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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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/>.
*/
#include "config.h"
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-loops.h"
#include "gimp.h"
#include "gimpchannel.h"
#include "gimpcontainer.h"
#include "gimpdrawable.h"
#include "gimpimage.h"
#include "gimpimage-color-profile.h"
#include "gimpimage-new.h"
#include "gimpimage-pick-color.h"
#include "gimplayer.h"
#include "gimppickable.h"
gboolean
gimp_image_pick_color (GimpImage *image,
GList *drawables,
gint x,
gint y,
gboolean show_all,
gboolean sample_merged,
gboolean sample_average,
gdouble average_radius,
const Babl **sample_format,
gpointer pixel,
GeglColor **color)
{
GimpImage *pick_image = NULL;
GimpPickable *pickable;
GList *iter;
gboolean result;
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (color != NULL && GEGL_IS_COLOR (*color), FALSE);
for (iter = drawables; iter; iter = iter->next)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (iter->data), FALSE);
g_return_val_if_fail (gimp_item_get_image (iter->data) == image,
FALSE);
}
if (sample_merged && g_list_length (drawables) == 1)
{
if ((GIMP_IS_LAYER (drawables->data) &&
gimp_image_get_n_layers (image) == 1) ||
(GIMP_IS_CHANNEL (drawables->data) &&
gimp_image_get_n_channels (image) == 1))
{
/* Let's add a special exception when an image has only one
* layer. This was useful in particular for indexed image as
* it allows to pick the right index value even when "Sample
* merged" is checked. There are more possible exceptions, but
* we can't just take them all in considerations unless we
* want to make code extra-complicated).
* See #3041.
*/
sample_merged = FALSE;
}
}
if (sample_merged)
{
if (! show_all)
pickable = GIMP_PICKABLE (image);
else
pickable = GIMP_PICKABLE (gimp_image_get_projection (image));
}
else
{
gboolean free_drawables = FALSE;
if (! drawables)
{
drawables = gimp_image_get_selected_drawables (image);
free_drawables = TRUE;
}
if (! drawables)
return FALSE;
if (g_list_length (drawables) == 1)
{
gint off_x, off_y;
gimp_item_get_offset (GIMP_ITEM (drawables->data), &off_x, &off_y);
x -= off_x;
y -= off_y;
pickable = GIMP_PICKABLE (drawables->data);
}
else /* length > 1 */
{
pick_image = gimp_image_new_from_drawables (image->gimp, drawables, FALSE, FALSE);
gimp_container_remove (image->gimp->images, GIMP_OBJECT (pick_image));
if (! show_all)
pickable = GIMP_PICKABLE (pick_image);
else
pickable = GIMP_PICKABLE (gimp_image_get_projection (pick_image));
gimp_pickable_flush (pickable);
}
if (free_drawables)
g_list_free (drawables);
}
/* Do *not* call gimp_pickable_flush() here because it's too expensive
* to call it unconditionally each time e.g. the cursor view is updated.
* Instead, call gimp_pickable_flush() in the callers if needed.
*/
if (sample_format)
*sample_format = gimp_pickable_get_format (pickable);
result = gimp_pickable_pick_color (pickable, x, y,
sample_average &&
! (show_all && sample_merged),
average_radius,
pixel, color);
if (show_all && sample_merged)
{
GimpColorProfile *profile = gimp_image_get_color_profile (image);
const Babl *space = NULL;
gdouble sample[4] = {};
const Babl *format;
if (profile)
space = gimp_color_profile_get_space (profile,
GIMP_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC,
NULL);
format = babl_format_with_space ("RaGaBaA double", space);
if (! result)
memset (pixel, 0, babl_format_get_bytes_per_pixel (*sample_format));
if (sample_average)
{
GeglBuffer *buffer = gimp_pickable_get_buffer (pickable);
gint radius = floor (average_radius);
gimp_gegl_average_color (buffer,
GEGL_RECTANGLE (x - radius,
y - radius,
2 * radius + 1,
2 * radius + 1),
FALSE, GEGL_ABYSS_NONE, format, sample);
}
if (! result || sample_average)
gegl_color_set_pixel (*color, format, sample);
result = TRUE;
}
if (pick_image)
g_object_unref (pick_image);
return result;
}
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