#include "wx/geometry.h"
#include "wx/dynarray.h"
#include "wx/dc.h"
+#include "wx/vector.h"
enum wxAntialiasMode
{
wxANTIALIAS_DEFAULT,
};
+enum wxInterpolationQuality
+{
+ // default interpolation
+ wxINTERPOLATION_DEFAULT,
+ // no interpolation
+ wxINTERPOLATION_NONE,
+ // fast interpolation, suited for interactivity
+ wxINTERPOLATION_FAST,
+ // better quality
+ wxINTERPOLATION_GOOD,
+ // best quality, not suited for interactivity
+ wxINTERPOLATION_BEST
+};
+
enum wxCompositionMode
{
// R = Result, S = Source, D = Destination, premultiplied with alpha
// Ra, Sa, Da their alpha components
-
+
// classic Porter-Duff compositions
// http://keithp.com/~keithp/porterduff/p253-porter.pdf
-
+
+ wxCOMPOSITION_INVALID = -1, /* indicates invalid/unsupported mode */
wxCOMPOSITION_CLEAR, /* R = 0 */
wxCOMPOSITION_SOURCE, /* R = S */
wxCOMPOSITION_OVER, /* R = S + D*(1 - Sa) */
wxCOMPOSITION_DEST_OUT, /* R = D*(1 - Sa) */
wxCOMPOSITION_DEST_ATOP, /* R = S*(1 - Da) + D*Sa */
wxCOMPOSITION_XOR, /* R = S*(1 - Da) + D*(1 - Sa) */
-
+
// mathematical compositions
- wxCOMPOSITION_ADD, /* R = S + D */
+ wxCOMPOSITION_ADD /* R = S + D */
};
class WXDLLIMPEXP_FWD_CORE wxWindowDC;
#if wxUSE_PRINTING_ARCHITECTURE
class WXDLLIMPEXP_FWD_CORE wxPrinterDC;
#endif
+#ifdef __WXMSW__
+#if wxUSE_ENH_METAFILE
+class WXDLLIMPEXP_FWD_CORE wxEnhMetaFileDC;
+#endif
+#endif
class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
class WXDLLIMPEXP_FWD_CORE wxGraphicsPath;
class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrix;
extern WXDLLIMPEXP_DATA_CORE(wxGraphicsPath) wxNullGraphicsPath;
+// Describes a single gradient stop.
+class wxGraphicsGradientStop
+{
+public:
+ wxGraphicsGradientStop(wxColour col = wxTransparentColour,
+ float pos = 0.)
+ : m_col(col),
+ m_pos(pos)
+ {
+ }
+
+ // default copy ctor, assignment operator and dtor are ok
+
+ const wxColour& GetColour() const { return m_col; }
+ void SetColour(const wxColour& col) { m_col = col; }
+
+ float GetPosition() const { return m_pos; }
+ void SetPosition(float pos)
+ {
+ wxASSERT_MSG( pos >= 0 && pos <= 1, "invalid gradient stop position" );
+
+ m_pos = pos;
+ }
+
+private:
+ // The colour of this gradient band.
+ wxColour m_col;
+
+ // Its starting position: 0 is the beginning and 1 is the end.
+ float m_pos;
+};
+
+// A collection of gradient stops ordered by their positions (from lowest to
+// highest). The first stop (index 0, position 0.0) is always the starting
+// colour and the last one (index GetCount() - 1, position 1.0) is the end
+// colour.
+class WXDLLIMPEXP_CORE wxGraphicsGradientStops
+{
+public:
+ wxGraphicsGradientStops(wxColour startCol = wxTransparentColour,
+ wxColour endCol = wxTransparentColour)
+ {
+ // we can't use Add() here as it relies on having start/end stops as
+ // first/last array elements so do it manually
+ m_stops.push_back(wxGraphicsGradientStop(startCol, 0.f));
+ m_stops.push_back(wxGraphicsGradientStop(endCol, 1.f));
+ }
+
+ // default copy ctor, assignment operator and dtor are ok for this class
+
+
+ // Add a stop in correct order.
+ void Add(const wxGraphicsGradientStop& stop);
+ void Add(wxColour col, float pos) { Add(wxGraphicsGradientStop(col, pos)); }
+
+ // Get the number of stops.
+ unsigned GetCount() const { return m_stops.size(); }
+
+ // Return the stop at the given index (which must be valid).
+ wxGraphicsGradientStop Item(unsigned n) const { return m_stops.at(n); }
+
+ // Get/set start and end colours.
+ void SetStartColour(wxColour col)
+ { m_stops[0].SetColour(col); }
+ wxColour GetStartColour() const
+ { return m_stops[0].GetColour(); }
+ void SetEndColour(wxColour col)
+ { m_stops[m_stops.size() - 1].SetColour(col); }
+ wxColour GetEndColour() const
+ { return m_stops[m_stops.size() - 1].GetColour(); }
+
+private:
+ // All the stops stored in ascending order of positions.
+ wxVector<wxGraphicsGradientStop> m_stops;
+};
+
class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
{
public:
static wxGraphicsContext * Create( const wxMemoryDC& dc);
#if wxUSE_PRINTING_ARCHITECTURE
static wxGraphicsContext * Create( const wxPrinterDC& dc);
+#endif
+#ifdef __WXMSW__
+#if wxUSE_ENH_METAFILE
+ static wxGraphicsContext * Create( const wxEnhMetaFileDC& dc);
+#endif
#endif
static wxGraphicsContext* CreateFromNative( void * context );
virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;
- // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
- virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
- const wxColour&c1, const wxColour&c2) const;
-
- // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
- // with radius r and color cColor
- virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
- const wxColour &oColor, const wxColour &cColor) const;
+ // sets the brush to a linear gradient, starting at (x1,y1) and ending at
+ // (x2,y2) with the given boundary colours or the specified stops
+ wxGraphicsBrush
+ CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+ wxDouble x2, wxDouble y2,
+ const wxColour& c1, const wxColour& c2) const;
+ wxGraphicsBrush
+ CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+ wxDouble x2, wxDouble y2,
+ const wxGraphicsGradientStops& stops) const;
+
+ // sets the brush to a radial gradient originating at (xo,yc) and ending
+ // on a circle around (xc,yc) with the given radius; the colours may be
+ // specified by just the two extremes or the full array of gradient stops
+ wxGraphicsBrush
+ CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+ wxDouble xc, wxDouble yc, wxDouble radius,
+ const wxColour& oColor, const wxColour& cColor) const;
+
+ wxGraphicsBrush
+ CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+ wxDouble xc, wxDouble yc, wxDouble radius,
+ const wxGraphicsGradientStops& stops) const;
// sets the font
virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
// returns the current shape antialiasing mode
virtual wxAntialiasMode GetAntialiasMode() const { return m_antialias; }
-
+
// sets the antialiasing mode, returns true if it supported
virtual bool SetAntialiasMode(wxAntialiasMode antialias) = 0;
+ // returns the current interpolation quality
+ virtual wxInterpolationQuality GetInterpolationQuality() const { return m_interpolation; }
+
+ // sets the interpolation quality, returns true if it supported
+ virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation) = 0;
+
// returns the current compositing operator
virtual wxCompositionMode GetCompositionMode() const { return m_composition; }
-
+
// sets the compositing operator, returns true if it supported
virtual bool SetCompositionMode(wxCompositionMode op) = 0;
// returns the size of the graphics context in device coordinates
- virtual void GetSize( wxDouble* width, wxDouble* height);
+ void GetSize(wxDouble* width, wxDouble* height)
+ {
+ if ( width )
+ *width = m_width;
+ if ( height )
+ *height = m_height;
+ }
// returns the resolution of the graphics context in device points per inch
virtual void GetDPI( wxDouble* dpiX, wxDouble* dpiY);
// all rendering is done into a fully transparent temporary context
virtual void BeginLayer(wxDouble opacity) = 0;
- // composites back the drawings into the context with the opacity given at
+ // composites back the drawings into the context with the opacity given at
// the BeginLayer call
virtual void EndLayer() = 0;
virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
- wxDouble *descent, wxDouble *externalLeading ) const = 0;
+ wxDouble *descent = NULL, wxDouble *externalLeading = NULL ) const = 0;
virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const = 0;
// helper to determine if a 0.5 offset should be applied for the drawing operation
virtual bool ShouldOffset() const { return false; }
-
+
+ // indicates whether the context should try to offset for pixel boundaries, this only makes sense on
+ // bitmap devices like screen, by default this is turned off
+ virtual void EnableOffset(bool enable = true);
+
+ void DisableOffset() { EnableOffset(false); }
+ bool OffsetEnabled() { return m_enableOffset; }
+
protected:
+ // These fields must be initialized in the derived class ctors.
+ wxDouble m_width,
+ m_height;
wxGraphicsPen m_pen;
wxGraphicsBrush m_brush;
wxGraphicsFont m_font;
wxAntialiasMode m_antialias;
wxCompositionMode m_composition;
+ wxInterpolationQuality m_interpolation;
+ bool m_enableOffset;
protected:
// implementations of overloaded public functions: we use different names
static wxGraphicsRenderer* GetDefaultRenderer();
+ static wxGraphicsRenderer* GetCairoRenderer();
// Context
virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0;
virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0;
#if wxUSE_PRINTING_ARCHITECTURE
virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc) = 0;
+#endif
+#ifdef __WXMSW__
+#if wxUSE_ENH_METAFILE
+ virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc) = 0;
+#endif
#endif
virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0;
- // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
- virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
- const wxColour&c1, const wxColour&c2) = 0;
+ // Gradient brush creation functions may not honour all the stops specified
+ // stops and use just its boundary colours (this is currently the case
+ // under OS X)
+ virtual wxGraphicsBrush
+ CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+ wxDouble x2, wxDouble y2,
+ const wxGraphicsGradientStops& stops) = 0;
- // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
- // with radius r and color cColor
- virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
- const wxColour &oColor, const wxColour &cColor) = 0;
+ virtual wxGraphicsBrush
+ CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+ wxDouble xc, wxDouble yc,
+ wxDouble radius,
+ const wxGraphicsGradientStops& stops) = 0;
- // sets the font
+ // sets the font
virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
// create a native bitmap representation
virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0;
+ // create a graphics bitmap from a native bitmap
+ virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap ) = 0;
+
// create a subimage from a native image representation
virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
projects / wxWidgets.git / blobdiff