1 /*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "Resources.h"
9 #include "Test.h"
10
11 #include "SkBitmap.h"
12 #include "SkCodec.h"
13 #include "SkData.h"
14 #include "SkMakeUnique.h"
15 #include "SkStream.h"
16
17 namespace {
18 // This class wraps another SkStream. It does not own the underlying stream, so
19 // that the underlying stream can be reused starting from where the first
20 // client left off. This mimics Android's JavaInputStreamAdaptor.
21 class UnowningStream : public SkStream {
22 public:
UnowningStream(SkStream * stream)23 explicit UnowningStream(SkStream* stream)
24 : fStream(stream)
25 {}
26
read(void * buf,size_t bytes)27 size_t read(void* buf, size_t bytes) override {
28 return fStream->read(buf, bytes);
29 }
30
rewind()31 bool rewind() override {
32 return fStream->rewind();
33 }
34
isAtEnd() const35 bool isAtEnd() const override {
36 return fStream->isAtEnd();
37 }
38 private:
39 SkStream* fStream; // Unowned.
40 };
41 } // namespace
42
43 // Test that some SkCodecs do not attempt to read input beyond the logical
44 // end of the data. Some other SkCodecs do, but some Android apps rely on not
45 // doing so for PNGs. Test on other formats that work.
DEF_TEST(Codec_end,r)46 DEF_TEST(Codec_end, r) {
47 for (const char* path : { "images/plane.png",
48 "images/yellow_rose.png",
49 "images/plane_interlaced.png",
50 "images/google_chrome.ico",
51 "images/color_wheel.ico",
52 "images/mandrill.wbmp",
53 "images/randPixels.bmp",
54 }) {
55 sk_sp<SkData> data = GetResourceAsData(path);
56 if (!data) {
57 continue;
58 }
59
60 const int kNumImages = 2;
61 const size_t size = data->size();
62 sk_sp<SkData> multiData = SkData::MakeUninitialized(size * kNumImages);
63 void* dst = multiData->writable_data();
64 for (int i = 0; i < kNumImages; i++) {
65 memcpy(SkTAddOffset<void>(dst, size * i), data->data(), size);
66 }
67 data.reset();
68
69 SkMemoryStream stream(std::move(multiData));
70 for (int i = 0; i < kNumImages; ++i) {
71 std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
72 skstd::make_unique<UnowningStream>(&stream)));
73 if (!codec) {
74 ERRORF(r, "Failed to create a codec from %s, iteration %i", path, i);
75 continue;
76 }
77
78 auto info = codec->getInfo().makeColorType(kN32_SkColorType);
79 SkBitmap bm;
80 bm.allocPixels(info);
81
82 auto result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes());
83 if (result != SkCodec::kSuccess) {
84 ERRORF(r, "Failed to getPixels from %s, iteration %i error %i", path, i, result);
85 continue;
86 }
87 }
88 }
89 }
90
