// Temporary deactivate the context
func (ic *contextInternal) release() ThreadError {
// disable the current context
if C.wglMakeCurrent(ic.hdc, nil) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
return nil
}
// Temporary activate the context
func (ic *contextInternal) take() ThreadError {
// start up the context
if C.wglMakeCurrent(ic.hdc, ic.context) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
return nil
}
// Deactivate, signal, wait for response, activate
func (ic *contextInternal) pause(signal chan bool) ThreadError {
// disable the current context
if C.wglMakeCurrent(ic.hdc, nil) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
// let the other thread know and then wait for them
signal <- true
<-signal
// start up the context
if C.wglMakeCurrent(ic.hdc, ic.context) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
return nil
}
// Deactivate the context as the current target for rendering
func (ic *contextInternal) deactivate() ThreadError {
// disable the current context
if C.wglMakeCurrent(ic.hdc, nil) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
// end by signaling
ic.signalDeactivation()
return nil
}
// Activate the context as the current target for rendering
func (ic *contextInternal) activate() ThreadError {
// start by waiting for deactivation to finish
<-ic.deactivateSignal
// start up the context
if C.wglMakeCurrent(ic.hdc, ic.context) == C.FALSE {
return NewThreadError(fmt.Errorf("wglMakeCurrent failed (%d)", C.GetLastError()), true)
}
// Load all the functions and such
C.wglLoadProcs(&ic.procs)
return nil
}
func CreateContext(win window.Window) C.HGLRC {
hdc := win.GetHDC()
if hdc == nil {
//TODO: Handle error somehow ???
return nil
}
tmpContext := C.wglCreateContext(*(*C.HDC)(hdc))
C.wglMakeCurrent(*(*C.HDC)(hdc), tmpContext)
C.glewInit()
var context C.HGLRC
if C.wglewIsSupported(C.CString("WGL_ARB_create_context")) == 1 {
//TODO: Figure out how to send attr to c func so it works!!!
context = C.openglCreateContextAttribsARB(*(*C.HDC)(hdc), nil)
C.wglMakeCurrent(nil, nil)
C.wglDeleteContext(tmpContext)
C.wglMakeCurrent(*(*C.HDC)(hdc), context)
}
return tmpContext
}