1 // Copyright 2017 The Android Open Source Project
2 //
3 // This software is licensed under the terms of the GNU General Public
4 // License version 2, as published by the Free Software Foundation, and
5 // may be copied, distributed, and modified under those terms.
6 //
7 // This program is distributed in the hope that it will be useful,
8 // but WITHOUT ANY WARRANTY; without even the implied warranty of
9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 // GNU General Public License for more details.
11
12 #include "snapshot/TextureSaver.h"
13
14 #include "base/CompressingStream.h"
15 #include "base/System.h"
16
17 #include <algorithm>
18 #include <cassert>
19 #include <iterator>
20 #include <utility>
21
22 using android::base::CompressingStream;
23
24 namespace android {
25 namespace snapshot {
26
TextureSaver(android::base::StdioStream && stream)27 TextureSaver::TextureSaver(android::base::StdioStream&& stream)
28 : mStream(std::move(stream)) {
29 // Put a placeholder for the index offset right now.
30 mStream.putBe64(0);
31 }
32
~TextureSaver()33 TextureSaver::~TextureSaver() {
34 done();
35 }
36
saveTexture(uint32_t texId,const saver_t & saver)37 void TextureSaver::saveTexture(uint32_t texId, const saver_t& saver) {
38
39 if (!mStartTime) {
40 mStartTime = base::getHighResTimeUs();
41 }
42
43 assert(mIndex.textures.end() ==
44 std::find_if(mIndex.textures.begin(), mIndex.textures.end(),
45 [texId](FileIndex::Texture& tex) {
46 return tex.texId == texId;
47 }));
48 mIndex.textures.push_back({texId, ftello64(mStream.get())});
49
50 CompressingStream stream(mStream);
51 saver(&stream, &mBuffer);
52 }
53
done()54 void TextureSaver::done() {
55 if (mFinished) {
56 return;
57 }
58 mIndex.startPosInFile = ftello64(mStream.get());
59 writeIndex();
60 mEndTime = base::getHighResTimeUs();
61 #if SNAPSHOT_PROFILE > 1
62 printf("Texture saving time: %.03f\n",
63 (mEndTime - mStartTime) / 1000.0);
64 #endif
65 mHasError = ferror(mStream.get()) != 0;
66 mFinished = true;
67 mStream.close();
68 }
69
writeIndex()70 void TextureSaver::writeIndex() {
71 #if SNAPSHOT_PROFILE > 1
72 auto start = ftello64(mStream.get());
73 #endif
74
75 mStream.putBe32(static_cast<uint32_t>(mIndex.version));
76 mStream.putBe32(static_cast<uint32_t>(mIndex.textures.size()));
77 for (const FileIndex::Texture& b : mIndex.textures) {
78 mStream.putBe32(b.texId);
79 mStream.putBe64(static_cast<uint64_t>(b.filePos));
80 }
81 auto end = ftello64(mStream.get());
82 mDiskSize = uint64_t(end);
83 #if SNAPSHOT_PROFILE > 1
84 printf("texture: index size: %d\n", int(end - start));
85 #endif
86
87 fseeko64(mStream.get(), 0, SEEK_SET);
88 mStream.putBe64(static_cast<uint64_t>(mIndex.startPosInFile));
89 }
90
91 } // namespace snapshot
92 } // namespace android
93