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PIKApp/app/core/pikaimage-convert-precision.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikaimage-convert-precision.c
* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
*
* 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 "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "core-types.h"
#include "gegl/pika-babl.h"
#include "gegl/pika-gegl-loops.h"
#include "pikachannel.h"
#include "pikadrawable.h"
#include "pikadrawable-operation.h"
#include "pikaimage.h"
#include "pikaimage-color-profile.h"
#include "pikaimage-convert-precision.h"
#include "pikaimage-undo.h"
#include "pikaimage-undo-push.h"
#include "pikaobjectqueue.h"
#include "pikaprogress.h"
#include "text/pikatextlayer.h"
#include "pika-intl.h"
void
pika_image_convert_precision (PikaImage *image,
PikaPrecision precision,
GeglDitherMethod layer_dither_type,
GeglDitherMethod text_layer_dither_type,
GeglDitherMethod mask_dither_type,
PikaProgress *progress)
{
PikaColorProfile *old_profile;
PikaColorProfile *new_profile = NULL;
const Babl *old_format;
const Babl *new_format;
PikaObjectQueue *queue;
PikaProgress *sub_progress;
GList *layers;
PikaDrawable *drawable;
const gchar *enum_desc;
gchar *undo_desc = NULL;
g_return_if_fail (PIKA_IS_IMAGE (image));
g_return_if_fail (precision != pika_image_get_precision (image));
g_return_if_fail (pika_babl_is_valid (pika_image_get_base_type (image),
precision));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
pika_enum_get_value (PIKA_TYPE_PRECISION, precision,
NULL, NULL, &enum_desc, NULL);
undo_desc = g_strdup_printf (C_("undo-type", "Convert Image to %s"),
enum_desc);
if (progress)
pika_progress_start (progress, FALSE, "%s", undo_desc);
queue = pika_object_queue_new (progress);
sub_progress = PIKA_PROGRESS (queue);
layers = pika_image_get_layer_list (image);
pika_object_queue_push_list (queue, layers);
g_list_free (layers);
pika_object_queue_push (queue, pika_image_get_mask (image));
pika_object_queue_push_container (queue, pika_image_get_channels (image));
g_object_freeze_notify (G_OBJECT (image));
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_IMAGE_CONVERT,
undo_desc);
g_free (undo_desc);
/* Push the image precision to the stack */
pika_image_undo_push_image_precision (image, NULL);
old_profile = pika_color_managed_get_color_profile (PIKA_COLOR_MANAGED (image));
old_format = pika_image_get_layer_format (image, FALSE);
pika_image_set_converting (image, TRUE);
/* Set the new precision */
g_object_set (image, "precision", precision, NULL);
new_format = pika_image_get_layer_format (image, FALSE);
/* we use old_format and new_format just for looking at their
* TRCs, new_format's space might be incorrect, don't use it
* for anything else.
*/
if (pika_babl_format_get_trc (old_format) !=
pika_babl_format_get_trc (new_format))
{
PikaImageBaseType base_type = pika_image_get_base_type (image);
PikaTRCType new_trc = pika_babl_trc (precision);
/* if the image doesn't use the builtin profile, create a new
* one, using the original profile's chromacities and
* whitepoint, but a linear/sRGB-gamma TRC.
*/
if (pika_image_get_color_profile (image))
{
if (new_trc == PIKA_TRC_LINEAR)
{
new_profile =
pika_color_profile_new_linear_from_color_profile (old_profile);
}
else
{
new_profile =
pika_color_profile_new_srgb_trc_from_color_profile (old_profile);
}
}
/* we always need a profile for convert_type with changing TRC
* on the same image, use the new precision's builtin profile if
* the profile couldn't be converted or the image used the old
* TRC's builtin profile.
*/
if (! new_profile)
{
new_profile = pika_babl_get_builtin_color_profile (base_type,
new_trc);
g_object_ref (new_profile);
}
}
while ((drawable = pika_object_queue_pop (queue)))
{
if (drawable == PIKA_DRAWABLE (pika_image_get_mask (image)))
{
GeglBuffer *buffer;
pika_image_undo_push_mask_precision (image, NULL,
PIKA_CHANNEL (drawable));
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
pika_image_get_width (image),
pika_image_get_height (image)),
pika_image_get_mask_format (image));
pika_gegl_buffer_copy (pika_drawable_get_buffer (drawable), NULL,
GEGL_ABYSS_NONE,
buffer, NULL);
pika_drawable_set_buffer (drawable, FALSE, NULL, buffer);
g_object_unref (buffer);
pika_progress_set_value (sub_progress, 1.0);
}
else
{
GeglDitherMethod dither_type;
if (pika_item_is_text_layer (PIKA_ITEM (drawable)))
dither_type = text_layer_dither_type;
else
dither_type = layer_dither_type;
pika_drawable_convert_type (drawable, image,
pika_drawable_get_base_type (drawable),
precision,
pika_drawable_has_alpha (drawable),
old_profile,
new_profile,
dither_type,
mask_dither_type,
TRUE, sub_progress);
}
}
if (new_profile)
{
pika_image_set_color_profile (image, new_profile, NULL);
g_object_unref (new_profile);
}
else
{
pika_color_managed_profile_changed (PIKA_COLOR_MANAGED (image));
}
pika_image_set_converting (image, FALSE);
pika_image_undo_group_end (image);
pika_image_precision_changed (image);
g_object_thaw_notify (G_OBJECT (image));
g_object_unref (queue);
if (progress)
pika_progress_end (progress);
}
void
pika_image_convert_dither_u8 (PikaImage *image,
PikaProgress *progress)
{
GeglNode *dither;
g_return_if_fail (PIKA_IS_IMAGE (image));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
dither = gegl_node_new_child (NULL,
"operation", "gegl:noise-rgb",
"red", 1.0 / 256.0,
"green", 1.0 / 256.0,
"blue", 1.0 / 256.0,
"linear", FALSE,
"gaussian", FALSE,
NULL);
if (dither)
{
PikaObjectQueue *queue;
PikaProgress *sub_progress;
GList *layers;
GList *list;
PikaDrawable *drawable;
if (progress)
pika_progress_start (progress, FALSE, "%s", _("Dithering"));
queue = pika_object_queue_new (progress);
sub_progress = PIKA_PROGRESS (queue);
layers = pika_image_get_layer_list (image);
for (list = layers; list; list = g_list_next (list))
{
if (! pika_viewable_get_children (list->data) &&
! pika_item_is_text_layer (list->data))
{
pika_object_queue_push (queue, list->data);
}
}
g_list_free (layers);
while ((drawable = pika_object_queue_pop (queue)))
{
pika_drawable_apply_operation (drawable, sub_progress,
_("Dithering"),
dither);
}
g_object_unref (queue);
if (progress)
pika_progress_end (progress);
g_object_unref (dither);
}
}
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