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wxWidgets/include/wx/mgl/dc.h

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/////////////////////////////////////////////////////////////////////////////
// Name: dc.h
// Purpose: wxDC class
// Author: Vaclav Slavik
// Created: 2001/03/09
// RCS-ID: $Id$
// Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DC_H_
#define _WX_DC_H_
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "dc.h"
#endif
#include "wx/defs.h"
#include "wx/region.h"
//-----------------------------------------------------------------------------
// classes
//-----------------------------------------------------------------------------
class WXDLLEXPORT wxDC;
//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------
#ifndef MM_TEXT
#define MM_TEXT 0
#define MM_ISOTROPIC 1
#define MM_ANISOTROPIC 2
#define MM_LOMETRIC 3
#define MM_HIMETRIC 4
#define MM_TWIPS 5
#define MM_POINTS 6
#define MM_METRIC 7
#endif
//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------
// MGL fwd declarations:
class MGLDevCtx;
class MGLRegion;
struct font_t;
class WXDLLEXPORT wxDC : public wxDCBase
{
DECLARE_DYNAMIC_CLASS(wxDC)
public:
wxDC();
~wxDC();
// implement base class pure virtuals
// ----------------------------------
virtual void Clear();
virtual bool StartDoc(const wxString& message);
virtual void EndDoc();
virtual void StartPage();
virtual void EndPage();
virtual void SetFont(const wxFont& font);
virtual void SetPen(const wxPen& pen);
virtual void SetBrush(const wxBrush& brush);
virtual void SetBackground(const wxBrush& brush);
virtual void SetBackgroundMode(int mode);
virtual void SetPalette(const wxPalette& palette);
virtual void DestroyClippingRegion();
virtual wxCoord GetCharHeight() const;
virtual wxCoord GetCharWidth() const;
virtual void DoGetTextExtent(const wxString& string,
wxCoord *x, wxCoord *y,
wxCoord *descent = NULL,
wxCoord *externalLeading = NULL,
wxFont *theFont = NULL) const;
virtual bool CanDrawBitmap() const;
virtual bool CanGetTextExtent() const;
virtual int GetDepth() const;
virtual wxSize GetPPI() const;
virtual void SetMapMode(int mode);
virtual void SetUserScale(double x, double y);
virtual void SetLogicalScale(double x, double y);
virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
virtual void SetLogicalFunction(int function);
// implementation from now on
// --------------------------
virtual void ComputeScaleAndOrigin();
wxCoord XDEV2LOG(wxCoord x) const
{
wxCoord new_x = x - m_deviceOriginX;
if (new_x > 0)
return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
else
return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
}
wxCoord XDEV2LOGREL(wxCoord x) const
{
if (x > 0)
return (wxCoord)((double)(x) / m_scaleX + 0.5);
else
return (wxCoord)((double)(x) / m_scaleX - 0.5);
}
wxCoord YDEV2LOG(wxCoord y) const
{
wxCoord new_y = y - m_deviceOriginY;
if (new_y > 0)
return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
else
return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
}
wxCoord YDEV2LOGREL(wxCoord y) const
{
if (y > 0)
return (wxCoord)((double)(y) / m_scaleY + 0.5);
else
return (wxCoord)((double)(y) / m_scaleY - 0.5);
}
wxCoord XLOG2DEV(wxCoord x) const
{
wxCoord new_x = x - m_logicalOriginX;
if (new_x > 0)
return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
else
return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
}
wxCoord XLOG2DEVREL(wxCoord x) const
{
if (x > 0)
return (wxCoord)((double)(x) * m_scaleX + 0.5);
else
return (wxCoord)((double)(x) * m_scaleX - 0.5);
}
wxCoord YLOG2DEV(wxCoord y) const
{
wxCoord new_y = y - m_logicalOriginY;
if (new_y > 0)
return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
else
return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
}
wxCoord YLOG2DEVREL(wxCoord y) const
{
if (y > 0)
return (wxCoord)((double)(y) * m_scaleY + 0.5);
else
return (wxCoord)((double)(y) * m_scaleY - 0.5);
}
MGLDevCtx *GetMGLDC() const { return m_MGLDC; }
void SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC = FALSE);
protected:
virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
int style = wxFLOOD_SURFACE);
virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
virtual void DoDrawPoint(wxCoord x, wxCoord y);
virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
virtual void DoDrawArc(wxCoord x1, wxCoord y1,
wxCoord x2, wxCoord y2,
wxCoord xc, wxCoord yc);
virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
double sa, double ea);
virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
wxCoord width, wxCoord height,
double radius);
virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
virtual void DoCrossHair(wxCoord x, wxCoord y);
virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
bool useMask = FALSE);
virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
double angle);
virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
wxDC *source, wxCoord xsrc, wxCoord ysrc,
int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1);
// this is gnarly - we can't even call this function DoSetClippingRegion()
// because of virtual function hiding
virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord width, wxCoord height);
virtual void DoGetSize(int *width, int *height) const;
virtual void DoGetSizeMM(int* width, int* height) const;
virtual void DoDrawLines(int n, wxPoint points[],
wxCoord xoffset, wxCoord yoffset);
virtual void DoDrawPolygon(int n, wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
int fillStyle = wxODDEVEN_RULE);
// implementation from now on:
protected:
// setup newly attached MGLDevCtx for wxDC's use
// (does things like setting RGB blending mode for antialiased texts):
void InitializeMGLDC();
// common part of DoDrawText() and DoDrawRotatedText()
void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
// MGL uses pens as both wxPens and wxBrushes, so we have to
// switch them as needed:
void SelectPen();
void SelectBrush();
void SelectMGLStipplePen(int style);
void SelectMGLFatPen(int style, int flag);
// Select m_font into m_MGLDC:
bool SelectMGLFont();
// Convert wxWin logical function to MGL rop:
int LogicalFunctionToMGLRop(int logFunc) const;
// Unified implementation of DrawIcon, DrawBitmap and Blit:
void DoDrawSubBitmap(const wxBitmap &bmp,
wxCoord x, wxCoord y, wxCoord w, wxCoord h,
wxCoord destx, wxCoord desty, int rop, bool useMask);
// MGL DC class we use:
MGLDevCtx *m_MGLDC;
bool m_OwnsMGLDC:1;
// helper variables for SelectXXXX():
bool m_penSelected;
bool m_brushSelected;
bool m_downloadedPatterns[2];
// MGL does not render lines with width>1 with endings centered
// at given coords but with top left corner of the pen at them,
// these offsets are used to correct it. They are computed by
// SelectPen.
int m_penOfsX, m_penOfsY;
double m_mm_to_pix_x, m_mm_to_pix_y;
wxPalette m_oldPalette;
wxRegion m_currentClippingRegion;
wxRegion m_globalClippingRegion;
// wxDC::Blit handles memoryDCs as special cases :(
bool m_isMemDC;
font_t *m_mglFont;
};
#endif
// _WX_DC_H_
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