Freestyle: Fix for view map caching not flashed properly in view port rendering.

3 files changed, 52 insertions, 6 deletions

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")