Merge remote-tracking branch 'origin/master' into cycles_camera_nodes

Note: the branch currently crashes in blender_camera_nodes.cpp:
BL::NodeTree b_ntree = b_data.node_groups[nodes_tree_name];

The crash was introduced in:
cb7cf523e5

Conflicts:
	intern/cycles/SConscript
	intern/cycles/blender/addon/__init__.py
	intern/cycles/blender/addon/properties.py
	intern/cycles/blender/blender_camera.cpp
	intern/cycles/kernel/kernel_types.h
	intern/cycles/kernel/svm/svm.h
	intern/cycles/kernel/svm/svm_types.h
	intern/cycles/render/camera.cpp
	intern/cycles/render/camera.h

intern/cycles/CMakeLists.txt

@@ -195,6 +195,13 @@ if(WITH_CYCLES_DEBUG)
 	add_definitions(-DWITH_CYCLES_DEBUG)
 endif()
 
+if(WITH_LIBMV)
+	add_definitions(-DWITH_CYCLES_DISTORTION)
+	include_directories(
+		../../extern/libmv
+	)
+endif()
+
 include_directories(
 	SYSTEM
 	${BOOST_INCLUDE_DIR}

intern/cycles/SConscript

@@ -67,6 +67,10 @@ if env['WITH_BF_CYCLES_OSL']:
     defs.append('OSL_STATIC_LIBRARY')
     incs.append(cycles['BF_OSL_INC'])
 
+if env['WITH_BF_LIBMV']:
+    defs.append('WITH_CYCLES_DISTORTION')
+    incs.append('#extern/libmv')
+
 if env['WITH_BF_CYCLES_DEBUG']:
     defs.append('WITH_CYCLES_DEBUG')
 

intern/cycles/blender/CMakeLists.txt

@@ -22,6 +22,7 @@ set(INC_SYS
 
 set(SRC
 	blender_camera.cpp
+	blender_camera_nodes.cpp
 	blender_mesh.cpp
 	blender_object.cpp
 	blender_particles.cpp
@@ -42,6 +43,7 @@ set(SRC
 
 set(ADDON_FILES
 	addon/__init__.py
+	addon/camera_nodes.py
 	addon/engine.py 
 	addon/osl.py
 	addon/presets.py

intern/cycles/blender/addon/__init__.py

@@ -30,10 +30,7 @@ bl_info = {
 
 import bpy
 
-from . import (
-        engine,
-        version_update,
-        )
+from . import engine
 
 
 class CyclesRender(bpy.types.RenderEngine):
@@ -89,28 +86,34 @@ class CyclesRender(bpy.types.RenderEngine):
 
 
 def register():
+    from . import camera_nodes
     from . import ui
     from . import properties
     from . import presets
+    from . import version_update
 
     engine.init()
 
     properties.register()
     ui.register()
     presets.register()
+    camera_nodes.register()
     bpy.utils.register_module(__name__)
 
     bpy.app.handlers.version_update.append(version_update.do_versions)
 
 
 def unregister():
+    from . import camera_nodes
     from . import ui
     from . import properties
     from . import presets
+    from . import version_update
 
     bpy.app.handlers.version_update.remove(version_update.do_versions)
 
     ui.unregister()
     properties.unregister()
     presets.unregister()
+    camera_nodes.unregister()
     bpy.utils.unregister_module(__name__)

intern/cycles/blender/addon/camera_nodes.py

@@ -0,0 +1,165 @@
+#
+# Copyright 2011-2014 Blender Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License
+#
+
+# <pep8 compliant>
+
+import bpy
+import nodeitems_utils
+from bpy.types import NodeTree, Node, NodeSocket
+from bpy.props import EnumProperty, FloatProperty
+from nodeitems_utils import NodeCategory, NodeItem
+
+
+class CameraRaysTree(NodeTree):
+    '''Camera rays node tree'''
+    bl_idname = 'CameraRaysTreeType'
+    bl_label = 'Camera Rays'
+    bl_icon = 'CAMERA_DATA'
+
+
+class CameraRaysTreeNode:
+    @classmethod
+    def poll(cls, ntree):
+        return ntree.bl_idname == 'CameraRaysTreeType'
+
+
+class PathAttributeNode(Node, CameraRaysTreeNode):
+    '''Path attribute input node'''
+    bl_idname = 'PathAttributeNodeType'
+    bl_label = 'Attribute'
+
+    def init(self, context):
+        self.outputs.new('NodeSocketVector', "Raster")
+        self.outputs.new('NodeSocketVector', "Lens")
+        self.outputs.new('NodeSocketFloat', "Time")
+
+    def draw_buttons(self, context, layout):
+        pass
+
+
+class CameraSamplePerspectiveNode(Node, CameraRaysTreeNode):
+    '''Sample perspective camera ray'''
+    bl_idname = 'CameraSamplePerspectiveNodeType'
+    bl_label = 'Sample Perspective'
+
+    def init(self, context):
+        self.inputs.new('NodeSocketVector', "Raster")
+        self.inputs.new('NodeSocketVector', "Lens")
+        self.inputs.new('NodeSocketFloat', "Time")
+        self.outputs.new('NodeSocketVector', "Ray Origin")
+        self.outputs.new('NodeSocketVector', "Ray Direction")
+        self.outputs.new('NodeSocketFloat', "Ray Length")
+
+    def draw_buttons(self, context, layout):
+        pass
+
+
+class CameraRayOutputNode(Node, CameraRaysTreeNode):
+    '''Camera ray output node'''
+    bl_idname = 'CameraRayOutputNodeType'
+    bl_label = 'Ray Output'
+
+    def init(self, context):
+        self.inputs.new('NodeSocketVector', "Ray Origin")
+        self.inputs.new('NodeSocketVector', "Ray Direction")
+        self.inputs.new('NodeSocketFloat', "Ray Length")
+        self.inputs.new('NodeSocketFloat', "Time")
+
+    def draw_buttons(self, context, layout):
+        pass
+
+
+class PolynomialDistortionNode(Node, CameraRaysTreeNode):
+    '''Ray distortion node type'''
+    bl_idname = 'PolynomialDistortionNodeType'
+    bl_label = 'Polynomial Distortion'
+
+    mode = EnumProperty(name="Mode",
+        description="Mode of the distortion",
+        items=(('APPLY', 'Apply',
+                "Apply the radial distortion on the input"),
+               ('INVERT', "Invert",
+                "Invert the radial distortion from the input")),
+        default='INVERT')
+
+    k1 = FloatProperty(name="K1",
+                       description="First coefficient of third "
+                                   "order polynomial radial distortion",
+                       default=0.0)
+
+    k2 = FloatProperty(name="K2",
+                       description="Second coefficient of third "
+                                   "order polynomial radial distortion",
+                       default=0.0)
+
+    k3 = FloatProperty(name="K3",
+                       description="Third coefficient of third "
+                                   "order polynomial radial distortion",
+                       default=0.0)
+
+    def init(self, context):
+        self.inputs.new('NodeSocketVector', "Raster")
+        self.outputs.new('NodeSocketVector', "Raster")
+
+    def draw_buttons(self, context, layout):
+        col = layout.column()
+        col.prop(self, "mode", text="")
+
+        col = layout.column(align=True)
+        col.prop(self, "k1")
+        col.prop(self, "k2")
+        col.prop(self, "k3")
+
+
+class CameraRaysNodeCategory(NodeCategory):
+    @classmethod
+    def poll(cls, context):
+        return context.space_data.tree_type == 'CameraRaysTreeType'
+
+node_categories = [
+    CameraRaysNodeCategory("INPUT", "Input", items=[
+        NodeItem("PathAttributeNodeType"),
+        ]),
+    CameraRaysNodeCategory("OUTPUT", "Output", items=[
+        NodeItem("CameraRayOutputNodeType"),
+        ]),
+    CameraRaysNodeCategory("SAMPLE", "Sample", items=[
+        NodeItem("CameraSamplePerspectiveNodeType"),
+        ]),
+    CameraRaysNodeCategory("DISTORTION", "Distortion", items=[
+        NodeItem("PolynomialDistortionNodeType"),
+        ]),
+    ]
+
+
+def register():
+    bpy.utils.register_class(CameraRaysTree)
+    bpy.utils.register_class(PathAttributeNode)
+    bpy.utils.register_class(CameraSamplePerspectiveNode)
+    bpy.utils.register_class(CameraRayOutputNode)
+    bpy.utils.register_class(PolynomialDistortionNode)
+
+    nodeitems_utils.register_node_categories("CAMERA_NODES", node_categories)
+
+
+def unregister():
+    nodeitems_utils.unregister_node_categories("CAMERA_NODES")
+
+    bpy.utils.unregister_class(CameraRaysTree)
+    bpy.utils.unregister_class(PathAttributeNode)
+    bpy.utils.unregister_class(CameraSamplePerspectiveNode)
+    bpy.utils.unregister_class(CameraRayOutputNode)
+    bpy.utils.unregister_class(PolynomialDistortionNode)

intern/cycles/blender/addon/properties.py

@@ -21,7 +21,8 @@ from bpy.props import (BoolProperty,
                        EnumProperty,
                        FloatProperty,
                        IntProperty,
-                       PointerProperty)
+                       PointerProperty,
+                       StringProperty)
 
 # enums
 
@@ -625,6 +626,9 @@ class CyclesCameraSettings(bpy.types.PropertyGroup):
                 subtype='ANGLE',
                 default=math.pi,
                 )
+        cls.nodes = StringProperty(
+                name="nodes",
+                description="Camera ray nodes")
 
     @classmethod
     def unregister(cls):

intern/cycles/blender/addon/ui.py

@@ -547,6 +547,24 @@ class CyclesCamera_PT_dof(CyclesButtonsPanel, Panel):
         sub.prop(ccam, "aperture_ratio", text="Ratio")
 
 
+class CyclesCamera_PT_ray_nodes(CyclesButtonsPanel, Panel):
+    bl_label = "Ray Nodes"
+    bl_context = "data"
+
+    @classmethod
+    def poll(cls, context):
+        return context.camera and CyclesButtonsPanel.poll(context)
+
+    def draw(self, context):
+        layout = self.layout
+
+        cam = context.camera
+        ccam = cam.cycles
+
+        col = layout.column()
+        col.prop_search(ccam, "nodes", bpy.data, "node_groups", text="")
+
+
 class Cycles_PT_context_material(CyclesButtonsPanel, Panel):
     bl_label = ""
     bl_context = "material"

intern/cycles/blender/blender_camera.cpp

@@ -335,6 +335,8 @@ static void blender_camera_sync(Camera *cam, BlenderCamera *bcam, int width, int
 {
 	/* copy camera to compare later */
 	Camera prevcam = *cam;
+	prevcam.graph = NULL;
+
 	float aspectratio, sensor_size;
 
 	/* viewplane */
@@ -370,6 +372,9 @@ static void blender_camera_sync(Camera *cam, BlenderCamera *bcam, int width, int
 			cam->sensorheight = sensor_size;
 		}
 	}
+	else {
+		cam->sensorwidth = sensor_size;
+	}
 
 	/* clipping distances */
 	cam->nearclip = bcam->nearclip;
@@ -377,6 +382,7 @@ static void blender_camera_sync(Camera *cam, BlenderCamera *bcam, int width, int
 
 	/* type */
 	cam->type = bcam->type;
+	cam->focal_length = bcam->lens;
 
 	/* panorama */
 	cam->panorama_type = bcam->panorama_type;
@@ -455,6 +461,7 @@ void BlenderSync::sync_camera(BL::RenderSettings b_render, BL::Object b_override
 	/* sync */
 	Camera *cam = scene->camera;
 	blender_camera_sync(cam, &bcam, width, height);
+	sync_camera_nodes(b_ob);
 }
 
 void BlenderSync::sync_camera_motion(BL::RenderSettings b_render,
@@ -687,6 +694,7 @@ void BlenderSync::sync_view(BL::SpaceView3D b_v3d, BL::RegionView3D b_rv3d, int
 	blender_camera_border(&bcam, b_engine, b_scene.render(), b_scene, b_v3d, b_rv3d, width, height);
 
 	blender_camera_sync(scene->camera, &bcam, width, height);
+	sync_view_nodes(b_rv3d);
 }
 
 BufferParams BlenderSync::get_buffer_params(BL::RenderSettings b_render, BL::SpaceView3D b_v3d, BL::RegionView3D b_rv3d, Camera *cam, int width, int height)

intern/cycles/blender/blender_camera_nodes.cpp

@@ -0,0 +1,267 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+#include "camera.h"
+#include "graph.h"
+#include "nodes.h"
+#include "camera_nodes.h"
+#include "scene.h"
+
+#include "blender_sync.h"
+#include "blender_util.h"
+
+CCL_NAMESPACE_BEGIN
+
+typedef map<void*, ShaderInput*> PtrInputMap;
+typedef map<void*, ShaderOutput*> PtrOutputMap;
+
+static void set_default_value(ShaderInput *input, BL::Node b_node, BL::NodeSocket b_sock, BL::BlendData b_data, BL::ID b_id)
+{
+	/* copy values for non linked inputs */
+	switch(input->type) {
+	case SHADER_SOCKET_FLOAT: {
+		input->set(get_float(b_sock.ptr, "default_value"));
+		break;
+	}
+	case SHADER_SOCKET_INT: {
+		input->set((float)get_int(b_sock.ptr, "default_value"));
+		break;
+	}
+	case SHADER_SOCKET_COLOR: {
+		input->set(float4_to_float3(get_float4(b_sock.ptr, "default_value")));
+		break;
+	}
+	case SHADER_SOCKET_NORMAL:
+	case SHADER_SOCKET_POINT:
+	case SHADER_SOCKET_VECTOR: {
+		input->set(get_float3(b_sock.ptr, "default_value"));
+		break;
+	}
+	case SHADER_SOCKET_STRING: {
+		input->set((ustring)blender_absolute_path(b_data, b_id, get_string(b_sock.ptr, "default_value")));
+		break;
+	}
+
+	case SHADER_SOCKET_CLOSURE:
+	case SHADER_SOCKET_UNDEFINED:
+		break;
+	}
+}
+
+static bool node_use_modified_socket_name(ShaderNode *node)
+{
+	if (node->special_type == SHADER_SPECIAL_TYPE_SCRIPT)
+		return false;
+
+	return true;
+}
+
+static ShaderInput *node_find_input_by_name(ShaderNode *node, BL::Node b_node, BL::NodeSocket b_socket)
+{
+	string name = b_socket.name();
+
+	if (node_use_modified_socket_name(node)) {
+		BL::Node::inputs_iterator b_input;
+		bool found = false;
+		int counter = 0, total = 0;
+
+		for (b_node.inputs.begin(b_input); b_input != b_node.inputs.end(); ++b_input) {
+			if (b_input->name() == name) {
+				if (!found)
+					counter++;
+				total++;
+			}
+
+			if(b_input->ptr.data == b_socket.ptr.data)
+				found = true;
+		}
+
+		/* rename if needed */
+		if (name == "Shader")
+			name = "Closure";
+
+		if (total > 1)
+			name = string_printf("%s%d", name.c_str(), counter);
+	}
+
+	return node->input(name.c_str());
+}
+
+static ShaderOutput *node_find_output_by_name(ShaderNode *node, BL::Node b_node, BL::NodeSocket b_socket)
+{
+	string name = b_socket.name();
+
+	if (node_use_modified_socket_name(node)) {
+		BL::Node::outputs_iterator b_output;
+		bool found = false;
+		int counter = 0, total = 0;
+
+		for (b_node.outputs.begin(b_output); b_output != b_node.outputs.end(); ++b_output) {
+			if (b_output->name() == name) {
+				if (!found)
+					counter++;
+				total++;
+			}
+
+			if(b_output->ptr.data == b_socket.ptr.data)
+				found = true;
+		}
+
+		/* rename if needed */
+		if (name == "Shader")
+			name = "Closure";
+
+		if (total > 1)
+			name = string_printf("%s%d", name.c_str(), counter);
+	}
+
+	return node->output(name.c_str());
+}
+
+static void add_nodes(BL::BlendData b_data, BL::NodeTree b_ntree, CameraNodesGraph *graph)
+{
+	PtrInputMap input_map;
+	PtrOutputMap output_map;
+
+	/* Synchronize nodes themselves. */
+	BL::NodeTree::nodes_iterator b_node;
+	for(b_ntree.nodes.begin(b_node); b_node != b_ntree.nodes.end(); ++b_node) {
+		ShaderNode *node = NULL;
+		string type = b_node->bl_idname();
+		/* TODO(sergey): Support node groups. */
+		if(type == "PathAttributeNodeType") {
+			node = new PathAttributeNode();
+		}
+		else if(type == "CameraSamplePerspectiveNodeType") {
+			node = new SamplePerspectiveNode();
+		}
+		else if(type == "PolynomialDistortionNodeType") {
+			PolynomialDistortionNode *distortion_node;
+			node = distortion_node = new PolynomialDistortionNode();
+
+			distortion_node->k1 = get_float(b_node->ptr, "k1");
+			distortion_node->k2 = get_float(b_node->ptr, "k2");
+			distortion_node->k3 = get_float(b_node->ptr, "k3");
+			distortion_node->invert = get_enum(b_node->ptr, "mode") == 1;
+		}
+		else if(type == "CameraRayOutputNodeType") {
+			node = graph->output();
+		}
+		else {
+			printf("Uknown camera node type: %s\n", type.c_str());
+			/* Unknown node type, could happen when opening newer file in older
+			 * blender or the node has been deprecated/removed.
+			 */
+		}
+
+		if(node != NULL) {
+			if(node != graph->output())
+				graph->add(node);
+
+			/* Map node sockets for linking */
+			BL::Node::inputs_iterator b_input;
+			for(b_node->inputs.begin(b_input);
+			    b_input != b_node->inputs.end();
+			    ++b_input)
+			{
+				ShaderInput *input = node_find_input_by_name(node,
+				                                             *b_node,
+				                                             *b_input);
+				if(!input) {
+					/* XXX should not happen, report error? */
+					continue;
+				}
+				input_map[b_input->ptr.data] = input;
+
+				set_default_value(input, *b_node, *b_input, b_data, b_ntree);
+			}
+
+			BL::Node::outputs_iterator b_output;
+			for(b_node->outputs.begin(b_output);
+			    b_output != b_node->outputs.end();
+			    ++b_output)
+			{
+				ShaderOutput *output = node_find_output_by_name(node,
+				                                                *b_node,
+				                                                *b_output);
+				if(!output) {
+					/* XXX should not happen, report error? */
+					continue;
+				}
+				output_map[b_output->ptr.data] = output;
+			}
+
+		}
+	}
+
+	/* Connect nodes with noodles. */
+	BL::NodeTree::links_iterator b_link;
+	for(b_ntree.links.begin(b_link); b_link != b_ntree.links.end(); ++b_link) {
+		BL::NodeSocket b_from_sock = b_link->from_socket();
+		BL::NodeSocket b_to_sock = b_link->to_socket();
+
+		ShaderOutput *output = 0;
+		ShaderInput *input = 0;
+
+		PtrOutputMap::iterator output_it = output_map.find(b_from_sock.ptr.data);
+		if(output_it != output_map.end())
+			output = output_it->second;
+		PtrInputMap::iterator input_it = input_map.find(b_to_sock.ptr.data);
+		if(input_it != input_map.end())
+			input = input_it->second;
+
+		/* Either node may be NULL when the node was not exported, typically
+		 * because the node type is not supported */
+		if(output && input)
+			graph->connect(output, input);
+	}
+}
+
+void BlenderSync::sync_camera_nodes(BL::Object b_ob)
+{
+	if(!b_ob) {
+		return;
+	}
+
+	BL::ID b_ob_data = b_ob.data();
+	assert(b_ob_data.is_a(&RNA_Camera));
+
+	BL::Camera b_camera(b_ob_data);
+	PointerRNA ccamera = RNA_pointer_get(&b_ob_data.ptr, "cycles");
+	string nodes_tree_name = get_string(ccamera, "nodes");
+
+	if(nodes_tree_name != "") {
+		BL::NodeTree b_ntree = b_data.node_groups[nodes_tree_name];
+		if (b_ntree) {
+			progress.set_status("Synchronizing camera nodes", b_ntree.name());
+			CameraNodesGraph *graph = new CameraNodesGraph();
+			add_nodes(b_data, b_ntree, graph);
+			scene->camera->set_graph(graph);
+			progress.set_status("");
+		}
+	}
+}
+
+void BlenderSync::sync_view_nodes(BL::RegionView3D b_rv3d)
+{
+	if(b_rv3d.view_perspective() ==
+	   BL::RegionView3D::view_perspective_CAMERA)
+	{
+		sync_camera_nodes(b_scene.camera());
+	}
+}
+
+CCL_NAMESPACE_END

intern/cycles/blender/blender_sync.h

@@ -62,7 +62,9 @@ public:
 	void sync_render_layers(BL::SpaceView3D b_v3d, const char *layer);
 	void sync_integrator();
 	void sync_camera(BL::RenderSettings b_render, BL::Object b_override, int width, int height);
+	void sync_camera_nodes(BL::Object b_ob);
 	void sync_view(BL::SpaceView3D b_v3d, BL::RegionView3D b_rv3d, int width, int height);
+	void sync_view_nodes(BL::RegionView3D b_rv3d);
 	int get_layer_samples() { return render_layer.samples; }
 	int get_layer_bound_samples() { return render_layer.bound_samples; }
 

intern/cycles/kernel/kernel_camera.h

@@ -16,6 +16,8 @@
 
 CCL_NAMESPACE_BEGIN
 
+ccl_device_noinline void svm_eval_camera_nodes(KernelGlobals *kg, CameraData *cd, ShaderType type);
+
 /* Perspective Camera */
 
 ccl_device float2 camera_sample_aperture(KernelGlobals *kg, float u, float v)
@@ -296,6 +298,20 @@ ccl_device void camera_sample(KernelGlobals *kg, int x, int y, float filter_u, f
 		ray->time = time;
 #endif
 
+#ifdef __CAMERA_RAY_NODES__
+	/* TODO(sergey): Add proper check for nodes tree here. */
+	if(kernel_data.cam.shader != 0) {
+		CameraData cd;
+		cd.raster = make_float2(raster_x, raster_y);
+		cd.lens = make_float2(lens_u, lens_v);
+		cd.shader = kernel_data.cam.shader;
+		cd.ray = *ray;
+		svm_eval_camera_nodes(kg, &cd, SHADER_TYPE_CAMERA_RAY);
+		*ray = cd.ray;
+		return;
+	}
+#endif
+
 	/* sample */
 	if(kernel_data.cam.type == CAMERA_PERSPECTIVE)
 		camera_sample_perspective(kg, raster_x, raster_y, lens_u, lens_v, ray);

intern/cycles/kernel/kernel_math.h

@@ -21,6 +21,7 @@
 #include "util_math.h"
 #include "util_math_fast.h"
 #include "util_transform.h"
+#include "util_distort.h"
 
 #endif /* __KERNEL_MATH_H__ */
 

intern/cycles/kernel/kernel_types.h

@@ -74,6 +74,7 @@ CCL_NAMESPACE_BEGIN
 #define __VOLUME_SCATTER__
 #define __SHADOW_RECORD_ALL__
 #define __VOLUME_RECORD_ALL__
+#define __CAMERA_RAY_NODES__
 #endif
 
 #ifdef __KERNEL_CUDA__
@@ -795,6 +796,10 @@ typedef struct KernelCamera {
 	float inv_aperture_ratio;
 
 	int is_inside_volume;
+	int shader;
+
+	float focal_length;
+	float pad[2];
 
 	/* more matrices */
 	Transform screentoworld;
@@ -999,6 +1004,13 @@ typedef struct KernelData {
 	KernelTables tables;
 } KernelData;
 
+typedef struct CameraData {
+	float2 raster;
+	float2 lens;
+	Ray ray;
+	int shader;
+} CameraData;
+
 #ifdef __KERNEL_DEBUG__
 typedef ccl_addr_space struct DebugData {
 	// Total number of BVH node traversal steps and primitives intersections

intern/cycles/kernel/svm/camera_nodes/svm_camera_distortion.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2011-2013 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+CCL_NAMESPACE_BEGIN
+
+/* Polynomial distortion */
+
+ccl_device void svm_node_camera_polynomial_distortion(KernelGlobals *kg,
+                                                      CameraData *cd,
+                                                      uint4 node,
+                                                      float *stack,
+                                                      int *offset)
+{
+	/* Read extra data. */
+	uint4 node1 = read_node(kg, offset);
+	const float k1 = __int_as_float(node.y);
+	const float k2 = __int_as_float(node.z);
+	const float k3 = __int_as_float(node.w);
+	const int invert = __float_as_int(node1.y);
+	const int raster_in_offset = node1.z;
+	const int raster_out_offset =node1.w;
+	const float focal_length = kernel_data.cam.focal_length *
+		kernel_data.cam.width / kernel_data.cam.sensorwidth;
+
+	float2 raster_in, raster_out;
+	raster_in = stack_load_float2(stack, raster_in_offset);
+
+	float2 principal_point = make_float2(kernel_data.cam.width * 0.5f,
+	                                     kernel_data.cam.height * 0.5f);
+
+	if(invert) {
+		util_invert_polynomial_distortion(raster_in,
+		                                  focal_length,
+		                                  principal_point,
+		                                  k1, k2, k3,
+		                                  &raster_out);
+	}
+	else {
+		util_apply_polynomial_distortion(raster_in,
+		                                 focal_length,
+		                                 principal_point,
+		                                 k1, k2, k3,
+		                                 &raster_out);
+	}
+
+	stack_store_float2(stack, raster_out_offset, raster_out);
+}
+
+CCL_NAMESPACE_END

intern/cycles/kernel/svm/camera_nodes/svm_camera_path_attribute.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+CCL_NAMESPACE_BEGIN
+
+/* Path attribute node */
+
+ccl_device void svm_camera_node_path_attribute(KernelGlobals *kg,
+                                               CameraData *cd,
+                                               float *stack,
+                                               uint type,
+                                               uint out_offset)
+{
+	switch(type) {
+		case NODE_CAMERA_PATH_ATTRIBUTE_RASTER:
+			stack_store_float2(stack, out_offset, cd->raster);
+			break;
+		case NODE_CAMERA_PATH_ATTRIBUTE_LENS:
+			stack_store_float2(stack, out_offset, cd->lens);
+			break;
+		case NODE_CAMERA_PATH_ATTRIBUTE_TIME:
+			stack_store_float(stack, out_offset, cd->ray.time);
+			break;
+	}
+
+}
+
+CCL_NAMESPACE_END

intern/cycles/kernel/svm/camera_nodes/svm_camera_ray_output.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+CCL_NAMESPACE_BEGIN
+
+/* Ray output node */
+
+ccl_device void svm_camera_node_ray_output(KernelGlobals *kg,
+                                           CameraData *cd,
+                                           float *stack,
+                                           uint4 node)
+{
+	uint ray_origin_offset, ray_direction_offset, ray_length_offset;
+	uint time_offset;
+
+	decode_node_uchar4(node.y,
+	                   &ray_origin_offset,
+	                   &ray_direction_offset,
+	                   &ray_length_offset,
+	                   &time_offset);
+
+	cd->ray.P = stack_load_float3(stack, ray_origin_offset);
+	cd->ray.D = stack_load_float3(stack, ray_direction_offset);
+	cd->ray.t = stack_load_float(stack, ray_length_offset);
+	cd->ray.time = stack_load_float(stack, time_offset);
+}
+
+CCL_NAMESPACE_END

intern/cycles/kernel/svm/camera_nodes/svm_camera_sample_perspective.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+CCL_NAMESPACE_BEGIN
+
+/* Sample perspective node */
+
+ccl_device void svm_camera_node_sample_perspective(KernelGlobals *kg,
+                                                   CameraData *cd,
+                                                   float *stack,
+                                                   uint4 node)
+{
+	uint raster_offset, lens_offset, time_offset;
+	decode_node_uchar4(node.y, &raster_offset, &lens_offset, &time_offset, NULL);
+
+	/* TODO(sergey): Make sure unconnected sockets are fine here. */
+	float2 raster = stack_load_float2(stack, raster_offset);
+	float2 lens = stack_load_float2(stack, lens_offset);
+	Ray ray;
+	if(stack_valid(time_offset)) {
+		ray.time = stack_load_float(stack, time_offset);
+	}
+	else {
+		ray.time = TIME_INVALID;
+	}
+	camera_sample_perspective(kg, raster.x, raster.y, lens.x, lens.y, &ray);
+
+	uint ray_origin_offset, ray_direction_offset, ray_length_offset;
+	decode_node_uchar4(node.z,
+	                   &ray_origin_offset,
+	                   &ray_direction_offset,
+	                   &ray_length_offset,
+	                   NULL);
+
+	if(stack_valid(ray_origin_offset)) {
+		stack_store_float3(stack, ray_origin_offset, ray.P);
+	}
+	if(stack_valid(ray_direction_offset)) {
+		stack_store_float3(stack, ray_direction_offset, ray.D);
+	}
+	if(stack_valid(ray_length_offset)) {
+		stack_store_float(stack, ray_length_offset, ray.t);
+	}
+}
+
+CCL_NAMESPACE_END

intern/cycles/kernel/svm/svm.h

@@ -61,6 +61,21 @@ ccl_device_inline void stack_store_float3(float *stack, uint a, float3 f)
 	stack[a+2] = f.z;
 }
 
+ccl_device_inline float2 stack_load_float2(float *stack, uint a)
+{
+	kernel_assert(a+1 < SVM_STACK_SIZE);
+
+	return make_float2(stack[a+0], stack[a+1]);
+}
+
+ccl_device_inline void stack_store_float2(float *stack, uint a, float2 f)
+{
+	kernel_assert(a+1 < SVM_STACK_SIZE);
+
+	stack[a+0] = f.x;
+	stack[a+1] = f.y;
+}
+
 ccl_device_inline float stack_load_float(float *stack, uint a)
 {
 	kernel_assert(a < SVM_STACK_SIZE);
@@ -467,5 +482,60 @@ ccl_device_noinline void svm_eval_nodes(KernelGlobals *kg, ShaderData *sd, Shade
 
 CCL_NAMESPACE_END
 
-#endif /* __SVM_H__ */
+#ifdef __CAMERA_RAY_NODES__
+#  include "camera_nodes/svm_camera_distortion.h"
+#  include "camera_nodes/svm_camera_path_attribute.h"
+#  include "camera_nodes/svm_camera_ray_output.h"
+#  include "camera_nodes/svm_camera_sample_perspective.h"
 
+CCL_NAMESPACE_BEGIN
+
+ccl_device_noinline void svm_eval_camera_nodes(KernelGlobals *kg,
+                                               CameraData *cd,
+                                               ShaderType type)
+{
+	float stack[SVM_STACK_SIZE];
+	int offset = cd->shader & SHADER_MASK;
+
+	kernel_assert(type == SHADER_TYPE_CAMERA_RAY);
+
+	while(1) {
+		uint4 node = read_node(kg, &offset);
+
+		switch(node.x) {
+			case NODE_SHADER_JUMP: {
+				if(type == SHADER_TYPE_CAMERA_RAY) offset = node.y;
+				else return;
+				break;
+			}
+			case NODE_CAMERA_PATH_ATTRIBUTE:
+				svm_camera_node_path_attribute(kg, cd, stack, node.y, node.z);
+				break;
+			case NODE_CAMERA_SAMPLE_PERSPECTIVE:
+				svm_camera_node_sample_perspective(kg, cd, stack, node);
+				break;
+			case NODE_CAMERA_RAY_OUTPUT:
+				svm_camera_node_ray_output(kg, cd, stack, node);
+				break;
+			case NODE_CAMERA_POLYNOMIAL_DISTORTION:
+				svm_node_camera_polynomial_distortion(kg, cd, node,
+				                                      stack, &offset);
+				break;
+			case NODE_VALUE_F:
+				svm_node_value_f(kg, NULL, stack, node.y, node.z);
+				break;
+			case NODE_VALUE_V:
+				svm_node_value_v(kg, NULL, stack, node.y, &offset);
+				break;
+			case NODE_END:
+			default:
+				return;
+		}
+	}
+}
+
+CCL_NAMESPACE_END
+
+#endif
+
+#endif /* __SVM_H__ */

intern/cycles/kernel/svm/svm_types.h

@@ -127,6 +127,11 @@ typedef enum NodeType {
 	NODE_HAIR_INFO,
 	NODE_UVMAP,
 	NODE_TEX_VOXEL,
+
+	NODE_CAMERA_PATH_ATTRIBUTE,
+	NODE_CAMERA_SAMPLE_PERSPECTIVE,
+	NODE_CAMERA_RAY_OUTPUT,
+	NODE_CAMERA_POLYNOMIAL_DISTORTION,
 } NodeType;
 
 typedef enum NodeAttributeType {
@@ -358,7 +363,8 @@ typedef enum NodeTexVoxelSpace {
 typedef enum ShaderType {
 	SHADER_TYPE_SURFACE,
 	SHADER_TYPE_VOLUME,
-	SHADER_TYPE_DISPLACEMENT
+	SHADER_TYPE_DISPLACEMENT,
+	SHADER_TYPE_CAMERA_RAY,
 } ShaderType;
 
 /* Closure */
@@ -419,6 +425,12 @@ typedef enum ClosureType {
 	NBUILTIN_CLOSURES
 } ClosureType;
 
+typedef enum NodePathAttribute {
+	NODE_CAMERA_PATH_ATTRIBUTE_RASTER,
+	NODE_CAMERA_PATH_ATTRIBUTE_LENS,
+	NODE_CAMERA_PATH_ATTRIBUTE_TIME,
+} NodePathAttribute;
+
 /* watch this, being lazy with memory usage */
 #define CLOSURE_IS_BSDF(type) (type <= CLOSURE_BSDF_TRANSPARENT_ID)
 #define CLOSURE_IS_BSDF_DIFFUSE(type) (type >= CLOSURE_BSDF_DIFFUSE_ID && type <= CLOSURE_BSDF_DIFFUSE_TOON_ID)

intern/cycles/render/CMakeLists.txt

@@ -20,6 +20,7 @@ set(SRC
 	bake.cpp
 	buffers.cpp
 	camera.cpp
+	camera_nodes.cpp
 	film.cpp
 	graph.cpp
 	image.cpp
@@ -48,6 +49,7 @@ set(SRC_HEADERS
 	background.h
 	buffers.h
 	camera.h
+	camera_nodes.h
 	film.h
 	graph.h
 	image.h

intern/cycles/render/camera.cpp

@@ -15,7 +15,9 @@
  */
 
 #include "camera.h"
+#include "graph.h"
 #include "mesh.h"
+#include "nodes.h"
 #include "object.h"
 #include "scene.h"
 
@@ -84,10 +86,13 @@ Camera::Camera()
 	need_device_update = true;
 	need_flags_update = true;
 	previous_need_motion = -1;
+
+	graph = NULL;
 }
 
 Camera::~Camera()
 {
+	delete graph;
 }
 
 void Camera::compute_auto_viewplane()
@@ -316,6 +321,17 @@ void Camera::device_update(Device *device, DeviceScene *dscene, Scene *scene)
 	kcam->is_inside_volume = 0;
 
 	previous_need_motion = need_motion;
+
+	/* focal length */
+	kcam->focal_length = focal_length;
+
+	/* TODO(sergey): Make sure shaders are fully synced at this point. */
+	if(graph != NULL) {
+		kcam->shader = scene->shader_manager->get_shader_id(scene->shaders.size());
+	}
+	else {
+		kcam->shader = 0;
+	}
 }
 
 void Camera::device_update_volume(Device * /*device*/,
@@ -355,6 +371,7 @@ bool Camera::modified(const Camera& cam)
 		(focaldistance == cam.focaldistance) &&
 		(type == cam.type) &&
 		(fov == cam.fov) &&
+		(focal_length == cam.focal_length) &&
 		(nearclip == cam.nearclip) &&
 		(farclip == cam.farclip) &&
 		(sensorwidth == cam.sensorwidth) &&
@@ -444,4 +461,14 @@ BoundBox Camera::viewplane_bounds_get()
 	return bounds;
 }
 
+void Camera::set_graph(CameraNodesGraph *graph_)
+{
+	if(graph_) {
+		graph_->remove_unneeded_nodes();
+	}
+
+	delete graph;
+	graph = graph_;
+}
+
 CCL_NAMESPACE_END

intern/cycles/render/camera.h

@@ -28,6 +28,7 @@ CCL_NAMESPACE_BEGIN
 class Device;
 class DeviceScene;
 class Scene;
+class CameraNodesGraph;
 
 /* Camera
  *
@@ -48,6 +49,7 @@ public:
 	/* type */
 	CameraType type;
 	float fov;
+	float focal_length;
 
 	/* panorama */
 	PanoramaType panorama_type;
@@ -110,12 +112,17 @@ public:
 	bool need_flags_update;
 	int previous_need_motion;
 
+	/* Camera ray nodes. */
+	CameraNodesGraph *graph;
+
 	/* functions */
 	Camera();
 	~Camera();
 	
 	void compute_auto_viewplane();
 
+	void set_graph(CameraNodesGraph *graph);
+
 	void update();
 
 	void device_update(Device *device, DeviceScene *dscene, Scene *scene);

intern/cycles/render/camera_nodes.cpp

@@ -0,0 +1,187 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+#include "nodes.h"
+#include "camera_nodes.h"
+#include "svm.h"
+#include "osl.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Path attribute */
+
+PathAttributeNode::PathAttributeNode()
+: ShaderNode("path_attribute")
+{
+	add_output("Raster", SHADER_SOCKET_VECTOR);
+	add_output("Lens", SHADER_SOCKET_VECTOR);
+	add_output("Time", SHADER_SOCKET_FLOAT);
+}
+
+void PathAttributeNode::compile(SVMCompiler& compiler)
+{
+	ShaderOutput *out;
+
+	out = output("Raster");
+	if(!out->links.empty()) {
+		compiler.stack_assign(out);
+		compiler.add_node(NODE_CAMERA_PATH_ATTRIBUTE,
+		                  NODE_CAMERA_PATH_ATTRIBUTE_RASTER,
+		                  out->stack_offset);
+	}
+
+	out = output("Lens");
+	if(!out->links.empty()) {
+		compiler.stack_assign(out);
+		compiler.add_node(NODE_CAMERA_PATH_ATTRIBUTE,
+		                  NODE_CAMERA_PATH_ATTRIBUTE_LENS,
+		                  out->stack_offset);
+	}
+
+	out = output("Time");
+	if(!out->links.empty()) {
+		compiler.stack_assign(out);
+		compiler.add_node(NODE_CAMERA_PATH_ATTRIBUTE,
+		                  NODE_CAMERA_PATH_ATTRIBUTE_TIME,
+		                  out->stack_offset);
+	}
+}
+
+void PathAttributeNode::compile(OSLCompiler& compiler)
+{
+}
+
+/* Sample perspective */
+
+SamplePerspectiveNode::SamplePerspectiveNode()
+: ShaderNode("sample_perspective")
+{
+	add_input("Raster", SHADER_SOCKET_VECTOR);
+	add_input("Lens", SHADER_SOCKET_VECTOR);
+	add_input("Time", SHADER_SOCKET_FLOAT);
+	add_output("Ray Origin", SHADER_SOCKET_VECTOR);
+	add_output("Ray Direction", SHADER_SOCKET_VECTOR);
+	add_output("Ray Length", SHADER_SOCKET_FLOAT);
+}
+
+void SamplePerspectiveNode::compile(SVMCompiler& compiler)
+{
+	ShaderInput *raster_in = input("Raster");
+	ShaderInput *lens_in = input("Lens");
+	ShaderInput *time_in = input("Time");
+	ShaderOutput *ray_origin_out = output("Ray Origin");
+	ShaderOutput *ray_direction_out = output("Ray Direction");
+	ShaderOutput *ray_length_out = output("Ray Length");
+
+	if(raster_in->link) {
+		compiler.stack_assign(raster_in);
+	}
+	if(lens_in->link) {
+		compiler.stack_assign(lens_in);
+	}
+	if(time_in->link) {
+		compiler.stack_assign(time_in);
+	}
+	if(!ray_origin_out->links.empty()) {
+		compiler.stack_assign(ray_origin_out);
+	}
+	if(!ray_direction_out->links.empty()) {
+		compiler.stack_assign(ray_direction_out);
+	}
+	if(!ray_length_out->links.empty()) {
+		compiler.stack_assign(ray_length_out);
+	}
+
+	compiler.add_node(NODE_CAMERA_SAMPLE_PERSPECTIVE,
+	                  compiler.encode_uchar4(raster_in->stack_offset,
+	                                         lens_in->stack_offset,
+	                                         time_in->stack_offset, 0),
+	                  compiler.encode_uchar4(ray_origin_out->stack_offset,
+	                                         ray_direction_out->stack_offset,
+	                                         ray_length_out->stack_offset,
+	                                         0));
+}
+
+void SamplePerspectiveNode::compile(OSLCompiler& compiler)
+{
+}
+
+/* Polynomial distortion node. */
+
+PolynomialDistortionNode::PolynomialDistortionNode()
+ : ShaderNode("polynomial_distortion"),
+   k1(0.0f), k2(0.0f), k3(0.0f),
+   invert(false)
+{
+	add_input("Raster", SHADER_SOCKET_VECTOR);
+	add_output("Raster", SHADER_SOCKET_VECTOR);
+}
+
+void PolynomialDistortionNode::compile(SVMCompiler& compiler)
+{
+	ShaderInput *raster_in = input("Raster");
+	ShaderOutput *raster_out = output("Raster");
+
+	compiler.stack_assign(raster_in);
+	compiler.stack_assign(raster_out);
+
+	float3 encoded_distortion = make_float3(k1, k2, k3);
+	compiler.add_node(NODE_CAMERA_POLYNOMIAL_DISTORTION, encoded_distortion);
+	compiler.add_node(NODE_CAMERA_POLYNOMIAL_DISTORTION,
+	                  (int)invert,
+	                  raster_in->stack_offset,
+	                  raster_out->stack_offset);
+}
+
+void PolynomialDistortionNode::compile(OSLCompiler& compiler)
+{
+}
+
+/* Camera Ray Output */
+
+RayOutputNode::RayOutputNode()
+: ShaderNode("ray_output")
+{
+	add_input("Ray Origin", SHADER_SOCKET_VECTOR);
+	add_input("Ray Direction", SHADER_SOCKET_VECTOR);
+	add_input("Ray Length", SHADER_SOCKET_FLOAT);
+	add_input("Time", SHADER_SOCKET_FLOAT);
+}
+
+void RayOutputNode::compile(SVMCompiler& compiler)
+{
+	ShaderInput *ray_origin_in = input("Ray Origin");
+	ShaderInput *ray_direction_in = input("Ray Direction");
+	ShaderInput *ray_length_in = input("Ray Length");
+	ShaderInput *time_in = input("Time");
+
+	compiler.stack_assign(ray_origin_in);
+	compiler.stack_assign(ray_direction_in);
+	compiler.stack_assign(ray_length_in);
+	compiler.stack_assign(time_in);
+
+	compiler.add_node(NODE_CAMERA_RAY_OUTPUT,
+	                  compiler.encode_uchar4(ray_origin_in->stack_offset,
+	                                         ray_direction_in->stack_offset,
+	                                         ray_length_in->stack_offset,
+	                                         time_in->stack_offset));
+}
+
+void RayOutputNode::compile(OSLCompiler& compiler)
+{
+}
+
+CCL_NAMESPACE_END

intern/cycles/render/camera_nodes.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+#ifndef __CAMERA_NODES_H__
+#define __CAMERA_NODES_H__
+
+CCL_NAMESPACE_BEGIN
+
+/* TODO(sergey): Add a petter suitable name. */
+class PathAttributeNode : public ShaderNode {
+public:
+	SHADER_NODE_CLASS(PathAttributeNode)
+};
+
+class SamplePerspectiveNode : public ShaderNode {
+public:
+	SHADER_NODE_CLASS(SamplePerspectiveNode)
+};
+
+class PolynomialDistortionNode : public ShaderNode {
+public:
+	SHADER_NODE_CLASS(PolynomialDistortionNode)
+
+	/* Third order polynomial distortion coefficients. */
+	float k1, k2, k3;
+	bool invert;
+};
+
+class RayOutputNode : public ShaderNode {
+public:
+	SHADER_NODE_CLASS(RayOutputNode)
+};
+
+CCL_NAMESPACE_END
+
+#endif  /* __CAMERA_NODES_H__ */

intern/cycles/render/graph.cpp

@@ -17,6 +17,7 @@
 #include "attribute.h"
 #include "graph.h"
 #include "nodes.h"
+#include "camera_nodes.h"
 #include "shader.h"
 
 #include "util_algorithm.h"
@@ -968,5 +969,27 @@ void ShaderGraph::dump_graph(const char *filename)
 	fclose(fd);
 }
 
+/* CameraNodesGraph */
+
+CameraNodesGraph::CameraNodesGraph()
+{
+	finalized = false;
+	num_node_ids = 0;
+
+	/* TODO(sergey): Ideally we just don't want parent constructor
+	 * to be called from this class.
+	 */
+	foreach(ShaderNode *node, nodes)
+		delete node;
+	nodes.clear();
+
+	add(new RayOutputNode());
+}
+
+RayOutputNode *CameraNodesGraph::output()
+{
+	return (RayOutputNode*)nodes.front();
+}
+
 CCL_NAMESPACE_END
 

intern/cycles/render/graph.h

@@ -37,6 +37,7 @@ class ShaderGraph;
 class SVMCompiler;
 class OSLCompiler;
 class OutputNode;
+class RayOutputNode;
 
 /* Socket Type
  *
@@ -292,6 +293,13 @@ protected:
 	void transform_multi_closure(ShaderNode *node, ShaderOutput *weight_out, bool volume);
 };
 
+/* Graph of camera ray nodes. */
+class CameraNodesGraph : public ShaderGraph {
+public:
+	CameraNodesGraph();
+	RayOutputNode *output();
+};
+
 CCL_NAMESPACE_END
 
 #endif /* __GRAPH_H__ */

intern/cycles/render/svm.cpp

@@ -14,11 +14,13 @@
  * limitations under the License.
  */
 
+#include "camera.h"
 #include "device.h"
 #include "graph.h"
 #include "light.h"
 #include "mesh.h"
 #include "nodes.h"
+#include "camera_nodes.h"
 #include "scene.h"
 #include "shader.h"
 #include "svm.h"
@@ -65,7 +67,12 @@ void SVMShaderManager::device_update(Device *device, DeviceScene *dscene, Scene
 		svm_nodes.push_back(make_int4(NODE_SHADER_JUMP, 0, 0, 0));
 		svm_nodes.push_back(make_int4(NODE_SHADER_JUMP, 0, 0, 0));
 	}
-	
+
+	if(scene->camera->graph != NULL) {
+		svm_nodes.push_back(make_int4(NODE_SHADER_JUMP, 0, 0, 0));
+		svm_nodes.push_back(make_int4(NODE_SHADER_JUMP, 0, 0, 0));
+	}
+
 	for(i = 0; i < scene->shaders.size(); i++) {
 		Shader *shader = scene->shaders[i];
 
@@ -81,6 +88,12 @@ void SVMShaderManager::device_update(Device *device, DeviceScene *dscene, Scene
 		compiler.compile(shader, svm_nodes, i);
 	}
 
+	if(scene->camera->graph != NULL) {
+		SVMCompiler compiler(scene->shader_manager, scene->image_manager);
+		compiler.background = false;
+		compiler.compile(scene->camera, svm_nodes, scene->shaders.size());
+	}
+
 	dscene->svm_nodes.copy((uint4*)&svm_nodes[0], svm_nodes.size());
 	device->tex_alloc("__svm_nodes", dscene->svm_nodes);
 
@@ -691,6 +704,36 @@ void SVMCompiler::compile_type(Shader *shader, ShaderGraph *graph, ShaderType ty
 	add_node(NODE_END, 0, 0, 0);
 }
 
+void SVMCompiler::compile_type(Camera *camera,
+                               CameraNodesGraph *graph)
+{
+	current_type = SHADER_TYPE_CAMERA_RAY;
+	current_graph = graph;
+
+	/* Clear all compiler state. */
+	memset(&active_stack, 0, sizeof(active_stack));
+	svm_nodes.clear();
+
+	foreach(ShaderNode *node_iter, graph->nodes) {
+		foreach(ShaderInput *input, node_iter->inputs)
+			input->stack_offset = SVM_STACK_INVALID;
+		foreach(ShaderOutput *output, node_iter->outputs)
+			output->stack_offset = SVM_STACK_INVALID;
+	}
+
+	RayOutputNode *node = graph->output();
+	set<ShaderNode*> done, closure_done;
+	generate_multi_closure(node, node, done, closure_done);
+
+	/* If compile failed, generate empty shader. */
+	if(compile_failed) {
+		svm_nodes.clear();
+		compile_failed = false;
+	}
+
+	add_node(NODE_END, 0, 0, 0);
+}
+
 void SVMCompiler::compile(Shader *shader, vector<int4>& global_svm_nodes, int index)
 {
 	/* copy graph for shader with bump mapping */
@@ -742,5 +785,22 @@ void SVMCompiler::compile(Shader *shader, vector<int4>& global_svm_nodes, int in
 	global_svm_nodes.insert(global_svm_nodes.end(), svm_nodes.begin(), svm_nodes.end());
 }
 
+void SVMCompiler::compile(Camera *camera,
+                          vector<int4>& global_svm_nodes,
+                          int index)
+{
+	/* Finalize the graph. */
+	/* TODO(sergey): Finalization is currently working for shader nodes only. */
+	/* camera->graph->finalize(false, false); */
+
+	/* Generate camera nodes to SVM nodes. */
+	compile_type(camera, camera->graph);
+	global_svm_nodes[index*2 + 0].y = global_svm_nodes.size();
+	global_svm_nodes[index*2 + 1].y = global_svm_nodes.size();
+	global_svm_nodes.insert(global_svm_nodes.end(),
+	                        svm_nodes.begin(),
+	                        svm_nodes.end());
+}
+
 CCL_NAMESPACE_END
 

intern/cycles/render/svm.h

@@ -26,6 +26,8 @@
 
 CCL_NAMESPACE_BEGIN
 
+class Camera;
+class CameraNodesGraph;
 class Device;
 class DeviceScene;
 class ImageManager;
@@ -54,6 +56,7 @@ class SVMCompiler {
 public:
 	SVMCompiler(ShaderManager *shader_manager, ImageManager *image_manager);
 	void compile(Shader *shader, vector<int4>& svm_nodes, int index);
+	void compile(Camera *camera, vector<int4>& svm_nodes, int index);
 
 	void stack_assign(ShaderOutput *output);
 	void stack_assign(ShaderInput *input);
@@ -141,6 +144,7 @@ protected:
 
 	/* compile */
 	void compile_type(Shader *shader, ShaderGraph *graph, ShaderType type);
+	void compile_type(Camera *camera, CameraNodesGraph *graph);
 
 	vector<int4> svm_nodes;
 	ShaderType current_type;

intern/cycles/util/util_distort.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2011-2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+#ifndef __UTIL_DISTORT_H__
+#define __UTIL_DISTORT_H__
+
+#ifdef WITH_CYCLES_DISTORTION
+#  include "libmv/simple_pipeline/distortion_models.h"
+#endif
+
+CCL_NAMESPACE_BEGIN
+
+ccl_device void util_apply_polynomial_distortion(const float2 image,
+                                                 const float focal_length,
+                                                 const float2 principal_point,
+                                                 const float k1,
+                                                 const float k2,
+                                                 const float k3,
+                                                 float2 *result)
+{
+#if defined(WITH_CYCLES_DISTORTION) && !defined(__KERNEL_GPU__)
+	double normalized_x = (image.x - principal_point.x) / focal_length;
+	double normalized_y = (image.y - principal_point.y) / focal_length;
+	double image_x, image_y;
+	libmv::InvertPolynomialDistortionModel(focal_length, focal_length,
+	                                       normalized_x, normalized_y,
+	                                       k1, k2, k3,
+	                                       0.0, 0.0,
+	                                       image.x, image.y,
+	                                       &image_x, &image_y);
+	result->x = image_x;
+	result->y = image_y;
+#else
+	*result = image;
+#endif
+}
+
+ccl_device void util_invert_polynomial_distortion(const float2 image,
+                                                  const float focal_length,
+                                                  const float2 principal_point,
+                                                  const float k1,
+                                                  const float k2,
+                                                  const float k3,
+                                                  float2 *result)
+{
+#if defined(WITH_CYCLES_DISTORTION) && !defined(__KERNEL_GPU__)
+	double normalized_x, normalized_y;
+	libmv::InvertPolynomialDistortionModel(focal_length, focal_length,
+	                                       principal_point.x, principal_point.y,
+	                                       k1, k2, k3,
+	                                       0.0, 0.0,
+	                                       image.x, image.y,
+	                                       &normalized_x,
+	                                       &normalized_y);
+	result->x = normalized_x * (double)focal_length + (double)principal_point.x;
+	result->y = normalized_y * (double)focal_length + (double)principal_point.y;
+#else
+	*result = image;
+#endif
+}
+
+CCL_NAMESPACE_END
+
+#endif  /* __UTIL_DISTORT_H__ */