Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.

Cycles uses code from some great open source projects, many thanks them:

* BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs":
http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/
* Open Shading Language for a large part of the shading system:
http://code.google.com/p/openshadinglanguage/
* Blender for procedural textures and a few other nodes.
* Approximate Catmull Clark subdivision from NVidia Mesh tools:
http://code.google.com/p/nvidia-mesh-tools/
* Sobol direction vectors from:
http://web.maths.unsw.edu.au/~fkuo/sobol/
* Film response functions from:
http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php

1 files changed, 103 insertions, 0 deletions

diff --git a/intern/cycles/render/osl.h b/intern/cycles/render/osl.h
new file mode 100644
index 00000000000..329cf9a4828
--- /dev/null
+++ b/intern/cycles/render/osl.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __OSL_H__
+#define __OSL_H__
+
+#include "util_set.h"
+
+#include "shader.h"
+
+#ifdef WITH_OSL
+#include <OSL/oslexec.h>
+#endif
+
+CCL_NAMESPACE_BEGIN
+
+class Device;
+class DeviceScene;
+class ImageManager;
+class OSLRenderServices;
+class OSLGlobals;
+class Scene;
+class ShaderGraph;
+class ShaderNode;
+class ShaderOutput;
+
+#ifdef WITH_OSL
+
+/* Shader Manage */
+
+class OSLShaderManager : public ShaderManager {
+public:
+	OSLShaderManager();
+	~OSLShaderManager();
+
+	void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_free(Device *device, DeviceScene *dscene);
+
+private:
+	OSL::ShadingSystem *ss;
+	OSL::TextureSystem *ts;
+	OSLRenderServices *services;
+	OSL::ErrorHandler errhandler;
+};
+
+#endif
+
+/* Graph Compiler */
+
+class OSLCompiler {
+public:
+	OSLCompiler(void *shadingsys);
+	void compile(OSLGlobals *og, Shader *shader);
+
+	void add(ShaderNode *node, const char *name);
+
+	void parameter(const char *name, float f);
+	void parameter_color(const char *name, float3 f);
+	void parameter_vector(const char *name, float3 f);
+	void parameter_normal(const char *name, float3 f);
+	void parameter_point(const char *name, float3 f);
+	void parameter(const char *name, int f);
+	void parameter(const char *name, const char *s);
+	void parameter(const char *name, ustring str);
+	void parameter(const char *name, const Transform& tfm);
+
+	ShaderType output_type() { return current_type; }
+
+	bool background;
+
+private:
+	string id(ShaderNode *node);
+	void compile_type(Shader *shader, ShaderGraph *graph, ShaderType type);
+	bool node_skip_input(ShaderNode *node, ShaderInput *input);
+	string compatible_name(const char *name);
+
+	void find_dependencies(set<ShaderNode*>& dependencies, ShaderInput *input);
+	void generate_nodes(const set<ShaderNode*>& nodes);
+
+	void *shadingsys;
+	ShaderType current_type;
+	Shader *current_shader;
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __OSL_H__  */
+