[Synfig-devl] Carlos Lopez : Halftone3: Add support for Cairo render

[root]

Author: Carlos Lopez <genet...@gmail.com>
Date:   Tue Sep 25 20:21:11 2012 +0200

Halftone3: Add support for Cairo render

---

 synfig-core/src/modules/mod_filter/halftone3.cpp |   69 ++++++++++++++++++++++
 synfig-core/src/modules/mod_filter/halftone3.h   |    1 +
 2 files changed, 70 insertions(+), 0 deletions(-)

diff --git a/synfig-core/src/modules/mod_filter/halftone3.cpp 
b/synfig-core/src/modules/mod_filter/halftone3.cpp
index 8b9c841..f62f56d 100644
--- a/synfig-core/src/modules/mod_filter/halftone3.cpp
+++ b/synfig-core/src/modules/mod_filter/halftone3.cpp
@@ -409,3 +409,72 @@ Halftone3::accelerated_render(Context context,Surface 
*surface,int quality, cons
 
        return true;
 }
+
+////
+bool
+Halftone3::accelerated_cairorender(Context context,cairo_surface_t 
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+       SuperCallback supercb(cb,0,9500,10000);
+       
+       if(!context.accelerated_cairorender(surface,quality,renddesc,&supercb))
+               return false;
+       if(get_amount()==0)
+               return true;
+       
+       CairoSurface csurface(surface);
+       if(!csurface.map_cairo_image())
+               return false;
+       const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
+       const Point tl(renddesc.get_tl());
+       const int w(csurface.get_w());
+       const int h(csurface.get_h());
+       const float supersample_size(abs(pw/(tone[0].size).mag()));
+       
+       CairoSurface::pen pen(csurface.begin());
+       Point pos;
+       int x,y;
+       
+       if(is_solid_color())
+       {
+               
for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+                       for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+                               pen.put_value(
+                                       CairoColor(color_func(
+                                                       pos,
+                                                       supersample_size,
+                                                       
Color(pen.get_value().demult_alpha())
+                                                       )).premult_alpha()
+                               );
+       }
+       else
+       {
+               
for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+                       for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+                       {
+                               Color val=Color(pen.get_value().demult_alpha());
+                               pen.put_value(
+                                         CairoColor(Color::blend(
+                                                                 color_func(
+                                                                               
         pos,
+                                                                               
         supersample_size,
+                                                                               
         val
+                                                                               
         ),
+                                                                 val,
+                                                                 get_amount(),
+                                                                 
get_blend_method()
+                                                                 ).clamped()
+                                                ).premult_alpha()
+                               );
+                       }
+               
+       }
+       
+       csurface.unmap_cairo_image();
+       // Mark our progress as finished
+       if(cb && !cb->amount_complete(10000,10000))
+               return false;
+       
+       return true;
+}
+
+////
diff --git a/synfig-core/src/modules/mod_filter/halftone3.h 
b/synfig-core/src/modules/mod_filter/halftone3.h
index 3f19013..73902a9 100644
--- a/synfig-core/src/modules/mod_filter/halftone3.h
+++ b/synfig-core/src/modules/mod_filter/halftone3.h
@@ -72,6 +72,7 @@ public:
        virtual ValueBase get_param(const String &param)const;
        virtual Color get_color(Context context, const Point &pos)const;
        virtual bool accelerated_render(Context context,Surface *surface,int 
quality, const RendDesc &renddesc, ProgressCallback *cb)const;
+       virtual bool accelerated_cairorender(Context context,cairo_surface_t 
*surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
        Layer::Handle hit_check(Context context, const Point &point)const;
        virtual Vocab get_param_vocab()const;
        virtual bool reads_context()const { return true; }


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