286 lines
9.2 KiB
C
286 lines
9.2 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikaimage-convert-precision.c
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* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <cairo.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libpikabase/pikabase.h"
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#include "libpikacolor/pikacolor.h"
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#include "core-types.h"
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#include "gegl/pika-babl.h"
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#include "gegl/pika-gegl-loops.h"
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#include "pikachannel.h"
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#include "pikadrawable.h"
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#include "pikadrawable-operation.h"
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#include "pikaimage.h"
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#include "pikaimage-color-profile.h"
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#include "pikaimage-convert-precision.h"
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#include "pikaimage-undo.h"
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#include "pikaimage-undo-push.h"
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#include "pikaobjectqueue.h"
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#include "pikaprogress.h"
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#include "text/pikatextlayer.h"
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#include "pika-intl.h"
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void
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pika_image_convert_precision (PikaImage *image,
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PikaPrecision precision,
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GeglDitherMethod layer_dither_type,
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GeglDitherMethod text_layer_dither_type,
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GeglDitherMethod mask_dither_type,
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PikaProgress *progress)
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{
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PikaColorProfile *old_profile;
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PikaColorProfile *new_profile = NULL;
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const Babl *old_format;
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const Babl *new_format;
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PikaObjectQueue *queue;
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PikaProgress *sub_progress;
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GList *layers;
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PikaDrawable *drawable;
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const gchar *enum_desc;
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gchar *undo_desc = NULL;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (precision != pika_image_get_precision (image));
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g_return_if_fail (pika_babl_is_valid (pika_image_get_base_type (image),
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precision));
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g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
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pika_enum_get_value (PIKA_TYPE_PRECISION, precision,
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NULL, NULL, &enum_desc, NULL);
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undo_desc = g_strdup_printf (C_("undo-type", "Convert Image to %s"),
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enum_desc);
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if (progress)
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pika_progress_start (progress, FALSE, "%s", undo_desc);
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queue = pika_object_queue_new (progress);
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sub_progress = PIKA_PROGRESS (queue);
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layers = pika_image_get_layer_list (image);
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pika_object_queue_push_list (queue, layers);
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g_list_free (layers);
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pika_object_queue_push (queue, pika_image_get_mask (image));
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pika_object_queue_push_container (queue, pika_image_get_channels (image));
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g_object_freeze_notify (G_OBJECT (image));
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pika_image_undo_group_start (image, PIKA_UNDO_GROUP_IMAGE_CONVERT,
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undo_desc);
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g_free (undo_desc);
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/* Push the image precision to the stack */
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pika_image_undo_push_image_precision (image, NULL);
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old_profile = pika_color_managed_get_color_profile (PIKA_COLOR_MANAGED (image));
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old_format = pika_image_get_layer_format (image, FALSE);
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pika_image_set_converting (image, TRUE);
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/* Set the new precision */
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g_object_set (image, "precision", precision, NULL);
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new_format = pika_image_get_layer_format (image, FALSE);
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/* we use old_format and new_format just for looking at their
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* TRCs, new_format's space might be incorrect, don't use it
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* for anything else.
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*/
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if (pika_babl_format_get_trc (old_format) !=
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pika_babl_format_get_trc (new_format))
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{
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PikaImageBaseType base_type = pika_image_get_base_type (image);
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PikaTRCType new_trc = pika_babl_trc (precision);
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/* if the image doesn't use the builtin profile, create a new
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* one, using the original profile's chromacities and
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* whitepoint, but a linear/sRGB-gamma TRC.
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*/
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if (pika_image_get_color_profile (image))
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{
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if (new_trc == PIKA_TRC_LINEAR)
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{
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new_profile =
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pika_color_profile_new_linear_from_color_profile (old_profile);
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}
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else
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{
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new_profile =
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pika_color_profile_new_srgb_trc_from_color_profile (old_profile);
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}
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}
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/* we always need a profile for convert_type with changing TRC
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* on the same image, use the new precision's builtin profile if
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* the profile couldn't be converted or the image used the old
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* TRC's builtin profile.
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*/
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if (! new_profile)
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{
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new_profile = pika_babl_get_builtin_color_profile (base_type,
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new_trc);
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g_object_ref (new_profile);
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}
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}
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while ((drawable = pika_object_queue_pop (queue)))
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{
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if (drawable == PIKA_DRAWABLE (pika_image_get_mask (image)))
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{
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GeglBuffer *buffer;
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pika_image_undo_push_mask_precision (image, NULL,
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PIKA_CHANNEL (drawable));
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buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
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pika_image_get_width (image),
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pika_image_get_height (image)),
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pika_image_get_mask_format (image));
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pika_gegl_buffer_copy (pika_drawable_get_buffer (drawable), NULL,
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GEGL_ABYSS_NONE,
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buffer, NULL);
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pika_drawable_set_buffer (drawable, FALSE, NULL, buffer);
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g_object_unref (buffer);
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pika_progress_set_value (sub_progress, 1.0);
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}
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else
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{
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GeglDitherMethod dither_type;
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if (pika_item_is_text_layer (PIKA_ITEM (drawable)))
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dither_type = text_layer_dither_type;
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else
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dither_type = layer_dither_type;
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pika_drawable_convert_type (drawable, image,
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pika_drawable_get_base_type (drawable),
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precision,
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pika_drawable_has_alpha (drawable),
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old_profile,
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new_profile,
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dither_type,
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mask_dither_type,
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TRUE, sub_progress);
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}
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}
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if (new_profile)
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{
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pika_image_set_color_profile (image, new_profile, NULL);
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g_object_unref (new_profile);
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}
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else
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{
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pika_color_managed_profile_changed (PIKA_COLOR_MANAGED (image));
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}
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pika_image_set_converting (image, FALSE);
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pika_image_undo_group_end (image);
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pika_image_precision_changed (image);
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g_object_thaw_notify (G_OBJECT (image));
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g_object_unref (queue);
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if (progress)
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pika_progress_end (progress);
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}
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void
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pika_image_convert_dither_u8 (PikaImage *image,
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PikaProgress *progress)
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{
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GeglNode *dither;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
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dither = gegl_node_new_child (NULL,
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"operation", "gegl:noise-rgb",
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"red", 1.0 / 256.0,
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"green", 1.0 / 256.0,
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"blue", 1.0 / 256.0,
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"linear", FALSE,
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"gaussian", FALSE,
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NULL);
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if (dither)
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{
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PikaObjectQueue *queue;
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PikaProgress *sub_progress;
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GList *layers;
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GList *list;
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PikaDrawable *drawable;
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if (progress)
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pika_progress_start (progress, FALSE, "%s", _("Dithering"));
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queue = pika_object_queue_new (progress);
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sub_progress = PIKA_PROGRESS (queue);
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layers = pika_image_get_layer_list (image);
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for (list = layers; list; list = g_list_next (list))
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{
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if (! pika_viewable_get_children (list->data) &&
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! pika_item_is_text_layer (list->data))
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{
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pika_object_queue_push (queue, list->data);
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}
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}
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g_list_free (layers);
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while ((drawable = pika_object_queue_pop (queue)))
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{
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pika_drawable_apply_operation (drawable, sub_progress,
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_("Dithering"),
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dither);
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}
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g_object_unref (queue);
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if (progress)
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pika_progress_end (progress);
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g_object_unref (dither);
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}
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}
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