| 1 | /* GDK - The GIMP Drawing Kit |
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| 2 | * Copyright (C) 2021 Red Hat, Inc. |
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| 3 | * |
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| 4 | * This library is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * This library is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with this library. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | */ |
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| 17 | |
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| 18 | #ifndef __GDK_PNG_PRIVATE_H__ |
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| 19 | #define __GDK_PNG_PRIVATE_H__ |
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| 20 | |
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| 21 | #include "gdktexture.h" |
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| 22 | #include <gio/gio.h> |
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| 23 | |
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| 24 | #define PNG_SIGNATURE "\x89PNG" |
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| 25 | |
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| 26 | GdkTexture *gdk_load_png (GBytes *bytes, |
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| 27 | GError **error); |
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| 28 | |
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| 29 | GBytes *gdk_save_png (GdkTexture *texture); |
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| 30 | |
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| 31 | static inline gboolean |
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| 32 | gdk_is_png (GBytes *bytes) |
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| 33 | { |
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| 34 | const char *data; |
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| 35 | gsize size; |
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| 36 | |
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| 37 | data = g_bytes_get_data (bytes, size: &size); |
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| 38 | |
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| 39 | return size > strlen (PNG_SIGNATURE) && |
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| 40 | memcmp (s1: data, PNG_SIGNATURE, n: strlen (PNG_SIGNATURE)) == 0; |
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| 41 | } |
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| 42 | |
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| 43 | #endif |
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| 44 | |
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