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// File: OpenGl_PrinterContext.cxx
// Created: 20.05.11 10:00:00
// Author: Anton POLETAEV
#include <OpenGl_PrinterContext.hxx>
OpenGl_PrinterContext* OpenGl_PrinterContext::g_PrinterContext = NULL;
GLCONTEXT OpenGl_PrinterContext::g_ContextId = NULL;
//=======================================================================
//function : OpenGl_PrinterContext
//purpose : Constructor
//=======================================================================
OpenGl_PrinterContext::OpenGl_PrinterContext (GLCONTEXT theCtx) :
myCtx (theCtx), myProjTransform (0, 3, 0, 3), myLayerViewportX (0),
myLayerViewportY (0), myScaleX (1.0f), myScaleY (1.0f)
{
// assign global instance to the current object
if (myCtx != NULL)
{
g_PrinterContext = this;
g_ContextId = myCtx;
}
// init projection matrix
Standard_Real anInitValue = 0.0;
myProjTransform.Init (anInitValue);
myProjTransform (0,0) = 1.0f;
myProjTransform (1,1) = 1.0f;
myProjTransform (2,2) = 1.0f;
myProjTransform (3,3) = 1.0f;
}
//=======================================================================
//function : ~OpenGl_PrinterContext
//purpose : Destructor
//=======================================================================
OpenGl_PrinterContext::~OpenGl_PrinterContext ()
{
// unassign global instance
if (g_PrinterContext == this)
{
g_ContextId = NULL;
g_PrinterContext = NULL;
}
}
//=======================================================================
//function : GetProjTransformation
//purpose : Get view projection transformation matrix.
//=======================================================================
void OpenGl_PrinterContext::GetProjTransformation (GLfloat theMatrix[16])
{
for (int i = 0, k = 0; i < 4; i++)
for (int j = 0; j < 4; j++, k++)
theMatrix[k] = (GLfloat)myProjTransform (i,j);
}
//=======================================================================
//function : SetProjTransformation
//purpose : Set view projection transformation matrix for printing purposes.
// theProjTransform parameter should be an 4x4 array.
//=======================================================================
bool OpenGl_PrinterContext::SetProjTransformation (TColStd_Array2OfReal& thePrj)
{
if (thePrj.RowLength () != 4 || thePrj.ColLength () != 4)
return false;
myProjTransform = thePrj;
return true;
}
//=======================================================================
//function : Deactivate
//purpose : Deactivate PrinterContext object.
// Useful when you need to redraw in usual mode the same
// OpenGl context that you used for printing right after printing,
// before the OpenGl_PrinterContext instance destroyed
//=======================================================================
void OpenGl_PrinterContext::Deactivate ()
{
// unassign global instance
if (g_PrinterContext == this)
{
g_ContextId = NULL;
g_PrinterContext = NULL;
}
}
//=======================================================================
//function : GetInstance
//purpose : Get the PrinterContext instance assigned for OpenGl context.
// Return NULL, if there is no current printing operation and
// there is no assigned instance for "theCtx" OpenGl context.
//=======================================================================
OpenGl_PrinterContext* OpenGl_PrinterContext::GetPrinterContext (GLCONTEXT theCtx)
{
if (g_ContextId == theCtx)
return g_PrinterContext;
else
return NULL;
}
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