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 "SkBitmap.h"
10 #include "SkCodec.h"
11 #include "SkData.h"
12 #include "SkImageInfo.h"
13 #include "SkMakeUnique.h"
14 #include "SkRefCnt.h"
15 #include "SkStream.h"
16 #include "SkTemplates.h"
17 #include "Test.h"
18
19 #include <cstring>
20 #include <memory>
21 #include <utility>
22
23 namespace {
24 // This class wraps another SkStream. It does not own the underlying stream, so
25 // that the underlying stream can be reused starting from where the first
26 // client left off. This mimics Android's JavaInputStreamAdaptor.
27 class UnowningStream : public SkStream {
28 public:
UnowningStream(SkStream * stream)29 explicit UnowningStream(SkStream* stream)
30 : fStream(stream)
31 {}
32
read(void * buf,size_t bytes)33 size_t read(void* buf, size_t bytes) override {
34 return fStream->read(buf, bytes);
35 }
36
rewind()37 bool rewind() override {
38 return fStream->rewind();
39 }
40
isAtEnd() const41 bool isAtEnd() const override {
42 return fStream->isAtEnd();
43 }
44 private:
45 SkStream* fStream; // Unowned.
46 };
47 } // namespace
48
49 // Test that some SkCodecs do not attempt to read input beyond the logical
50 // end of the data. Some other SkCodecs do, but some Android apps rely on not
51 // doing so for PNGs. Test on other formats that work.
DEF_TEST(Codec_end,r)52 DEF_TEST(Codec_end, r) {
53 for (const char* path : { "images/plane.png",
54 "images/yellow_rose.png",
55 "images/plane_interlaced.png",
56 "images/google_chrome.ico",
57 "images/color_wheel.ico",
58 "images/mandrill.wbmp",
59 "images/randPixels.bmp",
60 }) {
61 sk_sp<SkData> data = GetResourceAsData(path);
62 if (!data) {
63 continue;
64 }
65
66 const int kNumImages = 2;
67 const size_t size = data->size();
68 sk_sp<SkData> multiData = SkData::MakeUninitialized(size * kNumImages);
69 void* dst = multiData->writable_data();
70 for (int i = 0; i < kNumImages; i++) {
71 memcpy(SkTAddOffset<void>(dst, size * i), data->data(), size);
72 }
73 data.reset();
74
75 SkMemoryStream stream(std::move(multiData));
76 for (int i = 0; i < kNumImages; ++i) {
77 std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
78 skstd::make_unique<UnowningStream>(&stream)));
79 if (!codec) {
80 ERRORF(r, "Failed to create a codec from %s, iteration %i", path, i);
81 continue;
82 }
83
84 auto info = codec->getInfo().makeColorType(kN32_SkColorType);
85 SkBitmap bm;
86 bm.allocPixels(info);
87
88 auto result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes());
89 if (result != SkCodec::kSuccess) {
90 ERRORF(r, "Failed to getPixels from %s, iteration %i error %i", path, i, result);
91 continue;
92 }
93 }
94 }
95 }
96
