FGFS-4.1/OpenSceneGraph
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Added option for setting whether the front or back buffer should be read using

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--front and --back command line options.
This commit is contained in:
Robert Osfield 2008-05-25 21:52:32 +00:00
parent 28fd4b07c9
commit 5664c51cf0
1 changed files with 20 additions and 18 deletions
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38
examples/osgscreencapture/osgscreencapture.cpp
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@ -52,10 +52,10 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
struct ContextData : public osg::Referenced
{
ContextData(osg::GraphicsContext* gc, Mode mode, FramePosition position, const std::string& name):
ContextData(osg::GraphicsContext* gc, Mode mode, GLenum readBuffer, const std::string& name):
_gc(gc),
_mode(mode),
_position(position),
_readBuffer(readBuffer),
_fileName(name),
_pixelFormat(GL_BGR),
_type(GL_UNSIGNED_BYTE),
@ -74,7 +74,7 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
// double buffer PBO.
switch(_mode)
{
case(READ_PIXELS):
case(READ_PIXELS):
osg::notify(osg::NOTICE)<<"Reading window usig glReadPixels, with out PixelBufferObject."<<std::endl;
break;
case(SINGLE_PBO):
@ -132,7 +132,7 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
osg::GraphicsContext* _gc;
Mode _mode;
FramePosition _position;
GLenum _readBuffer;
std::string _fileName;
GLenum _pixelFormat;
@ -147,9 +147,10 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
PBOBuffer _pboBuffer;
};
WindowCaptureCallback(Mode mode, FramePosition position):
WindowCaptureCallback(Mode mode, FramePosition position, GLenum readBuffer):
_mode(mode),
_position(position)
_position(position),
_readBuffer(readBuffer)
{
}
@ -159,7 +160,7 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
{
std::stringstream filename;
filename << "test_"<<_contextDataMap.size()<<".jpg";
return new ContextData(gc, _mode, _position, filename.str());
return new ContextData(gc, _mode, _readBuffer, filename.str());
}
ContextData* getContextData(osg::GraphicsContext* gc) const
@ -173,14 +174,7 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
virtual void operator () (osg::RenderInfo& renderInfo) const
{
if (_position==START_FRAME)
{
glReadBuffer(GL_FRONT);
}
else
{
glReadBuffer(GL_BACK);
}
glReadBuffer(_readBuffer);
osg::GraphicsContext* gc = renderInfo.getState()->getGraphicsContext();
osg::ref_ptr<ContextData> cd = getContextData(gc);
@ -191,6 +185,7 @@ class WindowCaptureCallback : public osg::Camera::DrawCallback
Mode _mode;
FramePosition _position;
GLenum _readBuffer;
mutable OpenThreads::Mutex _mutex;
mutable ContextDataMap _contextDataMap;
@ -566,14 +561,21 @@ int main(int argc, char** argv)
// add the LOD Scale handler
viewer.addEventHandler(new osgViewer::LODScaleHandler);
GLenum readBuffer = GL_BACK;
WindowCaptureCallback::FramePosition position = WindowCaptureCallback::END_FRAME;
while (arguments.read("--start-frame")) position = WindowCaptureCallback::START_FRAME;
WindowCaptureCallback::Mode mode = WindowCaptureCallback::DOUBLE_PBO;
while (arguments.read("--start-frame")) { position = WindowCaptureCallback::START_FRAME; readBuffer = GL_FRONT; }
while (arguments.read("--end-frame")) position = WindowCaptureCallback::END_FRAME;
WindowCaptureCallback::Mode mode = WindowCaptureCallback::DOUBLE_PBO;
while (arguments.read("--front")) readBuffer = GL_FRONT;
while (arguments.read("--back")) readBuffer = GL_BACK;
while (arguments.read("--no-pbo")) mode = WindowCaptureCallback::READ_PIXELS;
while (arguments.read("--single-pbo")) mode = WindowCaptureCallback::SINGLE_PBO;
while (arguments.read("--double-pbo")) mode = WindowCaptureCallback::DOUBLE_PBO;
// load the data
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
@ -602,7 +604,7 @@ int main(int argc, char** argv)
viewer.realize();
addCallbackToViewer(viewer, new WindowCaptureCallback(mode, position));
addCallbackToViewer(viewer, new WindowCaptureCallback(mode, position, readBuffer));
return viewer.run();