149 lines
5.3 KiB
C
149 lines
5.3 KiB
C
/* 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 <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 "core-types.h"
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#include "gegl/pikaapplicator.h"
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#include "pika.h"
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#include "pikachannel.h"
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#include "pikachunkiterator.h"
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#include "pikadrawable-combine.h"
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#include "pikaimage.h"
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void
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pika_drawable_real_apply_buffer (PikaDrawable *drawable,
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GeglBuffer *buffer,
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const GeglRectangle *buffer_region,
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gboolean push_undo,
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const gchar *undo_desc,
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gdouble opacity,
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PikaLayerMode mode,
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PikaLayerColorSpace blend_space,
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PikaLayerColorSpace composite_space,
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PikaLayerCompositeMode composite_mode,
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GeglBuffer *base_buffer,
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gint base_x,
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gint base_y)
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{
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PikaItem *item = PIKA_ITEM (drawable);
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PikaImage *image = pika_item_get_image (item);
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PikaChannel *mask = pika_image_get_mask (image);
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PikaApplicator *applicator;
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PikaChunkIterator *iter;
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gint x, y, width, height;
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gint offset_x, offset_y;
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/* don't apply the mask to itself and don't apply an empty mask */
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if (PIKA_DRAWABLE (mask) == drawable || pika_channel_is_empty (mask))
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mask = NULL;
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if (! base_buffer)
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base_buffer = pika_drawable_get_buffer (drawable);
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/* get the layer offsets */
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pika_item_get_offset (item, &offset_x, &offset_y);
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/* make sure the image application coordinates are within drawable bounds */
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if (! pika_rectangle_intersect (base_x, base_y,
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buffer_region->width, buffer_region->height,
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0, 0,
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pika_item_get_width (item),
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pika_item_get_height (item),
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&x, &y, &width, &height))
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{
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return;
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}
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if (mask)
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{
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PikaItem *mask_item = PIKA_ITEM (mask);
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/* make sure coordinates are in mask bounds ...
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* we need to add the layer offset to transform coords
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* into the mask coordinate system
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*/
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if (! pika_rectangle_intersect (x, y, width, height,
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-offset_x, -offset_y,
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pika_item_get_width (mask_item),
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pika_item_get_height (mask_item),
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&x, &y, &width, &height))
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{
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return;
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}
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}
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if (push_undo)
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{
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pika_drawable_push_undo (drawable, undo_desc,
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NULL, x, y, width, height);
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}
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applicator = pika_applicator_new (NULL);
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if (mask)
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{
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GeglBuffer *mask_buffer;
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mask_buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (mask));
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pika_applicator_set_mask_buffer (applicator, mask_buffer);
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pika_applicator_set_mask_offset (applicator, -offset_x, -offset_y);
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}
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pika_applicator_set_src_buffer (applicator, base_buffer);
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pika_applicator_set_dest_buffer (applicator,
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pika_drawable_get_buffer (drawable));
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pika_applicator_set_apply_buffer (applicator, buffer);
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pika_applicator_set_apply_offset (applicator,
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base_x - buffer_region->x,
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base_y - buffer_region->y);
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pika_applicator_set_opacity (applicator, opacity);
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pika_applicator_set_mode (applicator, mode,
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blend_space, composite_space, composite_mode);
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pika_applicator_set_affect (applicator,
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pika_drawable_get_active_mask (drawable));
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iter = pika_chunk_iterator_new (cairo_region_create_rectangle (
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&(cairo_rectangle_int_t) {x, y, width, height}));
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while (pika_chunk_iterator_next (iter))
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{
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GeglRectangle rect;
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while (pika_chunk_iterator_get_rect (iter, &rect))
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pika_applicator_blit (applicator, &rect);
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}
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g_object_unref (applicator);
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}
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