X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fsynfig%2Flayer_motionblur.cpp;h=59f90f7a145fbf6240c687572ff07f7a9ec8ba8b;hb=9459638ad6797b8139f1e9f0715c96076dbf0890;hp=977f4bdb7ae803b4c02ca2d792fa55038b125175;hpb=cc54c38609ee9745ad678e5e9b9d7d2912be9c95;p=synfig.git

diff --git a/synfig-core/trunk/src/synfig/layer_motionblur.cpp b/synfig-core/trunk/src/synfig/layer_motionblur.cpp
index 977f4bd..59f90f7 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.cpp
-**	\brief Template Header
+**	\brief Implementation of the "Motion Blur" layer
 **
 **	$Id$
 **
 **	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007, 2008 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
@@ -51,9 +52,9 @@ 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_LOCAL_NAME(Layer_MotionBlur,_("Motion Blur"));
-SYNFIG_LAYER_SET_CATEGORY(Layer_MotionBlur,_("Blurs"));
+SYNFIG_LAYER_SET_NAME(Layer_MotionBlur,"MotionBlur"); // todo: use motion_blur
+SYNFIG_LAYER_SET_LOCAL_NAME(Layer_MotionBlur,N_("Motion Blur"));
+SYNFIG_LAYER_SET_CATEGORY(Layer_MotionBlur,N_("Blurs"));
 SYNFIG_LAYER_SET_VERSION(Layer_MotionBlur,"0.1");
 SYNFIG_LAYER_SET_CVS_ID(Layer_MotionBlur,"$Id$");
 
@@ -128,7 +129,7 @@ Layer_MotionBlur::get_param_vocab()const
 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;
@@ -160,7 +161,7 @@ Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int qualit
 				samples=3;
 				break;
 			case 9:
-				samples=3;
+				samples=2;
 				break;
 			case 10: // Rough Quality
             default:
@@ -169,8 +170,11 @@ Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int qualit
 
 		}
 
+		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();
@@ -178,16 +182,18 @@ Layer_MotionBlur::accelerated_render(Context context,Surface *surface,int qualit
 		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);