items[index_iter].data;
if (interpolate)
{
for (k = 0; k < gi->length; k++)
{
gint b, ind1, ind2;
gdouble *samp1, *samp2;
gfloat c1, c2, val;
val = data2[0] * (NSAMPLES-1);
ind1 = CLAMP (floor (val), 0, NSAMPLES-1);
ind2 = CLAMP (ceil (val), 0, NSAMPLES-1);
c1 = 1.0 - (val - ind1);
c2 = 1.0 - c1;
samp1 = &(samples[ind1 * nb_chan_samp]);
samp2 = &(samples[ind2 * nb_chan_samp]);
for (b = 0; b < nb_color_chan; b++)
data[b] = (samp1[b] * c1 + samp2[b] * c2);
if (has_alpha)
{
float alpha = (samp1[b] * c1 + samp2[b] * c2);
data[b] = alpha * data2[1];
}
data += nb_chan;
data2 += nb_chan2;
}
}
else
{
for (k = 0; k < gi->length; k++)
{
gint b, ind;
gdouble *samp;
ind = CLAMP (data2[0] * (NSAMPLES-1), 0, NSAMPLES-1);
samp = &(samples[ind * nb_chan_samp]);
for (b = 0; b < nb_color_chan; b++)
data[b] = samp[b];
if (has_alpha)
{
data[b] = samp[b] * data2[1];
}
data += nb_chan;
data2 += nb_chan2;
}
}
}
g_free (samples);
1997-11-25 06:05:25 +08:00
}
/*
Returns 2048 samples of the gradient.
Each sample is (R'G'B'A float) or (Y'A float), depending on the drawable
1997-11-25 06:05:25 +08:00
*/
static gdouble *
2019-08-30 17:11:16 +08:00
get_samples_gradient (GimpDrawable *drawable)
1997-11-25 06:05:25 +08:00
{
2022-09-06 07:28:35 +08:00
GimpGradient *gradient;
gint n_d_samples;
gdouble *d_samples = NULL;
1997-11-25 06:05:25 +08:00
2022-09-06 07:28:35 +08:00
gradient = gimp_context_get_gradient ();
/* FIXME: "reverse" hardcoded to FALSE. */
2022-09-06 07:28:35 +08:00
gimp_gradient_get_uniform_samples (gradient, NSAMPLES, FALSE,
&n_d_samples, &d_samples);
2019-08-30 17:11:16 +08:00
if (! gimp_drawable_is_rgb (drawable))
1997-11-25 06:05:25 +08:00
{
const Babl *format_src = babl_format ("R'G'B'A double");
const Babl *format_dst = babl_format ("Y'A double");
const Babl *fish = babl_fish (format_src, format_dst);
2019-08-30 17:11:16 +08:00
babl_process (fish, d_samples, d_samples, NSAMPLES);
1997-11-25 06:05:25 +08:00
}
return d_samples;
}
/*
Returns 2048 samples of the palette.
Each sample is (R'G'B'A float) or (Y'A float), depending on the drawable
*/
static gdouble *
2019-08-30 17:11:16 +08:00
get_samples_palette (GimpDrawable *drawable)
{
GimpPalette *palette;
gdouble *d_samples, *d_samp;
gboolean is_rgb;
gdouble factor;
gint pal_entry, num_colors;
gint nb_color_chan, nb_chan, i;
const Babl *format;
palette = gimp_context_get_palette ();
num_colors = gimp_palette_get_color_count (palette);
2019-08-30 17:11:16 +08:00
is_rgb = gimp_drawable_is_rgb (drawable);
factor = ((double) num_colors) / NSAMPLES;
format = is_rgb ? babl_format ("R'G'B'A double") : babl_format ("Y'A double");
nb_color_chan = is_rgb ? 3 : 1;
nb_chan = nb_color_chan + 1;
d_samples = g_new (gdouble, NSAMPLES * nb_chan);
for (i = 0; i < NSAMPLES; i++)
{
GeglColor *color_sample;
d_samp = &d_samples[i * nb_chan];
pal_entry = CLAMP ((int)(i * factor), 0, num_colors - 1);
color_sample = gimp_palette_entry_get_color (palette, pal_entry);
gegl_color_get_pixel (color_sample, format, d_samp);
}
return d_samples;
1997-11-25 06:05:25 +08:00
}