mirror of https://github.com/GNOME/gimp.git
723 lines
22 KiB
C
723 lines
22 KiB
C
/* GIMP - The GNU Image Manipulation Program
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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 <http://www.gnu.org/licenses/>.
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*/
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/* This file contains the code necessary for generating on canvas
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* previews, either by connecting a function to process the pixels or
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* by connecting a specified GEGL operation to do the processing. It
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* keeps an undo buffer to allow direct modification of the pixel data
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* (so that it will show up in the projection) and it will restore the
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* source in case the mapping procedure was cancelled.
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*
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* To create a tool that uses this, see /tools/gimpimagemaptool.c for
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* the interface and /tools/gimpcolorbalancetool.c for an example of
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* using that interface.
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*
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* Note that when talking about on canvas preview, we are speaking
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* about non destructive image editing where the operation is previewd
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* before being applied.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include <gegl.h>
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#include "core-types.h"
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#include "gegl/gimp-gegl-utils.h"
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#include "gimpdrawable.h"
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#include "gimpdrawable-shadow.h"
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#include "gimpimage.h"
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#include "gimpimagemap.h"
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#include "gimpmarshal.h"
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#include "gimppickable.h"
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#include "gimpviewable.h"
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#include "gimpchannel.h"
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enum
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{
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FLUSH,
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LAST_SIGNAL
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};
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struct _GimpImageMap
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{
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GimpObject parent_instance;
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GimpDrawable *drawable;
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gchar *undo_desc;
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GeglBuffer *undo_buffer;
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gint undo_offset_x;
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gint undo_offset_y;
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GeglNode *gegl;
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GeglNode *input;
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GeglNode *translate;
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GeglNode *operation;
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GeglNode *output;
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GeglProcessor *processor;
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guint idle_id;
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GTimer *timer;
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guint64 pixel_count;
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};
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static void gimp_image_map_pickable_iface_init (GimpPickableInterface *iface);
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static void gimp_image_map_dispose (GObject *object);
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static void gimp_image_map_finalize (GObject *object);
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static GimpImage * gimp_image_map_get_image (GimpPickable *pickable);
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static const Babl * gimp_image_map_get_format (GimpPickable *pickable);
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static const Babl * gimp_image_map_get_format_with_alpha
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(GimpPickable *pickable);
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static GeglBuffer * gimp_image_map_get_buffer (GimpPickable *pickable);
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static TileManager * gimp_image_map_get_tiles (GimpPickable *pickable);
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static gboolean gimp_image_map_get_pixel_at (GimpPickable *pickable,
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gint x,
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gint y,
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guchar *pixel);
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static void gimp_image_map_update_undo_buffer
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(GimpImageMap *image_map,
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const GeglRectangle *rect);
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static gboolean gimp_image_map_do (GimpImageMap *image_map);
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static void gimp_image_map_data_written (GObject *operation,
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const GeglRectangle *extent,
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GimpImageMap *image_map);
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static void gimp_image_map_stop_idle (GimpImageMap *image_map);
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G_DEFINE_TYPE_WITH_CODE (GimpImageMap, gimp_image_map, GIMP_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
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gimp_image_map_pickable_iface_init))
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#define parent_class gimp_image_map_parent_class
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static guint image_map_signals[LAST_SIGNAL] = { 0 };
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static void
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gimp_image_map_class_init (GimpImageMapClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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image_map_signals[FLUSH] =
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g_signal_new ("flush",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpImageMapClass, flush),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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object_class->dispose = gimp_image_map_dispose;
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object_class->finalize = gimp_image_map_finalize;
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}
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static void
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gimp_image_map_pickable_iface_init (GimpPickableInterface *iface)
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{
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iface->get_image = gimp_image_map_get_image;
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iface->get_format = gimp_image_map_get_format;
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iface->get_format_with_alpha = gimp_image_map_get_format_with_alpha;
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iface->get_buffer = gimp_image_map_get_buffer;
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iface->get_tiles = gimp_image_map_get_tiles;
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iface->get_pixel_at = gimp_image_map_get_pixel_at;
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}
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static void
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gimp_image_map_init (GimpImageMap *image_map)
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{
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image_map->drawable = NULL;
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image_map->undo_desc = NULL;
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image_map->undo_buffer = NULL;
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image_map->undo_offset_x = 0;
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image_map->undo_offset_y = 0;
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image_map->idle_id = 0;
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#ifdef GIMP_UNSTABLE
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image_map->timer = g_timer_new ();
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#else
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image_map->timer = NULL;
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#endif
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image_map->pixel_count = 0;
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if (image_map->timer)
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g_timer_stop (image_map->timer);
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}
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static void
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gimp_image_map_dispose (GObject *object)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (object);
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if (image_map->drawable)
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gimp_viewable_preview_thaw (GIMP_VIEWABLE (image_map->drawable));
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gimp_image_map_finalize (GObject *object)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (object);
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if (image_map->undo_desc)
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{
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g_free (image_map->undo_desc);
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image_map->undo_desc = NULL;
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}
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if (image_map->undo_buffer)
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{
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g_object_unref (image_map->undo_buffer);
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image_map->undo_buffer = NULL;
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}
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gimp_image_map_stop_idle (image_map);
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if (image_map->gegl)
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{
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g_object_unref (image_map->gegl);
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image_map->gegl = NULL;
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image_map->input = NULL;
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image_map->translate = NULL;
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image_map->output = NULL;
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}
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if (image_map->operation)
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{
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g_object_unref (image_map->operation);
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image_map->operation = NULL;
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}
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if (image_map->drawable)
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{
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gimp_drawable_free_shadow_buffer (image_map->drawable);
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g_object_unref (image_map->drawable);
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image_map->drawable = NULL;
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}
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if (image_map->timer)
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{
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g_timer_destroy (image_map->timer);
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image_map->timer = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GimpImage *
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gimp_image_map_get_image (GimpPickable *pickable)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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return gimp_pickable_get_image (GIMP_PICKABLE (image_map->drawable));
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}
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static const Babl *
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gimp_image_map_get_format (GimpPickable *pickable)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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return gimp_pickable_get_format (GIMP_PICKABLE (image_map->drawable));
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}
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static const Babl *
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gimp_image_map_get_format_with_alpha (GimpPickable *pickable)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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return gimp_pickable_get_format_with_alpha (GIMP_PICKABLE (image_map->drawable));
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}
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static GeglBuffer *
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gimp_image_map_get_buffer (GimpPickable *pickable)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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if (image_map->undo_buffer)
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return image_map->undo_buffer;
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return gimp_pickable_get_buffer (GIMP_PICKABLE (image_map->drawable));
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}
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static TileManager *
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gimp_image_map_get_tiles (GimpPickable *pickable)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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if (image_map->undo_buffer)
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return gimp_gegl_buffer_get_tiles (image_map->undo_buffer);
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return gimp_pickable_get_tiles (GIMP_PICKABLE (image_map->drawable));
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}
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static gboolean
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gimp_image_map_get_pixel_at (GimpPickable *pickable,
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gint x,
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gint y,
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guchar *pixel)
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{
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GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
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GimpItem *item = GIMP_ITEM (image_map->drawable);
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if (x >= 0 && x < gimp_item_get_width (item) &&
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y >= 0 && y < gimp_item_get_height (item))
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{
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/* Check if done damage to original image */
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if (image_map->undo_buffer)
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{
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gint offset_x = image_map->undo_offset_x;
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gint offset_y = image_map->undo_offset_y;
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gint width = gegl_buffer_get_width (image_map->undo_buffer);
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gint height = gegl_buffer_get_height (image_map->undo_buffer);
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if (x >= offset_x && x < offset_x + width &&
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y >= offset_y && y < offset_y + height)
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{
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gegl_buffer_sample (image_map->undo_buffer,
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x - offset_x, y - offset_y,
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NULL, pixel,
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gimp_drawable_get_format (image_map->drawable),
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GEGL_SAMPLER_NEAREST,
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GEGL_ABYSS_NONE);
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return TRUE;
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}
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}
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return gimp_pickable_get_pixel_at (GIMP_PICKABLE (image_map->drawable),
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x, y, pixel);
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}
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return FALSE;
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}
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GimpImageMap *
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gimp_image_map_new (GimpDrawable *drawable,
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const gchar *undo_desc,
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GeglNode *operation)
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{
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GimpImageMap *image_map;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
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g_return_val_if_fail (GEGL_IS_NODE (operation), NULL);
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image_map = g_object_new (GIMP_TYPE_IMAGE_MAP, NULL);
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image_map->drawable = g_object_ref (drawable);
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image_map->undo_desc = g_strdup (undo_desc);
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if (operation)
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image_map->operation = g_object_ref (operation);
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gimp_viewable_preview_freeze (GIMP_VIEWABLE (drawable));
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return image_map;
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}
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void
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gimp_image_map_apply (GimpImageMap *image_map,
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const GeglRectangle *visible)
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{
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GeglBuffer *input_buffer;
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GeglBuffer *output_buffer;
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GeglRectangle rect;
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g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
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/* If we're still working, remove the timer */
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gimp_image_map_stop_idle (image_map);
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/* Make sure the drawable is still valid */
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if (! gimp_item_is_attached (GIMP_ITEM (image_map->drawable)))
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return;
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/* The application should occur only within selection bounds */
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if (! gimp_item_mask_intersect (GIMP_ITEM (image_map->drawable),
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&rect.x, &rect.y,
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&rect.width, &rect.height))
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return;
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/* If undo tiles don't exist, or change size, (re)allocate */
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gimp_image_map_update_undo_buffer (image_map, &rect);
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input_buffer = image_map->undo_buffer;
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output_buffer = gimp_drawable_get_shadow_buffer (image_map->drawable);
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if (! image_map->gegl)
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{
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image_map->gegl = gegl_node_new ();
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g_object_set (image_map->gegl,
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"dont-cache", TRUE,
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NULL);
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image_map->input =
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gegl_node_new_child (image_map->gegl,
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"operation", "gegl:buffer-source",
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NULL);
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image_map->translate =
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gegl_node_new_child (image_map->gegl,
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"operation", "gegl:translate",
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NULL);
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gegl_node_add_child (image_map->gegl, image_map->operation);
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image_map->output =
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gegl_node_new_child (image_map->gegl,
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"operation", "gegl:write-buffer",
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NULL);
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g_signal_connect (image_map->output, "computed",
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G_CALLBACK (gimp_image_map_data_written),
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image_map);
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if (gegl_node_has_pad (image_map->operation, "input") &&
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gegl_node_has_pad (image_map->operation, "output"))
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{
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/* if there are input and output pads we probably have a
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* filter OP, connect it on both ends.
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*/
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gegl_node_link_many (image_map->input,
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image_map->translate,
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image_map->operation,
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image_map->output,
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NULL);
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}
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else if (gegl_node_has_pad (image_map->operation, "output"))
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{
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/* if there is only an output pad we probably have a
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* source OP, blend its result on top of the original
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* pixels.
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*/
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GeglNode *over = gegl_node_new_child (image_map->gegl,
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"operation", "gegl:over",
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NULL);
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gegl_node_link_many (image_map->input,
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image_map->translate,
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over,
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image_map->output,
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NULL);
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gegl_node_connect_to (image_map->operation, "output",
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over, "aux");
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}
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else
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{
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/* otherwise we just construct a silly nop pipleline
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*/
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gegl_node_link_many (image_map->input,
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image_map->translate,
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image_map->output,
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NULL);
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}
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}
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gegl_node_set (image_map->input,
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"buffer", input_buffer,
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NULL);
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gegl_node_set (image_map->translate,
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"x", (gdouble) rect.x,
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"y", (gdouble) rect.y,
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NULL);
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gegl_node_set (image_map->output,
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"buffer", output_buffer,
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NULL);
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image_map->processor = gegl_node_new_processor (image_map->output, &rect);
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if (image_map->timer)
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{
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image_map->pixel_count = 0;
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g_timer_start (image_map->timer);
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g_timer_stop (image_map->timer);
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}
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/* Start the intermittant work procedure */
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image_map->idle_id = g_idle_add ((GSourceFunc) gimp_image_map_do, image_map);
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}
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void
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gimp_image_map_commit (GimpImageMap *image_map)
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{
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g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
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if (image_map->idle_id)
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{
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g_source_remove (image_map->idle_id);
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image_map->idle_id = 0;
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|
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/* Finish the changes */
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while (gimp_image_map_do (image_map));
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}
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/* Make sure the drawable is still valid */
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if (! gimp_item_is_attached (GIMP_ITEM (image_map->drawable)))
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return;
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|
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/* Register an undo step */
|
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if (image_map->undo_buffer)
|
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{
|
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gint x = image_map->undo_offset_x;
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gint y = image_map->undo_offset_y;
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gint width = gegl_buffer_get_width (image_map->undo_buffer);
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gint height = gegl_buffer_get_height (image_map->undo_buffer);
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gimp_drawable_push_undo (image_map->drawable,
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image_map->undo_desc,
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image_map->undo_buffer,
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x, y, width, height);
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|
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g_object_unref (image_map->undo_buffer);
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image_map->undo_buffer = NULL;
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}
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}
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void
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gimp_image_map_clear (GimpImageMap *image_map)
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{
|
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g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
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gimp_image_map_stop_idle (image_map);
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/* Make sure the drawable is still valid */
|
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if (! gimp_item_is_attached (GIMP_ITEM (image_map->drawable)))
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return;
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|
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/* restore the original image */
|
|
if (image_map->undo_buffer)
|
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{
|
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if (gegl_buffer_get_format (image_map->undo_buffer) !=
|
|
gimp_drawable_get_format (image_map->drawable))
|
|
{
|
|
g_message ("image depth change, unable to restore original image");
|
|
}
|
|
else
|
|
{
|
|
gint x = image_map->undo_offset_x;
|
|
gint y = image_map->undo_offset_y;
|
|
gint width = gegl_buffer_get_width (image_map->undo_buffer);
|
|
gint height = gegl_buffer_get_height (image_map->undo_buffer);
|
|
|
|
gegl_buffer_copy (image_map->undo_buffer,
|
|
GEGL_RECTANGLE (0, 0, width, height),
|
|
gimp_drawable_get_buffer (image_map->drawable),
|
|
GEGL_RECTANGLE (x, y, width, height));
|
|
|
|
gimp_drawable_update (image_map->drawable, x, y, width, height);
|
|
}
|
|
|
|
g_object_unref (image_map->undo_buffer);
|
|
image_map->undo_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_image_map_abort (GimpImageMap *image_map)
|
|
{
|
|
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
|
|
|
|
gimp_image_map_stop_idle (image_map);
|
|
|
|
if (! gimp_item_is_attached (GIMP_ITEM (image_map->drawable)))
|
|
return;
|
|
|
|
gimp_image_map_clear (image_map);
|
|
}
|
|
|
|
|
|
/* private functions */
|
|
|
|
static void
|
|
gimp_image_map_update_undo_buffer (GimpImageMap *image_map,
|
|
const GeglRectangle *rect)
|
|
{
|
|
gint undo_offset_x;
|
|
gint undo_offset_y;
|
|
gint undo_width;
|
|
gint undo_height;
|
|
|
|
if (image_map->undo_buffer)
|
|
{
|
|
undo_offset_x = image_map->undo_offset_x;
|
|
undo_offset_y = image_map->undo_offset_y;
|
|
undo_width = gegl_buffer_get_width (image_map->undo_buffer);
|
|
undo_height = gegl_buffer_get_height (image_map->undo_buffer);
|
|
}
|
|
else
|
|
{
|
|
undo_offset_x = 0;
|
|
undo_offset_y = 0;
|
|
undo_width = 0;
|
|
undo_height = 0;
|
|
}
|
|
|
|
if (! image_map->undo_buffer ||
|
|
undo_offset_x != rect->x ||
|
|
undo_offset_y != rect->y ||
|
|
undo_width != rect->width ||
|
|
undo_height != rect->height)
|
|
{
|
|
/* If either the extents changed or the tiles don't exist,
|
|
* allocate new
|
|
*/
|
|
if (! image_map->undo_buffer ||
|
|
undo_width != rect->width ||
|
|
undo_height != rect->height)
|
|
{
|
|
/* Destroy old tiles */
|
|
if (image_map->undo_buffer)
|
|
g_object_unref (image_map->undo_buffer);
|
|
|
|
/* Allocate new tiles */
|
|
image_map->undo_buffer =
|
|
gimp_gegl_buffer_new (GEGL_RECTANGLE (0, 0,
|
|
rect->width, rect->height),
|
|
gimp_drawable_get_format (image_map->drawable));
|
|
}
|
|
|
|
/* Copy from the image to the new tiles */
|
|
gegl_buffer_copy (gimp_drawable_get_buffer (image_map->drawable),
|
|
rect,
|
|
image_map->undo_buffer,
|
|
GEGL_RECTANGLE (0, 0, 0, 0));
|
|
|
|
/* Set the offsets */
|
|
image_map->undo_offset_x = rect->x;
|
|
image_map->undo_offset_y = rect->y;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gimp_image_map_do (GimpImageMap *image_map)
|
|
{
|
|
gboolean pending;
|
|
|
|
if (! gimp_item_is_attached (GIMP_ITEM (image_map->drawable)))
|
|
{
|
|
image_map->idle_id = 0;
|
|
|
|
if (image_map->processor)
|
|
{
|
|
g_object_unref (image_map->processor);
|
|
image_map->processor = NULL;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
if (image_map->timer)
|
|
g_timer_continue (image_map->timer);
|
|
|
|
pending = gegl_processor_work (image_map->processor, NULL);
|
|
|
|
if (image_map->timer)
|
|
g_timer_stop (image_map->timer);
|
|
|
|
if (! pending)
|
|
{
|
|
if (image_map->timer)
|
|
g_printerr ("%s: %g MPixels/sec\n",
|
|
image_map->undo_desc,
|
|
(gdouble) image_map->pixel_count /
|
|
(1000000.0 *
|
|
g_timer_elapsed (image_map->timer, NULL)));
|
|
|
|
g_object_unref (image_map->processor);
|
|
image_map->processor = NULL;
|
|
|
|
image_map->idle_id = 0;
|
|
|
|
g_signal_emit (image_map, image_map_signals[FLUSH], 0);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
g_signal_emit (image_map, image_map_signals[FLUSH], 0);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gimp_image_map_data_written (GObject *operation,
|
|
const GeglRectangle *extent,
|
|
GimpImageMap *image_map)
|
|
{
|
|
GimpImage *image = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
|
|
|
|
if (! gimp_channel_is_empty (gimp_image_get_mask (image)))
|
|
{
|
|
/* Reset to initial drawable conditions. */
|
|
|
|
gegl_buffer_copy (image_map->undo_buffer,
|
|
GEGL_RECTANGLE (extent->x - image_map->undo_offset_x,
|
|
extent->y - image_map->undo_offset_y,
|
|
extent->width, extent->height),
|
|
gimp_drawable_get_buffer (image_map->drawable),
|
|
GEGL_RECTANGLE (extent->x, extent->y, 0, 0));
|
|
}
|
|
|
|
/* Apply the result of the gegl graph. */
|
|
gimp_drawable_apply_buffer (image_map->drawable,
|
|
gimp_drawable_get_shadow_buffer (image_map->drawable),
|
|
GEGL_RECTANGLE (extent->x, extent->y,
|
|
extent->width, extent->height),
|
|
FALSE, NULL,
|
|
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
|
|
NULL, extent->x, extent->y,
|
|
NULL, extent->x, extent->y);
|
|
|
|
gimp_drawable_update (image_map->drawable,
|
|
extent->x, extent->y,
|
|
extent->width, extent->height);
|
|
|
|
if (image_map->timer)
|
|
image_map->pixel_count += extent->width * extent->height;
|
|
}
|
|
|
|
static void
|
|
gimp_image_map_stop_idle (GimpImageMap *image_map)
|
|
{
|
|
if (image_map->idle_id)
|
|
{
|
|
g_source_remove (image_map->idle_id);
|
|
image_map->idle_id = 0;
|
|
|
|
if (image_map->processor)
|
|
{
|
|
g_object_unref (image_map->processor);
|
|
image_map->processor = NULL;
|
|
}
|
|
}
|
|
}
|