From 3fea13ed6c0c1488b6f8a2853d76ca0872aabffd Mon Sep 17 00:00:00 2001
From: Tamito Kajiyama <rd6t-kjym@asahi-net.or.jp>
Date: Sun, 5 Oct 2014 00:29:09 +0900
Subject: Freestyle: Fix for view map caching not flashed properly in view port
 rendering.

---
 .../freestyle/intern/application/Controller.cpp    | 25 ++++++++++++----
 .../freestyle/intern/scene_graph/NodeCamera.h      |  2 ++
 .../freestyle/intern/scene_graph/SceneHash.cpp     | 33 +++++++++++++++++++++-
 .../freestyle/intern/scene_graph/SceneHash.h       | 23 +++++++++++----
 4 files changed, 72 insertions(+), 11 deletions(-)

(limited to 'source/blender/freestyle/intern')

diff --git a/source/blender/freestyle/intern/application/Controller.cpp b/source/blender/freestyle/intern/application/Controller.cpp
index 86322bcd350..237176df5e3 100644
--- a/source/blender/freestyle/intern/application/Controller.cpp
+++ b/source/blender/freestyle/intern/application/Controller.cpp
@@ -220,11 +220,10 @@ bool Controller::hitViewMapCache()
 	if (!_EnableViewMapCache) {
 		return false;
 	}
-	real hashCode = sceneHashFunc.getValue();
-	if (prevSceneHash == hashCode) {
+	if (sceneHashFunc.match()) {
 		return (NULL != _ViewMap);
 	}
-	prevSceneHash = hashCode;
+	sceneHashFunc.store();
 	return false;
 }
 
@@ -281,10 +280,26 @@ int Controller::LoadMesh(Render *re, SceneRenderLayer *srl)
 		return 0;
 
 	if (_EnableViewMapCache) {
+
+		NodeCamera *cam;
+		if (freestyle_proj[3][3] != 0.0)
+			cam = new NodeOrthographicCamera;
+		else
+			cam = new NodePerspectiveCamera;
+		double proj[16];
+		for (int i = 0; i < 4; i++) {
+			for (int j = 0; j < 4; j++) {
+				proj[i * 4 + j] = freestyle_proj[i][j];
+			}
+		}
+		cam->setProjectionMatrix(proj);
+		_RootNode->AddChild(cam);
+
 		sceneHashFunc.reset();
-		blenderScene->accept(sceneHashFunc);
+		//blenderScene->accept(sceneHashFunc);
+		_RootNode->accept(sceneHashFunc);
 		if (G.debug & G_DEBUG_FREESTYLE) {
-			printf("Scene hash       : %.16e\n", sceneHashFunc.getValue());
+			cout << "Scene hash       : " << sceneHashFunc.toString() << endl;
 		}
 		if (hitViewMapCache()) {
 			ClearRootNode();
diff --git a/source/blender/freestyle/intern/scene_graph/NodeCamera.h b/source/blender/freestyle/intern/scene_graph/NodeCamera.h
index 5d84a624830..78c34fdef6d 100644
--- a/source/blender/freestyle/intern/scene_graph/NodeCamera.h
+++ b/source/blender/freestyle/intern/scene_graph/NodeCamera.h
@@ -53,7 +53,9 @@ public:
 
 	/*! Default matrices: Identity for both projection and modelview. */
 	NodeCamera(CameraType camera_type = GENERIC); 
+#if 0  /* UNUSED, gives warning in gcc */
 	NodeCamera(const NodeCamera& iBrother);
+#endif
 
 	virtual ~NodeCamera() {}
 
diff --git a/source/blender/freestyle/intern/scene_graph/SceneHash.cpp b/source/blender/freestyle/intern/scene_graph/SceneHash.cpp
index 6e8856f1b93..60b95aaf6c5 100644
--- a/source/blender/freestyle/intern/scene_graph/SceneHash.cpp
+++ b/source/blender/freestyle/intern/scene_graph/SceneHash.cpp
@@ -24,16 +24,47 @@
 
 #include "SceneHash.h"
 
+#include <sstream>
+
 namespace Freestyle {
 
+string SceneHash::toString()
+{
+	 stringstream ss;
+	 ss << hex << _sum;
+	 return ss.str();
+}
+
+void SceneHash::visitNodeCamera(NodeCamera& cam)
+{
+	double *proj = cam.projectionMatrix();
+	for (int i = 0; i < 16; i++) {
+		adler32((unsigned char *)&proj[i], sizeof(double));
+	}
+}
+
 void SceneHash::visitIndexedFaceSet(IndexedFaceSet& ifs)
 {
 	const real *v = ifs.vertices();
 	const unsigned n = ifs.vsize();
 
 	for (unsigned i = 0; i < n; i++) {
-		_hashcode += v[i];
+		adler32((unsigned char *)&v[i], sizeof(v[i]));
+	}
+}
+
+static const int MOD_ADLER = 65521;
+
+void SceneHash::adler32(unsigned char *data, int size)
+{
+	uint32_t sum1 = _sum & 0xffff;
+	uint32_t sum2 = (_sum >> 16) & 0xffff;
+
+	for (int i = 0; i < size; i++) {
+		sum1 = (sum1 + data[i]) % MOD_ADLER;
+		sum2 = (sum1 + sum2) % MOD_ADLER;
 	}
+	_sum = sum1 | (sum2 << 16);
 }
 
 } /* namespace Freestyle */
diff --git a/source/blender/freestyle/intern/scene_graph/SceneHash.h b/source/blender/freestyle/intern/scene_graph/SceneHash.h
index 8f5f847eaab..5521b792e89 100644
--- a/source/blender/freestyle/intern/scene_graph/SceneHash.h
+++ b/source/blender/freestyle/intern/scene_graph/SceneHash.h
@@ -26,8 +26,11 @@
  */
 
 #include "IndexedFaceSet.h"
+#include "NodeCamera.h"
 #include "SceneVisitor.h"
 
+#include "BLI_sys_types.h"
+
 #ifdef WITH_CXX_GUARDEDALLOC
 #include "MEM_guardedalloc.h"
 #endif
@@ -39,23 +42,33 @@ class SceneHash : public SceneVisitor
 public:
 	inline SceneHash() : SceneVisitor()
 	{
-		_hashcode = 0.0;
+		_sum = 1;
 	}
 
 	virtual ~SceneHash() {}
 
+	VISIT_DECL(NodeCamera)
 	VISIT_DECL(IndexedFaceSet)
 
-	inline real getValue() {
-		return _hashcode;
+	string toString();
+
+	inline bool match() {
+		return _sum == _prevSum;
+	}
+
+	inline void store() {
+		_prevSum = _sum;
 	}
 
 	inline void reset() {
-		_hashcode = 0.0;
+		_sum = 1;
 	}
 
 private:
-	real _hashcode;
+	void adler32(unsigned char *data, int size);
+
+	uint32_t _sum;
+	uint32_t _prevSum;
 
 #ifdef WITH_CXX_GUARDEDALLOC
 	MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SceneHash")
-- 
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