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, 104 insertions, 0 deletions

diff --git a/intern/cycles/util/util_system.cpp b/intern/cycles/util/util_system.cpp
new file mode 100644
index 00000000000..fae575873e0
--- /dev/null
+++ b/intern/cycles/util/util_system.cpp
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ */
+
+#include "util_system.h"
+#include "util_types.h"
+
+#ifdef _WIN32
+#include <intrin.h>
+#include <windows.h>
+#elif defined(__APPLE__)
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#else
+#include <unistd.h>
+#endif
+
+CCL_NAMESPACE_BEGIN
+
+int system_cpu_thread_count()
+{
+	static uint count = 0;
+
+	if(count > 0)
+		return count;
+
+#ifdef _WIN32
+	SYSTEM_INFO info;
+	GetSystemInfo(&info);
+	count = (uint)info.dwNumberOfProcessors;
+#elif defined(__APPLE__)
+	size_t len = sizeof(count);
+	int mib[2] = { CTL_HW, HW_NCPU };
+	
+	sysctl(mib, 2, &count, &len, NULL, 0);
+#else
+	count = (uint)sysconf(_SC_NPROCESSORS_ONLN);
+#endif
+
+	if(count < 1)
+		count = 1;
+
+	return count;
+}
+
+#ifndef _WIN32
+static void __cpuid(int data[4], int selector)
+{
+	asm("cpuid" : "=a" (data[0]), "=b" (data[1]), "=c" (data[2]), "=d" (data[3]) : "a"(selector));
+}
+#endif
+
+static void replace_string(string& haystack, const string& needle, const string& other)
+{
+	size_t i;
+
+	while((i = haystack.find(needle)) != string::npos)
+		haystack.replace(i, needle.length(), other);
+}
+
+string system_cpu_brand_string()
+{
+	char buf[48];
+	int result[4];
+
+	__cpuid(result, 0x80000000);
+
+	if(result[0] >= (int)0x80000004) {
+		__cpuid((int*)(buf+0), 0x80000002);
+		__cpuid((int*)(buf+16), 0x80000003);
+		__cpuid((int*)(buf+32), 0x80000004);
+
+		string brand = buf;
+
+		/* make it a bit more presentable */
+		replace_string(brand, "(TM)", "");
+		replace_string(brand, "(R)", "");
+
+		size_t i;
+		if((i = brand.find("  ")) != string::npos)
+			brand = brand.substr(0, i);
+
+		return brand;
+	}
+
+	return "Unknown CPU";
+}
+
+CCL_NAMESPACE_END
+