mirror of https://github.com/GNOME/gimp.git
154 lines
3.5 KiB
C
154 lines
3.5 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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* gimpcanvasitem-utils.c
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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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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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "display-types.h"
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#include "gimpcanvasitem-utils.h"
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void
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gimp_canvas_item_shift_to_north_west (GimpHandleAnchor anchor,
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gdouble x,
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gdouble y,
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gint width,
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gint height,
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gdouble *shifted_x,
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gdouble *shifted_y)
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{
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switch (anchor)
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{
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case GIMP_HANDLE_ANCHOR_CENTER:
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x -= width / 2;
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y -= height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_NORTH:
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x -= width / 2;
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break;
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case GIMP_HANDLE_ANCHOR_NORTH_WEST:
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/* nothing, this is the default */
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break;
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case GIMP_HANDLE_ANCHOR_NORTH_EAST:
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x -= width;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH:
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x -= width / 2;
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y -= height;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH_WEST:
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y -= height;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH_EAST:
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x -= width;
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y -= height;
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break;
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case GIMP_HANDLE_ANCHOR_WEST:
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y -= height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_EAST:
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x -= width;
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y -= height / 2;
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break;
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default:
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break;
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}
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if (shifted_x)
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*shifted_x = x;
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if (shifted_y)
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*shifted_y = y;
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}
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void
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gimp_canvas_item_shift_to_center (GimpHandleAnchor anchor,
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gdouble x,
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gdouble y,
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gint width,
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gint height,
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gdouble *shifted_x,
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gdouble *shifted_y)
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{
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switch (anchor)
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{
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case GIMP_HANDLE_ANCHOR_CENTER:
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/* nothing, this is the default */
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break;
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case GIMP_HANDLE_ANCHOR_NORTH:
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y += height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_NORTH_WEST:
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x += width / 2;
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y += height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_NORTH_EAST:
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x -= width / 2;
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y += height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH:
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y -= height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH_WEST:
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x += width / 2;
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y -= height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_SOUTH_EAST:
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x -= width / 2;
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y -= height / 2;
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break;
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case GIMP_HANDLE_ANCHOR_WEST:
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x += width / 2;
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break;
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case GIMP_HANDLE_ANCHOR_EAST:
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x -= width / 2;
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break;
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default:
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break;
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}
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if (shifted_x)
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*shifted_x = x;
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if (shifted_y)
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*shifted_y = y;
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}
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