58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
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/* 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 <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "xcf-utils.h"
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gboolean
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xcf_data_is_zero (const void *data,
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gint size)
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{
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const guint8 *data8;
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const guint64 *data64;
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for (data8 = data; size > 0 && (guintptr) data8 % 8 != 0; data8++, size--)
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{
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if (*data8)
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return FALSE;
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}
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for (data64 = (gpointer) data8; size >= 8; data64++, size -= 8)
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{
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if (*data64)
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return FALSE;
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}
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for (data8 = (gpointer) data64; size > 0; data8++, size--)
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{
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if (*data8)
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return FALSE;
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}
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return TRUE;
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}
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