//----------------------------------------------------------------------------//
void OpenGLWGLPBTextureTarget::initialisePBuffer()
{
int creation_attrs[] =
{
WGL_PBUFFER_LARGEST_ARB, true,
0
};
releasePBuffer();
HDC hdc = wglGetCurrentDC();
d_pbuffer = wglCreatePbufferARB(hdc, d_pixfmt,
static_cast<int>(d_area.getWidth()),
static_cast<int>(d_area.getHeight()),
creation_attrs);
if (!d_pbuffer)
CEGUI_THROW(RendererException(
"OpenGLWGLPBTextureTarget::initialisePBuffer - "
"pbuffer creation failure, wglCreatePbufferARB() call failed."));
d_hdc = wglGetPbufferDCARB(d_pbuffer);
if (!d_hdc)
CEGUI_THROW(RendererException(
"OpenGLWGLPBTextureTarget::initialisePBuffer - "
"pbuffer creation failure, wglGetPbufferDCARB() call failed."));
d_context= wglCreateContext(d_hdc);
if (!d_hdc)
CEGUI_THROW(RendererException(
"OpenGLWGLPBTextureTarget::initialisePBuffer - "
"pbuffer creation failure, wglCreateContext() call failed."));
if(!wglShareLists(wglGetCurrentContext(), d_context))
CEGUI_THROW(RendererException(
"OpenGLWGLPBTextureTarget::initialisePBuffer - "
"pbuffer creation failure, wglShareLists() call failed."));
// extract the actual size of the created bufer
int actual_width, actual_height;
wglQueryPbufferARB(d_pbuffer, WGL_PBUFFER_WIDTH_ARB, &actual_width);
wglQueryPbufferARB(d_pbuffer, WGL_PBUFFER_HEIGHT_ARB, &actual_height);
d_area.setSize(Size(static_cast<float>(actual_width),
static_cast<float>(actual_height)));
// ensure CEGUI::Texture is wrapping real GL texture and has correct size
d_CEGUITexture->setOpenGLTexture(d_texture, d_area.getSize());
}
//----------------------------------------------------------------------------//
OpenGLWGLPBTextureTarget::~OpenGLWGLPBTextureTarget()
{
releasePBuffer();
}
//----------------------------------------------------------------------------//
void OpenGLWGLPBTextureTarget::grabTexture()
{
releasePBuffer();
OpenGLTextureTarget::grabTexture();
}
