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, 105 insertions, 0 deletions

diff --git a/intern/cycles/kernel/kernel.cl b/intern/cycles/kernel/kernel.cl
new file mode 100644
index 00000000000..a22db5fe040
--- /dev/null
+++ b/intern/cycles/kernel/kernel.cl
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ */
+
+/* OpenCL kernel entry points - unfinished */
+
+#include "kernel_compat_opencl.h"
+#include "kernel_math.h"
+#include "kernel_types.h"
+#include "kernel_globals.h"
+
+typedef struct KernelGlobals {
+	__constant KernelData *data;
+
+	__global float *__response_curve_R;
+	int __response_curve_R_width;
+
+	__global float *__response_curve_G;
+	int __response_curve_G_width;
+
+	__global float *__response_curve_B;
+	int __response_curve_B_width;
+} KernelGlobals;
+
+#include "kernel_film.h"
+//#include "kernel_path.h"
+//#include "kernel_displace.h"
+
+__kernel void kernel_ocl_path_trace(__constant KernelData *data, __global float4 *buffer, __global uint *rng_state, int pass, int sx, int sy, int sw, int sh)
+{
+	KernelGlobals kglobals, *kg = &kglobals;
+	kg->data = data;
+
+	int x = get_global_id(0);
+	int y = get_global_id(1);
+	int w = kernel_data.cam.width;
+
+	if(x < sx + sw && y < sy + sh) {
+		if(pass == 0) {
+			buffer[x + w*y].x = 0.5f;
+			buffer[x + w*y].y = 0.5f;
+			buffer[x + w*y].z = 0.5f;
+		}
+		else {
+			buffer[x + w*y].x += 0.5f;
+			buffer[x + w*y].y += 0.5f;
+			buffer[x + w*y].z += 0.5f;
+		}
+		
+		//= make_float3(1.0f, 0.9f, 0.0f);
+		//kernel_path_trace(buffer, rng_state, pass, x, y);
+	}
+}
+
+__kernel void kernel_ocl_tonemap(
+	__constant KernelData *data,
+	__global uchar4 *rgba,
+	__global float4 *buffer,
+	__global float *__response_curve_R,
+	int __response_curve_R_width,
+	__global float *__response_curve_G,
+	int __response_curve_G_width,
+	__global float *__response_curve_B,
+	int __response_curve_B_width,
+	int pass, int resolution,
+	int sx, int sy, int sw, int sh)
+{
+	KernelGlobals kglobals, *kg = &kglobals;
+
+	kg->data = data;
+	kg->__response_curve_R = __response_curve_R;
+	kg->__response_curve_R_width = __response_curve_R_width;
+	kg->__response_curve_G = __response_curve_G;
+	kg->__response_curve_G_width = __response_curve_G_width;
+	kg->__response_curve_B = __response_curve_B;
+	kg->__response_curve_B_width = __response_curve_B_width;
+
+	int x = sx + get_global_id(0);
+	int y = sy + get_global_id(1);
+
+	if(x < sx + sw && y < sy + sh)
+		kernel_film_tonemap(kg, rgba, buffer, pass, resolution, x, y);
+}
+
+__kernel void kernel_ocl_displace(__global uint4 *input, __global float3 *offset, int sx)
+{
+	int x = sx + get_global_id(0);
+
+	kernel_displace(input, offset, x);
+}
+