/////////////////////////////////////////////////////////////////////////////
-// Name: dc.h
+// Name: wx/msw/dc.h
// Purpose: wxDC class
// Author: Julian Smart
// Modified by:
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifndef _WX_DC_H_
-#define _WX_DC_H_
+#ifndef _WX_MSW_DC_H_
+#define _WX_MSW_DC_H_
-#ifdef __GNUG__
- #pragma interface "dc.h"
+#include "wx/defs.h"
+
+// ---------------------------------------------------------------------------
+// macros
+// ---------------------------------------------------------------------------
+
+#if wxUSE_DC_CACHEING
+/*
+ * Cached blitting, maintaining a cache
+ * of bitmaps required for transparent blitting
+ * instead of constant creation/deletion
+ */
+
+class wxDCCacheEntry: public wxObject
+{
+public:
+ wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth);
+ wxDCCacheEntry(WXHDC hDC, int depth);
+ virtual ~wxDCCacheEntry();
+
+ WXHBITMAP m_bitmap;
+ WXHDC m_dc;
+ int m_width;
+ int m_height;
+ int m_depth;
+};
#endif
+// this is an ABC: use one of the derived classes to create a DC associated
+// with a window, screen, printer and so on
class WXDLLEXPORT wxDC : public wxDCBase
{
- DECLARE_DYNAMIC_CLASS(wxDC)
-
public:
- wxDC();
- ~wxDC();
+ wxDC(WXHDC hDC) { Init(); m_hDC = hDC; }
+ virtual ~wxDC();
// implement base class pure virtuals
// ----------------------------------
virtual void SetBrush(const wxBrush& brush);
virtual void SetBackground(const wxBrush& brush);
virtual void SetBackgroundMode(int mode);
+#if wxUSE_PALETTE
virtual void SetPalette(const wxPalette& palette);
+#endif // wxUSE_PALETTE
virtual void DestroyClippingRegion();
- virtual long GetCharHeight() const;
- virtual long GetCharWidth() const;
- virtual void GetTextExtent(const wxString& string,
- long *x, long *y,
- long *descent = NULL,
- long *externalLeading = NULL,
- wxFont *theFont = NULL) const;
+ virtual wxCoord GetCharHeight() const;
+ virtual wxCoord GetCharWidth() 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 SetSystemScale(double x, double y);
virtual void SetLogicalScale(double x, double y);
- virtual void SetLogicalOrigin(long x, long y);
- virtual void SetDeviceOrigin(long x, long 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 SetRop(WXHDC cdc);
- virtual void DoClipping(WXHDC cdc);
virtual void SelectOldObjects(WXHDC dc);
wxWindow *GetWindow() const { return m_canvas; }
- void SetWindow(wxWindow *win) { m_canvas = win; }
+ void SetWindow(wxWindow *win)
+ {
+ m_canvas = win;
+
+#if wxUSE_PALETTE
+ // if we have palettes use the correct one for this window
+ InitializePalette();
+#endif // wxUSE_PALETTE
+ }
WXHDC GetHDC() const { return m_hDC; }
- void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
+ void SetHDC(WXHDC dc, bool bOwnsDC = false)
{
m_hDC = dc;
m_bOwnsDC = bOwnsDC;
+
+ // we might have a pre existing clipping region, make sure that we
+ // return it if asked -- but avoid calling ::GetClipBox() right now as
+ // it could be unnecessary wasteful
+ m_clipping = true;
+ m_clipX1 =
+ m_clipX2 = 0;
}
+ const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; }
+ wxBitmap& GetSelectedBitmap() { return m_selectedBitmap; }
+
+ // update the internal clip box variables
+ void UpdateClipBox();
+
+#if wxUSE_DC_CACHEING
+ static wxDCCacheEntry* FindBitmapInCache(WXHDC hDC, int w, int h);
+ static wxDCCacheEntry* FindDCInCache(wxDCCacheEntry* notThis, WXHDC hDC);
+
+ static void AddToBitmapCache(wxDCCacheEntry* entry);
+ static void AddToDCCache(wxDCCacheEntry* entry);
+ static void ClearCache();
+#endif
+
+ // RTL related functions
+ // ---------------------
+
+ // get or change the layout direction (LTR or RTL) for this dc,
+ // wxLayout_Default is returned if layout direction is not supported
+ virtual wxLayoutDirection GetLayoutDirection() const;
+ virtual void SetLayoutDirection(wxLayoutDirection dir);
+
protected:
- virtual void DoFloodFill(long x, long y, const wxColour& col,
+ void Init()
+ {
+ m_canvas = NULL;
+ m_bOwnsDC = false;
+ m_hDC = NULL;
+
+ m_oldBitmap = NULL;
+ m_oldPen = NULL;
+ m_oldBrush = NULL;
+ m_oldFont = NULL;
+
+#if wxUSE_PALETTE
+ m_oldPalette = NULL;
+#endif // wxUSE_PALETTE
+ }
+
+ // create an uninitialized DC: this should be only used by the derived
+ // classes
+ wxDC() { Init(); }
+
+ void RealizeScaleAndOrigin();
+
+ virtual void DoGetTextExtent(const wxString& string,
+ wxCoord *x, wxCoord *y,
+ wxCoord *descent = NULL,
+ wxCoord *externalLeading = NULL,
+ const wxFont *theFont = NULL) const;
+ virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
+
+ virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
int style = wxFLOOD_SURFACE);
- virtual bool DoGetPixel(long x, long y, wxColour *col) const;
+ virtual void DoGradientFillLinear(const wxRect& rect,
+ const wxColour& initialColour,
+ const wxColour& destColour,
+ wxDirection nDirection = wxEAST);
- virtual void DoDrawPoint(long x, long y);
- virtual void DoDrawLine(long x1, long y1, long x2, long y2);
+ virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
- virtual void DoDrawArc(long x1, long y1,
- long x2, long y2,
- long xc, long yc);
- virtual void DoDrawEllipticArc(long x, long y, long w, long h,
+ 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 DoDrawCheckMark(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height);
+ virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
double sa, double ea);
- virtual void DoDrawRectangle(long x, long y, long width, long height);
- virtual void DoDrawRoundedRectangle(long x, long y,
- long width, long height,
+ 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(long x, long y, long width, long height);
+ virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
+
+#if wxUSE_SPLINES
+ virtual void DoDrawSpline(const wxPointList *points);
+#endif
- virtual void DoCrossHair(long x, long y);
+ virtual void DoCrossHair(wxCoord x, wxCoord y);
- virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
- virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
- bool useMask = FALSE);
+ 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, long x, long y);
+ 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(long xdest, long ydest, long width, long height,
- wxDC *source, long xsrc, long ysrc,
- int rop = wxCOPY, bool useMask = FALSE);
+ 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 = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
+
+ virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
+ wxCoord dstWidth, wxCoord dstHeight,
+ wxDC *source,
+ wxCoord xsrc, wxCoord ysrc,
+ wxCoord srcWidth, wxCoord srcHeight,
+ int rop = wxCOPY, bool useMask = false,
+ wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
// 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(long x, long y,
- long width, long height);
- virtual void DoGetClippingRegion(long *x, long *y,
- long *width, long *height)
- {
- GetClippingBox(x, y, width, height);
- }
+ virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height);
+ virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
+ wxCoord *w, wxCoord *h) const;
- virtual void DoGetSize(int *width, int *height) const;
virtual void DoGetSizeMM(int* width, int* height) const;
virtual void DoDrawLines(int n, wxPoint points[],
- long xoffset, long yoffset);
+ wxCoord xoffset, wxCoord yoffset);
virtual void DoDrawPolygon(int n, wxPoint points[],
- long xoffset, long yoffset,
+ wxCoord xoffset, wxCoord yoffset,
int fillStyle = wxODDEVEN_RULE);
+ virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset,
+ int fillStyle = wxODDEVEN_RULE);
+ virtual wxBitmap DoGetAsBitmap(const wxRect *subrect) const
+ { return subrect == NULL ? GetSelectedBitmap() : GetSelectedBitmap().GetSubBitmap(*subrect); }
+
+
+#if wxUSE_PALETTE
+ // MSW specific, select a logical palette into the HDC
+ // (tell windows to translate pixel from other palettes to our custom one
+ // and vice versa)
+ // Realize tells it to also reset the system palette to this one.
+ void DoSelectPalette(bool realize = false);
+
+ // Find out what palette our parent window has, then select it into the dc
+ void InitializePalette();
+#endif // wxUSE_PALETTE
+
+ // common part of DoDrawText() and DoDrawRotatedText()
+ void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
+
+ // common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+ void SetClippingHrgn(WXHRGN hrgn);
+
+ // implementation of DoGetSize() for wxScreen/PrinterDC: this simply
+ // returns the size of the entire device this DC is associated with
+ //
+ // notice that we intentionally put it in a separate function instead of
+ // DoGetSize() itself because we want it to remain pure virtual both
+ // because each derived class should take care to define it as needed (this
+ // implementation is not at all always appropriate) and because we want
+ // wxDC to be an ABC to prevent it from being created directly
+ void GetDeviceSize(int *width, int *height) const;
-#if wxUSE_SPLINES
- virtual void DoDrawSpline(wxList *points);
-#endif // wxUSE_SPLINES
// MSW-specific member variables
- int m_windowExtX;
- int m_windowExtY;
+ // -----------------------------
// the window associated with this DC (may be NULL)
wxWindow *m_canvas;
// TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
bool m_bOwnsDC:1;
- // our HDC and its usage count: we only free it when the usage count drops
- // to 0
+ // our HDC
WXHDC m_hDC;
- int m_hDCCount;
// Store all old GDI objects when do a SelectObject, so we can select them
// back in (this unselecting user's objects) so we can safely delete the
WXHPEN m_oldPen;
WXHBRUSH m_oldBrush;
WXHFONT m_oldFont;
- WXHPALETTE m_oldPalette;
-};
-
-// Logical to device
-// Absolute
-#define XLOG2DEV(x) (x)
-#define YLOG2DEV(y) (y)
-
-// Relative
-#define XLOG2DEVREL(x) (x)
-#define YLOG2DEVREL(y) (y)
-
-// Device to logical
-// Absolute
-#define XDEV2LOG(x) (x)
-
-#define YDEV2LOG(y) (y)
-
-// Relative
-#define XDEV2LOGREL(x) (x)
-#define YDEV2LOGREL(y) (y)
-
-/*
- * Have the same macros as for XView but not for every operation:
- * just for calculating window/viewport extent (a better way of scaling).
- */
-
-// Logical to device
-// Absolute
-#define MS_XLOG2DEV(x) LogicalToDevice(x)
-#define MS_YLOG2DEV(y) LogicalToDevice(y)
+#if wxUSE_PALETTE
+ WXHPALETTE m_oldPalette;
+#endif // wxUSE_PALETTE
-// Relative
-#define MS_XLOG2DEVREL(x) LogicalToDeviceXRel(x)
-#define MS_YLOG2DEVREL(y) LogicalToDeviceYRel(y)
+#if wxUSE_DC_CACHEING
+ static wxList sm_bitmapCache;
+ static wxList sm_dcCache;
+#endif
-// Device to logical
-// Absolute
-#define MS_XDEV2LOG(x) DeviceToLogicalX(x)
+ DECLARE_DYNAMIC_CLASS(wxDC)
+ DECLARE_NO_COPY_CLASS(wxDC)
+};
-#define MS_YDEV2LOG(y) DeviceToLogicalY(y)
+// ----------------------------------------------------------------------------
+// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWidgets
+// only/mainly)
+// ----------------------------------------------------------------------------
-// Relative
-#define MS_XDEV2LOGREL(x) DeviceToLogicalXRel(x)
-#define MS_YDEV2LOGREL(y) DeviceToLogicalYRel(y)
+class WXDLLEXPORT wxDCTemp : public wxDC
+{
+public:
+ // construct a temporary DC with the specified HDC and size (it should be
+ // specified whenever we know it for this HDC)
+ wxDCTemp(WXHDC hdc, const wxSize& size = wxDefaultSize)
+ : wxDC(hdc),
+ m_size(size)
+ {
+ }
-#define MM_POINTS 9
-#define MM_METRIC 10
+ virtual ~wxDCTemp()
+ {
+ // prevent base class dtor from freeing it
+ SetHDC((WXHDC)NULL);
+ }
-// Conversion
-#define METRIC_CONVERSION_CONSTANT 0.0393700787
+protected:
+ virtual void DoGetSize(int *w, int *h) const
+ {
+ wxASSERT_MSG( m_size.IsFullySpecified(),
+ _T("size of this DC hadn't been set and is unknown") );
-// Scaling factors for various unit conversions
-#define mm2inches (METRIC_CONVERSION_CONSTANT)
-#define inches2mm (1/METRIC_CONVERSION_CONSTANT)
+ if ( w )
+ *w = m_size.x;
+ if ( h )
+ *h = m_size.y;
+ }
-#define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
-#define twips2mm (1/(METRIC_CONVERSION_CONSTANT*1440))
+private:
+ // size of this DC must be explicitly set by SetSize() as we have no way to
+ // find it ourselves
+ const wxSize m_size;
-#define mm2pt (METRIC_CONVERSION_CONSTANT*72)
-#define pt2mm (1/(METRIC_CONVERSION_CONSTANT*72))
+ DECLARE_NO_COPY_CLASS(wxDCTemp)
+};
-#define wx_round(a) (int)((a)+.5)
+#endif // _WX_MSW_DC_H_
-#endif
- // _WX_DC_H_
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