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-rw-r--r--app/core/gimpdrawable-combine.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/app/core/gimpdrawable-combine.c b/app/core/gimpdrawable-combine.c
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+++ b/app/core/gimpdrawable-combine.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 "libgimpbase/gimpbase.h"
+
+#include "core-types.h"
+
+#include "gegl/gimpapplicator.h"
+
+#include "gimp.h"
+#include "gimpchannel.h"
+#include "gimpchunkiterator.h"
+#include "gimpdrawable-combine.h"
+#include "gimpimage.h"
+
+
+void
+gimp_drawable_real_apply_buffer (GimpDrawable *drawable,
+ GeglBuffer *buffer,
+ const GeglRectangle *buffer_region,
+ gboolean push_undo,
+ const gchar *undo_desc,
+ gdouble opacity,
+ GimpLayerMode mode,
+ GimpLayerColorSpace blend_space,
+ GimpLayerColorSpace composite_space,
+ GimpLayerCompositeMode composite_mode,
+ GeglBuffer *base_buffer,
+ gint base_x,
+ gint base_y)
+{
+ GimpItem *item = GIMP_ITEM (drawable);
+ GimpImage *image = gimp_item_get_image (item);
+ GimpChannel *mask = gimp_image_get_mask (image);
+ GimpApplicator *applicator;
+ GimpChunkIterator *iter;
+ gint x, y, width, height;
+ gint offset_x, offset_y;
+
+ /* don't apply the mask to itself and don't apply an empty mask */
+ if (GIMP_DRAWABLE (mask) == drawable || gimp_channel_is_empty (mask))
+ mask = NULL;
+
+ if (! base_buffer)
+ base_buffer = gimp_drawable_get_buffer (drawable);
+
+ /* get the layer offsets */
+ gimp_item_get_offset (item, &offset_x, &offset_y);
+
+ /* make sure the image application coordinates are within drawable bounds */
+ if (! gimp_rectangle_intersect (base_x, base_y,
+ buffer_region->width, buffer_region->height,
+ 0, 0,
+ gimp_item_get_width (item),
+ gimp_item_get_height (item),
+ &x, &y, &width, &height))
+ {
+ return;
+ }
+
+ if (mask)
+ {
+ GimpItem *mask_item = GIMP_ITEM (mask);
+
+ /* make sure coordinates are in mask bounds ...
+ * we need to add the layer offset to transform coords
+ * into the mask coordinate system
+ */
+ if (! gimp_rectangle_intersect (x, y, width, height,
+ -offset_x, -offset_y,
+ gimp_item_get_width (mask_item),
+ gimp_item_get_height (mask_item),
+ &x, &y, &width, &height))
+ {
+ return;
+ }
+ }
+
+ if (push_undo)
+ {
+ gimp_drawable_push_undo (drawable, undo_desc,
+ NULL, x, y, width, height);
+ }
+
+ applicator = gimp_applicator_new (NULL);
+
+ if (mask)
+ {
+ GeglBuffer *mask_buffer;
+
+ mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
+
+ gimp_applicator_set_mask_buffer (applicator, mask_buffer);
+ gimp_applicator_set_mask_offset (applicator, -offset_x, -offset_y);
+ }
+
+ gimp_applicator_set_src_buffer (applicator, base_buffer);
+ gimp_applicator_set_dest_buffer (applicator,
+ gimp_drawable_get_buffer (drawable));
+
+ gimp_applicator_set_apply_buffer (applicator, buffer);
+ gimp_applicator_set_apply_offset (applicator,
+ base_x - buffer_region->x,
+ base_y - buffer_region->y);
+
+ gimp_applicator_set_opacity (applicator, opacity);
+ gimp_applicator_set_mode (applicator, mode,
+ blend_space, composite_space, composite_mode);
+ gimp_applicator_set_affect (applicator,
+ gimp_drawable_get_active_mask (drawable));
+
+ iter = gimp_chunk_iterator_new (cairo_region_create_rectangle (
+ &(cairo_rectangle_int_t) {x, y, width, height}));
+
+ while (gimp_chunk_iterator_next (iter))
+ {
+ GeglRectangle rect;
+
+ while (gimp_chunk_iterator_get_rect (iter, &rect))
+ gimp_applicator_blit (applicator, &rect);
+ }
+
+ g_object_unref (applicator);
+}