Cycles: code refactoring to add generic lookup table memory.

intern/cycles/blender/blender_sync.cpp

@@ -19,7 +19,6 @@
 #include "background.h"
 #include "camera.h"
 #include "film.h"
-#include "../render/filter.h"
 #include "graph.h"
 #include "integrator.h"
 #include "light.h"
@@ -213,18 +212,11 @@ void BlenderSync::sync_film()
 	Film prevfilm = *film;
 
 	film->exposure = get_float(cscene, "film_exposure");
+	film->filter_type = (FilterType)RNA_enum_get(&cscene, "filter_type");
+	film->filter_width = (film->filter_type == FILTER_BOX)? 1.0f: get_float(cscene, "filter_width");
 
 	if(film->modified(prevfilm))
 		film->tag_update(scene);
-
-	Filter *filter = scene->filter;
-	Filter prevfilter = *filter;
-
-	filter->filter_type = (FilterType)RNA_enum_get(&cscene, "filter_type");
-	filter->filter_width = (filter->filter_type == FILTER_BOX)? 1.0f: get_float(cscene, "filter_width");
-
-	if(filter->modified(prevfilter))
-		filter->tag_update(scene);
 }
 
 /* Render Layer */

intern/cycles/device/device_memory.h

@@ -216,6 +216,14 @@ public:
 		return mem;
 	}
 
+	void copy_at(T *ptr, size_t offset, size_t size)
+	{
+		if(size > 0) {
+			size_t mem_size = size*data_elements*datatype_size(data_type);
+			memcpy(&data[0] + offset, ptr, mem_size);
+		}
+	}
+
 	void reference(T *ptr, size_t width, size_t height = 0)
 	{
 		data.clear();

intern/cycles/kernel/kernel_camera.h

@@ -224,8 +224,9 @@ __device void camera_sample(KernelGlobals *kg, int x, int y, float filter_u, flo
 	float lens_u, float lens_v, float time, Ray *ray)
 {
 	/* pixel filter */
-	float raster_x = x + kernel_tex_interp(__filter_table, filter_u, FILTER_TABLE_SIZE);
+	int filter_table_offset = kernel_data.film.filter_table_offset;
-	float raster_y = y + kernel_tex_interp(__filter_table, filter_v, FILTER_TABLE_SIZE);
+	float raster_x = x + kernel_tex_lookup(__lookup_table, filter_u, filter_table_offset, FILTER_TABLE_SIZE);
+	float raster_y = y + kernel_tex_lookup(__lookup_table, filter_v, filter_table_offset, FILTER_TABLE_SIZE);
 
 #ifdef __CAMERA_MOTION__
 	/* motion blur */

intern/cycles/kernel/kernel_compat_cpu.h

@@ -57,7 +57,7 @@ template<typename T> struct texture  {
 	}
 #endif
 
-	float interp(float x, int size)
+	float lookup(float x, int offset, int size)
 	{
 		kernel_assert(size == width);
 
@@ -67,7 +67,7 @@ template<typename T> struct texture  {
 		int nindex = min(index+1, width-1);
 		float t = x - index;
 
-		return (1.0f - t)*data[index] + t*data[nindex];
+		return (1.0f - t)*data[index + offset] + t*data[nindex + offset];
 	}
 
 	T *data;
@@ -157,7 +157,7 @@ typedef texture_image<uchar4> texture_image_uchar4;
 #define kernel_tex_fetch(tex, index) (kg->tex.fetch(index))
 #define kernel_tex_fetch_m128(tex, index) (kg->tex.fetch_m128(index))
 #define kernel_tex_fetch_m128i(tex, index) (kg->tex.fetch_m128i(index))
-#define kernel_tex_interp(tex, t, size) (kg->tex.interp(t, size))
+#define kernel_tex_lookup(tex, t, offset, size) (kg->tex.lookup(t, offset, size))
 #define kernel_tex_image_interp(tex, x, y) ((tex < MAX_FLOAT_IMAGES) ? kg->texture_float_images[tex].interp(x, y) : kg->texture_byte_images[tex - MAX_FLOAT_IMAGES].interp(x, y))
 
 #define kernel_data (kg->__data)

intern/cycles/kernel/kernel_compat_cuda.h

@@ -58,7 +58,7 @@ typedef texture<uchar4, 2, cudaReadModeNormalizedFloat> texture_image_uchar4;
 /* Macros to handle different memory storage on different devices */
 
 #define kernel_tex_fetch(t, index) tex1Dfetch(t, index)
-#define kernel_tex_interp(t, x, size) tex1D(t, x)
+#define kernel_tex_lookup(t, x, offset, size) tex1D(t, x) // XXX broken!
 #define kernel_tex_image_interp(t, x, y) tex2D(t, x, y)
 
 #define kernel_data __data

intern/cycles/kernel/kernel_compat_opencl.h

@@ -46,7 +46,7 @@
 #define kernel_assert(cond)
 
 /* manual implementation of interpolated 1D lookup */
-__device float kernel_tex_interp_(__global float *data, int width, float x)
+__device float kernel_tex_lookup_(__global float *data, int offset, int width, float x)
 {
 	x = clamp(x, 0.0f, 1.0f)*width;
 
@@ -54,7 +54,7 @@ __device float kernel_tex_interp_(__global float *data, int width, float x)
 	int nindex = min(index+1, width-1);
 	float t = x - index;
 
-	return (1.0f - t)*data[index] + t*data[nindex];
+	return (1.0f - t)*data[index + offset] + t*data[nindex + offset];
 }
 
 /* make_type definitions with opencl style element initializers */
@@ -114,7 +114,7 @@ __device float kernel_tex_interp_(__global float *data, int width, float x)
 
 /* data lookup defines */
 #define kernel_data (*kg->data)
-#define kernel_tex_interp(t, x, size) kernel_tex_interp_(kg->t, size, x)
+#define kernel_tex_lookup(t, x, offset, size) kernel_tex_lookup_(kg->t, offset, size, x)
 #define kernel_tex_fetch(t, index) kg->t[index]
 
 /* define NULL */

intern/cycles/kernel/kernel_textures.h

@@ -66,8 +66,8 @@ KERNEL_TEX(uint4, texture_uint4, __svm_nodes)
 KERNEL_TEX(uint, texture_uint, __shader_flag)
 KERNEL_TEX(uint, texture_uint, __object_flag)
 
-/* camera/film */
+/* lookup tables */
-KERNEL_TEX(float, texture_float, __filter_table)
+KERNEL_TEX(float, texture_float, __lookup_table)
 
 /* sobol */
 KERNEL_TEX(uint, texture_uint, __sobol_directions)

intern/cycles/kernel/kernel_types.h

@@ -611,8 +611,9 @@ typedef struct KernelFilm {
 
 	int pass_shadow;
 	float pass_shadow_scale;
-	int pass_pad1;
+
-	int pass_pad2;
+	int filter_table_offset;
+	int filter_pad;
 } KernelFilm;
 
 typedef struct KernelBackground {

intern/cycles/render/CMakeLists.txt

@@ -20,7 +20,6 @@ set(SRC
 	camera.cpp
 	film.cpp
 	# film_response.cpp (code unused)
-	filter.cpp
 	graph.cpp
 	image.cpp
 	integrator.cpp
@@ -37,6 +36,7 @@ set(SRC
 	shader.cpp
 	sobol.cpp
 	svm.cpp
+	tables.cpp
 	tile.cpp
 )
 
@@ -47,7 +47,6 @@ set(SRC_HEADERS
 	camera.h
 	film.h
 	# film_response.h (code unused)
-	filter.h
 	graph.h
 	image.h
 	integrator.h
@@ -63,6 +62,7 @@ set(SRC_HEADERS
 	shader.h
 	sobol.h
 	svm.h
+	tables.h
 	tile.h
 )
 

intern/cycles/render/film.cpp

@@ -22,9 +22,12 @@
 #include "integrator.h"
 #include "mesh.h"
 #include "scene.h"
+#include "tables.h"
 
 #include "util_algorithm.h"
+#include "util_debug.h"
 #include "util_foreach.h"
+#include "util_math.h"
 
 CCL_NAMESPACE_BEGIN
 
@@ -171,12 +174,84 @@ bool Pass::contains(const vector<Pass>& passes, PassType type)
 	return false;
 }
 
+/* Pixel Filter */
+
+static float filter_func_box(float v, float width)
+{
+	return (float)1;
+}
+
+static float filter_func_gaussian(float v, float width)
+{
+	v *= (float)2/width;
+	return (float)expf((float)-2*v*v);
+}
+
+static vector<float> filter_table(FilterType type, float width)
+{
+	const int filter_table_size = FILTER_TABLE_SIZE-1;
+	vector<float> filter_table_cdf(filter_table_size+1);
+	vector<float> filter_table(filter_table_size+1);
+	float (*filter_func)(float, float) = NULL;
+	int i, half_size = filter_table_size/2;
+
+	switch(type) {
+		case FILTER_BOX:
+			filter_func = filter_func_box;
+			break;
+		case FILTER_GAUSSIAN:
+			filter_func = filter_func_gaussian;
+			break;
+		default:
+			assert(0);
+	}
+
+	/* compute cumulative distribution function */
+	filter_table_cdf[0] = 0.0f;
+	
+	for(i = 0; i < filter_table_size; i++) {
+		float x = i*width*0.5f/(filter_table_size-1);
+		float y = filter_func(x, width);
+		filter_table_cdf[i+1] += filter_table_cdf[i] + fabsf(y);
+	}
+
+	for(i = 0; i <= filter_table_size; i++)
+		filter_table_cdf[i] /= filter_table_cdf[filter_table_size];
+	
+	/* create importance sampling table */
+	for(i = 0; i <= half_size; i++) {
+		float x = i/(float)half_size;
+		int index = upper_bound(filter_table_cdf.begin(), filter_table_cdf.end(), x) - filter_table_cdf.begin();
+		float t;
+
+		if(index < filter_table_size+1) {
+			t = (x - filter_table_cdf[index])/(filter_table_cdf[index+1] - filter_table_cdf[index]);
+		}
+		else {
+			t = 0.0f;
+			index = filter_table_size;
+		}
+
+		float y = ((index + t)/(filter_table_size))*width;
+
+		filter_table[half_size+i] = 0.5f*(1.0f + y);
+		filter_table[half_size-i] = 0.5f*(1.0f - y);
+	}
+
+	return filter_table;
+}
+
 /* Film */
 
 Film::Film()
 {
 	exposure = 0.8f;
 	Pass::add(PASS_COMBINED, passes);
+
+	filter_type = FILTER_BOX;
+	filter_width = 1.0f;
+	filter_table_offset = -1;
+
 	need_update = true;
 }
 
@@ -184,10 +259,12 @@ Film::~Film()
 {
 }
 
-void Film::device_update(Device *device, DeviceScene *dscene)
+void Film::device_update(Device *device, DeviceScene *dscene, Scene *scene)
 {
 	if(!need_update)
 		return;
+	
+	device_free(device, dscene, scene);
 
 	KernelFilm *kfilm = &dscene->data.film;
 
@@ -284,17 +361,26 @@ void Film::device_update(Device *device, DeviceScene *dscene)
 
 	kfilm->pass_stride = align_up(kfilm->pass_stride, 4);
 
+	/* update filter table */
+	vector<float> table = filter_table(filter_type, filter_width);
+	filter_table_offset = scene->lookup_tables->add_table(dscene, table);
+	kfilm->filter_table_offset = (int)filter_table_offset;
+
 	need_update = false;
 }
 
-void Film::device_free(Device *device, DeviceScene *dscene)
+void Film::device_free(Device *device, DeviceScene *dscene, Scene *scene)
 {
+	if(filter_table_offset != -1)
+		scene->lookup_tables->remove_table(filter_table_offset);
 }
 
 bool Film::modified(const Film& film)
 {
 	return !(exposure == film.exposure
-		&& Pass::equals(passes, film.passes));
+		&& Pass::equals(passes, film.passes)
+		&& filter_type == film.filter_type
+		&& filter_width == film.filter_width);
 }
 
 void Film::tag_passes_update(Scene *scene, const vector<Pass>& passes_)

intern/cycles/render/film.h

@@ -30,6 +30,11 @@ class Device;
 class DeviceScene;
 class Scene;
 
+typedef enum FilterType {
+	FILTER_BOX,
+	FILTER_GAUSSIAN
+} FilterType;
+
 class Pass {
 public:
 	PassType type;
@@ -47,13 +52,18 @@ class Film {
 public:
 	float exposure;
 	vector<Pass> passes;
+
+	FilterType filter_type;
+	float filter_width;
+	size_t filter_table_offset;
+
 	bool need_update;
 
 	Film();
 	~Film();
 
-	void device_update(Device *device, DeviceScene *dscene);
+	void device_update(Device *device, DeviceScene *dscene, Scene *scene);
-	void device_free(Device *device, DeviceScene *dscene);
+	void device_free(Device *device, DeviceScene *dscene, Scene *scene);
 
 	bool modified(const Film& film);
 	void tag_passes_update(Scene *scene, const vector<Pass>& passes_);

intern/cycles/render/filter.cpp

@@ -1,142 +0,0 @@
-/*
- * 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 "camera.h"
-#include "device.h"
-#include "filter.h"
-#include "scene.h"
-
-#include "kernel_types.h"
-
-#include "util_algorithm.h"
-#include "util_debug.h"
-#include "util_math.h"
-
-CCL_NAMESPACE_BEGIN
-
-Filter::Filter()
-{
-	filter_type = FILTER_BOX;
-	filter_width = 1.0f;
-	need_update = true;
-}
-
-Filter::~Filter()
-{
-}
-
-static float filter_func_box(float v, float width)
-{
-	return (float)1;
-}
-
-static float filter_func_gaussian(float v, float width)
-{
-	v *= (float)2/width;
-	return (float)expf((float)-2*v*v);
-}
-
-static vector<float> filter_table(FilterType type, float width)
-{
-	const int filter_table_size = FILTER_TABLE_SIZE-1;
-	vector<float> filter_table_cdf(filter_table_size+1);
-	vector<float> filter_table(filter_table_size+1);
-	float (*filter_func)(float, float) = NULL;
-	int i, half_size = filter_table_size/2;
-
-	switch(type) {
-		case FILTER_BOX:
-			filter_func = filter_func_box;
-			break;
-		case FILTER_GAUSSIAN:
-			filter_func = filter_func_gaussian;
-			break;
-		default:
-			assert(0);
-	}
-
-	/* compute cumulative distribution function */
-	filter_table_cdf[0] = 0.0f;
-	
-	for(i = 0; i < filter_table_size; i++) {
-		float x = i*width*0.5f/(filter_table_size-1);
-		float y = filter_func(x, width);
-		filter_table_cdf[i+1] += filter_table_cdf[i] + fabsf(y);
-	}
-
-	for(i = 0; i <= filter_table_size; i++)
-		filter_table_cdf[i] /= filter_table_cdf[filter_table_size];
-	
-	/* create importance sampling table */
-	for(i = 0; i <= half_size; i++) {
-		float x = i/(float)half_size;
-		int index = upper_bound(filter_table_cdf.begin(), filter_table_cdf.end(), x) - filter_table_cdf.begin();
-		float t;
-
-		if(index < filter_table_size+1) {
-			t = (x - filter_table_cdf[index])/(filter_table_cdf[index+1] - filter_table_cdf[index]);
-		}
-		else {
-			t = 0.0f;
-			index = filter_table_size;
-		}
-
-		float y = ((index + t)/(filter_table_size))*width;
-
-		filter_table[half_size+i] = 0.5f*(1.0f + y);
-		filter_table[half_size-i] = 0.5f*(1.0f - y);
-	}
-
-	return filter_table;
-}
-
-void Filter::device_update(Device *device, DeviceScene *dscene)
-{
-	if(!need_update)
-		return;
-
-	device_free(device, dscene);
-
-	/* update __filter_table */
-	vector<float> table = filter_table(filter_type, filter_width);
-
-	dscene->filter_table.copy(&table[0], table.size());
-	device->tex_alloc("__filter_table", dscene->filter_table, true);
-
-	need_update = false;
-}
-
-void Filter::device_free(Device *device, DeviceScene *dscene)
-{
-	device->tex_free(dscene->filter_table);
-	dscene->filter_table.clear();
-}
-
-bool Filter::modified(const Filter& filter)
-{
-	return !(filter_type == filter.filter_type &&
-		filter_width == filter.filter_width);
-}
-
-void Filter::tag_update(Scene *scene)
-{
-	need_update = true;
-}
-
-CCL_NAMESPACE_END
-

intern/cycles/render/scene.cpp

@@ -20,19 +20,19 @@
 
 #include "background.h"
 #include "camera.h"
+#include "curves.h"
 #include "device.h"
 #include "film.h"
-#include "filter.h"
 #include "integrator.h"
 #include "light.h"
-#include "shader.h"
 #include "mesh.h"
 #include "object.h"
-#include "particles.h"
-#include "curves.h"
-#include "scene.h"
-#include "svm.h"
 #include "osl.h"
+#include "particles.h"
+#include "scene.h"
+#include "shader.h"
+#include "svm.h"
+#include "tables.h"
 
 #include "util_foreach.h"
 #include "util_progress.h"
@@ -46,7 +46,7 @@ Scene::Scene(const SceneParams& params_, const DeviceInfo& device_info_)
 	memset(&dscene.data, 0, sizeof(dscene.data));
 
 	camera = new Camera();
-	filter = new Filter();
+	lookup_tables = new LookupTables();
 	film = new Film();
 	background = new Background();
 	light_manager = new LightManager();
@@ -93,8 +93,7 @@ void Scene::free_memory(bool final)
 
 	if(device) {
 		camera->device_free(device, &dscene);
-		filter->device_free(device, &dscene);
+		film->device_free(device, &dscene, this);
-		film->device_free(device, &dscene);
 		background->device_free(device, &dscene);
 		integrator->device_free(device, &dscene);
 
@@ -108,10 +107,12 @@ void Scene::free_memory(bool final)
 
 		if(!params.persistent_data || final)
 			image_manager->device_free(device, &dscene);
+
+		lookup_tables->device_free(device, &dscene);
 	}
 
 	if(final) {
-		delete filter;
+		delete lookup_tables;
 		delete camera;
 		delete film;
 		delete background;
@@ -186,15 +187,11 @@ void Scene::device_update(Device *device_, Progress& progress)
 	progress.set_status("Updating Particle Systems");
 	particle_system_manager->device_update(device, &dscene, this, progress);
 
-	if(progress.get_cancel()) return;
-
-	progress.set_status("Updating Filter");
-	filter->device_update(device, &dscene);
 
 	if(progress.get_cancel()) return;
 
 	progress.set_status("Updating Film");
-	film->device_update(device, &dscene);
+	film->device_update(device, &dscene, this);
 
 	if(progress.get_cancel()) return;
 
@@ -203,6 +200,11 @@ void Scene::device_update(Device *device_, Progress& progress)
 
 	if(progress.get_cancel()) return;
 
+	progress.set_status("Updating Lookup Tables");
+	lookup_tables->device_update(device, &dscene);
+
+	if(progress.get_cancel()) return;
+
 	progress.set_status("Updating Device", "Writing constant memory");
 	device->const_copy_to("__data", &dscene.data, sizeof(dscene.data));
 }
@@ -247,7 +249,7 @@ bool Scene::need_reset()
 		|| object_manager->need_update
 		|| mesh_manager->need_update
 		|| light_manager->need_update
-		|| filter->need_update
+		|| lookup_tables->need_update
 		|| integrator->need_update
 		|| shader_manager->need_update
 		|| particle_system_manager->need_update
@@ -261,7 +263,6 @@ void Scene::reset()
 
 	/* ensure all objects are updated */
 	camera->tag_update();
-	filter->tag_update(this);
 	film->tag_update(this);
 	background->tag_update(this);
 	integrator->tag_update(this);

intern/cycles/render/scene.h

@@ -39,10 +39,10 @@ class Camera;
 class Device;
 class DeviceInfo;
 class Film;
-class Filter;
 class Integrator;
 class Light;
 class LightManager;
+class LookupTables;
 class Mesh;
 class MeshManager;
 class Object;
@@ -99,8 +99,8 @@ public:
 	device_vector<uint> shader_flag;
 	device_vector<uint> object_flag;
 
-	/* filter */
+	/* lookup tables */
-	device_vector<float> filter_table;
+	device_vector<float> lookup_table;
 
 	/* integrator */
 	device_vector<uint> sobol_directions;
@@ -155,7 +155,7 @@ class Scene {
 public:
 	/* data */
 	Camera *camera;
-	Filter *filter;
+	LookupTables *lookup_tables;
 	Film *film;
 	Background *background;
 	Integrator *integrator;

intern/cycles/render/tables.cpp

@@ -0,0 +1,106 @@
+/*
+ * 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 "device.h"
+#include "scene.h"
+#include "tables.h"
+
+#include "util_debug.h"
+
+CCL_NAMESPACE_BEGIN
+
+LookupTables::LookupTables()
+{
+	need_update = true;
+}
+
+LookupTables::~LookupTables()
+{
+	assert(lookup_tables.size() == 0);
+}
+
+void LookupTables::device_update(Device *device, DeviceScene *dscene)
+{
+	if(!need_update)
+		return;
+
+	device->tex_alloc("__lookup_table", dscene->lookup_table, true); // XXX interpolation
+
+	need_update = false;
+}
+
+void LookupTables::device_free(Device *device, DeviceScene *dscene)
+{
+	device->tex_free(dscene->lookup_table);
+	dscene->lookup_table.clear();
+}
+
+static size_t round_up_to_multiple(size_t size, size_t chunk)
+{
+	return ((size + chunk - 1)/chunk) * chunk;
+}
+
+size_t LookupTables::add_table(DeviceScene *dscene, vector<float>& data)
+{
+	assert(data.size() > 0);
+
+	need_update = true;
+
+	Table new_table;
+	new_table.offset = 0;
+	new_table.size = round_up_to_multiple(data.size(), TABLE_CHUNK_SIZE);
+
+	/* find space to put lookup table */
+	list<Table>::iterator table;
+
+	for(table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
+		if(new_table.offset + new_table.size <= table->offset) {
+			lookup_tables.insert(table, new_table);
+			break;
+		}
+	}
+
+	if(table == lookup_tables.end()) {
+		/* add at the end */
+		lookup_tables.push_back(new_table);
+		dscene->lookup_table.resize(new_table.offset + new_table.size);
+	}
+
+	/* copy table data and return offset */
+	dscene->lookup_table.copy_at(&data[0], new_table.offset, data.size());
+	return new_table.offset;
+}
+
+void LookupTables::remove_table(size_t offset)
+{
+	need_update = true;
+
+	list<Table>::iterator table;
+
+	for(table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
+		if(table->offset == offset) {
+			lookup_tables.erase(table);
+			break;
+		}
+	}
+
+	assert(table != lookup_tables.end());
+}
+
+CCL_NAMESPACE_END
+

intern/cycles/render/tables.h

@@ -16,8 +16,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __FILTER_H__
+#ifndef __TABLES_H__
-#define __FILTER_H__
+#define __TABLES_H__
+
+#include <util_list.h>
 
 CCL_NAMESPACE_BEGIN
 
@@ -25,29 +27,29 @@ class Device;
 class DeviceScene;
 class Scene;
 
-typedef enum FilterType {
+enum { TABLE_CHUNK_SIZE = 256 };
-	FILTER_BOX,
-	FILTER_GAUSSIAN
-} FilterType;
 
-class Filter {
+class LookupTables {
 public:
-	/* pixel filter */
+	struct Table {
-	FilterType filter_type;
+		size_t offset;
-	float filter_width;
+		size_t size;
-	bool need_update;
+	};
 
-	Filter();
+	bool need_update;
-	~Filter();
+	list<Table> lookup_tables;
+
+	LookupTables();
+	~LookupTables();
 
 	void device_update(Device *device, DeviceScene *dscene);
 	void device_free(Device *device, DeviceScene *dscene);
 
-	bool modified(const Filter& filter);
+	size_t add_table(DeviceScene *dscene, vector<float>& data);
-	void tag_update(Scene *scene);
+	void remove_table(size_t offset);
 };
 
 CCL_NAMESPACE_END
 
-#endif /* __FILTER_H__ */
+#endif /* __TABLES_H__ */