SuperSample layer: add support for Cairo render

synfig · Sep 6, 2012 · 7629245 · 7629245
1 parent d5ab011
commit 7629245
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diff --git a/synfig-core/src/modules/lyr_std/supersample.cpp b/synfig-core/src/modules/lyr_std/supersample.cpp
@@ -216,6 +216,66 @@ SuperSample::accelerated_render(Context context,Surface *surface,int quality, co
 	return true;
 }
 
+////
+bool
+SuperSample::accelerated_cairorender(Context context,cairo_surface_t *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+	// don't bother supersampling if our quality is too low.
+	if(quality>=10 || (width==1 && height==1))
+		return context.accelerated_cairorender(surface,quality,renddesc,cb);
+
+	RendDesc desc(renddesc);
+
+	desc.clear_flags();
+	desc.set_wh(desc.get_w()*width,desc.get_h()*height);
+	cairo_surface_t* tempsurface=cairo_surface_create_similar(surface, CAIRO_CONTENT_COLOR_ALPHA, renddesc.get_w()*width, renddesc.get_h()*height);
+	// Render the scene
+	if(!context.accelerated_cairorender(tempsurface,quality,desc,cb))
+		{
+			if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
+			return false;
+		}
+
+	// Calculate the scales values
+	float scalex=1.0/width;
+	float scaley=1.0/height;
+	// Calculate the cairo filter based on quality
+	cairo_filter_t filter;
+	switch(quality)
+	{
+		case 1:
+		case 2:
+		case 3:
+		case 4:
+		case 5:	// Best
+			filter=CAIRO_FILTER_BEST;
+			break;
+		case 6:
+		case 7:
+		case 8:	// Good
+			filter=CAIRO_FILTER_GOOD;
+			break;
+		case 9:	// Fast
+		default:
+			filter=CAIRO_FILTER_FAST;
+			break;
+	}
+	cairo_t* cr=cairo_create(surface);
+	cairo_scale(cr, scalex, scaley);
+	cairo_set_source_surface(cr, tempsurface, 0,0);
+	cairo_pattern_set_filter(cairo_get_source(cr), filter);
+
+	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+	cairo_paint(cr);
+
+	cairo_destroy(cr);
+	cairo_surface_destroy(tempsurface);
+
+	return true;
+}
+
+////
+
 Layer::Vocab
 SuperSample::get_param_vocab(void)const
 {

diff --git a/synfig-core/src/modules/lyr_std/supersample.h b/synfig-core/src/modules/lyr_std/supersample.h
@@ -56,6 +56,7 @@ class SuperSample : public synfig::Layer
 	virtual ValueBase get_param(const String & param)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;
 	virtual synfig::Rect get_bounding_rect(Context context)const;
 
 	virtual Vocab get_param_vocab()const;