Freestyle: memory consumption optimization in stroke rendering.

Previously individual strokes were represented by distinct mesh objects
no matter how many vertices and materials each stroke has, although
the vertex and material counts can be quite small depending on the input
scene data.  Now stroke meshes are packed into a minimum number of
mesh objects, so as to reduce the overheads of Blender object creation.

1 files changed, 21 insertions, 4 deletions

diff --git a/source/blender/freestyle/intern/stroke/Stroke.cpp b/source/blender/freestyle/intern/stroke/Stroke.cpp
index 863da069259..244b20f6b89 100644
--- a/source/blender/freestyle/intern/stroke/Stroke.cpp
+++ b/source/blender/freestyle/intern/stroke/Stroke.cpp
@@ -400,6 +400,7 @@ Stroke::Stroke()
 	}
 	_nodeTree = NULL;
 	_tips = false;
+	_rep = NULL;
 }
 
 Stroke::Stroke(const Stroke& iBrother)
@@ -427,6 +428,10 @@ Stroke::Stroke(const Stroke& iBrother)
 	}
 	_nodeTree = iBrother._nodeTree;
 	_tips = iBrother._tips;
+	if (iBrother._rep)
+		_rep = new StrokeRep(*(iBrother._rep));
+	else
+		_rep = NULL;
 }
 
 Stroke::~Stroke()
@@ -439,6 +444,10 @@ Stroke::~Stroke()
 	}
 
 	_ViewEdges.clear();
+	if (_rep) {
+		delete _rep;
+		_rep = NULL;
+	}
 }
 
 Stroke& Stroke::operator=(const Stroke& iBrother)
@@ -456,6 +465,12 @@ Stroke& Stroke::operator=(const Stroke& iBrother)
 	_id = iBrother._id;
 	_ViewEdges = iBrother._ViewEdges;
 	_sampling = iBrother._sampling;
+	if (_rep)
+		delete _rep;
+	if (iBrother._rep)
+		_rep = new StrokeRep(*(iBrother._rep));
+	else
+		_rep = NULL;
 	return *this;
 }
 
@@ -757,14 +772,16 @@ void Stroke::ScaleThickness(float iFactor)
 
 void Stroke::Render(const StrokeRenderer *iRenderer)
 {
-	StrokeRep rep(this);
-	iRenderer->RenderStrokeRep(&rep);
+	if (!_rep)
+		_rep = new StrokeRep(this);
+	iRenderer->RenderStrokeRep(_rep);
 }
 
 void Stroke::RenderBasic(const StrokeRenderer *iRenderer)
 {
-	StrokeRep rep(this);
-	iRenderer->RenderStrokeRepBasic(&rep);
+	if (!_rep)
+		_rep = new StrokeRep(this);
+	iRenderer->RenderStrokeRep(_rep);
 }
 
 Stroke::vertex_iterator Stroke::vertices_begin(float sampling)