2770cce833
in gimp:offset filter. Since gimp:offset is now an NDE filter, always loading the background color from context causes the color to change each time the filter is redrawn. This is inconsistent behavior. This patch replaces the GimpContext parameter with GeglColor, and updates gimp_drawable_offset and related functions to set the color directly. The libgimp version loads the background color from context and passes it on since the API is now frozen.
486 lines
17 KiB
C
486 lines
17 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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* gimpoperationoffset.c
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* Copyright (C) 2019 Ell
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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 <gegl-plugin.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "operations-types.h"
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#include "gegl/gimp-gegl-loops.h"
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#include "gegl/gimp-gegl-utils.h"
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#include "core/gimpcontext.h"
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#include "gimpoperationoffset.h"
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#include "gimp-intl.h"
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enum
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{
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PROP_0,
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PROP_COLOR,
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PROP_TYPE,
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PROP_X,
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PROP_Y
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};
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static void gimp_operation_offset_dispose (GObject *object);
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static void gimp_operation_offset_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_operation_offset_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static GeglRectangle gimp_operation_offset_get_required_for_output (GeglOperation *operation,
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const gchar *input_pad,
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const GeglRectangle *output_roi);
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static GeglRectangle gimp_operation_offset_get_invalidated_by_change (GeglOperation *operation,
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const gchar *input_pad,
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const GeglRectangle *input_roi);
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static void gimp_operation_offset_prepare (GeglOperation *operation);
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static gboolean gimp_operation_offset_parent_process (GeglOperation *operation,
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GeglOperationContext *context,
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const gchar *output_pad,
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const GeglRectangle *result,
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gint level);
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static gboolean gimp_operation_offset_process (GeglOperation *operation,
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GeglBuffer *input,
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GeglBuffer *output,
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const GeglRectangle *roi,
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gint level);
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static void gimp_operation_offset_get_offset (GimpOperationOffset *offset,
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gboolean invert,
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gint *x,
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gint *y);
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static void gimp_operation_offset_get_rect (GimpOperationOffset *offset,
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gboolean invert,
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const GeglRectangle *roi,
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GeglRectangle *rect);
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G_DEFINE_TYPE (GimpOperationOffset, gimp_operation_offset,
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GEGL_TYPE_OPERATION_FILTER)
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#define parent_class gimp_operation_offset_parent_class
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static void
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gimp_operation_offset_class_init (GimpOperationOffsetClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
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GeglOperationFilterClass *filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
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object_class->dispose = gimp_operation_offset_dispose;
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object_class->set_property = gimp_operation_offset_set_property;
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object_class->get_property = gimp_operation_offset_get_property;
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operation_class->get_required_for_output = gimp_operation_offset_get_required_for_output;
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operation_class->get_invalidated_by_change = gimp_operation_offset_get_invalidated_by_change;
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operation_class->prepare = gimp_operation_offset_prepare;
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operation_class->process = gimp_operation_offset_parent_process;
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operation_class->threaded = FALSE;
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operation_class->cache_policy = GEGL_CACHE_POLICY_NEVER;
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filter_class->process = gimp_operation_offset_process;
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gegl_operation_class_set_keys (operation_class,
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"name", "gimp:offset",
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"categories", "transform",
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"description", _("Shift the pixels, optionally wrapping them at the borders"),
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NULL);
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g_object_class_install_property (object_class, PROP_COLOR,
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gimp_param_spec_color_from_string ("color",
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_("Fill Color"),
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_("Fill Color"),
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FALSE, "white",
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_TYPE,
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g_param_spec_enum ("type",
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"Type",
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"Offset type",
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GIMP_TYPE_OFFSET_TYPE,
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GIMP_OFFSET_WRAP_AROUND,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_X,
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g_param_spec_int ("x",
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"X Offset",
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"X offset",
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G_MININT, G_MAXINT, 0,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_Y,
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g_param_spec_int ("y",
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"Y Offset",
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"Y offset",
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G_MININT, G_MAXINT, 0,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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gimp_operation_offset_init (GimpOperationOffset *self)
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{
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}
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static void
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gimp_operation_offset_dispose (GObject *object)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (object);
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g_object_unref (offset->color);
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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_operation_offset_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (object);
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switch (property_id)
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{
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case PROP_COLOR:
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g_value_set_object (value, offset->color);
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break;
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case PROP_TYPE:
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g_value_set_enum (value, offset->type);
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break;
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case PROP_X:
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g_value_set_int (value, offset->x);
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break;
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case PROP_Y:
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g_value_set_int (value, offset->y);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_operation_offset_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (object);
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switch (property_id)
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{
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case PROP_COLOR:
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g_clear_object (&offset->color);
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offset->color = gegl_color_duplicate (g_value_get_object (value));
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break;
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case PROP_TYPE:
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offset->type = g_value_get_enum (value);
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break;
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case PROP_X:
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offset->x = g_value_get_int (value);
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break;
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case PROP_Y:
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offset->y = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static GeglRectangle
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gimp_operation_offset_get_required_for_output (GeglOperation *operation,
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const gchar *input_pad,
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const GeglRectangle *output_roi)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (operation);
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GeglRectangle rect;
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gimp_operation_offset_get_rect (offset, TRUE, output_roi, &rect);
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return rect;
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}
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static GeglRectangle
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gimp_operation_offset_get_invalidated_by_change (GeglOperation *operation,
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const gchar *input_pad,
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const GeglRectangle *input_roi)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (operation);
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GeglRectangle rect;
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gimp_operation_offset_get_rect (offset, FALSE, input_roi, &rect);
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return rect;
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}
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static void
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gimp_operation_offset_prepare (GeglOperation *operation)
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{
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const Babl *format;
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format = gegl_operation_get_source_format (operation, "input");
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if (! format)
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format = babl_format ("RGBA float");
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gegl_operation_set_format (operation, "input", format);
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gegl_operation_set_format (operation, "output", format);
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}
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static gboolean
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gimp_operation_offset_parent_process (GeglOperation *operation,
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GeglOperationContext *context,
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const gchar *output_pad,
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const GeglRectangle *result,
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gint level)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (operation);
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GObject *input;
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gint x;
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gint y;
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input = gegl_operation_context_get_object (context, "input");
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gimp_operation_offset_get_offset (offset, FALSE, &x, &y);
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if (x == 0 && y == 0)
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{
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gegl_operation_context_set_object (context, "output", input);
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return TRUE;
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}
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else if (offset->type == GIMP_OFFSET_TRANSPARENT)
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{
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GObject *output = NULL;
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if (input)
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{
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GeglRectangle bounds;
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GeglRectangle extent;
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bounds = gegl_operation_get_bounding_box (GEGL_OPERATION (offset));
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extent = *gegl_buffer_get_extent (GEGL_BUFFER (input));
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extent.x += x;
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extent.y += y;
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if (gegl_rectangle_intersect (&extent, &extent, &bounds))
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{
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output = g_object_new (GEGL_TYPE_BUFFER,
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"source", input,
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"x", extent.x,
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"y", extent.y,
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"width", extent.width,
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"height", extent.height,
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"shift-x", -x,
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"shift-y", -y,
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NULL);
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if (gegl_object_get_has_forked (input))
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gegl_object_set_has_forked (output);
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}
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}
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gegl_operation_context_take_object (context, "output", output);
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return TRUE;
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}
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return GEGL_OPERATION_CLASS (parent_class)->process (operation, context,
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output_pad, result,
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level);
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}
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static gboolean
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gimp_operation_offset_process (GeglOperation *operation,
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GeglBuffer *input,
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GeglBuffer *output,
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const GeglRectangle *roi,
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gint level)
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{
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GimpOperationOffset *offset = GIMP_OPERATION_OFFSET (operation);
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GeglRectangle bounds;
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gint x;
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gint y;
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gint i;
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bounds = gegl_operation_get_bounding_box (GEGL_OPERATION (offset));
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gimp_operation_offset_get_offset (offset, FALSE, &x, &y);
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for (i = 0; i < 4; i++)
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{
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GeglRectangle offset_bounds = bounds;
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gint offset_x = x;
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gint offset_y = y;
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if (i & 1)
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offset_x += x < 0 ? bounds.width : -bounds.width;
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if (i & 2)
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offset_y += y < 0 ? bounds.height : -bounds.height;
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offset_bounds.x += offset_x;
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offset_bounds.y += offset_y;
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if (gegl_rectangle_intersect (&offset_bounds, &offset_bounds, roi))
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{
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if (i == 0 || offset->type == GIMP_OFFSET_WRAP_AROUND)
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{
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GeglRectangle offset_roi = offset_bounds;
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offset_roi.x -= offset_x;
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offset_roi.y -= offset_y;
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gimp_gegl_buffer_copy (input, &offset_roi, GEGL_ABYSS_NONE,
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output, &offset_bounds);
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}
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else if (offset->color)
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{
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gegl_buffer_set_color (output, &offset_bounds, offset->color);
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}
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}
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}
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return TRUE;
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}
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static void
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gimp_operation_offset_get_offset (GimpOperationOffset *offset,
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gboolean invert,
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gint *x,
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gint *y)
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{
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GeglRectangle bounds;
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bounds = gegl_operation_get_bounding_box (GEGL_OPERATION (offset));
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if (gegl_rectangle_is_empty (&bounds))
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{
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*x = 0;
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*y = 0;
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return;
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}
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*x = offset->x;
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*y = offset->y;
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if (invert)
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{
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*x = -*x;
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*y = -*y;
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}
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if (offset->type == GIMP_OFFSET_WRAP_AROUND)
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{
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*x %= bounds.width;
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if (*x < 0)
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*x += bounds.width;
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*y %= bounds.height;
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if (*y < 0)
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*y += bounds.height;
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}
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else
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{
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*x = CLAMP (*x, -bounds.width, +bounds.width);
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*y = CLAMP (*y, -bounds.height, +bounds.height);
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}
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}
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static void
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gimp_operation_offset_get_rect (GimpOperationOffset *offset,
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gboolean invert,
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const GeglRectangle *roi,
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GeglRectangle *rect)
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{
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GeglRectangle bounds;
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gint x;
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gint y;
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bounds = gegl_operation_get_bounding_box (GEGL_OPERATION (offset));
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if (gegl_rectangle_is_empty (&bounds))
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{
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rect->x = 0;
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rect->y = 0;
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rect->width = 0;
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rect->height = 0;
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return;
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}
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gimp_operation_offset_get_offset (offset, invert, &x, &y);
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*rect = *roi;
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rect->x += x;
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rect->y += y;
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if (offset->type == GIMP_OFFSET_WRAP_AROUND)
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{
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if (rect->x + rect->width > bounds.x + bounds.width)
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{
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rect->x = bounds.x;
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rect->width = bounds.width;
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}
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if (rect->y + rect->height > bounds.y + bounds.height)
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{
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rect->y = bounds.y;
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rect->height = bounds.height;
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}
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}
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gegl_rectangle_intersect (rect, rect, &bounds);
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}
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