Initial work on virtual file system support for the WebKitGTK+ backend. It now suppor...

[wxWidgets.git] / include / wx / graphics.h

diff --git a/include/wx/graphics.h b/include/wx/graphics.h
index 87669dfc7a4036f0aa8beeb79064d508208bc2ff..0d472b5bca736e82482c96621fc33c2b1ef75410 100644 (file)
--- a/include/wx/graphics.h
+++ b/include/wx/graphics.h
@@ -27,6 +27,20 @@ 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
@@ -35,6 +49,7 @@ enum wxCompositionMode
     // 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) */
@@ -50,7 +65,7 @@ enum wxCompositionMode
     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;
@@ -58,6 +73,11 @@ class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
 #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;
@@ -349,8 +369,8 @@ public:
     {
         // 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.));
-        m_stops.push_back(wxGraphicsGradientStop(endCol, 1.));
+        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
@@ -392,6 +412,11 @@ 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 );
@@ -486,6 +511,12 @@ public:
     // 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; }
 
@@ -493,7 +524,13 @@ public:
     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);
@@ -626,14 +663,26 @@ public:
 
     // 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
@@ -710,6 +759,11 @@ public:
     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;