X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fmodules%2Flyr_std%2Fwarp.cpp;h=f11c290ae069e64a5f92bef19163f433a4946c9a;hb=9459638ad6797b8139f1e9f0715c96076dbf0890;hp=8cb5cd90d5b539a276060571046fdc87f5a7eda5;hpb=70bcefce2ab011a11014f36fc129b473cc0bc61e;p=synfig.git

diff --git a/synfig-core/trunk/src/modules/lyr_std/warp.cpp b/synfig-core/trunk/src/modules/lyr_std/warp.cpp
index 8cb5cd9..f11c290 100644
--- a/synfig-core/trunk/src/modules/lyr_std/warp.cpp
+++ b/synfig-core/trunk/src/modules/lyr_std/warp.cpp
@@ -1,9 +1,12 @@
 /* === S Y N F I G ========================================================= */
 /*!	\file warp.cpp
-**	\brief Template File
+**	\brief Implementation of the "Warp" 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
@@ -49,10 +52,10 @@
 
 SYNFIG_LAYER_INIT(Warp);
 SYNFIG_LAYER_SET_NAME(Warp,"warp");
-SYNFIG_LAYER_SET_LOCAL_NAME(Warp,_("Warp"));
-SYNFIG_LAYER_SET_CATEGORY(Warp,_("Distortions"));
+SYNFIG_LAYER_SET_LOCAL_NAME(Warp,N_("Warp"));
+SYNFIG_LAYER_SET_CATEGORY(Warp,N_("Distortions"));
 SYNFIG_LAYER_SET_VERSION(Warp,"0.1");
-SYNFIG_LAYER_SET_CVS_ID(Warp,"$Id: warp.cpp,v 1.2 2005/01/24 05:00:18 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(Warp,"$Id$");
 
 /* === P R O C E D U R E S ================================================= */
 
@@ -65,8 +68,8 @@ Warp::Warp():
 	src_br	(2,-2),
 	dest_tl	(-1.8,2.1),
 	dest_tr	(1.8,2.1),
-	dest_br	(2.2,-2),
 	dest_bl	(-2.2,-2),
+	dest_br	(2.2,-2),
 	clip	(true)
 {
 	sync();
@@ -514,7 +517,11 @@ Warp::accelerated_render(Context context,Surface *surface,int quality, const Ren
 		// Real trans_z[4];
 		Real z,minz(10000000000000.0f),maxz(0);
 
-
+		//! \todo checking the 4 corners for 0<=z<horizon*2 and using
+		//! only 4 corners which satisfy this condition isn't the
+		//! right thing to do.  It's possible that none of the 4
+		//! corners fall within that range, and yet content of the
+		//! tile does.
 		p=transform_forward(min);
 		z=transform_backward_z(p);
 		if(z>0 && z<horizon*2)
@@ -607,6 +614,12 @@ Warp::accelerated_render(Context context,Surface *surface,int quality, const Ren
 	Point min_point(bounding_rect.get_min());
 	Point max_point(bounding_rect.get_max());
 
+	// we're going to divide by the difference of these pairs soon;
+	// if they're the same, we'll be dividing by zero, and we don't
+	// want to do that!
+	// \todo what should we do in this case?
+	if (min_point[0] == max_point[0]) max_point[0] += 0.001;
+	if (min_point[1] == max_point[1]) max_point[1] += 0.001;
 
 	if(tl[0]>br[0])
 	{
@@ -689,13 +702,11 @@ Warp::accelerated_render(Context context,Surface *surface,int quality, const Ren
 				v=(tmp[1]-tl[1])*src_ph;
 
 				if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
-				{
 					(*surface)[y][x]=context.get_color(tmp);
-				}
 				else
 					(*surface)[y][x]=source.cubic_sample(u,v);
 			}
-			if(y&31==0 && cb)
+			if((y&31)==0 && cb)
 			{
 				if(!stagetwo.amount_complete(y,surface->get_h()))
 					return false;
@@ -725,16 +736,11 @@ Warp::accelerated_render(Context context,Surface *surface,int quality, const Ren
 				v=(tmp[1]-tl[1])*src_ph;
 
 				if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
-				{
-					if(clip)
-						(*surface)[y][x]=Color::alpha();
-					else
-						(*surface)[y][x]=context.get_color(tmp);
-				}
+					(*surface)[y][x]=context.get_color(tmp);
 				else
 					(*surface)[y][x]=source.linear_sample(u,v);
 			}
-			if(y&31==0 && cb)
+			if((y&31)==0 && cb)
 			{
 				if(!stagetwo.amount_complete(y,surface->get_h()))
 					return false;
@@ -763,17 +769,12 @@ Warp::accelerated_render(Context context,Surface *surface,int quality, const Ren
 				v=(tmp[1]-tl[1])*src_ph;
 
 				if(u<0 || v<0 || u>=source.get_w() || v>=source.get_h() || isnan(u) || isnan(v))
-				{
-					if(clip)
-						(*surface)[y][x]=Color::alpha();
-					else
-						(*surface)[y][x]=context.get_color(tmp);
-				}
+					(*surface)[y][x]=context.get_color(tmp);
 				else
-				//pen.set_value(source[v][u]);
-				(*surface)[y][x]=source[floor_to_int(v)][floor_to_int(u)];
+					//pen.set_value(source[v][u]);
+					(*surface)[y][x]=source[floor_to_int(v)][floor_to_int(u)];
 			}
-			if(y&31==0 && cb)
+			if((y&31)==0 && cb)
 			{
 				if(!stagetwo.amount_complete(y,surface->get_h()))
 					return false;