X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fsynfig%2Flayer_motionblur.cpp;h=b02ba72a08e13adf871e8c707cda943a724136f9;hb=37600b4b217caa5e316984ec0b035c5e8f9698af;hp=6ac3673fb1ec6e777809d7330e391c72d180c312;hpb=75635270584b5775982adbd70250a0ebc7e3e76b;p=synfig.git

diff --git a/synfig-core/trunk/src/synfig/layer_motionblur.cpp b/synfig-core/trunk/src/synfig/layer_motionblur.cpp
index 6ac3673..b02ba72 100644
--- a/synfig-core/trunk/src/synfig/layer_motionblur.cpp
+++ b/synfig-core/trunk/src/synfig/layer_motionblur.cpp
@@ -1,11 +1,12 @@
 /* === S Y N F I G ========================================================= */
-/*!	\file layer_motionblur.h
+/*!	\file layer_motionblur.cpp
 **	\brief Template Header
 **
-**	$Id: layer_motionblur.cpp,v 1.1.1.1 2005/01/04 01:23:14 darco Exp $
+**	$Id$
 **
 **	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007 Chris Moore
 **
 **	This package is free software; you can redistribute it and/or
 **	modify it under the terms of the GNU General Public License as
@@ -51,11 +52,11 @@ using namespace std;
 /* === G L O B A L S ======================================================= */
 
 SYNFIG_LAYER_INIT(Layer_MotionBlur);
-SYNFIG_LAYER_SET_NAME(Layer_MotionBlur,"MotionBlur");
+SYNFIG_LAYER_SET_NAME(Layer_MotionBlur,"MotionBlur"); // todo: use motion_blur
 SYNFIG_LAYER_SET_LOCAL_NAME(Layer_MotionBlur,_("Motion Blur"));
 SYNFIG_LAYER_SET_CATEGORY(Layer_MotionBlur,_("Blurs"));
 SYNFIG_LAYER_SET_VERSION(Layer_MotionBlur,"0.1");
-SYNFIG_LAYER_SET_CVS_ID(Layer_MotionBlur,"$Id: layer_motionblur.cpp,v 1.1.1.1 2005/01/04 01:23:14 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(Layer_MotionBlur,"$Id$");
 
 /* === M E M B E R S ======================================================= */
 
@@ -64,12 +65,12 @@ Layer_MotionBlur::Layer_MotionBlur():
 	aperture		(0)
 {
 }
-	
+
 bool
 Layer_MotionBlur::set_param(const String &param, const ValueBase &value)
 {
 
-	IMPORT(aperture);		
+	IMPORT(aperture);
 	return Layer_Composite::set_param(param,value);
 }
 
@@ -77,10 +78,10 @@ ValueBase
 Layer_MotionBlur::get_param(const String &param)const
 {
  	EXPORT(aperture);
-	
+
 	EXPORT_NAME();
 	EXPORT_VERSION();
-		
+
 	return Layer_Composite::get_param(param);
 }
 
@@ -106,7 +107,7 @@ Layer_MotionBlur::get_color(Context context, const Point &pos)const
 		Time time(time_cur);
 		time+=(Vector::value_type)( (signed)(RAND_MAX/2)-(signed)rand() )/(Vector::value_type)(RAND_MAX) *aperture -aperture*0.5;
 		context.set_time(time, pos);
-	}	
+	}
 */
 	return context.get_color(pos);
 }
@@ -116,19 +117,19 @@ Layer_MotionBlur::get_param_vocab()const
 {
 	Layer::Vocab ret;
 	//ret=Layer_Composite::get_param_vocab();
-	
+
 	ret.push_back(ParamDesc("aperture")
 		.set_local_name(_("Aperture"))
 		.set_description(_("Shutter Time"))
 	);
-	
+
 	return ret;
 }
 
 bool
 Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 {
-	if(aperture && quality<10)
+	if(aperture && quality<=10)
 	{
 		//int x, y;
 		SuperCallback subimagecb;
@@ -163,34 +164,39 @@ Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int qualit
 				samples=3;
 				break;
 			case 10: // Rough Quality
-            default:			
-				samples=1;
+            default:
+				samples=2;
 				break;
-				
+
 		}
-	
+
+		if (samples == 1) return context.accelerated_render(surface,quality,renddesc,cb);
+
 		Surface tmp;
 		int i;
+		float scale, divisor = 0;
 
 		surface->set_wh(renddesc.get_w(),renddesc.get_h());
 		surface->clear();
-		
+
 		for(i=0;i<samples;i++)
 		{
 			subimagecb=SuperCallback(cb,i*(5000/samples),(i+1)*(5000/samples),5000);
-			context.set_time(time_cur+(aperture/samples)*i-aperture*0.5);
+			context.set_time(time_cur-(aperture*(samples-1-i)/(samples-1)));
 			if(!context.accelerated_render(&tmp,quality,renddesc,&subimagecb))
 				return false;
+			scale = 1.0/(samples-i);
+			divisor += scale;
 			for(int y=0;y<renddesc.get_h();y++)
 				for(int x=0;x<renddesc.get_w();x++)
-					(*surface)[y][x]+=tmp[y][x].premult_alpha();
+					(*surface)[y][x]+=tmp[y][x].premult_alpha()*scale;
 		}
 		for(int y=0;y<renddesc.get_h();y++)
 			for(int x=0;x<renddesc.get_w();x++)
-				(*surface)[y][x]=((*surface)[y][x]/(float)samples).demult_alpha();
+				(*surface)[y][x]=((*surface)[y][x]/divisor).demult_alpha();
 	}
 	else
 		return context.accelerated_render(surface,quality,renddesc,cb);
-	
+
 	return true;
 }