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Checked in graphics context.

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This commit is contained in:
Robert Osfield
2005-07-21 08:43:24 +00:00
parent 1e9fb4ab03
commit 7776924407
2 changed files with 193 additions and 0 deletions
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include/osg/GraphicsContext Normal file
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_GRAPHICSCONTEXT
#define OSG_GRAPHICSCONTEXT 1
#include <osg/State>
#include <OpenThreads/Thread>
namespace osg {
class OSG_EXPORT GraphicsContext : public Referenced
{
public:
struct Traits : public osg::Referenced
{
Traits():
_displayNum(0),
_screenNum(0),
_x(0),
_y(0),
_width(0),
_height(0),
_windowDecoration(false),
_supportsResize(false),
_red(8),
_blue(8),
_green(8),
_alpha(0),
_depth(24),
_stencil(0),
_pbuffer(false),
_quadBufferStereo(false),
_doubleBuffer(false),
_target(0),
_level(0),
_face(0),
_sharedContext() {}
// where graphic context is be hosted.
std::string _hostName;
unsigned int _displayNum;
unsigned int _screenNum;
// graphics context orginal and size
unsigned int _x;
unsigned int _y;
unsigned int _width;
unsigned int _height;
// window decoration and baviour
std::string _windowName;
bool _windowDecoration;
bool _supportsResize;
// buffer depths, 0 equals off.
unsigned int _red;
unsigned int _blue;
unsigned int _green;
unsigned int _alpha;
unsigned int _depth;
unsigned int _stencil;
// buffer configuration
bool _pbuffer;
bool _quadBufferStereo;
bool _doubleBuffer;
// render to texture
GLenum _target;
unsigned int _level;
unsigned int _face;
// shared context
GraphicsContext* _sharedContext;
};
struct CreateGraphicContexCallback : public osg::Referenced
{
virtual GraphicsContext* createGraphicsContext(Traits* traits) = 0;
virtual ~CreateGraphicContexCallback() {};
};
static void setCreateGraphicsContextCallback(CreateGraphicContexCallback* callback);
static CreateGraphicContexCallback* getCreateGraphicsContextCallback();
static GraphicsContext* createGraphicsContext(Traits* traits);
public:
/** Get the traits of the GraphicsContext.*/
inline const Traits* getTraits() const { return _traits.get(); }
/** Set the State object which tracks the current OpenGL state for this graphics context.*/
inline void setState(State* state) { _state = state; }
/** Get the State object which tracks the current OpenGL state for this graphics context.*/
inline State* getState() { return _state.get(); }
/** Get the const State object which tracks the current OpenGL state for this graphics context.*/
inline const State* getState() const { return _state.get(); }
/** Return true if the current thread has this OpenGL graphics context.*/
inline bool isCurrent() const { return _threadOfLastMakeCurrent == OpenThreads::Thread::CurrentThread(); }
/** Make this graphics context current.*/
virtual void makeCurrent() = 0;
/** Make this graphics context current with specified read context.*/
virtual void makeCurrentContext(GraphicsContext* readContext) = 0;
/** Release the graphics context.*/
virtual void release() = 0;
/** Bind the graphics context to associated texture.*/
virtual void bindPBufferToTexture(GLenum buffer) = 0;
protected:
GraphicsContext();
virtual ~GraphicsContext() {}
ref_ptr<Traits> _traits;
ref_ptr<State> _state;
OpenThreads::Thread* _threadOfLastMakeCurrent;
};
}
#endif

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src/osg/GraphicsContext.cpp Normal file
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include <osg/GraphicsContext>
using namespace osg;
static ref_ptr<GraphicsContext::CreateGraphicContexCallback> s_createGraphicsContextCallback;
void GraphicsContext::setCreateGraphicsContextCallback(CreateGraphicContexCallback* callback)
{
s_createGraphicsContextCallback = callback;
}
GraphicsContext::CreateGraphicContexCallback* GraphicsContext::getCreateGraphicsContextCallback()
{
return s_createGraphicsContextCallback.get();
}
GraphicsContext* GraphicsContext::createGraphicsContext(Traits* traits)
{
if (s_createGraphicsContextCallback.valid())
return s_createGraphicsContextCallback->createGraphicsContext(traits);
else
return 0;
}
GraphicsContext::GraphicsContext():
_threadOfLastMakeCurrent(0)
{
}