609 lines
18 KiB
C
609 lines
18 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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* 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 <string.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 "libpikamath/pikamath.h"
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#include "core-types.h"
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#include "gegl/pika-gegl-mask-combine.h"
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#include "pika.h"
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#include "pikachannel.h"
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#include "pikachannel-combine.h"
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#include "pikaimage.h"
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#include "pikaimage-merge.h"
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#include "pikaimage-new.h"
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#include "pikalayer.h"
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#include "vectors/pikavectors.h"
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typedef struct
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{
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GeglRectangle rect;
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gboolean bounds_known;
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gboolean empty;
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GeglRectangle bounds;
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} PikaChannelCombineData;
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/* local function prototypes */
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static void pika_channel_combine_clear (PikaChannel *mask,
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const GeglRectangle *rect);
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static void pika_channel_combine_clear_complement (PikaChannel *mask,
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const GeglRectangle *rect);
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static gboolean pika_channel_combine_start (PikaChannel *mask,
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PikaChannelOps op,
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const GeglRectangle *rect,
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gboolean full_extent,
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gboolean full_value,
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PikaChannelCombineData *data);
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static void pika_channel_combine_end (PikaChannel *mask,
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PikaChannelCombineData *data);
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/* private functions */
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static void
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pika_channel_combine_clear (PikaChannel *mask,
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const GeglRectangle *rect)
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{
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GeglBuffer *buffer;
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GeglRectangle area;
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GeglRectangle update_area;
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if (mask->bounds_known && mask->empty)
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return;
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buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
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if (rect)
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{
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if (rect->width <= 0 || rect->height <= 0)
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return;
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if (mask->bounds_known)
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{
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if (! gegl_rectangle_intersect (&area,
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GEGL_RECTANGLE (mask->x1,
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mask->y1,
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mask->x2 - mask->x1,
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mask->y2 - mask->y1),
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rect))
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{
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return;
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}
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}
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else
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{
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area = *rect;
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}
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update_area = area;
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}
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else
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{
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if (mask->bounds_known)
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{
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area.x = mask->x1;
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area.y = mask->y1;
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area.width = mask->x2 - mask->x1;
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area.height = mask->y2 - mask->y1;
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}
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else
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{
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area.x = 0;
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area.y = 0;
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area.width = pika_item_get_width (PIKA_ITEM (mask));
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area.height = pika_item_get_height (PIKA_ITEM (mask));
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}
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update_area = area;
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gegl_rectangle_align_to_buffer (&area, &area, buffer,
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GEGL_RECTANGLE_ALIGNMENT_SUPERSET);
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}
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gegl_buffer_clear (buffer, &area);
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pika_drawable_update (PIKA_DRAWABLE (mask),
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update_area.x, update_area.y,
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update_area.width, update_area.height);
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}
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static void
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pika_channel_combine_clear_complement (PikaChannel *mask,
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const GeglRectangle *rect)
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{
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gint width = pika_item_get_width (PIKA_ITEM (mask));
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gint height = pika_item_get_height (PIKA_ITEM (mask));
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pika_channel_combine_clear (
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mask,
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GEGL_RECTANGLE (0,
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0,
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width,
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rect->y));
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pika_channel_combine_clear (
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mask,
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GEGL_RECTANGLE (0,
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rect->y + rect->height,
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width,
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height - (rect->y + rect->height)));
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pika_channel_combine_clear (
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mask,
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GEGL_RECTANGLE (0,
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rect->y,
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rect->x,
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rect->height));
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pika_channel_combine_clear (
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mask,
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GEGL_RECTANGLE (rect->x + rect->width,
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rect->y,
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width - (rect->x + rect->width),
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rect->height));
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}
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static gboolean
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pika_channel_combine_start (PikaChannel *mask,
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PikaChannelOps op,
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const GeglRectangle *rect,
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gboolean full_extent,
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gboolean full_value,
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PikaChannelCombineData *data)
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{
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GeglBuffer *buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
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GeglRectangle extent;
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gboolean intersects;
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extent.x = 0;
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extent.y = 0;
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extent.width = pika_item_get_width (PIKA_ITEM (mask));
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extent.height = pika_item_get_height (PIKA_ITEM (mask));
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intersects = gegl_rectangle_intersect (&data->rect, rect, &extent);
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data->bounds_known = mask->bounds_known;
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data->empty = mask->empty;
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data->bounds.x = mask->x1;
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data->bounds.y = mask->y1;
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data->bounds.width = mask->x2 - mask->x1;
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data->bounds.height = mask->y2 - mask->y1;
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gegl_buffer_freeze_changed (buffer);
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/* Determine new boundary */
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switch (op)
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{
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case PIKA_CHANNEL_OP_REPLACE:
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pika_channel_combine_clear (mask, NULL);
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if (! intersects)
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{
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data->bounds_known = TRUE;
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data->empty = TRUE;
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return FALSE;
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}
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data->bounds_known = FALSE;
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if (full_extent)
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{
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data->bounds_known = TRUE;
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data->empty = FALSE;
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data->bounds = data->rect;
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}
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break;
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case PIKA_CHANNEL_OP_ADD:
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if (! intersects)
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return FALSE;
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data->bounds_known = FALSE;
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if (full_extent && (mask->bounds_known ||
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gegl_rectangle_equal (&data->rect, &extent)))
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{
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data->bounds_known = TRUE;
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data->empty = FALSE;
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if (mask->bounds_known && ! mask->empty)
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{
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gegl_rectangle_bounding_box (&data->bounds,
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&data->bounds, &data->rect);
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}
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else
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{
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data->bounds = data->rect;
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}
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}
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break;
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case PIKA_CHANNEL_OP_SUBTRACT:
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if (intersects && mask->bounds_known)
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{
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if (mask->empty)
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{
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intersects = FALSE;
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}
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else
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{
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intersects = gegl_rectangle_intersect (&data->rect,
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&data->rect,
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&data->bounds);
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}
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}
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if (! intersects)
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return FALSE;
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if (full_value &&
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gegl_rectangle_contains (&data->rect,
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mask->bounds_known ? &data->bounds :
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&extent))
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{
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pika_channel_combine_clear (mask, NULL);
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data->bounds_known = TRUE;
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data->empty = TRUE;
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return FALSE;
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}
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data->bounds_known = FALSE;
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gegl_buffer_set_abyss (buffer, &data->rect);
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break;
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case PIKA_CHANNEL_OP_INTERSECT:
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if (intersects && mask->bounds_known)
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{
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if (mask->empty)
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{
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intersects = FALSE;
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}
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else
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{
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intersects = gegl_rectangle_intersect (&data->rect,
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&data->rect,
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&data->bounds);
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}
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}
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if (! intersects)
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{
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pika_channel_combine_clear (mask, NULL);
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data->bounds_known = TRUE;
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data->empty = TRUE;
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return FALSE;
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}
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if (full_value && mask->bounds_known &&
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gegl_rectangle_contains (&data->rect, &data->bounds))
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{
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return FALSE;
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}
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data->bounds_known = FALSE;
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pika_channel_combine_clear_complement (mask, &data->rect);
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gegl_buffer_set_abyss (buffer, &data->rect);
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break;
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}
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return TRUE;
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}
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static void
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pika_channel_combine_end (PikaChannel *mask,
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PikaChannelCombineData *data)
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{
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GeglBuffer *buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
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gegl_buffer_set_abyss (buffer, gegl_buffer_get_extent (buffer));
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gegl_buffer_thaw_changed (buffer);
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mask->bounds_known = data->bounds_known;
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if (data->bounds_known)
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{
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mask->empty = data->empty;
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if (data->empty)
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{
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mask->x1 = 0;
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mask->y1 = 0;
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mask->x2 = pika_item_get_width (PIKA_ITEM (mask));
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mask->y2 = pika_item_get_height (PIKA_ITEM (mask));
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}
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else
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{
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mask->x1 = data->bounds.x;
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mask->y1 = data->bounds.y;
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mask->x2 = data->bounds.x + data->bounds.width;
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mask->y2 = data->bounds.y + data->bounds.height;
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}
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}
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pika_drawable_update (PIKA_DRAWABLE (mask),
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data->rect.x, data->rect.y,
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data->rect.width, data->rect.height);
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}
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/* public functions */
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void
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pika_channel_combine_rect (PikaChannel *mask,
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PikaChannelOps op,
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gint x,
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gint y,
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gint w,
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gint h)
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{
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PikaChannelCombineData data;
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g_return_if_fail (PIKA_IS_CHANNEL (mask));
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if (pika_channel_combine_start (mask, op, GEGL_RECTANGLE (x, y, w, h),
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TRUE, TRUE, &data))
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{
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GeglBuffer *buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
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pika_gegl_mask_combine_rect (buffer, op, x, y, w, h);
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}
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pika_channel_combine_end (mask, &data);
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}
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void
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pika_channel_combine_ellipse (PikaChannel *mask,
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PikaChannelOps op,
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gint x,
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gint y,
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gint w,
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gint h,
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gboolean antialias)
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{
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pika_channel_combine_ellipse_rect (mask, op, x, y, w, h,
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w / 2.0, h / 2.0, antialias);
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}
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||
|
|
void
|
||
|
|
pika_channel_combine_ellipse_rect (PikaChannel *mask,
|
||
|
|
PikaChannelOps op,
|
||
|
|
gint x,
|
||
|
|
gint y,
|
||
|
|
gint w,
|
||
|
|
gint h,
|
||
|
|
gdouble rx,
|
||
|
|
gdouble ry,
|
||
|
|
gboolean antialias)
|
||
|
|
{
|
||
|
|
PikaChannelCombineData data;
|
||
|
|
|
||
|
|
g_return_if_fail (PIKA_IS_CHANNEL (mask));
|
||
|
|
|
||
|
|
if (pika_channel_combine_start (mask, op, GEGL_RECTANGLE (x, y, w, h),
|
||
|
|
TRUE, FALSE, &data))
|
||
|
|
{
|
||
|
|
GeglBuffer *buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
|
||
|
|
|
||
|
|
pika_gegl_mask_combine_ellipse_rect (buffer, op, x, y, w, h,
|
||
|
|
rx, ry, antialias);
|
||
|
|
}
|
||
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|
|
||
|
|
pika_channel_combine_end (mask, &data);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
pika_channel_combine_mask (PikaChannel *mask,
|
||
|
|
PikaChannel *add_on,
|
||
|
|
PikaChannelOps op,
|
||
|
|
gint off_x,
|
||
|
|
gint off_y)
|
||
|
|
{
|
||
|
|
GeglBuffer *add_on_buffer;
|
||
|
|
|
||
|
|
g_return_if_fail (PIKA_IS_CHANNEL (mask));
|
||
|
|
g_return_if_fail (PIKA_IS_CHANNEL (add_on));
|
||
|
|
|
||
|
|
add_on_buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (add_on));
|
||
|
|
|
||
|
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pika_channel_combine_buffer (mask, add_on_buffer,
|
||
|
|
op, off_x, off_y);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
pika_channel_combine_buffer (PikaChannel *mask,
|
||
|
|
GeglBuffer *add_on_buffer,
|
||
|
|
PikaChannelOps op,
|
||
|
|
gint off_x,
|
||
|
|
gint off_y)
|
||
|
|
{
|
||
|
|
PikaChannelCombineData data;
|
||
|
|
|
||
|
|
g_return_if_fail (PIKA_IS_CHANNEL (mask));
|
||
|
|
g_return_if_fail (GEGL_IS_BUFFER (add_on_buffer));
|
||
|
|
|
||
|
|
if (pika_channel_combine_start (mask, op,
|
||
|
|
GEGL_RECTANGLE (
|
||
|
|
off_x + gegl_buffer_get_x (add_on_buffer),
|
||
|
|
off_y + gegl_buffer_get_y (add_on_buffer),
|
||
|
|
gegl_buffer_get_width (add_on_buffer),
|
||
|
|
gegl_buffer_get_height (add_on_buffer)),
|
||
|
|
FALSE, FALSE, &data))
|
||
|
|
{
|
||
|
|
GeglBuffer *buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
|
||
|
|
|
||
|
|
pika_gegl_mask_combine_buffer (buffer, add_on_buffer, op,
|
||
|
|
off_x, off_y);
|
||
|
|
}
|
||
|
|
|
||
|
|
pika_channel_combine_end (mask, &data);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* pika_channel_combine_items:
|
||
|
|
* @channel:
|
||
|
|
* @items:
|
||
|
|
* @op:
|
||
|
|
*
|
||
|
|
* Edit @channel with the given @items, according to the boolean @op.
|
||
|
|
* @items need to belong to the same image, but it doesn't have to be
|
||
|
|
* the owner image of @channel.
|
||
|
|
* If @items contain a single layer, it will be used as-is, without
|
||
|
|
* caring about opacity, mode or visibility.
|
||
|
|
* If @items contain several layers, they will be used composited using
|
||
|
|
* their opacity, mode, visibility, etc. properties within the image
|
||
|
|
* (similar as if a "merge visible" had been applied to the image then
|
||
|
|
* the resulting layer used alone).
|
||
|
|
* If @items contain channels or vectors, they will be added as a set
|
||
|
|
* (i.e. as a single item which is an union of other items). E.g. an
|
||
|
|
* combine in PIKA_CHANNEL_OP_INTERSECT mode does not intersect all
|
||
|
|
* @items with each other and @channel. It first adds-alike all @items
|
||
|
|
* together, then intersects the result with @channel.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
pika_channel_combine_items (PikaChannel *mask,
|
||
|
|
GList *items,
|
||
|
|
PikaChannelOps op)
|
||
|
|
{
|
||
|
|
PikaImage *image;
|
||
|
|
PikaImage *items_image = NULL;
|
||
|
|
PikaImage *temp_image = NULL;
|
||
|
|
|
||
|
|
PikaChannel *channel = NULL;
|
||
|
|
GList *layers = NULL;
|
||
|
|
GList *iter;
|
||
|
|
|
||
|
|
g_return_if_fail (PIKA_IS_CHANNEL (mask));
|
||
|
|
g_return_if_fail (g_list_length (items) > 0);
|
||
|
|
|
||
|
|
for (iter = items; iter; iter = iter->next)
|
||
|
|
{
|
||
|
|
g_return_if_fail (PIKA_IS_LAYER (iter->data) ||
|
||
|
|
PIKA_IS_CHANNEL (iter->data) ||
|
||
|
|
PIKA_IS_VECTORS (iter->data));
|
||
|
|
|
||
|
|
if (items_image == NULL)
|
||
|
|
items_image = pika_item_get_image (iter->data);
|
||
|
|
else
|
||
|
|
g_return_if_fail (items_image == pika_item_get_image (iter->data));
|
||
|
|
|
||
|
|
if (PIKA_IS_LAYER (iter->data))
|
||
|
|
layers = g_list_prepend (layers, iter->data);
|
||
|
|
}
|
||
|
|
|
||
|
|
image = pika_item_get_image (PIKA_ITEM (mask));
|
||
|
|
if (g_list_length (layers) > 1)
|
||
|
|
{
|
||
|
|
GList *merged_layers;
|
||
|
|
|
||
|
|
temp_image = pika_image_new_from_drawables (image->pika, items, FALSE, FALSE);
|
||
|
|
merged_layers = pika_image_merge_visible_layers (temp_image,
|
||
|
|
pika_get_user_context (temp_image->pika),
|
||
|
|
PIKA_CLIP_TO_IMAGE,
|
||
|
|
FALSE, TRUE, NULL);
|
||
|
|
g_return_if_fail (g_list_length (merged_layers) == 1);
|
||
|
|
pika_item_to_selection (PIKA_ITEM (merged_layers->data),
|
||
|
|
PIKA_CHANNEL_OP_REPLACE,
|
||
|
|
TRUE, FALSE, 0.0, 0.0);
|
||
|
|
channel = pika_image_get_mask (temp_image);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (! channel)
|
||
|
|
{
|
||
|
|
channel = pika_channel_new (image,
|
||
|
|
pika_image_get_width (image),
|
||
|
|
pika_image_get_height (image),
|
||
|
|
NULL, NULL);
|
||
|
|
pika_channel_clear (channel, NULL, FALSE);
|
||
|
|
|
||
|
|
if (g_list_length (layers) == 1)
|
||
|
|
{
|
||
|
|
if (pika_drawable_has_alpha (layers->data))
|
||
|
|
{
|
||
|
|
PikaChannel *alpha;
|
||
|
|
gint offset_x;
|
||
|
|
gint offset_y;
|
||
|
|
|
||
|
|
alpha = pika_channel_new_from_alpha (image,
|
||
|
|
layers->data, NULL, NULL);
|
||
|
|
pika_item_get_offset (layers->data, &offset_x, &offset_y);
|
||
|
|
pika_channel_combine_mask (channel, alpha,
|
||
|
|
PIKA_CHANNEL_OP_REPLACE,
|
||
|
|
offset_x, offset_y);
|
||
|
|
g_object_unref (alpha);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pika_channel_all (channel, FALSE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (iter = items; iter; iter = iter->next)
|
||
|
|
{
|
||
|
|
if (! PIKA_IS_LAYER (iter->data))
|
||
|
|
{
|
||
|
|
gint offset_x;
|
||
|
|
gint offset_y;
|
||
|
|
|
||
|
|
pika_item_get_offset (iter->data, &offset_x, &offset_y);
|
||
|
|
pika_channel_combine_buffer (channel,
|
||
|
|
pika_drawable_get_buffer (PIKA_DRAWABLE (iter->data)),
|
||
|
|
PIKA_CHANNEL_OP_ADD, offset_x, offset_y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pika_channel_combine_buffer (mask,
|
||
|
|
pika_drawable_get_buffer (PIKA_DRAWABLE (channel)),
|
||
|
|
op, 0, 0);
|
||
|
|
|
||
|
|
if (temp_image)
|
||
|
|
g_object_unref (temp_image);
|
||
|
|
else
|
||
|
|
g_object_unref (channel);
|
||
|
|
|
||
|
|
g_list_free (layers);
|
||
|
|
}
|
