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switching to compositing operators (fixes #9881), adding layers

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58917 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Stefan Csomor
2009-02-15 16:52:05 +00:00
parent 977a41ec3e
commit bf02a7f976
6 changed files with 538 additions and 154 deletions
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124
src/generic/graphicc.cpp
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@@ -347,8 +347,14 @@ public:
virtual void * GetNativeContext();
virtual bool SetLogicalFunction( wxRasterOperationMode function );
virtual bool SetAntialiasMode(wxAntialiasMode antialias);
virtual bool SetCompositionMode(wxCompositionMode op);
virtual void BeginLayer(wxDouble opacity);
virtual void EndLayer();
virtual void StrokePath( const wxGraphicsPath& p );
virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
@@ -380,6 +386,8 @@ private:
virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
cairo_t* m_context;
wxVector<float> m_layerOpacities;
wxDECLARE_NO_COPY_CLASS(wxCairoContext);
};
@@ -1536,54 +1544,98 @@ void * wxCairoContext::GetNativeContext()
return m_context;
}
// Cairo doesn't support bitwise logical function (a.k.a. ROP, raster output
// mode). Cairo supports Porter-Duff compositing operators, but they are quite
// different, although in some cases have similar names.
bool wxCairoContext::SetLogicalFunction( wxRasterOperationMode function )
bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
{
if (m_logicalFunction == function)
if (m_antialias == antialias)
return true;
cairo_operator_t op;
switch ( function )
m_antialias = antialias;
cairo_antialias_t antialiasMode;
switch (antialias)
{
case wxCOPY: // (default) src
op = CAIRO_OPERATOR_OVER; // (also default)
case wxANTIALIAS_DEFAULT:
antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
break;
case wxOR: // src OR dst
op = CAIRO_OPERATOR_ADD;
case wxANTIALIAS_NONE:
antialiasMode = CAIRO_ANTIALIAS_NONE;
break;
case wxNO_OP: // dst
op = CAIRO_OPERATOR_DEST; // ignore the source
break;
case wxCLEAR: // 0
op = CAIRO_OPERATOR_CLEAR;// clear dst
break;
case wxAND: // src AND dst
case wxAND_INVERT: // (NOT src) AND dst
case wxAND_REVERSE:// src AND (NOT dst)
case wxEQUIV: // (NOT src) XOR dst
case wxINVERT: // NOT dst
case wxNAND: // (NOT src) OR (NOT dst)
case wxNOR: // (NOT src) AND (NOT dst)
case wxOR_INVERT: // (NOT src) OR dst
case wxOR_REVERSE: // src OR (NOT dst)
case wxSET: // 1
case wxSRC_INVERT: // NOT src
//wxXOR does _not_ correspond to CAIRO_OPERATOR_XOR
case wxXOR: // src XOR dst
default:
return false;
}
m_logicalFunction = function;
cairo_set_operator(m_context, op);
cairo_set_antialias(m_context, antialiasMode);
return true;
}
bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
{
if ( m_composition == op )
return true;
m_composition = op;
cairo_operator_t cop;
switch (op)
{
case wxCOMPOSITION__CLEAR:
cop = CAIRO_OPERATOR_CLEAR;
break;
case wxCOMPOSITION_SOURCE:
cop = CAIRO_OPERATOR_SOURCE;
break;
case wxCOMPOSITION_OVER:
cop = CAIRO_OPERATOR_OVER;
break;
case wxCOMPOSITION_IN:
cop = CAIRO_OPERATOR_IN;
break;
case wxCOMPOSITION_OUT:
cop = CAIRO_OPERATOR_OUT;
break;
case wxCOMPOSITION_ATOP:
cop = CAIRO_OPERATOR_ATOP;
break;
case wxCOMPOSITION_DEST:
cop = CAIRO_OPERATOR_DEST;
break;
case wxCOMPOSITION_DEST_OVER:
cop = CAIRO_OPERATOR_DEST_OVER;
break;
case wxCOMPOSITION_DEST_IN:
cop = CAIRO_OPERATOR_DEST_IN;
break;
case wxCOMPOSITION_DEST_OUT:
cop = CAIRO_OPERATOR_DEST_OUT;
break;
case wxCOMPOSITION_DEST_ATOP:
cop = CAIRO_OPERATOR_DEST_ATOP;
break;
case wxCOMPOSITION_XOR:
cop = CAIRO_OPERATOR_XOR;
break;
case wxCOMPOSITION_ADD:
cop = CAIRO_OPERATOR_ADD;
break;
default:
return false;
}
cairo_set_operator(m_context, cop);
return true;
}
void wxCairoContext::BeginLayer(wxDouble opacity)
{
m_layerOpacities.push_back(opacity);
cairo_push_group(m_context);
}
void wxCairoContext::EndLayer()
{
float opacity = m_layerOpacities.back();
m_layerOpacities.pop_back();
cairo_pop_group_to_source(m_context);
cairo_paint_with_alpha(m_context,opacity);
}
//-----------------------------------------------------------------------------
// wxCairoRenderer declaration
//-----------------------------------------------------------------------------