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// File: OpenGl_PrinterContext.hxx
// Created: 20.05.11 10:00:00
// Author: Anton POLETAEV
#ifndef _OPENGL_PRINTERCONTEXT_H
#define _OPENGL_PRINTERCONTEXT_H
#include <MMgt_TShared.hxx>
#include <Standard.hxx>
#include <Standard_DefineHandle.hxx>
#include <Handle_MMgt_TShared.hxx>
#include <OpenGl_tgl_all.hxx>
#include <NCollection_DataMap.hxx>
#include <InterfaceGraphic_Graphic3d.hxx>
#include <InterfaceGraphic_Visual3d.hxx>
#include <TColStd_Array2OfReal.hxx>
class Standard_Transient;
class Handle(Standard_Type);
class Handle(MMgt_TShared);
class OpenGl_PrinterContext;
DEFINE_STANDARD_HANDLE(OpenGl_PrinterContext,MMgt_TShared)
//! Class provides specific information for redrawing view to offscreen buffer
//! on printing. The information is: projection matrixes for tiling,
//! scaling factors for text/markers and layer viewport dimensions.
//! The OpenGl_PrinterContext class allows to have only one global instance
//! that can be accessed by GetPrinterContext() during printing operation.
//! The class instance can be created only by call_togl_print().
class OpenGl_PrinterContext : public MMgt_TShared
{
public:
//! 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.
static OpenGl_PrinterContext* GetPrinterContext(GLCONTEXT theCtx);
//! Get view projection transformation matrix.
const TColStd_Array2OfReal& GetProjTransformation ()
{
return myProjTransform;
}
//! Get view projection transformation matrix.
void GetProjTransformation (GLfloat theMatrix[16]);
//! Get text/markers scale factor
void GetScale (GLfloat& theScaleX, GLfloat& theScaleY)
{
theScaleX = myScaleX;
theScaleY = myScaleY;
}
//! Get layer viewport dimensions
void GetLayerViewport (GLsizei& theViewportX,
GLsizei& theViewportY)
{
theViewportX = myLayerViewportX;
theViewportY = myLayerViewportY;
}
private:
//! Constructor
OpenGl_PrinterContext (GLCONTEXT theCtx);
//! Destructor
virtual ~OpenGl_PrinterContext ();
//! Deactivate current printing context.
//! 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 Deactivate ();
//! Set view projection transformation matrix for printing/tiling purposes
//! theProjTransform parameter should be an 4x4 array.
bool SetProjTransformation (TColStd_Array2OfReal& theProjTransform);
//! Set text scale factor
void SetScale (GLfloat theScaleX, GLfloat theScaleY)
{
myScaleX = theScaleX;
myScaleY = theScaleY;
}
//! Set layer viewport dimensions
void SetLayerViewport (GLsizei theViewportX,
GLsizei theViewportY)
{
myLayerViewportX = theViewportX;
myLayerViewportY = theViewportY;
}
private:
static OpenGl_PrinterContext* g_PrinterContext;
static GLCONTEXT g_ContextId;
TColStd_Array2OfReal myProjTransform;
GLfloat myScaleX;
GLfloat myScaleY;
GLsizei myLayerViewportX;
GLsizei myLayerViewportY;
GLCONTEXT myCtx;
// the printer context could be created only in method call_togl_print
friend Standard_Boolean call_togl_print (CALL_DEF_VIEW *, CALL_DEF_LAYER *,
CALL_DEF_LAYER *,
const Aspect_Drawable, const int,
const char*, const int, const float);
};
#endif
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