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OpenSceneGraph/src/osgViewer/PixelBufferWin32.cpp

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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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.
*
* Some elements of GraphicsWindowWin32 have used the Producer implementation as a reference.
* These elements are licensed under OSGPL as above, with Copyright (C) 2001-2004 Don Burns.
*/
#include <osgViewer/api/Win32/PixelBufferWin32>
#include <osgViewer/api/Win32/GraphicsWindowWin32>
#include <osg/TextureRectangle>
#include <vector>
#include <map>
#include <sstream>
#include <windowsx.h>
#ifndef WGL_ARB_pbuffer
#define WGL_ARB_pbuffer 1
DECLARE_HANDLE(HPBUFFERARB);
#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
#define WGL_PBUFFER_LARGEST_ARB 0x2033
#define WGL_PBUFFER_WIDTH_ARB 0x2034
#define WGL_PBUFFER_HEIGHT_ARB 0x2035
#define WGL_PBUFFER_LOST_ARB 0x2036
#endif
#ifndef WGL_ARB_pixel_format
#define WGL_ARB_pixel_format 1
#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
#define WGL_DRAW_TO_WINDOW_ARB 0x2001
#define WGL_DRAW_TO_BITMAP_ARB 0x2002
#define WGL_ACCELERATION_ARB 0x2003
#define WGL_NEED_PALETTE_ARB 0x2004
#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
#define WGL_SWAP_METHOD_ARB 0x2007
#define WGL_NUMBER_OVERLAYS_ARB 0x2008
#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
#define WGL_TRANSPARENT_ARB 0x200A
#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
#define WGL_SHARE_DEPTH_ARB 0x200C
#define WGL_SHARE_STENCIL_ARB 0x200D
#define WGL_SHARE_ACCUM_ARB 0x200E
#define WGL_SUPPORT_GDI_ARB 0x200F
#define WGL_SUPPORT_OPENGL_ARB 0x2010
#define WGL_DOUBLE_BUFFER_ARB 0x2011
#define WGL_STEREO_ARB 0x2012
#define WGL_PIXEL_TYPE_ARB 0x2013
#define WGL_COLOR_BITS_ARB 0x2014
#define WGL_RED_BITS_ARB 0x2015
#define WGL_RED_SHIFT_ARB 0x2016
#define WGL_GREEN_BITS_ARB 0x2017
#define WGL_GREEN_SHIFT_ARB 0x2018
#define WGL_BLUE_BITS_ARB 0x2019
#define WGL_BLUE_SHIFT_ARB 0x201A
#define WGL_ALPHA_BITS_ARB 0x201B
#define WGL_ALPHA_SHIFT_ARB 0x201C
#define WGL_ACCUM_BITS_ARB 0x201D
#define WGL_ACCUM_RED_BITS_ARB 0x201E
#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
#define WGL_DEPTH_BITS_ARB 0x2022
#define WGL_STENCIL_BITS_ARB 0x2023
#define WGL_AUX_BUFFERS_ARB 0x2024
#define WGL_NO_ACCELERATION_ARB 0x2025
#define WGL_GENERIC_ACCELERATION_ARB 0x2026
#define WGL_FULL_ACCELERATION_ARB 0x2027
#define WGL_SWAP_EXCHANGE_ARB 0x2028
#define WGL_SWAP_COPY_ARB 0x2029
#define WGL_SWAP_UNDEFINED_ARB 0x202A
#define WGL_TYPE_RGBA_ARB 0x202B
#define WGL_TYPE_COLORINDEX_ARB 0x202C
#define WGL_SAMPLE_BUFFERS_ARB 0x2041
#define WGL_SAMPLES_ARB 0x2042
#endif
#ifndef WGL_ARB_render_texture
#define WGL_ARB_render_texture 1
#define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070
#define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071
#define WGL_TEXTURE_FORMAT_ARB 0x2072
#define WGL_TEXTURE_TARGET_ARB 0x2073
#define WGL_MIPMAP_TEXTURE_ARB 0x2074
#define WGL_TEXTURE_RGB_ARB 0x2075
#define WGL_TEXTURE_RGBA_ARB 0x2076
#define WGL_NO_TEXTURE_ARB 0x2077
#define WGL_TEXTURE_CUBE_MAP_ARB 0x2078
#define WGL_TEXTURE_1D_ARB 0x2079
#define WGL_TEXTURE_2D_ARB 0x207A
#define WGL_MIPMAP_LEVEL_ARB 0x207B
#define WGL_CUBE_MAP_FACE_ARB 0x207C
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082
#define WGL_FRONT_LEFT_ARB 0x2083
#define WGL_FRONT_RIGHT_ARB 0x2084
#define WGL_BACK_LEFT_ARB 0x2085
#define WGL_BACK_RIGHT_ARB 0x2086
#define WGL_AUX0_ARB 0x2087
#define WGL_AUX1_ARB 0x2088
#define WGL_AUX2_ARB 0x2089
#define WGL_AUX3_ARB 0x208A
#define WGL_AUX4_ARB 0x208B
#define WGL_AUX5_ARB 0x208C
#define WGL_AUX6_ARB 0x208D
#define WGL_AUX7_ARB 0x208E
#define WGL_AUX8_ARB 0x208F
#define WGL_AUX9_ARB 0x2090
#endif
#ifndef WGL_NV_render_depth_texture
#define WGL_NV_render_depth_texture 1
#define WGL_BIND_TO_TEXTURE_DEPTH_NV 0x20A3
#define WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV 0x20A4
#define WGL_DEPTH_TEXTURE_FORMAT_NV 0x20A5
#define WGL_TEXTURE_DEPTH_COMPONENT_NV 0x20A6
#define WGL_DEPTH_COMPONENT_NV 0x20A7
#endif
#ifndef WGL_NV_render_texture_rectangle
#define WGL_NV_render_texture_rectangle 1
#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV 0x20A0
#define WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV 0x20A1
#define WGL_TEXTURE_RECTANGLE_NV 0x20A2
#endif
#ifndef WGL_SAMPLE_BUFFERS_ARB
#define WGL_SAMPLE_BUFFERS_ARB 0x2041
#endif
#ifndef WGL_SAMPLES_ARB
#define WGL_SAMPLES_ARB 0x2042
#endif
namespace
{
static std::string sysError()
{
DWORD stat, err = GetLastError();
LPVOID lpMsgBuf = 0;
stat = FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,\
0,NULL
);
std::ostringstream msgResult;
if ( stat > 0 && lpMsgBuf )
{
msgResult << (LPCTSTR)lpMsgBuf;
LocalFree( lpMsgBuf );
}
else
{
msgResult << "Error code " << err;
}
return msgResult.str();
}
static int __tempwnd_id = 0;
class TemporaryWindow: public osg::Referenced
{
public:
TemporaryWindow():
_handle(0),
_dc(0),
_context(0),
_instance(0)
{
create();
}
HWND getHandle() const { return _handle; }
HDC getDC() const { return _dc; }
HGLRC getContext() const { return _context; }
bool makeCurrent();
protected:
~TemporaryWindow();
TemporaryWindow(const TemporaryWindow &):
_handle(0),
_dc(0),
_context(0),
_instance(0) {}
TemporaryWindow &operator=(const TemporaryWindow &) { return *this; }
void create();
void kill();
private:
HWND _handle;
HDC _dc;
HGLRC _context;
HINSTANCE _instance;
std::string _classname;
};
void TemporaryWindow::create()
{
std::ostringstream oss;
oss << "tempwnd" << (++__tempwnd_id);
_classname = oss.str();
_instance = GetModuleHandle(0);
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wndclass.lpfnWndProc = DefWindowProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = _instance;
wndclass.hCursor = 0;
wndclass.hIcon = 0;
wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wndclass.lpszMenuName = 0;
wndclass.lpszClassName = _classname.c_str();
if (!RegisterClass(&wndclass))
return;
if (!(_handle = CreateWindowEx( 0,
_classname.c_str(),
TEXT(_classname.c_str()),
WS_POPUP,
0,
0,
100,
100,
0,
0,
_instance,
0)))
{
OSG_WARN << "PixelBufferWin32, could not create temporary window: " << sysError() << std::endl;
kill();
return;
}
if (!(_dc = GetDC(_handle)))
{
OSG_WARN << "PixelBufferWin32, could not get device context for temporary window: " << sysError() << std::endl;
kill();
return;
}
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};
int visual_id = ChoosePixelFormat(_dc, &pfd);
if (!SetPixelFormat(_dc, visual_id, &pfd))
{
OSG_WARN << "PixelBufferWin32, could not set pixel format for temporary window: " << sysError() << std::endl;
kill();
return;
}
if (!(_context = wglCreateContext(_dc)))
{
OSG_WARN << "PixelBufferWin32, could not get graphics context for temporary window: " << sysError() << std::endl;
kill();
return;
}
}
TemporaryWindow::~TemporaryWindow()
{
kill();
}
void TemporaryWindow::kill()
{
if (_context)
{
// mew 2005-05-09 commented out due to crashes.
// possible causes are unsafe destructor ordering, or context already
// deleted by window deletion; see:
// http://openscenegraph.org/pipermail/osg-users/2005-May/052753.html
//wglDeleteContext(_context);
_context = 0;
}
if (_dc)
{
ReleaseDC(_handle, _dc);
_dc = 0;
}
if (_handle)
{
DestroyWindow(_handle);
_handle = 0;
}
UnregisterClass(_classname.c_str(), _instance);
_instance = 0;
}
bool TemporaryWindow::makeCurrent()
{
bool result = wglMakeCurrent(_dc, _context) == TRUE ? true : false;
if (!result)
{
OSG_NOTICE << "PixelBufferWin32, could not make the temporary window's context active: " << sysError() << std::endl;
}
return result;
}
class WGLExtensions : public osg::Referenced
{
public:
typedef HPBUFFERARB (WINAPI * WGLCreatePBufferProc) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
typedef HDC (WINAPI * WGLGetPBufferDCProc) (HPBUFFERARB hPbuffer);
typedef int (WINAPI * WGLReleasePBufferDCProc) (HPBUFFERARB hPbuffer, HDC hDC);
typedef bool (WINAPI * WGLDestroyPBufferProc) (HPBUFFERARB hPbuffer);
typedef bool (WINAPI * WGLQueryPBufferProc) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
typedef bool (WINAPI * WGLBindTexImageProc) (HPBUFFERARB hPbuffer, int iBuffer);
typedef bool (WINAPI * WGLReleaseTexImageProc) (HPBUFFERARB hPbuffer, int iBuffer);
typedef bool (WINAPI * WGLSetPbufferAttribProc) (HPBUFFERARB hPbuffer, const int * piAttribList);
typedef bool (WINAPI * WGLChoosePixelFormatProc) (HDC, const int *, const float *, unsigned int, int *, unsigned int *);
typedef bool (WINAPI * WGLMakeContextCurrentProc) (HDC, HDC, HGLRC);
WGLCreatePBufferProc wglCreatePbufferARB;
WGLGetPBufferDCProc wglGetPbufferDCARB;
WGLReleasePBufferDCProc wglReleasePbufferDCARB;
WGLDestroyPBufferProc wglDestroyPbufferARB;
WGLQueryPBufferProc wglQueryPbufferARB;
WGLBindTexImageProc wglBindTexImageARB;
WGLReleaseTexImageProc wglReleaseTexImageARB;
WGLChoosePixelFormatProc wglChoosePixelFormatARB;
WGLMakeContextCurrentProc wglMakeContextCurrentARB;
static WGLExtensions *instance();
bool isValid();
protected:
WGLExtensions();
~WGLExtensions();
private:
static std::map<HGLRC, osg::ref_ptr<WGLExtensions> > _instances;
};
std::map<HGLRC, osg::ref_ptr<WGLExtensions> > WGLExtensions::_instances;
WGLExtensions::WGLExtensions()
{
wglCreatePbufferARB = (WGLCreatePBufferProc)wglGetProcAddress("wglCreatePbufferARB");
wglGetPbufferDCARB = (WGLGetPBufferDCProc)wglGetProcAddress("wglGetPbufferDCARB");
wglReleasePbufferDCARB = (WGLReleasePBufferDCProc)wglGetProcAddress("wglReleasePbufferDCARB");
wglDestroyPbufferARB = (WGLDestroyPBufferProc)wglGetProcAddress("wglDestroyPbufferARB");
wglQueryPbufferARB = (WGLQueryPBufferProc)wglGetProcAddress("wglQueryPbufferARB");
wglBindTexImageARB = (WGLBindTexImageProc)wglGetProcAddress("wglBindTexImageARB");
wglReleaseTexImageARB = (WGLReleaseTexImageProc)wglGetProcAddress("wglReleaseTexImageARB");
wglChoosePixelFormatARB = (WGLChoosePixelFormatProc)wglGetProcAddress("wglChoosePixelFormatARB");
wglMakeContextCurrentARB = (WGLMakeContextCurrentProc)wglGetProcAddress("wglMakeContextCurrentARB");
if (!wglMakeContextCurrentARB)
{
wglMakeContextCurrentARB = (WGLMakeContextCurrentProc)wglGetProcAddress("wglMakeContextCurrentEXT");
}
}
WGLExtensions::~WGLExtensions()
{
}
bool WGLExtensions::isValid()
{
return (wglCreatePbufferARB && wglGetPbufferDCARB && wglReleasePbufferDCARB && wglDestroyPbufferARB &&
wglQueryPbufferARB && wglChoosePixelFormatARB );
}
WGLExtensions *WGLExtensions::instance()
{
HGLRC context = wglGetCurrentContext();
// Get wgl function pointers for the current graphics context, or if there is no
// current context then use a temporary window.
if (!_instances[context])
{
if ( context == 0 )
{
osg::ref_ptr<TemporaryWindow> tempWin= new TemporaryWindow;
tempWin->makeCurrent();
_instances[HGLRC(0)] = new WGLExtensions;
}
else
{
_instances[context] = new WGLExtensions;
}
}
return _instances[context].get();
}
}
using namespace osgViewer;
PixelBufferWin32::PixelBufferWin32( osg::GraphicsContext::Traits* traits ):
_initialized(false),
_valid(false),
_realized(false),
_boundBuffer(0)
{
_traits = traits;
init();
if (valid())
{
setState( new osg::State );
getState()->setGraphicsContext( this );
if (_traits.valid() && _traits->sharedContext.valid() )
{
getState()->setContextID( _traits->sharedContext->getState()->getContextID() );
incrementContextIDUsageCount( getState()->getContextID() );
}
else
{
getState()->setContextID( osg::GraphicsContext::createNewContextID() );
}
}
}
PixelBufferWin32::~PixelBufferWin32()
{
closeImplementation();
}
void PixelBufferWin32::init()
{
if (_initialized) return;
if (!_traits) return;
if (!_traits->pbuffer) return;
WGLExtensions* wgle = WGLExtensions::instance();
if (!wgle || !wgle->isValid())
{
OSG_NOTICE << "PixelBufferWin32::init(), Error: some wgl extensions not supported" << std::endl;
return;
}
std::vector<int> fAttribList;
std::vector<int> bAttribList;
fAttribList.push_back(WGL_DRAW_TO_PBUFFER_ARB);
fAttribList.push_back(true);
fAttribList.push_back(WGL_SUPPORT_OPENGL_ARB);
fAttribList.push_back(true);
fAttribList.push_back(WGL_PIXEL_TYPE_ARB);
fAttribList.push_back(WGL_TYPE_RGBA_ARB);
bAttribList.push_back(WGL_PBUFFER_LARGEST_ARB);
bAttribList.push_back(true);
fAttribList.push_back(WGL_RED_BITS_ARB);
fAttribList.push_back(_traits->red);
fAttribList.push_back(WGL_GREEN_BITS_ARB);
fAttribList.push_back(_traits->green);
fAttribList.push_back(WGL_BLUE_BITS_ARB);
fAttribList.push_back(_traits->blue);
if (_traits->alpha)
{
fAttribList.push_back(WGL_ALPHA_BITS_ARB);
fAttribList.push_back(_traits->alpha);
}
fAttribList.push_back(WGL_DEPTH_BITS_ARB);
fAttribList.push_back(_traits->depth);
if (_traits->stencil)
{
fAttribList.push_back(WGL_STENCIL_BITS_ARB);
fAttribList.push_back(_traits->stencil);
}
if (_traits->sampleBuffers)
{
fAttribList.push_back(WGL_SAMPLE_BUFFERS_ARB);
fAttribList.push_back(_traits->sampleBuffers);
fAttribList.push_back(WGL_SAMPLES_ARB);
fAttribList.push_back(_traits->samples);
}
if (_traits->doubleBuffer)
{
fAttribList.push_back(WGL_DOUBLE_BUFFER_ARB);
fAttribList.push_back(true);
}
if (_traits->target != 0 && wgle->wglBindTexImageARB )
{
// TODO: Cube Maps
if (_traits->target == GL_TEXTURE_RECTANGLE)
{
bAttribList.push_back(WGL_TEXTURE_TARGET_ARB);
bAttribList.push_back(WGL_TEXTURE_RECTANGLE_NV);
if (_traits->alpha)
fAttribList.push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV);
else
fAttribList.push_back(WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV);
fAttribList.push_back(true);
}
else
{
bAttribList.push_back(WGL_TEXTURE_TARGET_ARB);
bAttribList.push_back(WGL_TEXTURE_2D_ARB);
if (_traits->alpha)
fAttribList.push_back(WGL_BIND_TO_TEXTURE_RGBA_ARB);
else
fAttribList.push_back(WGL_BIND_TO_TEXTURE_RGB_ARB);
fAttribList.push_back(true);
}
bAttribList.push_back(WGL_TEXTURE_FORMAT_ARB);
if (_traits->alpha)
bAttribList.push_back(WGL_TEXTURE_RGBA_ARB);
else
bAttribList.push_back(WGL_TEXTURE_RGB_ARB);
if (_traits->mipMapGeneration)
{
fAttribList.push_back(WGL_MIPMAP_TEXTURE_ARB);
fAttribList.push_back(true);
}
}
fAttribList.push_back(0);
bAttribList.push_back(0);
HDC hdc = 0;
int format;
osg::ref_ptr<TemporaryWindow> tempWin;
tempWin = new TemporaryWindow;
hdc = tempWin->getDC();
tempWin->makeCurrent();
wgle = WGLExtensions::instance();
unsigned int nformats = 0;
wgle->wglChoosePixelFormatARB(hdc, &fAttribList[0], NULL, 1, &format, &nformats);
if (nformats == 0)
{
OSG_NOTICE << "PixelBufferWin32::init(), Error: Couldn't find a suitable pixel format" << std::endl;
return;
}
_hwnd = reinterpret_cast<HWND>(wgle->wglCreatePbufferARB(hdc, format, _traits->width, _traits->height, &bAttribList[0]));
if (!_hwnd)
{
OSG_NOTICE << "PixelBufferWin32::init, wglCreatePbufferARB error: " << sysError() << std::endl;
return ;
}
_hdc = wgle->wglGetPbufferDCARB(reinterpret_cast<HPBUFFERARB>(_hwnd));
if (!_hdc)
{
OSG_NOTICE << "PixelBufferWin32::init, wglGetPbufferDCARB error: " << sysError() << std::endl;
return;
}
_hglrc = wglCreateContext(_hdc);
if (!_hglrc)
{
OSG_NOTICE << "PixelBufferWin32::init, wglCreateContext error: " << sysError() << std::endl;
return;
}
int iWidth = 0;
int iHeight = 0;
wgle->wglQueryPbufferARB(reinterpret_cast<HPBUFFERARB>(_hwnd), WGL_PBUFFER_WIDTH_ARB, &iWidth);
wgle->wglQueryPbufferARB(reinterpret_cast<HPBUFFERARB>(_hwnd), WGL_PBUFFER_HEIGHT_ARB, &iHeight);
if (_traits->width != iWidth || _traits->height != iHeight)
{
OSG_NOTICE << "PixelBufferWin32::init(), pbuffer created with different size then requsted" << std::endl;
OSG_NOTICE << "\tRequested size (" << _traits->width << "," << _traits->height << ")" << std::endl;
OSG_NOTICE << "\tPbuffer size (" << iWidth << "," << iHeight << ")" << std::endl;
_traits->width = iWidth;
_traits->height = iHeight;
}
_initialized = true;
_valid = true;
return;
}
bool PixelBufferWin32::realizeImplementation()
{
if (_realized)
{
OSG_NOTICE<<"PixelBufferWin32::realizeImplementation() Already realized"<<std::endl;
return true;
}
if (!_initialized) init();
if (!_initialized) return false;
if ( _traits->sharedContext.valid() )
{
GraphicsHandleWin32* graphicsHandleWin32 = dynamic_cast<GraphicsHandleWin32*>(_traits->sharedContext.get());
if (graphicsHandleWin32)
{
if ( !wglShareLists(graphicsHandleWin32->getWGLContext(), _hglrc) )
{
OSG_NOTICE << "PixelBufferWin32::realizeImplementation, wglShareLists error: " << sysError() << std::endl;
}
}
}
_realized = true;
return true;
}
void PixelBufferWin32::closeImplementation()
{
if (_hwnd)
{
WGLExtensions* wgle = WGLExtensions::instance();
wglMakeCurrent(NULL,NULL);
if ( !wglDeleteContext(_hglrc) )
{
OSG_NOTICE << "PixelBufferWin32::closeImplementation, wglDeleteContext error: " << sysError() << std::endl;
}
if (wgle && wgle->isValid())
{
// Note that closeImplementation() should only be called from the same thread as created the pbuffer,
// otherwise these routines will return an error.
if ( !wgle->wglReleasePbufferDCARB(reinterpret_cast<HPBUFFERARB>(_hwnd), _hdc) )
{
OSG_NOTICE << "PixelBufferWin32::closeImplementation, wglReleasePbufferDCARB error: " << sysError() << std::endl;
}
if ( !wgle->wglDestroyPbufferARB(reinterpret_cast<HPBUFFERARB>(_hwnd)) )
{
OSG_NOTICE << "PixelBufferWin32::closeImplementation, wglDestroyPbufferARB error: " << sysError() << std::endl;
}
}
}
_valid = false;
_initialized = false;
_hwnd = 0;
_hdc = 0;
_hglrc = 0;
}
bool PixelBufferWin32::makeCurrentImplementation()
{
bool result = wglMakeCurrent(_hdc, _hglrc)==TRUE?true:false;
if (!result)
{
OSG_NOTICE << "PixelBufferWin32::makeCurrentImplementation, wglMakeCurrent error: " << sysError() << std::endl;
}
// If the pbuffer is bound to a texture then release it. This operation requires a current context, so
// do it after the MakeCurrent.
if ( _boundBuffer!=0 )
{
WGLExtensions* wgle = WGLExtensions::instance();
if ( wgle && wgle->wglReleaseTexImageARB )
{
if ( !wgle->wglReleaseTexImageARB(reinterpret_cast<HPBUFFERARB>(_hwnd), _boundBuffer) )
{
OSG_NOTICE << "PixelBufferWin32::makeCurrentImplementation, wglReleaseTexImageARB error: " << sysError() << std::endl;
}
_boundBuffer=0;
}
}
return result;
}
bool PixelBufferWin32::makeContextCurrentImplementation( GraphicsContext* readContext )
{
WGLExtensions* wgle = WGLExtensions::instance();
if ( !wgle || !wgle->wglMakeContextCurrentARB )
{
OSG_NOTICE << "PixelBufferWin32, wglMakeContextCurrentARB not available" << std::endl;
return false;
}
GraphicsHandleWin32* graphicsHandleWin32 = dynamic_cast<GraphicsHandleWin32*>(readContext);
if (graphicsHandleWin32)
{
return wgle->wglMakeContextCurrentARB(_hdc, graphicsHandleWin32->getHDC(), _hglrc);
}
return false;
}
bool PixelBufferWin32::releaseContextImplementation()
{
if (!_realized)
{
OSG_NOTICE<<"Warning: GraphicsWindow not realized, cannot do makeCurrent."<<std::endl;
return false;
}
return wglMakeCurrent( _hdc, 0 ) == TRUE?true:false;
}
void PixelBufferWin32::bindPBufferToTextureImplementation( GLenum buffer )
{
WGLExtensions* wgle = WGLExtensions::instance();
if ( !wgle || !wgle->wglBindTexImageARB )
{
OSG_NOTICE << "PixelBufferWin32, wglBindTexImageARB not available" << std::endl;
return;
}
int bindBuffer;
switch (buffer)
{
case GL_BACK:
bindBuffer = WGL_BACK_LEFT_ARB;
break;
case GL_FRONT:
bindBuffer = WGL_FRONT_LEFT_ARB;
break;
default:
bindBuffer = static_cast<int>(buffer);
}
if ( bindBuffer != _boundBuffer )
{
if ( _boundBuffer != 0 && !wgle->wglReleaseTexImageARB(reinterpret_cast<HPBUFFERARB>(_hwnd), _boundBuffer) )
{
OSG_NOTICE << "PixelBufferWin32::bindPBufferToTextureImplementation, wglReleaseTexImageARB error: " << sysError() << std::endl;
}
if ( !wgle->wglBindTexImageARB(reinterpret_cast<HPBUFFERARB>(_hwnd), bindBuffer) )
{
OSG_NOTICE << "PixelBufferWin32::bindPBufferToTextureImplementation, wglBindTexImageARB error: " << sysError() << std::endl;
}
_boundBuffer = bindBuffer;
}
}
void PixelBufferWin32::swapBuffersImplementation()
{
SwapBuffers( _hdc );
}
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