X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ccf39540bb96a0e5d067451ad79c82397579aceb..ed8efd46d9c8fa3bf5d10b2a6efd295a6dd71bdb:/interface/wx/graphics.h

diff --git a/interface/wx/graphics.h b/interface/wx/graphics.h
index d463c3e630..10c2ea7485 100644
--- a/interface/wx/graphics.h
+++ b/interface/wx/graphics.h
@@ -22,18 +22,24 @@ class wxGraphicsPath : public wxGraphicsObject
 {
 public:
     /**
-        Adds an arc of a circle centering at (@a x,@a y) with radius (@a r)
-        from @a startAngle to @a endAngle.
+        Adds an arc of a circle.
+
+        The circle is defined by the coordinates of its centre (@a x, @a y) or
+        @a c and its radius @a r. The arc goes from the starting angle @a
+        startAngle to @a endAngle either clockwise or counter-clockwise
+        depending on the value of @a clockwise argument.
+
+        The angles are measured in radians but, contrary to the usual
+        mathematical convention, are always @e clockwise from the horizontal
+        axis.
     */
+    //@{
     virtual void AddArc(wxDouble x, wxDouble y, wxDouble r,
                         wxDouble startAngle, wxDouble endAngle,
                         bool clockwise);
-    /**
-        Adds an arc of a circle centering at @a c with radius (@a r)
-        from @a startAngle to @a endAngle.
-    */
     void AddArc(const wxPoint2DDouble& c, wxDouble r,
                 wxDouble startAngle, wxDouble endAngle, bool clockwise);
+    //@}
 
     /**
         Appends a an arc to two tangents connecting (current) to (@a x1,@a y1)
@@ -194,6 +200,45 @@ public:
     bool IsNull() const;
 };
 
+/**
+    Anti-aliasing modes used by wxGraphicsContext::SetAntialisingMode
+*/
+enum wxAntialiasMode
+{
+    /** No anti-aliasing */
+    wxANTIALIAS_NONE, 
+    
+    /** The default anti-aliasing */
+    wxANTIALIAS_DEFAULT,
+};
+
+/**
+    Compositing is done using Porter-Duff compositions 
+    (see http://keithp.com/~keithp/porterduff/p253-porter.pdf) with
+    wxGraphicsContext::SetCompositionMode
+
+    The description give a short equation on how the values of a resulting
+    pixel are calculated.
+    @e R = Result, @e S = Source, @e D = Destination, colors premultiplied with alpha
+    @e Ra, @e Sa, @e Da their alpha components
+*/
+enum wxCompositionMode
+{
+    wxCOMPOSITION_CLEAR, /**< @e R = 0 */
+    wxCOMPOSITION_SOURCE, /**< @e R = S */
+    wxCOMPOSITION_OVER, /**< @e R = @e S + @e D*(1 - @e Sa) */
+    wxCOMPOSITION_IN, /**< @e R = @e S*@e Da */
+    wxCOMPOSITION_OUT, /**< @e R = @e S*(1 - @e Da) */
+    wxCOMPOSITION_ATOP, /**< @e R = @e S*@e Da + @e D*(1 - @e Sa) */
+
+    wxCOMPOSITION_DEST, /**< @e R = @e D, essentially a noop */
+    wxCOMPOSITION_DEST_OVER, /**< @e R = @e S*(1 - @e Da) + @e D */
+    wxCOMPOSITION_DEST_IN, /**< @e R = @e D*@e Sa */
+    wxCOMPOSITION_DEST_OUT, /**< @e R = @e D*(1 - @e Sa) */
+    wxCOMPOSITION_DEST_ATOP, /**< @e R = @e S*(1 - @e Da) + @e D*@e Sa */
+    wxCOMPOSITION_XOR, /**< @e R = @e S*(1 - @e Da) + @e D*(1 - @e Sa) */
+    wxCOMPOSITION_ADD, /**< @e R = @e S + @e D */
+};
 
 
 /**
@@ -378,13 +423,13 @@ public:
         Draws a polygon.
     */
     virtual void DrawLines(size_t n, const wxPoint2DDouble* points,
-                           int fillStyle = wxODDEVEN_RULE);
+                           wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
 
     /**
         Draws the path by first filling and then stroking.
     */
     virtual void DrawPath(const wxGraphicsPath& path,
-                          int fillStyle = wxODDEVEN_RULE);
+                          wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
 
     /**
         Draws a rectangle.
@@ -451,7 +496,7 @@ public:
         Fills the path with the current brush.
     */
     virtual void FillPath(const wxGraphicsPath& path,
-                          int fillStyle = wxODDEVEN_RULE) = 0;
+                          wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
 
     /**
         Returns the native context (CGContextRef for Core Graphics, Graphics
@@ -564,6 +609,38 @@ public:
         Translates the current transformation matrix.
     */
     virtual void Translate(wxDouble dx, wxDouble dy) = 0;
+
+    /**
+        Redirects 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 
+        the BeginLayer call
+    */
+    virtual void EndLayer() = 0;
+
+    /** 
+        Sets the antialiasing mode, returns true if it supported
+    */
+    virtual bool SetAntialiasMode(wxAntialiasMode antialias) = 0;
+
+    /** 
+        Returns the current shape antialiasing mode
+    */
+    virtual wxAntialiasMode GetAntialiasMode() const ;
+    
+    /**
+        Sets the compositing operator, returns true if it supported
+    */
+    virtual bool SetCompositionMode(wxCompositionMode op) = 0;
+
+    /** 
+        Returns the current compositing operator
+    */
+    virtual wxCompositionMode GetCompositionMode() const;
+    
 };
 
 
@@ -629,6 +706,12 @@ public:
     */
     virtual wxGraphicsContext* CreateContextFromNativeWindow(void* window) = 0;
 
+    /**
+        Creates a wxGraphicsContext that can be used for measuring texts only. 
+        No drawing commands are allowed.
+    */
+    virtual wxGraphicsContext * CreateMeasuringContext() = 0;
+
     /**
         Creates a native graphics font from a wxFont and a text colour.
     */