1 // Copyright 2020 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <stdint.h>
16 #include <gdk-pixbuf/gdk-pixbuf.h>
17
18 #include "fuzzer_temp_file.h"
19
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)20 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
21 if (size < 1) {
22 return 0;
23 }
24 GdkPixbuf *pixbuf;
25 GError *error = NULL;
26
27 char *tmpfile = fuzzer_get_tmpfile(data, size);
28 pixbuf = gdk_pixbuf_new_from_file(tmpfile, &error);
29 if (error != NULL) {
30 g_clear_error(&error);
31 fuzzer_release_tmpfile(tmpfile);
32 return 0;
33 }
34
35 char *buf = (char *) calloc(size + 1, sizeof(char));
36 memcpy(buf, data, size);
37 buf[size] = '\0';
38
39 gdk_pixbuf_get_width(pixbuf);
40 gdk_pixbuf_get_height(pixbuf);
41 gdk_pixbuf_get_bits_per_sample(pixbuf);
42 gdk_pixbuf_scale(pixbuf, pixbuf,
43 0, 0,
44 gdk_pixbuf_get_width(pixbuf) / 4,
45 gdk_pixbuf_get_height(pixbuf) / 4,
46 0, 0, 0.5, 0.5,
47 GDK_INTERP_NEAREST);
48 unsigned int rot_amount = ((unsigned int) data[0]) % 4;
49 pixbuf = gdk_pixbuf_rotate_simple(pixbuf, rot_amount * 90);
50 gdk_pixbuf_set_option(pixbuf, buf, buf);
51 gdk_pixbuf_get_option(pixbuf, buf);
52
53 free(buf);
54 g_clear_object(&pixbuf);
55 fuzzer_release_tmpfile(tmpfile);
56 return 0;
57 }
58