1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#include "screencapture.hpp"
#include <components/debug/debuglog.hpp>
#include <components/files/conversion.hpp>
#include <components/sceneutil/workqueue.hpp>
#include <osg/Image>
#include <osg/ref_ptr>
#include <osgDB/ReaderWriter>
#include <osgDB/Registry>
#include <atomic>
#include <cassert>
#include <filesystem>
#include <fstream>
#include <iomanip>
#include <sstream>
#include <string>
namespace
{
class ScreenCaptureWorkItem : public SceneUtil::WorkItem
{
public:
ScreenCaptureWorkItem(const osg::ref_ptr<osgViewer::ScreenCaptureHandler::CaptureOperation>& impl,
const osg::Image& image, unsigned int contextId)
: mImpl(impl)
, mImage(new osg::Image(image))
, mContextId(contextId)
{
assert(mImpl != nullptr);
}
void doWork() override
{
if (mAborted)
return;
try
{
(*mImpl)(*mImage, mContextId);
}
catch (const std::exception& e)
{
Log(Debug::Error) << "ScreenCaptureWorkItem exception: " << e.what();
}
}
void abort() override { mAborted = true; }
private:
const osg::ref_ptr<osgViewer::ScreenCaptureHandler::CaptureOperation> mImpl;
const osg::ref_ptr<const osg::Image> mImage;
const unsigned int mContextId;
std::atomic_bool mAborted{ false };
};
}
namespace SceneUtil
{
std::filesystem::path writeScreenshotToFile(
const std::filesystem::path& screenshotPath, const std::string& screenshotFormat, const osg::Image& image)
{
// Count screenshots.
int shotCount = 0;
// Find the first unused filename with a do-while
std::ostringstream stream;
std::string lastFileName;
std::filesystem::path lastFilePath;
do
{
// Reset the stream
stream.str("");
stream.clear();
stream << "screenshot" << std::setw(3) << std::setfill('0') << shotCount++ << "." << screenshotFormat;
lastFileName = stream.str();
lastFilePath = screenshotPath / lastFileName;
} while (std::filesystem::exists(lastFilePath));
std::ofstream outStream;
outStream.open(lastFilePath, std::ios::binary);
osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension(screenshotFormat);
if (!readerwriter)
{
Log(Debug::Error) << "Error: Can't write screenshot, no '" << screenshotFormat << "' readerwriter found";
return std::string();
}
osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(image, outStream);
if (!result.success())
{
Log(Debug::Error) << "Error: Can't write screenshot: " << result.message() << " code " << result.status();
return std::string();
}
return lastFileName;
}
WriteScreenshotToFileOperation::WriteScreenshotToFileOperation(const std::filesystem::path& screenshotPath,
const std::string& screenshotFormat, std::function<void(std::string)> callback)
: mScreenshotPath(screenshotPath)
, mScreenshotFormat(screenshotFormat)
, mCallback(std::move(callback))
{
}
void WriteScreenshotToFileOperation::operator()(const osg::Image& image, const unsigned int /*context_id*/)
{
std::filesystem::path fileName;
try
{
fileName = writeScreenshotToFile(mScreenshotPath, mScreenshotFormat, image);
}
catch (const std::exception& e)
{
Log(Debug::Error) << "Failed to write screenshot to file with path=\"" << mScreenshotPath << "\", format=\""
<< mScreenshotFormat << "\": " << e.what();
}
if (fileName.empty())
mCallback(std::string());
else
{
mCallback(Files::pathToUnicodeString(fileName));
Log(Debug::Info) << mScreenshotPath / fileName << " has been saved";
}
}
AsyncScreenCaptureOperation::AsyncScreenCaptureOperation(
osg::ref_ptr<WorkQueue> queue, osg::ref_ptr<CaptureOperation> impl)
: mQueue(std::move(queue))
, mImpl(std::move(impl))
{
assert(mQueue != nullptr);
assert(mImpl != nullptr);
}
AsyncScreenCaptureOperation::~AsyncScreenCaptureOperation()
{
stop();
}
void AsyncScreenCaptureOperation::stop()
{
for (const osg::ref_ptr<SceneUtil::WorkItem>& item : *mWorkItems.lockConst())
item->abort();
for (const osg::ref_ptr<SceneUtil::WorkItem>& item : *mWorkItems.lockConst())
item->waitTillDone();
}
void AsyncScreenCaptureOperation::operator()(const osg::Image& image, const unsigned int context_id)
{
osg::ref_ptr<SceneUtil::WorkItem> item(new ScreenCaptureWorkItem(mImpl, image, context_id));
mQueue->addWorkItem(item);
const auto isDone = [](const osg::ref_ptr<SceneUtil::WorkItem>& v) { return v->isDone(); };
const auto workItems = mWorkItems.lock();
workItems->erase(std::remove_if(workItems->begin(), workItems->end(), isDone), workItems->end());
workItems->emplace_back(std::move(item));
}
}
|
